More cleanups. Fix things so tinylogin compiles.

Fix a bug in getdelim -- patch from David Whedon <dwhedon@gordian.com>.

31 files changed, 2609 insertions, 143 deletions

diff --git a/Rules.mak b/Rules.mak
index de53f9420..419f25bbb 100644
--- a/Rules.mak
+++ b/Rules.mak
@@ -41,10 +41,10 @@ CFLAGS=$(ARCH_CFLAGS) $(CCFLAGS) $(DEFS)
 
 ifeq ($(DODEBUG),true)
     CFLAGS += -Wall -g
-    LDFLAGS = -nostdlib 
+    LDFLAGS = -nostdlib -Wl,-warn-common 
 else
     CFLAGS  += -Wall #-fomit-frame-pointer
-    LDFLAGS  = -s -nostdlib
+    LDFLAGS  = -s -nostdlib -Wl,-warn-common
 endif
 
 ifndef $(PREFIX)
diff --git a/include/ctype.h b/include/ctype.h
index ddfb1094a..a4fab9bca 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -4,6 +4,10 @@
 #ifndef __CTYPE_H
 #define __CTYPE_H
 
+/* For now, just always use the functions instead of the macros...*/
+#define USE_CTYPE_C_FUNCTIONS
+
+
 #ifdef USE_CTYPE_C_FUNCTIONS
 /* function prototpes */ 
 extern int isalnum(int c);
diff --git a/include/features.h b/include/features.h
index bc80fc541..119fd9215 100644
--- a/include/features.h
+++ b/include/features.h
@@ -22,7 +22,8 @@
 
 #ifdef __STDC__
 
-#define __P(x) x
+#define __P(x)	    x
+#define __PMT(x)    x
 #define __const const
 
 /* Almost ansi */
@@ -53,7 +54,6 @@
 #define __USE_POSIX
 #define __USE_POSIX2
 #define __USE_XOPEN
-#define _POSIX_THREAD_SAFE_FUNCTIONS
 
 
 #include <sys/cdefs.h>
diff --git a/include/sys/vt.h b/include/sys/vt.h
new file mode 100644
index 000000000..834abfbc8
--- /dev/null
+++ b/include/sys/vt.h
@@ -0,0 +1 @@
+#include <linux/vt.h>
diff --git a/include/ucontext.h b/include/ucontext.h
new file mode 100644
index 000000000..d99e95e65
--- /dev/null
+++ b/include/ucontext.h
@@ -0,0 +1,52 @@
+/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* System V ABI compliant user-level context switching support.  */
+
+#ifndef _UCONTEXT_H
+#define _UCONTEXT_H	1
+
+#include <features.h>
+
+/* Get machine dependent definition of data structures.  */
+#include <sys/ucontext.h>
+
+__BEGIN_DECLS
+
+/* Get user context and store it in variable pointed to by UCP.  */
+extern int getcontext __P ((ucontext_t *__ucp));
+
+/* Set user context from information of variable pointed to by UCP.  */
+extern int setcontext __P ((__const ucontext_t *__ucp));
+
+/* Save current context in context variable pointed to by OUCP and set
+   context from variable pointed to by UCP.  */
+extern int swapcontext __P ((ucontext_t *__oucp, __const ucontext_t *__ucp));
+
+/* Manipulate user context UCP to continue with calling functions FUNC
+   and the ARGC-1 parameters following ARGC when the context is used
+   the next time in `setcontext' or `swapcontext'.
+
+   We cannot say anything about the parameters FUNC takes; `void'
+   is as good as any other choice.  */
+extern void makecontext __P ((ucontext_t *__ucp, void (*__func) (void),
+			      int __argc, ...));
+
+__END_DECLS
+
+#endif /* ucontext.h */
diff --git a/include/unistd.h b/include/unistd.h
index 85b49297a..a9f9e4179 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -1,95 +1,588 @@
-/* unistd.h <ndf@linux.mit.edu> */
+/* Copyright (C) 1991-1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/*
+ *	POSIX Standard: 2.10 Symbolic Constants		<unistd.h>
+ */
+
+#ifndef	_UNISTD_H
+#define	_UNISTD_H	1
+
 #include <features.h>
-#include <sys/types.h>
 
-#ifndef __UNISTD_H
-#define __UNISTD_H
+__BEGIN_DECLS
+
+/* These may be used to determine what facilities are present at compile time.
+   Their values can be obtained at run time from `sysconf'.  */
+
+/* POSIX Standard approved as ISO/IEC 9945-1 as of August, 1988 and
+   extended by POSIX-1b (aka POSIX-4) and POSIX-1c (aka POSIX threads).  */
+#define	_POSIX_VERSION	199506L
+
+/* These are not #ifdef __USE_POSIX2 because they are
+   in the theoretically application-owned namespace.  */
+
+/* POSIX Standard approved as ISO/IEC 9945-2 as of December, 1993.  */
+#define	_POSIX2_C_VERSION	199209L
+
+/* The utilities on GNU systems also correspond to this version.  */
+#define _POSIX2_VERSION	199209L
 
-#include <errno.h>
-#ifdef __mc68000__
-#include <asm/unistd.h>
+/* If defined, the implementation supports the
+   C Language Bindings Option.  */
+#define	_POSIX2_C_BIND	1
+
+/* If defined, the implementation supports the
+   C Language Development Utilities Option.  */
+#define	_POSIX2_C_DEV	1
+
+/* If defined, the implementation supports the
+   Software Development Utilities Option.  */
+#define	_POSIX2_SW_DEV	1
+
+/* If defined, the implementation supports the
+   creation of locales with the localedef utility.  */
+#define _POSIX2_LOCALEDEF       1
+
+/* X/Open version number to which the library conforms.  It is selectable.  */
+#ifdef __USE_UNIX98
+# define _XOPEN_VERSION	500
+#else
+# define _XOPEN_VERSION	4
+#endif
+
+/* Commands and utilities from XPG4 are available.  */
+#define _XOPEN_XCU_VERSION	4
+
+/* We are compatible with the old published standards as well.  */
+#define _XOPEN_XPG2	1
+#define _XOPEN_XPG3	1
+#define _XOPEN_XPG4	1
+
+/* The X/Open Unix extensions are available.  */
+#define _XOPEN_UNIX	1
+
+/* Encryption is present.  */
+#define	_XOPEN_CRYPT	1
+
+/* The enhanced internationalization capabilities according to XPG4.2
+   are present.  */
+#define	_XOPEN_ENH_I18N	1
+
+/* The legacy interfaces are also available.  */
+#define _XOPEN_LEGACY	1
+
+
+/* Get values of POSIX options:
+
+   If these symbols are defined, the corresponding features are
+   always available.  If not, they may be available sometimes.
+   The current values can be obtained with `sysconf'.
+
+   _POSIX_JOB_CONTROL		Job control is supported.
+   _POSIX_SAVED_IDS		Processes have a saved set-user-ID
+   				and a saved set-group-ID.
+   _POSIX_REALTIME_SIGNALS	Real-time, queued signals are supported.
+   _POSIX_PRIORITY_SCHEDULING	Priority scheduling is supported.
+   _POSIX_TIMERS		POSIX.4 clocks and timers are supported.
+   _POSIX_ASYNCHRONOUS_IO	Asynchronous I/O is supported.
+   _POSIX_PRIORITIZED_IO	Prioritized asynchronous I/O is supported.
+   _POSIX_SYNCHRONIZED_IO	Synchronizing file data is supported.
+   _POSIX_FSYNC			The fsync function is present.
+   _POSIX_MAPPED_FILES		Mapping of files to memory is supported.
+   _POSIX_MEMLOCK		Locking of all memory is supported.
+   _POSIX_MEMLOCK_RANGE		Locking of ranges of memory is supported.
+   _POSIX_MEMORY_PROTECTION	Setting of memory protections is supported.
+   _POSIX_MESSAGE_PASSING	POSIX.4 message queues are supported.
+   _POSIX_SEMAPHORES		POSIX.4 counting semaphores are supported.
+   _POSIX_SHARED_MEMORY_OBJECTS	POSIX.4 shared memory objects are supported.
+   _POSIX_THREADS		POSIX.1c pthreads are supported.
+   _POSIX_THREAD_ATTR_STACKADDR	Thread stack address attribute option supported.
+   _POSIX_THREAD_ATTR_STACKSIZE	Thread stack size attribute option supported.
+   _POSIX_THREAD_SAFE_FUNCTIONS	Thread-safe functions are supported.
+   _POSIX_THREAD_PRIORITY_SCHEDULING
+				POSIX.1c thread execution scheduling supported.
+   _POSIX_THREAD_PRIO_INHERIT	Thread priority inheritance option supported.
+   _POSIX_THREAD_PRIO_PROTECT	Thread priority protection option supported.
+   _POSIX_THREAD_PROCESS_SHARED	Process-shared synchronization supported.
+   _POSIX_PII			Protocol-independent interfaces are supported.
+   _POSIX_PII_XTI		XTI protocol-indep. interfaces are supported.
+   _POSIX_PII_SOCKET		Socket protocol-indep. interfaces are supported.
+   _POSIX_PII_INTERNET		Internet family of protocols supported.
+   _POSIX_PII_INTERNET_STREAM	Connection-mode Internet protocol supported.
+   _POSIX_PII_INTERNET_DGRAM	Connectionless Internet protocol supported.
+   _POSIX_PII_OSI		ISO/OSI family of protocols supported.
+   _POSIX_PII_OSI_COTS		Connection-mode ISO/OSI service supported.
+   _POSIX_PII_OSI_CLTS		Connectionless ISO/OSI service supported.
+   _POSIX_POLL			Implementation supports `poll' function.
+   _POSIX_SELECT		Implementation supports `select' and `pselect'.
+
+   _XOPEN_REALTIME		X/Open realtime support is available.
+   _XOPEN_REALTIME_THREADS	X/Open realtime thread support is available.
+   _XOPEN_SHM			Shared memory interface according to XPG4.2.
+
+   _XBS5_ILP32_OFF32		Implementation provides environment with 32-bit
+				int, long, pointer, and off_t types.
+   _XBS5_ILP32_OFFBIG		Implementation provides environment with 32-bit
+				int, long, and pointer and off_t with at least
+				64 bits.
+   _XBS5_LP64_OFF64		Implementation provides environment with 32-bit
+				int, and 64-bit long, pointer, and off_t types.
+   _XBS5_LPBIG_OFFBIG		Implementation provides environment with at
+				least 32 bits int and long, pointer, and off_t
+				with at least 64 bits.
+
+   If any of these symbols is defined as -1, the corresponding option is not
+   true for any file.  If any is defined as other than -1, the corresponding
+   option is true for all files.  If a symbol is not defined at all, the value
+   for a specific file can be obtained from `pathconf' and `fpathconf'.
+
+   _POSIX_CHOWN_RESTRICTED	Only the super user can use `chown' to change
+   				the owner of a file.  `chown' can only be used
+				to change the group ID of a file to a group of
+				which the calling process is a member.
+   _POSIX_NO_TRUNC		Pathname components longer than
+   				NAME_MAX generate an error.
+   _POSIX_VDISABLE		If defined, if the value of an element of the
+				`c_cc' member of `struct termios' is
+				_POSIX_VDISABLE, no character will have the
+				effect associated with that element.
+   _POSIX_SYNC_IO		Synchronous I/O may be performed.
+   _POSIX_ASYNC_IO		Asynchronous I/O may be performed.
+   _POSIX_PRIO_IO		Prioritized Asynchronous I/O may be performed.
+
+   Support for the Large File Support interface is not generally available.
+   If it is available the following constants are defined to one.
+   _LFS64_LARGEFILE		Low-level I/O supports large files.
+   _LFS64_STDIO			Standard I/O supports large files.
+   */
+
+#include <bits/posix_opt.h>
+
+/* Get the environment definitions from Unix98.  */
+#ifdef __USE_UNIX98
+# include <bits/environments.h>
 #endif
-#define STDIN_FILENO 0
-#define STDOUT_FILENO 1
-#define STDERR_FILENO 2
 
+/* Standard file descriptors.  */
+#define	STDIN_FILENO	0	/* Standard input.  */
+#define	STDOUT_FILENO	1	/* Standard output.  */
+#define	STDERR_FILENO	2	/* Standard error output.  */
 
-/* NULL-terminated array of "NAME=VALUE" environment variables.  */
-extern char **__environ;
-extern char **environ;
 
