test/ipc/semctl/semctl02.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  *      semctl02.c
  23  *
  24  * DESCRIPTION
  25  *      semctl02 - test for EACCES error
  26  *
  27  * ALGORITHM
  28  *      create a semaphore set without read/alter permissions
  29  *      loop if that option was specified
  30  *      call semctl() attempting an IPC_STAT command
  31  *      check the errno value
  32  *        issue a PASS message if we get EACCES
  33  *      otherwise, the tests fails
  34  *        issue a FAIL message
  35  *      call cleanup
  36  *
  37  * USAGE:  <for command-line>
  38  *  semctl02 [-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 #include <pwd.h>
  55
  56 char *TCID = "semctl02";
  57 int TST_TOTAL = 1;
  58 extern int Tst_count;
  59
  60 int exp_enos[] = {EACCES, 0};   /* 0 terminated list of expected errnos */
  61
  62 char nobody_uid[] = "nobody";
  63 struct passwd *ltpuser;
  64
  65 int sem_id_1 = -1;
  66
  67 int main(int ac, char **av)
  68 {
  69         int lc;                         /* loop counter */
  70         char *msg;                      /* message returned from parse_opts */
  71
  72         struct semid_ds sem_ds;
  73         union semun un_arg;
  74
  75         /* parse standard options */
  76         if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
  77                 tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
  78         }
  79
  80         setup();                        /* global setup */
  81
  82         /* The following loop checks looping state if -i option given */
  83
  84         for (lc = 0; TEST_LOOPING(lc); lc++) {
  85                 /* reset Tst_count in case we are looping */
  86                 Tst_count = 0;
  87
  88                 un_arg.buf = &sem_ds;
  89
  90                 /*
  91                  * use the TEST macro to make the call
  92                  */
  93
  94                 TEST(semctl(sem_id_1, 0, IPC_STAT, un_arg));
  95
  96                 if (TEST_RETURN != -1) {
  97                         tst_resm(TFAIL, "call succeeded when error expected");
  98                         continue;
  99                 }
 100
 101                 TEST_ERROR_LOG(TEST_ERRNO);
 102
 103                 switch(TEST_ERRNO) {
 104                 case EACCES:
 105                         tst_resm(TPASS, "expected failure - errno = %d : %s",
 106                                  TEST_ERRNO, strerror(TEST_ERRNO));
 107                         break;
 108                 default:
 109                         tst_resm(TFAIL, "unexpected error - %d : %s",
 110                                  TEST_ERRNO, strerror(TEST_ERRNO));
 111                         break;
 112                 }
 113         }
 114
 115         cleanup();
 116
 117         /*NOTREACHED*/
 118         return(0);
 119 }
 120
 121 /*
 122  * setup() - performs all the ONE TIME setup for this test.
 123  */
 124 void
 125 setup(void)
 126 {
 127         /* capture signals */
 128         tst_sig(NOFORK, DEF_HANDLER, cleanup);
 129
 130         /* Set up the expected error numbers for -e option */
 131         TEST_EXP_ENOS(exp_enos);
 132
 133         /* Pause if that option was specified */
 134         TEST_PAUSE;
 135
 136          /* Switch to nobody user for correct error code collection */
 137         if (geteuid() != 0) {
 138                 tst_brkm(TBROK, tst_exit, "Test must be run as root");
 139         }
 140         /*
 141          * Create a temporary directory and cd into it.
 142          * This helps to ensure that a unique msgkey is created.
 143          * See ../lib/libipc.c for more information.
 144          */
 145         tst_tmpdir();
 146
 147         ltpuser = getpwnam(nobody_uid);
 148         if (seteuid(ltpuser->pw_uid) == -1) {
 149                 tst_resm(TINFO, "setuid failed to "
 150                          "to set the effective uid to %d",
 151                          ltpuser->pw_uid);
 152                 perror("setuid");
 153         }
 154
 155
 156         /* get an IPC resource key */
 157         semkey = getipckey();
 158
 159         /* create a semaphore set without read or alter permissions */
 160         if ((sem_id_1 = semget(semkey, PSEMS, IPC_CREAT | IPC_EXCL)) == -1) {
 161                 tst_brkm(TBROK, cleanup, "couldn't create semaphore in setup");
 162         }
 163 }
 164
 165 /*
 166  * cleanup() - performs all the ONE TIME cleanup for this test at completion
 167  *             or premature exit.
 168  */
 169 void
 170 cleanup(void)
 171 {
 172         if (seteuid(0) == -1) {
 173                 tst_resm(TINFO, "setuid back to root error!\n");
 174         }
 175
 176         /* if it exists, remove the semaphore resouce */
 177         rm_sema(sem_id_1);
 178
 179         /* Remove the temporary directory */
 180         tst_rmdir();
 181
 182         /*
 183          * print timing stats if that option was specified.
 184          * print errno log if that option was specified.
 185          */
 186         TEST_CLEANUP;
 187
 188         /* exit with return code appropriate for results */
 189         tst_exit();
 190 }
 191