Shell Programming and Scripting

Greetings,

I have a script that uses this syntax:

for i in `ls *.pll`
do
echo Compiling Lib $i .....
frmcmp.sh userid=$LOGON module_type=LIBRARY module=$i compile_all=yes batch=yes
done
mv *.pll ../libs
mv *.plx ../libs
mv *.err ../libs

If there are no files that match though I get a couple of errors like:
ls: *.pll: No such file or directory
mv: cannot stat `*.pll': No such file or directory

Although it is not a big deal I'd like to fix the script to be more informative so say 'skipping compile as no matching files found' or something.
So do I just add an else clause or something to fix this?

TIA.

Create a list and test if it is empty:

list_file=`ls -1 *.pll 2>/dev/null`
if [ -z "$list_file" ]
then
echo "skipping compile as no matching files found"
exit 1
fi

for i in $list_file
do
....

Also, if you want to stick with your syntax, better to do it like this:

Code:

ls *.pll 2>/dev/null|while read fname; do
  ...something like test for 0 bytes first, etc.
done

Code:

for i in *.pll

Thanks all.
Looks like I can take it from here.

Spoke to soon and I guess I should have mentioned there is more to this file.
If I use exit1 example it works well until I add to that script to check for the next type of file so the exit1 looks like it exits the script versus continuing to process the script. Correct?
I mean I want to repeat that code to then check for .fmb file and compile and then .rdf files and run a different cmd against them.
I'll take a look at the 'while read fname' example if that might be a better method?

Assuming your files are always 'filename.extension', you can always use a case statement to determine next course of action, for example:

Code:

ls *.pll *.dll *.plx *.err *.fmb *.rdf 2>/dev/null|\
while read file_nm ; do
 # Maybe check filesize here then continue
 ext=`echo ${file_nm}|cut -d'.' -f2`
 case $ext in
   pll) echo do something with this $ext
   ;;
   dll) echo do something with this $ext
   ;;
   plx) echo do something with this $ext
   ;;
   fmb) echo do something with this $ext
   ;;
   err) echo do something with this $ext
   ;;
   *) echo do something with this $ext
   ;;
 esac
done