03-24-2008
Debugging a shell script is entirely different than debugging a Visual C/C++ program. Sorry but there is no F7 available to help you. echo and print are you friends.
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1. Shell Programming and Scripting
Hi,
I was using AIX - ksh shell , and inorder to debug shell script I used set -vx to echo all the commands which are being executed.
Can anybody tell me the corresponding method in HP-UX - in tcsh shell.
Regards
Shihab (1 Reply)
Discussion started by: shihabvk
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Hello all,
I am trying to run a script and have not had much success running it...ne help debugging it will be appreciated..The ftp script alone works but not within the while loop.
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5. Shell Programming and Scripting
is there any way you can add a breakpoint in a script so you can stop on it?
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# ps -ef | grep rc
root 13903 1 0 08:56 ? 00:00:00 /usr/sbin/automount --timeout=60 /archive file /etc/auto_archive
root 10706 1 0 08:55 ? 00:00:00 /bin/bash /etc/rc.d/rc 3
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7. Shell Programming and Scripting
Hello, Some one asked me in the inteview.... The question is,
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Hello Friends
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#=========================================================================================================
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10. Shell Programming and Scripting
hi all
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escape(1) Mail Avenger 0.8.3 escape(1)
NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO
avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)