* doc/posix-functions/readlink.texi: Mention that OS X 10.10
has this bug.
* doc/posix-functions/readlinkat.texi: Likewise. Also mention
that OS X 10.10 has this function.
* lib/readlinkat.c (rpl_readlinkat): Handle the trailing slash bug,
as done for readlink().
* m4/readlinkat.m4 (gl_FUNC_READLINKAT): Check for the readlink()
trailing slash bug, and assume readlinkat() has the same issue.
Also fix a typo where $gl_cv_decl_readlink_works was tested,
rather than the correct $gl_cv_decl_readlinkat_works.
readlink("link-to-symlink/",buf,len) mistakenly read the contents
of "symlink", rather than failing.
* m4/readlink.m4 (gl_FUNC_READLINK): Also detect FreeBSD bug with
slash on symlink.
* doc/posix-functions/readlink.texi (readlink): Document the bug.
* tests/test-readlink.h (test_readlink): Enhance test.
Signed-off-by: Eric Blake <ebb9@byu.net>
Per comments in areadlink, ERANGE on a too-small buffer is
expected on some platforms; making the readlink module guarantee
GNU behavior of truncated contents is counter-productive, since
we would be duplicating areadlink to learn a-priori how large to
make the buffer, and since truncated contents are not as useful.
* doc/posix-functions/lstat.texi (lstat): Mention that some file
systems have bogus st_size on symlinks, and mention the
areadlink-with-size module.
* doc/posix-functions/fstatat.texi (fstatat): Likewise.
* doc/posix-functions/readlink.texi (readlink): Mention the
areadlink module, and ERANGE failure.
* doc/posix-functions/readlinkat.texi (readlinkat): Likewise.
* tests/test-readlink.c (main): Relax test for AIX, HP-UX.
Signed-off-by: Eric Blake <ebb9@byu.net>
On older systems, readlink returned int instead of ssize_t, making
the use of readlink via function pointer harder.
* m4/readlink.m4 (gl_FUNC_READLINK): Require correct signature.
* lib/unistd.in.h (readlink): Use ssize_t.
* lib/readlink.c (readlink): Likewise.
* m4/unistd_h.m4 (gl_UNISTD_H_DEFAULTS): Add witness.
* modules/unistd (Makefile.am): Substitute it.
* lib/unistd.in.h (readlink): Declare replacement.
* doc/posix-functions/readlink.texi (readlink): Document this.
Signed-off-by: Eric Blake <ebb9@byu.net>
