SEM_CLOSE(3)                                        Linux Programmer's Manual                                       SEM_CLOSE(3)



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 3.25 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/.



Linux                                                      2006-03-25                                               SEM_CLOSE(3)