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February 5, 2020 06:26
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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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https://www.thegeekstuff.com/2010/04/inotify-c-program-example/