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Full Discussion: SED/AWK file read & manipulation
Top Forums Shell Programming and Scripting SED/AWK file read & manipulation Post 302402837 by sal_tx on Wednesday 10th of March 2010 07:05:19 PM
Old 03-10-2010
SED/AWK file read & manipulation
I have large number of data files, close to 300 files, lets say all files are same kind and have extension .dat , each file have mulitple lines in it.

There is a unique line in each file containing string 'SERVER'. Right after this line there is another line which contain a string 'DIGIT=0', however this line 'DIGIT=0' appears at other places within the file. I need to know how I can change this 'DIGIT=0' to 'DIGIT=1' only where it appears after the line containing the string 'SERVER' and not at other places in the file. All the lines needs to be redirected to another file if the change is not possible on the original file.

Example of cat mydata.dat file:

APP1
APP3
DIGIT=2
DIGIT=1
DIGIT=0
DIGIT=0
APP3
APP2
SERVER
DIGIT=0 <----- I need to change this DIGIT=0 to DIGIT=1
DIGIT=1
APP2

----------------------------------------------------------
If I use sed then it changes DIGIT=0 at other places
for example: sed -e 's/DIGIT=0/DIGIT=1/' file > newfile

I am not that shell script guru so need help from you all, I think it should be simple but I will learn some thing new.

Thanks a lot.
 

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LEARN ABOUT REDHAT

xmtablist

XmTabList(library call) 												   XmTabList(library call)

NAME

       XmTabList -- Data type for a tab list

SYNOPSIS

       #include <Xm/Xm.h>
       XmTabList

DESCRIPTION

       XmTabList  is  the data type for a tab list. A tab list consists of tab stop list entries (XmTabs). Whenever a tab component is encountered
       while an XmString is being rendered, the origin of the next X draw depends on the next XmTab. If a tab stop would cause	text  to  overlap,
       the x position for the segment is reset to follow immediately after the end of the previous segment.

       Tab lists are specified in resource files with the following syntax:

       resource_spec: tab WHITESPACE [, WHITESPACE tab ]*

       The  resource  value  string consists of one or more tabs separated by commas. Each tab identifies the value of the tab, the unit type, and
       whether the offset is relative or absolute. For example:

       tab := float [ WHITESPACE units ]
       float := [ sign ] [[ DIGIT]*. ]DIGIT+
       sign := +

       where the presence or absence of sign indicates, respectively, a relative offset or an absolute offset. Note that negative tab  values  are
       not allowed. units indicates the unitType to use as described in the XmConvertUnits reference page.

       For example, the following specifies a tab list consisting of a one inch absolute tab followed by a one inch relative tab:

       *tabList: 1in, +1in

       For  resources  of type, dimension, or position, you can specify units as described in the XmNunitType resource of the XmGadget, XmManager,
       or XmPrimitive reference page.

RELATED

       Refer to the Motif Programmer's Guide for more information about tabs and tab  lists.   XmTabListCopy(3),  XmTabListFree(3),  XmTabListGet-
       Tab(3), XmTabListInsertTabs(3), XmTabListRemoveTabs(3), XmTabListReplacePositions(3), and XmTabListTabCount(3).

															   XmTabList(library call)
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