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From: | |
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Date: | Mon, 9 Jun 2014 15:09:18 -0700 |
Content-Type: | text/plain |
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On 06/07/2014 07:17 PM, ToddAndMargo wrote:
> 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
>
>
Hi Guys,
Thank you for the help. If you are curious, this is
what became of all the bash syntax questions.
-T
DownloadApp () {
# $1 Application Name
# RtnState: 0 = unknown (default)
# 1 = no update found
# 2 = update found
# 3 = error
App=$1
Status=0
Col_Grey="\x1b[30;01m"
Col_Red="\x1b[31;01m"
Col_Blue="\x1b[38;49;00m"
Col_Reset="\x1b[39;49;00m"
AppDot="${App}: "; AppDot="${AppDot:0:30}"
eval "$App"; RtnState=$?
if [ "$RtnState" == "3" ]; then MasterStatus=1; fi
case $RtnState in
"1" )
StatusLog="${StatusLog}\n${AppDot} ${Col_Grey}no new
updates${Col_Reset}"
;;
"2" )
StatusLog="${StatusLog}\n${AppDot} ${Col_Blue}new update
downloaded${Col_Reset}"
;;
"3" )
StatusLog="${StatusLog}\n${AppDot} ${Col_Red}ERROR. See
details above${Col_Reset}"
MasterStatus="1"
;;
*)
StatusLog="${StatusLog}\n${AppDot} ${Col_Red}did not return
a recognized status <{$RtnState}>${Col_Reset}"
esac
tput sgr0 # Reset text attributes to normal without clear
}
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