1/* 2 * Lookup a user by uid. 3 */ 4 5#include <stdio.h> 6#include <pwd.h> 7#include <sys/types.h> 8 9int main(int argc, char **argv) 10{ 11 struct passwd *pw; 12 uid_t uid; 13 14 /* Check args */ 15 16 if (argc != 2) { 17 printf("ERROR: no arg specified\n"); 18 exit(1); 19 } 20 21 if ((uid = atoi(argv[1])) == 0) { 22 printf("ERROR: invalid uid specified\n"); 23 exit(1); 24 } 25 26 /* Do getpwuid() */ 27 28 if ((pw = getpwuid(uid)) == NULL) { 29 printf("FAIL: uid %d does not exist\n", uid); 30 exit(1); 31 } 32 33 printf("PASS: uid %d exists\n", uid); 34 printf("pw_name = %s\n", pw->pw_name); 35 printf("pw_passwd = %s\n", pw->pw_passwd); 36 printf("pw_uid = %d\n", pw->pw_uid); 37 printf("pw_gid = %d\n", pw->pw_gid); 38 printf("pw_gecos = %s\n", pw->pw_gecos); 39 printf("pw_dir = %s\n", pw->pw_dir); 40 printf("pw_shell = %s\n", pw->pw_shell); 41 42 exit(0); 43} 44