sigblock() block signals	Function
	SYNOPSIS DESCRIPTION PARAMETERS RETURN VALUES CONFORMANCE MULTITHREAD SAFETY LEVEL PORTING ISSUES AVAILABILITY SEE ALSO

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SYNOPSIS

#include <signal.h>

int sigblock(int mask);

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DESCRIPTION

The sigblock() function call causes the signals specified in mask to be added to the set of signals currently being blocked from delivery. Signal j is blocked if the j-th bit in mask is a 1.

SIGKILL and SIGSTOP cannot be blocked.

The previous set of blocked signals is returned.

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PARAMETERS

mask 

Specifies signals to be added to those currently blocked.

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RETURN VALUES

sigblock() returns the old signal mask value.

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CONFORMANCE

4.4BSD.

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MULTITHREAD SAFETY LEVEL

MT-Safe.

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PORTING ISSUES

None.

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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

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SEE ALSO

api_intro

Functions:

sigmask(), signal(), sigsetmask()

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PTC MKS Toolkit 10.4 Documentation Build 39.