#include <sys/types.h> /* getpwnam() */#include <pwd.h> /* getpwnam() */#include <stdio.h> /* printf() */int main (void) { char **users = (char*[]){ "pegasus", "shanti", "jaguar", NULL }; struct passwd *passwdent; while (*users) { passwdent = getpwnam(*(users++)); printf("uid: %d\n", passwdent->pw_uid);; } return 0;}