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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
#include "ecore_file_private.h"
/*
* TODO:
*
* - Listen to these events:
* IN_ACCESS, IN_ATTRIB, IN_CLOSE_WRITE, IN_CLOSE_NOWRITE, IN_OPEN
* - Read all events first, then call the callbacks. This will prevent several
* callbacks with the typic save cycle (delete file, new file)
* - Listen to IN_IGNORED, emitted when the watch is removed
*/
#ifdef HAVE_INOTIFY
#ifdef HAVE_SYS_INOTIFY
# include <sys/inotify.h>
#else
# include <asm/unistd.h>
# include <linux/inotify.h>
#endif
#ifndef HAVE_SYS_INOTIFY
static inline int inotify_init(void);
static inline int inotify_add_watch(int fd, const char *name, __u32 mask);
static inline int inotify_rm_watch(int fd, __u32 wd);
#endif
typedef struct _Ecore_File_Monitor_Inotify Ecore_File_Monitor_Inotify;
#define ECORE_FILE_MONITOR_INOTIFY(x) ((Ecore_File_Monitor_Inotify *)(x))
struct _Ecore_File_Monitor_Inotify
{
Ecore_File_Monitor monitor;
int wd;
};
static Ecore_Fd_Handler *_fdh = NULL;
static Ecore_File_Monitor *_monitors = NULL;
static pid_t _inotify_fd_pid = -1;
static Eina_Bool _ecore_file_monitor_inotify_handler(void *data, Ecore_Fd_Handler *fdh);
static Ecore_File_Monitor *_ecore_file_monitor_inotify_monitor_find(int wd);
static void _ecore_file_monitor_inotify_events(Ecore_File_Monitor *em, char *file, int mask);
static int _ecore_file_monitor_inotify_monitor(Ecore_File_Monitor *em, const char *path);
#if 0
static void _ecore_file_monitor_inotify_print(char *file, int mask);
#endif
int
ecore_file_monitor_inotify_init(void)
{
int fd;
fd = inotify_init();
if (fd < 0)
return 0;
_fdh = ecore_main_fd_handler_add(fd, ECORE_FD_READ, _ecore_file_monitor_inotify_handler,
NULL, NULL, NULL);
if (!_fdh)
{
close(fd);
return 0;
}
_inotify_fd_pid = getpid();
return 1;
}
int
ecore_file_monitor_inotify_shutdown(void)
{
int fd;
while(_monitors)
ecore_file_monitor_inotify_del(_monitors);
if (_fdh)
{
fd = ecore_main_fd_handler_fd_get(_fdh);
ecore_main_fd_handler_del(_fdh);
close(fd);
}
_inotify_fd_pid = -1;
return 1;
}
Ecore_File_Monitor *
ecore_file_monitor_inotify_add(const char *path,
void (*func) (void *data, Ecore_File_Monitor *em,
Ecore_File_Event event,
const char *path),
void *data)
{
Ecore_File_Monitor *em;
int len;
if (_inotify_fd_pid == -1) return NULL;
if (_inotify_fd_pid != getpid())
{
ecore_file_monitor_inotify_shutdown();
ecore_file_monitor_inotify_init();
}
em = calloc(1, sizeof(Ecore_File_Monitor_Inotify));
if (!em) return NULL;
em->func = func;
em->data = data;
em->path = strdup(path);
len = strlen(em->path);
if (em->path[len - 1] == '/' && strcmp(em->path, "/"))
em->path[len - 1] = 0;
_monitors = ECORE_FILE_MONITOR(eina_inlist_append(EINA_INLIST_GET(_monitors), EINA_INLIST_GET(em)));
if (ecore_file_exists(em->path))
{
if (!_ecore_file_monitor_inotify_monitor(em, em->path))
return NULL;
}
else
{
ecore_file_monitor_inotify_del(em);
return NULL;
}
return em;
}
void
ecore_file_monitor_inotify_del(Ecore_File_Monitor *em)
{
int fd;
if (_monitors)
_monitors = ECORE_FILE_MONITOR(eina_inlist_remove(EINA_INLIST_GET(_monitors), EINA_INLIST_GET(em)));
fd = ecore_main_fd_handler_fd_get(_fdh);
if (ECORE_FILE_MONITOR_INOTIFY(em)->wd)
inotify_rm_watch(fd, ECORE_FILE_MONITOR_INOTIFY(em)->wd);
free(em->path);
free(em);
}
static Eina_Bool
_ecore_file_monitor_inotify_handler(void *data __UNUSED__, Ecore_Fd_Handler *fdh)
{
Ecore_File_Monitor *em;
char buffer[16384];
struct inotify_event *event;
int i = 0;
int event_size;
ssize_t size;
size = read(ecore_main_fd_handler_fd_get(fdh), buffer, sizeof(buffer));
while (i < size)
{
event = (struct inotify_event *)&buffer[i];
event_size = sizeof(struct inotify_event) + event->len;
i += event_size;
em = _ecore_file_monitor_inotify_monitor_find(event->wd);
if (!em) continue;
_ecore_file_monitor_inotify_events(em, (event->len ? event->name : NULL), event->mask);
}
return ECORE_CALLBACK_RENEW;
}
static Ecore_File_Monitor *
_ecore_file_monitor_inotify_monitor_find(int wd)
{
Ecore_File_Monitor *l;