+/* All functions that are not declared anywhere else.  */
+
+#include <bits/types.h>
+
+#ifndef	ssize_t
+typedef __ssize_t ssize_t;
+# define ssize_t ssize_t
+#endif
+
+#define	__need_size_t
+#define __need_NULL
+#include <stddef.h>
+
+#ifdef __USE_XOPEN
+/* The Single Unix specification says that some more types are
+   available here.  */
+# ifndef gid_t
+typedef __gid_t gid_t;
+#  define gid_t gid_t
+# endif
+
+# ifndef uid_t
+typedef __uid_t uid_t;
+#  define uid_t uid_t
+# endif
+
+# ifndef off_t
+#  ifndef __USE_FILE_OFFSET64
+typedef __off_t off_t;
+#  else
+typedef __off64_t off_t;
+#  endif
+#  define off_t off_t
+# endif
+# if defined __USE_LARGEFILE64 && !defined off64_t
+typedef __off64_t off64_t;
+#  define off64_t off64_t
+# endif
+
+# ifndef pid_t
+typedef __pid_t pid_t;
+#  define pid_t pid_t
+# endif
+#endif	/* X/Open */
+
+#ifdef __USE_UNIX98
+# ifndef intptr_t
+typedef __intptr_t intptr_t;
+#  define intptr_t intptr_t
+# endif
+#endif	/* Unix98 */
+
+/* Values for the second argument to access.
+   These may be OR'd together.  */
+#define	R_OK	4		/* Test for read permission.  */
+#define	W_OK	2		/* Test for write permission.  */
+#define	X_OK	1		/* Test for execute permission.  */
+#define	F_OK	0		/* Test for existence.  */
+
+/* Test for access to NAME using the real UID and real GID.  */
+extern int access __P ((__const char *__name, int __type));
+
+#ifdef __USE_GNU
+/* Test for access to NAME using the effective UID and GID
+   (as normal file operations use).  */
+extern int euidaccess __P ((__const char *__name, int __type));
+#endif
+
+
+/* Values for the WHENCE argument to lseek.  */
+#ifndef	_STDIO_H		/* <stdio.h> has the same definitions.  */
+# define SEEK_SET	0	/* Seek from beginning of file.  */
+# define SEEK_CUR	1	/* Seek from current position.  */
+# define SEEK_END	2	/* Seek from end of file.  */
+#endif
+
+#if defined __USE_BSD && !defined L_SET
+/* Old BSD names for the same constants; just for compatibility.  */
+# define L_SET		SEEK_SET
+# define L_INCR		SEEK_CUR
+# define L_XTND		SEEK_END
+#endif
+
+
+/* Move FD's file position to OFFSET bytes from the
+   beginning of the file (if WHENCE is SEEK_SET),
+   the current position (if WHENCE is SEEK_CUR),
+   or the end of the file (if WHENCE is SEEK_END).
+   Return the new file position.  */
+extern __off_t __lseek __P ((int __fd, __off_t __offset, int __whence));
+#ifndef __USE_FILE_OFFSET64
+extern __off_t lseek __P ((int __fd, __off_t __offset, int __whence));
+#else
+# ifdef __REDIRECT
+extern __off64_t __REDIRECT (lseek,
+			     __P ((int __fd, __off64_t __offset,
+				   int __whence)),
+			     lseek64);
+# else
+#  define lseek lseek64
+# endif
+#endif
+#ifdef __USE_LARGEFILE64
+extern __off64_t lseek64 __P ((int __fd, __off64_t __offset, int __whence));
+#endif
 
-extern int close __P ((int));
-extern size_t read __P ((int __fd, char * __buf, size_t __nbytes));
-extern size_t write __P ((int __fd, __const char * __buf, size_t __n));
-extern off_t lseek __P ((int __fd, off_t __n, int __whence));
+/* Close the file descriptor FD.  */
+extern int __close __P ((int __fd));
+extern int close __P ((int __fd));
+
+/* Read NBYTES into BUF from FD.  Return the
+   number read, -1 for errors or 0 for EOF.  */
+extern ssize_t __read __P ((int __fd, __ptr_t __buf, size_t __nbytes));
+extern ssize_t read __P ((int __fd, __ptr_t __buf, size_t __nbytes));
+
+/* Write N bytes of BUF to FD.  Return the number written, or -1.  */
+extern ssize_t __write __P ((int __fd, __const __ptr_t __buf, size_t __n));
+extern ssize_t write __P ((int __fd, __const __ptr_t __buf, size_t __n));
+
+#ifdef __USE_UNIX98
+/* Read NBYTES into BUF from FD at the given position OFFSET without
+   changing the file pointer.  Return the number read, -1 for errors
+   or 0 for EOF.  */
+extern ssize_t __pread64 __P ((int __fd, __ptr_t __buf, size_t __nbytes,
+			       __off64_t __offset));
+/* Write N bytes of BUF to FD at the given position OFFSET without
+   changing the file pointer.  Return the number written, or -1.  */
+extern ssize_t __pwrite64 __P ((int __fd, __const __ptr_t __buf, size_t __n,
+				__off64_t __offset));
+
+# ifndef __USE_FILE_OFFSET64
+extern ssize_t pread __P ((int __fd, __ptr_t __buf, size_t __nbytes,
+			   __off_t __offset));
+extern ssize_t pwrite __P ((int __fd, __const __ptr_t __buf, size_t __n,
+			    __off_t __offset));
+# else
+#  ifdef __REDIRECT
+extern ssize_t __REDIRECT (pread, __P ((int __fd, __ptr_t __buf,
+					size_t __nbytes,__off64_t __offset)),
+			   pread64);
+extern ssize_t __REDIRECT (pwrite, __P ((int __fd, __const __ptr_t __buf,
+					 size_t __nbytes, __off64_t __offset)),
+			pwrite64);
+#  else
+#   define pread pread64
+#   define pwrite pwrite64
+#  endif
+# endif
+
+# ifdef __USE_LARGEFILE64
+extern ssize_t pread64 __P ((int __fd, __ptr_t __buf, size_t __nbytes,
+			     __off64_t __offset));
+extern ssize_t pwrite64 __P ((int __fd, __const __ptr_t __buf, size_t __n,
+			      __off64_t __offset));
+# endif
+#endif
+
+/* Create a one-way communication channel (pipe).
+   If successful, two file descriptors are stored in PIPEDES;
+   bytes written on PIPEDES[1] can be read from PIPEDES[0].
+   Returns 0 if successful, -1 if not.  */
 extern int pipe __P ((int __pipedes[2]));
+
+/* Schedule an alarm.  In SECONDS seconds, the process will get a SIGALRM.
+   If SECONDS is zero, any currently scheduled alarm will be cancelled.
+   The function returns the number of seconds remaining until the last
+   alarm scheduled would have signaled, or zero if there wasn't one.
+   There is no return value to indicate an error, but you can set `errno'
+   to 0 and check its value after calling `alarm', and this might tell you.
+   The signal may come late due to processor scheduling.  */
 extern unsigned int alarm __P ((unsigned int __seconds));
+
+/* Make the process sleep for SECONDS seconds, or until a signal arrives
+   and is not ignored.  The function returns the number of seconds less
+   than SECONDS which it actually slept (thus zero if it slept the full time).
+   If a signal handler does a `longjmp' or modifies the handling of the
+   SIGALRM signal while inside `sleep' call, the handling of the SIGALRM
+   signal afterwards is undefined.  There is no return value to indicate
+   error, but if `sleep' returns SECONDS, it probably didn't work.  */
 extern unsigned int sleep __P ((unsigned int __seconds));
-extern void usleep __P ((unsigned long __microseconds));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Set an alarm to go off (generating a SIGALRM signal) in VALUE
+   microseconds.  If INTERVAL is nonzero, when the alarm goes off, the
+   timer is reset to go off every INTERVAL microseconds thereafter.
+   Returns the number of microseconds remaining before the alarm.  */
+extern unsigned int ualarm __P ((unsigned int __value,
+				 unsigned int __interval));
+
+/* Sleep USECONDS microseconds, or until a signal arrives that is not blocked
+   or ignored.  */
+extern void usleep __P ((unsigned int __useconds));
+#endif
+
+
+/* Suspend the process until a signal arrives.
+   This always returns -1 and sets `errno' to EINTR.  */
 extern int pause __P ((void));
-extern char*    crypt __P((__const char *__key, __const char *__salt));
-extern int isatty __P ((int __fd));
-extern char *ttyname __P ((int __fd));
-extern int readlink __P ((__const char *__path, char *__buf, size_t __len));
-extern int link __P ((__const char *__from, __const char *__to));
-extern int symlink __P ((__const char *__from, __const char *__to));
-extern int readlink __P ((__const char *__path, char *__buf, size_t __len));
-extern int unlink __P ((__const char *__name));
+
+
+/* Change the owner and group of FILE.  */
+extern int chown __P ((__const char *__file, __uid_t __owner,
+		       __gid_t __group));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Change the owner and group of the file that FD is open on.  */
+extern int fchown __P ((int __fd, __uid_t __owner, __gid_t __group));
+
+
+/* Change owner and group of FILE, if it is a symbolic
+   link the ownership of the symbolic link is changed.  */
+extern int lchown __P ((__const char *__file, __uid_t __owner,
+			__gid_t __group));
+
+#endif /* Use BSD || X/Open Unix.  */
+
+/* Change the process's working directory to PATH.  */
+extern int chdir __P ((__const char *__path));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Change the process's working directory to the one FD is open on.  */
+extern int fchdir __P ((int __fd));
+#endif
+
+/* Get the pathname of the current working directory,
+   and put it in SIZE bytes of BUF.  Returns NULL if the
+   directory couldn't be determined or SIZE was too small.
+   If successful, returns BUF.  In GNU, if BUF is NULL,
+   an array is allocated with `malloc'; the array is SIZE
+   bytes long, unless SIZE == 0, in which case it is as
+   big as necessary.  */
 extern char *getcwd __P ((char *__buf, size_t __size));
+
+#ifdef	__USE_GNU
+/* Return a malloc'd string containing the current directory name.
+   If the environment variable `PWD' is set, and its value is correct,
+   that value is used.  */
+extern char *get_current_dir_name __P ((void));
+#endif
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Put the absolute pathname of the current working directory in BUF.
+   If successful, return BUF.  If not, put an error message in
+   BUF and return NULL.  BUF should be at least PATH_MAX bytes long.  */
+extern char *getwd __P ((char *__buf));
+#endif
+
+
 /* Duplicate FD, returning a new file descriptor on the same file.  */
 extern int dup __P ((int __fd));
+
 /* Duplicate FD to FD2, closing FD2 and making it open on the same file.  */
 extern int dup2 __P ((int __fd, int __fd2));
-extern int fchdir __P ((int __fd));
-extern int chdir __P ((__const char *__path));
-extern int chown __P ((__const char *__file,
-                       uid_t __owner, gid_t __group));
 
-extern int fchown __P ((int __fd,
-                       uid_t __owner, gid_t __group));
+/* NULL-terminated array of "NAME=VALUE" environment variables.  */
+extern char **__environ;
+#ifdef __USE_GNU
+extern char **environ;
+#endif
 
-extern int fsync __P ((int __fd));
 
-extern int sync __P ((void));
+/* Replace the current process, executing PATH with arguments ARGV and
+   environment ENVP.  ARGV and ENVP are terminated by NULL pointers.  */
+extern int execve __P ((__const char *__path, char *__const __argv[],
+			char *__const __envp[]));
 
-extern int rmdir __P ((__const char *__path));
+#ifdef __USE_GNU
+/* Execute the file FD refers to, overlaying the running program image.
+   ARGV and ENVP are passed to the new program, as for `execve'.  */
+extern int fexecve __P ((int __fd,
+			 char *__const __argv[], char *__const __envp[]));
 
-extern int rename __P((__const char* _old, __const char* _new));
+#endif
 
-extern int access __P ((__const char *__name, int __type));
 
-extern int      reboot __P ((int __magic, int __magic_too, int __flag));
+/* Execute PATH with arguments ARGV and environment from `environ'.  */
+extern int execv __P ((__const char *__path, char *__const __argv[]));
 
-extern int mkstemp __P ((char * __template));
-extern char * mktemp __P ((char * __template));
+/* Execute PATH with all arguments after PATH until a NULL pointer,
+   and the argument after that for environment.  */
+extern int execle __P ((__const char *__path, __const char *__arg, ...));
 
-extern int _clone __P ((int (*fn)(void *arg), void *child_stack, int flags, void *arg));
+/* Execute PATH with all arguments after PATH until
+   a NULL pointer and environment from `environ'.  */
+extern int execl __P ((__const char *__path, __const char *__arg, ...));
 
-/* Return the current machine's Internet number.  */
-extern long int gethostid __P ((void));
+/* Execute FILE, searching in the `PATH' environment variable if it contains
+   no slashes, with arguments ARGV and environment from `environ'.  */
+extern int execvp __P ((__const char *__file, char *__const __argv[]));
 
-/* Put the name of the current host in no more than LEN bytes of NAME.
-   The result is null-terminated if LEN is large enough for the full
-   name and the terminator.  */
-extern int gethostname __P ((char *__name, size_t __len));
+/* Execute FILE, searching in the `PATH' environment variable if
+   it contains no slashes, with all arguments after FILE until a
+   NULL pointer and environment from `environ'.  */
+extern int execlp __P ((__const char *__file, __const char *__arg, ...));
 
-/* Set the name of the current host to NAME, which is LEN bytes long.
-   This call is restricted to the super-user.  */
-extern int sethostname __P ((__const char *__name, size_t __len));
 
+#if defined __USE_MISC || defined __USE_XOPEN
+/* Add INC to priority of the current process.  */
+extern int nice __P ((int __inc));
+#endif
 
