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Full Discussion: Delete block of text in one file based on list in another file
Top Forums Shell Programming and Scripting Delete block of text in one file based on list in another file Post 302350158 by ripat on Thursday 3rd of September 2009 02:19:50 AM
Old 09-03-2009
Or in awk, this seems to produce the desired output with the given sample files:

Code:
awk 'FNR>=NR{a[" Using archive: "$0]=1;next}{RS=ORS="\n\n";FS="\n"}!a[$2]{print}' listfile datafile

I don't like too much the {RS=ORS="\n\n";FS="\n"} bloc that executes on every lines of the second file but I don't know how do avoid this. Can't do that variable assignment in the BEGIN bloc as the first file will then not be parsed correctly. Any idea?


Edit
The only thing I could think of is to flag the variable assignment so that when it is done once, skip it on the next line:
Code:
awk 'FNR>=NR{a[" Using archive: "$0]=1;next}!f{RS=ORS="\n\n";FS="\n";f=1}!a[$2]{print}' flle1 flie2

Last edited by ripat; 09-03-2009 at 03:59 AM..
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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