vlad Post: 302138336

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Top Forums Shell Programming and Scripting vlad Post 302138336 by barbus on Monday 1st of October 2007 06:43:16 AM

10-01-2007

Registered User

Quote:

Originally Posted by ghostdog74

Code:

v=0
while read  line
do
 v=$((v+1))
 printf "%s) %s\n"  $v  $line 
done < "file"

This is looks like something I can Smilie

I have a question though, the “while read line” statement, how does this get information from the file, is it from this “done < "file"”?.

sorry if am asking silly questions i only been using UNIX for a week now :P

also can i use the grep to achieve this, if say i will be looking for occurrences of the current user who is executing the script?(in this case it should be me, but i can use it for others)

cat xx| grep -n .\*| grep "^1"

or something like that, i cant test it atm, but i think cat pipes file to 'grep -n' which inserts line numbers and pipes it to 'grep '^1' which gets the line 1. odds are this might fail as this is 1st time i am going to use grep Smilie

Last edited by barbus; 10-01-2007 at 08:19 AM..

barbus

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LEARN ABOUT BSD

zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)