-/* Set the user ID of the calling process to UID.
-   If the calling process is the super-user, set the real
-   and effective user IDs, and the saved set-user-ID to UID;
-   if not, the effective user ID is set to UID.  */
-extern int setuid __P ((__uid_t __uid));
+
+/* Terminate program execution with the low-order 8 bits of STATUS.  */
+extern void _exit __PMT ((int __status)) __attribute__ ((__noreturn__));
+
+
+/* Get the `_PC_*' symbols for the NAME argument to `pathconf' and `fpathconf';
+   the `_SC_*' symbols for the NAME argument to `sysconf';
+   and the `_CS_*' symbols for the NAME argument to `confstr'.  */
+#include <bits/confname.h>
+
+/* Get file-specific configuration information about PATH.  */
+extern long int pathconf __P ((__const char *__path, int __name));
+
+/* Get file-specific configuration about descriptor FD.  */
+extern long int fpathconf __P ((int __fd, int __name));
+
+/* Get the value of the system variable NAME.  */
+extern long int sysconf __P ((int __name));
+
+#ifdef	__USE_POSIX2
+/* Get the value of the string-valued system variable NAME.  */
+extern size_t confstr __P ((int __name, char *__buf, size_t __len));
+#endif
+
+
+/* Get the process ID of the calling process.  */
+extern __pid_t __getpid __P ((void));
+extern __pid_t getpid __P ((void));
+
+/* Get the process ID of the calling process's parent.  */
+extern __pid_t getppid __P ((void));
+
+/* Get the process group ID of the calling process.
+   This function is different on old BSD. */
+#ifndef __FAVOR_BSD
+extern __pid_t getpgrp __P ((void));
+#else
+# ifdef __REDIRECT
+extern __pid_t __REDIRECT (getpgrp, __P ((__pid_t __pid)), __getpgid);
+# else
+#  define getpgrp __getpgid
+# endif
+#endif
+
+/* Get the process group ID of process PID.  */
+extern __pid_t __getpgid __P ((__pid_t __pid));
+#ifdef __USE_XOPEN_EXTENDED
+extern __pid_t getpgid __P ((__pid_t __pid));
+#endif
+
+
+/* Set the process group ID of the process matching PID to PGID.
+   If PID is zero, the current process's process group ID is set.
+   If PGID is zero, the process ID of the process is used.  */
+extern int __setpgid __P ((__pid_t __pid, __pid_t __pgid));
+extern int setpgid __P ((__pid_t __pid, __pid_t __pgid));
+
+#if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Both System V and BSD have `setpgrp' functions, but with different
+   calling conventions.  The BSD function is the same as POSIX.1 `setpgid'
+   (above).  The System V function takes no arguments and puts the calling
+   process in its on group like `setpgid (0, 0)'.
+
+   New programs should always use `setpgid' instead.
+
+   The default in GNU is to provide the System V function.  The BSD
+   function is available under -D_BSD_SOURCE.  */
+
+# ifndef __FAVOR_BSD
+
+/* Set the process group ID of the calling process to its own PID.
+   This is exactly the same as `setpgid (0, 0)'.  */
+extern int setpgrp __P ((void));
+
+# else
+
+/* Another name for `setpgid' (above).  */
+#  ifdef __REDIRECT
+extern int __REDIRECT (setpgrp, __P ((__pid_t __pid, __pid_t __pgrp)),
+		       setpgid);
+#  else
+#   define setpgrp setpgid
+#  endif
+
+# endif	/* Favor BSD.  */
+#endif	/* Use SVID or BSD.  */
 
 /* Create a new session with the calling process as its leader.
    The process group IDs of the session and the calling process
    are set to the process ID of the calling process, which is returned.  */
 extern __pid_t setsid __P ((void));
 
+#ifdef __USE_XOPEN_EXTENDED
+/* Return the session ID of the given process.  */
+extern __pid_t getsid __P ((__pid_t __pid));
+#endif
+
 /* Get the real user ID of the calling process.  */
 extern __uid_t getuid __P ((void));
 
@@ -102,113 +595,412 @@ extern __gid_t getgid __P ((void));
 /* Get the effective group ID of the calling process.  */
 extern __gid_t getegid __P ((void));
 
+/* If SIZE is zero, return the number of supplementary groups
+   the calling process is in.  Otherwise, fill in the group IDs
+   of its supplementary groups in LIST and return the number written.  */
+extern int getgroups __P ((int __size, __gid_t __list[]));
+
+#ifdef	__USE_GNU
+/* Return nonzero iff the calling process is in group GID.  */
+extern int group_member __P ((__gid_t __gid));
+#endif
+
+/* Set the user ID of the calling process to UID.
+   If the calling process is the super-user, set the real
+   and effective user IDs, and the saved set-user-ID to UID;
+   if not, the effective user ID is set to UID.  */
+extern int setuid __P ((__uid_t __uid));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 /* Set the real user ID of the calling process to RUID,
    and the effective user ID of the calling process to EUID.  */
 extern int setreuid __P ((__uid_t __ruid, __uid_t __euid));
+#endif
+
+#ifdef	__USE_BSD
+/* Set the effective user ID of the calling process to UID.  */
+extern int seteuid __P ((__uid_t __uid));
+#endif /* Use BSD.  */
+
+/* Set the group ID of the calling process to GID.
+   If the calling process is the super-user, set the real
+   and effective group IDs, and the saved set-group-ID to GID;
+   if not, the effective group ID is set to GID.  */
+extern int setgid __P ((__gid_t __gid));
 
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
 /* Set the real group ID of the calling process to RGID,
    and the effective group ID of the calling process to EGID.  */
 extern int setregid __P ((__gid_t __rgid, __gid_t __egid));
+#endif
 
-/* If SIZE is zero, return the number of supplementary groups
-   the calling process is in.  Otherwise, fill in the group IDs
-   of its supplementary groups in LIST and return the number written.  */
-extern int getgroups __P ((int __size, __gid_t __list[]));
+#ifdef __USE_BSD
+/* Set the effective group ID of the calling process to GID.  */
+extern int setegid __P ((__gid_t __gid));
+#endif /* Use BSD.  */
 
 
+/* Clone the calling process, creating an exact copy.
+   Return -1 for errors, 0 to the new process,
+   and the process ID of the new process to the old process.  */
+extern __pid_t __fork __P ((void));
+extern __pid_t fork __P ((void));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Clone the calling process, but without copying the whole address space.
+   The calling process is suspended until the new process exits or is
+   replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
+   and the process ID of the new process to the old process.  */
+extern __pid_t vfork __P ((void));
+#endif /* Use BSD. */
+
+
+/* Return the pathname of the terminal FD is open on, or NULL on errors.
+   The returned storage is good only until the next call to this function.  */
+extern char *ttyname __P ((int __fd));
+
+/* Store at most BUFLEN characters of the pathname of the terminal FD is
+   open on in BUF.  Return 0 on success, otherwise an error number.  */
+extern int ttyname_r __P ((int __fd, char *__buf, size_t __buflen));
+
+/* Return 1 if FD is a valid descriptor associated
+   with a terminal, zero if not.  */
+extern int isatty __P ((int __fd));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Return the index into the active-logins file (utmp) for
+   the controlling terminal.  */
+extern int ttyslot __P ((void));
+#endif
+
+
+/* Make a link to FROM named TO.  */
+extern int link __P ((__const char *__from, __const char *__to));
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+/* Make a symbolic link to FROM named TO.  */
+extern int symlink __P ((__const char *__from, __const char *__to));
+
+/* Read the contents of the symbolic link PATH into no more than
+   LEN bytes of BUF.  The contents are not null-terminated.
+   Returns the number of characters read, or -1 for errors.  */
+extern int readlink __P ((__const char *__path, char *__buf, size_t __len));
+#endif /* Use BSD.  */
+
+/* Remove the link NAME.  */
+extern int unlink __P ((__const char *__name));
+
+/* Remove the directory PATH.  */
+extern int rmdir __P ((__const char *__path));
+
 
 /* Return the foreground process group ID of FD.  */
 extern __pid_t tcgetpgrp __P ((int __fd));
+
 /* Set the foreground process group ID of FD set PGRP_ID.  */
 extern int tcsetpgrp __P ((int __fd, __pid_t __pgrp_id));
 
-/* Get the process group ID of the calling process.
-   This function is different on old BSD. */
-extern __pid_t getpgrp __P ((void));
-/* Set the process group ID of the process matching PID to PGID.
-   If PID is zero, the current process's process group ID is set.
-   If PGID is zero, the process ID of the process is used.  */
-extern int setpgid __P ((__pid_t __pid, __pid_t __pgid));
 
-/* Get the process ID of the calling process.  */
-extern __pid_t getpid __P ((void));
+/* Return the login name of the user.  */
+extern char *getlogin __P ((void));
+#ifdef __USE_REENTRANT
+/* Return at most NAME_LEN characters of the login name of the user in NAME.
+   If it cannot be determined or some other error occurred, return the error
+   code.  Otherwise return 0.  */
+extern int getlogin_r __P ((char *__name, size_t __name_len));
+#endif
+
+#ifdef	__USE_BSD
+/* Set the login name returned by `getlogin'.  */
+extern int setlogin __P ((__const char *__name));
+#endif
+
+
+#ifdef	__USE_POSIX2
+/* Get definitions and prototypes for functions to process the
+   arguments in ARGV (ARGC of them, minus the program name) for
+   options given in OPTS.  */
+# define __need_getopt
+# include <getopt.h>
+#endif
+
+
+#if defined __USE_BSD || defined __USE_XOPEN
+
+/* Put the name of the current host in no more than LEN bytes of NAME.
+   The result is null-terminated if LEN is large enough for the full
+   name and the terminator.  */
+extern int gethostname __P ((char *__name, size_t __len));
+
+/* Set the name of the current host to NAME, which is LEN bytes long.
+   This call is restricted to the super-user.  */
+extern int sethostname __P ((__const char *__name, size_t __len));
+
+/* Set the current machine's Internet number to ID.
+   This call is restricted to the super-user.  */
+extern int sethostid __P ((long int __id));
+
+
+/* Get and set the NIS (aka YP) domain name, if any.
+   Called just like `gethostname' and `sethostname'.
+   The NIS domain name is usually the empty string when not using NIS.  */
+extern int getdomainname __P ((char *__name, size_t __len));
+extern int setdomainname __P ((__const char *__name, size_t __len));
+
+
+/* Make all changes done to FD actually appear on disk.  */
+extern int fsync __P ((int __fd));
 
 
+/* Revoke access permissions to all processes currently communicating
+   with the control terminal, and then send a SIGHUP signal to the process
+   group of the control terminal.  */
+extern int vhangup __P ((void));
 
+/* Revoke the access of all descriptors currently open on FILE.  */
+extern int revoke __P ((__const char *__file));
+
+
+/* Enable statistical profiling, writing samples of the PC into at most
+   SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
+   is enabled, the system examines the user PC and increments
+   SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536].  If SCALE is zero,
+   disable profiling.  Returns zero on success, -1 on error.  */
+extern int profil __P ((unsigned short int *__sample_buffer, size_t __size,
+			size_t __offset, unsigned int __scale));
+
+
+/* Turn accounting on if NAME is an existing file.  The system will then write
+   a record for each process as it terminates, to this file.  If NAME is NULL,
+   turn accounting off.  This call is restricted to the super-user.  */
+extern int acct __P ((__const char *__name));
 
 /* Make PATH be the root directory (the starting point for absolute paths).
    This call is restricted to the super-user.  */
 extern int chroot __P ((__const char *__path));
 
-/* Execute PATH with all arguments after PATH until
-   a NULL pointer and environment from `environ'.  */
-extern int execl __P ((__const char *__path, __const char *__arg, ...));
 
-/* Execute FILE, searching in the `PATH' environment variable if
-   it contains no slashes, with all arguments after FILE until a
-   NULL pointer and environment from `environ'.  */
-extern int execlp __P ((__const char *__file, __const char *__arg, ...));
+/* Successive calls return the shells listed in `/etc/shells'.  */
+extern char *getusershell __P ((void));
+extern void endusershell __P ((void)); /* Discard cached info.  */
+extern void setusershell __P ((void)); /* Rewind and re-read the file.  */
 
-/* Execute PATH with arguments ARGV and environment from `environ'.  */
-extern int execv __P ((__const char *__path, char *__const __argv[]));
 
-/* Replace the current process, executing PATH with arguments ARGV and
-   environment ENVP.  ARGV and ENVP are terminated by NULL pointers.  */
-extern int execve __P ((__const char *__path, char *__const __argv[],
-			char *__const __envp[]));
-/* Execute FILE, searching in the `PATH' environment variable if it contains
-   no slashes, with arguments ARGV and environment from `environ'.  */
-extern int execvp __P ((__const char *__file, char *__const __argv[]));
+/* Prompt with PROMPT and read a string from the terminal without echoing.
+   Uses /dev/tty if possible; otherwise stderr and stdin.  */
+extern char *getpass __P ((__const char *__prompt));
 
+/* Put the program in the background, and dissociate from the controlling
+   terminal.  If NOCHDIR is zero, do `chdir ("/")'.  If NOCLOSE is zero,
+   redirects stdin, stdout, and stderr to /dev/null.  */
+extern int daemon __P ((int __nochdir, int __noclose));
 
-/* Execute PATH with arguments ARGV and environment ENVP. */
-extern int execvep __P ((__const char *path, char *__const __argv[], 
-	    char *__const __envp[]));
+#endif /* Use BSD || X/Open.  */
 
-/* Terminate program execution with the low-order 8 bits of STATUS.  */
-extern void _exit __P ((int __status)) __attribute__ ((__noreturn__));
 
-/* Clone the calling process, creating an exact copy.
- *    Return -1 for errors, 0 to the new process,
- *       and the process ID of the new process to the old process.  */
-extern __pid_t fork __P ((void));
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+
+/* Return the current machine's Internet number.  */
+extern long int gethostid __P ((void));
+
+/* Make all changes done to all files actually appear on disk.  */
+extern int sync __P ((void));
 
-/* Clone the calling process, but without copying the whole address space.
- *    The calling process is suspended until the new process exits or is
- *       replaced by a call to `execve'.  Return -1 for errors, 0 to the new process,
- *          and the process ID of the new process to the old process.  */
-extern __pid_t vfork __P ((void));
 
 /* Return the number of bytes in a page.  This is the system's page size,
    which is not necessarily the same as the hardware page size.  */
+extern int __getpagesize __P ((void)) __attribute__ ((__const__));
 extern int getpagesize __P ((void)) __attribute__ ((__const__));
 
-extern int truncate __P ((const char *path, off_t length));
-extern int ftruncate __P ((int fd, off_t length));
 
