Date: Thu, 18 Nov 1999 17:23:15 -0500 From: Greg Lehey <grog@mojave.sitaranetworks.com> To: rover@lglobus.ru, freebsd-questions@FreeBSD.ORG Subject: Re: Is there correct way for program to read from itself? Message-ID: <19991118172315.02758@mojave.sitaranetworks.com> In-Reply-To: <19991119002759.B63288@fly.lglobus.ru>; from Oleg V. Volkov on Fri, Nov 19, 1999 at 12:27:59AM %2B0300 References: <19991118065815.B89755@fly.lglobus.ru> <19991118102421.09370@mojave.sitaranetworks.com> <19991118223426.A62913@fly.lglobus.ru> <19991118152324.37840@mojave.sitaranetworks.com> <19991118232846.A63288@fly.lglobus.ru> <19991118154736.22915@mojave.sitaranetworks.com> <19991119002759.B63288@fly.lglobus.ru>
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On Friday, 19 November 1999 at 0:27:59 +0300, Oleg V. Volkov wrote:
> On Thu, Nov 18, 1999 at 03:47:36PM -0500, Greg Lehey wrote:
>> On Thursday, 18 November 1999 at 23:28:46 +0300, Oleg V. Volkov wrote:
>>> On Thu, Nov 18, 1999 at 03:23:24PM -0500, Greg Lehey wrote:
>>>>>>> Is there correct way for porgram to read from it's own file?
>>>>>> I'm not sure I understand. What do you mean by "it's own file"?
>>>>>> If you mean the object file, sure. Where's the problem?
>>>>> I mean this situation:
>>>>> I have some program /usr/local/bin/someprog. Is there a way for it
>>>>> to read from itself (from /usr/local/bin/someprog).
>>>> Sure, that's what I said. What do you expect to find?
>>> Could you give me short example?
>> OK, here's copyme.c:
>>
>> #include <fcntl.h>
>> #include <stdio.h>
>> #include <string.h>
>> #include <sys/stat.h>
>>
>> extern int errno;
>>
>> main (int argc, char *argv [])
>> {
> [skip]
>> }
>>
>> And here's what happens when I run it:
>>
>> $ copyme foo
>> $ cmp copyme foo
>> $ ls -l copyme foo
>> -rwxrwxrwx 1 grog eng 4197 Nov 18 15:44 copyme
>> -r-------- 1 grog eng 4197 Nov 18 15:44 foo
>> $
>>
>> Not much use, is it? Was that your class assignment?
>
> Heh, and now put it into PATH...
> and
>
> $ copyme foo
> 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
it?
Greg
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