sigaddset()

add signal to signal set 

Function

SYNOPSIS

#include <signal.h>

int sigaddset(sigset_t *set, int signo);

DESCRIPTION

The sigaddset() function manipulates sets of signals. It operates on data objects that the application addresses. It does not operate on any set of signals known to the system (such as the set blocked from delivery to a process or the set pending for a process).

sigaddset() adds the individual signal specified by the value of signo to the signal set that set points to.

PARAMETERS

set 

Points to the signal set to which sigaddset() adds the individual signal.

signo 

Specifies the value of the individual signal that sigaddset() adds to the signal set.

RETURN VALUES

If successful, sigaddset() returns zero. On failure, it returns a value of -1 and sets errno to one of the following values:

EFAULT 

set is an invalid pointer.

EINVAL 

The value of signo is an invalid or unsupported signal number.

CONFORMANCE

POSIX.1 (1996).

MULTITHREAD SAFETY LEVEL

Async-signal-safe.

PORTING ISSUES

None.

AVAILABILITY

PTC MKS Toolkit for Professional Developers
PTC MKS Toolkit for Professional Developers 64-Bit Edition
PTC MKS Toolkit for Enterprise Developers
PTC MKS Toolkit for Enterprise Developers 64-Bit Edition

SEE ALSO

api_intro

Functions:
pthread_sigmask(), sigaction(), sigdelset(), sigemptyset(), sigfillset(), sigismember(), sigprocmask()

PTC MKS Toolkit 10.4 Documentation Build 39.