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Full Discussion: replacing multiple lines
Top Forums Shell Programming and Scripting replacing multiple lines Post 19337 by Jimbo on Tuesday 9th of April 2002 06:55:15 PM
Old 04-09-2002
The awk solution below first stores the low-high file into an array.
As it passes and prints the main file, it notes which "POINT_NAME" is passing by. As LOW_ALARM and HIGH_ALARM lines go by, awk rebuilds those lines if values for that POINT_NAME are in the array.

The BEGIN processing stores the low-high file using default white-space field separation. But it then sets the Field Separator to a double-quote sign for processing of the main file because it makes the coding cleaner and more precise. With this field separator, each tag and each value become a separate field, and thus a little cleaner to identify.

Just for testing, I add (UPD) to the end of lines that I rebuild. I do not test to see if the value actually changes, so the (UPD) just means that I rebuilt the line with a value from the low-high file, even though the value could have remained the same.

I did not rely on POINT_NAME always being the nth word in that header line. I scan the line to isolate it.
Code:
#!/bin/sh
awk 'BEGIN {
  rc=getline < "ajnabi.lohi"
  while (rc==1)
     {lo[$1]=$2
      hi[$1]=$3
      rc=getline < "ajnabi.lohi"}
  FS="\""
}
{ if ($1$2=="OBJECT=POINT")
    for (i=3;i<=NF;i++)
       if (match($i,"POINT_NAME="))
          {pname=$(i+1)
           gsub(" ","",pname)}
  if ($1=="LOW_ALARM_LIMIT_1_VALUE=")
     if (pname in lo)
        $0="LOW_ALARM_LIMIT_1_VALUE=\"" lo[pname] "\""  " (CHG)"
  if ($1=="HIGH_ALARM_LIMIT_1_VALUE=")
     if (pname in hi)
        $0="HIGH_ALARM_LIMIT_1_VALUE=\"" hi[pname] "\""  " (CHG)"
  print
}' ajnabi.txt > ajnabi.txtNEW
exit 0

Last edited by Jimbo; 04-11-2002 at 09:11 AM..
Jimbo
 

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LEARN ABOUT CENTOS

odbcinst

odbcinst(1)						       unixODBC manual pages						       odbcinst(1)

NAME

       odbcinst - An unixODBC tool for manipulating configuration files

SYNOPSIS

       odbcinst ACTION OBJECT OPTIONS

DESCRIPTION

       odbcinst  is  a	command line tool which has been created for allowing people who are developing the install scripts/RPMs for Drivers to be
       able to easily create/remove entries in odbc.ini and odbcinst.ini. This command line tool is a complement to the shared library of the same
       name (libodbcinst.so). This tool is a part of the odbcinst component of unixODBC.

OPTIONS

   ACTIONS
       -i     Install (add section to config file) new OBJECT.

       -u     Uninstall (remove section from config file) existing OBJECT.

       -q     Query the config files and print the options for specified OBJECT.

       -j     Prints current configuration of unixODBC, listing (among others) the paths to the configuration files.

       -c     Calls SQLCreateDataSource

       -m     Calls SQLManageDataSources

       --version
	      Prints program version and exits.

   OBJECTS
       -d     The ACTION affect drivers (and thus the odbcinst.ini configuration file).

       -s     The ACTION affect data sources (and thus the user or system odbc.ini configuration file).

   OPTIONS
       -f FILE
	      The FILE is template file, describing the configuration of installed OBJECT (only valid for the -i ACTION).

       -r     Same as the -f OPTION, only take the standard input as the template file.

       -n NAME
	      Specifies the NAME of the OBJECT.

       -v     Turn off verbose mode. This turns off all information, warning and error messages.

       -l     The specified data source is system-wide. Has any effect only with the -s OBJECT.

       -h     The specified data source is user-specific. Has any effect only with the -s OBJECT.

RETURN VALUES

       This command returns zero on success and non-zero value on failure.

FILES

       /etc/odbinst.ini
	      Configuration file containing all the database drivers specifications. See odbcinst.ini(5) for more details.

       /etc/odbc.ini
	      System-wide data sources specifications. See odbc.ini(5) for more details.

       $HOME/.odbc.ini
	      User-specific data sources specifications. See odbc.ini(5) for more details.

SEE ALSO

       odbcinst.ini(5), odbc.ini(5)

AUTHORS

       The  authors of unixODBC are Peter Harvey <pharvey@codebydesign.com> and Nick Gorham <nick@easysoft.com>. For the full list of contributors
       see the AUTHORS file.

COPYRIGHT

       unixODBC is licensed under the GNU Lesser General Public License. For details about the license, see the COPYING file.

version 2.3.1							  Wed 26 Jun 2013						       odbcinst(1)
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