src/protocols/zephyr/ZGetSender.c

   1 /* This file is part of the Project Athena Zephyr Notification System.
   2  * It contains source for the ZGetSender.c function.
   3  *
   4  *      Created by:     Robert French
   5  *
   6  *      $Source$
   7  *      $Author: warmenhoven $
   8  *
   9  *      Copyright (c) 1987, 1991 by the Massachusetts Institute of Technology.
  10  *      For copying and distribution information, see the file
  11  *      "mit-copyright.h".
  12  */
  13 /* $Header$ */
  14
  15 #include <internal.h>
  16
  17 #ifndef lint
  18 static const char rcsid_ZGetSender_c[] =
  19     "$Id: ZGetSender.c 2096 2001-07-31 01:00:39Z warmenhoven $";
  20 #endif
  21
  22 #include <pwd.h>
  23
  24 char *ZGetSender()
  25 {
  26     struct passwd *pw;
  27 #ifdef ZEPHYR_USES_KERBEROS
  28     char pname[ANAME_SZ], pinst[INST_SZ], prealm[REALM_SZ];
  29     static char sender[ANAME_SZ+INST_SZ+REALM_SZ+3] = "";
  30 #else
  31     static char sender[128] = "";
  32 #endif
  33
  34     /* Return it if already cached */
  35     if (*sender)
  36         return (sender);
  37
  38 #ifdef ZEPHYR_USES_KERBEROS
  39     if (krb_get_tf_fullname((char *)TKT_FILE, pname, pinst, prealm) == KSUCCESS)
  40     {
  41         (void) sprintf(sender, "%s%s%s@%s", pname, (pinst[0]?".":""),
  42                        pinst, prealm);
  43         return (sender);
  44     }
  45 #endif
  46
  47     /* XXX a uid_t is a u_short (now),  but getpwuid
  48      * wants an int. AARGH! */
  49     pw = getpwuid((int) getuid());
  50     if (!pw)
  51         return ("unknown");
  52     (void) sprintf(sender, "%s@%s", pw->pw_name, __Zephyr_realm);
  53     return (sender);
  54 }