diff options
Diffstat (limited to 'libc/unistd/pathconf.c')
| -rw-r--r-- | libc/unistd/pathconf.c | 244 |
1 files changed, 94 insertions, 150 deletions
diff --git a/libc/unistd/pathconf.c b/libc/unistd/pathconf.c index f41cf69ba..8d6e7ba40 100644 --- a/libc/unistd/pathconf.c +++ b/libc/unistd/pathconf.c @@ -1,5 +1,5 @@ -/* pathconf -- adjusted for busybox - Copyright (C) 1991,95,96,98,99,2000,2001 Free Software Foundation, Inc. +/* Copyright (C) 1991,1995,1996,1998,2000,2001,2003 + 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 @@ -17,15 +17,12 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ +/* pathconf -- adjusted for busybox */ /* It would be great it this could be implemented using fpathconf, * but that doesn't work out very well (think FIFOs and sockets) */ #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> @@ -34,219 +31,166 @@ #include <sys/statfs.h> //#include <sys/statvfs.h> -//#include "linux_fsinfo.h" - libc_hidden_proto(statfs) libc_hidden_proto(stat) -/* 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 pathconf(const char *path, int name) +/* Get file-specific information about PATH. */ +long int +pathconf (const char *path, int name) { - if (path[0] == '\0') + if (path[0] == '\0') { - __set_errno (ENOENT); - return -1; + __set_errno (ENOENT); + return -1; } - if (name == _PC_LINK_MAX) + switch (name) { - /* Cut some corners */ -#if 0 - struct statfs fsbuf; - - /* Determine the filesystem type. */ - if (statfs (path, &fsbuf) < 0) - { - if (errno == ENOSYS) - /* not possible, return the default value. */ - return LINUX_LINK_MAX; - - /* Some error occured. */ - return -1; - } + default: + __set_errno (EINVAL); + 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; - } + case _PC_LINK_MAX: +#ifdef LINK_MAX + return LINK_MAX; #else - return LINUX_LINK_MAX; + return -1; #endif - } - - switch (name) - { - default: - __set_errno (EINVAL); - return -1; - case _PC_MAX_CANON: + case _PC_MAX_CANON: #ifdef MAX_CANON - return MAX_CANON; + return MAX_CANON; #else - return -1; + return -1; #endif - case _PC_MAX_INPUT: + case _PC_MAX_INPUT: #ifdef MAX_INPUT - return MAX_INPUT; + return MAX_INPUT; #else - return -1; + return -1; #endif - case _PC_NAME_MAX: + case _PC_NAME_MAX: #ifdef NAME_MAX - { - struct statfs buf; - int save_errno = errno; - - if (statfs (path, &buf) < 0) - { - if (errno == ENOSYS) - { - errno = save_errno; - return NAME_MAX; - } - return -1; - } - else - { + { + struct statfs buf; + int save_errno = errno; + + if (statfs (path, &buf) < 0) + { + if (errno == ENOSYS) + { + errno = save_errno; + return NAME_MAX; + } + return -1; + } + else + { #ifdef _STATFS_F_NAMELEN - return buf.f_namelen; + return buf.f_namelen; #else # ifdef _STATFS_F_NAME_MAX - return buf.f_name_max; + return buf.f_name_max; # else - return NAME_MAX; + return NAME_MAX; # endif #endif - } - } + } + } #else - return -1; + return -1; #endif - case _PC_PATH_MAX: + case _PC_PATH_MAX: #ifdef PATH_MAX - return PATH_MAX; + return PATH_MAX; #else - return -1; + return -1; #endif - case _PC_PIPE_BUF: + case _PC_PIPE_BUF: #ifdef PIPE_BUF - return PIPE_BUF; + return PIPE_BUF; #else - return -1; + return -1; #endif - case _PC_CHOWN_RESTRICTED: + case _PC_CHOWN_RESTRICTED: #ifdef _POSIX_CHOWN_RESTRICTED - return _POSIX_CHOWN_RESTRICTED; + return _POSIX_CHOWN_RESTRICTED; #else - return -1; + return -1; #endif - case _PC_NO_TRUNC: + case _PC_NO_TRUNC: #ifdef _POSIX_NO_TRUNC - return _POSIX_NO_TRUNC; + return _POSIX_NO_TRUNC; #else - return -1; + return -1; #endif - case _PC_VDISABLE: + case _PC_VDISABLE: #ifdef _POSIX_VDISABLE - return _POSIX_VDISABLE; + return _POSIX_VDISABLE; #else - return -1; + return -1; #endif - case _PC_SYNC_IO: + case _PC_SYNC_IO: #ifdef _POSIX_SYNC_IO - return _POSIX_SYNC_IO; + return _POSIX_SYNC_IO; #else - return -1; + return -1; #endif - case _PC_ASYNC_IO: -#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAS_LFS__ - { - /* AIO is only allowed on regular files and block devices. */ - struct stat st; - - if (stat (path, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode))) - return -1; - else - return 1; - } + case _PC_ASYNC_IO: +#if defined _POSIX_ASYNC_IO && defined __UCLIBC_HAS_LFS__ + { + /* AIO is only allowed on regular files and block devices. */ + struct stat st; + + if (stat (path, &st) < 0 + || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode))) + return -1; + else + return 1; + } #else - return -1; + return -1; #endif - case _PC_PRIO_IO: + case _PC_PRIO_IO: #ifdef _POSIX_PRIO_IO - return _POSIX_PRIO_IO; + return _POSIX_PRIO_IO; #else - return -1; + return -1; #endif - case _PC_SOCK_MAXBUF: + case _PC_SOCK_MAXBUF: #ifdef SOCK_MAXBUF - return SOCK_MAXBUF; + return SOCK_MAXBUF; #else - return -1; + return -1; #endif - case _PC_FILESIZEBITS: + case _PC_FILESIZEBITS: #ifdef FILESIZEBITS - return FILESIZEBITS; + return FILESIZEBITS; #else - /* We let platforms with larger file sizes overwrite this value. */ - return 32; + /* 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; + /* 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; } - } - |