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| author | Ulrich Drepper <drepper@redhat.com> | 2002-04-14 20:15:40 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2002-04-14 20:15:40 +0000 |
| commit | 08f600749ecfeedfcd70c4dd8d0a9fa6c4380a1c (patch) | |
| tree | b6f1e16464e572ea28deb01a7db8d6850d64b8b3 /sysdeps/generic/check_fds.c | |
| parent | f83af095b6fc49de3914f4426202171341783277 (diff) | |
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Update.
* include/sys/socket.h: Declare __libc_sa_len_internal and define
SA_LEN macro to use it if not NOT_IN_libc.
* sysdeps/unix/sysv/linux/sa_len.c: Use INTDEF for __libc_sa_len.
* include/fcntl.h: Declare __open_internal and define __open and
__libc_open macros if not NOT_IN_libc.
* sysdeps/generic/open.c: Use INTDEF for __open.
* sysdeps/mach/hurd/open.c: Likewise.
* sysdeps/unix/sysv/aix/open.c: Likewise.
* sysdeps/unix/syscalls.list: Add __open_internal alias.
* sysdeps/generic/check_fds.c: Make sure newly opened file descriptor
has correct number.
* include/fcntl.h: Define __libc_fcntl macro if not NOT_IN_libc.
* sysdeps/mach/hurd/fcntl.c: Undefine __libc_fcntl as well.
* sysdeps/unix/sysv/aix/fcntl.c: Likewise.
* sysdeps/unix/sysv/linux/i386/fcntl.c: Likewise.
* include/wctype.h: Declare __iswalpha_l_internal,
__iswdigit_l_internal, __iswspace_l_internal,
__iswxdigit_l_internal, and __iswctype_internal. Define
__iswalpha_l, __iswctype, __iswdigit_l, __iswspace_l, and
__iswxdigit_l macros if not NOT_IN_libc.
* wctype/iswctype.c: Use INTDEF for __iswctype.
* wctype/wcfuncs_l.c: Use INTDEF for all __iswXXX_l.
Diffstat (limited to 'sysdeps/generic/check_fds.c')
| -rw-r--r-- | sysdeps/generic/check_fds.c | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/sysdeps/generic/check_fds.c b/sysdeps/generic/check_fds.c index 083b72de16..ff9562de08 100644 --- a/sysdeps/generic/check_fds.c +++ b/sysdeps/generic/check_fds.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2000 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2002 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 @@ -50,9 +50,13 @@ check_one_fd (int fd, int mode) int nullfd = __libc_open (_PATH_DEVNULL, mode); /* We are very paranoid here. With all means we try to ensure that we are actually opening the /dev/null device and nothing - else. */ - if (__builtin_expect (nullfd, 0) == -1 - || __builtin_expect (__fxstat64 (_STAT_VER, nullfd, &st), 0) != 0 + else. + + Note that the following code assumes that STDIN_FILENO, + STDOUT_FILENO, STDERR_FILENO are the three lowest file + decsriptor numbers, in this order. */ + if (__builtin_expect (nullfd != fd, 0) + || __builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) != 0 || __builtin_expect (S_ISCHR (st.st_mode), 1) == 0 #if defined DEV_NULL_MAJOR && defined DEV_NULL_MINOR || st.st_rdev != makedev (DEV_NULL_MAJOR, DEV_NULL_MINOR) @@ -72,7 +76,7 @@ __libc_check_standard_fds (void) { /* This is really paranoid but some people actually are. If /dev/null should happen to be a symlink to somewhere else and not the device - commonly known as "/dev/null" be bail out. We can detect this with + commonly known as "/dev/null" we bail out. We can detect this with the O_NOFOLLOW flag for open() but only on some system. */ #ifndef O_NOFOLLOW # define O_NOFOLLOW 0 |