| /* |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * NAME |
| * waitpid03.c |
| * |
| * DESCRIPTION |
| * Check that parent waits unitl specific child has returned. |
| * |
| * ALGORITHM |
| * Parent forks numerous (22 = MAXUPRC - 3) children, and starts waits : |
| * Should only wait for the specific child, a second wait on the same |
| * child should return with -1 and not one of the other zombied |
| * children. |
| * |
| * USAGE: <for command-line> |
| * waitpid03 [-c n] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -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 |
| * 07/2001 John George |
| * -Ported |
| * 04/2002 wjhuie sigset cleanups |
| * |
| * Restrictions |
| * None |
| */ |
| |
| #define DEBUG 0 |
| |
| #include <sys/types.h> |
| #include <signal.h> |
| #include <errno.h> |
| #include <sys/wait.h> |
| #include "test.h" |
| |
| static void do_child(int); |
| static void setup(void); |
| static void cleanup(void); |
| |
| char *TCID = "waitpid03"; |
| int TST_TOTAL = 1; |
| |
| #define MAXUPRC 25 |
| |
| static int condition_number; |
| |
| #ifdef UCLINUX |
| static void do_child_uclinux(void); |
| static int ikids_uclinux; |
| #endif |
| |
| int main(int argc, char **argv) |
| { |
| int lc; |
| const char *msg; |
| |
| int status, pid[25], ret; |
| |
| msg = parse_opts(argc, argv, NULL, NULL); |
| if (msg != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| #ifdef UCLINUX |
| maybe_run_child(&do_child, "d", &ikids_uclinux); |
| #endif |
| |
| setup(); |
| |
| /* check for looping state if -i option is given */ |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| /* reset tst_count in case we are looping */ |
| int ikids = 0; |
| tst_count = 0; |
| |
| /* |
| * Set SIGTERM to SIG_DFL as test driver sets up to ignore |
| * SIGTERM |
| */ |
| if ((sig_t) signal(SIGTERM, SIG_DFL) == SIG_ERR) { |
| tst_resm(TFAIL, "Signal SIGTERM failed, errno = %d", |
| errno); |
| |
| } |
| |
| while (++ikids < MAXUPRC) { |
| pid[ikids] = FORK_OR_VFORK(); |
| if (pid[ikids] > 0) { |
| if (DEBUG) |
| tst_resm(TINFO, "child # %d", ikids); |
| } else if (pid[ikids] == -1) { |
| tst_resm(TFAIL, "cannot open fork #%d", ikids); |
| } else { |
| #ifdef UCLINUX |
| if (self_exec(argv[0], "d", ikids) < 0) { |
| tst_resm(TFAIL, "cannot self_exec #%d", |
| ikids); |
| } |
| #else |
| do_child(ikids); |
| #endif |
| } |
| } |
| |
| for (ikids = 1; ikids < MAXUPRC; ikids++) { |
| if (DEBUG) |
| tst_resm(TINFO, "Killing #%d", ikids); |
| kill(pid[ikids], 15); |
| } |
| |
| condition_number = 1; |
| |
| /* Wait on one specific child */ |
| if (DEBUG) |
| tst_resm(TINFO, "Waiting for child:#%d", MAXUPRC / 2); |
| ret = waitpid(pid[MAXUPRC / 2], &status, 0); |
| if (ret != pid[MAXUPRC / 2]) { |
| tst_resm(TFAIL, "condition %d test failed. " |
| "waitpid(%d) returned %d.", |
| condition_number, pid[MAXUPRC / 2], ret); |
| } else { |
| tst_resm(TPASS, "Got correct child PID"); |
| } |
| condition_number++; |
| |
| /* |
| * Child has already been waited on, waitpid should return |
| * -1 |
| */ |
| ret = waitpid(pid[MAXUPRC / 2], &status, 0); |
| if (ret != -1) { |
| tst_resm(TFAIL, "condition %d test failed", |
| condition_number); |
| } else { |
| tst_resm(TPASS, "Condition %d test passed", |
| condition_number); |
| } |
| condition_number++; |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void do_child(int ikids) |
| { |
| if (DEBUG) |
| tst_resm(TINFO, "child:%d", ikids); |
| pause(); |
| exit(0); |
| } |
| |
| #ifdef UCLINUX |
| /* |
| * do_child_uclinux() |
| * run do_child with the appropriate ikids variable |
| */ |
| static void do_child_uclinux(void) |
| { |
| do_child(ikids_uclinux); |
| } |
| #endif |
| |
| static void setup(void) |
| { |
| TEST_PAUSE; |
| } |
| |
| static void cleanup(void) |
| { |
| } |