WHILE LOOP that won't fail

[RJSHA1]

Loops in Unix seem to be the bane of my life. Can someone put me out of my misery and tell me what I am doing wrong in the code below. As I cannot get it to fail and exit the loop

ls $CTM_FTPIN | grep trigger | grep > filelist
while [ -s $filelist ]; do
do some coding here


nawk -v mnem=$mnem -v runopt=$run_opt -v batch=$batch_id -f aftn3220.awk filelist > filelist2 - this one line off the filelist

mv filelist2 filelist - replace the original file
done


What am I doing wrong here as I cannot get the loop to fil when the file is empty

Thanks
Bob

 

[vgersh99]

shouldn't this

while [ -s $filelist ]; do

be

while [ ! -s $filelist ]; do

vlad
+----------------------------+
| #include<disclaimer.h> |
+----------------------------+

 

[PHV]

Change this:
while [ -s $filelist ]; do
by this:
while [ -s filelist ]; do

Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[guggach]

RJSHA1: your script

ls $CTM_FTPIN | grep trigger | grep > filelist
while [ -s $filelist ]; do
do some coding here
...
done


a) the second grep is hanging, what should it do??
b) PHV's remark is correct, $filelist points to nothing.
c) why so complex? for what do you need a file?

for file in 'ls $CTM_FTPIN' # this are back quotes
do
case $file in *trigger*) ;; *) continue;; esac
exec-your-code $file
done




guggach

 

[RJSHA1]

Cheers for all the comments guys..