usr/src/lib/libdscfg/common/cfg_lockd.h

   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 (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _CFG_LOCKD_H
  27 #define _CFG_LOCKD_H
  28
  29 #ifdef  __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 typedef enum    { LOCK_NOTLOCKED,       /* Unlock message */
  34                 LOCK_READ,              /* ask for read lock */
  35                 LOCK_WRITE,             /* ask for write lock */
  36                 LOCK_LOCKED,            /* lock has been taken */
  37                 LOCK_LOCKEDBY,          /* who has lock? */
  38                 LOCK_STAT,              /* ask daemon to print its state */
  39                 LOCK_ACK                /* acknowledge a notlocked msg */
  40                 } cfglockd_t;
  41
  42 typedef struct  sockaddr_in daemonaddr_t;
  43
  44 struct lock_msg {
  45         int32_t message;
  46         pid_t pid;
  47         int32_t order;
  48         uint8_t seq;
  49 };
  50
  51 #define CFG_PIDFILE     "/var/tmp/.cfglockd.pid"
  52 #define CFG_SERVER_PORT 50121u
  53 #define CFG_LF_EOF              -1
  54 #define CFG_LF_OKAY             1
  55 #define CFG_LF_AGAIN            0
  56 void    cfg_lfinit();
  57 int     cfg_filelock(int segment, int flag);
  58 int     cfg_fileunlock(int segment);
  59 void    cfg_readpid(int segment, pid_t *pidp);
  60 void    cfg_writepid(int segment, pid_t pid);
  61 void    cfg_enterpid();
  62 int     cfg_lockd_init();
  63 cfglockd_t      cfg_lockedby(pid_t *);
  64 void    cfg_lockd_rdlock();
  65 void    cfg_lockd_wrlock();
  66 void    cfg_lockd_unlock();
  67
  68 #ifdef  __cplusplus
  69 }
  70 #endif
  71
  72 #endif /* _CFG_LOCKD_H */