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author | Paul Eggert <eggert@cs.ucla.edu> | 2011-02-22 11:30:07 -0800 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2011-02-22 11:30:07 -0800 |
commit | ae0d725005539d9259efac6a81ff8fdd45eb69a6 (patch) | |
tree | c721b530409b355281537abc7b058bdb2697ee01 /lib/symlink.c | |
parent | 8d40723d1e9661840a67ca7be9c5b073526ab421 (diff) | |
download | emacs-ae0d725005539d9259efac6a81ff8fdd45eb69a6.tar.gz |
[ChangeLog]
Work around some portability problems with symlinks.
* Makefile.in (GNULIB_MODULES): Add lstat, readlink, symlink.
* configure.in (lstat, HAVE_LSTAT): Remove special hack.
* lib/lstat.c, lib/readlink.c, lib/stat.c, lib/symlink.c:
* m4/dos.m4, m4/lstat.m4, m4/readlink.m4, m4/stat.m4, m4/symlink.m4:
New files, automatically generated from gnulib.
* aclocal.m4, configure, lib/Makefile.in, lib/gnulib.mk:
* lib/stdlib.in.h, m4/gl-comp.m4, m4/stdlib_h.m4: Regenerate.
2011-02-22 Paul Eggert <eggert@cs.ucla.edu>
[src/ChangeLog]
Work around some portability problems with symlinks.
* fileio.c (Frename_file, Fmake_symbolic_link, Ffile_symlink_p):
Simplify the code by assuming that the readlink and symlink calls
exist, even if they always fail on this host.
(Ffile_readable_p): Likewise, for fifos.
* config.in: Regenerate.
Diffstat (limited to 'lib/symlink.c')
-rw-r--r-- | lib/symlink.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/lib/symlink.c b/lib/symlink.c new file mode 100644 index 00000000000..2896cc9655b --- /dev/null +++ b/lib/symlink.c @@ -0,0 +1,57 @@ +/* Stub for symlink(). + Copyright (C) 2009-2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include <unistd.h> + +#include <errno.h> +#include <string.h> +#include <sys/stat.h> + + +#if HAVE_SYMLINK + +# undef symlink + +/* Create a symlink, but reject trailing slash. */ +int +rpl_symlink (char const *contents, char const *name) +{ + size_t len = strlen (name); + if (len && name[len - 1] == '/') + { + struct stat st; + if (lstat (name, &st) == 0) + errno = EEXIST; + return -1; + } + return symlink (contents, name); +} + +#else /* !HAVE_SYMLINK */ + +/* The system does not support symlinks. */ +int +symlink (char const *contents _GL_UNUSED, + char const *name _GL_UNUSED) +{ + errno = ENOSYS; + return -1; +} + +#endif /* !HAVE_SYMLINK */ |