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Full Discussion: Perl script to read string from file#1 and find/replace in file#2
Top Forums Shell Programming and Scripting Perl script to read string from file#1 and find/replace in file#2 Post 302951662 by pchang on Sunday 9th of August 2015 10:08:22 AM
Old 08-09-2015
Thanks Aia for your suggestion.

abc.sed could vary in size from 1 to maybe 10,000 records

I'm trying to find a solution that will work faster than sed. It doesn't have to be Perl specifically. If you have some other ideas to process the file faster, that would be great.


I tried your code but getting the following error:
Code:
more test.pl
#!/usr/bin/perl

use strict;
use warnings;

my %replace;

open my $fh, '<', "abc.sed" or die "$!\n";
my @gsubs = <$fh>;
close $fh;
@gsubs = map{s/^s\/|\/g|\n//g; split "/"} @gsubs;
%replace = @gsubs;

my $search = join '|', keys %replace;

open $fh, '<', "abc.dat" or die "$!\n";
while(<$fh>) {
    s/($search)/$replace{$1}/ge;
    print;
}
close $fh;

Code:
sh test.pl

test.pl: line 3: use: command not found
test.pl: line 4: use: command not found
test.pl: line 6: my: command not found
Couldn't get a file descriptor referring to the console
test.pl: line 9: syntax error near unexpected token `;'
test.pl: line 9: `my @gsubs = <$fh>;'

I made test.pl executable and /usr/bin/perl executable exists on the Linux box.

Thanks.

---------- Post updated at 10:08 AM ---------- Previous update was at 07:26 AM ----------

I'm thinking of another option to use instead of sed or Perl, how about tr?

Do you think that this will work faster?

Thanks.
 

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LEARN ABOUT DEBIAN

pkgproto

pkgproto(1)							   User Commands						       pkgproto(1)

NAME

       pkgproto - generate prototype file entries for input to pkgmk command

SYNOPSIS

       pkgproto [-i] [-c class] [path1]

       pkgproto [-i] [-c class] [path1=path2...]

DESCRIPTION

       pkgproto scans the indicated paths and generates prototype(4) file entries that may be used as input to the pkgmk(1) command.

       If  no paths are specified on the command line, standard input is assumed to be a list of paths. If the pathname listed on the command line
       is a directory,	the contents of the directory is searched.  However, if input is read from stdin, a directory specified as a pathname will
       not be searched.

OPTIONS

       -i	       Ignores symbolic links and records the paths as ftype=f (a file) versus ftype=s (symbolic link).

       -c class        Maps the class of all paths to class.

OPERANDS

       path1	Pathname where objects are located.

       path2	Pathname which should be substituted on output for path1.

EXAMPLES

       Example 1: Examples of the use of pkgproto.1.

       The following two examples show uses of pkgproto and a partial listing of the output produced.

       Example 1:

       example% pkgproto /bin=bin /usr/bin=usrbin /etc=etc
       f none bin/sed=/bin/sed 0775 bin bin
       f none bin/sh=/bin/sh 0755 bin daemon
       f none bin/sort=/bin/sort 0755 bin bin
       f none usrbin/sdb=/usr/bin/sdb 0775 bin bin
       f none usrbin/shl=/usr/bin/shl 4755 bin bin
       d none etc/master.d 0755 root daemon
       f none etc/master.d/kernel=/etc/master.d/kernel 0644 root daemon
       f none etc/rc=/etc/rc 0744 root daemon

       Example 2:

       example% find / -type d -print | pkgproto
       d none / 755 root root
       d none /bin 755 bin bin
       d none /usr 755 root root
       d none /usr/bin 775 bin bin
       d none /etc 755 root root
       d none /tmp 777 root root

EXIT STATUS

       0	Successful completion.

       >0	An error occurred.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       pkgmk(1), pkgparam(1), pkgtrans(1), prototype(4), attributes(5)

       Application Packaging Developer's Guide

NOTES

       By  default,  pkgproto creates symbolic link entries for any symbolic link encountered (ftype=s). When you use the -i option, pkgproto cre-
       ates a file entry for symbolic links (ftype=f). The prototype(4) file would have to be edited to assign such file types as v (volatile),  e
       (editable), or x (exclusive directory). pkgproto detects linked files. If multiple files are linked together, the first path encountered is
       considered the source of the link.

       By default, pkgproto prints prototype entries on the standard output. However, the output should be saved in a  file  (named  Prototype	or
       prototype, for convenience) to be used as input to the pkgmk(1) command.

SunOS 5.10							    6 Nov 2000							       pkgproto(1)
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