inotifyt.c

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/inotify.h>

#define EVENT_SIZE ( sizeof (struct inotify_event ) )
#define BUF_LEN    ( 1024 * (EVENT_SIZE + 16 ) )

int main( int argc, char **argv)
{
  int length, i= 0;
  int fd;
  int wd;
  char buffer[BUF_LEN];
  FILE *output;
  char path[4096];

  fd = inotify_init();

  if ( fd < 0 ) {
    perror( "inotify_init" );
  }

  wd = inotify_add_watch( fd, "/home/adurvasu",IN_MODIFY | IN_CREATE | IN_DELETE | IN_OPEN);
  length = read( fd, buffer, BUF_LEN );

  if ( length < 0 ) {
    perror("read");
  }

  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("The directory %s was created.\n", event->name );
	}
	else {
	  printf("The file %s was created.\n", event->name );
	}
      }
      else if ( event->mask & IN_DELETE ) {
	if (event->mask & IN_ISDIR ) {
	  printf("The directory %s was deleted.\n", event->name );
	}
	else {
	  printf("The file %s was deleted.\n", event->name );
	}
      }
      else if (event->mask & IN_OPEN) {
	if (event->mask & IN_ISDIR ) {
	  printf("The directory %s was modified.\n", event->name);
	}
	else {
      	  //printf("The file %s was modified.\n", event->name );

	  output = popen ("cat /proc/$(lsof -t /home/adurvasu/a.txt)/cmdline", "r");
	  if (output == NULL) {
	    printf("Failed to run command\n" );
	    exit(1);
	  }
	  while (fgets(path, sizeof(path)-1, output) != NULL) {
	    printf("Command: %s \n", path);
	  }
	  pclose(output);
	}
      }
    }
    i += EVENT_SIZE + event->len;
  }
  ( void ) inotify_rm_watch( fd, wd);
  ( void ) close(fd);
  exit(0);
}