| sem_open.3 (109297) | sem_open.3 (111447) |
|---|---|
| 1.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 11 unchanged lines hidden (view full) --- 20.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" | 1.\" Copyright (C) 2000 Jason Evans <jasone@FreeBSD.org>. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice(s), this list of conditions and the following disclaimer as --- 11 unchanged lines hidden (view full) --- 20.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 23.\" BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24.\" WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE 25.\" OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 26.\" EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27.\" |
| 28.\" $FreeBSD: head/lib/libc/gen/sem_open.3 109297 2003-01-15 09:48:15Z tjr $ | 28.\" $FreeBSD: head/lib/libc/gen/sem_open.3 111447 2003-02-24 22:53:26Z ru $ |
| 29.Dd January 15, 2003 30.Dt SEM_OPEN 3 31.Os 32.Sh NAME 33.Nm sem_open , 34.Nm sem_close , 35.Nm sem_unlink 36.Nd named semaphore operations --- 86 unchanged lines hidden (view full) --- 123If the semaphore cannot be opened, 124.Fn sem_open 125returns 126.Dv SEM_FAILED 127and the global variable 128.Va errno 129is set to indicate the error. 130.Pp | 29.Dd January 15, 2003 30.Dt SEM_OPEN 3 31.Os 32.Sh NAME 33.Nm sem_open , 34.Nm sem_close , 35.Nm sem_unlink 36.Nd named semaphore operations --- 86 unchanged lines hidden (view full) --- 123If the semaphore cannot be opened, 124.Fn sem_open 125returns 126.Dv SEM_FAILED 127and the global variable 128.Va errno 129is set to indicate the error. 130.Pp |
| 131.Rv -std sem_close 132.Pp 133.Rv -std sem_unlink | 131.Rv -std sem_close sem_unlink |
| 134.Sh ERRORS 135The 136.Fn sem_open 137function will fail if: 138.Bl -tag -width Er 139.It Bq Er EACCES 140The semaphore exists and the permissions specified by 141.Fa oflag --- 57 unchanged lines hidden (view full) --- 199The named semaphore does not exist. 200.El 201.Sh SEE ALSO 202.Xr close 2 , 203.Xr open 2 , 204.Xr umask 2 , 205.Xr unlink 2 , 206.Xr sem_getvalue 3 , | 132.Sh ERRORS 133The 134.Fn sem_open 135function will fail if: 136.Bl -tag -width Er 137.It Bq Er EACCES 138The semaphore exists and the permissions specified by 139.Fa oflag --- 57 unchanged lines hidden (view full) --- 197The named semaphore does not exist. 198.El 199.Sh SEE ALSO 200.Xr close 2 , 201.Xr open 2 , 202.Xr umask 2 , 203.Xr unlink 2 , 204.Xr sem_getvalue 3 , |
| 207.Xr sem_wait 3 , 208.Xr sem_trywait 3 , | |
| 209.Xr sem_post 3 , | 205.Xr sem_post 3 , |
| 206.Xr sem_trywait 3 , 207.Xr sem_wait 3 , |
|
| 210.Xr sem 4 211.Sh STANDARDS 212The 213.Fn sem_open , 214.Fn sem_close , 215and 216.Fn sem_unlink 217functions conform to 218.St -p1003.1-96 . 219.Sh HISTORY 220Support for named semaphores first appeared in 221.Fx 5.0 . 222.Sh BUGS 223This implementation places strict requirements on the value of 224.Fa name : 225it must begin with a slash 226.Pq Ql / , 227contain no other slash characters, | 208.Xr sem 4 209.Sh STANDARDS 210The 211.Fn sem_open , 212.Fn sem_close , 213and 214.Fn sem_unlink 215functions conform to 216.St -p1003.1-96 . 217.Sh HISTORY 218Support for named semaphores first appeared in 219.Fx 5.0 . 220.Sh BUGS 221This implementation places strict requirements on the value of 222.Fa name : 223it must begin with a slash 224.Pq Ql / , 225contain no other slash characters, |
| 228and be less than 14 characters in length not including the terminating null. | 226and be less than 14 characters in length 227not including the terminating null character. |