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Full Discussion: Insert a line of text on nth line of a file
Top Forums UNIX for Beginners Questions & Answers Insert a line of text on nth line of a file Post 302967507 by drl on Wednesday 24th of February 2016 10:07:52 AM
Old 02-24-2016
Hi.

One of the missing routines is insert_every:
Code:
#!/usr/bin/env bash

# @(#) s1       Demonstrate repeating string insertion, insert_every

PROGRAM="./insert_every"
# Utility functions: print-as-echo, print-line-with-visual-space, debug.
# export PATH="/usr/local/bin:/usr/bin:/bin"
LC_ALL=C ; LANG=C ; export LC_ALL LANG
pe() { for _i;do printf "%s" "$_i";done; printf "\n"; }
pl() { pe;pe "-----" ;pe "$*"; }
db() { ( printf " db, ";for _i;do printf "%s" "$_i";done;printf "\n" ) >&2 ; }
db() { : ; }
C=$HOME/bin/context && [ -f $C ] && $C 

FILE=${1-data1}

pl " Input data file $FILE:"
cat $FILE

pl " Results:"
$PROGRAM --n=3 "Hello" < $FILE

pl " Text of perl code, $PROGRAM:"
cat $PROGRAM

exit 0

producing:
Code:
$  ./s1

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 3.16.0-4-amd64, x86_64
Distribution        : Debian 8.3 (jessie) 
bash GNU bash 4.3.30

-----
 Input data file data1:
1
2
3
4
5
6
7
8
9
10

-----
 Results:
1
2
3
Hello
4
5
6
Hello
7
8
9
Hello
10

-----
 Text of perl code, ./insert_every:
#!/usr/bin/env perl

# @(#) insert_every     Write first-parameter-string after --n=x lines.
# $Id: insert_every,v 1.2 2015/03/18 12:38:41 drl Exp drl $

# The Missing Textutils, Ondrej Bojar, obo@cuni.cz
# http://www.cuni.cz/~obo/textutils
#
# 'insert_every' processes stdin to stdout, writing ARG1 after every n
# lines

use strict;
use warnings;
use Getopt::Long;

sub usage {
  print STDERR "insert_every text_to_insert <stdin >stdout
Options:
  --n=X   ... insert after n lines
";
  exit 1;
}

my $n     = 10;
my $usage = 0;
GetOptions(
  "help" => \$usage,
  "n=i"  => \$n,
);
usage() if $usage;

my $extra = shift;

my $nr = 0;
while (<>) {
  $nr++;
  print;
  print $extra. "\n" if $nr % $n == 0;
}

To see all of the dozens of missing textutil perl codes, visit the web page of Ondrej Bojar as noted in the script comments (verified as of today, Wed Feb 24 09:05:48 CST 2016).

Best wishes ... cheers, drl
 

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LEARN ABOUT SUSE

gst-complete-0.8

gst-complete-0.8(1)						   User Commands					       gst-complete-0.8(1)

NAME

       gst-complete-0.8, gst-complete - perform bash completion for gst-launch command lines

SYNOPSIS

       complete -Cgst-complete-0.8 gst-launch

       gst-complete [--gst-list-mm] [--gst-mm=string] [--print]

DESCRIPTION

       gst-complete-0.8 enables bash to provide context-sensitive tab completion for gst-launch command lines. See gst-launch(1) for the syntax of
       gst-launch command lines.

       You must have a version of bash that supports programmable completion. Such versions of bash provide the complete built-in command.

       gst-complete is a wrapper script that runs the latest installed version of gst-complete-X.X. For example, if both gst-complete-0.7 and gst-
       complete-0.8 are installed on your system, gst-complete runs gst-complete-0.8.

OPTIONS

       The following options are supported by gst-complete-0.8 and gst-complete:

       --help	       Display detailed usage message. You can also use -? to specify this option.

       The following options are supported by gst-complete only:

       --gst-list-mm   List found major/minor versions. This option displays the versions that are available.

       --gst-mm=string Force  major/minor  version.  This  option  enables you to specify a specific version to run, if you do not want to run the
		       default version.

       --print	       Print wrapped command line. This option displays the command that will be run, and then runs the command.

EXAMPLES

       Example 1: Generating the Registry of Available Plugins by Running gst-compprep

       Run the following command in your .bash_profile or other appropriate place:

       example% complete -C gst-complete-0.8 gst-launch

       Example 2: Running the Wrapper Script and Displaying the Command Name

       example% gst-complete --print
       /usr/bin/gst-complete-0.8

FILES

       The following files are used by this application:

       /usr/bin/gst-complete-0.Executable for bash completion for gst-launch

       /usr/bin/gst-complete   Wrapper script that runs the latest installed version of gst-complete-X.X

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-media		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |External			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gst-compprep(1), gst-feedback(1), gst-inspect(1), gst-launch(1), gst-launch-ext(1), gst-md5sum(1), gst-register(1), gst-thumbnail(1),  gst-
       typefind(1), gst-xmlinspect(1), gst-xmllaunch(1), gstreamer-properties(1), libgstreamer-0.8(3), libgstgetbits(3)

NOTES

       Original man page written by the GStreamer team at http://gstreamer.net/.

       Updated by Brian Cameron, Sun Microsystems Inc., 2004.

SunOS 5.10							    14 Oct 2004 					       gst-complete-0.8(1)
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