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Diffstat (limited to 'winsup/testsuite/libltp/lib/tst_sig.c')
| -rw-r--r-- | winsup/testsuite/libltp/lib/tst_sig.c | 213 |
1 files changed, 213 insertions, 0 deletions
diff --git a/winsup/testsuite/libltp/lib/tst_sig.c b/winsup/testsuite/libltp/lib/tst_sig.c new file mode 100644 index 000000000..c0d5bbf46 --- /dev/null +++ b/winsup/testsuite/libltp/lib/tst_sig.c @@ -0,0 +1,213 @@ +/* + * 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 */ + + 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(); +} |