diff options
author | Jakub Jelinek <jakub@redhat.com> | 2006-01-30 09:30:09 +0000 |
---|---|---|
committer | Jakub Jelinek <jakub@redhat.com> | 2006-01-30 09:30:09 +0000 |
commit | 3e543bc56346540cbf73fd48d0172fc6a588efd5 (patch) | |
tree | b2c3502b6596d238ac861cc82cafdc6f8b84e143 /sysdeps/unix/sysv/linux/openat.c | |
parent | 06f313e361a523605ba6d4c9cdc67a7353cd367c (diff) |
Updated to fedora-glibc-20060130T0922
Diffstat (limited to 'sysdeps/unix/sysv/linux/openat.c')
-rw-r--r-- | sysdeps/unix/sysv/linux/openat.c | 108 |
1 files changed, 79 insertions, 29 deletions
diff --git a/sysdeps/unix/sysv/linux/openat.c b/sysdeps/unix/sysv/linux/openat.c index d5d976cbc4..67e9df2e45 100644 --- a/sysdeps/unix/sysv/linux/openat.c +++ b/sysdeps/unix/sysv/linux/openat.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2005 Free Software Foundation, Inc. +/* 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 @@ -23,36 +23,54 @@ #include <stdio.h> #include <string.h> #include <sys/stat.h> +#include <kernel-features.h> #include <sysdep-cancel.h> -#ifndef OPENAT +#if !defined OPENAT && !defined __ASSUME_ATFCTS # define OPENAT openat -# define MORE_OFLAGS 0 void attribute_hidden __atfct_seterrno (int errval, int fd, const char *buf) { - if (buf != NULL && errval == ENOTDIR) + if (buf != NULL) { - /* This can mean either the file descriptor is invalid or - /proc is not mounted. */ struct stat64 st; - 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 (S_ISDIR (st.st_mode) - && (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0 - || !S_ISDIR (st.st_mode))) - errval = ENOSYS; + + if (errval == ENOTDIR) + { + /* 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 (S_ISDIR (st.st_mode) + && (__xstat64 (_STAT_VER, "/proc/self/fd", &st) != 0 + || !S_ISDIR (st.st_mode))) + errval = ENOSYS; + } + else if (errval == ENOENT) + { + /* This could mean the file descriptor is not valid. We + reuse BUF for the stat call. Find the slash after the + file descriptor number. */ + *(char *) strchr (buf + sizeof "/proc/self/fd", '/') = '\0'; + + int e = __lxstat64 (_STAT_VER, buf, &st); + if ((e == -1 && errno == ENOENT) + ||(e == 0 && !S_ISLNK (st.st_mode))) + errval = EBADF; + } } __set_errno (errval); } + +int __have_atfcts; #endif /* Open FILE with access OFLAG. Interpret relative paths relative to @@ -64,6 +82,49 @@ OPENAT (fd, file, oflag) 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); + } + + /* 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 + { + if (SINGLE_THREAD_P) + res = INLINE_SYSCALL (openat, 4, fd, file, oflag, mode); + else + { + int oldtype = LIBC_CANCEL_ASYNC (); + + res = INLINE_SYSCALL (openat, 4, fd, file, oflag, mode); + + LIBC_CANCEL_RESET (oldtype); + } + +# 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] != '/') @@ -84,25 +145,13 @@ OPENAT (fd, file, oflag) file = buf; } - mode_t mode = 0; - if (oflag & O_CREAT) - { - va_list arg; - va_start (arg, oflag); - mode = va_arg (arg, mode_t); - va_end (arg); - } - - INTERNAL_SYSCALL_DECL (err); - int res; - if (SINGLE_THREAD_P) - res = INTERNAL_SYSCALL (open, err, 3, file, oflag | MORE_OFLAGS, mode); + res = INTERNAL_SYSCALL (open, err, 3, file, oflag, mode); else { int oldtype = LIBC_CANCEL_ASYNC (); - res = INTERNAL_SYSCALL (open, err, 3, file, oflag | MORE_OFLAGS, mode); + res = INTERNAL_SYSCALL (open, err, 3, file, oflag, mode); LIBC_CANCEL_RESET (oldtype); } @@ -114,4 +163,5 @@ OPENAT (fd, file, oflag) } return res; +#endif } |