Date: 31 Jan 2002 16:11:44 +0000 From: Wayne Pascoe <freebsd@molemanarmy.com> To: adrian kok <adriankok2000@yahoo.com.hk> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: compare two files Message-ID: <m2u1t2sdof.fsf@set.ehsbrann.com> In-Reply-To: <20020131155013.82668.qmail@web21209.mail.yahoo.com> References: <20020131155013.82668.qmail@web21209.mail.yahoo.com>
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adrian kok <adriankok2000@yahoo.com.hk> writes:
> I would like to know how to write script or program to
> compare two file
>
> two files: file1 and file2
>
> check data of file1 whether exists in file2
>
> if not
>
> write this data in file1 or output to file
>
> #!/bin/sh
> $lista=fopen("a.txt", "r");
> $listb=fopen("b.txt", "r");
>
> while(!feof($lista)) {
> $dmbuffer = fgets ($lista);
> grep $dmbuffer $listb > diff;
> }
I think that using diff might do what you want.
diff file1 file2
this will print the lines in each file that differ to standard
output. This can be redirected to a file by doing
diff file1 file2 > differences
HTH
--
- Wayne Pascoe
| Everything to excess. To enjoy the
freebsd@molemanarmy.com | flavor of life, take big bites. Moderation
http://www.molemanarmy.com | is for monks. - Robert Heinlein
|
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