+/* Truncate FILE to LENGTH bytes.  */
+#ifndef __USE_FILE_OFFSET64
+extern int truncate __P ((__const char *__file, __off_t __length));
+#else
+# ifdef __REDIRECT
+extern int __REDIRECT (truncate,
+		       __P ((__const char *__file, __off64_t __length)),
+		       truncate64);
+# else
+#  define truncate truncate64
+# endif
+#endif
+#ifdef __USE_LARGEFILE64
+extern int truncate64 __P ((__const char *__file, __off64_t __length));
+#endif
+
+/* Truncate the file FD is open on to LENGTH bytes.  */
+extern int __ftruncate __P ((int __fd, __off_t __length));
+#ifndef __USE_FILE_OFFSET64
+extern int ftruncate __P ((int __fd, __off_t __length));
+#else
+# ifdef __REDIRECT
+extern int __REDIRECT (ftruncate, __P ((int __fd, __off64_t __length)),
+		       ftruncate64);
+# else
+#  define ftruncate ftruncate64
+# endif
+#endif
+#ifdef __USE_LARGEFILE64
+extern int ftruncate64 __P ((int __fd, __off64_t __length));
+#endif
+
+
+/* Return the maximum number of file descriptors
+   the current process could possibly have.  */
+extern int getdtablesize __P ((void));
+
+#endif /* Use BSD || X/Open Unix.  */
+
+
+#if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
+
+/* Set the end of accessible data space (aka "the break") to ADDR.
+   Returns zero on success and -1 for errors (with errno set).  */
+extern int brk __P ((__ptr_t __addr));
+
+# define __need_ptrdiff_t
+# include <stddef.h>
+
+/* Increase or decrease the end of accessible data space by DELTA bytes.
+   If successful, returns the address the previous end of data space
+   (i.e. the beginning of the new space, if DELTA > 0);
+   returns (void *) -1 for errors (with errno set).  */
+extern __ptr_t __sbrk __P ((ptrdiff_t __delta));
+extern __ptr_t sbrk __P ((ptrdiff_t __delta));
+#endif
+
+
+#ifdef __USE_MISC
+/* Invoke `system call' number SYSNO, passing it the remaining arguments.
+   This is completely system-dependent, and not often useful.
+
+   In Unix, `syscall' sets `errno' for all errors and most calls return -1
+   for errors; in many systems you cannot pass arguments or get return
+   values for all system calls (`pipe', `fork', and `getppid' typically
+   among them).
+
+   In Mach, all system calls take normal arguments and always return an
+   error code (zero for success).  */
+extern long int syscall __P ((long int __sysno, ...));
+
+#endif	/* Use misc.  */
+
+
+#if (defined __USE_MISC || defined __USE_XOPEN_EXTENDED) && !defined F_LOCK
+/* NOTE: These declarations also appear in <fcntl.h>; be sure to keep both
+   files consistent.  Some systems have them there and some here, and some
+   software depends on the macros being defined without including both.  */
+
+/* `lockf' is a simpler interface to the locking facilities of `fcntl'.
+   LEN is always relative to the current file position.
+   The CMD argument is one of the following.  */
+
+# define F_ULOCK 0	/* Unlock a previously locked region.  */
+# define F_LOCK  1	/* Lock a region for exclusive use.  */
+# define F_TLOCK 2	/* Test and lock a region for exclusive use.  */
+# define F_TEST  3	/* Test a region for other processes locks.  */
+
+# ifndef __USE_FILE_OFFSET64
+extern int lockf __P ((int __fd, int __cmd, __off_t __len));
+# else
+#  ifdef __REDIRECT
+extern int __REDIRECT (lockf, __P ((int __fd, int __cmd, __off64_t __len)),
+		       lockf64);
+#  else
+#   define lockf lockf64
+#  endif
+# endif
+# ifdef __USE_LARGEFILE64
+extern int lockf64 __P ((int __fd, int __cmd, __off64_t __len));
+# endif
+#endif /* Use misc and F_LOCK not already defined.  */
+
+
+#ifdef __USE_GNU
+
+/* Evaluate EXPRESSION, and repeat as long as it returns -1 with `errno'
+   set to EINTR.  */
+
+# define TEMP_FAILURE_RETRY(expression) \
+  (__extension__							      \
+    ({ long int __result;						      \
+       do __result = (long int) (expression);				      \
+       while (__result == -1L && errno == EINTR);			      \
+       __result; }))							      \
+
+
+/* This variable is set nonzero at startup if the process's effective
+   IDs differ from its real IDs, or it is otherwise indicated that
+   extra security should be used.  When this is set the dynamic linker
+   and some functions contained in the C library ignore various
+   environment variables that normally affect them.  */
+extern int __libc_enable_secure;
 
-#ifdef	__USE_POSIX2
-/* Get definitions and prototypes for functions to process the
-   arguments in ARGV (ARGC of them, minus the program name) for
-   options given in OPTS.  */
-# define __need_getopt
-# include <getopt.h>
 #endif
 
+#if defined __USE_POSIX199309 || defined __USE_UNIX98
+/* Synchronize at least the data part of a file with the underlying
+   media.  */
+extern int fdatasync __P ((int __fildes));
+#endif /* Use POSIX199309 */
+
+
+/* XPG4.2 specifies that prototypes for the encryption functions must
+   be defined here.  */
+#ifdef	__USE_XOPEN
+/* Encrypt at most 8 characters from KEY using salt to perturb DES.  */
+extern char *crypt __P ((__const char *__key, __const char *__salt));
+
+/* Setup DES tables according KEY.  */
+extern void setkey __P ((__const char *__key));
+
+/* Encrypt data in BLOCK in place if EDFLAG is zero; otherwise decrypt
+   block in place.  */
+extern void encrypt __P ((char *__block, int __edflag));
 
-#ifndef SEEK_SET
-#define SEEK_SET 0
-#define SEEK_CUR 1
-#define SEEK_END 2
+
+/* Swab pairs bytes in the first N bytes of the area pointed to by
+   FROM and copy the result to TO.  The value of TO must not be in the
+   range [FROM - N + 1, FROM - 1].  If N is odd the first byte in FROM
+   is without partner.  */
+extern void swab __P ((__const __ptr_t __from, __ptr_t __to, ssize_t __n));
 #endif
 
-#ifndef R_OK
-#define	R_OK	4		/* Test for read permission.  */
-#define	W_OK	2		/* Test for write permission.  */
-#define	X_OK	1		/* Test for execute permission.  */
-#define	F_OK	0		/* Test for existence.  */
+
+/* The Single Unix specification, version 2, demands these prototypes
+   to be here.  They are also found in <stdio.h>.  */
+#ifdef __USE_XOPEN
+/* Return the name of the controlling terminal.  */
+extern char *ctermid __P ((char *__s));
+
+/* Return the name of the current user.  This function should not be
+   used and might go away some time.  */
+extern char *cuserid __P ((char *__s));
+
+/* Rename file OLD to NEW.  */
+extern int rename __P ((__const char *__old, __const char *__new));
 #endif
 
-#endif /* __UNISTD_H */
 
+#ifdef __USE_POSIX199309
+/* This function is only available if the system has POSIX threads.  */
+
+/* Install handlers to be called when a new process is created with FORK.
+   The PREPARE handler is called in the parent process just before performing
+   FORK. The PARENT handler is called in the parent process just after FORK.
+   The CHILD handler is called in the child process.  Each of the three
+   handlers can be NULL, meaning that no handler needs to be called at that
+   point.
+   PTHREAD_ATFORK can be called several times, in which case the PREPARE
+   handlers are called in LIFO order (last added with PTHREAD_ATFORK,
+   first called before FORK), and the PARENT and CHILD handlers are called
+   in FIFO (first added, first called). */
+extern int pthread_atfork __P ((void (*__prepare) (void),
+				void (*__parent) (void),
+				void (*__child) (void)));
+#endif
+
+__END_DECLS
 
+#endif /* unistd.h  */
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index ae23064bb..7b367ed4c 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -689,12 +689,12 @@ int resolve_mailbox(const char *address,
 #endif
 
 extern int nameservers;
-extern const char *__const nameserver[3];
+extern const char *nameserver[3];
 
 #ifdef L_opennameservers
 
 int nameservers;
-const char *__const nameserver[3];
+const char * nameserver[3];
 
 int open_nameservers()
 {
diff --git a/libc/misc/Makefile b/libc/misc/Makefile
index 7ff8da188..dcd40319c 100644
--- a/libc/misc/Makefile
+++ b/libc/misc/Makefile
@@ -20,12 +20,12 @@
 # other sundry sources.  Files within this library are copyright by their
 # respective copyright holders.
 
+TOPDIR=../
+include $(TOPDIR)Rules.mak
+LIBC=$(TOPDIR)libc.a
 
-DIRS = assert crypt fnmatch glob internals lsearch mntent syslog regex shm time
 
-ifeq ($(USE_CTYPE_C_FUNCTIONS),true)
-    DIRS+=ctype
-endif
+DIRS = assert crypt ctype fnmatch glob internals lsearch mntent syslog regex shm time
 
 all: libc.a
 
diff --git a/libc/misc/ctype/ctype.c b/libc/misc/ctype/ctype.c
index 78e1f8891..1063f443d 100644
--- a/libc/misc/ctype/ctype.c
+++ b/libc/misc/ctype/ctype.c
@@ -6,6 +6,7 @@
  * under the GNU Library General Public License.
  */
 
+#define USE_CTYPE_C_FUNCTIONS
 #include <ctype.h>
 
 int
diff --git a/libc/misc/lock/.indent.pro b/libc/misc/lock/.indent.pro
new file mode 100644
index 000000000..492ecf1c7
--- /dev/null
+++ b/libc/misc/lock/.indent.pro
@@ -0,0 +1,33 @@
+--blank-lines-after-declarations
+--blank-lines-after-procedures
+--break-before-boolean-operator
+--no-blank-lines-after-commas
+--braces-on-if-line
+--braces-on-struct-decl-line
+--comment-indentation25
+--declaration-comment-column25
+--no-comment-delimiters-on-blank-lines
+--cuddle-else
+--continuation-indentation4
+--case-indentation0
+--else-endif-column33
+--space-after-cast
+--line-comments-indentation0
+--declaration-indentation1
+--dont-format-first-column-comments
+--dont-format-comments
+--honour-newlines
+--indent-level4
+/* changed from 0 to 4 */
+--parameter-indentation4
+--line-length78 /* changed from 75 */
+--continue-at-parentheses
+--no-space-after-function-call-names
+--dont-break-procedure-type
+--dont-star-comments
+--leave-optional-blank-lines
+--dont-space-special-semicolon
+--tab-size4
+/* additions by Mark */
+--case-brace-indentation0
+--leave-preprocessor-space
diff --git a/libc/misc/lock/Makefile b/libc/misc/lock/Makefile
new file mode 100644
index 000000000..e319c11df
--- /dev/null
+++ b/libc/misc/lock/Makefile
@@ -0,0 +1,44 @@
+# Makefile for uCLibc
+#
+# Copyright (C) 2000 by Lineo, inc.
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Library General Public License as published by the Free
+# Software Foundation; either version 2 of the License, or (at your option) any
+# later version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
+# Place, Suite 330, Boston, MA 02111-1307 USA
+#
+# Derived in part from the Linux-8086 C library, the GNU C Library, and several
+# other sundry sources.  Files within this library are copyright by their
+# respective copyright holders.
+
+TOPDIR=../../
+include $(TOPDIR)Rules.mak
+LIBC=$(TOPDIR)libc.a
+
+CSRC=flock.c
+COBJS=$(patsubst %.c,%.o, $(CSRC))
+OBJS=$(COBJS)
+
+all: $(OBJS) $(LIBC)
+
+$(LIBC): ar-target
+
+ar-target: $(OBJS)
+	$(AR) $(ARFLAGS) $(LIBC) $(OBJS)
+
+$(COBJS):
+	$(CC) $(CFLAGS) $< -c $*.c -o $*.o
+	$(STRIPTOOL) -x -R .note -R .comment $*.o
+
+clean:
+	rm -f *.[oa] *~ core
+
diff --git a/libc/misc/lock/flock.c b/libc/misc/lock/flock.c
new file mode 100644
index 000000000..3c1264655
--- /dev/null
+++ b/libc/misc/lock/flock.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1992, 1995, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/* This file implements the `flock' function in terms of the POSIX.1 `fcntl'
+   locking mechanism.  In 4BSD, these are two incompatible locking mechanisms,
+   perhaps with different semantics?  */
+
+#include <errno.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/file.h>
+
+/* Apply or remove an advisory lock, according to OPERATION,
+   on the file FD refers to.  */
+int flock( int fd, int operation)
+{
+	struct flock lbuf;
+
+	switch (operation & ~LOCK_NB) {
+	case LOCK_SH:
+		lbuf.l_type = F_RDLCK;
+		break;
+	case LOCK_EX:
+		lbuf.l_type = F_WRLCK;
+		break;
+	case LOCK_UN:
+		lbuf.l_type = F_UNLCK;
+		break;
+	default:
+		errno = EINVAL;
+		return -1;
+	}
+
+	lbuf.l_whence = SEEK_SET;
+	lbuf.l_start = lbuf.l_len = 0L;	/* Lock the whole file.  */
+
+	return fcntl(fd, (operation & LOCK_NB) ? F_SETLK : F_SETLKW, &lbuf);
+}
+
diff --git a/libc/misc/time/Makefile b/libc/misc/time/Makefile
index 0d24f43e4..70ee192c4 100644
--- a/libc/misc/time/Makefile
+++ b/libc/misc/time/Makefile
@@ -26,7 +26,7 @@ LIBC=$(TOPDIR)libc.a
 
