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| .TH SEM_UNLINK 3 2021-03-22 "Linux" "Linux Programmer's Manual" |
| .SH NAME |
| sem_unlink \- remove a named semaphore |
| .SH SYNOPSIS |
| .nf |
| .B #include <semaphore.h> |
| .PP |
| .BI "int sem_unlink(const char *" name ); |
| .fi |
| .PP |
| Link with \fI\-pthread\fP. |
| .SH DESCRIPTION |
| .BR sem_unlink () |
| removes the named semaphore referred to by |
| .IR name . |
| The semaphore name is removed immediately. |
| The semaphore is destroyed once all other processes that have |
| the semaphore open close it. |
| .SH RETURN VALUE |
| On success |
| .BR sem_unlink () |
| returns 0; on error, \-1 is returned, with |
| .I errno |
| set to indicate the error. |
| .SH ERRORS |
| .TP |
| .B EACCES |
| The caller does not have permission to unlink this semaphore. |
| .TP |
| .B ENAMETOOLONG |
| .I name |
| was too long. |
| .TP |
| .B ENOENT |
| There is no semaphore with the given |
| .IR name . |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR sem_unlink () |
| T} Thread safety MT-Safe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008. |
| .SH SEE ALSO |
| .BR sem_getvalue (3), |
| .BR sem_open (3), |
| .BR sem_post (3), |
| .BR sem_wait (3), |
| .BR sem_overview (7) |
