1 files changed, 0 insertions, 419 deletions
diff --git a/camel/camel-lock.c b/camel/camel-lock.c
deleted file mode 100644
index d8064d5eff..0000000000
--- a/camel/camel-lock.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
- *
- * Author: Michael Zucchi <notzed@ximian.com>
- *
- * Copyright (C) 1999 Ximian (www.ximian.com/).
- *
- * This program is free software; you can redistribute it and/or 
- * modify it under the terms of the GNU General Public License as 
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <sys/stat.h>
-#include <unistd.h>
-#include <errno.h>
-#ifdef HAVE_ALLOCA_H
-#include <alloca.h>
-#endif
-#include <time.h>
-
-#ifdef USE_DOT
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#endif
-
-#ifdef USE_FCNTL
-#include <unistd.h>
-#include <fcntl.h>
-#endif
-
-#ifdef USE_FLOCK
-#include <sys/file.h>
-#endif
-
-#include "camel-lock.h"
-
-/* dunno where this fucking thing is got from */
-#define _(x) (x)
-
-#define d(x) /*(printf("%s(%d): ", __FILE__, __LINE__),(x))*/
-
-/**
- * camel_lock_dot:
- * @path: 
- * @ex: 
- * 
- * Create an exclusive lock using .lock semantics.
- * All locks are equivalent to write locks (exclusive).
- * 
- * Return value: -1 on error, sets @ex appropriately.
- **/
-int
-camel_lock_dot(const char *path, CamelException *ex)
-{
-#ifdef USE_DOT
-	char *locktmp, *lock;
-	int retry = 0;
-	int fdtmp;
-	struct stat st;
-
-	/* TODO: Is there a reliable way to refresh the lock, if we're still busy with it?
-	   Does it matter?  We will normally also use fcntl too ... */
-
-	/* use alloca, save cleaning up afterwards */
-	lock = alloca(strlen(path) + strlen(".lock") + 1);
-	sprintf(lock, "%s.lock", path);
-	locktmp = alloca(strlen(path) + strlen("XXXXXX") + 1);
-
-#ifndef HAVE_MKSTEMP
-	sprintf(locktmp, "%sXXXXXX", path);
-	if (mktemp(locktmp) == NULL) {
-		/* well, this is really only a programatic error */
-		camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Could not create lock file for %s: %s"), path, strerror(errno));
-		return -1;
-	}
-#endif
-
-	while (retry < CAMEL_LOCK_DOT_RETRY) {
-
-		d(printf("trying to lock '%s', attempt %d\n", lock, retry));
-
-		if (retry > 0)
-			sleep(CAMEL_LOCK_DOT_DELAY);
-
-#ifdef HAVE_MKSTEMP
-		sprintf(locktmp, "%sXXXXXX", path);
-		fdtmp = mkstemp(locktmp);
-#else
-		fdtmp = open(locktmp, O_RDWR|O_CREAT|O_EXCL, 0600);
-#endif
-		if (fdtmp == -1) {
-			camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Could not create lock file for %s: %s"), path, strerror(errno));
-			return -1;
-		}
-		close(fdtmp);
-
-		/* apparently return code from link can be unreliable for nfs (see link(2)), so we ignore it */
-		link(locktmp, lock);
-
-		/* but we check stat instead (again, see link(2)) */
-		if (stat(locktmp, &st) == -1) {
-			d(printf("Out lock file %s vanished!?\n", locktmp));
-
-			/* well that was unexpected, try cleanup/retry */
-			unlink(locktmp);
-			unlink(lock);
-		} else {
-			d(printf("tmp lock created, link count is %d\n", st.st_nlink));
-
-			unlink(locktmp);
-
-			/* if we had 2 links, we have created the .lock, return ok, otherwise we need to keep trying */
-			if (st.st_nlink == 2)
-				return 0;
-		}
-
-		/* check for stale lock, kill it */
-		if (stat(lock, &st) == 0) {
-			time_t now = time(0);
-			(printf("There is an existing lock %ld seconds old\n", now-st.st_ctime));
-			if (st.st_ctime < now - CAMEL_LOCK_DOT_STALE) {
-				d(printf("Removing it now\n"));
-				unlink(lock);
-			}
-		}
-
-		retry++;
-	}
-
-	d(printf("failed to get lock after %d retries\n", retry));
-
-	camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Timed out trying to get lock file on %s. Try again later."), path);
-	return -1;
-#else /* ! USE_DOT */
-	return 0;
-#endif
-}
-
-/**
- * camel_unlock_dot:
- * @path: 
- * 
- * Attempt to unlock a .lock lock.
