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Full Discussion: Question of grep
Top Forums Shell Programming and Scripting Question of grep Post 302176492 by ZAXTHEGREAT on Tuesday 18th of March 2008 11:23:19 AM
Old 03-18-2008
Quote:
Originally Posted by jim mcnamara
Are you trying to do steganography? Your example isn't clear to me. grep is not normally used to add something that isn't there already. It just searches, sed is used to change data.
The idea is to have some words within another file and then use a random select to get a word from that file and then generate as ----- so it is hidden from the user. From that they have to guess the letter and with the simple input they give this would then search the word for the letter and then replace it with the users inputted letter so ----a-- as an eg. The question is can grep be used if so or if not how to do this.
 

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LEARN ABOUT PHP

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)
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