usr/src/cmd/mail/islocal.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/param.h>
  33 #include "mail.h"
  34
  35 /*
  36  * islocal (char *user, uid_t *puid) - see if user exists on this system
  37  */
  38 int
  39 islocal(char *user, uid_t *puid)
  40 {
  41         char    fname[MAXPATHLEN];
  42         struct stat statb;
  43         struct passwd *pwd_ptr;
  44
  45         /* Check for existing mailfile first */
  46         (void) snprintf(fname, sizeof (fname), "%s%s", maildir, user);
  47         if (stat(fname, &statb) == 0) {
  48                 *puid = statb.st_uid;
  49                 return (TRUE);
  50         }
  51
  52         /* If no existing mailfile, check passwd file */
  53         setpwent();
  54         if ((pwd_ptr = getpwnam(user)) == NULL) {
  55                 return (FALSE);
  56         }
  57         *puid = pwd_ptr->pw_uid;
  58         return (TRUE);
  59 }