Mercurial > gnulib
view lib/mknodat.c @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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/* Create an inode relative to an open directory. Copyright (C) 2009-2019 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 <https://www.gnu.org/licenses/>. */ /* written by Eric Blake */ #include <config.h> #include <sys/stat.h> #if !HAVE_MKNOD # include <errno.h> /* Mingw lacks mknod, so this wrapper is trivial. */ int mknodat (int fd _GL_UNUSED, char const *path _GL_UNUSED, mode_t mode _GL_UNUSED, dev_t dev _GL_UNUSED) { errno = ENOSYS; return -1; } #else /* Create a file system node FILE relative to directory FD, with access permissions and file type in MODE, and device type in DEV. Usually, non-root applications can only create named fifos, with DEV set to 0. If possible, create the node without changing the working directory. Otherwise, resort to using save_cwd/fchdir, then mknod/restore_cwd. If either the save_cwd or the restore_cwd fails, then give a diagnostic and exit nonzero. */ # define AT_FUNC_NAME mknodat # define AT_FUNC_F1 mknod # define AT_FUNC_POST_FILE_PARAM_DECLS , mode_t mode, dev_t dev # define AT_FUNC_POST_FILE_ARGS , mode, dev # 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 #endif