diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/openat.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/openat.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/sysdeps/unix/sysv/linux/openat.c b/sysdeps/unix/sysv/linux/openat.c deleted file mode 100644 index df53b6cf2c..0000000000 --- a/sysdeps/unix/sysv/linux/openat.c +++ /dev/null @@ -1,175 +0,0 @@ -/* Copyright (C) 2005, 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 <stdarg.h> -#include <stddef.h> -#include <stdio.h> -#include <string.h> -#include <sys/stat.h> -#include <kernel-features.h> -#include <sysdep-cancel.h> -#include <not-cancel.h> - - -#ifndef OPENAT -# define OPENAT openat - -# ifndef __ASSUME_ATFCTS -/* Set errno after a failed call. If BUF is not null, - it is a /proc/self/fd/ path name we just tried to use. */ -void -attribute_hidden -__atfct_seterrno (int errval, int fd, const char *buf) -{ - if (buf != NULL) - { - struct stat64 st; - - if (errval == ENOTDIR || errval == ENOENT) - { - /* This can mean either the file descriptor is invalid or - /proc is not mounted. */ - if (__fxstat64 (_STAT_VER, fd, &st) != 0) - /* errno is already set correctly. */ - return; - - /* If /proc is not mounted there is nothing we can do. */ - if ((errval != ENOTDIR || S_ISDIR (st.st_mode)) - && (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0 - || !S_ISDIR (st.st_mode))) - errval = ENOSYS; - } - } - - __set_errno (errval); -} - -int __have_atfcts; -# endif -#endif - - -#define OPENAT_NOT_CANCEL CONCAT (OPENAT) -#define CONCAT(name) CONCAT2 (name) -#define CONCAT2(name) __##name##_nocancel - - -int -OPENAT_NOT_CANCEL (fd, file, oflag, mode) - int fd; - const char *file; - int oflag; - mode_t mode; -{ - - /* We have to add the O_LARGEFILE flag for openat64. */ -#ifdef MORE_OFLAGS - oflag |= MORE_OFLAGS; -#endif - - INTERNAL_SYSCALL_DECL (err); - int res; - -#ifdef __NR_openat -# ifndef __ASSUME_ATFCTS - if (__have_atfcts >= 0) -# endif - { - res = INLINE_SYSCALL (openat, 4, fd, file, oflag, mode); - -# ifndef __ASSUME_ATFCTS - if (res == -1 && errno == ENOSYS) - __have_atfcts = -1; - else -# endif - return res; - } -#endif - -#ifndef __ASSUME_ATFCTS - 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); - - /* Note: snprintf cannot be canceled. */ - __snprintf (buf, buflen, procfd, fd, file); - file = buf; - } - - res = INTERNAL_SYSCALL (open, err, 3, file, oflag, mode); - - if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (res, err), 0)) - { - __atfct_seterrno (INTERNAL_SYSCALL_ERRNO (res, err), fd, buf); - res = -1; - } - - return res; -#endif -} - -#define UNDERIZE(name) UNDERIZE_1 (name) -#define UNDERIZE_1(name) __##name -#define __OPENAT UNDERIZE (OPENAT) - - -/* Open FILE with access OFLAG. Interpret relative paths relative to - the directory associated with FD. If OFLAG includes O_CREAT, a - third argument is the file protection. */ -int -__OPENAT (fd, file, oflag) - int fd; - const char *file; - int oflag; -{ - mode_t mode = 0; - if (oflag & O_CREAT) - { - va_list arg; - va_start (arg, oflag); - mode = va_arg (arg, mode_t); - va_end (arg); - } - - if (SINGLE_THREAD_P) - return OPENAT_NOT_CANCEL (fd, file, oflag, mode); - - int oldtype = LIBC_CANCEL_ASYNC (); - - int res = OPENAT_NOT_CANCEL (fd, file, oflag, mode); - - LIBC_CANCEL_RESET (oldtype); - - return res; -} -libc_hidden_def (__OPENAT) -weak_alias (__OPENAT, OPENAT) |