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SIGSETOPS(3) Library Functions Manual SIGSETOPS(3) NAME sigemptyset, sigfillset, sigaddset, sigdelset, sigismember -- manipu- late signal sets LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <signal.h> int sigemptyset(sigset_t *set); int sigfillset(sigset_t *set); int sigaddset(sigset_t *set, int signo); int sigdelset(sigset_t *set, int signo); int sigismember(const sigset_t *set, int signo); DESCRIPTION These functions manipulate signal sets stored in a sigset_t. Either sigemptyset() or sigfillset() must be called for every object of type sigset_t before any other use of the object. The sigemptyset() function initializes a signal set to be empty. The sigfillset() function initializes a signal set to contain all sig- nals. The sigaddset() function adds the specified signal signo to the signal set. The sigdelset() function deletes the specified signal signo from the signal set. The sigismember() function returns whether a specified signal signo is contained in the signal set. RETURN VALUES The sigismember() function returns 1 if the signal is a member of the set, 0 otherwise. The other functions return 0 upon success. A -1 re- turn value indicates an error occurred and the global variable errno is set to indicate the reason. ERRORS These functions could fail if one of the following occurs: [EINVAL] signo has an invalid value. SEE ALSO kill(2), sigaction(2), sigpending(2), sigprocmask(2), sigsuspend(2) STANDARDS These functions are defined by IEEE Std 1003.1-1988 ("POSIX.1"). FreeBSD 9.2 December 16, 2004 SIGSETOPS(3)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS
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