500 lines
11 KiB
C
500 lines
11 KiB
C
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/*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* NAME
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* shmctl01.c
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*
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* DESCRIPTION
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* shmctl01 - test the IPC_STAT, IPC_SET and IPC_RMID commands as
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* they are used with shmctl()
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*
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* ALGORITHM
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* loop if that option was specified
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* create a shared memory segment with read and write permission
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* set up any test case specific conditions
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* call shmctl() using the TEST macro
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* check the return code
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* if failure, issue a FAIL message.
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* otherwise,
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* if doing functionality testing
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* call the correct test function
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* if the conditions are correct,
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* issue a PASS message
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* otherwise
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* issue a FAIL message
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* otherwise
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* issue a PASS message
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* call cleanup
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include "ipcshm.h"
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#include "safe_macros.h"
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char *TCID = "shmctl01";
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static int shm_id_1 = -1;
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static int shm_index;
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static struct shmid_ds buf;
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static struct shminfo info;
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static long save_time;
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#define FIRST 0
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#define SECOND 1
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static int stat_time;
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static void *set_shared;
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#define N_ATTACH 4
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static pid_t pid_arr[N_ATTACH];
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/* Setup, cleanup and check routines for IPC_STAT */
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static void stat_setup(void), func_istat(int ret);
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static void stat_cleanup(void);
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/* Setup and check routines for IPC_SET */
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static void set_setup(void), func_set(int ret);
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/* Check routine for IPC_INFO */
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static void func_info(int ret);
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/* Check routine for SHM_STAT */
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static void func_sstat(int ret);
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static void func_sstat_setup(void);
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/* Check routine for SHM_LOCK */
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static void func_lock(int ret);
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/* Check routine for SHM_UNLOCK */
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static void func_unlock(int ret);
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/* Check routine for IPC_RMID */
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static void func_rmid(int ret);
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/* Child function */
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static void do_child(void);
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static struct test_case_t {
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int *shmid;
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int cmd;
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struct shmid_ds *arg;
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void (*func_test) (int);
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void (*func_setup) (void);
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} TC[] = {
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{&shm_id_1, IPC_STAT, &buf, func_istat, stat_setup},
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#ifndef UCLINUX
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/*
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* The second test is not applicable to uClinux;
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* shared memory segments are detached on exec(),
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* so cannot be passed to uClinux children.
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*/
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{&shm_id_1, IPC_STAT, &buf, func_istat, stat_setup},
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#endif
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{&shm_id_1, IPC_SET, &buf, func_set, set_setup},
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{&shm_id_1, IPC_INFO, (struct shmid_ds *) &info, func_info, NULL},
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{&shm_index, SHM_STAT, &buf, func_sstat, func_sstat_setup},
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{&shm_id_1, SHM_LOCK, NULL, func_lock, NULL},
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{&shm_id_1, SHM_UNLOCK, NULL, func_unlock, NULL},
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{&shm_id_1, IPC_RMID, NULL, func_rmid, NULL},
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};
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static int TST_TOTAL = ARRAY_SIZE(TC);
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#define NEWMODE 0066
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#ifdef UCLINUX
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#define PIPE_NAME "shmctl01"
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static char *argv0;
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#endif
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static int stat_i;
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int main(int argc, char *argv[])
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{
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int lc;
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int i;
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tst_parse_opts(argc, argv, NULL, NULL);
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#ifdef UCLINUX
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argv0 = argv[0];
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maybe_run_child(do_child, "ddd", &stat_i, &stat_time, &shm_id_1);
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#endif
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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stat_time = FIRST;
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/*
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* Create a shared memory segment with read and write
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* permissions. Do this here instead of in setup()
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* so that looping (-i) will work correctly.
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*/
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shm_id_1 = shmget(shmkey, SHM_SIZE,
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IPC_CREAT | IPC_EXCL | SHM_RW);
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if (shm_id_1 == -1)
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tst_brkm(TBROK, cleanup, "couldn't create the shared"
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" memory segment");
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for (i = 0; i < TST_TOTAL; i++) {
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/*
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* if needed, set up any required conditions by
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* calling the appropriate setup function
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*/
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if (TC[i].func_setup != NULL)
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(*TC[i].func_setup) ();
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TEST(shmctl(*(TC[i].shmid), TC[i].cmd, TC[i].arg));
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if (TEST_RETURN == -1) {
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tst_resm(TFAIL, "%s call failed - errno "
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"= %d : %s", TCID, TEST_ERRNO,
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strerror(TEST_ERRNO));
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continue;
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}
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(*TC[i].func_test) (TEST_RETURN);
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}
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}
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cleanup();
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tst_exit();
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}
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/*
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* set_shmat() - Attach the shared memory and return the pointer. Use
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* this seperate routine to avoid code duplication in
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* stat_setup() below.