 CSRC=localtime.c gmtime.c asctime.c ctime.c asc_conv.c tm_conv.c mktime.c \
 	localtime_r.c gmtime_r.c asctime_r.c ctime_r.c utimes.c adjtime.c \
-	strftime.c
+	strftime.c clock.c times.c difftime.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 OBJS=$(COBJS)
 
diff --git a/libc/misc/time/clock.c b/libc/misc/time/clock.c
new file mode 100644
index 000000000..4d1a17869
--- /dev/null
+++ b/libc/misc/time/clock.c
@@ -0,0 +1,45 @@
+/* Copyright (C) 1991, 1992, 1996, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <sys/times.h>
+#include <time.h>
+#include <unistd.h>
+
+/* Return the time used by the program so far (user time + system time).  */
+clock_t
+clock (void)
+{
+  struct tms buf;
+  long clk_tck = sysconf (_SC_CLK_TCK);
+
+  /* We don't check for errors here.  The only error the kernel
+     returns is EFAULT if the value cannot be written to the struct we
+     pass a pointer to.  Otherwise the kernel returns an `unsigned
+     long' value which is the number of jiffies since system start.
+     But this number can be negative (when read as `long') when the
+     system is up for some time.  Ignoring errors should therefore
+     have no negative impacts but solve the problem.  */
+  times (&buf);
+
+  return
+    (clk_tck <= CLOCKS_PER_SEC)
+    ? ((unsigned long) buf.tms_utime + buf.tms_stime) * (CLOCKS_PER_SEC
+							 / clk_tck)
+    : ((unsigned long) buf.tms_utime + buf.tms_stime) / (clk_tck
+							 / CLOCKS_PER_SEC);
+}
diff --git a/libc/misc/time/difftime.c b/libc/misc/time/difftime.c
new file mode 100644
index 000000000..6a9b708ea
--- /dev/null
+++ b/libc/misc/time/difftime.c
@@ -0,0 +1,67 @@
+/* Copyright (C) 1991, 1994, 1996 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <time.h>
+#include <limits.h>
+#include <sys/types.h>
+
+
+/* Return the difference between TIME1 and TIME0.  */
+double
+difftime (time1, time0)
+     time_t time1;
+     time_t time0;
+{
+  /* Algorithm courtesy Paul Eggert (eggert@twinsun.com).  */
+
+  time_t delta, hibit;
+
+  if (sizeof (time_t) < sizeof (double))
+    return (double) time1 - (double) time0;
+  if (sizeof (time_t) < sizeof (long double))
+    return (long double) time1 - (long double) time0;
+
+  if (time1 < time0)
+    return - difftime (time0, time1);
+
+  /* As much as possible, avoid loss of precision by computing the
+    difference before converting to double.  */
+  delta = time1 - time0;
+  if (delta >= 0)
+    return delta;
+
+  /* Repair delta overflow.  */
+  hibit = (~ (time_t) 0) << ((sizeof (time_t) * CHAR_BIT) - 1);
+
+  /* The following expression rounds twice, which means the result may not
+     be the closest to the true answer.  For example, suppose time_t is
+     64-bit signed int, long_double is IEEE 754 double with default
+     rounding, time1 = 9223372036854775807 and time0 = -1536.  Then the
+     true difference is 9223372036854777343, which rounds to
+     9223372036854777856 with a total error of 513.  But delta overflows to
+     -9223372036854774273, which rounds to -9223372036854774784, and
+     correcting this by subtracting 2 * (long_double) hibit (i.e. by adding
+     2**64 = 18446744073709551616) yields 9223372036854776832, which rounds
+     to 9223372036854775808 with a total error of 1535 instead.  This
+     problem occurs only with very large differences.  It's too painful to
+     fix this portably.  We are not alone in this problem; many C compilers
+     round twice when converting large unsigned types to small floating
+     types, so if time_t is unsigned the "return delta" above has the same
+     double-rounding problem.  */
+  return delta - 2 * (long double) hibit;
+}
diff --git a/libc/pwd_grp/Makefile b/libc/pwd_grp/Makefile
index 5b5218c27..cc0ff909a 100644
--- a/libc/pwd_grp/Makefile
+++ b/libc/pwd_grp/Makefile
@@ -26,7 +26,7 @@ LIBC=$(TOPDIR)libc.a
 
 CSRC=__getpwent.c pwent.c getpwnam.c getpwuid.c putpwent.c getpw.c fgetpwent.c \
 	__getgrent.c grent.c getgrnam.c getgrgid.c fgetgrent.c initgroups.c \
-	utent.c
+	utent.c getpass.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 OBJS=$(COBJS)
 
diff --git a/libc/signal/Makefile b/libc/signal/Makefile
index 5de28d7f0..8d21168a1 100644
--- a/libc/signal/Makefile
+++ b/libc/signal/Makefile
@@ -25,8 +25,7 @@ include $(TOPDIR)Rules.mak
 LIBC=$(TOPDIR)libc.a
 
 CSRC=bsd_sig.c raise.c sigblock.c siggtmsk.c sigjmp.c signal.c \
-	sigpause.c sigstmsk.c sigaddset.c sigdelset.c \
-	sigismem.c sigemptyset.c
+	sigpause.c sigstmsk.c sigaddset.c sigdelset.c sigismem.c sigemptyset.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 OBJS=$(COBJS)
diff --git a/libc/signal/sigaddset.c b/libc/signal/sigaddset.c
index e6848a76d..ec1c96e9b 100644
--- a/libc/signal/sigaddset.c
+++ b/libc/signal/sigaddset.c
@@ -18,8 +18,6 @@
 
 #include <errno.h>
 #include <features.h>
-#define _EXTERN_INLINE
-#define __USE_EXTERN_INLINES   1
 #include "signal.h"
 
 
diff --git a/libc/signal/sigdelset.c b/libc/signal/sigdelset.c
index 6206e7d39..daa545624 100644
--- a/libc/signal/sigdelset.c
+++ b/libc/signal/sigdelset.c
@@ -17,8 +17,6 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "errno.h"
-#define _EXTERN_INLINE
-#define __USE_EXTERN_INLINES   1
 #include "signal.h"
 
 /* Add SIGNO to SET.  */
diff --git a/libc/stdio/getdelim.c b/libc/stdio/getdelim.c
index 99d48bb32..f8341cb0d 100644
--- a/libc/stdio/getdelim.c
+++ b/libc/stdio/getdelim.c
@@ -58,13 +58,13 @@ size_t getdelim(char **linebuf, size_t *linebufsz, int delimiter, FILE *file)
 				return -1;
 			}
 		}
-		*linebuf[idx++] = (char)ch;
+		(*linebuf)[idx++] = (char)ch;
 		if ((char)ch == delimiter)
 			break;
 	}
 
 	if (idx != 0)
-	    *linebuf[idx] = 0;
+	    (*linebuf)[idx] = 0;
 	return idx;
 }
 
diff --git a/libc/stdlib/malloc/malloc.c b/libc/stdlib/malloc/malloc.c
index 88d8698b2..d7df5d243 100644
--- a/libc/stdlib/malloc/malloc.c
+++ b/libc/stdlib/malloc/malloc.c
@@ -101,13 +101,12 @@ typedef int mutex_t;
 #define mutex_unlock(x)
 #define mutex_init(x)
 #define MUTEX_INITIALIZER 0
+//static mutex_t malloc_lock = MUTEX_INITIALIZER;
 #endif
 
 static int mmalloc_initialized = -1;
  /* -1 == uninitialized, 0 == initializing, 1 == initialized */
 
-static mutex_t malloc_lock = MUTEX_INITIALIZER;
-
 #ifndef MAP_FAILED
 #define MAP_FAILED ((void*)-1)
 #endif
diff --git a/libc/string/strsignal.c b/libc/string/strsignal.c
index 83a862bfb..91895a8ae 100644
--- a/libc/string/strsignal.c
+++ b/libc/string/strsignal.c
@@ -8,6 +8,8 @@
 #include <malloc.h>
 #include <signal.h>
 
+extern char *itoa(int i);
+
 const char *const sys_siglist[] = {
 	"Unknown signal",
 	"Hangup",
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index 0c361ba48..8d2b93830 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -29,7 +29,8 @@ LIBC=$(TOPDIR)libc.a
 CSRC =closedir.o dirfd.o getdents.o getdnnm.o gethstnm.o getpagesize.o \
 	isatty.o kernel_version.o mkfifo.o opendir.o readdir.o rewinddir.o \
 	seekdir.o setegid.o seteuid.o setpgrp.o statfix.o tcgetatr.o tell.o \
-	telldir.o wait.o wait3.o _xmknod.o _fxstat.o _lxstat.o _xstat.o
+	telldir.o wait.o wait3.o _xmknod.o _fxstat.o _lxstat.o _xstat.o \
+	libc_init.o
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 
 
diff --git a/libc/sysdeps/linux/common/syscalls.c b/libc/sysdeps/linux/common/syscalls.c
index c7d4343be..6b18c356d 100644
--- a/libc/sysdeps/linux/common/syscalls.c
+++ b/libc/sysdeps/linux/common/syscalls.c
@@ -44,13 +44,13 @@ _syscall0(pid_t, fork);
 //#define __NR_read             3
 #ifdef L_read
 #include <unistd.h>
-_syscall3(size_t, read, int, fd, char *, buf, size_t, count);
+_syscall3(ssize_t, read, int, fd, __ptr_t, buf, size_t, count);
 #endif
 
 //#define __NR_write            4
 #ifdef L_write
 #include <unistd.h>
-_syscall3(size_t, write, int, fd, const char *, buf, size_t, count);
+_syscall3(ssize_t, write, int, fd, const __ptr_t, buf, size_t, count);
 #endif
 
