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string extraction won't work. Why?


 
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Operating Systems Solaris string extraction won't work. Why?
# 1  
Old 03-22-2011
string extraction won't work. Why?

Code:
#!/usr/bin/ksh
set -x
testfile=my.test.file.flag
echo ${testfile: (-4)}
#/home/maldohe/scripts/spawn1&
sleep 3
echo myspawn is now ending
exit

Background:
I am trying to extract the word flag from anf given file name. This is a demo script that I am working on to fix a production issue. We get FTP files from various place and each come with a "FLAG" file once the data file is received. I am want to trap for the "FLAG" file and do something with it before it gets processesd.

Thanks in advance

Last edited by pludi; 03-22-2011 at 04:52 AM..
Harleyrci
# 2  
Old 03-22-2011
I'm not sure I understand completely.

Do you want the filename minus ".flag"? If so:
Code:
#! /usr/bin/ksh

testfile=my.test.file.flag
printf '%s\n' "${testfile%.flag}"

# 3  
Old 03-22-2011
Code:
echo ${testfile%%.flag}

I am guessing you want to remove the .flag part from the filename.
This is called parameter substitution, you can look up the rest of the operator for this online or in your man page
# 4  
Old 03-22-2011
Actually, I am reviewing all files received and the files with the word "FLAG" as part of the filename I need to suspend for a time. Normally, the word "FLAG" comes at the end of the file name.
Harleyrci
# 5  
Old 03-22-2011
You need to be very clear here.

What do you mean by "suspending" based on a file? What exactly do you want to do?
# 6  
Old 03-22-2011
Sorry, if my script find a file with the word "FLAG" in the name, I am going to move that file to a new location so that it does not get picked up by another deamon process until a later time.

---------- Post updated at 11:10 PM ---------- Previous update was at 11:05 PM ----------

If the initial script that I posted could work I could test for the existance for the word "FLAG" or at least test the return code $? i think.
Harleyrci
# 7  
Old 03-22-2011
OK, how about:
Code:
#! /usr/bin/ksh

for file in *; do
	if [[ "${file:(-4)}" == "flag" ]]; then
		# Do some processing here. Maybe:
		/bin/mv "$file" /tmp/
	else
		# Do something else. Maybe nothing.
		:
	fi
done

If that more of what you were looking for?

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