[Overview][Constants][Types][Procedures and functions][Index] Reference for unit 'ipc' (#rtl)


Create token from filename


Source position: ipc.pp line 208

function ftok(

  Path: PChar;

  ID: cint



ftok returns a key that can be used in a semgetshmget or msgget call to access a new or existing IPC resource.

Path is the name of a file in the file system, ID is a character of your choice. The ftok call does the same as it's C counterpart, so a pascal program and a C program will access the same resource if they use the same Path and ID

For an example, see msgctl, semctl or shmctl.


ftok returns -1 if the file in Path doesn't exist.

See also



Return the ID of a semaphore set, possibly creating the set



Return the ID of a shared memory block, possibly creating it



Return message queue ID, possibly creating the queue

Documentation generated on: May 14 2021