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)