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SEM_CLOSE

Section: Linux Programmer's Manual (3)
Updated: 2006-03-25
Index Return to Main Contents

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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 3.35 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://man7.org/linux/man-pages/.

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Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUE

ERRORS

CONFORMING TO

NOTES

SEE ALSO

COLOPHON

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