shm_unlink(2) [osx man page]

SHM_UNLINK(2)						      BSD System Calls Manual						     SHM_UNLINK(2)

NAME

     shm_unlink -- remove shared memory object

SYNOPSIS

     #include <sys/mman.h>

     int
     shm_unlink(const char *name);

DESCRIPTION

     The shm_unlink() function disassociates the shared memory object specified by name from that name.  The resources associated with the shared
     memory object remain intact until the last file descriptor reference is removed, e.g., by close(2) or munmap(2), at which point the resources
     are reclaimed (if no references exist at the time of the call to shm_unlink(), the resources are reclaimed immediately).  The name can only
     be reused when it is bound to a new shared memory object with a call to shm_open(2) with the O_CREAT flag.

RETURN VALUES

     Upon successful completion, a value of 0 is returned.  Otherwise, a value of -1 is returned and errno is set to indicate the error, and the
     named shared memory object will remain unchanged.

ERRORS

     The shm_unlink() succeeds unless:

     [EACCES]		Permission is denied to be remove the object.

     [ENAMETOOLONG]	name exceeded the name size limit.  This is currently PSHMNAMLEN characters (defined in <sys/posix_shm.h>), but this may
			change in the future.

     [ENOENT]		The named object does not exist.

SEE ALSO

     close(2), mmap(2), munmap(2), shm_open(2), shmat(2), shmctl(2)

HISTORY

     shm_open() is specified in the POSIX Realtime Extension (1003.1b-1993/1003.1i-1995).

Darwin								  August 31, 2006							    Darwin

Check Out this Related Man Page

shm_unlink(2)							System Calls Manual						     shm_unlink(2)

NAME

       shm_unlink - unlink a shared memory object

SYNOPSIS

DESCRIPTION

       The  system  call  removes  the	name of the shared memory object named by the string pointed to by name.  If one or more references to the
       shared memory object exists when the object is unlinked, the name will be removed before returns, but the removal of the memory object con-
       tents will be postponed until all open and map references to the shared memory object have been removed.

RETURN VALUE

       returns the following values:

	      Successful completion.

	      Failure,
		   is set to indicate the error.

ERRORS

       If fails, is set to one of the following values:

	      [EACCES]	     Permission to unlink the named shared memory object is denied.

	      [ENAMETOOLONG] The  length of the name string exceeds or the length of a (pathname) component of the name string exceeds while is in
			     effect.

	      [ENOENT]	     The named shared memory object does not exist.

	      [ENOSYS]	     is not supported by the implementation.

SEE ALSO

       shm_open(2), close(2), mmap(2), munmap(2), privileges(5).

STANDARDS CONFORMANCE

																     shm_unlink(2)

Linux and UNIX Man Pages

shm_unlink(2) [osx man page]

Check Out this Related Man Page