shm_unlink(3R) manual page
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shm_unlink - remove a shared memory object
cc [ flag ... ] file
... -lposix4 [ library ... ]
int shm_unlink(const char *name);
MT-Safe
shm_unlink() 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.
If successful, 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.
- 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
- shm_unlink() is not supported by this
implementation.
close(2)
, mmap(2)
, mlock(3C)
, shm_open(3R)
In
Solaris 2.5, these functions always return -1 and set errno
to ENOSYS,
because this release does not support the Shared Memory Objects option.
It is our intention to provide support for these interfaces in future releases.
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