Unix cut in c shell

Question

in file ~/x,

--- //zep/arod/jo/new/ded/main/changes 2013-05-13 17:14:34.000000000 -0700
--- //zep/arod/jo/new/ded/main/lib/soph/tool.py 2013-05-16 14:14:34.000000000 -0700
--- //zep/arod/jo/new/ded/main/lib/soph/pomp.py 2013-05-16 14:14:34.000000000 -0700

in c shell,

set F=`grep '^---' ~/x | cut -d/ -f7-99 | cut and somehow cut number`

then, ls $F should give

ded/main/changes
ded/main/lib/soph/tool.py
ded/main/lib/soph/pomp.py

I dont quite understand the -f tag and not sure how to cut the timestamp part

any suggestions?

Somehow `awk '/^---/{ sub(/\/\/zep\/arod\/jo\/new\//,""); print $2 }' ~/x` seems more straightforward. — tripleee, Aug 14 '13 at 17:35
yes i was looking into either awk or sed but i am really not familiar with those. @tripleee but ill stick with grep and cut for now — ealeon, Aug 14 '13 at 17:43

score 2 · Accepted Answer · answered Aug 14 '13 at 17:10

2

-f7-99 means "include fields 7 through 99" (which in this case, they probably just meant -f7- which would give all fields 7 and up).

cut divides each line up into fields, based on the divider (which is what -d/ is specifying - the divider in that case is the / character). It then returns the fields that you ask it for (in your example, 7 through 99).

Your second cut command could probably be cut -d' ' -f1 which would use a divider of spaces and only give you the first field (in other words, everything before the first space, which would be just the path).

answered Aug 14 '13 at 17:10

Amber

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yes. you are right. on the second part of the cut, what would be the best way to only cut the timestamp part 2013-05............. – ealeon Aug 14 '13 at 17:14
is it possible to -d by space maybe? – ealeon Aug 14 '13 at 17:23
ah ok let me try that – ealeon Aug 14 '13 at 17:24
ah that worked except the space between the text and 2013 is actually a tab. isnt -d default to tab? so cut -d -f1 should get rid of the anything that after tab? – ealeon Aug 14 '13 at 17:30
hmm it says cut: the dlimiter must be a single char for cut -d -f1 part – ealeon Aug 14 '13 at 17:32
You could just omit the `-d` entirely if you want tabs. – Amber Aug 15 '13 at 17:56
oh thats what they meant by default. omitting the use of the option. – ealeon Aug 15 '13 at 20:06

Unix cut in c shell

1 Answers1