/* 
 * printowner - print the name of the owner of a file or directory
 *
 * public domain, written by phoebos in 2022
 */

#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <stdio.h>
#include <sys/stat.h>

int main(int argc, char **argv) {
    struct stat sb;
    struct passwd *pw;

    if (argc != 2) {
        fprintf(stderr, "usage: %s file\n", argv[0]);
        return 1;
    }

    if (stat(argv[1], &sb) != 0) {
        perror(argv[1]);
        return 1;
    }

    errno = 0;
    pw = getpwuid(sb.st_uid);
    if (pw == NULL) {
        if (errno != 0)
            perror("getpwuid");
        else
            fprintf(stderr, "%s: user not found\n", argv[0]);
        return 1;
    }

    printf("%s\n", pw->pw_name);
    return 0;
}