signal03.c

cygwin, 著名的在win32下模拟unix操作系统的东东

/*
 * 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: signal03.c,v 1.1 2001/09/09 13:38:17 duda Exp $ */
/***********************************************************************************
 * 
 * OS Test   -  Silicon Graphics, Inc.  Eagan, Minnesota
 * 
 * TEST IDENTIFIER :  signal03  Boundary value and other invalid value checking
 * 				 of signal setup and signal sending.
 * 
 * PARENT DOCUMENT :  sgntds01  Signal System Call
 * 		
 * AUTHOR           :  Dave Baumgartner
 * 		    :  Rewrote 12/92 by Richard Logan
 * 
 * CO-PILOT         :  Barrie Kletscher
 * 
 * DATE STARTED     :  10/17/85
 * 
 * TEST ITEMS
 * 
 * 	1. SIGKILL can not be set to be caught, errno:EINVAL (POSIX).
 * 	2. SIGKILL can not be caught.
 * 	3. SIGKILL can not be set to be ignored, errno:EINVAL (POSIX).
 * 	4. SIGKILL can not be ignored.
 * 	5. SIGKILL can not be reset to default, errno:EINVAL (POSIX.
 * 
 * ENVIRONMENTAL NEEDS
 * 
 * 	NONE
 * 
 * SPECIAL PROCEDURAL REQUIREMENTS
 * 
 * 	None
 * 
 * INTERCASE DEPENDENCIES
 * 
 * 	2 depends on 1 and 4 on 3.
 * 
 * DETAILED DESCRIPTION
 * 
 * 	main()
 * 	Call catch_test to test setup and catching of SIGKILL.
 * 
 * 
 * 	Call ignore_test to test setup and ignoring of SIGKILL.
 * 
 * 
 * 	Call sigdfl_test to test setting SIGKILL to default.
 * 
 * 	* END OF MAIN *
 * 
 * 
 * 	catch_test()
 * 
 * 	fork a child
 * 	if this is the parent
 * 		sleep to let child start.
 * 		send sig to child.
 * 		wait for the child to terminate.
 * 
 * 		if the termination status of the child equals the signal sent to it
 * 			Test item 1 PASSED the child was killed.
 * 		else if status equals the exit value of SIG_CAUGHT
 * 			Test item 2 FAILED sig was caught.
 * 		else 
 * 			Test item 2 FAILED because the child was not killed
 * 			but sig was not caught either.
 * 
 * 	else this the child
 * 		set exit_val to SIG_NOT_CAUGHT.
 * 		set to catch sig, where the interrupt routine just sets 
 * 		exit_val to SIG_CAUGHT.
 * 
 * 		If the return value and errno, after trying to set to catch sig,
 * 		do not indicate that an error has occurred.
 * 			Test item 1 FAILED bad return, return value:X, errno:X.
 * 		else
 * 			Test item 1 PASSED sig was not set to be caught.
 * 
 * 		pause until the parent sends a signal.
 * 		The child should be killed by the signal but if not exit
 * 		with exit_val.
 * 
 * 	* End of catch_test. *
 * 
 * 
 * 	ignore_test()
 * 
 * 	fork a child
 * 	if this is the parent
 * 		sleep to let child start.
 * 		send SIGKILL to child.
 * 		wait for the child to terminate.
 * 
 * 		if the termination status of the child equals SIGKILL
 * 			Test item 4 PASSED the child was killed.
 * 		else if the status equals the exit value of SIG_IGNORED
 * 			Test item 4 FAILED SIGKILL was ignored.
 * 
 * 	else this the child
 * 
 * 		If the return value and errno, after trying to set to ignore SIGKILL,
 * 		do not indicate that an error has occurred.
 * 			Test item 3 FAILED bad return, return value:X, errno:X.
 * 		else
 * 			Test item 3 PASSED SIGKILL was not set to be ignored.
 * 
 * 		pause until the parent sends SIGKILL.
 * 		The child should be killed by the signal but if not exit
 * 		with SIG_IGNORED.
 * 
 * 	* End of ignore_test. *
 * 
 * 
 * 	sigdfl_test()
 * 
 * 	If the return value and errno, after trying to set to SIGKILL to default,
 * 	do not indicate that an error has occurred.
 * 		Test item 5 FAILED bad return, return value:X, errno:X.
 * 	else
 * 		Test item 5 PASSED SIGKILL was not set to default.
 * 
 * 	* End of sigdfl_test. *
 * 
 * BUGS/NOTES
 * 	Since the system call under test is executed in the child, no
 *	timings on this system call will be reported.
 * 
***********************************************************************************/

