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Full Discussion: Using Grep in a Shell Script
Top Forums Shell Programming and Scripting Using Grep in a Shell Script Post 66608 by zazzybob on Wednesday 16th of March 2005 07:51:37 AM
Old 03-16-2005
So each file has a consistent number of lines, right?

The following (g)awk program will do the trick. Just set the modulus to whatever you need (i.e. if the filenames appear every 5 lines change the modulus to $0 % 5). Save this as whatever.awk and make executable, then invoke with
$ ./whatever.awk input_file
Code:
#!/usr/bin/gawk -f

BEGIN { FS="\n" }

{ if ( $0 % 4 == 0 ) {
  filename = $0
} else {
  print $0 >> filename
} }


Here's a way of doing it using bash
Code:
#!/bin/bash

current_line=0
# file_length is the number of lines in each "file"
# excluding the n.txt lines....
file_length=3

while read line; do
  if [ $(( current_line % ( file_length + 1 ) )) -eq "0" ]; then
     filename="$line"
  else
     echo "$line" >> $filename
  fi
  (( current_line = current_line + 1 ))
done < input_file

Cheers
ZB
 

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LEARN ABOUT OPENSOLARIS

scsnapshot

scsnapshot(1M)						  System Administration Commands					    scsnapshot(1M)

NAME

       scsnapshot - retrieve configuration data about resource groups, resource types, and resources, and generate a shell script

SYNOPSIS

       scsnapshot [-s scriptfile] [-o imagefile]

       scsnapshot [-s scriptfile] oldimage newimage

DESCRIPTION

       Note -

	 Beginning  with  the Sun Cluster 3.2 release, Sun Cluster software includes an object-oriented command set. Although Sun Cluster software
	 still supports the original command set, Sun Cluster procedural documentation uses only the object-oriented command set. For more  infor-
	 mation about the object-oriented command set, see the Intro(1CL) man page.

       The  scsnapshot	tool  retrieves  information  from  the Cluster Configuration Repository (CCR) about configuration data that is related to
       resource groups, resource types, and resources. The scsnapshot tool formats the configuration data as a shell script that can be  used  for
       the following purposes:

	   o	  To replicate configuration data on a cluster that has no configured resource groups, resource types, and resources

	   o	  To upgrade configuration data on a cluster that has configured resource groups, resource types, and resources

       The  scsnapshot tool retrieves configuration data only from the CCR. Other configuration data is ignored. The scsnapshot tool does not take
       into account the dynamic state of different resource groups, resource types, and resources.

       You can use this command only in the global zone.

OPTIONS

       The following options are supported by the scsnapshot tool. If you use an incorrect command option, the correct	way  to  use  the  command
       option is displayed.

       -s scriptfile

	   Stores the generated script in a file called scriptfile.

	   You can use this option only in the global zone.

	   If this option is not specified, the generated script is written to the standard output.

	   If  a  file	called	scriptfile already exists, it is renamed as scriptfile.old, and a new file called scriptfile is created. If a file
	   called scriptfile.old already exists, it is overwritten.

       -o imagefile

	   Stores the generated image file in a file called imagefile.

	   You can use this option only in the global zone.

	   If this option is not specified, an image file is not generated.

	   If a file called imagefile already exists, it is renamed as imagefile.old, and a new file called imagefile is created. If a file called
	   imagefile.old already exists, it is overwritten.

       oldimage

	   Specifies an image file that contains the old configuration data.

       newimage

	   Specifies an image file that contains the new configuration data.

EXTENDED DESCRIPTION

       The  output of the scsnapshot tool is an executable Bourne shell-based script. Before you run the script, you might need to manually change
       some properties to reflect the features of your host.

       The script compares the following characteristics of the local cluster to the cluster where the script was generated:

	   o	  Machine architecture

	   o	  Version of the Solaris Operating System

	   o	  Version of the Sun Cluster software

       If the characteristics are not the same, the script writes an error and ends. A message asks whether you want to rerun the script by  using
       the -f option. The -f option forces the script to run, despite any difference in characteristics.

       The  script  generated by the scsnapshot tool verifies that the Sun Cluster resource type exists on the local cluster. If the resource type
       does not exist on the local cluster, the script writes an error and ends. A message asks whether you want to install the  missing  resource
       type before you run the script again.

       To  run	a  script that is generated by the scsnapshot tool, you need solaris.cluster.resource.modify RBAC authorization. For more informa-
       tion, see the rbac(5) man page.

USAGE

       This section describes how you can use the scsnapshot tool.

   Retrieving Configuration Data for Resource Groups, Resource Types, and Resources
       scsnapshot  [-s scriptfile] [-o imagefile]

       Used without the -o option, the scsnapshot tool generates a script that creates configuration data for clusters that do	not  already  have
       configured resource groups, resource types, and resources. See Example 1.

       Used  with  the -o option, the scsnapshot tool produces an image file that represents the configuration data. The image file can be used in
       further invocations of the scsnapshot tool to upgrade configuration data on a cluster. See Example 2.

       To use the scsnapshot tool to retrieve configuration data, you need solaris.cluster.resource.read role-based access control  (RBAC)  autho-
       rization. For more information, see the rbac(5) man page.

       To track differences between versions of configuration data, store the image files in a source control system such as SCCS.

   Upgrading Configuration Data for Resource Groups, Resource Types, and Resources
       scsnapshot  [-s scriptfile]  oldimage newimage

       The scsnapshot tool generates a shell script that can be used to upgrade the configuration data that is contained in the oldimage file with
       the configuration data that is contained in the newimage file.

       To use the scsnapshot tool to upgrade configuration data, you do not need specific RBAC authorization.

EXAMPLES

       Example 1 To Generate a Shell Script That Retrieves Configuration Data for Resources Groups, Resource Types, and Resources

       The script that is generated in this example is called scriptfile.sh.

	 example% scsnapshot -s scriptfile.sh

       Example 2 To Generate a Shell Script That Retrieves Configuration Data and Stores an Image File

       The script that is generated in this example is called scriptfile.sh. The configuration data is stored in an image file called imagefile.

	 example% scsnapshot -s scriptfile.sh -o imagefile

       Example 3 To Generate a Shell Script That Upgrades Configuration Data on One Cluster With Configuration Data From Another Cluster

       This example creates a script that upgrades the configuration data on cluster1 to match the configuration data on cluster2. The	configura-
       tion  data for cluster1 is in a file called imagefile1, and the configuration data for cluster2 is in a file called imagefile2. The name of
       a shell script is not specified, so the generated script is written to the standard output.

	 example% scsnapshot imagefile1 imagefile2

EXIT STATUS

       The following exit status codes are returned:

       0		   The command completed successfully.

       nonzero		   An error occurred.

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWsczu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Intro(1CL), attributes(5), clconfiguration(5CL), rbac(5), rg_properties(5), rt_properties(5), r_properties(5)

Sun Cluster 3.2 						    22 Jun 2006 						    scsnapshot(1M)
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