test/ipc/semget/semget02.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  *      semget02.c
  23  *
  24  * DESCRIPTION
  25  *      semget02 - test for EACCES and EEXIST errors
  26  *
  27  * ALGORITHM
  28  *      create a semaphore set without read or alter permissions
  29  *      loop if that option was specified
  30  *      call semget() using two different invalid cases
  31  *      check the errno value
  32  *        issue a PASS message if we get EACCES or EEXIST
  33  *      otherwise, the tests fails
  34  *        issue a FAIL message
  35  *      call cleanup
  36  *
  37  * USAGE:  <for command-line>
  38  *  semget02 [-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 #include <pwd.h>
  53
  54 #include "../lib/ipcsem.h"
  55
  56 char *TCID = "semget02";
  57 int TST_TOTAL = 2;
  58 extern int Tst_count;
  59
  60 int exp_enos[] = {EACCES, EEXIST, 0};
  61
  62 char nobody_uid[] = "nobody";
  63 struct passwd *ltpuser;
  64
  65
  66 int sem_id_1 = -1;
  67
  68 struct test_case_t {
  69         int flags;
  70         int error;
  71 } TC [] = {
  72         /* EACCES - the semaphore has no read or alter permissions */
  73         {SEM_RA, EACCES},
  74
  75         /* EEXIST - the semaphore id exists and semget() was called with  */
  76         /* IPC_CREAT and IPC_EXCL                                         */
  77         {IPC_CREAT | IPC_EXCL, EEXIST}
  78 };
  79
  80 int main(int ac, char **av)
  81 {
  82         int lc;                         /* loop counter */
  83         char *msg;                      /* message returned from parse_opts */
  84         int i;
  85
  86         /* parse standard options */
  87         if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
  88                 tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
  89         }
  90
  91         setup();                        /* global setup */
  92
  93         /* The following loop checks looping state if -i option given */
  94
  95         for (lc = 0; TEST_LOOPING(lc); lc++) {
  96                 /* reset Tst_count in case we are looping */
  97                 Tst_count = 0;
  98
  99                 for (i=0; i<TST_TOTAL; i++) {
 100                         /* use the TEST macro to make the call */
 101
 102                         TEST(semget(semkey, PSEMS, TC[i].flags));
 103
 104                         if (TEST_RETURN != -1) {
 105                                 sem_id_1 = TEST_RETURN;
 106                                 tst_resm(TFAIL, "call succeeded");
 107                                 continue;
 108                         }
 109
 110                         TEST_ERROR_LOG(TEST_ERRNO);
 111
 112                         if (TEST_ERRNO == TC[i].error) {
 113                                 tst_resm(TPASS, "expected failure - errno "
 114                                          "= %d : %s", TEST_ERRNO,
 115                                          strerror(TEST_ERRNO));
 116                         } else {
 117                                 tst_resm(TFAIL, "unexpected error - %d : %s",
 118                                          TEST_ERRNO, strerror(TEST_ERRNO));
 119                         }
 120                 }
 121         }
 122
 123         cleanup();
 124
 125         /*NOTREACHED*/
 126         return(0);
 127 }
 128
 129 /*
 130  * setup() - performs all the ONE TIME setup for this test.
 131  */
 132 void
 133 setup(void)
 134 {
 135         /* Switch to nobody user for correct error code collection */
 136         if (geteuid() != 0) {
 137                 tst_brkm(TBROK, tst_exit, "Test must be run as root");
 138         }
 139
 140         /* capture signals */
 141         tst_sig(NOFORK, DEF_HANDLER, cleanup);
 142
 143         /* Set up the expected error numbers for -e option */
 144         TEST_EXP_ENOS(exp_enos);
 145
 146         /* Pause if that option was specified */
 147         TEST_PAUSE;
 148
 149         /*
 150          * Create a temporary directory and cd into it.
 151          * This helps to ensure that a unique msgkey is created.
 152          * See ../lib/libipc.c for more information.
 153          */
 154         tst_tmpdir();
 155
 156          ltpuser = getpwnam(nobody_uid);
 157          if (seteuid(ltpuser->pw_uid) == -1) {
 158                 tst_resm(TINFO, "setreuid failed to "
 159                          "to set the effective uid to %d",
 160                          ltpuser->pw_uid);
 161                 perror("setreuid");
 162          }
 163
 164
 165         /* get an IPC resource key */
 166         semkey = getipckey();
 167
 168         /* create a semaphore set without read or alter permissions */
 169         if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
 170                 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
 171         }
 172 }
 173
 174 /*
 175  * cleanup() - performs all the ONE TIME cleanup for this test at completion
 176  *             or premature exit.
 177  */
 178 void
 179 cleanup(void)
 180 {
 181         /* if it exists, remove the semaphore resource */
 182         rm_sema(sem_id_1);
 183
 184         /* Remove the temporary directory */
 185         seteuid(getuid());
 186         tst_rmdir();
 187
 188         /*
 189          * print timing stats if that option was specified.
 190          * print errno log if that option was specified.
 191          */
 192         TEST_CLEANUP;
 193
 194         /* exit with return code appropriate for results */
 195         tst_exit();
 196 }
 197