for i in `cat file` do Post: 302551064

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Top Forums UNIX for Advanced & Expert Users for i in `cat file` do Post 302551064 by radoulov on Monday 29th of August 2011 09:07:27 AM

08-29-2011

Registered User

If you want to preserve the input file content intact
during processing you should be using something like
this:

Code:

while IFS= read -r var; do
  printf '%s\n' "$var"
done < infile

Consider the following:

Code:

bash-2.03$ ls
infile
bash-2.03$ cat infile
one two
-n -e ok?

   three *
bash-2.03$ for i in `cat infile` ; do   echo $i    ; done
one
two

ok?
three
infile
bash-2.03$

And:

Code:

bash-2.03$ while IFS= read -r var; do   printf '%s\n' "$var"; done < infile
one two
-n -e ok?

   three *
bash-2.03$

So the later with Perl would be:

Code:

bash-2.03$ perl -pe1  infile
one two
-n -e ok?

   three *

Or:

Code:

#!/usr/bin/perl

use warnings;
use strict;

open my $infile, '<', 'infile'
  or die "open: $!\n";
  
print while <$infile>;

close $infile
  or warn "close: $!\n";

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FC-CAT(1)																 FC-CAT(1)

NAME

       fc-cat - read font information cache files

SYNOPSIS

       fc-cat [ -rvVh ]  [ --recurse ]	[ --verbose ]  [ --version ]  [ --help ]

	[  [ fonts-cache-%version%-files ]  [ dirs ] ... ]

DESCRIPTION

       fc-cat reads the font information from cache files or related to font directories and emits it in ASCII form.

OPTIONS

       This  program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included
       below.

       -r     Recurse into subdirectories.

       -v     Be verbose.

       -h     Show summary of options.

       -V     Show version of the program and exit.

SEE ALSO

       fc-cache(1) fc-list(1) fc-match(1) fc-pattern(1) fc-query(1) fc-scan(1)

       The fontconfig user's guide, in HTML format: /usr/share/doc/fontconfig/fontconfig-user.html.

AUTHOR

       This manual page was written by Patrick Lam <plam@mit.edu>.

								   Aug 13, 2008 							 FC-CAT(1)

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