AT&T UNIX™PC Unix System V Users Manual - tenox
AT&T UNIX™PC Unix System V Users Manual - tenox AT&T UNIX™PC Unix System V Users Manual - tenox
MSGGET (2) MSGGET (2) SEE ALSO msgct1(2), msgop(2), stdipc(3C). - 2-
MSGOP (2) MSGOP (2) NAME msgop - message operations SYNOPSIS #include #include #include int msgsnd (msqid, msgp, msgsz, msgflg) int msqid; struct msgbuf •msgp; int msgsz, msgflg; int msgrev (msqid, msgp, msgsz, msgtyp, msgflg) int msqid; struct msgbur •msgp; int msgsz; long rnsgtyp; int msgflg; DESCRIPTION Msgsnd is used to send a message to the queue associated with the message queue identifier specified by msqid . {WRITE} Msgp points to a structure containing the message. This structure is composed of the following members: long mtype; I* message type *I char mtext[]; I* message text *I Mtype is a positive integer that can be used by the receiving process for message selection (see msgrcv below). Mtext is any text of length msgsz bytes. Msgsz can range from 0 to a system imposed maximum. Msgflg specifies the action to be taken if one or more of the following are true: The number of bytes already on the queue is equal to msg_qbytes (see intro(2)). The total number of messages on all queues system wide is equal to the system imposed limit. These actions are as follows: If (msgflg & IPC_NOWAIT) is "true", the message will not be sent and the calling process will return immediately. If (msgflg & IPC_NOWAIT) is "false", the calling process will suspend execution until one of the following occurs: The condition responsible for the suspension no longer exists, in which case the message is sent. Msqid is removed from the system (see msgctl(2)). When this occurs, errno is set equal to EIDRM, and a value of -1 is returned. The calling process receives a signal that is to be caught. In this case the message is not sent and - 1 -
- Page 661 and 662: ALARM (2) ALARM (2) NAME alarm - se
- Page 663: BRK(2) BRK ( 2 ) NAME brk, sbrk - c
- Page 667 and 668: CHMOD (2) CHMOD (2) NAME chmod - ch
- Page 669: CHOWN(2) CHOWN(2) NAME chown - chan
- Page 673 and 674: CLOSE ( 2) CLOSE (2) NAME close - c
- Page 675 and 676: CREAT ( 2 ) CREAT ( 2 ) NAME creat
- Page 677 and 678: DUP (2) DUP (2) NAME dup - duplicat
- Page 679 and 680: EXEC (2) EXEC (2) NAME execl, execv
- Page 681: EXEC (2) EXEC (2) Search perm1ss10n
- Page 684 and 685: EXIT (2) EXIT (2) WARNING See WARNI
- Page 686 and 687: FCNTL (2) FCNTL (2) immediately wit
- Page 689 and 690: FORK(2) FORK(2) NAME fork - create
- Page 691: GETPID ( 2} GETPID (2) NAME getpid,
- Page 694 and 695: I I I I I I I I I I I I I I I I I I
- Page 696 and 697: �-
- Page 699: LINK ( 2 ) LINK ( 2 ) NAME link - l
- Page 703 and 704: MKNOD (2) MKNOD (2) NAME mknod - ma
- Page 705: MOUNT (2) MOUNT (2) NAME mount - mo
- Page 708 and 709: MSGCTL(2) MSGCTL ( 2 ) user ID of t
- Page 712 and 713: MSGOP ( 2) MSGOP (2) the calling pr
- Page 714 and 715: If)
- Page 717 and 718: OPEN ( 2 ) OPEN ( 2 ) NAME open - o
- Page 719: OPEN(2) OPEN(2) O_NDELAY is set, th
- Page 722 and 723: I�
- Page 725 and 726: PLOCK(2) PLOCK(2) NAME plock - lock
- Page 727: PROFIL ( 2 ) PROFIL ( 2 ) NAME prof
- Page 730 and 731: PTRACE (2) PTRACE (2) 4, 5 With the
- Page 732 and 733: (� �--- .
- Page 735 and 736: SEMCTL ( 2 ) SEMCTL ( 2 ) NAME semc
- Page 737 and 738: SEMGET (2) SEMGET (2) NAME semget -
- Page 739 and 740: SEMOP ( 2) SEMOP {2) NAME semop - s
- Page 741 and 742: SEMOP (2) SEMOP (2) Operation permi
- Page 743: SETPGRP (2) SETPGRP (2) NAME setpgr
- Page 747 and 748: SHMCTL (2) SHMCTL (2) NAME shmctl -
- Page 749 and 750: � ! SHMGET (2) SHMGET (2) NAME sh
- Page 751 and 752: SHMOP ( 2 ) SHMOP ( 2 ) NAME shmop
- Page 753 and 754: SIGNAL (2) SIGNAL (2) NAME signal -
- Page 755 and 756: SIGNAL (2) SIGNAL (2) Sig is an ill
- Page 757 and 758: STAT ( 2 ) STAT ( 2 ) NAME stat, fs
- Page 759 and 760: STIME(2) STIME(2) NAME stime - set
MSGGET (2) MSGGET (2)<br />
SEE ALSO<br />
msgct1(2), msgop(2), stdipc(3C).<br />
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