Fix up pathconf and friend so that test suits can work

1 files changed, 240 insertions, 24 deletions

diff --git a/libc/unistd/fpathconf.c b/libc/unistd/fpathconf.c
index 140b94fdb..f896e934b 100644
--- a/libc/unistd/fpathconf.c
+++ b/libc/unistd/fpathconf.c
@@ -1,30 +1,246 @@
-/* vi: set sw=4 ts=4: */
-/*
- * fpathconf for uClibc
- *
- * Copyright (C) 2001 by Lineo, inc.  Written by 
- *    Erik Andersen * <andersen@lineo.com>, <andersee@debian.org>
- *
- * 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 Library General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Library 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
- *
- */
+/* fpathconf -- adjusted for busybox
+   Copyright (C) 1991,95,96,98,99,2000,2001 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
 #include <unistd.h>
+#include <limits.h>
+#include <sys/statfs.h>
+#include <errno.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <limits.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/statfs.h>
+//#include <sys/statvfs.h>
+
+//#include "linux_fsinfo.h"
 
-long fpathconf(int filedes, int name)
-{
+
+/* The Linux kernel headers mention this as a kind of generic value.  */
+#define LINUX_LINK_MAX	127
+
+
+/* Get file-specific information about descriptor FD.  */
+long int fpathconf(int fd, int name)
+{     
+    if (fd < 0)
+    {
+	__set_errno (EBADF);
 	return -1;
+    }   
+
+    if (name == _PC_LINK_MAX)
+    {
+	/* Cut some corners */
+#if 0
+	struct statfs fsbuf;
+
+	/* Determine the filesystem type.  */
+	if (fstatfs (fd, &fsbuf) < 0)
+	{
+	    if (errno == ENOSYS)
+		/* not possible, return the default value.  */
+		return LINUX_LINK_MAX;
+
+	    /* Some error occured.  */
+	    return -1;
+	}
+
+	switch (fsbuf.f_type)
+	{
+	    case EXT2_SUPER_MAGIC:
+		return EXT2_LINK_MAX;
+
+	    case MINIX_SUPER_MAGIC:
+	    case MINIX_SUPER_MAGIC2:
+		return MINIX_LINK_MAX;
+
+	    case MINIX2_SUPER_MAGIC:
+	    case MINIX2_SUPER_MAGIC2:
+		return MINIX2_LINK_MAX;
+
+	    case XENIX_SUPER_MAGIC:
+		return XENIX_LINK_MAX;
+
+	    case SYSV4_SUPER_MAGIC:
+	    case SYSV2_SUPER_MAGIC:
+		return SYSV_LINK_MAX;
+
+	    case COH_SUPER_MAGIC:
+		return COH_LINK_MAX;
+
+	    case UFS_MAGIC:
+	    case UFS_CIGAM:
+		return UFS_LINK_MAX;
+
+	    case REISERFS_SUPER_MAGIC:
+		return REISERFS_LINK_MAX;
+
+	    default:
+		return LINUX_LINK_MAX;
+	}
+#else
+	return LINUX_LINK_MAX;
+#endif
+    }
+
+    switch (name)
+    {
+	default:
+	    __set_errno (EINVAL);
+	    return -1;
+
+	case _PC_MAX_CANON:
+#ifdef	MAX_CANON
+	    return MAX_CANON;
+#else
+	    return -1;
+#endif
+
+	case _PC_MAX_INPUT:
+#ifdef	MAX_INPUT
+	    return MAX_INPUT;
+#else
+	    return -1;
+#endif
+
+	case _PC_NAME_MAX:
+#ifdef	NAME_MAX
+	    {
+		struct statfs buf;
+		int save_errno = errno;
+
+		if (fstatfs (fd, &buf) < 0)
+		{
+		    if (errno == ENOSYS)
+		    {
+			errno = save_errno;
+			return NAME_MAX;
+		    }
+		    return -1;
+		}
+		else
+		{
+#ifdef _STATFS_F_NAMELEN
+		    return buf.f_namelen;
+#else
+# ifdef _STATFS_F_NAME_MAX
+		    return buf.f_name_max;
+# else
+		    return NAME_MAX;
+# endif
+#endif
+		}
+	    }
+#else
+	    return -1;
+#endif
+
+	case _PC_PATH_MAX:
+#ifdef	PATH_MAX
+	    return PATH_MAX;
+#else
+	    return -1;
+#endif
+
+	case _PC_PIPE_BUF:
+#ifdef	PIPE_BUF
+	    return PIPE_BUF;
+#else
+	    return -1;
+#endif
+
+	case _PC_CHOWN_RESTRICTED:
+#ifdef	_POSIX_CHOWN_RESTRICTED
+	    return _POSIX_CHOWN_RESTRICTED;
+#else
+	    return -1;
+#endif
+
+	case _PC_NO_TRUNC:
+#ifdef	_POSIX_NO_TRUNC
+	    return _POSIX_NO_TRUNC;
+#else
+	    return -1;
+#endif
+
+	case _PC_VDISABLE:
+#ifdef	_POSIX_VDISABLE
+	    return _POSIX_VDISABLE;
+#else
+	    return -1;
+#endif
+
+	case _PC_SYNC_IO:
+#ifdef	_POSIX_SYNC_IO
+	    return _POSIX_SYNC_IO;
+#else
+	    return -1;
+#endif
+
+	case _PC_ASYNC_IO:
+#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAVE_LFS__ 
+	    {
+		/* AIO is only allowed on regular files and block devices.  */
+		struct stat st;
+
+		if (fstat (fd, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode)))
+		    return -1;
+		else
+		    return 1;
+	    }
+#else
+	    return -1;
+#endif
+
+	case _PC_PRIO_IO:
+#ifdef	_POSIX_PRIO_IO
+	    return _POSIX_PRIO_IO;
+#else
+	    return -1;
+#endif
+
+	case _PC_SOCK_MAXBUF:
+#ifdef	SOCK_MAXBUF
+	    return SOCK_MAXBUF;
+#else
+	    return -1;
+#endif
+
+	case _PC_FILESIZEBITS:
+#ifdef FILESIZEBITS
+	    return FILESIZEBITS;
+#else
+	    /* We let platforms with larger file sizes overwrite this value.  */
+	    return 32;
+#endif
+
+	    /* Be lazy -- skip these */
+	case _PC_REC_INCR_XFER_SIZE:
+	case _PC_REC_MAX_XFER_SIZE:
+	case _PC_REC_MIN_XFER_SIZE:
+	case _PC_REC_XFER_ALIGN:
+	case _PC_ALLOC_SIZE_MIN:
+	case _PC_SYMLINK_MAX:
+	    return -1;
+    }
+
 }