usr/src/cmd/mail/lock.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 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 /*
  27  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include "mail.h"
  34
  35 void
  36 lock(char *user)
  37 {
  38         char    tbuf[80];
  39
  40         switch (maillock(user, 10)) {
  41         case L_SUCCESS:
  42             return;
  43         case L_NAMELEN:
  44             (void) snprintf(tbuf, sizeof (tbuf),
  45                 "%s: Cannot create lock file. Username '%s' is > 13 chars\n",
  46                 program, user);
  47             break;
  48         case L_TMPLOCK:
  49             strcpy(tbuf, "Cannot create temp lock file\n");
  50             break;
  51         case L_TMPWRITE:
  52             strcpy(tbuf, "Error writing pid to lock file\n");
  53             break;
  54         case L_MAXTRYS:
  55             strcpy(tbuf, "Creation of lockfile failed after 10 tries");
  56             break;
  57         case L_ERROR:
  58             strcpy(tbuf, "Cannot link temp lockfile to lockfile\n");
  59             break;
  60         case L_MANLOCK:
  61             strcpy(tbuf, "Cannot set mandatory file lock on temp lockfile\n");
  62             break;
  63         }
  64         errmsg(E_LOCK, tbuf);
  65         if (sending) {
  66                 goback(0);
  67         }
  68         done(0);
  69 }
  70
  71 void unlock() {
  72         mailunlock();
  73 }