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 3.22 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/.