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Full Discussion: Get records that does not contain particular strings
Top Forums Shell Programming and Scripting Get records that does not contain particular strings Post 302488014 by joeyg on Friday 14th of January 2011 01:25:39 PM
Old 01-14-2011
Hammer & Screwdriver thinking about character classes
[:alnum:] == printable characters
[:cntrl:] == control characters

So, I am thinking about a
Code:
grep "[:cntrl:]"

to get at lines that have control characters. Or,
Code:
grep "![:alnum:]"

to get what is not printable.
 

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LEARN ABOUT MINIX

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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