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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Rob Landley
* Copyright (C) 2006 Denys Vlasenko
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
/* Saves 2 bytes on x86! Oh my... */
int sigaction_set(int signum, const struct sigaction *act)
{
return sigaction(signum, act, NULL);
}
int sigprocmask_allsigs(int how)
{
sigset_t set;
sigfillset(&set);
return sigprocmask(how, &set, NULL);
}
void bb_signals(int sigs, void (*f)(int))
{
int sig_no = 0;
int bit = 1;
while (sigs) {
if (sigs & bit) {
sigs &= ~bit;
signal(sig_no, f);
}
sig_no++;
bit <<= 1;
}
}
void bb_signals_recursive(int sigs, void (*f)(int))
{
int sig_no = 0;
int bit = 1;
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = f;
/*sa.sa_flags = 0;*/
/*sigemptyset(&sa.sa_mask); - hope memset did it*/
while (sigs) {
if (sigs & bit) {
sigs &= ~bit;
sigaction_set(sig_no, &sa);
}
sig_no++;
bit <<= 1;
}
}
void sig_block(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_BLOCK, &ss, NULL);
}
void sig_unblock(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_UNBLOCK, &ss, NULL);
}
void wait_for_any_sig(void)
{
sigset_t ss;
sigemptyset(&ss);
sigsuspend(&ss);
}
/* Assuming the sig is fatal */
void kill_myself_with_sig(int sig)
{
signal(sig, SIG_DFL);
sig_unblock(sig);
raise(sig);
_exit(EXIT_FAILURE); /* Should not reach it */
}
void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int))
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
/*sigemptyset(&sa.sa_mask);*/
sa.sa_flags = SA_RESTART;
sa.sa_handler = handler;
sigaction_set(sig, &sa);
}
void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int))
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
/*sigemptyset(&sa.sa_mask);*/
/*sa.sa_flags = 0;*/
sa.sa_handler = handler;
sigaction_set(sig, &sa);
}
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