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Full Discussion: File handling in bash shell scripting
Top Forums UNIX for Dummies Questions & Answers File handling in bash shell scripting Post 302495221 by reeta_shri on Wednesday 9th of February 2011 04:53:40 PM
Old 02-09-2011
File handling in bash shell scripting
i am new to shell scripting and stuck at one place in my program.

i am reading data from one structured file and extracting some data from particular lines and then writing into the output file. In that reading input file line by line from while loop.

Code:
while read line 
 do
   rectype=line | cut c-1-2
   case rectype in
         10)
             header
          ;;
         20)
             continue
         ;;
         30)
           X=line | cut c-1-6
            data1 X

         ;;
         31)
            data2
          ;;
         32)
            data3
          ;;
         88)
            continue
         ;;
         89)
            trailer
         ;;
         *)
            echo "error in the file"
            exit 1 #exit script with error
         ;;
      esac
 done < input.txt

inside case i am calling different functions and writing into the output file, while i am extracting values with the help of cut it will go to the next line and loop continue there until end of file but i want to extract text at particular line and again go to the next line loop and then check the case.
thanks in advance.
Last edited by radoulov; 02-09-2011 at 06:14 PM.. Reason: Code tags, please!
 

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LEARN ABOUT DEBIAN

gpm.conf

GPM.CONF(5)						      BSD File Formats Manual						       GPM.CONF(5)

NAME

     gpm.conf -- startup configuration file for gpm

DESCRIPTION

     gpm.conf specifies options to be passed to the gpm daemon at start time.  It is parsed by the init script, rather than by gpm itself.  It
     comprises variable assignments in Bourne shell syntax: variable=value (with no extra spaces; to embed spaces or other shell metacharacters in
     values, use quotes as in shell scripting).  Blank lines and lines beginning with a hash ("#") are ignored.

     Settings are implemented by setting flags on the gpm command line; these are documented in gpm(8).  The following variable names are speci-
     fied:

     device	   Specifies the device file for your primary mouse.  This sets -m.

     type	   Specifies the protocol for your primary mouse.  This sets -t.

     device2, type2
		   The same as device and type, but for your secondary mouse.  These set -m and -t after passing -M.  If either of these are
		   defined, both must be.

     responsiveness
		   Specifies the responsiveness for your primary mouse.  This sets -r.

     sample_rate   Specifies the sample rate for your primary mouse.  This sets -s.

     repeat_type   Enables the gpm repeater and sets the repeater protocol, using the -R flag.	Repeat type none or an empty value will disable
		   the repeater.

     append	   Any options specified here are appended to the gpm command line.  If you use multiple options, you will need to enclose the
		   value in quotes ("").

EXAMPLES

     A simple gpm.conf file for a PS/2 mouse whose protocol should be autodetected, and which should be repeated in /dev/gpmdata as a serial Mi-
     crosoft Intellimouse:

	   # Sample gpm.conf

	   device=/dev/psaux
	   type=autops2
	   repeat_type=ms3

     This will cause the daemon to be started as gpm -m /dev/psaux -t autops2 -Rms3.

FILES

     /etc/gpm.conf

SEE ALSO

     gpm(8), dpkg-reconfigure(8).  dpkg-reconfigure gpm can be used to generate and update the gpm.conf file automatically.

Debian 3.0							  January 5, 2005							Debian 3.0
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