ftok
Description
int ftok ( string pathname, string proj )
The function converts the pathname of an existing
accessible file and a project identifier (proj)
into a
integer for use with for example
shmop_open() and other System V IPC keys. The
proj parameter must be a one character string.
On success the return value will be the created key value, otherwise -1 is returned.
See also shmop_open() and sem_get().
