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NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | ATTRIBUTES | STANDARDS | HISTORY | SEE ALSO | COLOPHON |
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sem_unlink(3) Library Functions Manual sem_unlink(3)
sem_unlink - remove a named semaphore
POSIX threads library (libpthread, -lpthread)
#include <semaphore.h>
int sem_unlink(const char *name);
sem_unlink() removes the named semaphore referred to by name. The
semaphore name is removed immediately. The semaphore is destroyed
once all other processes that have the semaphore open close it.
On success sem_unlink() returns 0; on error, -1 is returned, with
errno set to indicate the error.
EACCES The caller does not have permission to unlink this
semaphore.
ENAMETOOLONG
name was too long.
ENOENT There is no semaphore with the given name.
For an explanation of the terms used in this section, see
attributes(7).
┌──────────────────────────────────────┬───────────────┬─────────┐
│ Interface │ Attribute │ Value │
├──────────────────────────────────────┼───────────────┼─────────┤
│ sem_unlink() │ Thread safety │ MT-Safe │
└──────────────────────────────────────┴───────────────┴─────────┘
POSIX.1-2008.
POSIX.1-2001.
sem_getvalue(3), sem_open(3), sem_post(3), sem_wait(3),
sem_overview(7)
This page is part of the man-pages (Linux kernel and C library
user-space interface documentation) project. Information about
the project can be found at
⟨https://www.kernel.org/doc/man-pages/⟩. If you have a bug report
for this manual page, see
⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
This page was obtained from the tarball man-pages-6.15.tar.gz
fetched from
⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
2025-08-11. If you discover any rendering problems in this HTML
version of the page, or you believe there is a better or more up-
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man-pages@man7.org
Linux man-pages 6.15 2025-05-17 sem_unlink(3)
Pages that refer to this page: ipcrm(1), sem_close(3), sem_open(3), sem_overview(7)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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