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Full Discussion: Bash script questions for gurus
Top Forums Shell Programming and Scripting Bash script questions for gurus Post 302338580 by mayi on Tuesday 28th of July 2009 10:08:39 AM
Old 07-28-2009
Error Bash script questions for gurus
guys,

I need a steer in the right direction for this issue. it would be great if anyone of you can help me out.

i have a textfile where i want to swap the lines based on the user input.

The textfile is looks like the

#file 1 name
TB
#file 1 ID
1000
#
#file for ID1 system1
AB_12_TB_3000
#
#file for ID1 system2
BC_12_TB_3000
#file 2 name
CO
#file 2 ID
5000
#
#file for ID2 system1
AB_12_CO_3000
#
#file for ID2 system2
BC_12_CO_3000

if the user enters CO then i want CO,5000 and the files should be file 1 and the TB should be file 2. basically interchanging it and making the user entry to be on top and putting the top one to be on the placeholder of file2.here i have mentioned only 2 files, but i am dealing with more than 2 in my files.

The code i have written so far is like this. it works except the ID part.

THE FILENAME IS ROCK.IN i.e that why u see rock.in at the end.

MY QUESTION WOULD BE

1)IS THERE A MORE ROBUST AND EASIER WAY TO DO THIS.

2)MY LAST SED STATEMENT IS NOT CHANGING IT PROPERLY

Code:
#!/bin/bash


user_rock=$(grep -hi 'tb' rock.in)

val=$(grep -A 3 -m 1 -hi 'tb' rock.in)



rock1=$(sed -n -e '/file 1/ {n;p;}' rock.in)


D1=`echo $rock1 | cut -d ' ' -f3`
r_name=`echo $D1| cut -d '_' -f3`

D2=`echo $rock1 | cut -d ' ' -f2`

D3=`echo $val | cut -d ' ' -f5`
D6=`echo $val | cut -d ' ' -f3`

D4=`echo $user_rock | cut -d ' ' -f3`
u_name=`echo $D4| cut -d '_' -f3`

sed -i "s/$u_name/ch/gi" rock.in

sed -i "s/$r_name/$u_name/gi" rock.in

sed -i "s/ch/$r_name/gi" rock.in

sed -i "/file 1 ID/,/{n;p;}/s/$D2/$D3/g" rock.in

sed -i "/file $D6 ID/,/{n;p;}/s/$D3/$D2/g" rock.in


#echo $D3 $D2

exit 0

I WOULD APPRECIATE ANY IDEAS OR SUGGESTIONS. THANKS AGAIN
Last edited by mayi; 07-28-2009 at 12:26 PM.. Reason: code tags
 

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LEARN ABOUT HPUX

checkbashisms

CHECKBASHISMS(1)					      General Commands Manual						  CHECKBASHISMS(1)

NAME

       checkbashisms - check for bashisms in /bin/sh scripts

SYNOPSIS

       checkbashisms script ...
       checkbashisms --help|--version

DESCRIPTION

       checkbashisms, based on one of the checks from the lintian system, performs basic checks on /bin/sh shell scripts for the possible presence
       of bashisms.  It takes the names of the shell scripts on the command line, and outputs warnings if possible bashisms are detected.

       Note that the definition of a bashism in this context roughly equates to "a shell feature that is not required to be supported  by  POSIX";
       this means that some issues flagged may be permitted under optional sections of POSIX, such as XSI or User Portability.

       In  cases  where  POSIX	and  Debian  Policy  disagree, checkbashisms by default allows extensions permitted by Policy but may also provide
       options for stricter checking.

OPTIONS

       --help, -h
	      Show a summary of options.

       --newline, -n
	      Check for "echo -n" usage (non POSIX but required by Debian Policy 10.4.)

       --posix, -p
	      Check for issues which are non POSIX but required to be supported by Debian Policy 10.4 (implies -n).

       --force, -f
	      Force each script to be checked, even if it would normally not be (for instance, it has a bash or non POSIX shell shebang or appears
	      to be a shell wrapper).

       --extra, -x
	      Highlight lines which, whilst they do not contain bashisms, may be useful in determining whether a particular issue is a false posi-
	      tive which may be ignored.  For example, the use of "$BASH_ENV" may be preceded by checking whether "$BASH" is set.

       --version, -v
	      Show version and copyright information.

EXIT VALUES

       The exit value will be 0 if no possible bashisms or other problems were detected.  Otherwise it will be the sum of the following error val-
       ues:

       1      A possible bashism was detected.

       2      A file was skipped for some reason, for example, because it was unreadable or not found.	The warning message will give details.

SEE ALSO

       lintian(1).

AUTHOR

       checkbashisms  was originally written as a shell script by Yann Dirson <dirson@debian.org> and rewritten in Perl with many more features by
       Julian Gilbey <jdg@debian.org>.

DEBIAN
								 Debian Utilities						  CHECKBASHISMS(1)
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