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/*
* Compiz configuration system library
*
* Copyright (C) 2007 Danny Baumann <maniac@opencompositing.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include "../config.h"
#endif
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <malloc.h>
#if HAVE_SYS_INOTIFY_H
#include <sys/inotify.h>
#endif
#include <fcntl.h>
#include <ccs.h>
#include "ccs-private.h"
typedef struct _FilewatchData
{
char *fileName;
int watchDesc;
unsigned int watchId;
FileWatchCallbackProc callback;
void *closure;
}
FilewatchData;
static FilewatchData *fwData = NULL;
static int fwDataSize = 0;
static int inotifyFd = 0;
static inline int
findDataIndexById (unsigned int watchId)
{
int i, index = -1;
for (i = 0; i < fwDataSize; i++)
if (fwData[i].watchId == watchId)
{
index = i;
break;
}
return index;
}
void ccsCheckFileWatches (void)
{
#if HAVE_SYS_INOTIFY_H
char buf[256 * (sizeof (struct inotify_event) + 16)];
struct inotify_event *event;
int len, i = 0, j;
if (!inotifyFd)
return;
len = read (inotifyFd, buf, sizeof (buf));
if (len < 0)
return;
while (i < len)
{
event = (struct inotify_event *) & buf[i];
for (j = 0; j < fwDataSize; j++)
if ((fwData[j].watchDesc == event->wd) && fwData[j].callback)
(*fwData[j].callback) (fwData[j].watchId, fwData[j].closure);
i += sizeof (*event) + event->len;
}
#endif
}
unsigned int ccsAddFileWatch (const char *fileName,
Bool enable,
FileWatchCallbackProc callback,
void *closure)
{
unsigned int i, maxWatchId = 0;
#if HAVE_SYS_INOTIFY_H
if (!inotifyFd)
{
inotifyFd = inotify_init ();
fcntl (inotifyFd, F_SETFL, O_NONBLOCK);
}
#endif
fwData = realloc (fwData, (fwDataSize + 1) * sizeof (FilewatchData));
if (!fwData)
{
fwDataSize = 0;
return 0;
}
fwData[fwDataSize].fileName = strdup (fileName);
#if HAVE_SYS_INOTIFY_H
if (enable)
fwData[fwDataSize].watchDesc =
inotify_add_watch (inotifyFd, fileName,
IN_MODIFY | IN_MOVE | IN_MOVE_SELF |
IN_DELETE_SELF | IN_CREATE | IN_DELETE);
else
#endif
fwData[fwDataSize].watchDesc = 0;
fwData[fwDataSize].callback = callback;
fwData[fwDataSize].closure = closure;
/* determine current highest ID */
for (i = 0; i < fwDataSize; i++)
if (fwData[i].watchId > maxWatchId)
maxWatchId = fwData[i].watchId;
fwData[fwDataSize].watchId = maxWatchId + 1;
fwDataSize++;
return (maxWatchId + 1);
}
void
ccsRemoveFileWatch (unsigned int watchId)
{
int selectedIndex, i;
selectedIndex = findDataIndexById (watchId);
/* not found */
if (selectedIndex < 0)
return;
/* clear entry */
free (fwData[selectedIndex].fileName);
#if HAVE_SYS_INOTIFY_H
if (fwData[selectedIndex].watchDesc)
inotify_rm_watch (inotifyFd, fwData[selectedIndex].watchDesc);
#endif
/* shrink array */
for (i = selectedIndex; i < (fwDataSize - 1); i++)
fwData[i] = fwData[i+1];
fwDataSize--;
if (fwDataSize > 0)
{
fwData = realloc (fwData, fwDataSize * sizeof (FilewatchData));
if (!fwData)
fwDataSize = 0;
}
else
{
free (fwData);
fwData = NULL;
}
if (!fwDataSize)
{
if (inotifyFd)
close (inotifyFd);
inotifyFd = 0;
}
}
void
ccsDisableFileWatch (unsigned int watchId)
{
int index;
index = findDataIndexById (watchId);
if (index < 0)
return;
#if HAVE_SYS_INOTIFY_H
if (fwData[index].watchDesc)
{
inotify_rm_watch (inotifyFd, fwData[index].watchDesc);
fwData[index].watchDesc = 0;
}
#endif
}
void
ccsEnableFileWatch (unsigned int watchId)
{
int index;
index = findDataIndexById (watchId);
if (index < 0)
return;
#if HAVE_SYS_INOTIFY_H
if (!fwData[index].watchDesc)
fwData[index].watchDesc =
inotify_add_watch (inotifyFd,
fwData[index].fileName,
IN_MODIFY | IN_MOVE | IN_MOVE_SELF |
IN_DELETE_SELF | IN_CREATE | IN_DELETE);
#endif
}
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