eio_monitor_add() tutorial

To use eio_monitor_add(), you have to define callbacks for events declared by eio.

Available events are :

• EIO_MONITOR_FILE_CREATED
• EIO_MONITOR_FILE_DELETED
• EIO_MONITOR_FILE_MODIFIED
• EIO_MONITOR_FILE_CLOSED
• EIO_MONITOR_DIRECTORY_CREATED
• EIO_MONITOR_DIRECTORY_DELETED
• EIO_MONITOR_DIRECTORY_CLOSED
• EIO_MONITOR_SELF_RENAME
• EIO_MONITOR_SELF_DELETED

As nothing is worth an example, here it is :

* #include <Eina.h>
* #include <Ecore.h>
* #include <Eio.h>
*
* void file_modified(void *data, int type, void *event)
* {
*    const char *filename = (const char *)data;
*    printf("file %s ", filename);
*    if( type == EIO_MONITOR_FILE_MODIFIED )
*       printf("is being modified");
*    else if( type == EIO_MONITOR_FILE_CLOSED )
*       printf("is not more being modified");
*    else printf("got unexpected changes");
*    printf("\n");
* }
*
* int main(int argc, char **argv) {
*    Eio_Monitor *monitor  = NULL,
*                *monitor2 = NULL;
*    eio_init();
*    const char *filename = eina_stringshare_add("/tmp/eio_notify_testfile");
*
*    monitor  = eio_monitor_add(filename);
*    ecore_event_handler_add(EIO_MONITOR_FILE_MODIFIED, (Ecore_Event_Handler_Cb)file_modified, filename);
*    ecore_event_handler_add(EIO_MONITOR_FILE_CLOSED, (Ecore_Event_Handler_Cb)file_modified, filename);
*
*    ecore_main_loop_begin();
*    eio_shutdown();
*    eina_stringshare_del(filename);
* }
* 

Build the example doing :

gcc -o tutorial_monitor_add tutorial_monitor_add.c `pkg-config --libs --cflags eio ecore ecore-file eina`
* then create the file /tmp/eio_notify_testfile :
* touch /tmp/eio_notify_testfile
* and launch tutorial_monitor_add, and in another terminal, write into /tmp/eio_notify_testfile, doing for example :
* echo "test" >> /tmp/eio_notify_testfile
*