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(), orsigwaitinfo()`, 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

See Also

  1. Standard library functions
  2. Table of Contents