Date: Fri, 19 Nov 1999 11:37:20 -0500 From: Greg Lehey <grog@mojave.sitaranetworks.com> To: Jonathon McKitrick <jcm@dogma.freebsd-uk.eu.org> Cc: rover@lglobus.ru, freebsd-questions@freebsd.org Subject: Re: Is there correct way for program to read from itself? Message-ID: <19991119113720.28959@mojave.sitaranetworks.com> In-Reply-To: <Pine.BSF.4.02A.9911191615380.22999-100000@dogma.freebsd-uk.eu.org>; from Jonathon McKitrick on Fri, Nov 19, 1999 at 04:16:49PM %2B0000 References: <19991119111026.11577@mojave.sitaranetworks.com> <Pine.BSF.4.02A.9911191615380.22999-100000@dogma.freebsd-uk.eu.org>
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On Friday, 19 November 1999 at 16:16:49 +0000, Jonathon McKitrick wrote:
> On Fri, 19 Nov 1999, Greg Lehey wrote:
>>>>> Can't open copyme: No such file or directory
>>>>> Everything is not that easy.
>>>> That wasn't the question. But it can be fixed. How about you doing
>
> What happened here? Does he need a rehash command? WHy can't it find
> copyme? (I'm just trying to learn something from all of this)
No, he didn't do anything wrong, except to expect me to write a
perfect program instead of an example. The relevant part of the code
is:
main (int argc, char *argv [])
{
int me = open (argv [0], O_RDONLY);
argv [0] gets set to the name of the program (copyme). If I start it
via PATH, it's still just "copyme". open(2) will fail if it doesn't
find it in the current directory, and worse, if it *does* find a file
of the same name, it will open it instead of the correct file.
Greg
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