Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

How do I run a shell command in a while loop?

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How do I run a shell command in a while loop?
# 1  
Old 12-05-2011
How do I run a shell command in a while loop?
The command is:

Code:
sic -h irc.freenode.net 2>&1 | tee -a irc.log

Where sic is an IRC client, and I'm piping the output to tee in order to log my IRC sessions.

I'm trying to handle reconnects by running it in a while loop in the shell process and cat the initial commands into sic's stdin.

I would think to approach this by using a fifo (using the mkfifo(1) command) to redirect sic's stdin, but I'm not sure if there's a more elegant way to reconnect on ping timeouts, kills, servers going down, and just disconnects in general.

How do you suggest I go about doing this?

(I'm using OpenBSD's ksh if that matters.)
# 2  
Old 12-05-2011
Take a look at expect and ksh coprocesses (examples here).
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Run a shell script in a loop with max number of threads

hi guys. i have a question for you i have a one file and inside this file there are 1000 lines and each line is a linux command running this commands takes long time so i want to create one bash script and run this lines in a loop with max number of threads for example i want to run... (2 Replies)
Discussion started by: avtaritet
2 Replies

2. Shell Programming and Scripting

How to use a loop for multiple files in a folder to run awk command?

Dear folks I have two data set which there names are "final.map" and "1.geno" and look like this structures: final.map: gi|358485511|ref|NC_006088.3| 2044 gi|358485511|ref|NC_006088.3| 2048 gi|358485511|ref|NC_006088.3| 2187 gi|358485511|ref|NC_006088.3| 17654 ... (2 Replies)
Discussion started by: sajmar
2 Replies

3. Shell Programming and Scripting

Script for telnet and run one command kill it and run another command using while loop

( sleep 3 echo ${LOGIN} sleep 2 echo ${PSWD} sleep 2 while read line do echo "$line" PID=$? sleep 2 kill -9 $PID done < temp sleep 5 echo "exit" ) | telnet ${HOST} while is executing only command and exits. (5 Replies)
Discussion started by: sooda
5 Replies

4. UNIX Desktop Questions & Answers

command to run another shell on top of your default shell?

Can someone point me to the right command to to run another shell on top of your default shell? Thanks PS If admin sees this It is not home work. I am old man who wants to learn unix in my spare time. I CURRENTLY DO NOT GO SCHOOL, COLLEGE OR UNIVERSITY. (2 Replies)
Discussion started by: Bill Thompson
2 Replies

5. Shell Programming and Scripting

run command in a script shell

Hello, Please i'd like to run command in a script shell , how can i do ? here my commands : cd blcr-build // run command in this rep sudo insmod ./blcr_imports/kbuild/blcr_imports.ko //root sudo insmod ./cr_module/kbuild/blcr.ko //root Thank you. (1 Reply)
Discussion started by: chercheur857
1 Replies

6. Shell Programming and Scripting

Run DB2 export command in loop

Hi All, I have list of 100 table names in a file, how to read table name from and pass to DB2 export command and run for all tables in loop. Please help me with script. db2 EXPORT TO ~/data_export/<table name from file>.ixf OF IXF MESSAGES messages.txt "SELECT * FROM ITG.<Table Name... (4 Replies)
Discussion started by: srimitta
4 Replies

7. Shell Programming and Scripting

Execute a shell script after a particular command is run

Hi, I need to run a script whenever the Cron file is modified. The requirement is whenever a user modifies the cron file, the script should run automatically. Can you please provide your inputs ? (5 Replies)
Discussion started by: harneet2004us
5 Replies

8. Shell Programming and Scripting

Run a command in a special shell

Hi there, Imagine we have to run a command in python shell from a perl script. 1 #!/usr/bin/perl 2 use strict; 3 my @con; 4 @con = `python`; 5 #?????print `print 'salaam'`;???? What's suitable situation for fifth line? Thanks in advance. (4 Replies)
Discussion started by: Zaxon
4 Replies

9. Shell Programming and Scripting

Run a command on new created shell

Hi I am using a command "script" to capture the output of a command my script is #/bin/sh script filename.txt ./execute_some_script.sh exit exit Now my problem is that when my script run "script filename.txt" its fork a new shell and after the no other command execute The remaining... (2 Replies)
Discussion started by: sushantnirwan
2 Replies

10. UNIX for Dummies Questions & Answers

how to run a shell command from C program?

Hi mates, i am trying to use the C execvp command to run a shell program like this: ..... char input ; printf("enter your command"); scanf("%ds",input) execvp input .... Compilation is ok but when i run it raise the error : Segmentation Error ... your help will be appreciated. ... (1 Reply)
Discussion started by: abdul
1 Replies
Login or Register to Ask a Question