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c37475dcbc
This should avoid strange behavior due to races when the parent has resumed but the child is still running the exec* code in libc, which mainly manifests itself when running at low speed. We also change to signaling the child's completion with SIGALRM, and setting an extra alarm in the parent in case the child doesn't actually do it.
56 lines
1015 B
C
56 lines
1015 B
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(int sigs, void (*f)(int))
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{
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int sig_no = 0;
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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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