- **/
-void
-camel_unlock_dot(const char *path)
-{
-#ifdef USE_DOT
-	char *lock;
-
-	lock = alloca(strlen(path) + strlen(".lock") + 1);
-	sprintf(lock, "%s.lock", path);
-	d(printf("unlocking %s\n", lock));
-	(void)unlink(lock);
-#endif
-}
-
-/**
- * camel_lock_fcntl:
- * @fd: 
- * @type: 
- * @ex: 
- * 
- * Create a lock using fcntl(2).
- *
- * @type is CAMEL_LOCK_WRITE or CAMEL_LOCK_READ,
- * to create exclusive or shared read locks
- * 
- * Return value: -1 on error.
- **/
-int
-camel_lock_fcntl(int fd, CamelLockType type, CamelException *ex)
-{
-#ifdef USE_FCNTL
-	struct flock lock;
-
-	d(printf("fcntl locking %d\n", fd));
-
-	memset(&lock, 0, sizeof(lock));
-	lock.l_type = type==CAMEL_LOCK_READ?F_RDLCK:F_WRLCK;
-	if (fcntl(fd, F_SETLK, &lock) == -1) {
-		/* If we get a 'locking not vailable' type error,
-		   we assume the filesystem doesn't support fcntl() locking */
-		/* this is somewhat system-dependent */
-		if (errno != EINVAL && errno != ENOLCK) {
-			camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Failed to get lock using fcntl(2): %s"),
-					     strerror(errno));
-			return -1;
-		} else {
-			static int failed = 0;
-
-			if (failed == 0)
-				fprintf(stderr, "fcntl(2) locking appears not to work on this filesystem");
-			failed++;
-		}
-	}
-#endif
-	return 0;
-}
-
-/**
- * camel_unlock_fcntl:
- * @fd: 
- * 
- * Unlock an fcntl lock.
- **/
-void
-camel_unlock_fcntl(int fd)
-{
-#ifdef USE_FCNTL
-	struct flock lock;
-
-	d(printf("fcntl unlocking %d\n", fd));
-
-	memset(&lock, 0, sizeof(lock));
-	lock.l_type = F_UNLCK;
-	fcntl(fd, F_SETLK, &lock);
-#endif
-}
-
-/**
- * camel_lock_flock:
- * @fd: 
- * @type: 
- * @ex: 
- * 
- * Create a lock using flock(2).
- * 
- * @type is CAMEL_LOCK_WRITE or CAMEL_LOCK_READ,
- * to create exclusive or shared read locks
- *
- * Return value: -1 on error.
- **/
-int
-camel_lock_flock(int fd, CamelLockType type, CamelException *ex)
-{
-#ifdef USE_FLOCK
-	int op;
-
-	d(printf("flock locking %d\n", fd));
-
-	if (type == CAMEL_LOCK_READ)
-		op = LOCK_SH|LOCK_NB;
-	else
-		op = LOCK_EX|LOCK_NB;
-
-	if (flock(fd, op) == -1) {
-		camel_exception_setv(ex, CAMEL_EXCEPTION_SYSTEM, _("Failed to get lock using flock(2): %s"), strerror(errno));
-		return -1;
-	}
-#endif
-	return 0;
-}
-
-/**
- * camel_unlock_flock:
- * @fd: 
- * 
- * Unlock an flock lock.
- **/
-void
-camel_unlock_flock(int fd)
-{
-#ifdef USE_FLOCK
-	d(printf("flock unlocking %d\n", fd));
-
-	(void)flock(fd, LOCK_UN);
-#endif
-}
-
-/**
- * camel_lock_folder:
- * @path: Path to the file to lock (used for .locking only).
- * @fd: Open file descriptor of the right type to lock.
