diff options
| -rw-r--r-- | ChangeLog | 20 | ||||
| -rw-r--r-- | debug/Makefile | 3 | ||||
| -rw-r--r-- | debug/Versions | 3 | ||||
| -rw-r--r-- | debug/readlinkat_chk.c | 31 | ||||
| -rw-r--r-- | debug/tst-chk1.c | 30 | ||||
| -rw-r--r-- | include/unistd.h | 1 | ||||
| -rw-r--r-- | io/readlinkat.c | 1 | ||||
| -rw-r--r-- | posix/bits/unistd.h | 22 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/readlinkat.c | 1 |
9 files changed, 107 insertions, 5 deletions
diff --git a/ChangeLog b/ChangeLog index c4813a3b68..5439032761 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,20 @@ +2006-04-24 Jakub Jelinek <jakub@redhat.com> + + * posix/bits/unistd.h (__readlinkat_chk): New prototype. + (__readlinkat_alias): New alias. + (readlinkat): New inline function. + * include/unistd.h (readlinkat): Add libc_hidden_proto. + * sysdeps/unix/sysv/linux/readlinkat.c (readlinkat): Add + libc_hidden_def. + * io/readlinkat.c (readlinkat): Likewise. + * debug/readlinkat_chk.c: New file. + * debug/Makefile (routines): Add readlinkat_chk. + * debug/Versions (libc): Export __readlinkat_chk@@GLIBC_2.5. + * debug/tst-chk1.c (do_test): Add readlinkat tests. + 2006-04-23 Ulrich Drepper <drepper@redhat.com> - * nis/nss_nisplus/nisplus-netgrp.c: Cleanups. + * nis/nss_nisplus/nisplus-netgrp.c: Cleanups. [BZ #1951] * sysdeps/posix/sigset.c (sigset): Return correct value reflecting @@ -37,13 +51,13 @@ * sysdeps/unix/sysv/linux/kernel-features.h: Define __ASSUME_PROC_SELF_FD_SYMLINK. * sysdeps/unix/sysv/linux/ttyname.c: Cleanups. Avoid compatibility - code if possible. Move compatibility code in .text.compat section. + code is possible. Move compatibility code in .text.compat section. * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise. 2006-04-18 Ulrich Drepper <drepper@redhat.com> * sysdeps/posix/getaddrinfo.c (getaddrinfo): Rewrite to avoid loop - over gaih array. There is only on function to call in the moment. + over gaih array. There is only one function to call in the moment. 2006-04-16 Ulrich Drepper <drepper@redhat.com> diff --git a/debug/Makefile b/debug/Makefile index 9123bf65b5..4b4b541ba7 100644 --- a/debug/Makefile +++ b/debug/Makefile @@ -31,7 +31,8 @@ routines = backtrace backtracesyms backtracesymsfd noophooks \ printf_chk fprintf_chk vprintf_chk vfprintf_chk \ gets_chk chk_fail readonly-area fgets_chk fgets_u_chk \ read_chk pread_chk pread64_chk recv_chk recvfrom_chk \ - readlink_chk getwd_chk getcwd_chk realpath_chk ptsname_r_chk \ + readlink_chk readlinkat_chk getwd_chk getcwd_chk \ + realpath_chk ptsname_r_chk \ wctomb_chk wcscpy_chk wmemcpy_chk wmemmove_chk wmempcpy_chk \ wcpcpy_chk wcsncpy_chk wcscat_chk wcsncat_chk wmemset_chk \ wcpncpy_chk \ diff --git a/debug/Versions b/debug/Versions index 683eb17d09..5c87af27c1 100644 --- a/debug/Versions +++ b/debug/Versions @@ -36,4 +36,7 @@ libc { __stack_chk_fail; } + GLIBC_2.5 { + __readlinkat_chk; + } } diff --git a/debug/readlinkat_chk.c b/debug/readlinkat_chk.c new file mode 100644 index 0000000000..eab99c0ea9 --- /dev/null +++ b/debug/readlinkat_chk.c @@ -0,0 +1,31 @@ +/* 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 <unistd.h> +#include <sys/param.h> + + +ssize_t +__readlinkat_chk (int fd, const char *path, void *buf, size_t len, + size_t buflen) +{ + if (len > buflen) + __chk_fail (); + + return readlinkat (fd, path, buf, len); +} diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c index ee080cef49..993dab63b2 100644 --- a/debug/tst-chk1.c +++ b/debug/tst-chk1.