1/* 2 * Use set/get/endpwent calls from two processes to iterate over the 3 * password database. This checks the multithreaded stuff works. 4 */ 5 6#include <stdio.h> 7#include <pwd.h> 8#include <sys/types.h> 9#include <sys/stat.h> 10#include <fcntl.h> 11#include <errno.h> 12#include <wait.h> 13 14void dump_pwent(char *id) 15{ 16 struct passwd *pw; 17 char fname[255]; 18 FILE *fptr; 19 20 /* Open results file */ 21 22 sprintf(fname, "/tmp/getpwent_r-%s.out-%d", id, getpid()); 23 24 if ((fptr = fopen(fname, "w")) == 0) { 25 fprintf(stderr, "ERROR: could not open file %s: %s\n", fname, 26 sys_errlist[errno]); 27 return; 28 } 29 30 /* Dump passwd database */ 31 32 setpwent(); 33 34 while((pw = getpwent()) != NULL) { 35 fprintf(fptr,"%s:%s:%s:%d:%d\n", pw->pw_name, pw->pw_passwd, 36 pw->pw_gecos, pw->pw_uid, pw->pw_gid); 37 } 38 39 endpwent(); 40 41 /* Close results file */ 42 43 fclose(fptr); 44} 45 46#define NUM_FORKS 2 47 48int main(int argc, char **argv) 49{ 50 pid_t pids[NUM_FORKS]; 51 int i, status; 52 53 /* Check args */ 54 55 if (argc != 2) { 56 printf("ERROR: must specify output file identifier\n"); 57 return 1; 58 } 59 60 for(i = 0; i < NUM_FORKS; i++) { 61 62 /* Fork off lots */ 63 64 if ((pids[i] = fork()) == -1) { 65 perror("fork"); 66 return 1; 67 } 68 69 /* Child does tests */ 70 71 if (pids[i] == 0) { 72 dump_pwent(argv[1]); 73 return 0; 74 } 75 } 76 77 /* Wait for everyone to finish */ 78 79 for (i = 0; i < NUM_FORKS; i++) { 80 waitpid(pids[i], &status, 0); 81 } 82 83 printf("PASS: getpwent_r.c\n"); 84 return 0; 85} 86