- * @type: Type of lock, CAMEL_LOCK_READ or CAMEL_LOCK_WRITE.
- * @ex: 
- * 
- * Attempt to lock a folder, multiple attempts will be made using all
- * locking strategies available.
- * 
- * Return value: -1 on error, @ex will describe the locking system that failed.
- **/
-int
-camel_lock_folder(const char *path, int fd, CamelLockType type, CamelException *ex)
-{
-	int retry = 0;
-
-	while (retry < CAMEL_LOCK_RETRY) {
-		if (retry > 0)
-			sleep(CAMEL_LOCK_DELAY);
-
-		camel_exception_clear(ex);
-
-		if (camel_lock_fcntl(fd, type, ex) == 0) {
-			if (camel_lock_flock(fd, type, ex) == 0) {
-				if (camel_lock_dot(path, ex) == 0)
-					return 0;
-				camel_unlock_flock(fd);
-			}
-			camel_unlock_fcntl(fd);
-		}
-		retry++;
-	}
-
-	return -1;
-}
-
-/**
- * camel_unlock_folder:
- * @path: Filename of folder.
- * @fd: Open descrptor on which locks were placed.
- * 
- * Free a lock on a folder.
- **/
-void
-camel_unlock_folder(const char *path, int fd)
-{
-	camel_unlock_dot(path);
-	camel_unlock_flock(fd);
-	camel_unlock_fcntl(fd);
-}
-
-#if 0
-int main(int argc, char **argv)
-{
-	CamelException *ex;
-	int fd1, fd2;
-
-	ex = camel_exception_new();
-
-#if 0
-	if (camel_lock_dot("mylock", ex) == 0) {
-		if (camel_lock_dot("mylock", ex) == 0) {
-			printf("Got lock twice?\n");
-		} else {
-			printf("failed to get lock 2: %s\n", camel_exception_get_description(ex));
-		}
-		camel_unlock_dot("mylock");
-	} else {
-		printf("failed to get lock 1: %s\n", camel_exception_get_description(ex));
-	}
-
-	camel_exception_clear(ex);
-#endif
-
-	fd1 = open("mylock", O_RDWR);
-	fd2 = open("mylock", O_RDWR);
-
-	if (camel_lock_fcntl(fd1, CAMEL_LOCK_WRITE, ex) == 0) {
-		printf("got fcntl write lock once\n");
-		sleep(5);
-		if (camel_lock_fcntl(fd2, CAMEL_LOCK_WRITE, ex) == 0) {
-			printf("got fcntl write lock twice!\n");
-		} else {
-			printf("failed to get write lock: %s\n", camel_exception_get_description(ex));
-		}
-
-		camel_exception_clear(ex);
-
-		if (camel_lock_fcntl(fd2, CAMEL_LOCK_READ, ex) == 0) {
-			printf("got fcntl read lock as well?\n");
-			camel_unlock_fcntl(fd2);
-		} else {
-			printf("failed to get read lock: %s\n", camel_exception_get_description(ex));
-		}
-
-		camel_exception_clear(ex);
-		camel_unlock_fcntl(fd1);
-	} else {
-		printf("failed to get write lock at all: %s\n", camel_exception_get_description(ex));
-	}
-
-	if (camel_lock_fcntl(fd1, CAMEL_LOCK_READ, ex) == 0) {
-		printf("got fcntl read lock once\n");
-		sleep(5);
-		if (camel_lock_fcntl(fd2, CAMEL_LOCK_WRITE, ex) == 0) {
-			printf("got fcntl write lock too?!\n");
-		} else {
-			printf("failed to get write lock: %s\n", camel_exception_get_description(ex));
-		}
-
-		camel_exception_clear(ex);
-
-		if (camel_lock_fcntl(fd2, CAMEL_LOCK_READ, ex) == 0) {
-			printf("got fcntl read lock twice\n");
-			camel_unlock_fcntl(fd2);
-		} else {
-			printf("failed to get read lock: %s\n", camel_exception_get_description(ex));
-		}
-
-		camel_exception_clear(ex);
-		camel_unlock_fcntl(fd1);
-	}
-
-	close(fd1);
-	close(fd2);
-
-	return 0;
-}
-#endif