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05-13-2005
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10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
let 3 processes a, b and c are sharing msgs using msg queues.process 'a' sending msg to 'c' and in turn 'c' send sthat msg to 'b'.if something happens to c how can 'a' and 'b' know that 'c' is not available?????? (2 Replies)
Discussion started by: sukaam
2 Replies
2. Solaris
We have message queues created from our ERP system to our tax system via an application api written by the ERP software vendor.
Occasionally when a user does not gracefully exit the ERP application, the message queue hangs. After a few months, this becomes a problem as the queues are all used... (2 Replies)
Discussion started by: MizzGail
2 Replies
3. Linux
how to check the maximun number of message queues in current linux enviornment? is there any command ? (4 Replies)
Discussion started by: princelinux
4 Replies
4. Programming
Hi,
According to my understanding..
When message queues are used, when a process post a message in the queue and if another process reads it from the queue then the queue will be empty unlike shared memory where n number of processess can access the shared memory and still the contents remain... (2 Replies)
Discussion started by: rvan
2 Replies
5. UNIX for Advanced & Expert Users
If I use sockets for IPC, and can easily distribute my applications.
UNIX Message Queues are local to the processor.
As I understand it, Message Queues still incur system call overhead, just like socket calls.
What advantage does a UNIX Message Queue provide versus a TCP or UDP Socket,... (2 Replies)
Discussion started by: zen29sky
2 Replies
6. UNIX for Advanced & Expert Users
#include <sys/ipc.h>
#include <sys/msg.h>
int main()
{
int qid;
int t;
struct msgbuf mesg;
qid=msgget(IPC_PRIVATE,IPC_CREAT);
mesg.mtype=1L;
mesg.mtext=1;
t=msgsnd(qid,&mesg,1,0);
printf("%d",t);
}
the program prints -1 as the result of msgsnd ,which means that msgsnd doesn't... (1 Reply)
Discussion started by: tolkki
1 Replies
7. UNIX for Dummies Questions & Answers
can any body provide a tutorial that explains the concept of message queues in UNIX in great detail (1 Reply)
Discussion started by: asalman.qazi
1 Replies
8. Programming
Hi,
I have searched the forums and could not find a relavant thread discussing my use case, hence the new post.
Basically am trying to pass on work to dummy worker instances from controller which will pass on work to workers (client)
To make use of host capacity, am planning to serialize... (2 Replies)
Discussion started by: matrixmadhan
2 Replies
9. Shell Programming and Scripting
i have an application installed on AIX 5.3 and i have made a script that shutdown a proccesses that exceeded 10000kb of memory usage but i have a problem with cleaning the message queues of these proccesses after shutting them down. Is there any way to clean the message queues for this particular... (8 Replies)
Discussion started by: Portabello
8 Replies
10. UNIX for Advanced & Expert Users
i have a program(C++ Code) that sends/receives information through queue's (Uses MQ)
Is there any UNIX/LINUX tool that calculates the load and performance time for the same.
If not how do i design the program that calculates the performance time.
i know that time.h can be used but it gives... (2 Replies)
Discussion started by: vkca
2 Replies
LEARN ABOUT DEBIAN
lpc
lpc(8) Apple Inc. lpc(8) NAME
lpc - line printer control program SYNOPSIS
lpc [ command [ parameter(s) ] ] DESCRIPTION
lpc provides limited control over printer and class queues provided by CUPS. It can also be used to query the state of queues. If no command is specified on the command-line, lpc will display a prompt and accept commands from the standard input. COMMANDS
The lpc program accepts a subset of commands accepted by the Berkeley lpc program of the same name: exit Exits the command interpreter. help [command] ? [command] Displays a short help message. quit Exits the command interpreter. status [queue] Displays the status of one or more printer or class queues. LIMITATIONS
Since lpc is geared towards the Berkeley printing system, it is impossible to use lpc to configure printer or class queues provided by CUPS. To configure printer or class queues you must use the lpadmin(8) command or another CUPS-compatible client with that functionality. COMPATIBILITY
The CUPS version of lpc does not implement all of the standard Berkeley or LPRng commands. SEE ALSO
cancel(1), cupsaccept(8), cupsenable(8), lp(1), lpr(1), lprm(1), lpstat(1), http://localhost:631/help COPYRIGHT
Copyright 2007-2011 by Apple Inc. 3 November 2008 CUPS lpc(8)