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*/
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void *set_shmat(void)
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{
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void *rval;
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/* attach the shared memory */
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rval = shmat(shm_id_1, 0, 0);
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/*
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* if shmat() fails, the only thing we can do is
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* print a message to that effect.
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*/
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if (rval == (void *)-1) {
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tst_resm(TBROK, "shmat() failed - %s", strerror(errno));
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cleanup();
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}
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return rval;
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}
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/*
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* stat_setup() - Set up for the IPC_STAT command with shmctl().
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* Make things interesting by forking some children
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* that will either attach or inherit the shared memory.
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*/
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void stat_setup(void)
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{
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void *set_shmat();
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pid_t pid;
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/*
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* The first time through, let the children attach the memory.
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* The second time through, attach the memory first and let
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* the children inherit the memory.
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*/
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if (stat_time == SECOND)
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/*
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* use the global "set_shared" variable here so that
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* it can be removed in the stat_func() routine.
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*/
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set_shared = set_shmat();
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tst_old_flush();
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for (stat_i = 0; stat_i < N_ATTACH; stat_i++) {
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pid = FORK_OR_VFORK();
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if (pid == -1)
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tst_brkm(TBROK, cleanup, "could not fork");
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if (pid == 0) {
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#ifdef UCLINUX
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if (self_exec(argv0, "ddd", stat_i, stat_time,
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shm_id_1) < 0)
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tst_brkm(TBROK, cleanup, "could not self_exec");
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#else
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do_child();
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#endif
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} else {
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/* save the child's pid for cleanup later */
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pid_arr[stat_i] = pid;
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TST_PROCESS_STATE_WAIT(cleanup, pid, 'S');
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}
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}
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}
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void do_child(void)
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{
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void *test;
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if (stat_time == FIRST)
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test = set_shmat();
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else
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test = set_shared;
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memcpy(test, &stat_i, sizeof(stat_i));
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/* pause until we get a signal from stat_cleanup() */
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pause();
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/* now we're back - detach the memory and exit */
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if (shmdt(test) == -1)
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tst_resm(TBROK, "shmdt() failed - %d", errno);
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tst_exit();
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}
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/*
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* func_istat() - check the functionality of the IPC_STAT command with shmctl()
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* by looking at the pid of the creator, the segement size,
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* the number of attaches and the mode.
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*/
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void func_istat(int ret)
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{
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int fail = 0;
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pid_t pid;
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/* check perm, pid, nattach and size */
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pid = getpid();
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if (buf.shm_cpid != pid) {
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tst_resm(TFAIL, "creator pid is incorrect");
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fail = 1;
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}
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if (!fail && buf.shm_segsz != SHM_SIZE) {
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tst_resm(TFAIL, "segment size is incorrect");
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fail = 1;
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}
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/*
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* The first time through, only the children attach the memory, so
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* the attaches equal N_ATTACH + stat_time (0). The second time
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* through, the parent attaches the memory and the children inherit
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* that memory so the attaches equal N_ATTACH + stat_time (1).
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*/
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if (!fail && buf.shm_nattch != N_ATTACH + stat_time) {
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tst_resm(TFAIL, "# of attaches is incorrect - %ld",
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buf.shm_nattch);
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fail = 1;
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}
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/* use MODE_MASK to make sure we are comparing the last 9 bits */
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if (!fail && (buf.shm_perm.mode & MODE_MASK) !=
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((SHM_RW) & MODE_MASK)) {
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tst_resm(TFAIL, "segment mode is incorrect");
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fail = 1;
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}
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stat_cleanup();
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/* save the change time for use in the next test */
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save_time = buf.shm_ctime;
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if (fail)
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return;
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tst_resm(TPASS, "pid, size, # of attaches and mode are correct "
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"- pass #%d", stat_time);
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}
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/*
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* stat_cleanup() - signal the children to clean up after themselves and
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* have the parent make dessert, er, um, make that remove
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* the shared memory that is no longer needed.
