trusty (3) sem_close.3.gz

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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 3.54 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/.