SHM_UNLINK(3C) Standard C Library Functions SHM_UNLINK(3C)

NAME

shm_unlink - remove a shared memory object

SYNOPSIS

#include <sys/mman.h>

int shm_unlink(const char *name);

DESCRIPTION

The shm_unlink() function 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 is
removed before shm_unlink() returns, but the removal of the memory object
contents will be postponed until all open and mapped references to the
shared memory object have been removed.

RETURN VALUES

Upon successful completion, shm_unlink() returns 0. Otherwise it returns
-1 and sets errno to indicate the error condition, and the named shared
memory object is not affected by this function call.

ERRORS

The shm_unlink() function will fail if:

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


ENAMETOOLONG
The length of the name string exceeds PATH_MAX, or a
pathname component is longer than NAME_MAX while
_POSIX_NO_TRUNC is in effect.


ENOENT
The named shared memory object does not exist.


ENOSYS
The shm_unlink() function is not supported by the
system.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | MT-Safe |
+--------------------+-------------------+
|Standard | See standards(7). |
+--------------------+-------------------+

SEE ALSO

close(2), mmap(2), mlock(3C), shm_open(3C), attributes(7), standards(7)

NOTES

Solaris 2.6 was the first release to support the Asynchronous Input and
Output option. Prior to this release, this function always returned -1
and set errno to ENOSYS.


February 5, 2008 SHM_UNLINK(3C)