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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 3.65 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/.



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