usr.bin/mail/getname.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 4. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #ifndef lint
  31 #if 0
  32 static char sccsid[] = "@(#)getname.c   8.1 (Berkeley) 6/6/93";
  33 #endif
  34 #endif /* not lint */
  35 #include <sys/cdefs.h>
  36 __FBSDID("$FreeBSD$");
  37
  38 #include "rcv.h"
  39 #include <pwd.h>
  40 #include "extern.h"
  41
  42 /* Getname / getuserid for those with hashed passwd data base). */
  43
  44 /*
  45  * Search the passwd file for a uid. Return name on success, NULL on failure.
  46  */
  47 char *
  48 getname(int uid)
  49 {
  50         struct passwd *pw;
  51
  52         if ((pw = getpwuid(uid)) == NULL)
  53                 return (NULL);
  54         return (pw->pw_name);
  55 }
  56
  57 /*
  58  * Convert the passed name to a user id and return it.  Return -1
  59  * on error.
  60  */
  61 int
  62 getuserid(char name[])
  63 {
  64         struct passwd *pw;
  65
  66         if ((pw = getpwnam(name)) == NULL)
  67                 return (-1);
  68         return (pw->pw_uid);
  69 }