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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 |
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12 | .\" permission notice identical to this one. | |
c13182ef | 13 | .\" |
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14 | .\" Since the Linux kernel and libraries are constantly changing, this |
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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) |