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-gt option in UNIX

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# 8  
Old 02-04-2019
Quote:
Originally Posted by onenessboy
what does that -gt option represents ?
numerical comparison.
Quote:
integers can only be compared with:
-eq # equal
-ne # not equal
-lt # less than
-le # less than or equal
-gt # greater than
-ge # greater than or equal
Last edited by jim mcnamara; 02-04-2019 at 09:43 AM..
# 9  
Old 02-04-2019
Quote:
Originally Posted by RudiC
First logical error:COUNT=$(echo "${BACKUPLIST}" | wc -l). Guessing you want that file's line count, try
Code:
COUNT=$(<"${BACKUPLIST}"  wc -l)

Probably not. The way threads O/P showed the string in #1 the string contains filenames separated by newlines and the command results in the number of filenames then. I don't say this is a good idea but under these circumstancs it at least makes sense:

Code:
x='first line
second line
third line'
echo "$x" | wc -l
3

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
RudiC
# 10  
Old 02-04-2019
Oohhh. Yes, if you look at it from this aspect, the echoing of the variable makes some sense; I was wrong. I interpreted $BACKUPLIST to point to a file listing the backups.
Thanks for pointing this out.


Wouldn't it make more sense to use a shell array (saving running many external commands) to achieve the same goal? Like
Code:
$ IFS=$'\n'
$ BCKARR=(${BACKUPLIST})
$ echo ${#BCKARR[@]}
3
$ if [ ${#BCKARR[@]} -gt $RESTOREPOINTS ]
>    then START=${BCKARR[0]}
>         END=${BCKARR[${#BCKARR[@]}-$RESTOREPOINTS]}
>    fi

Hmmm - I see nezabudka was on the same track.
Last edited by RudiC; 02-04-2019 at 02:40 PM..
This User Gave Thanks to RudiC For This Post:
nezabudka
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