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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 GPLv2, see file LICENSE in this source tree.
*/
#include "libbb.h"
/* All known arches use small ints for signals */
smallint bb_got_signal;
void record_signo(int signo)
{
bb_got_signal = signo;
}
/* Saves 2 bytes on x86! Oh my... */
int FAST_FUNC sigaction_set(int signum, const struct sigaction *act)
{
return sigaction(signum, act, NULL);
}
int FAST_FUNC sigprocmask_allsigs(int how)
{
sigset_t set;
sigfillset(&set);
return sigprocmask(how, &set, NULL);
}
int FAST_FUNC sigprocmask2(int how, sigset_t *set)
{
// Grr... gcc 8.1.1:
// "passing argument 3 to restrict-qualified parameter aliases with argument 2"
// dance around that...
sigset_t *oset FIX_ALIASING;
oset = set;
return sigprocmask(how, set, oset);
}
void FAST_FUNC 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 FAST_FUNC bb_signals_recursive_norestart(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 FAST_FUNC sig_block(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_BLOCK, &ss, NULL);
}
void FAST_FUNC sig_unblock(int sig)
{
sigset_t ss;
sigemptyset(&ss);
sigaddset(&ss, sig);
sigprocmask(SIG_UNBLOCK, &ss, NULL);
}
void FAST_FUNC wait_for_any_sig(void)
{
sigset_t ss;
sigemptyset(&ss);
sigsuspend(&ss);
}
/* Assuming the sig is fatal */
void FAST_FUNC kill_myself_with_sig(int sig)
{
signal(sig, SIG_DFL);
sig_unblock(sig);
raise(sig);
_exit(sig | 128); /* Should not reach it */
}
void FAST_FUNC 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 FAST_FUNC 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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