From e9be59e1502a41bab9891d96d753102a7dafef0b Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 08:40:13 +0200 Subject: Adding upstream version 1.0.12. Signed-off-by: Daniel Baumann --- lib/clplumbing/mkstemp_mode.c | 56 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 lib/clplumbing/mkstemp_mode.c (limited to 'lib/clplumbing/mkstemp_mode.c') diff --git a/lib/clplumbing/mkstemp_mode.c b/lib/clplumbing/mkstemp_mode.c new file mode 100644 index 0000000..69c080b --- /dev/null +++ b/lib/clplumbing/mkstemp_mode.c @@ -0,0 +1,56 @@ +/* + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include +#include +#include +#include +#include +#include + + +/* + * A slightly safer version of mkstemp(3) + * + * In this version, the file is initially created mode 0, and then chmod-ed + * to the requested permissions. This guarantees that the file is never + * open to others beyond the specified permissions at any time. + */ +int +mkstemp_mode(char* template, mode_t filemode) +{ + + mode_t maskval; + int fd; + + maskval = umask(0777); + + /* created file should now be mode 0000 */ + fd = mkstemp(template); + + umask(maskval); /* cannot fail :-) */ + + if (fd >= 0) { + if (chmod(template, filemode) < 0) { + int save = errno; + close(fd); + errno = save; + fd = -1; + } + } + return fd; +} -- cgit v1.2.3