1 /* Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19 #define __fxstatat64 __fxstatat64_disable
26 #include <kernel_stat.h>
28 #include <sys/syscall.h>
29 #include <xstatconv.h>
34 /* Get information about the file NAME in BUF. */
36 __fxstatat (int vers, int fd, const char *file, struct stat *st, int flag)
38 if (flag & ~AT_SYMLINK_NOFOLLOW)
46 if (fd != AT_FDCWD && file[0] != '/')
48 size_t filelen = strlen (file);
49 if (__builtin_expect (filelen == 0, 0))
55 static const char procfd[] = "/proc/self/fd/%d/%s";
56 /* Buffer for the path name we are going to use. It consists of
57 - the string /proc/self/fd/
58 - the file descriptor number
59 - the file name provided.
60 The final NUL is included in the sizeof. A bit of overhead
61 due to the format elements compensates for possible negative
63 size_t buflen = sizeof (procfd) + sizeof (int) * 3 + filelen;
64 buf = alloca (buflen);
66 __snprintf (buf, buflen, procfd, fd, file);
70 INTERNAL_SYSCALL_DECL (err);
71 int result, errno_out;
72 struct kernel_stat kst;
74 if (vers == _STAT_VER_KERNEL64 && !__libc_missing_axp_stat64)
76 if (flag & AT_SYMLINK_NOFOLLOW)
77 result = INTERNAL_SYSCALL (lstat64, err, 2, file, st);
79 result = INTERNAL_SYSCALL (stat64, err, 2, file, st);
81 if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
83 errno_out = INTERNAL_SYSCALL_ERRNO (result, err);
84 if (errno_out != ENOSYS)
86 __libc_missing_axp_stat64 = 1;
89 if (flag & AT_SYMLINK_NOFOLLOW)
90 result = INTERNAL_SYSCALL (lstat, err, 2, file, &kst);
92 result = INTERNAL_SYSCALL (stat, err, 2, file, &kst);
94 if (__builtin_expect (!INTERNAL_SYSCALL_ERROR_P (result, err), 1))
95 return __xstat_conv (vers, &kst, st);
96 errno_out = INTERNAL_SYSCALL_ERRNO (result, err);
99 __atfct_seterrno (errno_out, fd, buf);
103 libc_hidden_def (__fxstatat)
104 strong_alias (__fxstatat, __fxstatat64);
105 libc_hidden_ver(__fxstatat, __fxstatat64);