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/
usr/
src/
maildrop-2.2.0/
maildir/
- drwxr-xr-x
|
Viewing file:  maildirwatch.h (3.41 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef maildirwatch_h
#define maildirwatch_h
/*
** Copyright 2002 Double Precision, Inc.
** See COPYING for distribution information.
*/
static const char maildirwatch_h_rcsid[]="$Id: maildirwatch.h,v 1.8 2003/08/03 03:09:19 mrsam Exp $";
#ifdef __cplusplus
extern "C" {
#endif
#if HAVE_CONFIG_H
#include "config.h"
#endif
/*
** These function leverage libfam.a to watch for maildir changes.
**
** If libfam.a is not available, these functions are compiled to no-ops
*/
#if HAVE_FAM
#include <fam.h>
#endif
#if TIME_WITH_SYS_TIME
#include <sys/time.h>
#include <time.h>
#else
#if HAVE_SYS_TIME_H
#include <sys/time.h>
#else
#include <time.h>
#endif
#endif
#if HAVE_FAM
struct maildirwatch_fam {
FAMConnection fc;
int broken;
unsigned refcnt;
};
#endif
struct maildirwatch {
char *maildir;
#if HAVE_FAM
struct maildirwatch_fam *fam;
#endif
time_t now;
time_t timeout;
};
#define WATCHDOTLOCK "tmp/courier.lock"
#define KEYWORDDIR "courierimapkeywords"
struct maildirwatch *maildirwatch_alloc(const char *maildir);
void maildirwatch_free(struct maildirwatch *w);
/*
** Wait for WATCHDOTLOCK to go away
*/
void maildirwatch_cleanup();
/* Final cleanup before prog terminates */
int maildirwatch_unlock(struct maildirwatch *w, int nseconds);
/*********** Wait for changes to new and cur subdirs ************/
/* Caller must allocate the follownig structure: */
struct maildirwatch_contents {
struct maildirwatch *w;
#if HAVE_FAM
FAMRequest new_req;
FAMRequest cur_req;
FAMRequest courierimapkeywords_req;
unsigned short endexists_received;
unsigned short ack_received;
unsigned short cancelled;
#endif
};
/*
** maildirwatch_start() initiates the process of monitoring the maildir.
** The monitoring process does not get started right away, since FAM needs
** to acknowledge th monitoring requests first.
**
** Returns: 0 - monitoring request sent.
** 1 - FAM is not available, will fall back to 60 second polls.
** -1 - Fatal error.
*/
int maildirwatch_start(struct maildirwatch *p,
struct maildirwatch_contents *w);
/*
** Check if FAM started monitoring yet.
**
** Returns: 1 - Monitoring has started, or we're in fallback mode.
** 0 - Not yet, *fdret is initialized to file descriptor to wait on.
** -1 - A fatal error occured, fall back to polling mode.
**
** maildirwatch_started() returns right away, without blocking.
*/
int maildirwatch_started(struct maildirwatch_contents *w,
int *fdret);
/*
** Check if maildir's contents have changed.
**
** Returns: 0 - Monitoring in progress. *changed set to non-zero if maildir
** was changed.
** -1 - Fatal error.
**
** *fdret and *timeout get initialized to the file descriptor to wait on,
** and the requested timeout. *fdret may be negative in polling mode.
*/
int maildirwatch_check(struct maildirwatch_contents *w,
int *changed,
int *fdret,
int *timeout);
/*
** Clean everything up.
*/
void maildirwatch_end(struct maildirwatch_contents *w);
/*
** Courier-IMAP compatible maildir lock.
**
** Returns a non-NULL filename on success. To unlock:
**
** unlink(filename); free(filename);
**
** A NULL return with tryAnyway != 0 means that the lock failed
** probably as a result of misconfigured FAM, or something.
**
*/
char *maildir_lock(const char *maildir,
struct maildirwatch *w, /* If NULL, we sleep() */
int *tryAnyway);
#ifdef __cplusplus
}
#endif
#endif
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