diplodocus.org Git - nmh/blob - test/getfullname.c

   1 /*
   2  * getfullname.c - Extract a user's name out of the GECOS field in
   3  *                 the password file.
   4  *
   5  * This code is Copyright (c) 2012, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <sys/types.h>
  14 #include <pwd.h>
  15
  16 int
  17 main(int argc, char *argv[])
  18 {
  19         if (argc > 1) {
  20                 fprintf (stderr, "usage: %s\n", argv[0]);
  21         }
  22
  23         struct passwd *pwd;
  24
  25         pwd = getpwuid(getuid());
  26
  27         if (! pwd) {
  28                 fprintf(stderr, "Unable to retrieve user info for "
  29                         "userid %d\n", getuid());
  30                 exit(1);
  31         }
  32
  33         printf("%s\n", pwd->pw_gecos);
  34
  35         exit(0);
  36 }