To be honest i think you should change your programs logic completely: You enter a character (or word), some values are legal, ALL others are not. You do not need the functionality of a while-loop at all, so why should you use it?
How about the following, which is easily extensible:
This should also be easier to read and to maintain.
If you want to use the code part as a device to process the commandline you could also resort to the getopts-program. Have a look at the manpage for it and if this fits your requirements and you still have problems applying it come back and ask again.
I am trying to take input from a file and direct it into a bash script. This script is meant to be a foreach loop. I would like the script to process each item in the list one by one and direct the output to a file.
# cat 1loop
#!/bin/bash
# this 2>&1 to redirect STDERR & STDOUT to file... (4 Replies)
Hi All,
I wrote one simple for loop shell script which prints number..but this loop is infinite...but its taking lot of CPU (15.7) %. if i am using sleep cmd then cpu usage become 0.4 %. Is there anyway to reduce this CPU usage without using sleep cmd?
i dont want 2 use sleep cmd... (7 Replies)
I'm new from UNIX scripting. Please help.
I have about 10,000 files from the $ROOTDIR/scp/inbox/string1 directory to compare with the 50 files from /$ROOTDIR/output/tma/pnt/bad/string1/ directory and it takes about 2 hours plus to complete the for loop. Is there a better way to re-write the... (5 Replies)
I'd like to
1. Check and compare the 10,000 pnt files contains single record from the /$ROOTDIR/scp/inbox/string1 directory against 39 bad pnt files from the /$ROOTDIR/output/tma/pnt/bad/string1 directory based on the fam_id column value start at position 38 to 47 from the record below. Here is... (1 Reply)
Gurus,
I need to read a line from a file and strip the characters from it and compare the stripped value with the value I pass to the script while executing it. Below is the code for the same. But when i execute the code, it is throwing an error.
#!/bin/ksh
. /home/.i_env
... (14 Replies)
How do I go about amending this simple script that prompts for a yes/no response so that if neither Y or N are entered it will loop back back to the original prompt
#!/bin/ksh
echo "Enter yes of no"
read answer
if
then
echo "You selected yes"
elif
then
echo "You selected no"
elif... (5 Replies)
I have below files under dir_a and dir_b and i want to sort out number of dir_a and dir_b files seperately and if i do the grep it should retrun 2 files in dir_a and 1 file in dir_b.
/dir_a/12345678
/dir_a/87654321
/dir_a/dir_b/12345687
But i am getting cat file|grep dir_a|wc -l
3... (6 Replies)
Hi,
I am new to unix/linux scripting.
I have a text file, listlib.txt where the content:
lib1_23
lib34_a
ab_li_lab
I need to generate a file (.log) of each cell. I am planning to create a (.csh) script that will have for loop with variable taken from listlib.txt. As for now, i have no... (4 Replies)