ftok man page on BSDi

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ftok(3)			    BSD Programmer's Manual		       ftok(3)

NAME
     ftok - create IPC identifier from path name

SYNOPSIS
     #include <sys/types.h>
     #include <sys/ipc.h>

     key_t
     ftok(const char *path, int id);

DESCRIPTION
     The ftok() function attempts to create a unique key suitable for use with
     the msgget(3),  semget(2) and shmget(2) functions given the path of an
     existing file and a user-selectable id.

     The specified path must specify an existing file that is accessible to
     the calling process or the call will fail.	 Also, note that links to
     files will return the same key, given the same id.

RETURN VALUES
     The ftok() function will fail and return -1 if path does not exist or if
     it cannot be accessed by the calling process.

SEE ALSO
     semget(2),	 shmget(2),  msgget(2)

4th Berkeley Distribution	 July 3, 1996				     1
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