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authorUlrich Drepper <drepper@redhat.com>2005-07-13 06:09:58 +0000
committerUlrich Drepper <drepper@redhat.com>2005-07-13 06:09:58 +0000
commitb799f91dddb33467760c260e67d9cd86f53a829c (patch)
tree2aed3cc5c3968b4041938f0c4d3146ff45600090 /debug/realpath_chk.c
parent9d653cd1893cdd0a073b8aef3f2d8f7626d778df (diff)
downloadglibc-b799f91dddb33467760c260e67d9cd86f53a829c.tar.gz
* stdlib/bits/stdlib.h: New file.
* stdlib/stdlib.h: Include <bits/stdlib.h> if fortification is requested. * Makefile (headers): Add bits/stdlib.h. * include/bits/stdlib.h: New file. * debug/Depend: New file. * debug/ptsname_r_chk.c: New file. * debug/realpath_chk.c: New file. * debug/wctomb_chk.c: New file. * debug/Makefile (routines): Add ptsname_r_chk, realpath_chk, and wctomb_chk. * debug/Versions: Export __ptsname_r_chk, __realpath_chk, and __wctomb_chk. * debug/tst-chk1.c: Add tests for __ptsname_r_chk, __realpath_chk, and __wctomb_chk.
Diffstat (limited to 'debug/realpath_chk.c')
-rw-r--r--debug/realpath_chk.c60
1 files changed, 60 insertions, 0 deletions
diff --git a/debug/realpath_chk.c b/debug/realpath_chk.c
new file mode 100644
index 0000000000..961aea0b85
--- /dev/null
+++ b/debug/realpath_chk.c
@@ -0,0 +1,60 @@
+/* Copyright (C) 2005 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 <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+char *
+__realpath_chk (const char *buf, char *resolved, size_t resolvedlen)
+{
+#ifdef PATH_MAX
+ if (resolvedlen < PATH_MAX)
+ __chk_fail ();
+
+ return __realpath (buf, resolved);
+#else
+ long int pathmax =__pathconf (buf, _PC_PATH_MAX);
+ if (pathmax != -1)
+ {
+ /* We do have a fixed limit. */
+ if (resolvedlen < pathmax)
+ __chk_fail ();
+
+ return __realpath (buf, resolved);
+ }
+
+ /* Since there is no fixed limit we check whether the size is large
+ enough. */
+ char *res = __realpath (buf, NULL);
+ if (res != NULL)
+ {
+ size_t actlen = strlen (res) + 1;
+ if (actlen > resolvedlen)
+ __chk_fail ();
+
+ memcpy (resolved, res, actlen);
+ free (res);
+ res = resolved;
+ }
+
+ return res;
+#endif
+}