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From: lr@quux.apana.org.au (Lachlan Roche)
Newsgroups: comp.lang.ada,comp.lang.c,comp.unix.programmer,comp.unix.questions
Subject: Re: Filename comparison ... HELP NEEDED!
Followup-To: comp.unix.programmer
Date: 12 Dec 1994 07:50:57 GMT
Organization: We don't need no steenking organisation.
Distribution: world
Message-ID: <LR.94Dec12175057@quux.apana.org.au>
References: <3bn13h$jmo@speedy.cci.de>
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In-reply-to: jewell@cci.de's message of 2 Dec 1994 11:40:33 GMT
Xref: bga.com comp.lang.ada:8519 comp.lang.c:34300 comp.unix.programmer:9762
 comp.unix.questions:17762
Date: 1994-12-12T07:50:57+00:00
List-Id: <comp.lang.ada>


In article <3bn13h$jmo@speedy.cci.de> jewell@cci.de (Nigel Jewell) writes:
>Does anybody know of an good solution to seeing if two filenames given actually
>point at the same file in the file system?  (Probably a solution in C).

The canonical method is inode comparison. If the inodes are the same, its
the same file.

eg.

/* do these two names refer to a single file? */
int is_alias( char *name1, char *name2 )
{
  struct stat stat1, stat1;

  stat( name1, &stat1 )
  stat( name2, &stat2 )

  return stat1.st_ino == stat2.st_ino;
}

--
Lachlan Roche	... in Brisbane, Australia ...		lr@quux.apana.org.au