topic awk / cut script help .. in Operating System - HP-UX

awk / cut script help ..

rleon — Mon, 07 Dec 2009 02:48:40 GMT

I have the file with the following info:

/abc/def/myfile.txt
/qwe/rty/yui/myfile2
/a/b/c/d/mylog.log

In other words the files may or may not have extensions and will be in a variety of directories.

I would like my output to be like this:
/abc/def/
myfile.txt

/qwe/rty/yui/
myfile2

/a/b/c/d/
mylog.log

--------------------------------

#!/usr/bin/sh

for file in `cat files`
do
echo $file | do something to get the file name
echo $file | do something to get the directory of the file name
done

Thanks !

Re: awk / cut script help ..

Dennis Handly — Mon, 07 Dec 2009 03:29:39 GMT

for file in $(< files); do
echo $(dirname $file)
echo $(basename $file)
echo
done

I output the directory first, since that's what your required output format wanted.
Instead of dirname(1) and basename(1) you can use shell Parameter Substitution:
echo ${file%/*}
echo ${file##*/}

Re: awk / cut script help ..

TTr — Mon, 07 Dec 2009 03:33:56 GMT

There are two standard HP-UX commands that will do *exactly* what you need in your script above. Take a look at the man pages for "basename" and "dirname"

Re: awk / cut script help ..

Hein van den Heuvel — Mon, 07 Dec 2009 04:53:17 GMT

Using PERL ...

$ perl -pe "s;(/[^/]+)$;/\n\1\n;" x
/abc/def/
/myfile.txt

/qwe/rty/yui/
/myfile2

/a/b/c/d/
/mylog.log

s;(/ = substitute a slash
[^/]+ = followed by a bunch of non-slashes
) = which are to be remembered as \1
$ = at the end of a line;
; = and replace with
/\n\1\n; = a fresh slash, a newline, the remembered non-slashes and a bonus newline.

Similar, using AWK as per subject line:

$ perl -pe "s;(/[^/]+)$;/\n\1\n;" x
/abc/def/
/myfile.txt

/qwe/rty/yui/
/myfile2

/a/b/c/d/
/mylog.log

Now if there were multiple entries for one directory...
1) would you perhaps want one header, and multiple details?
2) Even if they are not adjacent in the input stream?

Enjoy,
Hein

Re: awk / cut script help ..

Hein van den Heuvel — Mon, 07 Dec 2009 04:56:20 GMT

Oops, bad repeat cut & paste. Meant to offer:

$ awk -F/ '{sub ($NF "$","\n" $NF "\n",$0); print}' x
/abc/def/
myfile.txt

/qwe/rty/yui/
myfile2

/a/b/c/d/
mylog.log

Just change the standard whitespace field seperator by a slash.
Look for the last field value ($NF) by anchoring it at the end of line with that $.
This is such that a file "b" in directory a/b/c would not find the first matching string /b/

Hein

Re: awk / cut script help ..

Viktor Balogh — Tue, 08 Dec 2009 14:28:48 GMT

Dennis, you don't need the extra echo ;)

>for file in $(< files); do
> echo $(dirname $file)
> echo $(basename $file)
> echo
>done

for file in $(< files); do
dirname $file
basename $file
echo
done

Re: awk / cut script help ..

Arturo Galbiati — Wed, 09 Dec 2009 10:47:07 GMT

HI,
small improvement to show the directory only when chnaged (or first time)

DirNam=
for file in $(< files); do
if [[ $DirNam != $(dirname $file) ]]; then
DirNam=$(dirname $file)
echo $DirNam
fi
basename $file
echo
done

HTH,
Art