From 2cb7e0aaedad73b076ea18c6900b0e86c5760d79 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 15:00:47 +0200 Subject: Adding upstream version 247.3. Signed-off-by: Daniel Baumann --- src/basic/umask-util.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/basic/umask-util.h (limited to 'src/basic/umask-util.h') diff --git a/src/basic/umask-util.h b/src/basic/umask-util.h new file mode 100644 index 0000000..bd7c2bd --- /dev/null +++ b/src/basic/umask-util.h @@ -0,0 +1,26 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +#pragma once + +#include +#include +#include + +#include "macro.h" + +static inline void umaskp(mode_t *u) { + umask(*u & 0777); +} + +#define _cleanup_umask_ _cleanup_(umaskp) + +/* We make use of the fact here that the umask() concept is using only the lower 9 bits of mode_t, although + * mode_t has space for the file type in the bits further up. We simply OR in the file type mask S_IFMT to + * distinguish the first and the second iteration of the RUN_WITH_UMASK() loop, so that we can run the first + * one, and exit on the second. */ + +assert_cc((S_IFMT & 0777) == 0); + +#define RUN_WITH_UMASK(mask) \ + for (_cleanup_umask_ mode_t _saved_umask_ = umask(mask) | S_IFMT; \ + FLAGS_SET(_saved_umask_, S_IFMT); \ + _saved_umask_ &= 0777) -- cgit v1.2.3