93 lines
1.9 KiB
C
93 lines
1.9 KiB
C
/* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */
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/* Copyright (c) 1988 AT&T */
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/* All Rights Reserved */
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/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
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/* UNIX System Laboratories, Inc. */
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/* The copyright notice above does not evidence any */
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/* actual or intended publication of such source code. */
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#ident "@(#)sccs:lib/mpwlib/setsig.c 6.6"
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# include "signal.h"
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# include "sys/types.h"
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# include "macros.h"
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#define ONSIG 16
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/*
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General-purpose signal setting routine.
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All non-ignored, non-caught signals are caught.
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If a signal other than hangup, interrupt, or quit is caught,
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a "user-oriented" message is printed on file descriptor 2 with
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a number for help(I).
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If hangup, interrupt or quit is caught, that signal
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is set to ignore.
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Termination is like that of "fatal",
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via "clean_up(sig)" (sig is the signal number)
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and "exit(userexit(1))".
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If the file "dump.core" exists in the current directory
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the function commits
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suicide to produce a core dump
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(after calling clean_up, but before calling userexit).
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*/
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static char *Mesg[ONSIG]={
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0,
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0, /* Hangup */
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0, /* Interrupt */
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0, /* Quit */
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"Illegal instruction",
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"Trace/BPT trap",
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"IOT trap",
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"EMT trap",
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"Floating exception",
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"Killed",
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"Bus error",
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"Memory fault",
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"Bad system call",
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"Broken pipe",
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"Alarm clock"
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};
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static void setsig1();
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void
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setsig()
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{
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register int j;
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register void (*n)();
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for (j=1; j<ONSIG; j++)
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if (n=signal(j,setsig1))
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signal(j,n);
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}
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static char preface[]="SIGNAL: ";
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static char endmsg[]=" (ut12)\n";
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static void
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setsig1(sig)
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int sig;
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{
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int userexit(), open(), write();
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unsigned int strlen();
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void abort(), clean_up(), exit();
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if (Mesg[sig]) {
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(void) write(2,preface,length(preface));
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(void) write(2,Mesg[sig],length(Mesg[sig]));
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(void) write(2,endmsg,length(endmsg));
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}
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else
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signal(sig,SIG_IGN);
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clean_up(sig);
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if(open("dump.core",0) > 0) {
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signal(SIGIOT,0);
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abort();
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}
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exit(userexit(1));
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}
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