FreeBSD Manual Pages
SIGSETOPS(3) BSD Library Functions Manual SIGSETOPS(3) NAME sigemptyset, sigfillset, sigaddset, sigdelset, sigismember -- manipulate 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 sig- nal set. The sigismember() function returns whether a specified signal signo is contained in the signal set. These functions are provided as macros in the include file <signal.h>. Actual functions are available if their names are undefined (with #undef name). RETURN VALUES The sigismember() function returns 1 if the signal is a member of the set, 0 otherwise. The other functions return 0. ERRORS Currently no errors are detected. SEE ALSO kill(2), sigaction(2), sigsuspend(2) STANDARDS These functions are defined by IEEE Std 1003.1-1988 ("POSIX.1"). BSD June 4, 1993 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS
Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=sigsetops&sektion=3&manpath=FreeBSD+4.11-RELEASE>