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Full Discussion: Help regarding files
Top Forums Shell Programming and Scripting Help regarding files Post 302350628 by reddybs on Friday 4th of September 2009 12:43:25 PM
Old 09-04-2009
Thanks for the replies.
@anchal: The code gets the diff of lines(say n lines) but tail will not print all the n lines but it will print the nth line. Rest of the things are good and i am working on this.

@sam: Many thanks for the reply. I feel some editing work needs to be done after the diff command. However, i will try to implement this too.

Cheers,
Sai

---------- Post updated at 08:43 AM ---------- Previous update was at 07:07 AM ----------

Hi anchal...

I have modified your code and tried to get through this - by the end of script i will be with a file which contains only modified lines.

Code:
#!/bin/bash
tmpfile=file.tmp
sourcefile=file.main
tmpfile1=file1.tmp
 
rm -f $tmpfile1
 
lc_main=$(wc -l file.main | awk '{print $1}')
lc_tmp=$(wc -l file.tmp | awk '{print $1}')
 
lc_diff=$(echo "$lc_main-$lc_tmp" | bc)
lc_diff1=$(echo "$lc_main-$lc_diff" | bc)
 
#lc_mdiff=$(echo "$lc_diff+$lc_diff1" | bc)
 
i=1
sed "${i},${lc_diff1}d" $sourcefile >> $tmpfile
sed "${i},${lc_diff1}d" $sourcefile > $tmpfile1
 
#tail +${lc_diff} $sourcefile >> $tmpfile

From the above code, for the each run of the script there will be a file(tmpfile1 in script) with ONLY latest updates.
I'd be happy to receive some more ideas regarding this, which would make my task more easier and perfect.

Looking forward for more help!!!
Sai
 

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LEARN ABOUT REDHAT

hqx2bin

MEGATRON(1)						      General Commands Manual						       MEGATRON(1)

NAME

       megatron, unhex, unbin, unsingle, hqx2bin, single2bin, macbinary - Macintosh file format transformer

SYNOPSIS

       megatron [ sourcefile...  ]

       unbin [ sourcefile...  ]

       unhex [ sourcefile...  ]

       unsingle [ sourcefile...  ]

       hqx2bin [ sourcefile...	]

       single2bin [ sourcefile...  ]

       macbinary [ sourcefile...  ]

DESCRIPTION

       megatron  is  used to transform files from BinHex, MacBinary, AppleSingle, or netatalk style AppleDouble formats into MacBinary or netatalk
       style AppleDouble formats.  The netatalk style AppleDouble format is the file format used by  afpd,  the  netatalk  Apple  Filing  Protocol
       (AppleShare)  server.   BinHex,	MacBinary, and AppleSingle are commonly used formats for transferring Macintosh files between machines via
       email or file transfer protocols.  megatron uses its name to determine what type of tranformation is being asked of it.

       If megatron is called as unhex, unbin, or unsingle, it tries to convert file(s) from BinHex, MacBinary,	or  AppleSingle  into  AppleDouble
       format.	 BinHex is the format most often used to send Macintosh files by e-mail.  Usually these files have an extension of ".hqx".  MacBi-
       nary is the format most often used by terminal emulators "on the fly" when transferring Macintosh files in binary  mode.   MacBinary  files
       often have an extension of ".bin".  Some Macintosh LAN-based email packages use uuencoded AppleSingle format to "attach" or "enclose" files
       in email.  AppleSingle files don't have a standard filename extension.

       If megatron is called as hqx2bin, single2bin, or macbinary, it will try to convert the file(s) from  BinHex,  AppleSingle,  or  AppleDouble
       into  MacBinary.   This last translation may be useful in moving Macintosh files from your afpd server to some other machine when you can't
       copy them from the server using a Macintosh for some reason.

       If megatron is called with any other name, it uses the default translation, namely unhex.

       If no source file is given, or if sourcefile is `-', and if the conversion is from a BinHex or MacBinary  file,	megatron  will	read  from
       standard input.

       The  filename  used to store any output file is the filename that is encoded in the source file.  MacBinary files are created with a ".bin"
       extension.  In the case of conflicts, the old file is overwritten!

SEE ALSO

       afpd(8)

netatalk 1.2							    8 Jan 1992							       MEGATRON(1)
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