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*/
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void stat_cleanup(void)
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{
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int i;
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/* wake up the childern so they can detach the memory and exit */
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for (i = 0; i < N_ATTACH; i++) {
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SAFE_KILL(cleanup, pid_arr[i], SIGUSR1);
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}
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/* remove the parent's shared memory the second time through */
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if (stat_time == SECOND) {
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if (shmdt(set_shared) == -1)
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tst_resm(TINFO, "shmdt() failed");
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}
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for (i = 0; i < N_ATTACH; i++) {
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SAFE_WAITPID(cleanup, pid_arr[i], NULL, 0);
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}
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stat_time++;
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}
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/*
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* set_setup() - set up for the IPC_SET command with shmctl()
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*/
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void set_setup(void)
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{
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/* set up a new mode for the shared memory segment */
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buf.shm_perm.mode = SHM_RW | NEWMODE;
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/* sleep for one second to get a different shm_ctime value */
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sleep(1);
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}
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/*
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* func_set() - check the functionality of the IPC_SET command with shmctl()
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*/
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void func_set(int ret)
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{
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int fail = 0;
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/* first stat the shared memory to get the new data */
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if (shmctl(shm_id_1, IPC_STAT, &buf) == -1) {
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tst_resm(TBROK, "stat failed in func_set()");
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return;
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}
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if ((buf.shm_perm.mode & MODE_MASK) !=
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((SHM_RW | NEWMODE) & MODE_MASK)) {
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tst_resm(TFAIL, "new mode is incorrect");
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fail = 1;
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}
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if (!fail && save_time >= buf.shm_ctime) {
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tst_resm(TFAIL, "change time is incorrect");
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fail = 1;
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}
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||
|
|
if (fail)
|
||
|
|
return;
|
||
|
|
|
||
|
|
tst_resm(TPASS, "new mode and change time are correct");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void func_info(int ret)
|
||
|
|
{
|
||
|
|
if (info.shmmin != 1)
|
||
|
|
tst_resm(TFAIL, "value of shmmin is incorrect");
|
||
|
|
else
|
||
|
|
tst_resm(TPASS, "get correct shared memory limits");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void func_sstat(int ret)
|
||
|
|
{
|
||
|
|
if (ret >= 0)
|
||
|
|
tst_resm(TPASS, "get correct shared memory id for index: %d",
|
||
|
|
shm_index);
|
||
|
|
else
|
||
|
|
tst_resm(TFAIL, "shared memory id is incorrect, index: %d",
|
||
|
|
shm_index);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void func_sstat_setup(void)
|
||
|
|
{
|
||
|
|
struct shm_info tmp;
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
ret = shmctl(shm_id_1, SHM_INFO, (void *)&tmp);
|
||
|
|
if (ret < 0)
|
||
|
|
tst_resm(TFAIL|TERRNO, "shmctl(SHM_INFO)");
|
||
|
|
else
|
||
|
|
shm_index = ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void func_lock(int ret)
|
||
|
|
{
|
||
|
|
if (shmctl(shm_id_1, IPC_STAT, &buf) == -1) {
|
||
|
|
tst_resm(TBROK, "stat failed in func_lock()");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buf.shm_perm.mode & SHM_LOCKED)
|
||
|
|
tst_resm(TPASS, "SHM_LOCK is set");
|
||
|
|
else
|
||
|
|
tst_resm(TFAIL, "SHM_LOCK is cleared");
|
||
|
|
}
|
||
|
|
|
||
|
|
static void func_unlock(int ret)
|
||
|
|
{
|
||
|
|
if (shmctl(shm_id_1, IPC_STAT, &buf) == -1) {
|
||
|
|
tst_resm(TBROK, "stat failed in func_unlock()");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (buf.shm_perm.mode & SHM_LOCKED)
|
||
|
|
tst_resm(TFAIL, "SHM_LOCK is set");
|
||
|
|
else
|
||
|
|
tst_resm(TPASS, "SHM_LOCK is cleared");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* func_rmid() - check the functionality of the IPC_RMID command with shmctl()
|
||
|
|
*/
|
||
|
|
void func_rmid(int ret)
|
||
|
|
{
|
||
|
|
/* Do another shmctl() - we should get EINVAL */
|
||
|
|
if (shmctl(shm_id_1, IPC_STAT, &buf) != -1)
|
||
|
|
tst_brkm(TBROK, cleanup, "shmctl succeeded on expected fail");
|
||
|
|
|
||
|
|
if (errno != EINVAL)
|
||
|
|
tst_resm(TFAIL, "returned unexpected errno %d", errno);
|
||
|
|
else
|
||
|
|
tst_resm(TPASS, "shared memory appears to be removed");
|
||
|
|
|
||
|
|
shm_id_1 = -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* sighandler() - handle signals, in this case SIGUSR1 is the only one expected
|
||
|
|
*/
|
||
|
|
void sighandler(int sig)
|
||
|
|
{
|
||
|
|
if (sig != SIGUSR1)
|
||
|
|
tst_resm(TBROK, "received unexpected signal %d", sig);
|
||
|
|
}
|
||
|
|
|
||
|
|
void setup(void)
|
||
|
|
{
|
||
|
|
tst_sig(FORK, sighandler, cleanup);
|
||
|
|
|
||
|
|
TEST_PAUSE;
|
||
|
|
|
||
|
|
tst_tmpdir();
|
||
|
|
|
||
|
|
shmkey = getipckey();
|
||
|
|
}
|
||
|
|
|
||
|
|
void cleanup(void)
|
||
|
|
{
|
||
|
|
rm_shm(shm_id_1);
|
||
|
|
|
||
|
|
tst_rmdir();
|
||
|
|
}
|