NAME


sem_close - close a named semaphore

SYNOPSIS


#include <semaphore.h>

int sem_close(sem_t *sem);

Link with -lrt or -pthread.

DESCRIPTION


sem_close() closes the named semaphore referred to by sem, allowing any resources that the system has allocated to the calling process for this semaphore to be freed.

RETURN VALUE


On success sem_close() returns 0; on error, -1 is returned, with errno set to indicate the error.

ERRORS


EINVAL sem is not a valid semaphore.

CONFORMING TO


POSIX.1-2001.

NOTES


All open named semaphores are automatically closed on process termination, or upon execve(2).

SEE ALSO


sem_getvalue(3), sem_open(3), sem_post(3), sem_unlink(3), sem_wait(3), sem_overview(7)

COLOPHON


This page is part of release 3.23 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.

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