inotify 监控文件系统的活动

example code

#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];

fd = inotify_init();

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

wd = inotify_add_watch( fd, "/home/strike",
                         IN_MODIFY | IN_CREATE | IN_DELETE );
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_MODIFY ) {
        if ( event->mask & IN_ISDIR ) {
          printf( "The directory %s was modified.n", event->name );
        }
        else {
          printf( "The file %s was modified.n", event->name );
        }
      }
    }
    i += EVENT_SIZE + event->len;
}

( void ) inotify_rm_watch( fd, wd );
( void ) close( fd );

exit( 0 );
}


more introduction here :
使用 inotify 监控文件系统的活动









end