On 06/07/2014 06:00 PM, zxq9 wrote:
On Saturday 07 June 2014 17:38:35 you wrote:
Hi All,
Bash: I am trying to use a variable to hold
a log and add to it as I go. I can do this
with a temp file, but I'd rather do it with
a variable.
I have gotten this far:
A=$(echo -e "abc\n")
A="$A"$(echo -e "def\n")
A="$A"$(echo -e "ghi\n")
echo $A
abcdefghi
echo -e $A
abcdefghi
What am I doing wrong? Is it better to just break
down and just use a file?
The assignment doesn't need echo, and the series of "echo -e" is swallowing
the newlines you expected to have in place.
Here's an example:
-----------------
ceverett@jalapeno ~/Code/bash $ cat var-log.bash
#! /bin/bash
a="start of log"
for newdata in $(seq 1 10)
do
a="$a\n$newdata"
done
echo -e "$a"
ceverett@jalapeno ~/Code/bash $ ./var-log.bash
start of log
1
2
3
4
5
6
7
8
9
10
-----------------
But really, you shouldn't store a log in a variable, especially if it might
receive a lot of traffic (and especially since you lose everything in the
event of a program interruption of any sort, which defeats the purpose). You
could accumulate a bit of data in a variable, but you should always flush it
to a file. The append redirect operator was designed specifically to make this
easy; not using it is going against the grain.
Hi zxq9,
I see what I did wrong. Thank you!
It is a small log. Only about 20 line
of text in it.
-T
--
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