diff options
Diffstat (limited to 'gnulib/lib/symlinkat.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/symlinkat.c | 76 |
2 files changed, 76 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/symlinkat.c b/gnulib/lib/symlinkat.c new file mode 100644 index 0000000..fc5bb52 --- /dev/null +++ b/gnulib/lib/symlinkat.c @@ -0,0 +1,76 @@ +/* Create a symlink relative to an open directory. + 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/>. */ + +/* written by Eric Blake */ + +#include <config.h> + +#include <unistd.h> + +#if !HAVE_SYMLINK +/* Mingw lacks symlink, and it is more efficient to provide a trivial + wrapper than to go through at-func.c to call rpl_symlink. */ + +# include <errno.h> + +int +symlinkat (char const *path1 _GL_UNUSED, int fd _GL_UNUSED, + char const *path2 _GL_UNUSED) +{ + errno = ENOSYS; + return -1; +} + +#else /* HAVE_SYMLINK */ + +/* Our openat helper functions expect the directory parameter first, + not second. These shims make life easier. */ + +/* Like symlink, but with arguments reversed. */ +static int +symlink_reversed (char const *file, char const *contents) +{ + return symlink (contents, file); +} + +/* Like symlinkat, but with arguments reversed. */ + +static int +symlinkat_reversed (int fd, char const *file, char const *contents); + +# define AT_FUNC_NAME symlinkat_reversed +# define AT_FUNC_F1 symlink_reversed +# define AT_FUNC_POST_FILE_PARAM_DECLS , char const *contents +# define AT_FUNC_POST_FILE_ARGS , contents +# include "at-func.c" +# undef AT_FUNC_NAME +# undef AT_FUNC_F1 +# undef AT_FUNC_POST_FILE_PARAM_DECLS +# undef AT_FUNC_POST_FILE_ARGS + +/* Create a symlink FILE, in the directory open on descriptor FD, + holding CONTENTS. If possible, do it without changing the + working directory. Otherwise, resort to using save_cwd/fchdir, + then symlink/restore_cwd. If either the save_cwd or the restore_cwd + fails, then give a diagnostic and exit nonzero. */ + +int +symlinkat (char const *contents, int fd, char const *file) +{ + return symlinkat_reversed (fd, file, contents); +} + +#endif /* HAVE_SYMLINK */ |