| semget.2 (84306) | semget.2 (108028) |
|---|---|
| 1.\" 2.\" Copyright (c) 1995 David Hovemeyer <daveho@infocom.com> 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" | 1.\" 2.\" Copyright (c) 1995 David Hovemeyer <daveho@infocom.com> 3.\" 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 9 unchanged lines hidden (view full) --- 18.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" |
| 26.\" $FreeBSD: head/lib/libc/sys/semget.2 84306 2001-10-01 16:09:29Z ru $ | 26.\" $FreeBSD: head/lib/libc/sys/semget.2 108028 2002-12-18 09:22:32Z ru $ |
| 27.\" 28.Dd September 12, 1995 29.Dt SEMGET 2 30.Os 31.Sh NAME 32.Nm semget 33.Nd obtain a semaphore id 34.Sh LIBRARY --- 26 unchanged lines hidden (view full) --- 61.It 62An integer constant may be specified. If no IPC object corresponding 63to 64.Fa key 65is specified and the IPC_CREAT bit is set in 66.Fa flag , 67a new one will be created. 68.It | 27.\" 28.Dd September 12, 1995 29.Dt SEMGET 2 30.Os 31.Sh NAME 32.Nm semget 33.Nd obtain a semaphore id 34.Sh LIBRARY --- 26 unchanged lines hidden (view full) --- 61.It 62An integer constant may be specified. If no IPC object corresponding 63to 64.Fa key 65is specified and the IPC_CREAT bit is set in 66.Fa flag , 67a new one will be created. 68.It |
| 69.Fn ftok 70may be used to generate a key from a pathname. See 71.Xr ftok 3 . | 69The 70.Xr ftok 3 71function 72may be used to generate a key from a pathname. |
| 72.El 73.\" 74.\" Likewise for this section, except SHM_* becomes SEM_*. 75.\" 76.Pp 77The mode of a newly created IPC object is determined by 78.Em OR Ns 'ing 79the following constants into the --- 16 unchanged lines hidden (view full) --- 96.Pp 97If a new set of semaphores is being created, 98.Fa nsems 99is used to indicate the number of semaphores the set should contain. 100Otherwise, 101.Fa nsems 102may be specified as 0. 103.Sh RETURN VALUES | 73.El 74.\" 75.\" Likewise for this section, except SHM_* becomes SEM_*. 76.\" 77.Pp 78The mode of a newly created IPC object is determined by 79.Em OR Ns 'ing 80the following constants into the --- 16 unchanged lines hidden (view full) --- 97.Pp 98If a new set of semaphores is being created, 99.Fa nsems 100is used to indicate the number of semaphores the set should contain. 101Otherwise, 102.Fa nsems 103may be specified as 0. 104.Sh RETURN VALUES |
| 104.Fn Semget | 105The 106.Fn semget 107system call |
| 105returns the id of a semaphore set if successful; otherwise, -1 106is returned and 107.Va errno 108is set to indicate the error. 109.Sh ERRORS | 108returns the id of a semaphore set if successful; otherwise, -1 109is returned and 110.Va errno 111is set to indicate the error. 112.Sh ERRORS |
| 110.Fn Semget | 113The 114.Fn semget 115system call |
| 111will fail if: 112.Bl -tag -width Er 113.\" ipcperm could fail (we're opening to read and write, as it were) 114.It Bq Er EACCES 115Access permission failure. 116.\" 117.\" sysv_sem.c is quite explicit about these, so I'm pretty sure 118.\" this is accurate --- 23 unchanged lines hidden --- | 116will fail if: 117.Bl -tag -width Er 118.\" ipcperm could fail (we're opening to read and write, as it were) 119.It Bq Er EACCES 120Access permission failure. 121.\" 122.\" sysv_sem.c is quite explicit about these, so I'm pretty sure 123.\" this is accurate --- 23 unchanged lines hidden --- |