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Right-align text in console using pipe like ( command | right )

Terminal - Right-align text in console using pipe like ( command | right )
$ right(){ l="$(cat -)"; s=$(echo -e "$l"| wc -L); echo "$l" | while read l;do j=$(((s-${#l})));echo "$(while ((j-->0)); do printf " ";done;)$l";done;}; ls --color=none / | right
2011-02-14 16:58:37
User: glaudiston
Functions: echo ls read wc
Right-align text in console using pipe like ( command | right )


There are 5 alternatives - vote for the best!

Terminal - Alternatives

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What others think

Nice, but POSIX wc doesn't have -L. You can use awk instead; just replace the

wc -L


awk ' { if ( length > L ) { L=length} }END{ print L}'

and you're there. Doing this takes the function beyond 255 chars, which may be a problem (so don't one-line it).

Comment by dfaulkner 217 weeks and 5 days ago

Also worth noting that these don't right-justify the text (within your terminal window confines). They just right align any lines coming out. So a single line is still flush-left, and the longest line still begins at column zero.

Comment by dfaulkner 217 weeks and 5 days ago


If you want to define the linesize you can do samething like it:

right(){ l="$(cat -)"; [ -n "$1" ] && s=$1 || s=$(echo -e "$l"| wc -L); echo "$l" | while read l;do j=$(((s-${#l})));echo "$(while ((j-->0)); do printf " ";done;)$l";done;}; ls --color=none / | right 150

with this u can pass the linesize as parametter or remove the parametter and use the max-line-size of input

Comment by glaudiston 217 weeks and 5 days ago

Seems overly complicated.

right(){ while read;do printf "%${1:-${COLUMNS:-80}}s\n" "$REPLY";done };ls / | right
Comment by eightmillion 217 weeks and 5 days ago

@eightmillion, this way is simple, but you lost the alignment by text, you will have only the column alignment.

and "tput cols" works for me, ${COLUMNS} is not set.

then I think

right(){ while read;do printf "%${1:-$(tput cols)}s\n" "$REPLY";done };ls / --color=none | right

more efetive in you example.

tnks for your way.

Comment by glaudiston 217 weeks and 4 days ago

Your point of view

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