libfsmonitor

##Overview##

libfsmonitor is an Objective-C library allows processes to be notified upon various filesystem events, such as files being created, modified, or deleted. The daemon (fsmonitord) trails /dev/fsevents and parses the data into an NSDictionary, which is then sent via CPDistributedNotificationCenter to any interested clients. Included is a small wrapper around CPDistributedNotificationCenter which handles listening and directory filtering.

Usage

Classes wishing to receive filesystem notification events must conform to the FSMonitorDelegate protocol.

Initialization

FSMonitor *filesystemMonitor = [FSMonitor new];
filesystemMonitor.delegate = self;

[filesystemMonitor addDirectoryFilter:[NSURL URLWithString:@"/path/to/monitor/"]];

Delegate Method

- (void)monitor:(FSMonitor*)monitor recievedEventInfo:(NSDictionary*)info{
    FSMonitorEventType type = [[info objectForKey:@"TYPE"] intValue];
    switch(type){
        case FSMonitorEventTypeRename:
        {
            NSString *originalName = [[info objectForKey:@"FILE"] path];
            NSString *newName = [[info objectForKey:@"DEST_FILE"] path];
            break;
        }
        case FSMonitorEventTypeDeletion:
            ...

Event Info

The info dictionary contains information about the event. All events include the following keys and their corresponding values:

• FILE
• The path of the file or directory involved with the event.
• DEVICE_MAJOR
• The major value of the physical drive FILE is located on.
• DEVICE_MINOR
• The minor value of the physical drive FILE is located on.
• INODE
• Whatever the hell an inode is.
• MODE
• The read/write/execute protections on FILE.
• UID
• The UID of the process that caused the event.
• GID
• The GID of the process that caused the event.

The only exception is FSMonitorEventTypeRename, which contains one extra value:

• DEST_FILE
• The path of the new file.