#include <signal.h>
#include <errno.h>  
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/wait.h>

#include "test.h"
#include "usctest.h"

void setup();
void cleanup();
void do_test();
void sigdfl_test();
void update_timings();

#if defined(linux)
# define SIG_PF sig_t  /* This might need to be sighandler_t on some systems */
#elif defined(__CYGWIN__)
typedef void (*sighandler_t) (int);
#define SIG_PF sighandler_t
#endif

#define SIG_CAUGHT	1
#define SIG_NOT_CAUGHT	0
#define SIG_IGNORED	5
#define TIMED_OUT	99

#define TIMEOUT		20

#define GO_FLAG		1
#define ERROR_FLAG	2
#define PASS_FLAG	3
#define FAIL_FLAG	4

#define IGNORE_TEST	1
#define CATCH_TEST	2

#define MAXMESG 150	/* The Maximum message that can be created.	*/

int exit_val;		/* Global variable, used to tell whether the	*/
			/* child exited instead of being killed.	*/
extern int errno;	/* errno holds the error value returned by	*/
			/* a system call.                        	*/
char mesg[MAXMESG];	/* Holds messages to pass to tst_res.		*/ 

struct ipc_t {
    int status;
    char mesg[MAXMESG];
    struct tblock timings;
} Ipc_info;

char *TCID = "signal03";
int TST_TOTAL = 5;
extern int Tst_count;           /* count of test items completed */

int Pid;		/* Return value from fork.			 */

long Tret;

/***********************************************************************
 *   M A I N
 ***********************************************************************/
int
main(argc, argv)
int argc;
char **argv;
{
    int lc;
    const char *msg;

    /***************************************************************
    * parse standard options
    ***************************************************************/
    if ( (msg=parse_opts(argc, argv, (option_t *) NULL, NULL)) != (char *) NULL ) {
        tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
	tst_exit();
    }

    /***************************************************************
     * perform global setup for test
     ***************************************************************/
    setup();

    /***************************************************************
     * check looping state if -c option given
     ***************************************************************/
    for (lc=0; TEST_LOOPING(lc); lc++) {

        /* reset Tst_count in case we are looping. */
        Tst_count=0;

	errno=-4;

	/*
	 * Call catch_test to test setup and catching of SIGKILL.
	 */
	(void) do_test(CATCH_TEST, Tst_count);

	/*
	 * Call ignore_test to test setup and ignoring of SIGKILL.
	 */
	(void) do_test(IGNORE_TEST, Tst_count);

	/*
	 * Call sigdfl_test to test setting SIGKILL to default.
	 */
	(void) sigdfl_test();

    }

    cleanup();

    return 0;
} /*End of main*/

/***********************************************************************
 *
 ***********************************************************************/
void
do_test(test_case, tst_count)
int test_case;
int tst_count;
{
  int term_stat;	/* Termination status of the child returned to	 */
			/* the parent.					 */
  char string[30];
  int fd1[2];		/* ipc */
  int rd_sz;		/* size of read */
  void p_timeout_handler();
  void c_timeout_handler();
  void catchsig();

  Tst_count = tst_count;

  /*
   * Create a pipe of ipc
   */
  if ( pipe(fd1) == -1 ) {
	 sprintf(mesg,
	 "pipe system call failed, Errno: %d, Error message: %s",
			errno,strerror(errno)); 
	 tst_resm(TBROK,mesg);
	 tst_resm(TBROK,mesg);
	 return;
  }

  /*
   * Cause the read to return 0 once EOF is encountered and the
   * read to return -1 if pipe is empty.
   */

  if ( fcntl(fd1[0], F_SETFL, O_NONBLOCK) == -1 ) {
	sprintf(mesg, "fcntl(fd1[0], F_SETFL, O_NONBLOCK) failed: errno=%d",
	    errno);
	tst_resm(TBROK,mesg);
        tst_resm(TBROK,mesg);
	close(fd1[0]);
	close(fd1[1]);
	return;
  }

  if ((Pid = fork()) > 0) {	/* parent */

	signal(SIGALRM, p_timeout_handler);

	alarm(TIMEOUT);

	close(fd1[1]);      /* close write side */

	/*