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- /*This is the sample program to notify us for the file creation and file deletion takes place in “/tmp” directory*/
- #include <stdio.h>
- #include <stdlib.h>
- #include <errno.h>
- #include <sys/types.h>
- #include <linux/inotify.h>
- #define EVENT_SIZE ( sizeof (struct inotify_event) )
- #define EVENT_BUF_LEN ( 1024 * ( EVENT_SIZE + 16 ) )
- int main( )
- {
- int length, i = 0;
- int fd;
- int wd;
- char buffer[EVENT_BUF_LEN];
- /*creating the INOTIFY instance*/
- fd = inotify_init();
- /*checking for error*/
- if ( fd < 0 ) {
- perror( "inotify_init" );
- }
- /*adding the “/tmp” directory into watch list. Here, the suggestion is to validate the existence of the directory before adding into monitoring list.*/
- wd = inotify_add_watch( fd, "/tmp", IN_CREATE | IN_DELETE );
- /*read to determine the event change happens on “/tmp” directory. Actually this read blocks until the change event occurs*/
- length = read( fd, buffer, EVENT_BUF_LEN );
- /*checking for error*/
- if ( length < 0 ) {
- perror( "read" );
- }
- /*actually read return the list of change events happens. Here, read the change event one by one and process it accordingly.*/
- while ( i < length ) { struct inotify_event *event = ( struct inotify_event * ) &buffer[ i ]; if ( event->len ) {
- if ( event->mask & IN_CREATE ) {
- if ( event->mask & IN_ISDIR ) {
- printf( "New directory %s created.\n", event->name );
- }
- else {
- printf( "New file %s created.\n", event->name );
- }
- }
- else if ( event->mask & IN_DELETE ) {
- if ( event->mask & IN_ISDIR ) {
- printf( "Directory %s deleted.\n", event->name );
- }
- else {
- printf( "File %s deleted.\n", event->name );
- }
- }
- }
- i += EVENT_SIZE + event->len;
- }
- /*removing the “/tmp” directory from the watch list.*/
- inotify_rm_watch( fd, wd );
- /*closing the INOTIFY instance*/
- close( fd );
- }
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