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/* $Id: mboxlock.C,v 1.2 2008/05/24 17:57:42 mrsam Exp $
**
** Copyright 2002, Double Precision Inc.
**
** See COPYING for distribution information.
*/
#include "libmail_config.h"
#include "mboxlock.H"
#include "mboxopen.H"
#include "file.H"
#include <cstring>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
using namespace std;
//
// Stub callback used for the OpenTask that updates the internal folder
// index. When OpenTask completes this object goes back on the queue.
//
mail::mbox::LockTask::reopenCallback::reopenCallback(mail::mbox::LockTask *t)
: task(t)
{
}
mail::mbox::LockTask::reopenCallback::~reopenCallback()
{
}
void mail::mbox::LockTask::reopenCallback::success(string msg)
{
try {
task->mboxAccount.installTask(task);
} catch (...) {
delete task;
LIBMAIL_THROW();
}
}
void mail::mbox::LockTask::reopenCallback::fail(string msg)
{
task->fail(msg);
}
////////////////////////////////////////////////////////////////////////
mail::mbox::LockTask::LockTask(mail::mbox &mboxAccount,
mail::callback &callbackArg, string filenameArg)
: TimedTask(mboxAccount, callbackArg), reopen(this),
filename(filenameArg)
{
}
mail::mbox::LockTask::~LockTask()
{
}
bool mail::mbox::LockTask::doit()
{
for (;;)
{
string pathStr=filename;
bool ro=false;
if (pathStr.size() == 0)
{
pathStr=mboxAccount.currentFolder;
ro=mboxAccount.currentFolderReadOnly;
}
if (pathStr.size() == 0)
{
callback.success("Folder locked");
done();
return true;
}
struct stat stat_buf;
if (pathStr == "INBOX")
pathStr=mboxAccount.inboxMailboxPath;
if (mboxAccount.multiLockLock &&
mboxAccount.multiLockFilename == pathStr)
{
return locked( *mboxAccount.multiLockLock, pathStr);
}
mail::mbox::lock mailbox_lock( pathStr );
if (!mailbox_lock(ro))
{
// TODO: fail if EEXIST
if (errno != EAGAIN && errno != EEXIST)
{
fail(pathStr + ": " + strerror(errno));
return true;
}
return false;
}
if (filename.size() > 0)
// Locked another folder, no need
// to check.
{
try {
return locked(mailbox_lock, pathStr);
} catch (...) {
fail("Exception caught while accessing folder.");
}
return true;
}
if (fstat(mailbox_lock.getfd(), &stat_buf) < 0)
{
fail(pathStr + ": " + strerror(errno));
return true;
}
if (stat_buf.st_size != mboxAccount.folderSavedSize ||
stat_buf.st_mtime != mboxAccount.folderSavedTimestamp)
break;
try {
return locked(mailbox_lock, pathStr);
} catch (...) {
fail("Exception caught while accessing folder.");
}
return true;
}
// Uh-oh, something happened to the folder.
OpenTask *t=new OpenTask(mboxAccount, mboxAccount.currentFolder, reopen, NULL);
if (!t)
{
fail(mboxAccount.currentFolder + ": " + strerror(errno));
return true;
}
try {
mboxAccount.tasks.pop();
} catch (...) {
delete t;
LIBMAIL_THROW();
}
try {
mboxAccount.installTask(t);
} catch (...) {
fail("Exception caught while accessing folder.");
}
return true;
}
bool mail::mbox::LockTask::locked(mail::mbox::lock &mlock, string path)
{
mail::file mboxFp(mlock.getfd(),
mlock.readOnly() ? "r":"r+");
if (!mboxFp)
{
fail(strerror(errno));
return true;
}
return (locked(mboxFp));
}
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