NAME¶

sig - signal interface routines

SYNOPSIS¶

#include <ast.h> #include <sig.h>

int sigunblock(int sig); int sigcritical(int op);

DESCRIPTION¶

sigunblock is called to unblocks the signal sig from within a handler currently servicing sig.

sigcritical controls a critical region for the SIGINT, SIGQUIT and SIGHUP signals. op > 0 pushes the region, op == 0 pops the region, and op < 0 returns non-zero if any signals are being held in the current critical region. Signal critical regions may be nested. The current critical region level is returned, -1 on error.

SEE ALSO¶

signal(2)