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/*
* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it would be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*/
/* $Id$ */
/*****************************************************************************
OS Testing - Silicon Graphics, Inc.
FUNCTION IDENTIFIER : tst_sig Set up for unexpected signals.
AUTHOR : David D. Fenner
CO-PILOT : Bill Roske
DATE STARTED : 06/06/90
This module may be linked with c-modules requiring unexpected
signal handling. The parameters to tst_sig are as follows:
fork_flag - set to FORK or NOFORK depending upon whether the
calling program executes a fork() system call. It
is normally the case that the calling program treats
SIGCLD as an expected signal if fork() is being used.
handler - a pointer to the unexpected signal handler to
be executed after an unexpected signal has been
detected. If handler is set to DEF_HANDLER, a
default handler is used. This routine should be
declared as function returning an int.
cleanup - a pointer to a cleanup routine to be executed
by the unexpected signal handler before tst_exit is
called. This parameter is set to NULL if no cleanup
routine is required. An external variable, T_cleanup
is set so that other user-defined handlers have
access to the cleanup routine. This routine should be
declared as returning type void.
***************************************************************************/
#ifndef CRAY
#define _BSD_SIGNALS 1 /* Specify that we are using BSD signal interface */
#endif
#include <errno.h>
#include <string.h>
#include <signal.h>
#include "test.h"
#define MAXMESG 150 /* size of mesg string sent to tst_res */
void (*T_cleanup)(); /* pointer to cleanup function */
extern int errno;
static void def_handler(); /* default signal handler */
/****************************************************************************
* tst_sig() : set-up to catch unexpected signals. fork_flag is set to NOFORK
* if SIGCLD is to be an "unexpected signal", otherwise it is set to
* FORK. cleanup points to a cleanup routine to be executed before
* tst_exit is called (cleanup is set to NULL if no cleanup is desired).
* handler is a pointer to the signal handling routine (if handler is
* set to NULL, a default handler is used).
***************************************************************************/
void
tst_sig(int fork_flag, void (*handler)(), void (*cleanup)())
{
char mesg[MAXMESG]; /* message buffer for tst_res */
int sig;
/*
* save T_cleanup and handler function pointers
*/
T_cleanup = cleanup; /* used by default handler */
if (handler == DEF_HANDLER) {
/* use default handler */
handler = def_handler;
}
/*
* now loop through all signals and set the handlers
*/
for (sig = 1; sig < NSIG; sig++) {
/*
* SIGKILL is never unexpected.
* SIGCLD is only unexpected when
* no forking is being done.
* SIGINFO is used for file quotas and should be expected
*/
switch (sig) {
case SIGKILL:
case SIGSTOP:
case SIGCONT:
#ifdef CRAY
case SIGINFO:
case SIGRECOVERY: /* allow chkpnt/restart */
#endif /* CRAY */
#ifdef SIGSWAP
case SIGSWAP:
#endif /* SIGSWAP */
#ifdef SIGCKPT
case SIGCKPT:
#endif
#ifdef SIGRESTART
case SIGRESTART:
#endif
/*
* pthread-private signals SIGPTINTR and SIGPTRESCHED.
* Setting a handler for these signals is disallowed when
* the binary is linked against libpthread.
*/
#ifdef SIGPTINTR
case SIGPTINTR:
#endif /* SIGPTINTR */
#ifdef SIGPTRESCHED
case SIGPTRESCHED:
#endif /* SIGPTRESCHED */
#ifdef __CYGWIN__
case SIGILL:
case SIGTRAP:
case SIGABRT:
case SIGEMT:
case SIGFPE:
case SIGBUS:
#endif
break;
case SIGCLD:
if ( fork_flag == FORK )
continue;
default:
if (signal(sig, handler) == SIG_ERR) {
(void) sprintf(mesg,
"signal() failed for signal %d. error:%d %s.",
sig, errno, strerror(errno));
tst_resm(TWARN, mesg);
}
break;
}
#ifdef __sgi
/* On irix (07/96), signal() fails when signo is 33 or higher */
if ( sig+1 >= 33 )
break;
#endif /* __sgi */
} /* endfor */
}
/****************************************************************************
* def_handler() : default signal handler that is invoked when
* an unexpected signal is caught.
***************************************************************************/
static void
def_handler(int sig)
{
char mesg[MAXMESG]; /* holds tst_res message */
/* first reset trap for this signal (except SIGCLD - its weird) */
if ((sig != SIGCLD) && (sig != SIGSTOP) && (sig != SIGCONT)) {
if (signal(sig, def_handler) == SIG_ERR) {
(void) sprintf(mesg,
"def_handler: signal() failed for signal %d. error:%d %s.",
sig, errno, strerror(errno));
tst_resm(TWARN, mesg);
}
}
(void) sprintf(mesg, "Unexpected signal %d received.", sig);
/*
* Break remaining test cases, do any cleanup, then exit
*/
tst_brkm(TBROK, 0, mesg);
/* now cleanup and exit */
if (T_cleanup) {
(*T_cleanup)();
}
tst_exit();
}
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