 //#define __NR_open             5
diff --git a/libc/sysdeps/linux/i386/bits/confname.h b/libc/sysdeps/linux/i386/bits/confname.h
new file mode 100644
index 000000000..229088d67
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bits/confname.h
@@ -0,0 +1,408 @@
+/* `sysconf', `pathconf', and `confstr' NAME values.  Generic version.
+   Copyright (C) 1993, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef _UNISTD_H
+# error "Never use <bits/confname.h> directly; include <unistd.h> instead."
+#endif
+
+/* Values for the NAME argument to `pathconf' and `fpathconf'.  */
+enum
+  {
+    _PC_LINK_MAX,
+#define	_PC_LINK_MAX			_PC_LINK_MAX
+    _PC_MAX_CANON,
+#define	_PC_MAX_CANON			_PC_MAX_CANON
+    _PC_MAX_INPUT,
+#define	_PC_MAX_INPUT			_PC_MAX_INPUT
+    _PC_NAME_MAX,
+#define	_PC_NAME_MAX			_PC_NAME_MAX
+    _PC_PATH_MAX,
+#define	_PC_PATH_MAX			_PC_PATH_MAX
+    _PC_PIPE_BUF,
+#define	_PC_PIPE_BUF			_PC_PIPE_BUF
+    _PC_CHOWN_RESTRICTED,
+#define	_PC_CHOWN_RESTRICTED		_PC_CHOWN_RESTRICTED
+    _PC_NO_TRUNC,
+#define	_PC_NO_TRUNC			_PC_NO_TRUNC
+    _PC_VDISABLE,
+#define _PC_VDISABLE			_PC_VDISABLE
+    _PC_SYNC_IO,
+#define	_PC_SYNC_IO			_PC_SYNC_IO
+    _PC_ASYNC_IO,
+#define	_PC_ASYNC_IO			_PC_ASYNC_IO
+    _PC_PRIO_IO,
+#define	_PC_PRIO_IO			_PC_PRIO_IO
+    _PC_SOCK_MAXBUF,
+#define	_PC_SOCK_MAXBUF			_PC_SOCK_MAXBUF
+    _PC_FILESIZEBITS
+#define _PC_FILESIZEBITS		_PC_FILESIZEBITS
+  };
+
+/* Values for the argument to `sysconf'.  */
+enum
+  {
+    _SC_ARG_MAX,
+#define	_SC_ARG_MAX			_SC_ARG_MAX
+    _SC_CHILD_MAX,
+#define	_SC_CHILD_MAX			_SC_CHILD_MAX
+    _SC_CLK_TCK,
+#define	_SC_CLK_TCK			_SC_CLK_TCK
+    _SC_NGROUPS_MAX,
+#define	_SC_NGROUPS_MAX			_SC_NGROUPS_MAX
+    _SC_OPEN_MAX,
+#define	_SC_OPEN_MAX			_SC_OPEN_MAX
+    _SC_STREAM_MAX,
+#define	_SC_STREAM_MAX			_SC_STREAM_MAX
+    _SC_TZNAME_MAX,
+#define	_SC_TZNAME_MAX			_SC_TZNAME_MAX
+    _SC_JOB_CONTROL,
+#define	_SC_JOB_CONTROL			_SC_JOB_CONTROL
+    _SC_SAVED_IDS,
+#define	_SC_SAVED_IDS			_SC_SAVED_IDS
+    _SC_REALTIME_SIGNALS,
+#define	_SC_REALTIME_SIGNALS		_SC_REALTIME_SIGNALS
+    _SC_PRIORITY_SCHEDULING,
+#define	_SC_PRIORITY_SCHEDULING		_SC_PRIORITY_SCHEDULING
+    _SC_TIMERS,
+#define	_SC_TIMERS			_SC_TIMERS
+    _SC_ASYNCHRONOUS_IO,
+#define	_SC_ASYNCHRONOUS_IO		_SC_ASYNCHRONOUS_IO
+    _SC_PRIORITIZED_IO,
+#define	_SC_PRIORITIZED_IO		_SC_PRIORITIZED_IO
+    _SC_SYNCHRONIZED_IO,
+#define	_SC_SYNCHRONIZED_IO		_SC_SYNCHRONIZED_IO
+    _SC_FSYNC,
+#define	_SC_FSYNC			_SC_FSYNC
+    _SC_MAPPED_FILES,
+#define	_SC_MAPPED_FILES		_SC_MAPPED_FILES
+    _SC_MEMLOCK,
+#define	_SC_MEMLOCK			_SC_MEMLOCK
+    _SC_MEMLOCK_RANGE,
+#define	_SC_MEMLOCK_RANGE		_SC_MEMLOCK_RANGE
+    _SC_MEMORY_PROTECTION,
+#define	_SC_MEMORY_PROTECTION		_SC_MEMORY_PROTECTION
+    _SC_MESSAGE_PASSING,
+#define	_SC_MESSAGE_PASSING		_SC_MESSAGE_PASSING
+    _SC_SEMAPHORES,
+#define	_SC_SEMAPHORES			_SC_SEMAPHORES
+    _SC_SHARED_MEMORY_OBJECTS,
+#define	_SC_SHARED_MEMORY_OBJECTS	_SC_SHARED_MEMORY_OBJECTS
+    _SC_AIO_LISTIO_MAX,
+#define	_SC_AIO_LISTIO_MAX		_SC_AIO_LISTIO_MAX
+    _SC_AIO_MAX,
+#define	_SC_AIO_MAX			_SC_AIO_MAX
+    _SC_AIO_PRIO_DELTA_MAX,
+#define	_SC_AIO_PRIO_DELTA_MAX		_SC_AIO_PRIO_DELTA_MAX
+    _SC_DELAYTIMER_MAX,
+#define	_SC_DELAYTIMER_MAX		_SC_DELAYTIMER_MAX
+    _SC_MQ_OPEN_MAX,
+#define	_SC_MQ_OPEN_MAX			_SC_MQ_OPEN_MAX
+    _SC_MQ_PRIO_MAX,
+#define	_SC_MQ_PRIO_MAX			_SC_MQ_PRIO_MAX
+    _SC_VERSION,
+#define	_SC_VERSION			_SC_VERSION
+    _SC_PAGESIZE,
+#define	_SC_PAGESIZE			_SC_PAGESIZE
+#define	_SC_PAGE_SIZE			_SC_PAGESIZE
+    _SC_RTSIG_MAX,
+#define	_SC_RTSIG_MAX			_SC_RTSIG_MAX
+    _SC_SEM_NSEMS_MAX,
+#define	_SC_SEM_NSEMS_MAX		_SC_SEM_NSEMS_MAX
+    _SC_SEM_VALUE_MAX,
+#define	_SC_SEM_VALUE_MAX		_SC_SEM_VALUE_MAX
+    _SC_SIGQUEUE_MAX,
+#define	_SC_SIGQUEUE_MAX		_SC_SIGQUEUE_MAX
+    _SC_TIMER_MAX,
+#define	_SC_TIMER_MAX			_SC_TIMER_MAX
+
+    /* Values for the argument to `sysconf'
+       corresponding to _POSIX2_* symbols.  */
+    _SC_BC_BASE_MAX,
+#define	_SC_BC_BASE_MAX			_SC_BC_BASE_MAX
+    _SC_BC_DIM_MAX,
+#define	_SC_BC_DIM_MAX			_SC_BC_DIM_MAX
+    _SC_BC_SCALE_MAX,
+#define	_SC_BC_SCALE_MAX		_SC_BC_SCALE_MAX
+    _SC_BC_STRING_MAX,
+#define	_SC_BC_STRING_MAX		_SC_BC_STRING_MAX
+    _SC_COLL_WEIGHTS_MAX,
+#define	_SC_COLL_WEIGHTS_MAX		_SC_COLL_WEIGHTS_MAX
+    _SC_EQUIV_CLASS_MAX,
+#define	_SC_EQUIV_CLASS_MAX		_SC_EQUIV_CLASS_MAX
+    _SC_EXPR_NEST_MAX,
+#define	_SC_EXPR_NEST_MAX		_SC_EXPR_NEST_MAX
+    _SC_LINE_MAX,
+#define	_SC_LINE_MAX			_SC_LINE_MAX
+    _SC_RE_DUP_MAX,
+#define	_SC_RE_DUP_MAX			_SC_RE_DUP_MAX
+    _SC_CHARCLASS_NAME_MAX,
+#define	_SC_CHARCLASS_NAME_MAX		_SC_CHARCLASS_NAME_MAX
+
+    _SC_2_VERSION,
+#define	_SC_2_VERSION			_SC_2_VERSION
+    _SC_2_C_BIND,
+#define	_SC_2_C_BIND			_SC_2_C_BIND
+    _SC_2_C_DEV,
+#define	_SC_2_C_DEV			_SC_2_C_DEV
+    _SC_2_FORT_DEV,
+#define	_SC_2_FORT_DEV			_SC_2_FORT_DEV
+    _SC_2_FORT_RUN,
+#define	_SC_2_FORT_RUN			_SC_2_FORT_RUN
+    _SC_2_SW_DEV,
+#define	_SC_2_SW_DEV			_SC_2_SW_DEV
+    _SC_2_LOCALEDEF,
+#define	_SC_2_LOCALEDEF			_SC_2_LOCALEDEF
+
+    _SC_PII,
+#define	_SC_PII				_SC_PII
+    _SC_PII_XTI,
+#define	_SC_PII_XTI			_SC_PII_XTI
+    _SC_PII_SOCKET,
+#define	_SC_PII_SOCKET			_SC_PII_SOCKET
+    _SC_PII_INTERNET,
+#define	_SC_PII_INTERNET		_SC_PII_INTERNET
+    _SC_PII_OSI,
+#define	_SC_PII_OSI			_SC_PII_OSI
+    _SC_POLL,
+#define	_SC_POLL			_SC_POLL
+    _SC_SELECT,
+#define	_SC_SELECT			_SC_SELECT
+    _SC_UIO_MAXIOV,
+#define	_SC_UIO_MAXIOV			_SC_UIO_MAXIOV
+    _SC_PII_INTERNET_STREAM,
+#define	_SC_PII_INTERNET_STREAM		_SC_PII_INTERNET_STREAM
+    _SC_PII_INTERNET_DGRAM,
+#define	_SC_PII_INTERNET_DGRAM		_SC_PII_INTERNET_DGRAM
+    _SC_PII_OSI_COTS,
+#define	_SC_PII_OSI_COTS		_SC_PII_OSI_COTS
+    _SC_PII_OSI_CLTS,
+#define	_SC_PII_OSI_CLTS		_SC_PII_OSI_CLTS
+    _SC_PII_OSI_M,
+#define	_SC_PII_OSI_M			_SC_PII_OSI_M
+    _SC_T_IOV_MAX,
+#define	_SC_T_IOV_MAX			_SC_T_IOV_MAX
+
+    /* Values according to POSIX 1003.1c (POSIX threads).  */
+    _SC_THREADS,
+#define	_SC_THREADS			_SC_THREADS
+    _SC_THREAD_SAFE_FUNCTIONS,
+#define _SC_THREAD_SAFE_FUNCTIONS	_SC_THREAD_SAFE_FUNCTIONS
+    _SC_GETGR_R_SIZE_MAX,
+#define	_SC_GETGR_R_SIZE_MAX		_SC_GETGR_R_SIZE_MAX
+    _SC_GETPW_R_SIZE_MAX,
+#define	_SC_GETPW_R_SIZE_MAX		_SC_GETPW_R_SIZE_MAX
+    _SC_LOGIN_NAME_MAX,
+#define	_SC_LOGIN_NAME_MAX		_SC_LOGIN_NAME_MAX
+    _SC_TTY_NAME_MAX,
+#define	_SC_TTY_NAME_MAX		_SC_TTY_NAME_MAX
+    _SC_THREAD_DESTRUCTOR_ITERATIONS,
+#define	_SC_THREAD_DESTRUCTOR_ITERATIONS _SC_THREAD_DESTRUCTOR_ITERATIONS
+    _SC_THREAD_KEYS_MAX,
+#define	_SC_THREAD_KEYS_MAX		_SC_THREAD_KEYS_MAX
+    _SC_THREAD_STACK_MIN,
+#define	_SC_THREAD_STACK_MIN		_SC_THREAD_STACK_MIN
+    _SC_THREAD_THREADS_MAX,
+#define	_SC_THREAD_THREADS_MAX		_SC_THREAD_THREADS_MAX
+    _SC_THREAD_ATTR_STACKADDR,
+#define	_SC_THREAD_ATTR_STACKADDR	_SC_THREAD_ATTR_STACKADDR
+    _SC_THREAD_ATTR_STACKSIZE,
+#define	_SC_THREAD_ATTR_STACKSIZE	_SC_THREAD_ATTR_STACKSIZE
+    _SC_THREAD_PRIORITY_SCHEDULING,
+#define	_SC_THREAD_PRIORITY_SCHEDULING	_SC_THREAD_PRIORITY_SCHEDULING
+    _SC_THREAD_PRIO_INHERIT,
+#define	_SC_THREAD_PRIO_INHERIT		_SC_THREAD_PRIO_INHERIT
+    _SC_THREAD_PRIO_PROTECT,
+#define	_SC_THREAD_PRIO_PROTECT		_SC_THREAD_PRIO_PROTECT
+    _SC_THREAD_PROCESS_SHARED,
+#define	_SC_THREAD_PROCESS_SHARED	_SC_THREAD_PROCESS_SHARED
+
+    _SC_NPROCESSORS_CONF,
+#define _SC_NPROCESSORS_CONF		_SC_NPROCESSORS_CONF
+    _SC_NPROCESSORS_ONLN,
+#define _SC_NPROCESSORS_ONLN		_SC_NPROCESSORS_ONLN
+    _SC_PHYS_PAGES,
+#define _SC_PHYS_PAGES			_SC_PHYS_PAGES
+    _SC_AVPHYS_PAGES,
+#define _SC_AVPHYS_PAGES		_SC_AVPHYS_PAGES
+    _SC_ATEXIT_MAX,
+#define _SC_ATEXIT_MAX			_SC_ATEXIT_MAX
+    _SC_PASS_MAX,
+#define _SC_PASS_MAX			_SC_PASS_MAX
+
+    _SC_XOPEN_VERSION,
+#define _SC_XOPEN_VERSION		_SC_XOPEN_VERSION
+    _SC_XOPEN_XCU_VERSION,
+#define _SC_XOPEN_XCU_VERSION		_SC_XOPEN_XCU_VERSION
+    _SC_XOPEN_UNIX,
+#define _SC_XOPEN_UNIX			_SC_XOPEN_UNIX
+    _SC_XOPEN_CRYPT,
+#define _SC_XOPEN_CRYPT			_SC_XOPEN_CRYPT
+    _SC_XOPEN_ENH_I18N,
+#define _SC_XOPEN_ENH_I18N		_SC_XOPEN_ENH_I18N
+    _SC_XOPEN_SHM,
+#define _SC_XOPEN_SHM			_SC_XOPEN_SHM
+
+    _SC_2_CHAR_TERM,
+#define _SC_2_CHAR_TERM			_SC_2_CHAR_TERM
+    _SC_2_C_VERSION,
+#define _SC_2_C_VERSION			_SC_2_C_VERSION
+    _SC_2_UPE,
+#define _SC_2_UPE			_SC_2_UPE
+
+    _SC_XOPEN_XPG2,
+#define _SC_XOPEN_XPG2			_SC_XOPEN_XPG2
+    _SC_XOPEN_XPG3,
+#define _SC_XOPEN_XPG3			_SC_XOPEN_XPG3
+    _SC_XOPEN_XPG4,
+#define _SC_XOPEN_XPG4			_SC_XOPEN_XPG4
+
+    _SC_CHAR_BIT,
+#define	_SC_CHAR_BIT			_SC_CHAR_BIT
+    _SC_CHAR_MAX,
+#define	_SC_CHAR_MAX			_SC_CHAR_MAX
+    _SC_CHAR_MIN,
+#define	_SC_CHAR_MIN			_SC_CHAR_MIN
+    _SC_INT_MAX,
+#define	_SC_INT_MAX			_SC_INT_MAX
+    _SC_INT_MIN,
+#define	_SC_INT_MIN			_SC_INT_MIN
+    _SC_LONG_BIT,
+#define	_SC_LONG_BIT			_SC_LONG_BIT
+    _SC_WORD_BIT,
+#define	_SC_WORD_BIT			_SC_WORD_BIT
+    _SC_MB_LEN_MAX,
+#define	_SC_MB_LEN_MAX			_SC_MB_LEN_MAX
+    _SC_NZERO,
+#define	_SC_NZERO			_SC_NZERO
+    _SC_SSIZE_MAX,
+#define	_SC_SSIZE_MAX			_SC_SSIZE_MAX
+    _SC_SCHAR_MAX,
+#define	_SC_SCHAR_MAX			_SC_SCHAR_MAX
+    _SC_SCHAR_MIN,
+#define	_SC_SCHAR_MIN			_SC_SCHAR_MIN
+    _SC_SHRT_MAX,
+#define	_SC_SHRT_MAX			_SC_SHRT_MAX
+    _SC_SHRT_MIN,
+#define	_SC_SHRT_MIN			_SC_SHRT_MIN
+    _SC_UCHAR_MAX,
+#define	_SC_UCHAR_MAX			_SC_UCHAR_MAX
+    _SC_UINT_MAX,
+#define	_SC_UINT_MAX			_SC_UINT_MAX
+    _SC_ULONG_MAX,
+#define	_SC_ULONG_MAX			_SC_ULONG_MAX
+    _SC_USHRT_MAX,
+#define	_SC_USHRT_MAX			_SC_USHRT_MAX
+
+    _SC_NL_ARGMAX,
+#define	_SC_NL_ARGMAX			_SC_NL_ARGMAX
+    _SC_NL_LANGMAX,
+#define	_SC_NL_LANGMAX			_SC_NL_LANGMAX
+    _SC_NL_MSGMAX,
+#define	_SC_NL_MSGMAX			_SC_NL_MSGMAX
+    _SC_NL_NMAX,
+#define	_SC_NL_NMAX			_SC_NL_NMAX
+    _SC_NL_SETMAX,
+#define	_SC_NL_SETMAX			_SC_NL_SETMAX
+    _SC_NL_TEXTMAX,
+#define	_SC_NL_TEXTMAX			_SC_NL_TEXTMAX
+
+    _SC_XBS5_ILP32_OFF32,
+#define _SC_XBS5_ILP32_OFF32		_SC_XBS5_ILP32_OFF32
+    _SC_XBS5_ILP32_OFFBIG,
+#define _SC_XBS5_ILP32_OFFBIG		_SC_XBS5_ILP32_OFFBIG
+    _SC_XBS5_LP64_OFF64,
+#define _SC_XBS5_LP64_OFF64		_SC_XBS5_LP64_OFF64
+    _SC_XBS5_LPBIG_OFFBIG,
+#define _SC_XBS5_LPBIG_OFFBIG		_SC_XBS5_LPBIG_OFFBIG
+
+    _SC_XOPEN_LEGACY,
+#define _SC_XOPEN_LEGACY		_SC_XOPEN_LEGACY
+    _SC_XOPEN_REALTIME,
+#define _SC_XOPEN_REALTIME		_SC_XOPEN_REALTIME
+    _SC_XOPEN_REALTIME_THREADS
+#define _SC_XOPEN_REALTIME_THREADS	_SC_XOPEN_REALTIME_THREADS
+  };
+
+#if (defined __USE_POSIX2 || defined __USE_UNIX98 \
+     || defined __USE_FILE_OFFSET64 || defined __USE_LARGEFILE64 \
+     || defined __USE_LARGEFILE)
+/* Values for the NAME argument to `confstr'.  */
+enum
+  {
+    _CS_PATH			/* The default search path.  */
+#define _CS_PATH		_CS_PATH
+
+#if (defined __USE_FILE_OFFSET64 || defined __USE_LARGEFILE64 \
+     || defined __USE_LARGEFILE)
+    ,
+    _CS_LFS_CFLAGS = 1000,
+# define _CS_LFS_CFLAGS		_CS_LFS_CFLAGS
+    _CS_LFS_LDFLAGS,
+# define _CS_LFS_LDFLAGS	_CS_LFS_LDFLAGS
+    _CS_LFS_LIBS,
+# define _CS_LFS_LIBS		_CS_LFS_LIBS
+    _CS_LFS_LINTFLAGS,
+# define _CS_LFS_LINTFLAGS	_CS_LFS_LINTFLAGS
+    _CS_LFS64_CFLAGS,
+# define _CS_LFS64_CFLAGS	_CS_LFS64_CFLAGS
+    _CS_LFS64_LDFLAGS,
+# define _CS_LFS64_LDFLAGS	_CS_LFS64_LDFLAGS
+    _CS_LFS64_LIBS,
+# define _CS_LFS64_LIBS		_CS_LFS64_LIBS
+    _CS_LFS64_LINTFLAGS
+# define _CS_LFS64_LINTFLAGS	_CS_LFS64_LINTFLAGS
+#endif
+
+#ifdef __USE_UNIX98
+    ,
+    _CS_XBS5_ILP32_OFF32_CFLAGS = 1100,
+# define _CS_XBS5_ILP32_OFF32_CFLAGS _CS_XBS5_ILP32_OFF32_CFLAGS
+    _CS_XBS5_ILP32_OFF32_LDFLAGS,
+# define _CS_XBS5_ILP32_OFF32_LDFLAGS _CS_XBS5_ILP32_OFF32_LDFLAGS
+    _CS_XBS5_ILP32_OFF32_LIBS,
+# define _CS_XBS5_ILP32_OFF32_LIBS _CS_XBS5_ILP32_OFF32_LIBS
+    _CS_XBS5_ILP32_OFF32_LINTFLAGS,
+# define _CS_XBS5_ILP32_OFF32_LINTFLAGS _CS_XBS5_ILP32_OFF32_LINTFLAGS
+    _CS_XBS5_ILP32_OFFBIG_CFLAGS,
+# define _CS_XBS5_ILP32_OFFBIG_CFLAGS _CS_XBS5_ILP32_OFFBIG_CFLAGS
+    _CS_XBS5_ILP32_OFFBIG_LDFLAGS,
+# define _CS_XBS5_ILP32_OFFBIG_LDFLAGS _CS_XBS5_ILP32_OFFBIG_LDFLAGS
+    _CS_XBS5_ILP32_OFFBIG_LIBS,
+# define _CS_XBS5_ILP32_OFFBIG_LIBS _CS_XBS5_ILP32_OFFBIG_LIBS
+    _CS_XBS5_ILP32_OFFBIG_LINTFLAGS,
+# define _CS_XBS5_ILP32_OFFBIG_LINTFLAGS _CS_XBS5_ILP32_OFFBIG_LINTFLAGS
+    _CS_XBS5_LP64_OFF64_CFLAGS,
+# define _CS_XBS5_LP64_OFF64_CFLAGS _CS_XBS5_LP64_OFF64_CFLAGS
+    _CS_XBS5_LP64_OFF64_LDFLAGS,
+# define _CS_XBS5_LP64_OFF64_LDFLAGS _CS_XBS5_LP64_OFF64_LDFLAGS
+    _CS_XBS5_LP64_OFF64_LIBS,
+# define _CS_XBS5_LP64_OFF64_LIBS _CS_XBS5_LP64_OFF64_LIBS
+    _CS_XBS5_LP64_OFF64_LINTFLAGS,
+# define _CS_XBS5_LP64_OFF64_LINTFLAGS _CS_XBS5_LP64_OFF64_LINTFLAGS
+    _CS_XBS5_LPBIG_OFFBIG_CFLAGS,
+# define _CS_XBS5_LPBIG_OFFBIG_CFLAGS _CS_XBS5_LPBIG_OFFBIG_CFLAGS
+    _CS_XBS5_LPBIG_OFFBIG_LDFLAGS,
+# define _CS_XBS5_LPBIG_OFFBIG_LDFLAGS _CS_XBS5_LPBIG_OFFBIG_LDFLAGS
+    _CS_XBS5_LPBIG_OFFBIG_LIBS,
+# define _CS_XBS5_LPBIG_OFFBIG_LIBS _CS_XBS5_LPBIG_OFFBIG_LIBS
+    _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS
+# define _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS _CS_XBS5_LPBIG_OFFBIG_LINTFLAGS
+#endif
+  };
+#endif
diff --git a/libc/sysdeps/linux/i386/bits/posix_opt.h b/libc/sysdeps/linux/i386/bits/posix_opt.h
new file mode 100644
index 000000000..15683b77e
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bits/posix_opt.h
@@ -0,0 +1,110 @@
+/* Define POSIX options for Linux.
+   Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#ifndef	_POSIX_OPT_H
+#define	_POSIX_OPT_H	1
+
+/* Job control is supported.  */
+#define	_POSIX_JOB_CONTROL	1
+
+/* Processes have a saved set-user-ID and a saved set-group-ID.  */
+#define	_POSIX_SAVED_IDS	1
+
+/* Priority scheduling is supported.  */
+#define	_POSIX_PRIORITY_SCHEDULING	1
+
+/* Synchronizing file data is supported.  */
+#define	_POSIX_SYNCHRONIZED_IO	1
+
+/* The fsync function is present.  */
+#define	_POSIX_FSYNC	1
+
+/* Mapping of files to memory is supported.  */
+#define	_POSIX_MAPPED_FILES	1
+
+/* Locking of all memory is supported.  */
+#define	_POSIX_MEMLOCK	1
+
+/* Locking of ranges of memory is supported.  */
+#define	_POSIX_MEMLOCK_RANGE	1
+
+/* Setting of memory protections is supported.  */
+#define	_POSIX_MEMORY_PROTECTION	1
+
+/* Implementation supports `poll' function.  */
+#define	_POSIX_POLL	1
+
+/* Implementation supports `select' and `pselect' functions.  */
+#define	_POSIX_SELECT	1
+
+/* Only root can change owner of file.  */
+#define	_POSIX_CHOWN_RESTRICTED	1
+
+/* `c_cc' member of 'struct termios' structure can be disabled by
+   using the value _POSIX_VDISABLE.  */
+#define	_POSIX_VDISABLE	'\0'
+
+/* Filenames are not silently truncated.  */
+#define	_POSIX_NO_TRUNC	1
+
+/* X/Open realtime support is available.  */
+#define _XOPEN_REALTIME	1
+
+/* X/Open realtime thread support is available.  */
+#define _XOPEN_REALTIME_THREADS	1
+
+/* XPG4.2 shared memory is supported.  */
+#define	_XOPEN_SHM	1
+
+/* Tell we have POSIX threads.  */
+#define _POSIX_THREADS	1
+
+/* We have the reentrant functions described in POSIX.  */
+#define _POSIX_REENTRANT_FUNCTIONS      1
+#define _POSIX_THREAD_SAFE_FUNCTIONS	1
+
+/* We provide priority scheduling for threads.  */
+#define	_POSIX_THREAD_PRIORITY_SCHEDULING	1
+
+/* We support user-defined stack sizes.  */
+#define _POSIX_THREAD_ATTR_STACKSIZE	1
+
+/* We support user-defined stacks.  */
+#define _POSIX_THREAD_ATTR_STACKADDR	1
+
+/* We support POSIX.1b semaphores, but only the non-shared form for now.  */
+/*#define _POSIX_SEMAPHORES	1	XXX We are not quite there now.  */
+
+/* Real-time signals are supported.  */
+#define _POSIX_REALTIME_SIGNALS	1
+
+/* We support asynchronous I/O.  */
+#define _POSIX_ASYNCHRONOUS_IO	1
+/* Alternative name for Unix98.  */
+#define _LFS_ASYNCHRONOUS_IO	1
+
+/* The LFS support in asynchronous I/O is also available.  */
+#define _LFS64_ASYNCHRONOUS_IO	1
+
+/* The rest of the LFS is also available.  */
+#define _LFS_LARGEFILE		1
+#define _LFS64_LARGEFILE	1
+#define _LFS64_STDIO		1
+
+#endif /* posix_opt.h */
diff --git a/libc/unistd/Makefile b/libc/unistd/Makefile
index 4e5e5fc8a..db8c0c019 100644
--- a/libc/unistd/Makefile
+++ b/libc/unistd/Makefile
@@ -25,7 +25,8 @@ include $(TOPDIR)Rules.mak
 LIBC=$(TOPDIR)libc.a
 
