1 /* 2 * Copyright (c) 2013 Oracle and/or its affiliates. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License as 6 * published by the Free Software Foundation; either version 2 of 7 * the License, or (at your option) any later version. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 * 18 * Author: Alexey Kodanev <alexey.kodanev (at) oracle.com> 19 * 20 */ 21 22 #include <errno.h> 23 #include <sys/types.h> 24 #include <sys/stat.h> 25 #include <sys/wait.h> 26 #include <fcntl.h> 27 #include <unistd.h> 28 #include <signal.h> 29 #include "test.h" 30 31 #define OPEN_MODE (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH) 32 #define OPEN_FLAGS (O_WRONLY | O_APPEND | O_CREAT) 33 34 int tst_run_cmd_fds_(void (cleanup_fn)(void), 35 const char *const argv[], 36 int stdout_fd, 37 int stderr_fd, 38 int pass_exit_val) 39 { 40 int rc; 41 42 if (argv == NULL || argv[0] == NULL) { 43 tst_brkm(TBROK, cleanup_fn, 44 "argument list is empty at %s:%d", __FILE__, __LINE__); 45 } 46 47 /* 48 * The tst_sig() install poisoned signal handlers for all signals the 49 * test is not expected to get. 50 * 51 * So we temporarily disable the handler for sigchild we get after our 52 * child exits so that we don't have to disable it in each test that 53 * uses this interface. 54 */ 55 void *old_handler = signal(SIGCHLD, SIG_DFL); 56 57 pid_t pid = vfork(); 58 if (pid == -1) { 59 tst_brkm(TBROK | TERRNO, cleanup_fn, "vfork failed at %s:%d", 60 __FILE__, __LINE__); 61 } 62 if (!pid) { 63 /* redirecting stdout and stderr if needed */ 64 if (stdout_fd != -1) { 65 close(STDOUT_FILENO); 66 dup2(stdout_fd, STDOUT_FILENO); 67 } 68 69 if (stderr_fd != -1) { 70 close(STDERR_FILENO); 71 dup2(stderr_fd, STDERR_FILENO); 72 } 73 74 if (execvp(argv[0], (char *const *)argv)) { 75 if (errno == ENOENT) 76 _exit(255); 77 } 78 _exit(254); 79 } 80 81 int ret = -1; 82 if (waitpid(pid, &ret, 0) != pid) { 83 tst_brkm(TBROK | TERRNO, cleanup_fn, "waitpid failed at %s:%d", 84 __FILE__, __LINE__); 85 } 86 87 signal(SIGCHLD, old_handler); 88 89 if (!WIFEXITED(ret)) { 90 tst_brkm(TBROK, cleanup_fn, "failed to exec cmd '%s' at %s:%d", 91 argv[0], __FILE__, __LINE__); 92 } 93 94 rc = WEXITSTATUS(ret); 95 96 if ((!pass_exit_val) && rc) 97 tst_brkm(TBROK, cleanup_fn, 98 "'%s' exited with a non-zero code %d at %s:%d", 99 argv[0], rc, __FILE__, __LINE__); 100 101 return rc; 102 } 103 104 int tst_run_cmd_(void (cleanup_fn)(void), 105 const char *const argv[], 106 const char *stdout_path, 107 const char *stderr_path, 108 int pass_exit_val) 109 { 110 int stdout_fd = -1; 111 int stderr_fd = -1; 112 int rc; 113 114 if (stdout_path != NULL) { 115 stdout_fd = open(stdout_path, 116 OPEN_FLAGS, OPEN_MODE); 117 118 if (stdout_fd == -1) 119 tst_resm(TWARN | TERRNO, 120 "open() on %s failed at %s:%d", 121 stdout_path, __FILE__, __LINE__); 122 } 123 124 if (stderr_path != NULL) { 125 stderr_fd = open(stderr_path, 126 OPEN_FLAGS, OPEN_MODE); 127 128 if (stderr_fd == -1) 129 tst_resm(TWARN | TERRNO, 130 "open() on %s failed at %s:%d", 131 stderr_path, __FILE__, __LINE__); 132 } 133 134 rc = tst_run_cmd_fds(cleanup_fn, argv, stdout_fd, stderr_fd, 135 pass_exit_val); 136 137 if ((stdout_fd != -1) && (close(stdout_fd) == -1)) 138 tst_resm(TWARN | TERRNO, 139 "close() on %s failed at %s:%d", 140 stdout_path, __FILE__, __LINE__); 141 142 if ((stderr_fd != -1) && (close(stderr_fd) == -1)) 143 tst_resm(TWARN | TERRNO, 144 "close() on %s failed at %s:%d", 145 stderr_path, __FILE__, __LINE__); 146 147 return rc; 148 } 149 150 int tst_system(const char *command) 151 { 152 int ret = 0; 153 154 /* 155 *Temporarily disable SIGCHLD of user defined handler, so the 156 *system(3) function will not cause unexpected SIGCHLD signal 157 *callback function for test cases. 158 */ 159 void *old_handler = signal(SIGCHLD, SIG_DFL); 160 161 ret = system(command); 162 163 signal(SIGCHLD, old_handler); 164 return ret; 165 } 166