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2004, 2005 Free Software Foundation, Inc. +/* Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Jakub Jelinek <jakub@redhat.com>, 2004. @@ -944,6 +944,34 @@ do_test (void) CHK_FAIL_END #endif + int tmpfd = open ("/tmp", O_RDONLY | O_DIRECTORY); + if (tmpfd < 0) + FAIL (); + + if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf, 4) != 3 + || memcmp (readlinkbuf, "bar", 3) != 0) + FAIL (); + if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 1, + l0 + 3) != 3 + || memcmp (readlinkbuf, "bbar", 4) != 0) + FAIL (); + +#if __USE_FORTIFY_LEVEL >= 1 + CHK_FAIL_START + if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 2, + l0 + 3) != 3) + FAIL (); + CHK_FAIL_END + + CHK_FAIL_START + if (readlinkat (tmpfd, fname + sizeof ("/tmp/") - 1, readlinkbuf + 3, + 4) != 3) + FAIL (); + CHK_FAIL_END +#endif + + close (tmpfd); + char *cwd1 = getcwd (NULL, 0); if (cwd1 == NULL) FAIL (); diff --git a/include/unistd.h b/include/unistd.h index 670cb324ae..f8f15ed019 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -15,6 +15,7 @@ libc_hidden_proto (getlogin_r) libc_hidden_proto (seteuid) libc_hidden_proto (setegid) libc_hidden_proto (tcgetpgrp) +libc_hidden_proto (readlinkat) /* Now define the internal interfaces. */ extern int __access (__const char *__name, int __type); diff --git a/io/readlinkat.c b/io/readlinkat.c index 483dc4914d..7e6a2227d8 100644 --- a/io/readlinkat.c +++ b/io/readlinkat.c @@ -46,5 +46,6 @@ readlinkat (fd, path, buf, len) return -1; } stub_warning (readlinkat) +libc_hidden_def (readlinkat) #include <stub-tag.h> diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h index d461108e53..96f26d5482 100644 --- a/posix/bits/unistd.h +++ b/posix/bits/unistd.h @@ -100,6 +100,28 @@ __NTH (readlink (__const char *__restrict __path, char *__restrict __buf, } #endif +#ifdef __USE_ATFILE +extern ssize_t __readlinkat_chk (int __fd, __const char *__restrict __path, + char *__restrict __buf, size_t __len, + size_t __buflen) + __THROW __nonnull ((2, 3)) __wur; +extern ssize_t __REDIRECT_NTH (__readlinkat_alias, + (int __fd, __const char *__restrict __path, + char *__restrict __buf, size_t __len), + readlinkat) + __nonnull ((2, 3)) __wur; + +extern __always_inline __nonnull ((2, 3)) __wur ssize_t +__NTH (readlinkat (int __fd, __const char *__restrict __path, + char *__restrict __buf, size_t __len)) +{ + if (__bos (__buf) != (size_t) -1 + && (!__builtin_constant_p (__len) || __len > __bos (__buf))) + return __readlinkat_chk (__fd, __path, __buf, __len, __bos (__buf)); + return __readlinkat_alias (__fd, __path, __buf, __len); +} +#endif + extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen) __THROW __wur; extern char *__REDIRECT_NTH (__getcwd_alias, diff --git a/sysdeps/unix/sysv/linux/readlinkat.c b/sysdeps/unix/sysv/linux/readlinkat.c index 9b4a730c0e..1361596503 100644 --- a/sysdeps/unix/sysv/linux/readlinkat.c +++ b/sysdeps/unix/sysv/linux/readlinkat.c @@ -87,3 +87,4 @@ readlinkat (fd, path, buf, len) return result; #endif } +libc_hidden_def (readlinkat) |