SIGSETOPS(3) Library Functions Manual SIGSETOPS(3) sigemptyset, sigfillset, sigaddset, sigdelset, sigismember - POSIX LIBRARY Standard C library (libc, -lc) #include int sigemptyset(sigset_t *set); int sigfillset(sigset_t *set); int sigaddset(sigset_t *set, int signum); int sigdelset(sigset_t *set, int signum); int sigismember(const sigset_t *set, int signum); glibc (. feature_test_macros(7)): sigemptyset(), sigfillset(), sigaddset(), sigdelset(), sigismember(): _POSIX_C_SOURCE POSIX. sigemptyset() , set, , . sigfillset() set , . sigaddset() sigdelset(), , signum set. sigismember() , signum set. Objects of type sigset_t must be initialized by a call to either sigemptyset() or sigfillset() before being passed to the functions sigaddset(), sigdelset(), and sigismember() or the additional glibc functions described below (sigisemptyset(), sigandset(), and sigorset()). The results are undefined if this is not done. sigemptyset(), sigfillset(), sigaddset() sigdelset() 0 -1 . sigismember() 1, signum set, 0, signum -1 . On error, these functions set errno to indicate the error. EINVAL signum . attributes(7). +----------------------------+----------------------------------------------------------+--------------------------+ | | | | +----------------------------+----------------------------------------------------------+--------------------------+ |sigemptyset(), | | MT-Safe | |sigfillset(), sigaddset(), | | | |sigdelset(), sigismember(), | | | |sigisemptyset(), | | | |sigorset(), sigandset() | | | +----------------------------+----------------------------------------------------------+--------------------------+ GNU _GNU_SOURCE, : int sigisemptyset(const sigset_t *set); int sigorset(sigset_t *dest, const sigset_t *left, const sigset_t *right); int sigandset(sigset_t *dest, const sigset_t *left, const sigset_t *right); sigisemptyset() 1, set 0 . sigorset() left right dest. sigandset() left right dest. 0 -1 . ( ) . POSIX.1-2008. POSIX.1-2001. glibc sigfillset() , NPTL. nptl(7). . sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2) Alexander Golubev , Azamat Hackimov , Hotellook, Nikita , Spiros Georgaras , Vladislav , Yuri Kozlov ; GNU 3 , . . , , . Linux man-pages 6.06 31 2023 . SIGSETOPS(3)