projects / thirdparty / man-pages.git / blame
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| 2c731798 | 1 | '\" t |
| c11b1abf | 2 | .\" Copyright (C) 2006 Michael Kerrisk <mtk.manpages@gmail.com> |
| 2c731798 | 3 | .\" |
| 93015253 | 4 | .\" %%%LICENSE_START(VERBATIM) |
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5 | .\" Permission is granted to make and distribute verbatim copies of this |
| 6 | .\" manual provided the copyright notice and this permission notice are | |
| 7 | .\" preserved on all copies. | |
| 8 | .\" | |
| 9 | .\" Permission is granted to copy and distribute modified versions of this | |
| 10 | .\" manual under the conditions for verbatim copying, provided that the | |
| 11 | .\" entire resulting derived work is distributed under the terms of a | |
| 12 | .\" permission notice identical to this one. | |
| c13182ef | 13 | .\" |
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14 | .\" Since the Linux kernel and libraries are constantly changing, this |
| 15 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 16 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 10d76543 MK |
17 | .\" the use of the information contained herein. The author(s) may not |
| 18 | .\" have taken the same level of care in the production of this manual, | |
| 19 | .\" which is licensed free of charge, as they might when working | |
| 20 | .\" professionally. | |
| c13182ef | 21 | .\" |
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22 | .\" Formatted or processed versions of this manual, if unaccompanied by |
| 23 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 4b72fb64 | 24 | .\" %%%LICENSE_END |
| 2c731798 | 25 | .\" |
| 4b8c67d9 | 26 | .TH SEM_CLOSE 3 2017-09-15 "Linux" "Linux Programmer's Manual" |
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27 | .SH NAME |
| 28 | sem_close \- close a named semaphore | |
| 29 | .SH SYNOPSIS | |
| 30 | .nf | |
| 31 | .B #include <semaphore.h> | |
| 68e4db0a | 32 | .PP |
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33 | .BI "int sem_close(sem_t *" sem ); |
| 34 | .fi | |
| 68e4db0a | 35 | .PP |
| 2c5f8c8c | 36 | Link with \fI\-pthread\fP. |
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37 | .SH DESCRIPTION |
| 38 | .BR sem_close () | |
| 39 | closes the named semaphore referred to by | |
| 40 | .IR sem , | |
| c13182ef | 41 | allowing any resources that the system has allocated to |
| 011ed91c | 42 | the calling process for this semaphore to be freed. |
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43 | .SH RETURN VALUE |
| 44 | On success | |
| 45 | .BR sem_close () | |
| 46 | returns 0; on error, \-1 is returned, with | |
| c13182ef | 47 | .I errno |
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48 | set to indicate the error. |
| 49 | .SH ERRORS | |
| 50 | .TP | |
| 51 | .B EINVAL | |
| 52 | .I sem | |
| 53 | is not a valid semaphore. | |
| 011b5251 ZL |
54 | .SH ATTRIBUTES |
| 55 | For an explanation of the terms used in this section, see | |
| 56 | .BR attributes (7). | |
| 57 | .TS | |
| 58 | allbox; | |
| 59 | lb lb lb | |
| 60 | l l l. | |
| 61 | Interface Attribute Value | |
| 62 | T{ | |
| 63 | .BR sem_close () | |
| 64 | T} Thread safety MT-Safe | |
| 65 | .TE | |
| 847e0d88 | 66 | .sp 1 |
| 2c731798 | 67 | .SH CONFORMING TO |
| 84295a7c | 68 | POSIX.1-2001, POSIX.1-2008. |
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69 | .SH NOTES |
| 70 | All open named semaphores are automatically closed on process | |
| 71 | termination, or upon | |
| 72 | .BR execve (2). | |
| 47297adb | 73 | .SH SEE ALSO |
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74 | .BR sem_getvalue (3), |
| 75 | .BR sem_open (3), | |
| 76 | .BR sem_post (3), | |
| 77 | .BR sem_unlink (3), | |
| 78 | .BR sem_wait (3), | |
| 79 | .BR sem_overview (7) |