|SEM_UNLINK(3C)||Standard C Library Functions||SEM_UNLINK(3C)|
sem_unlink - remove a named semaphore
#include <semaphore.h> int sem_unlink(const char *name);
The sem_unlink() function removes the semaphore named by the string name. If the semaphore named by name is currently referenced by other processes, then sem_unlink() has no effect on the state of the semaphore. If one or more processes have the semaphore open when sem_unlink() is called, destruction of the semaphore is postponed until all references to the semaphore have been destroyed by calls to sem_close(3C), _Exit(2), or one of the exec functions (see exec(2)) . Calls to sem_open(3C) to re-create or re-connect to the semaphore refer to a new semaphore after sem_unlink() is called. The sem_unlink() call does not block until all references have been destroyed; it returns immediately.
Upon successful completion, sem_unlink() returns 0. Otherwise, the semaphore is not changed and the function returns a value of −1 and sets errno to indicate the error.
The sem_unlink() function will fail if:
See attributes(7) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
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||OmniOS|