1 /* 2 * Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved. 3 * Copyright (c) 2012 Wanlong Gao <gaowanlong (at) cn.fujitsu.com> 4 * 5 * This program is free software; you can redistribute it and/or modify it 6 * under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 12 * 13 * You should have received a copy of the GNU General Public License along 14 * with this program; if not, write the Free Software Foundation, Inc., 15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 16 * 17 */ 18 19 /* 20 * Test to verify inheritance of environment variables by child. 21 */ 22 23 #if defined UCLINUX && !__THROW 24 /* workaround for libc bug */ 25 #define __THROW 26 #endif 27 28 #include <errno.h> 29 #include <sched.h> 30 #include <sys/wait.h> 31 #include <fcntl.h> 32 #include "test.h" 33 #include "clone_platform.h" 34 35 #define MAX_LINE_LENGTH 256 36 37 static void setup(void); 38 static void cleanup(void); 39 static int child_environ(); 40 41 static int pfd[2]; 42 43 char *TCID = "clone06"; 44 int TST_TOTAL = 1; 45 46 int main(int ac, char **av) 47 { 48 49 int lc, status; 50 void *child_stack; 51 char *parent_env; 52 char buff[MAX_LINE_LENGTH]; 53 54 tst_parse_opts(ac, av, NULL, NULL); 55 56 setup(); 57 58 child_stack = malloc(CHILD_STACK_SIZE); 59 if (child_stack == NULL) 60 tst_brkm(TBROK, cleanup, "Cannot allocate stack for child"); 61 62 for (lc = 0; TEST_LOOPING(lc); lc++) { 63 tst_count = 0; 64 65 if ((pipe(pfd)) == -1) 66 tst_brkm(TBROK | TERRNO, cleanup, "pipe() failed"); 67 68 TEST(ltp_clone(SIGCHLD, child_environ, NULL, CHILD_STACK_SIZE, 69 child_stack)); 70 71 if (TEST_RETURN == -1) 72 tst_brkm(TFAIL | TTERRNO, cleanup, "clone failed"); 73 74 /* close write end from parent */ 75 if ((close(pfd[1])) == -1) 76 tst_resm(TWARN | TERRNO, "close(pfd[1]) failed"); 77 78 /* Read env var from read end */ 79 if ((read(pfd[0], buff, sizeof(buff))) == -1) 80 tst_brkm(TBROK | TERRNO, cleanup, 81 "read from pipe failed"); 82 83 /* Close read end from parent */ 84 if ((close(pfd[0])) == -1) 85 tst_resm(TWARN | TERRNO, "close(pfd[0]) failed"); 86 87 parent_env = getenv("TERM") ? : ""; 88 89 if ((strcmp(buff, parent_env)) == 0) 90 tst_resm(TPASS, "Test Passed"); 91 else 92 tst_resm(TFAIL, "Test Failed"); 93 94 if ((wait(&status)) == -1) 95 tst_brkm(TBROK | TERRNO, cleanup, 96 "wait failed, status: %d", status); 97 } 98 99 free(child_stack); 100 101 cleanup(); 102 tst_exit(); 103 } 104 105 static void setup(void) 106 { 107 tst_sig(FORK, DEF_HANDLER, cleanup); 108 TEST_PAUSE; 109 } 110 111 static void cleanup(void) 112 { 113 } 114 115 /* 116 * Function executed by child. 117 * Gets the value for environment variable,TERM & 118 * writes it to a pipe. 119 */ 120 static int child_environ(void) 121 { 122 123 char var[MAX_LINE_LENGTH]; 124 125 /* Close read end from child */ 126 if ((close(pfd[0])) == -1) 127 tst_brkm(TBROK | TERRNO, cleanup, "close(pfd[0]) failed"); 128 129 if ((sprintf(var, "%s", getenv("TERM") ? : "")) < 0) 130 tst_resm(TWARN | TERRNO, "sprintf() failed"); 131 132 if ((write(pfd[1], var, MAX_LINE_LENGTH)) == -1) 133 tst_resm(TWARN | TERRNO, "write to pipe failed"); 134 135 /* Close write end of pipe from child */ 136 if ((close(pfd[1])) == -1) 137 tst_resm(TWARN | TERRNO, "close(pfd[1]) failed"); 138 139 exit(0); 140 } 141
