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/*
* Copyright (C) 1999 Miquel van Smoorenburg
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* On Debian GNU/Linux systems, the complete text of the GNU Library
* General Public License can be found in `/usr/doc/copyright/LGPL'.
* You can also find a copy on the GNU website at http://www.gnu.org/
*/
#ifndef LOCKFILE_H_
#define LOCKFILE_H_
#ifdef __cplusplus
extern "C" {
#endif
/*
* Prototypes.
*/
int lockfile_create(const char *lockfile, int retries, int flags);
int lockfile_remove(const char *lockfile);
int lockfile_touch(const char *lockfile);
int lockfile_check(const char *lockfile, int flags);
/*
* Return values for lockfile_create()
*/
#define L_SUCCESS 0 /* Lockfile created */
#define L_NAMELEN 1 /* Recipient name too long */
#define L_TMPLOCK 2 /* Error creating temp lockfile */
#define L_TMPWRITE 3 /* Can't write pid into temp lockfile */
#define L_MAXTRYS 4 /* Failed after max. number of attempts */
#define L_ERROR 5 /* Unknown error; check errno */
#define L_MANLOCK 6 /* Cannot set mandatory lock on tempfile */
#define L_ORPHANED 7 /* Called with L_PPID but parent is gone */
#define L_RMSTALE 8 /* Failed to remove stale lockfile */
/*
* Flag values for lockfile_create()
*/
#define L_PID 16 /* Put PID in lockfile */
#define L_PPID 32 /* Put PPID in lockfile */
/*
* Experimental.
*/
struct lockargs_s_ {
int interval; /* Static interval between retries */
};
#define L_INTERVAL_D_ 64 /* Specify consistent retry interval */
#ifdef LOCKFILE_EXPERIMENTAL
#define lockargs lockargs_s_
#define L_INTERVAL L_INTERVAL_D_
int lockfile_create2(const char *lockfile, int retries,
int flags, struct lockargs *args, int args_sz);
#endif
#ifndef LIB
int check_sleep(int, int);
#endif
int is_maillock(const char *lockfile);
int lockfile_create_set_tmplock(const char *lockfile, volatile char **tmplock,
int retries, int flags, const struct lockargs_s_ *);
#ifdef __cplusplus
}
#endif
#endif /* _LOCKFILE_H */
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