ADC Home > Reference Library > Reference > Mac OS X > Mac OS X Man Pages
|
This document is a Mac OS X manual page. Manual pages are a command-line technology for providing documentation. You can view these manual pages locally using the man(1) command. These manual pages come from many different sources, and thus, have a variety of writing styles. For more information about the manual page format, see the manual page for manpages(5). |
SIGSETOPS(3) BSD Library Functions Manual SIGSETOPS(3) NAME sigaddset, sigdelset, sigemptyset, sigfillset, sigismember -- manipulate signal sets LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <signal.h> int sigaddset(sigset_t *set, int signo); int sigdelset(sigset_t *set, int signo); int sigemptyset(sigset_t *set); int sigfillset(sigset_t *set); 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. signals. 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 signal 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 |