 
-CSRC=execl.c execlp.c execv.c execvep.c execvp.c getcwd.c getopt.c sleep.c
+CSRC=execl.c execlp.c execv.c execvep.c execvp.c getcwd.c getopt.c \
+	sleep.c sysconf.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))
 OBJS=$(COBJS)
 
diff --git a/libc/unistd/execlp.c b/libc/unistd/execlp.c
index 571ab71b0..50fb4a032 100644
--- a/libc/unistd/execlp.c
+++ b/libc/unistd/execlp.c
@@ -4,6 +4,7 @@
 #include <stdarg.h>
 
 extern char **environ;
+extern int execvep(const char *path, char *__const argv[], char *__const envp[]);
 
 int execlp(__const char *file, __const char *arg, ...)
 {
diff --git a/libc/unistd/execvp.c b/libc/unistd/execvp.c
index b2aeee917..943303332 100644
--- a/libc/unistd/execvp.c
+++ b/libc/unistd/execvp.c
@@ -2,6 +2,7 @@
 #include <unistd.h>
 
 extern char **environ;
+extern int execvep(const char *path, char *__const argv[], char *__const envp[]);
 
 int execvp(__const char *path, char *__const argv[])
 {
diff --git a/libc/unistd/sleep.c b/libc/unistd/sleep.c
index 5b458e07a..e11770563 100644
--- a/libc/unistd/sleep.c
+++ b/libc/unistd/sleep.c
@@ -4,7 +4,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
-void usleep(unsigned long usec)
+void usleep(unsigned int usec)
 {
 	struct timeval tv;
 
