| msgrcv.2 (50476) | msgrcv.2 (57686) |
|---|---|
| 1.\" $NetBSD: msgrcv.2,v 1.1 1995/10/16 23:49:20 jtc Exp $ 2.\" 3.\" Copyright (c) 1995 Frank van der Linden 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: --- 14 unchanged lines hidden (view full) --- 23.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 1.\" $NetBSD: msgrcv.2,v 1.1 1995/10/16 23:49:20 jtc Exp $ 2.\" 3.\" Copyright (c) 1995 Frank van der Linden 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: --- 14 unchanged lines hidden (view full) --- 23.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31.\" $FreeBSD: head/lib/libc/gen/msgrcv.3 50476 1999-08-28 00:22:10Z peter $ | 31.\" $FreeBSD: head/lib/libc/gen/msgrcv.3 57686 2000-03-02 09:14:21Z sheldonh $ |
| 32.\" 33.\"/ 34.Dd November 24, 1997 35.Dt MSGRCV 3 36.Os FreeBSD 37.Sh NAME 38.Nm msgrcv 39.Nd receive a message from a message queue --- 38 unchanged lines hidden (view full) --- 78.Fa msgtyp 79is less than 0. The first message of the lowest message type that is 80less than or equal to the absolute value of 81.Fa msgtyp 82will be received. 83.El 84.Pp 85.Fa msgsz | 32.\" 33.\"/ 34.Dd November 24, 1997 35.Dt MSGRCV 3 36.Os FreeBSD 37.Sh NAME 38.Nm msgrcv 39.Nd receive a message from a message queue --- 38 unchanged lines hidden (view full) --- 78.Fa msgtyp 79is less than 0. The first message of the lowest message type that is 80less than or equal to the absolute value of 81.Fa msgtyp 82will be received. 83.El 84.Pp 85.Fa msgsz |
| 86specifies the maximum length of the requested message. If the received | 86specifies the maximum length of the requested message. 87If the received |
| 87message has a length greater than 88.Fa msgsz 89it will be silently truncated if the 90.Dv MSG_NOERROR 91flag is set in 92.Fa msgflg , 93otherwise an error will be returned. 94.Pp 95If no matching message is present on the message queue specified by 96.Fa msqid , 97the behavior of 98.Fn msgrcv 99depends on whether the 100.Dv IPC_NOWAIT 101flag is set in 102.Fa msgflg | 88message has a length greater than 89.Fa msgsz 90it will be silently truncated if the 91.Dv MSG_NOERROR 92flag is set in 93.Fa msgflg , 94otherwise an error will be returned. 95.Pp 96If no matching message is present on the message queue specified by 97.Fa msqid , 98the behavior of 99.Fn msgrcv 100depends on whether the 101.Dv IPC_NOWAIT 102flag is set in 103.Fa msgflg |
| 103or not. If | 104or not. 105If |
| 104.Dv IPC_NOWAIT 105is set, 106.Fn msgrcv 107will immediately return a value of -1, and set 108.Va errno 109to 110.Er EAGAIN . 111If --- 98 unchanged lines hidden --- | 106.Dv IPC_NOWAIT 107is set, 108.Fn msgrcv 109will immediately return a value of -1, and set 110.Va errno 111to 112.Er EAGAIN . 113If --- 98 unchanged lines hidden --- |