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src/basic/umask-util.h
27 строк
957 B
Yu Watanabe
Rename basic-forward.h, sd-forward.h, and shared-forward.h to forward.h
14 июл 2026, 20:18
14 июл 2026, 20:18
01e1303
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/* SPDX-License-Identifier: LGPL-2.1-or-later */ #pragma once #include <sys/stat.h> #include "forward.h" static inline void umaskp(mode_t *u) { umask(*u); } #define _cleanup_umask_ _cleanup_(umaskp) /* We make use of the fact here that the umask() syscall uses 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 WITH_UMASK() loop, so that we can run the first one, * and exit on the second. */ assert_cc((S_IFMT & 0777) == 0); #define WITH_UMASK(mask) \ for (_cleanup_umask_ mode_t _saved_umask_ = umask(mask) | S_IFMT; \ FLAGS_SET(_saved_umask_, S_IFMT); \ _saved_umask_ &= 0777) #define BLOCK_WITH_UMASK(mask) \ _unused_ _cleanup_umask_ mode_t _saved_umask_ = umask(mask);