I have a lengthy script which i have trimmed down for a test case as below.
more alter.txt
more allpath.txt
The above script reads for a physical path from allpath.txt. It then looks for all files except .logs & .class files using the find command find "$startdir" -type f \( ! -name "*.log*" ! -name "*.class*" \) -print.
Note: the find command above is instant if i fire it as a separate command from the bash shell on that directory location. Takes less than 2 secs to list all the files.
For each file found it searches for all the "search strings" mentioned in the alter.txt file while IFS= read -r var and replaces it with the corresponding text (this part of the code i have not shared considering not necessary)
For a folder 4GB in size it take around 25 mins to complete.
Can you help me optimize the script so it completes in less time.
Last edited by mohtashims; 06-27-2016 at 09:50 AM..
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I have a C program that takes anywhere from 5 to 100 arguments and I'd like to run it from a script that makes sure it doesnt take too long to execute. If the C program takes more than 5 seconds to execute, i would like the shell script to kill it and return a short message to the user. ... (3 Replies)
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like the title says, how can i measure the time it takes to load a module in Linux, and how how can i measure the time it takes to load a statically compiled module.
/Best Regards Olle
---------- Post updated at 01:13 PM ---------- Previous update was at 11:54 AM ----------
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Discussion started by: mohtashims
6 Replies
LEARN ABOUT CENTOS
escape
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)