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#include <errno.h>
#include <getopt.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
int
main(int argc, char *argv[])
{
/* TODO: support supplying username as an arg */
int c = getopt(argc, argv, "Ggnru");
errno = 0;
struct passwd *user_data = getpwnam(getlogin());
if(user_data == NULL) {
fprintf(stderr,
"id: %s: %s\n",
getlogin(),
errno == 0 ? "user not found" : strerror(errno));
return 1;
}
switch(c) {
case 'g':
case 'u':
printf("%u\n", user_data->pw_gid);
break;
case 'n':
printf("%s\n", user_data->pw_name);
break;
default:
printf("%u %s\n",
user_data->pw_gid,
user_data->pw_name); /* I know
* it does not work
* like this */
}
return 0;
}
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