sigaddset#

Synopsis#

#include <signal.h>

int sigaddset(sigset_t *set, int signo);

Status#

Partially implemented

Conformance#

IEEE Std 1003.1-2017

Description#

The sigaddset() function adds the individual signal specified by the signo to the signal set pointed to by set. Applications shall call either sigemptyset() or sigfillset() at least once for each object of type sigset_t prior to any other use of that object. If such an object is not initialized in this way, but is nonetheless supplied as an argument to any of ``pthread_sigmask(), sigaction(), sigaddset(), sigdelset(), sigismember(), sigpending(), sigprocmask(), sigsuspend(), sigtimedwait(), sigwait(), or sigwaitinfo(), the results are undefined.

Return value#

Upon successful completion, sigaddset() shall return 0; otherwise, it shall return -1 and set errno to indicate the error.

Errors#

The sigaddset() function may fail if:

EINVAL - The value of the signo argument is an invalid or unsupported signal number.

Tests#

Untested

Known bugs#

None