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Top Forums Shell Programming and Scripting Comparing two files and appending only missing lines. Post 302185945 by Karthick333031 on Wednesday 16th of April 2008 06:48:02 AM
Old 04-16-2008
Comparing two files and appending only missing lines.

Hi All,
I am a newbie to Shell scripting. Please help me with the Following problem,

1. I have two files with the same name in different locations in the same machine.
Eg: /root/testfolder/a ---- location 1
/tmp/testfolder/a ----- location 2

2. I want to compare the files in location 1 and location 2.
Eg: diff /root/testfolder/a /tmp/testfolder/a
(Please suggest the best way using diff )

3. I must append only the lines missing in location 1(i.e. /root/testfolder/a) without losing any content of location 1.

Eg:
File in location 1Smilie/root/testfolder/a)

Added line in Location 1
This is a test Script
But i am stuck.Please help
This is Added line to LOCATION 1(/root/testfolder/a)

File in location 2Smilie/tmp/testfolder/a)
Added Line in the Location 2 (/tmp/testfolder/a)
This is a test Script
But i am stuck.Please help
This is added line for testing in LOCATION 2(/tmp/testfolder/a)


Executing diff command:

diff /root/testfolder/a /tmp/testfolder/a

Say output of the diff command looks like this:

1c1
< Added line in Location 1 (/root/testfolder/a)
---
> Added Line in the Location 2 (/tmp/testfolder/a)
4c4
< This is Added line to LOCATION 1(/root/testfolder/a)
---
> This is added line for testing in LOCATION 2(/tmp/testfolder/a)


Here,

I am concerned only to append those lines starting with ">" to the correct lines of /root/testfolder/a

Expected result in /root/testfolder/a

Added Line in the Location 2 (/tmp/testfolder/a)
Added line in Location 1
This is a test Script
This is added line for testing in LOCATION 2(/tmp/testfolder/a)
But i am stuck.Please help


Please help me develop a shell script to solve the above posted problem.
Thanks in advance
Karthick.
 

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DEBUG_PRINT_BACKTRACE(3)						 1						  DEBUG_PRINT_BACKTRACE(3)

debug_print_backtrace - Prints a backtrace

SYNOPSIS
void debug_print_backtrace ([int $options], [int $limit]) DESCRIPTION
debug_print_backtrace(3) prints a PHP backtrace. It prints the function calls, included/required files and eval(3)ed stuff. PARAMETERS
o $options - As of 5.3.6, this parameter is a bitmask for the following options: debug_print_backtrace(3) options +----------------------------+---------------------------------------------------+ |DEBUG_BACKTRACE_IGNORE_ARGS | | | | | | | Whether or not to omit the "args" index, and | | | thus all the function/method arguments, to save | | | memory. | | | | +----------------------------+---------------------------------------------------+ o $limit - As of 5.4.0, this parameter can be used to limit the number of stack frames printed. By default ($limit= 0) it prints all stack frames. RETURN VALUES
No value is returned. CHANGELOG
+--------+-----------------------------------------+ |Version | | | | | | | Description | | | | +--------+-----------------------------------------+ | 5.4.0 | | | | | | | Added the optional parameter $limit. | | | | | 5.3.6 | | | | | | | Added the optional parameter $options. | | | | +--------+-----------------------------------------+ EXAMPLES
Example #1 debug_print_backtrace(3) example <?php // include.php file function a() { b(); } function b() { c(); } function c(){ debug_print_backtrace(); } a(); ?> <?php // test.php file // this is the file you should run include 'include.php'; ?> The above example will output something similar to: #0 c() called at [/tmp/include.php:10] #1 b() called at [/tmp/include.php:6] #2 a() called at [/tmp/include.php:17] #3 include(/tmp/include.php) called at [/tmp/test.php:3] SEE ALSO
debug_backtrace(3). PHP Documentation Group DEBUG_PRINT_BACKTRACE(3)
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