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 -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 3.74 of the Linux man-pages project.  A  description  of  the
       project,  information  about  reporting  bugs, and the latest version of this page, can be
       found at http://www.kernel.org/doc/man-pages/.



Linux                                       2012-05-13                               SEM_CLOSE(3)