test/ipc/semop/semop04.c

   1 /*
   2  *
   3  *   Copyright (c) International Business Machines  Corp., 2001
   4  *
   5  *   This program is free software;  you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation; either version 2 of the License, or
   8  *   (at your option) any later version.
   9  *
  10  *   This program is distributed in the hope that it will be useful,
  11  *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  13  *   the GNU General Public License for more details.
  14  *
  15  *   You should have received a copy of the GNU General Public License
  16  *   along with this program;  if not, write to the Free Software
  17  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  18  */
  19
  20 /*
  21  * NAME
  22  *      semop04.c
  23  *
  24  * DESCRIPTION
  25  *      semop04 - test for EAGAIN error
  26  *
  27  * ALGORITHM
  28  *      create a semaphore set with read and alter permissions
  29  *      loop if that option was specified
  30  *      call semop() with two different invalid cases
  31  *      check the errno value
  32  *        issue a PASS message if we get EAGAIN
  33  *      otherwise, the tests fails
  34  *        issue a FAIL message
  35  *      call cleanup
  36  *
  37  * USAGE:  <for command-line>
  38  *  semop04 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
  39  *     where,  -c n : Run n copies concurrently.
  40  *             -e   : Turn on errno logging.
  41  *             -i n : Execute test n times.
  42  *             -I x : Execute test for x seconds.
  43  *             -P x : Pause for x seconds between iterations.
  44  *             -t   : Turn on syscall timing.
  45  *
  46  * HISTORY
  47  *      03/2001 - Written by Wayne Boyer
  48  *
  49  * RESTRICTIONS
  50  *      none
  51  */
  52
  53 #include "ipcsem.h"
  54
  55 char *TCID = "semop04";
  56 int TST_TOTAL = 2;
  57 extern int Tst_count;
  58
  59 int exp_enos[] = {EAGAIN, 0};   /* 0 terminated list of expected errnos */
  60
  61 int sem_id_1 = -1;
  62
  63 struct sembuf s_buf;
  64
  65 struct test_case_t {
  66         union semun get_arr;
  67         short op;
  68         short flg;
  69         short num;
  70         int error;
  71 } TC[] = {
  72         /* EAGAIN sem_op = 0 */
  73         {{1}, 0, IPC_NOWAIT, 2, EAGAIN},
  74
  75         /* EAGAIN sem_op = -1 */
  76         {{0}, -1, IPC_NOWAIT, 2, EAGAIN}
  77 };
  78
  79 int main(int ac, char **av)
  80 {
  81         int lc;                         /* loop counter */
  82         char *msg;                      /* message returned from parse_opts */
  83         int val = 1;                    /* value for SETVAL */
  84
  85         int i;
  86
  87         /* parse standard options */
  88         if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
  89                 tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
  90         }
  91
  92         setup();                        /* global setup */
  93
  94         /* The following loop checks looping state if -i option given */
  95
  96         for (lc = 0; TEST_LOOPING(lc); lc++) {
  97                 /* reset Tst_count in case we are looping */
  98                 Tst_count = 0;
  99
 100                 for (i=0; i<TST_TOTAL; i++) {
 101
 102                         /* initialize the s_buf buffer */
 103                         s_buf.sem_op = TC[i].op;
 104                         s_buf.sem_flg = TC[i].flg;
 105                         s_buf.sem_num = TC[i].num;
 106
 107                         /* initialize all the primitive semaphores */
 108                         TC[i].get_arr.val = val--;
 109                         if (semctl(sem_id_1, TC[i].num, SETVAL, TC[i].get_arr)
 110                             == -1) {
 111                                 tst_brkm(TBROK, cleanup, "semctl() failed");
 112                         }
 113
 114                         /*
 115                          * make the call with the TEST macro
 116                          */
 117
 118                         TEST(semop(sem_id_1, &s_buf, 1));
 119
 120                         if (TEST_RETURN != -1) {
 121                                 tst_resm(TFAIL, "call succeeded unexpectedly");
 122                                 continue;
 123                         }
 124
 125                         TEST_ERROR_LOG(TEST_ERRNO);
 126
 127                         if (TEST_ERRNO == TC[i].error) {
 128                                 tst_resm(TPASS, "expected failure - errno = %d"                                          " : %s", TEST_ERRNO,
 129                                          strerror(TEST_ERRNO));
 130                         } else {
 131                                 tst_resm(TFAIL, "unexpected error - "
 132                                          "%d : %s", TEST_ERRNO,
 133                                          strerror(TEST_ERRNO));
 134                         }
 135                 }
 136         }
 137
 138         cleanup();
 139
 140         /*NOTREACHED*/
 141         return(0);
 142 }
 143
 144 /*
 145  * setup() - performs all the ONE TIME setup for this test.
 146  */
 147 void
 148 setup(void)
 149 {
 150         /* capture signals */
 151         tst_sig(NOFORK, DEF_HANDLER, cleanup);
 152
 153         /* Set up the expected error numbers for -e option */
 154         TEST_EXP_ENOS(exp_enos);
 155
 156         /* Pause if that option was specified */
 157         TEST_PAUSE;
 158
 159         /*
 160          * Create a temporary directory and cd into it.
 161          * This helps to ensure that a unique msgkey is created.
 162          * See ../lib/libipc.c for more information.
 163          */
 164         tst_tmpdir();
 165
 166         /* get an IPC resource key */
 167         semkey = getipckey();
 168
 169         /* create a semaphore set with read and alter permissions */
 170         /* and PSEMS "primitive" semaphores                       */
 171         if ((sem_id_1 =
 172              semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL | SEM_RA)) == -1) {
 173                 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
 174         }
 175 }
 176
 177 /*
 178  * cleanup() - performs all the ONE TIME cleanup for this test at completion
 179  *             or premature exit.
 180  */
 181 void
 182 cleanup(void)
 183 {
 184         /* if it exists, remove the semaphore resource */
 185         rm_sema(sem_id_1);
 186
 187         /* Remove the temporary directory */
 188         tst_rmdir();
 189
 190         /*
 191          * print timing stats if that option was specified.
 192          * print errno log if that option was specified.
 193          */
 194         TEST_CLEANUP;
 195
 196         /* exit with return code appropriate for results */
 197         tst_exit();
 198 }
 199