/* Copyright (C) 2005, 2006, 2009 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. */ #define __fxstatat64 __fxstatat64_disable #include #include #include #include #include #include #include #include #include #undef __fxstatat64 /* Get information about the file NAME in BUF. */ int __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag) { if (flag & ~AT_SYMLINK_NOFOLLOW) { __set_errno (EINVAL); return -1; } char *buf = NULL; if (fd != AT_FDCWD && file[0] != '/') { size_t filelen = strlen (file); if (__builtin_expect (filelen == 0, 0)) { __set_errno (ENOENT); return -1; } static const char procfd[] = "/proc/self/fd/%d/%s"; /* Buffer for the path name we are going to use. It consists of - the string /proc/self/fd/ - the file descriptor number - the file name provided. The final NUL is included in the sizeof. A bit of overhead due to the format elements compensates for possible negative numbers. */ size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen; buf = alloca (buflen); __snprintf (buf, buflen, procfd, fd, file); file = buf; } INTERNAL_SYSCALL_DECL (err); int result, errno_out; struct kernel_stat kst; #if __ASSUME_STAT64_SYSCALL > 0 if (vers == _STAT_VER_KERNEL64) { if (flag & AT_SYMLINK_NOFOLLOW) result = INTERNAL_SYSCALL (lstat64, err, 2, file, st); else result = INTERNAL_SYSCALL (stat64, err, 2, file, st); if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1)) return result; errno_out = INTERNAL_SYSCALL_ERRNO (result, err); goto fail; } #elif defined __NR_stat64 if (vers == _STAT_VER_KERNEL64 && !__libc_missing_axp_stat64) { if (flag & AT_SYMLINK_NOFOLLOW) result = INTERNAL_SYSCALL (lstat64, err, 2, file, st); else result = INTERNAL_SYSCALL (stat64, err, 2, file, st); if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1)) return result; errno_out = INTERNAL_SYSCALL_ERRNO (result, err); if (errno_out != ENOSYS) goto fail; __libc_missing_axp_stat64 = 1; } #endif if (flag & AT_SYMLINK_NOFOLLOW) result = INTERNAL_SYSCALL (lstat, err, 2, file, &kst); else result = INTERNAL_SYSCALL (stat, err, 2, file, &kst); if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1)) return __xstat_conv (vers, &kst, st); errno_out = INTERNAL_SYSCALL_ERRNO (result, err); fail: __atfct_seterrno (errno_out, fd, buf); return -1; } libc_hidden_def (__fxstatat) strong_alias (__fxstatat, __fxstatat64); libc_hidden_ver(__fxstatat, __fxstatat64);