+2015-05-29 Pádraig Brady <P@draigBrady.com>
+
+ linkat: avoid OS X 10.10 trailing slash with symlink bug
+ On Darwin 14.3.0 linkat(,"path1",,"dangling_symlink/",)
+ causes the symlink to be dereferenced, and if it points
+ to a non existent file, that file will be created as
+ a hard link to "path1".
+ This fixes a test failure in test-linkat.c.
+ * m4/linkat.m4 (gl_FUNC_LINKAT): Augment the test with
+ this case. The existing workaround in linkat.c for
+ trailing slash issues, suffices for this case.
+ * doc/posix-functions/linkat.texi: Add OS X 10.10 to
+ the list of platforms with trailing slash issues.
+
2015-05-28 Pádraig Brady <P@draigBrady.com>
unlinkat: handle ignoring of ".." on Darwin 14
@item
This function fails to reject trailing slashes on non-directories on
some platforms:
-AIX 7.1, Solaris 11 2011-11.
+AIX 7.1, Solaris 11 2011-11, Mac OS X 10.10.
@item
This functions does not support @code{AT_SYMLINK_FOLLOW} on some platforms:
Linux kernel 2.6.17.
AC_CACHE_CHECK([whether linkat handles trailing slash correctly],
[gl_cv_func_linkat_slash],
- [rm -rf conftest.a conftest.b conftest.c conftest.d
+ [rm -rf conftest.a conftest.b conftest.c conftest.d conftest.e conftest.s
AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[[#include <unistd.h>
if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.d/",
AT_SYMLINK_FOLLOW) == 0)
result |= 8;
+
+ /* On OS X 10.10 a trailing "/" will cause the second path to be
+ dereferenced, and thus will succeed on a dangling symlink. */
+ if (symlink ("conftest.e", "conftest.s") == 0)
+ {
+ if (linkat (AT_FDCWD, "conftest.a", AT_FDCWD, "conftest.s/",
+ AT_SYMLINK_FOLLOW) == 0)
+ result |= 16;
+ }
+
return result;
]])],
[gl_cv_func_linkat_slash=yes],
*) gl_cv_func_linkat_slash="guessing no";;
esac
])
- rm -rf conftest.a conftest.b conftest.c conftest.d])
+ rm -rf conftest.a conftest.b conftest.c conftest.d conftest.e conftest.s])
case "$gl_cv_func_linkat_slash" in
*yes) gl_linkat_slash_bug=0 ;;
*) gl_linkat_slash_bug=1 ;;