mirror of https://github.com/sheumann/hush.git
91 lines
1.6 KiB
C
91 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
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* Copyright (C) 2006 Rob Landley
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* Copyright (C) 2006 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#include "libbb.h"
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/* All known arches use small ints for signals */
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smallint bb_got_signal;
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int FAST_FUNC sigprocmask_allsigs(int how)
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{
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sigset_t set;
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sigfillset(&set);
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return sigprocmask(how, &set, NULL);
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}
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void FAST_FUNC bb_signals(long int sigs, sig_t f)
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{
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int sig_no = 0;
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long int bit = 1;
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while (sigs) {
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if (sigs & bit) {
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sigs -= bit;
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signal(sig_no, f);
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}
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sig_no++;
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bit <<= 1;
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}
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}
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void FAST_FUNC sig_unblock(int sig)
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{
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sigset_t ss;
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sigemptyset(&ss);
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sigaddset(&ss, sig);
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sigprocmask(SIG_UNBLOCK, &ss, NULL);
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}
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/* Assuming the sig is fatal */
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void FAST_FUNC kill_myself_with_sig(int sig)
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{
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signal(sig, SIG_DFL);
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sig_unblock(sig);
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signal_parent_to_resume();
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raise(sig);
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_exit(sig | 128); /* Should not reach it */
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}
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#ifdef __GNO__
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/* Include our own version of sigprocmask, because the one in
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* GNO 2.0.6 libc is broken for SIG_SETMASK and SIG_UNBLOCK cases
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* (it will never unblock any signals). */
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int sigprocmask(int how, const sigset_t *set, sigset_t *oset)
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{
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sigset_t oldmask;
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if (set) {
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switch (how) {
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case SIG_BLOCK:
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oldmask = sigblock(*set);
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break;
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case SIG_SETMASK:
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oldmask = sigsetmask(*set);
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break;
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case SIG_UNBLOCK:
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oldmask = sigblock(0);
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sigsetmask(oldmask & ~*set);
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break;
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default:
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errno = EINVAL;
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return -1;
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}
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} else if (oset) {
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oldmask = sigblock(0);
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}
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if (oset)
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*oset = oldmask;
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return 0;
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}
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#endif
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