Shell Programming and Scripting

In my a.KSH file this coding is present. I couldn't understand this. Please tell me the meaning of this coding.

file_size=`ls -l $1|awk '{print $5}' `
exit $file_size

I try a lot to understand, but couldn't.

this will echo the size of file passed as the commandline parameter.
it has two parts,
ls -l $1, this will get the listing for the file passed as parameter

awk...., this will get the 5th column from the ls -l $1 output which is the size of the file

Gaurav

Actually in another pro*c file this coding has written. The coding is

strcpy(size_script_path,getenv("COM_DIR"));
strcat(size_script_path,"/aa.ksh");

But in my KSH this coding is present.

file_size=`ls -l $1|awk '{print $5}' `
exit $file_size

I try a lot to understand, but couldn't.


So what this KSH is link to this pro*C program? If yes, how it is , please suggest me.

this is my interpretation may be wrong as well as I don't have any idea about pro*c

the pro*c code is calling this script to get the size of a file.
the script returns the size of the file.

Some details are missing from your description.

size_script_path contains the fully qualifies path to aa.ksh, provided the env variable COM_DIR was set appropriately.

Your mention of $1 says that took in some command line parameters for your shell script. Lets say, you passed in the contents of size_script_path to the script, file_size will hold the size of aa.ksh.

I dont understand how you related C calls and shell scripting together. Maybe I am missing something.

no one can undestand the program just by seeing 4 lines of code(of 2 different files).
I can guess that ur variable size_script_path contains the full path of script aa.ksh.
Your script(or may be function in the script) is returing the size of file.
Please be specific and clear when you are posting a question.

Ok, i will send the details of that program. But this is another KSH file, which i couldn't understand. The full code, i have given here. i.e.,

#!/bin/ksh
cd /ngs/dep/debppp/rel3321-B03/bin
./startserver >/dev/null
cd /ngs/deb/debppp/rel3321-B03-8606/bin
./startserver >/dev/null
cd /ngs/deb/debppp/rel3321-B03-8608/bin
./startserver >/dev/null