sigismember()

See if a given signal is in a given set

Synopsis:

#include <signal.h>

int sigismember( const sigset_t *set,
                 int signo );

Arguments:

set
A pointer to the sigset_t object that you want to check.
signo
The signal that you want to check for membership in the set. For more information, see "POSIX signals" in the documentation for SignalAction().

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The sigismember() function tests if signo is in the set pointed to by set.

Returns:

1
The signo is in the set.
0
The signo isn't in the set.
-1
An error occurred (errno is set).

Errors:

EINVAL
The signal signo isn't valid.

Examples:

See sigemptyset().

Classification:

POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler Yes
Signal handler Yes
Thread Yes