/* * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. * Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * You should have received a copy of the GNU General Public License along * with this program; if not, write the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * */ /* * Check for equality of pid of child & return value of clone(2) * Test: * Open a pipe. * Loop if the proper options are given. * Call clone(2) called without SIGCHLD * * CHILD: * writes the pid to pipe * PARENT: * reads child'd pid from pipe * if child's pid == return value from clone(2) * Test passed * else * test failed */ #if defined UCLINUX && !__THROW /* workaround for libc bug */ #define __THROW #endif #include <errno.h> #include <sched.h> #include <sys/wait.h> #include "test.h" #include "clone_platform.h" static void setup(void); static void cleanup(void); static int child_fn(); static int pfd[2]; char *TCID = "clone03"; int TST_TOTAL = 1; int main(int ac, char **av) { int lc; void *child_stack; char buff[10]; int child_pid, status; tst_parse_opts(ac, av, NULL, NULL); setup(); /* Allocate stack for child */ child_stack = malloc(CHILD_STACK_SIZE); if (child_stack == NULL) tst_brkm(TBROK, cleanup, "Cannot allocate stack for child"); for (lc = 0; TEST_LOOPING(lc); lc++) { tst_count = 0; if ((pipe(pfd)) == -1) tst_brkm(TBROK | TERRNO, cleanup, "pipe failed"); TEST(ltp_clone(SIGCHLD, child_fn, NULL, CHILD_STACK_SIZE, child_stack)); if (TEST_RETURN == -1) tst_brkm(TFAIL | TTERRNO, cleanup, "clone() failed"); /* close write end from parent */ if ((close(pfd[1])) == -1) tst_brkm(TBROK | TERRNO, cleanup, "close(pfd[1]) failed"); /* Read pid from read end */ if ((read(pfd[0], buff, sizeof(buff))) == -1) tst_brkm(TBROK | TERRNO, cleanup, "read from pipe failed"); /* Close read end from parent */ if ((close(pfd[0])) == -1) tst_resm(TWARN | TERRNO, "close(pfd[0]) failed"); /* Get child's pid from pid string */ child_pid = atoi(buff); if (TEST_RETURN == child_pid) tst_resm(TPASS, "Test passed"); else tst_resm(TFAIL, "Test failed"); if ((wait(&status)) == -1) tst_brkm(TBROK | TERRNO, cleanup, "wait failed, status: %d", status); } free(child_stack); cleanup(); tst_exit(); } static void setup(void) { tst_sig(FORK, DEF_HANDLER, cleanup); TEST_PAUSE; } static void cleanup(void) { } static int child_fn(void) { char pid[10]; /* Close read end from child */ if ((close(pfd[0])) == -1) perror("close(pfd[0]) failed"); sprintf(pid, "%d", getpid()); /* Write pid string to pipe */ if ((write(pfd[1], pid, sizeof(pid))) == -1) perror("write to pipe failed"); /* Close write end of pipe from child */ if ((close(pfd[1])) == -1) perror("close(pfd[1]) failed"); exit(1); }