topic Re: LS Script in Operating System - HP-UX

LS Script

Ashwin_4 — Thu, 15 Jan 2004 06:28:57 GMT

Hi Masters,
Kindly help to write a script to get the file list with sequence no. If total no. of files to be selected is more than 10 then it should ask me two option whether to go next or want to select the file which was displayed using sequence no.

ls *A* --> total no of such files are 25
files should be displayed as below,
1. A1
2. A2
....
10. A10
Hit Enter for Next Page OR Select file no to display File

So if i press enter it should display next page and if i press file no it should display that filename.

I hope you understand my requirement.
Points will be given to all answers.

Thanks.

Re: LS Script

G. Vrijhoeven — Thu, 15 Jan 2004 06:41:06 GMT

Hi,

export COUNT=0
for i in `ls`
do
let COUNT="COUNT++1"
echo "$COUNT $i"
done

HTH,

Gideon

Re: LS Script

Elmar P. Kolkman — Thu, 15 Jan 2004 06:53:47 GMT

To number the files, you can use the nl command.
But you need to have it interactively. So it will become something like this:

cnt=1
ls *A* | while read file
do
filelist[$cnt]=$file
(( cnt = $cnt + 2 ))
done

page=1

while [ true ]
do
(( idx = ( $page - 1 )* 10 + 1 ))
while [ $idx -le (( $page * 10)) -a $idx -lt $cnt ]
do
printf "%4d %s\n",$idx,$filelist[$idx]
done

echo "Hit Enter for Next Page OR Select file no to display"
read answer
case "$answer"
"") (( page = $page + 1 ))
break
*) if [ -n "$filelist[$answer]" ]
then
cat $filelist[$answer]
else
echo "File does not exist"
fi
echo "Press return to continue"
read dummy
break
esac
done

Re: LS Script

Pete Randall — Thu, 15 Jan 2004 07:08:11 GMT

The simple solution:

clear; ll |nl |more -10

Pete

Re: LS Script

Pete Randall — Thu, 15 Jan 2004 07:10:16 GMT

Actually, that's only the ls display part and doesn't account for file display - sorry.

Pete

Re: LS Script

Ashwin_4 — Thu, 15 Jan 2004 11:21:40 GMT

Hi Elmar and all for your responses.
Elmar after executing your code i'm getting error at line 13.

Can you tell what could it be?

Thanks ..

Re: LS Script

Elmar P. Kolkman — Fri, 16 Jan 2004 01:25:46 GMT

Sorry, I didn't test what I wrote, just sent the idea of how I would solve your problem. Here is a version that is tested and works... until you have more then 1024 files in the directory. But that's easy to fix with the number of array elements in the set call. But would you walk more then 100 pages of 10 files ?!

#! /bin/ksh
set -A filelist 1024
cnt=0
ls *A* | while read file
do
(( cnt = $cnt + 1 ))
filelist[$cnt]=$file
done

echo $cnt

page=0
(( maxidx = $page * 10 ))

while [ $maxidx -lt $cnt ]
do
(( page = $page + 1 ))
(( maxidx = $maxidx + 10 ))
(( idx = $maxidx - 9 ))
[ $maxidx -gt $cnt ] && maxidx=$cnt
while [ $idx -le $maxidx ]
do
printf "%4d %s\n" $idx ${filelist[$idx]}
(( idx = $idx + 1 ))
done

echo "Hit Enter for Next Page OR Select file no to display"
read answer
case "$answer" in
"")
;;
*) if [ -n "${filelist[$answer]}" ]
then
cat ${filelist[$answer]}
else
echo "File does not exist"
fi
echo "Press return to continue"
read dummy
(( page = $page - 1 ))
(( maxidx = $page * 10 ))
;;
esac
done

Re: LS Script

Ashwin_4 — Fri, 16 Jan 2004 01:51:32 GMT

Hi Elmar,
I have 21 files in my dir. A1 to A21.
I'hv tested your script, which is failing to show the filename for which i have enter the sequence no.
./p1
21
1 A1
2 A10
3 A11
4 A12
5 A13
6 A14
7 A15
8 A16
9 A17
10 A18
Hit Enter for Next Page OR Select file no to display

11 A19
12 A2
13 A20
14 A21
15 A3
16 A4
17 A5
18 A6
19 A7
20 A8
Hit Enter for Next Page OR Select file no to display
12 <=== Input from me.
So output should be "A2"
But it is continuing the loop again.

Re: LS Script

Elmar P. Kolkman — Fri, 16 Jan 2004 02:15:41 GMT

Sorry... It displays the contents of the file... Can you change it yourself in the script? Second part of the case statement...

Re: LS Script

Jean-Louis Phelix — Fri, 16 Jan 2004 07:48:18 GMT

Hi,

This one simply uses the "select" function of sh. The only problem is that "Enter" redisplays current page, while any other input goes to next page (except if you select a number of course) :

#!/usr/bin/sh

LIST=$(ls -1 | tr '\012' ' ')
NB=10
PS3="Hit N for Next Page OR Select file no to display "
while [ ! -z "$LIST" ]
do
SUBLIST="$(echo $LIST | cut -d' ' -f1-10)"
LIST="$(echo $LIST | cut -d' ' -f11-)"
select FILE in $SUBLIST
do
[ -z "$FILE" ] && break
more $FILE
done
done

Re: LS Script

Ashwin_4 — Fri, 16 Jan 2004 14:01:05 GMT

Hi Jean-Louis,
I'm getting syntax error while executing your code. Can you please test and correct it.

Also, my kind request to you is, Do you have any tutorial for reading more about shell scripting.

Thanks in advance.

Re: LS Script

Ashwin_4 — Fri, 16 Jan 2004 23:08:59 GMT

Hi Jean-Louis,
OOOPS Sorry! Your code is working fine on HP-UX, I'm getting syntax error in TRU-64 Unix.

Please tell me where can I read about "select" command and other features of "sh"
.

Thanks

Re: LS Script

Jean-Louis Phelix — Mon, 19 Jan 2004 02:00:54 GMT

Hi,

I'm quite surprised about the syntax error on TRUE64. 'select' is a standard builtin command of the posix shell, so a 'man sh-posix' gives you all I know about it, including PS3 usage and so on ...

Regards.