1 #include <stdlib.h> 2 #include <string.h> 3 #include <limits.h> 4 #include <fcntl.h> 5 #include <sys/wait.h> 6 7 #include "common.h" 8 9 /* 10 * Test for dynamic executables with no read permissions. This test relies on 11 * being linked dynamically. 12 */ 13 int 14 main(int argc, char ** argv) 15 { 16 char *executable, cp_cmd[PATH_MAX + 9]; 17 int status; 18 19 if (strcmp(argv[0], "DO CHECK") == 0) 20 exit(EXIT_SUCCESS); 21 22 start(86); 23 24 /* Make a copy of this binary which is executable-only. */ 25 executable = argv[0]; 26 27 snprintf(cp_cmd, sizeof(cp_cmd), "cp ../%s .", executable); 28 status = system(cp_cmd); 29 if (status < 0 || !WIFEXITED(status) || 30 WEXITSTATUS(status) != EXIT_SUCCESS) e(0); 31 32 if (chmod(executable, S_IXUSR) != 0) e(0); 33 34 /* Invoke the changed binary in a child process. */ 35 switch (fork()) { 36 case -1: 37 e(0); 38 case 0: 39 execl(executable, "DO CHECK", NULL); 40 41 exit(EXIT_FAILURE); 42 default: 43 if (wait(&status) <= 0) e(0); 44 if (!WIFEXITED(status) || WEXITSTATUS(status) != EXIT_SUCCESS) 45 e(0); 46 } 47 48 quit(); 49 /* NOTREACHED */ 50 } 51