unix IPC
i would like to know the method of usage of semaphores on shared memory segments the topic seems very difficult to understand mainly when difrent proceses communicate instantly and how do i avaoid deadlock situation (2 Replies)
Hi,
I am opening a file......then i am wrting some data into it......and i am reopening the file again but ......i get a error cannot open file.......
$::file= "\adder\testfile.txt"
open(TEST1,$::file);
some write operation
close(TEST1)
open(TEST1,$::file) 'I GET A ERROR CAN OPEN... (2 Replies)
hi
i m writin a program in which i keep track of all the child processes the program has generated and if a child process has an abnormal termination i need to do certain task related to that child process.
for handlin child process i used waitpid:
temp_cpid=waitpid(-1,&stat,WUNTRACED);
... (4 Replies)
Hi,
I am thinking about writing a log daemon for a multi-processed ksh application (yes - I know that high-level language would be a better option).
My question is as follows:
If many processes (many scripts) will try writing to a single log file:
print "message" > common.log
Will it work or... (2 Replies)
For a program I am designing, which involves handling the keyboard input Ctrl^c (SIGINT), it is taking ages for the program to actually recognise and perform the corresponding action whenever I run it and hit Ctrl^C at the CL. I have to do at least 3 Ctrl^Cs before the program will actually... (3 Replies)
i want to write a C chat program that communicates over IPC(inter process communication), that could be run using 2 seperate terminal windows within the same computer. so that wat u type in one terminal window , should appear on the other and vice versa...
could some one please help me with the... (2 Replies)
i wrote handler for sigsegv such that i can allocate memory for a variable to which
sigsegv generated for illlegal acces of memory.
my code is
#include <signal.h>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
char *j;
void segv_handler(int dummy)
{
j=(char *)malloc(10);
... (4 Replies)
I need help!Many Thanks!
Now,I try to manage the shared memory inter-process .
Inevitably,I have to deal with the synchronous.
I know the pthread_rwlock in posix,and I compile ,then run successfully in Red Hat Enterprise 4.
I have a doubt about whether the Posix supports the system such as... (1 Reply)
In solaris, orphan process is put to sleep mode and does not consume any CPU resources. In Linux, orphan process is kept in running state consuming all CPU and Ram resources. Is it the case? Is there a difference on how these operating systems will handle orphan processes?
The route cause of... (10 Replies)
Discussion started by: Belure Pooja B
10 Replies
LEARN ABOUT DEBIAN
ql-set-cmd-timeout
ql-set-cmd-timeout(8) System Administration ql-set-cmd-timeout(8)NAME
ql-set-cmd-timeout - set the timeout on the devices connected to the QLogic FC HBA.
SYNOPSIS
ql-set-cmd-timeout [OPTIONS]
DESCRIPTION
QLogic Linux Set Device Timeout Utility
This utility allows you to set the timeout on the devices connected to the QLogic FC HBA. This timeout value applies to the commands sent
to the device. This can help when target devices take longer to execute a command, for example under heavy I/O. Setting a longer timeout
reduces the chance of the Linux SCSI mid-layer driver aborting the tasks after a timeout.
[DEFAULT]
Display timeout of devices connected to all HOSTs
[HOST]
Display timeout of devices connected to HOST
[HOST] [TARGET]
Display timeout of devices connected to a TARGET on HOST
[HOST] [TARGET] [TIMEOUT]
To set timeout on devices connected to a TARGET on HOST
-h, --help, ?
Prints this help message
-i, --interactive
Use this option to use the menu driven program
SEE ALSO ql-dynamic-tgt-lun-disc(8), ql-lun-state-online(8), ql-hba-snapshot(8)Matthias Schmitz <matthias@sigxcpu.org> August 2008 ql-set-cmd-timeout(8)