SCO OpenServer

signal(D3oddi)

signal -- send a signal to a process group

Synopsis

#include <sys/signal.h>

void signal(int pgrp, int signum);

Description

The signal( ) function sends the specified signal to all processes in the specified process group.

Arguments

pgrp: Integer that specifies the process group number. At task time, pgrp is one of the two equivalent integers u.u_procp->p_pgrp or u.u_ttyp->t_pgrp. If you wish to be able to terminate a process group at interrupt time, store the pgrp ID in a global variable.
signum: Signal number to be sent.

Return values

None.

Usage

Context and synchronization

All contexts.

Hardware applicability

All

Version applicability

oddi: 1, 2, 2mp, 3, 3mp, 4, 4mp, 5, 5mp, 6, 6mp

SVR5 DDI compatibility

Current DDI versions do not support an equivalent function. signal( ) is mostly used for TTY drivers, which are implemented as STREAMS drivers in DDI, and so use the M_SIG(D7str) and M_PCSIG(D7str) message types to post signals.

Use the DDI proc_signal(D3) function to send a signal to a process that is blocked with a SV_WAIT_SIG(D3) or SLEEP_LOCK_SIG(D3) call at the time the signal is posted.

References

psignal(D3oddi)