diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/faccessat.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/faccessat.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/sysdeps/unix/sysv/linux/faccessat.c b/sysdeps/unix/sysv/linux/faccessat.c deleted file mode 100644 index 10b903d076..0000000000 --- a/sysdeps/unix/sysv/linux/faccessat.c +++ /dev/null @@ -1,143 +0,0 @@ -/* Test for access to file, relative to open directory. Linux version. - Copyright (C) 2006 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 <fcntl.h> -#include <stddef.h> -#include <stdio.h> -#include <string.h> -#include <unistd.h> -#include <sys/types.h> -#include <alloca.h> -#include <kernel-features.h> -#include <sysdep.h> - - -int -faccessat (fd, file, mode, flag) - int fd; - const char *file; - int mode; - int flag; -{ - if (flag & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS)) - { - __set_errno (EINVAL); - return -1; - } - -#ifdef __NR_faccessat - if ((flag == 0 || ((flag & ~AT_EACCESS) == 0 && ! __libc_enable_secure)) -# ifndef __ASSUME_ATFCTS - && __have_atfcts >= 0 -# endif - ) - { - int result = INLINE_SYSCALL (faccessat, 3, fd, file, mode); -# ifndef __ASSUME_ATFCTS - if (result == -1 && errno == ENOSYS) - __have_atfcts = -1; - else -# endif - return result; - } -#endif - -#ifndef __ASSUME_ATFCTS - if ((!(flag & AT_EACCESS) || ! __libc_enable_secure) -# ifndef __NR_laccess /* Linux so far has no laccess syscall. */ - && !(flag & AT_SYMLINK_NOFOLLOW) -# endif - ) - { - /* If we are not set-uid or set-gid, access does the same. */ - char *buf = NULL; - - if (fd != AT_FDCWD && file[0] != '/') - { - size_t filelen = strlen (file); - 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; - } - - int result; - INTERNAL_SYSCALL_DECL (err); - -# ifdef __NR_laccess - if (flag & AT_SYMLINK_NOFOLLOW) - result = INTERNAL_SYSCALL (laccess, err, 2, file, mode); - else -# endif - result = INTERNAL_SYSCALL (access, err, 2, file, mode); - - if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (result, err), 0)) - { - __atfct_seterrno (INTERNAL_SYSCALL_ERRNO (result, err), fd, buf); - result = -1; - } - - return result; - } -#endif - - struct stat64 stats; - if (fstatat64 (fd, file, &stats, flag & AT_SYMLINK_NOFOLLOW)) - return -1; - - mode &= (X_OK | W_OK | R_OK); /* Clear any bogus bits. */ -#if R_OK != S_IROTH || W_OK != S_IWOTH || X_OK != S_IXOTH -# error Oops, portability assumptions incorrect. -#endif - - if (mode == F_OK) - return 0; /* The file exists. */ - - uid_t uid = (flag & AT_EACCESS) ? __geteuid () : __getuid (); - - /* The super-user can read and write any file, and execute any file - that anyone can execute. */ - if (uid == 0 && ((mode & X_OK) == 0 - || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))) - return 0; - - int granted = (uid == stats.st_uid - ? (unsigned int) (stats.st_mode & (mode << 6)) >> 6 - : (stats.st_gid == ((flag & AT_EACCESS) - ? __getegid () : __getgid ()) - || __group_member (stats.st_gid)) - ? (unsigned int) (stats.st_mode & (mode << 3)) >> 3 - : (stats.st_mode & mode)); - - if (granted == mode) - return 0; - - __set_errno (EACCES); - return -1; -} |