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Full Discussion: Replace line via perl script of file
Top Forums UNIX for Dummies Questions & Answers Replace line via perl script of file Post 302495950 by Tarun24 on Friday 11th of February 2011 04:15:19 PM
Old 02-11-2011
Replace line via perl script of file
Hi All,
I wanted to do following.
1) If file exit then open file for reading and check if my string is there then
i wanted to replace the entire line with that string + something else
then close the file.
2) If file does not exit then i need to open the file and write to it.

I am done with part two but for the first part i can search the string but cannot replace the line...Here is my code. Please help me.
Code:
use constant MYFILEINFO  => "read.my.file.version";


if ( -e "tarun.info" )
{
       open DEFAULT_PROPERTY, "< tarun.info"
             or die "Error: Failed opening file for writing. $!\n";

    while (my $line = <DEFAULT_PROPERTY>)
    {
        if ($line =~ /^@{[MYFILEINFO]}/)
        {
           # Need code here to replace the line 
            push(@property_content, $line);
            close DEFAULT_PROPERTY or die "Error: Failed closing . $!\n";
            exit();
        }
   }
}

### Here i can open file to append and write my sfutt
## For which my code already works...

Last edited by Scott; 02-11-2011 at 05:33 PM.. Reason: Please use code tags
 

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LEARN ABOUT DEBIAN

strip_stx

strip_stx(1)						      General Commands Manual						      strip_stx(1)

NAME

       strip_stx - a simple literate programming tool

SYNOPSIS

       strip_stx [ -c commentchars ] [ -B open	close ] [ file	file ... ]

DESCRIPTION

       strip_stx  takes  all  structured  text (Stx) markup away from the listed files, leaving only text in preformatted blocks.  If no files are
       listed, standard input is read instead.	The result is written to standard output.

       This is intended as a simple literate programming tool: programmers may write their programs as documents, processing them with stx2any for
       documentation and publication but with strip_stx for compilation / running the code.

       More information about Stx is on the manpage of stx2any.

OPTIONS

	  -c commentchars
		 comment  out the non-code portions (text outside preformatted blocks) with the given commentchars at the beginning of every line.
		 If this option (or the next one) is not given, non-code portions are simply deleted.

	  -B open  close
		 surround the non-code portions with (comment-)opening and closing markers open and close respectively.  This option can  be  used
		 together with the -c option.

	  --version, -V
		 Just show version information and exit.

	  --help, -?
		 Just show a short help message and exit.

EXAMPLES

	       strip_stx parse.py.stx > parse.py

       Strip documentation away from the source file parse.py.stx, supposedly only leaving python code there.

	       strip_stx -B '/*' ' */' -c ' * ' my.c.stx > my.c

       Make a literate C code document into proper C source file, leaving the documentation in neatly-formatted comments.

	       strip_stx -B 'cat < < EOT' 'EOT' embshell.stx > embshell.sh

       Turn the document embshell.stx into an "embedded shell" script, where all non-program portions are printed to the standard output when exe-
       cution reaches them.  This is akin to PHP or eperl; but strip_stx is not really meant for this.	There are other options for making  embed-
       ded scripts, such as defining your own markup for the code portions or handling the program logic with m4 within stx2any.

SEE ALSO

       stx2any (1)

AUTHOR

       This page is written by Panu A. Kalliokoski.

Panu A. Kalliokoski														      strip_stx(1)
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