text: /*
   *
   *   Copyright (c) International Business Machines  Corp., 2001
   *
   *   This program is free software;  you can redistribute it and/or modify
   *   it under the terms of the GNU General Public License as published by
   *   the Free Software Foundation; either version 2 of the License, or
   *   (at your option) any later version.
   *
   *   This program is distributed in the hope that it will be useful,
   *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
   *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
   *   the GNU General Public License for more details.
   *
   *   You should have received a copy of the GNU General Public License
   *   along with this program;  if not, write to the Free Software
   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
   */
  
  /*
   * NAME
   *	msgsnd06.c
   *
   * DESCRIPTION
   *	msgsnd06 - test for EIDRM error
   *
   * ALGORITHM
   *	loop if that option was specified
   *	create a message queue with read/write permissions
   *	initialize a message buffer with a known message and type
   *	enqueue messages in a loop until the queue is full
   *	fork a child process
   *	child attempts to enqueue a message to the full queue and sleeps	
   *	parent removes the queue and then exits
   *	child get a return from msgsnd()
   *	check the errno value
   *	  issue a PASS message if we get EIDRM
   *	otherwise, the tests fails
   *	  issue a FAIL message
   *	call cleanup
   *
   * USAGE:  <for command-line>
   *  msgsnd06 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
   *     where,  -c n : Run n copies concurrently.
   *             -e   : Turn on errno logging.
   *	       -i n : Execute test n times.
   *	       -I x : Execute test for x seconds.
   *	       -P x : Pause for x seconds between iterations.
   *	       -t   : Turn on syscall timing.
   *
   * HISTORY
   *	03/2001 - Written by Wayne Boyer
   *
   * RESTRICTIONS
   *	none
   */
  
  #include <sys/wait.h> 
  #include "test.h"
  #include "usctest.h"
  
  #include "ipcmsg.h"
  
  void cleanup(void);
  void setup(void);
  void do_child(void);
  
  char *TCID = "msgsnd06";
  int TST_TOTAL = 1;
  extern int Tst_count;
  
  int exp_enos[] = { EIDRM, 0 };	/* 0 terminated list of expected errnos */
  
  int msg_q_1 = -1;		/* The message queue id created in setup */
  MSGBUF msg_buf;
  
  int main(int ac, char **av)
  {
      int lc;			/* loop counter */
      char *msg;			/* message returned from parse_opts */
      pid_t c_pid;
      int status, e_code;
  
      /* parse standard options */
      if ((msg =
  	 parse_opts(ac, av, (option_t *) NULL, NULL)) != (char *) NULL) {
  	tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
      }
  
  #ifdef UCLINUX
      maybe_run_child(&do_child, "d", &msg_q_1);
  #endif
  
      setup();			/* global setup */
  
      /* The following loop checks looping state if -i option given */
  
      for (lc = 0; TEST_LOOPING(lc); lc++) {
  	/* reset Tst_count in case we are looping */
  	Tst_count = 0;
  
  	msgkey = getipckey();
  
  	/* create a message queue with read/write permission */
  	if ((msg_q_1 = msgget(msgkey, IPC_CREAT | IPC_EXCL | MSG_RW))
  	    == -1) {
  	    tst_brkm(TBROK, cleanup, "Can't create message queue");
  	}
  
  	/* initialize the message buffer */
  	init_buf(&msg_buf, MSGTYPE, MSGSIZE);
  
  	/* write messages to the queue until it is full */
  	while (msgsnd(msg_q_1, &msg_buf, MSGSIZE, IPC_NOWAIT) != -1) {
  	    msg_buf.mtype += 1;
  	}
  
  	/*
  	 * fork a child that will attempt to write a message
  	 * to the queue without IPC_NOWAIT
  	 */
  	if ((c_pid = FORK_OR_VFORK()) == -1) {
  	    tst_brkm(TBROK, cleanup, "could not fork");
  	}
  
  	if (c_pid == 0) {	/* child */
  #ifdef UCLINUX
  	    if (self_exec(av[0], "d", msg_q_1) < 0) {
  		tst_brkm(TBROK, cleanup, "could not self_exec");
  	    }
  #else
  	    do_child();
  #endif
  	} else {		/* parent */
  	    sleep(1);
  	    /* remove the queue */
  	    rm_queue(msg_q_1);
  
  	    /* wait for the child to finish */
  	    wait(&status);
  	    /* make sure the child returned a good exit status */
  	    e_code = status >> 8;
  	    if (e_code != 0) {
  		tst_resm(TFAIL, "Failures reported above");
  	    }
  	}
      }
  
      cleanup();
  
   /*NOTREACHED*/
   return(0);
  }
  
  /*
   * do_child()
   */
  void
  do_child()
  {
      int retval = 0;
  
  #ifdef UCLINUX
      /* initialize the message buffer */
      init_buf(&msg_buf, MSGTYPE, MSGSIZE);
  #endif
  
      /*
       * Attempt to write another message to the full queue.
       * Without the IPC_NOWAIT flag, the child sleeps
       */
      TEST(msgsnd(msg_q_1, &msg_buf, MSGSIZE, 0));
  
      if (TEST_RETURN != -1) {
  	retval = 1;
  	tst_resm(TFAIL, "call succeeded when error expected");
  	exit(retval);
      }
  
      TEST_ERROR_LOG(TEST_ERRNO);
  
      switch (TEST_ERRNO) {
      case EIDRM:
  	tst_resm(TPASS, "expected failure - errno = %d : %s",
  		 TEST_ERRNO, strerror(TEST_ERRNO));
  
  	/* mark the queue as invalid as it was removed */
  	msg_q_1 = -1;
  	break;
      default:
  	retval = 1;
  	tst_resm(TFAIL, "call failed with an unexpected error - %d : %s",
  		 TEST_ERRNO, strerror(TEST_ERRNO));
  	break;
      }
      exit(retval);
  }
  
  /*
   * setup() - performs all the ONE TIME setup for this test.
   */
  void setup(void)
  {
      /* capture signals */
      tst_sig(FORK, DEF_HANDLER, cleanup);
  
      /* Set up the expected error numbers for -e option */
      TEST_EXP_ENOS(exp_enos);
  
      /* Pause if that option was specified */
      TEST_PAUSE;
  
      /*
       * Create a temporary directory and cd into it.
       * This helps to ensure that a unique msgkey is created.
       * See ../lib/libipc.c for more information.
       */
      tst_tmpdir();
  }
  
  /*
   * cleanup() - performs all the ONE TIME cleanup for this test at completion
   * 	       or premature exit.
   */
  void cleanup(void)
  {
  
      /* Remove the temporary directory */
      tst_rmdir();
  
      /*
       * print timing stats if that option was specified.
       * print errno log if that option was specified.
       */
      TEST_CLEANUP;
  
      /* exit with return code appropriate for results */
      tst_exit();
  }
  