9 More Discussions You Might Find Interesting
1. Programming
I have a problem understanding the different scheduling queues (Ready Queue, I/O Queue, Job Queue) Can you please explain/illustrate/differentiate these queues to me? Thanks a lot guys.;) (1 Reply)
Discussion started by: zel2zel
1 Replies
2. 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
3. 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
4. Programming
hi
I am using posix functions such as mq_open, mq_close and including the mqueue.h. but its giving a linking error,"undefined reference to mq_open and mq_close".
it it that we have to link some library or so while compiling... plzzz help
Thanxs
Mohit (0 Replies)
Discussion started by: mohit3884
0 Replies
5. 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
6. Programming
Hi all,
I've been trying for hours to figure out how to turn my 2-program (one to send and one to receive) "chat system" using message queues, into a single program where each concurrent component (entity) will both send and receive messages. PLEASE give me a hand with this, I'm starting to... (9 Replies)
Discussion started by: mgchato
9 Replies
7. Linux
RH 7.2
Are there any commands to check the print queue status? Something along the lines of AIX's "qchk"?
Thanks!! (2 Replies)
Discussion started by: jalburger
2 Replies
8. UNIX for Advanced & Expert Users
Hi,
I submit some processes throught an at queue with the cmd at -q queue.
I can easily check the waiting process with atq. But how can I check running processes within a specific queue ?
Thanks,
Stef (2 Replies)
Discussion started by: stef
2 Replies
9. UNIX for Dummies Questions & Answers
I have a print queue set up with the following options: remote, standard processing, Hostname=(A Windows 2000 Server), bsd print spooler. It takes about 1 minute to transfer a 100 kb file and it times out (downs the queue) on larger files. When tested on a different system at a different location... (2 Replies)
Discussion started by: Scottb7711
2 Replies
lpc(8) Easy Software Products 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]
Displays a short help message.
quit
Exits the command interpreter.
status [queue]
Displays the status of one or more printer or class queues.
? [command]
Display a short help message.
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 commands.
SEE ALSO
accept(8), cancel(1), disable(8), enable(8), lp(1), lpr(1), lprm(1), lpstat(1), reject(8), CUPS Software Administrators Manual,
http://localhost:631/documentation.html
COPYRIGHT
Copyright 1993-2002 by Easy Software Products, All Rights Reserved.
22 September 1999 Common UNIX Printing System lpc(8)
