06-01-2012
How to handle CTRL+Z or CTRL+C in shells script?
Hi,
while executing shell script, in the middle of the process, if we kill the shell script( ctrl+z or ctrl+c), script will be killed and the files which using for the script will be in the folder.
How to handle those scenarios. Is there any possibilities, if user breaks the script, I need to remove those files from the folder. Can we include this in the same script itself.
I dont want to add trap "" 2 20. Because at some point of time, i have to use ctrl+z or ctrl+c, so i need to clear the files after breaking the script.
Thanks in advance.
Chelladurai.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
How do you make a script so the user can not press ctrl+c and break out of the script?
Thanks,
:) (1 Reply)
Discussion started by: newtounix
1 Replies
2. Shell Programming and Scripting
Hi all
I am looking for a way to ensure that once a user is logged in and running a script, he cannot break out of it.
Thanks
J (12 Replies)
Discussion started by: jhansrod
12 Replies
3. AIX
I wrote a ksh script for Helpdesk. I need to know how to disable ctrl-c,ctrl-z,ctrl-d..... so that helpdesk would not be able to get to system prompt :confused: (6 Replies)
Discussion started by: wtofu
6 Replies
4. Shell Programming and Scripting
Hi there,
I'm using HP-UX 11 machine. I am running a script, thats gonna take a long time to execute. When I press ctrl-c to come out of my script, I have to catch that signal(ctrl-c) and display that ctrl-c had been pressed. How can I do it.
Thanks in advance (2 Replies)
Discussion started by: sendhilmani123
2 Replies
5. Shell Programming and Scripting
Hi,
I'm trying to make a script that reads the console input and terminates with CTRL+D. It's absolutely basic but I don't know how to "read" the CTRL+D. I've tried a bunch of things like
EOT=^D
while //with & without quotations
do
read input
echo $input
done
while
while ]
... (12 Replies)
Discussion started by: sanchopansa
12 Replies
6. Shell Programming and Scripting
H! I have written script where it need to invoke the perl script in background, then write the pid in temp file then bring back the job to foreground. whenever the Ctrl-C or Ctrl-Z is pressed in the script has to exit and prompt should be dispalyed. but this script causing exit from shell session... (2 Replies)
Discussion started by: jramesh1
2 Replies
7. Shell Programming and Scripting
how to send ctrl-c signal in scripts ???
i am executing top command in .exp script
top command gives cpu running activities on your machine
eg
# top
top - 18:41:01 up 8:38, 5 users, load average: 0.03, 0.16, 0.16
Tasks: 172 total, 1 running, 170 sleeping, 0 stopped, 1 zombie... (3 Replies)
Discussion started by: alexzander18
3 Replies
8. Shell Programming and Scripting
The below script has Perl script in it where it gives the usage details.
filer.sh
echo
echo -en "Enter filer : "
read filer
echo "test.pl -f $filer -F L"
Output
=========
The following hosts are online and available:
Name Total Allocated Used ... (2 Replies)
Discussion started by: nareshkumar522
2 Replies
9. UNIX for Dummies Questions & Answers
Hi friends,
I am trying to add a newline char ('\n') between the query and the commit statement in the following shell script.
#! /bin/sh
echo "select * from tab; commit;" > data.sql
I have tried typing in "Ctrl-V + Ctrl-J" combination which has inserted ^@ (NUL) character but the commit... (1 Reply)
Discussion started by: royalibrahim
1 Replies
10. Shell Programming and Scripting
Hi..!
I'm stuck with my automation of starting a process and keeping it running even after the current ssh session has exited..
So i'm trying to use command 'screen'. which is doing exactly what i wanted, But the problem is automation of the same.
i will have to press Ctrl+a and Ctrl+d for... (2 Replies)
Discussion started by: chandana hs
2 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)