diff --git a/libc/unistd/sysconf.c b/libc/unistd/sysconf.c
new file mode 100644
index 000000000..96aa30122
--- /dev/null
+++ b/libc/unistd/sysconf.c
@@ -0,0 +1,855 @@
+/* Copyright (C) 1991, 93, 95, 96, 97, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <limits.h>
+#include <grp.h>
+#include <pwd.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+#include <sys/sysinfo.h>
+#include <sys/types.h>
+#include <regex.h>
+
+
+/* Get the value of the system variable NAME.  */
+long int sysconf(int name)
+{
+  switch (name)
+    {
+    default:
+      errno=EINVAL;
+      return -1;
+
+    case _SC_ARG_MAX:
+#ifdef	ARG_MAX
+      return ARG_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_CHILD_MAX:
+#ifdef	CHILD_MAX
+      return CHILD_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_CLK_TCK:
+#ifdef	CLK_TCK
+      return CLK_TCK;
+#else
+      return 60;
+#endif
+
+    case _SC_NGROUPS_MAX:
+#ifdef	NGROUPS_MAX
+      return NGROUPS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_OPEN_MAX:
+#if 0
+      return getdtablesize ();
+#else
+      return -1;
+#endif
+
+    case _SC_STREAM_MAX:
+#ifdef	STREAM_MAX
+      return STREAM_MAX;
+#else
+      return FOPEN_MAX;
+#endif
+
+    case _SC_TZNAME_MAX:
+#if 0
+      return tzname_max ();
+#else
+      return -1;
+#endif
+
+    case _SC_JOB_CONTROL:
+#ifdef	_POSIX_JOB_CONTROL
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_SAVED_IDS:
+#ifdef	_POSIX_SAVED_IDS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_REALTIME_SIGNALS:
+#ifdef	_POSIX_REALTIME_SIGNALS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PRIORITY_SCHEDULING:
+#ifdef	_POSIX_PRIORITY_SCHEDULING
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_TIMERS:
+#ifdef	_POSIX_TIMERS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_ASYNCHRONOUS_IO:
+#ifdef	_POSIX_ASYNCHRONOUS_IO
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PRIORITIZED_IO:
+#ifdef	_POSIX_PRIORITIZED_IO
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_SYNCHRONIZED_IO:
+#ifdef	_POSIX_SYNCHRONIZED_IO
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_FSYNC:
+#ifdef	_POSIX_FSYNC
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_MAPPED_FILES:
+#ifdef	_POSIX_MAPPED_FILES
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_MEMLOCK:
+#ifdef	_POSIX_MEMLOCK
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_MEMLOCK_RANGE:
+#ifdef	_POSIX_MEMLOCK_RANGE
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_MEMORY_PROTECTION:
+#ifdef	_POSIX_MEMORY_PROTECTION
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_MESSAGE_PASSING:
+#ifdef	_POSIX_MESSAGE_PASSING
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_SEMAPHORES:
+#ifdef	_POSIX_SEMAPHORES
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_SHARED_MEMORY_OBJECTS:
+#ifdef	_POSIX_SHARED_MEMORY_OBJECTS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_VERSION:
+      return _POSIX_VERSION;
+
+    case _SC_PAGESIZE:
+#if 0
+      return __getpagesize ();
+#else
+      return -1;
+#endif
+
+    case _SC_AIO_LISTIO_MAX:
+#ifdef	AIO_LISTIO_MAX
+      return AIO_LISTIO_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_AIO_MAX:
+#ifdef	AIO_MAX
+      return AIO_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_AIO_PRIO_DELTA_MAX:
+#ifdef	AIO_PRIO_DELTA_MAX
+      return AIO_PRIO_DELTA_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_DELAYTIMER_MAX:
+#ifdef	DELAYTIMER_MAX
+      return DELAYTIMER_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_MQ_OPEN_MAX:
+#ifdef	MQ_OPEN_MAX
+      return MQ_OPEN_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_MQ_PRIO_MAX:
+#ifdef	MQ_PRIO_MAX
+      return MQ_PRIO_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_RTSIG_MAX:
+#ifdef	RTSIG_MAX
+      return RTSIG_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_SEM_NSEMS_MAX:
+#ifdef	SEM_NSEMS_MAX
+      return SEM_NSEMS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_SEM_VALUE_MAX:
+#ifdef	SEM_VALUE_MAX
+      return SEM_VALUE_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_SIGQUEUE_MAX:
+#ifdef	SIGQUEUE_MAX
+      return SIGQUEUE_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_TIMER_MAX:
+#ifdef	TIMER_MAX
+      return TIMER_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_BC_BASE_MAX:
+#ifdef	BC_BASE_MAX
+      return BC_BASE_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_BC_DIM_MAX:
+#ifdef	BC_DIM_MAX
+      return BC_DIM_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_BC_SCALE_MAX:
+#ifdef	BC_SCALE_MAX
+      return BC_SCALE_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_BC_STRING_MAX:
+#ifdef	BC_STRING_MAX
+      return BC_STRING_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_COLL_WEIGHTS_MAX:
+#ifdef	COLL_WEIGHTS_MAX
+      return COLL_WEIGHTS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_EQUIV_CLASS_MAX:
+#ifdef	EQUIV_CLASS_MAX
+      return EQUIV_CLASS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_EXPR_NEST_MAX:
+#ifdef	EXPR_NEST_MAX
+      return EXPR_NEST_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_LINE_MAX:
+#ifdef	LINE_MAX
+      return LINE_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_RE_DUP_MAX:
+#ifdef	RE_DUP_MAX
+      return RE_DUP_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_CHARCLASS_NAME_MAX:
+#ifdef	CHARCLASS_NAME_MAX
+      return CHARCLASS_NAME_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_PII:
+#ifdef	_POSIX_PII
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_XTI:
+#ifdef	_POSIX_PII_XTI
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_SOCKET:
+#ifdef	_POSIX_PII_SOCKET
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_INTERNET:
+#ifdef	_POSIX_PII_INTERNET
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_OSI:
+#ifdef	_POSIX_PII_OSI
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_POLL:
+#ifdef	_POSIX_POLL
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_SELECT:
+#ifdef	_POSIX_SELECT
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_UIO_MAXIOV:
+#ifdef	UIO_MAXIOV
+      return UIO_MAXIOV;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_INTERNET_STREAM:
+#ifdef	_POSIX_PII_INTERNET_STREAM
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_INTERNET_DGRAM:
+#ifdef	_POSIX_PII_INTERNET_DGRAM
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_OSI_COTS:
+#ifdef	_POSIX_PII_OSI_COTS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_OSI_CLTS:
+#ifdef	_POSIX_PII_OSI_CLTS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_PII_OSI_M:
+#ifdef	_POSIX_PII_OSI_M
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_T_IOV_MAX:
+#ifdef	_T_IOV_MAX
+      return _T_IOV_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_2_VERSION:
+      return _POSIX2_VERSION;
+
+    case _SC_2_C_BIND:
+#ifdef	_POSIX2_C_BIND
+      return _POSIX2_C_BIND;
+#else
+      return -1;
+#endif
+
+    case _SC_2_C_DEV:
+#ifdef	_POSIX2_C_DEV
+      return _POSIX2_C_DEV;
+#else
+      return -1;
+#endif
+
+    case _SC_2_C_VERSION:
+#ifdef	_POSIX2_C_VERSION
+      return _POSIX2_C_VERSION;
+#else
+      return -1;
+#endif
+
+    case _SC_2_FORT_DEV:
+#ifdef	_POSIX2_FORT_DEV
+      return _POSIX2_FORT_DEV;
+#else
+      return -1;
+#endif
+
+    case _SC_2_LOCALEDEF:
+#ifdef	_POSIX2_LOCALEDEF
+      return _POSIX2_LOCALEDEF;
+#else
+      return -1;
+#endif
+
+    case _SC_2_SW_DEV:
+#ifdef	_POSIX2_SW_DEV
+      return _POSIX2_SW_DEV;
+#else
+      return -1;
+#endif
+
+    case _SC_2_CHAR_TERM:
+#ifdef	_POSIX2_CHAR_TERM
+      return _POSIX2_CHAR_TERM;
+#else
+      return -1;
+#endif
+
+    case _SC_2_UPE:
+#ifdef	_POSIX2_UPE
+      return _POSIX2_UPE;
+#else
+      return -1;
+#endif
+
+      /* POSIX 1003.1c (POSIX Threads).  */
+    case _SC_THREADS:
+#ifdef	_POSIX_THREADS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_SAFE_FUNCTIONS:
+#ifdef	_POSIX_THREAD_SAFE_FUNCTIONS
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_GETGR_R_SIZE_MAX:
+#ifdef	NSS_BUFLEN_GROUP
+      return NSS_BUFLEN_GROUP;
+#else
+      return -1;
+#endif
+
+    case _SC_GETPW_R_SIZE_MAX:
+#ifdef	NSS_BUFLEN_PASSWD
+      return NSS_BUFLEN_PASSWD;
+#else
+      return -1;
+#endif
+
+    case _SC_LOGIN_NAME_MAX:
+#ifdef	_POSIX_LOGIN_NAME_MAX
+      return _POSIX_LOGIN_NAME_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_TTY_NAME_MAX:
+#ifdef	_POSIX_TTY_NAME_MAX
+      return _POSIX_TTY_NAME_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_DESTRUCTOR_ITERATIONS:
+#ifdef	_POSIX_THREAD_DESTRUCTOR_ITERATIONS
+      return _POSIX_THREAD_DESTRUCTOR_ITERATIONS;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_KEYS_MAX:
+#ifdef	PTHREAD_KEYS_MAX
+      return PTHREAD_KEYS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_STACK_MIN:
+#ifdef	PTHREAD_STACK_MIN
+      return PTHREAD_STACK_MIN;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_THREADS_MAX:
+#ifdef	PTHREAD_THREADS_MAX
+      return PTHREAD_THREADS_MAX;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_ATTR_STACKADDR:
+#ifdef	_POSIX_THREAD_ATTR_STACKADDR
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_ATTR_STACKSIZE:
+#ifdef	_POSIX_THREAD_ATTR_STACKSIZE
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_PRIORITY_SCHEDULING:
+#ifdef	_POSIX_THREAD_PRIORITY_SCHEDULING
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_PRIO_INHERIT:
+#ifdef	_POSIX_THREAD_PRIO_INHERIT
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_PRIO_PROTECT:
+#ifdef	_POSIX_THREAD_PRIO_PROTECT
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_THREAD_PROCESS_SHARED:
+#ifdef	_POSIX_THREAD_PROCESS_SHARED
+      return 1;
+#else
+      return -1;
+#endif
+
+    case _SC_NPROCESSORS_CONF:
+#if 0
+      return get_nprocs_conf ();
+#else
+      return -1;
+#endif
+
+    case _SC_NPROCESSORS_ONLN:
+#if 0
+      return get_nprocs ();
+#else
+      return -1;
+#endif
+
+    case _SC_PHYS_PAGES:
+#if 0
+      return get_phys_pages ();
+#else
+      return -1;
+#endif
+
+    case _SC_AVPHYS_PAGES:
+#if 0
+      return get_avphys_pages ();
+#else
+      return -1;
+#endif
+
+    case _SC_ATEXIT_MAX:
+      /* We have no limit since we use lists.  */
+      return INT_MAX;
+
+    case _SC_PASS_MAX:
+      /* We have no limit but since the return value might be used to
+	 allocate a buffer we restrict the value.  */
+      return BUFSIZ;
+
+    case _SC_XOPEN_VERSION:
+      return _XOPEN_VERSION;
+
+    case _SC_XOPEN_XCU_VERSION:
+      return _XOPEN_XCU_VERSION;
+
+    case _SC_XOPEN_UNIX:
+      return _XOPEN_UNIX;
+
+    case _SC_XOPEN_CRYPT:
+#ifdef	_XOPEN_CRYPT
+      return _XOPEN_CRYPT;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_ENH_I18N:
+#ifdef	_XOPEN_ENH_I18N
+      return _XOPEN_ENH_I18N;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_SHM:
+#ifdef	_XOPEN_SHM
+      return _XOPEN_SHM;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_XPG2:
+#ifdef	_XOPEN_XPG2
+      return _XOPEN_XPG2;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_XPG3:
+#ifdef	_XOPEN_XPG3
+      return _XOPEN_XPG3;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_XPG4:
+#ifdef	_XOPEN_XPG4
+      return _XOPEN_XPG4;
+#else
+      return -1;
+#endif
+
+    case _SC_CHAR_BIT:
+      return CHAR_BIT;
+
+    case _SC_CHAR_MAX:
+      return CHAR_MAX;
+
+    case _SC_CHAR_MIN:
+      return CHAR_MIN;
+
+    case _SC_INT_MAX:
+      return INT_MAX;
+
+    case _SC_INT_MIN:
+      return INT_MIN;
+
+    case _SC_LONG_BIT:
+      return sizeof (long int) * CHAR_BIT;
+
+    case _SC_WORD_BIT:
+      return sizeof (int) * CHAR_BIT;
+
+    case _SC_MB_LEN_MAX:
+      return MB_LEN_MAX;
+
+    case _SC_NZERO:
+      return NZERO;
+
+    case _SC_SSIZE_MAX:
+      return _POSIX_SSIZE_MAX;
+
+    case _SC_SCHAR_MAX:
+      return SCHAR_MAX;
+
+    case _SC_SCHAR_MIN:
+      return SCHAR_MIN;
+
+    case _SC_SHRT_MAX:
+      return SHRT_MAX;
+
+    case _SC_SHRT_MIN:
+      return SHRT_MIN;
+
+    case _SC_UCHAR_MAX:
+      return UCHAR_MAX;
+
+    case _SC_UINT_MAX:
+      return UINT_MAX;
+
+    case _SC_ULONG_MAX:
+      return ULONG_MAX;
+
+    case _SC_USHRT_MAX:
+      return USHRT_MAX;
+
+    case _SC_NL_ARGMAX:
+#ifdef	NL_ARGMAX
+      return NL_ARGMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_NL_LANGMAX:
+#ifdef	NL_LANGMAX
+      return NL_LANGMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_NL_MSGMAX:
+#ifdef	NL_MSGMAX
+      return NL_MSGMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_NL_NMAX:
+#ifdef	NL_NMAX
+      return NL_NMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_NL_SETMAX:
+#ifdef	NL_SETMAX
+      return NL_SETMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_NL_TEXTMAX:
+#ifdef	NL_TEXTMAX
+      return NL_TEXTMAX;
+#else
+      return -1;
+#endif
+
+    case _SC_XBS5_ILP32_OFF32:
+#ifdef _XBS5_ILP32_OFF32
+      return _XBS5_ILP32_OFF32;
+#else
+      return -1;
+#endif
+    case _SC_XBS5_ILP32_OFFBIG:
+#ifdef _XBS5_ILP32_OFFBIG
+      return _XBS5_ILP32_OFFBIG;
+#else
+      return -1;
+#endif
+    case _SC_XBS5_LP64_OFF64:
+#ifdef _XBS5_LP64_OFF64
+      return _XBS5_LP64_OFF64;
+#else
+      return -1;
+#endif
+    case _SC_XBS5_LPBIG_OFFBIG:
+#ifdef _XBS5_LPBIG_OFFBIG
+      return _XBS5_LPBIG_OFFBIG;
+#else
+      return -1;
+#endif
+
+    case _SC_XOPEN_LEGACY:
+      return _XOPEN_LEGACY;
+
+    case _SC_XOPEN_REALTIME:
+#ifdef _XOPEN_REALTIME
+      return _XOPEN_REALTIME;
+#else
+      return -1;
+#endif
+    case _SC_XOPEN_REALTIME_THREADS:
+#ifdef _XOPEN_REALTIME_THREADS
+      return _XOPEN_REALTIME_THREADS;
+#else
+      return -1;
+#endif
+    }
+}
+