EINA_INLIST_FOREACH(_monitors, l)
{
if (ECORE_FILE_MONITOR_INOTIFY(l)->wd == wd)
return l;
}
return NULL;
}
static void
_ecore_file_monitor_inotify_events(Ecore_File_Monitor *em, char *file, int mask)
{
char buf[PATH_MAX];
int isdir;
if ((file) && (file[0]))
snprintf(buf, sizeof(buf), "%s/%s", em->path, file);
else
strcpy(buf, em->path);
isdir = mask & IN_ISDIR;
#if 0
_ecore_file_monitor_inotify_print(buf, mask);
#endif
if (mask & IN_ATTRIB)
{
em->func(em->data, em, ECORE_FILE_EVENT_MODIFIED, buf);
}
if (mask & IN_CLOSE_WRITE)
{
if (!isdir)
em->func(em->data, em, ECORE_FILE_EVENT_CLOSED, buf);
}
if (mask & IN_MODIFY)
{
if (!isdir)
em->func(em->data, em, ECORE_FILE_EVENT_MODIFIED, buf);
}
if (mask & IN_MOVED_FROM)
{
if (isdir)
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_DIRECTORY, buf);
else
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_FILE, buf);
}
if (mask & IN_MOVED_TO)
{
if (isdir)
em->func(em->data, em, ECORE_FILE_EVENT_CREATED_DIRECTORY, buf);
else
em->func(em->data, em, ECORE_FILE_EVENT_CREATED_FILE, buf);
}
if (mask & IN_DELETE)
{
if (isdir)
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_DIRECTORY, buf);
else
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_FILE, buf);
}
if (mask & IN_CREATE)
{
if (isdir)
em->func(em->data, em, ECORE_FILE_EVENT_CREATED_DIRECTORY, buf);
else
em->func(em->data, em, ECORE_FILE_EVENT_CREATED_FILE, buf);
}
if (mask & IN_DELETE_SELF)
{
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
}
if (mask & IN_MOVE_SELF)
{
/* We just call delete. The dir is gone... */
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
}
if (mask & IN_UNMOUNT)
{
/* We just call delete. The dir is gone... */
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
}
if (mask & IN_IGNORED)
{
/* The watch is removed. If the file name still exists monitor the new one,
* else delete it */
if (ecore_file_exists(em->path))
{
if (!_ecore_file_monitor_inotify_monitor(em, em->path))
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
}
else
em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
}
}
static int
_ecore_file_monitor_inotify_monitor(Ecore_File_Monitor *em, const char *path)
{
int mask =
IN_ATTRIB |
IN_CLOSE_WRITE |
IN_MOVED_FROM |
IN_MOVED_TO |
IN_DELETE |
IN_CREATE |
IN_MODIFY |
IN_DELETE_SELF |
IN_MOVE_SELF |
IN_UNMOUNT;
ECORE_FILE_MONITOR_INOTIFY(em)->wd =
inotify_add_watch(ecore_main_fd_handler_fd_get(_fdh), path, mask);
if (ECORE_FILE_MONITOR_INOTIFY(em)->wd < 0)
{
ERR("inotify_add_watch error");
ecore_file_monitor_inotify_del(em);
return 0;
}
return 1;
}
#ifndef HAVE_SYS_INOTIFY
static inline int
inotify_init(void)
{
return syscall(__NR_inotify_init);
}
static inline int
inotify_add_watch(int fd, const char *name, __u32 mask)
{
return syscall(__NR_inotify_add_watch, fd, name, mask);
}
static inline int
inotify_rm_watch(int fd, __u32 wd)
{
return syscall(__NR_inotify_rm_watch, fd, wd);
}
#endif
#if 0
static void
_ecore_file_monitor_inotify_print(char *file, int mask)
{
const char *type;
if (mask & IN_ISDIR)
type = "dir";
else
type = "file";
if (mask & IN_ACCESS)
INF("Inotify accessed %s: %s", type, file);
if (mask & IN_MODIFY)
INF("Inotify modified %s: %s", type, file);
if (mask & IN_ATTRIB)
INF("Inotify attributes %s: %s", type, file);
if (mask & IN_CLOSE_WRITE)
INF("Inotify close write %s: %s", type, file);
if (mask & IN_CLOSE_NOWRITE)
INF("Inotify close write %s: %s", type, file);
if (mask & IN_OPEN)
INF("Inotify open %s: %s", type, file);
if (mask & IN_MOVED_FROM)
INF("Inotify moved from %s: %s", type, file);
if (mask & IN_MOVED_TO)
INF("Inotify moved to %s: %s", type, file);
if (mask & IN_DELETE)
INF("Inotify delete %s: %s", type, file);
if (mask & IN_CREATE)
INF("Inotify create %s: %s", type, file);
if (mask & IN_DELETE_SELF)
INF("Inotify delete self %s: %s", type, file);
if (mask & IN_MOVE_SELF)
INF("Inotify move self %s: %s", type, file);
if (mask & IN_UNMOUNT)
INF("Inotify unmount %s: %s", type, file);
}
#endif
#endif /* HAVE_INOTIFY */
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