/* * 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 #include #include #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(); }