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need help with script - output to file, but complicated

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Top Forums Shell Programming and Scripting need help with script - output to file, but complicated
# 8  
Old 10-27-2008
Quote:
Originally Posted by twoodcc

Code:
...
cat tim | while read LINE
do
if [LINE == "key 0"]; then
...

you need the "this is a variable" indicator, which in shell scripts is a dollar ($) sign. You also need to put a spaces around [ and ].
Also note, when assigning values to a variable, you don't use the dollar sign, only when retrieving values.
Code:
...
cat tim | while read LINE
do
if [ $LINE == "key 0" ]; then
...

# 9  
Old 10-27-2008
Quote:
Originally Posted by wempy
you need the "this is a variable" indicator, which in shell scripts is a dollar ($) sign. You also need to put a spaces around [ and ].
Also note, when assigning values to a variable, you don't use the dollar sign, only when retrieving values.
Code:
...
cat tim | while read LINE
do
if [ $LINE == "key 0" ]; then
...

thanks. i am getting somewhere. here is what i have now:

Code:
#!/bin/bash

output=$(uptime)
length=${#output}

cat tim | while read LINE
do
if [ "${LINE}" == "key 0" ]; then
for ((i=1; i<=length; i++))
do
character=$(echo $output | cut -c$i)
case "$character" in
[[:space:]]) echo "key <space>" >> tim;;
*) echo "key $character" >> tim;;
esac
done

fi
done

now, this finds the lines with "key 0", but still is writing to the end of the file, instead of writing over the lines that it finds. so my logic is all messed up.

basically, there is a block of text in the file that i want to overwrite with this output
# 10  
Old 10-27-2008
Hope below perl script can throw some light on you!!!

Code:
%hash=(' ','space','	','tab');
$str='a b	cde';
for($i=0;$i<(length $str);$i++){
	$key=($hash{substr($str,$i,1)}eq "")?substr($str,$i,1):$hash{substr($str,$i,1)};
	print "key ",$key,"\n";
}

# 11  
Old 10-27-2008
Quote:
Originally Posted by summer_cherry
Hope below perl script can throw some light on you!!!

Code:
%hash=(' ','space','	','tab');
$str='a b	cde';
for($i=0;$i<(length $str);$i++){
	$key=($hash{substr($str,$i,1)}eq "")?substr($str,$i,1):$hash{substr($str,$i,1)};
	print "key ",$key,"\n";
}

thank you for the reply! i do not know perl very much, but i saved that in a .py file and ran it 'python file.py' and it gave me an error on line 1
# 12  
Old 10-28-2008
its a perl script, not a python script. so you just type perl script.pl
# 13  
Old 10-28-2008
Quote:
Originally Posted by twoodcc
take output of command 'uptime' (up 32 days, 23:09)
place in file 'myFile'

output:
...
key u
key p
key space
key 3
key 2
key space
key d
...

anyone have any idea on how to do this?

thanks in advance
Code:
uptime | awk 'BEGIN{FS=""}{for(i=1;i<=NF;i++) print $i}'

# 14  
Old 10-28-2008
Quote:
Originally Posted by ghostdog74
its a perl script, not a python script. so you just type perl script.pl
oh, thanks! my mistake.

well, it ran, but what does it actually do?

Quote:
Originally Posted by ghostdog74
Code:
uptime | awk 'BEGIN{FS=""}{for(i=1;i<=NF;i++) print $i}'

well, this works, but doesn't do exactly what i had in mind. the output just prints each character on a new line, but i need it to add "key " before each character.

and i need to overwrite a certain part of a file with this data.
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