Sponsored Content
Top Forums Shell Programming and Scripting how to exit a while true loop Post 302133732 by Noob e on Saturday 25th of August 2007 04:08:48 AM
Old 08-25-2007
how to exit a while true loop

Hi guys,

I'm new to unix but loving it!! BUT this is driving me nuts as i can't work out the best way to do it.

I have a while true loop that i use to monitor something. For my own reasons in ths script i have disabled the CTRL C using the trap command. But i want to put in a option to exit the script using the exit command.

So i get it to display the info for say 30 seconds then it loops, then displays the new info. While it is waiting for 30 seconds i want the option to exit the script by pressing say the x key. As im new to unix not sure how to do this, i either work in ksh or bash. Pleeease give me an idea how to do this. Smilie
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

while loop exit

i wrote a while script as part of a huge program. this script, once picked, begins to output data to the person using it. pretty easy, as the person doesn't have to keep typing commands to get the output that the while loop automatically throws out. now, the thing is, while this while-script... (3 Replies)
Discussion started by: Terrible
3 Replies

2. Shell Programming and Scripting

Method to exit a for loop

Hi All, Can someone let me know how i can exit a for loop without exiting the script itself .... will the break statement work .... please help .... -Regards (2 Replies)
Discussion started by: Rohini Vijay
2 Replies

3. Shell Programming and Scripting

why isn't the exit status true?

the code: do } ] || mkdir -p ${mk_backup_dir} && echo "ERROR: release backup directory creation failed -${mk_backup_dir}" && exit done echo "INFO: Backup directories created" the result: mkdir: "/cm/uat_releases/riab/uat/2345": Permission denied ERROR: release backup directory... (5 Replies)
Discussion started by: mjays
5 Replies

4. Shell Programming and Scripting

Bash: Exiting while true loop when terminal is not the focus window

I am running an Ubuntu Gutsy laptop with Advanced Compiz fusion options enabled. I am using xdotool to simulate keyboard input in order to rotate through multiple desktops. I am looking for a way to kill a while true loop when the Enter key (or Control+C if it is easier) is pushed when the... (2 Replies)
Discussion started by: acclaypool
2 Replies

5. Shell Programming and Scripting

loop until true

Hi I need help with a script to loop unitl the statement is true done some thing like this until if then cp filename filename.anto fi done Regards, (3 Replies)
Discussion started by: antointoronto
3 Replies

6. Shell Programming and Scripting

Exit from loop

hi, how to exit from "if" loop?actually i have mutliple "if" conditions, i have to exit from each "if" loop,if it is true...:confused: Please suggest me... (3 Replies)
Discussion started by: sreelu
3 Replies

7. Emergency UNIX and Linux Support

For loop exit

Below for loop not exiting. Can someone help? JBOSS_INST_ARGS=01 02 if ; then for i in $JBOSS_INST_ARGS; do /u/jboss-6.1.0.Final/bin/jboss_init_wise$i.sh start; done (8 Replies)
Discussion started by: vino_hymi
8 Replies

8. Shell Programming and Scripting

While loop true problem

hi, i am new in bash scripting. i am trying to write a Bash script to monitor how many process are running in my Redhat6 Linux machine. example : let say there must be always 5 process from the same kind that must run and if one off them fails down the script must wake up another process... (2 Replies)
Discussion started by: zigizag
2 Replies

9. UNIX for Beginners Questions & Answers

Using exit in For Loop - Is this acceptable

Hi Folks - Here is a for loop I've created and I just wanted to see if this was okay practice: for M in NAME1 NAME1 NAME3 do echo "Executing MaxL:" $M >>${_LOGFILE} 2>&1 . ${_STARTMAXLPATH}startmaxl.sh ${_MAINPATH}${_MAXLPATH}$M.mxl _RC=$? if then ... (7 Replies)
Discussion started by: SIMMS7400
7 Replies

10. Shell Programming and Scripting

While true loop stopped

Hello Team, In my shell script, it stopped without killing it. Could you please help why ? Below is the code : get_dpi44_currentFiles() { truncate --size 0 $dpi_44_fixed_currentFileList if ssh $dpi_srvr_44 -p 2222 "ls $dpi_44_sourceFilesDir/fixed | grep '\.tgz$'" >... (5 Replies)
Discussion started by: sadique.manzar
5 Replies
exit(1) 							   User Commands							   exit(1)

NAME
exit, return, goto - shell built-in functions to enable the execution of the shell to advance beyond its sequence of steps SYNOPSIS
sh exit [n] return [n] csh exit [ ( expr )] goto label ksh *exit [n] *return [n] DESCRIPTION
sh exit will cause the calling shell or shell script to exit with the exit status specified by n. If n is omitted the exit status is that of the last command executed (an EOF will also cause the shell to exit.) return causes a function to exit with the return value specified by n. If n is omitted, the return status is that of the last command exe- cuted. csh exit will cause the calling shell or shell script to exit, either with the value of the status variable or with the value specified by the expression expr. The goto built-in uses a specified label as a search string amongst commands. The shell rewinds its input as much as possible and searches for a line of the form label: possibly preceded by space or tab characters. Execution continues after the indicated line. It is an error to jump to a label that occurs between a while or for built-in command and its corresponding end. ksh exit will cause the calling shell or shell script to exit with the exit status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the exit status is that of the last command executed. When exit occurs when executing a trap, the last command refers to the command that executed before the trap was invoked. An end-of-file will also cause the shell to exit except for a shell which has the ignoreeof option (See set below) turned on. return causes a shell function or '.' script to return to the invoking script with the return status specified by n. The value will be the least significant 8 bits of the specified status. If n is omitted then the return status is that of the last command executed. If return is invoked while not in a function or a '.' script, then it is the same as an exit. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
break(1), csh(1), ksh(1), sh(1), attributes(5) SunOS 5.10 15 Apr 1994 exit(1)
All times are GMT -4. The time now is 07:18 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy