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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 */ 19 20 /* 21 * NAME 22 * fork03.c 23 * 24 * DESCRIPTION 25 * Check that child can use a large text space and do a large 26 * number of operations. 27 * 28 * ALGORITHM 29 * Fork one process, check for pid == 0 in child. 30 * Check for pid > 0 in parent after wait. 31 * 32 * USAGE 33 * fork03 34 * 35 * HISTORY 36 * 07/2001 Ported by Wayne Boyer 37 * 38 * RESTRICTIONS 39 * None 40 */ 41 42 #include <sys/types.h> 43 #include <sys/wait.h> 44 #include <stdio.h> 45 #include "test.h" 46 47 char *TCID = "fork03"; 48 int TST_TOTAL = 1; 49 50 static void setup(void); 51 static void cleanup(void); 52 53 int main(int ac, char **av) 54 { 55 float fl1, fl2; 56 int i; 57 int pid1, pid2, status; 58 59 int lc; 60 61 tst_parse_opts(ac, av, NULL, NULL); 62 63 setup(); 64 65 for (lc = 0; TEST_LOOPING(lc); lc++) { 66 tst_count = 0; 67 pid1 = fork(); 68 if (pid1 == -1) 69 tst_brkm(TBROK, cleanup, "fork() failed"); 70 71 if (pid1 == 0) { 72 /* child uses some cpu cycles */ 73 for (i = 1; i < 32767; i++) { 74 fl1 = 0.000001; 75 fl1 = fl2 = 0.000001; 76 fl1 = fl1 * 10.0; 77 fl2 = fl1 / 1.232323; 78 fl1 = fl2 - fl2; 79 fl1 = fl2; 80 } 81 82 /* Pid must always be zero in child */ 83 if (pid1 != 0) 84 exit(1); 85 else 86 exit(0); 87 } else { 88 tst_resm(TINFO, "process id in parent of child from " 89 "fork : %d", pid1); 90 pid2 = wait(&status); /* wait for child */ 91 92 if (pid1 != pid2) { 93 tst_resm(TFAIL, "pids don't match : %d vs %d", 94 pid1, pid2); 95 continue; 96 } 97 98 if ((status >> 8) != 0) { 99 tst_resm(TFAIL, "child exited with failure"); 100 continue; 101 } 102 103 tst_resm(TPASS, "test 1 PASSED"); 104 } 105 } 106 107 cleanup(); 108 tst_exit(); 109 } 110 111 static void setup(void) 112 { 113 tst_sig(FORK, DEF_HANDLER, cleanup); 114 TEST_PAUSE; 115 } 116 117 static void cleanup(void) 118 { 119 } 120
