Shell Programming and Scripting

Hi All ,,

This is my code .. i am checcking a file temp66.txt , when i execute this
shell it checks whether the file is 0 byte file or not ..

if it is a 0 byte file , then Program exists out else it Prints the Echo Statement ..


if [ -s temp66.txt] then
RET_CODE=$?
if [ $RET_CODE -ne 0 ] then
echo 'File is Zero '
exit 99
fi

else
echo "Shell Worked"


Please help me on this !! i am working on something which will help me when this is resolved !!

fi

Correct your code as:

Code:

if [ -s temp66.txt]
then
   echo 'File is Zero '
   exit 99
else
   echo "Shell Worked"
fi

Note: The indentations are only for readability

if tests the exit status of [. In the "if" branch, by definition, $? will be 0. It is the exit code of the command [ -s temp.txt ]. Yes, it is confusing to newbies that "open square bracket" is the name of a command, but that's what it is. You can call it test if you think that's less confusing.

Code:

test -s file66.txt || { echo "It's zero"; exit 99; }

unilover: you have the logic backwards, it's zero in the else branch.

i am not sure of this above statement !

when i execute the above command , if the file size is not zero will it move on to the other line like (( echo "shell script worked"))

Thanks a lot !!

Yes, it will not exit if the file's size is non-zero.

Thanks !!!

but i donot want to Print any lines like "Its zero"

test -s file66.txt || {exit 99; }
echo "Shell Script Worked"

Thanks a lot !!