sigdelset¶

Synopsis¶

#include <signal.h>

int sigdelset(sigset_t *set, int signo);

Status¶

Implemented

Conformance¶

IEEE Std 1003.1-2017

Description¶

The sigdelset() function deletes the individual signal specified by signo from the signal set pointed to by set.

Applications should 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, sigdelset() shall return 0; otherwise, it shall return -1 and set errno to indicate the error.

Errors¶

The sigdelset() function may fail if:

EINVAL - The signo argument is not a valid signal number, or is an unsupported signal number.

POSIX deviations¶

No POSIX deviations discovered.