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os.write and file descriptor

Grant Edwards grante at visi.com
Tue Feb 4 17:20:55 EST 2003 
In article <3e403b70$0$33320$a1866201 at newsreader.visi.com>, Grant Edwards wrote:
> In article <mailman.1044394889.16825.python-list at python.org>, Inyeol Lee wrote:
> 
>> I'm writing a program which writes to file descriptor 3.
>> I've tried os.write() but it generates exception;
>> 
>>>>> import os
>>>>> os.write(3, "hello")
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in ?
>> OSError: [Errno 9] Bad file number
> 
> What happens if you use 1 or 2 instead of 3?
> 
> Why do you think that 3 should be valid?
> 
>> I've also tried equivalent C code, and it works fine;
> 
> It doesn't for me:
> 
> $cat testit.c
> #include <stdio.h>
> #include <unistd.h>
> #include <string>

That Should be:
           <string.h>

Not sure how I got a broken version of the file in the
posting... :/

Anyway, it still produces the "correct" error:
           
> $ ./testit
> write: Bad file descriptor
> 
>> Is the usage of os.write() different from C? Am I missing
>> something?
> 
> No.

-- 
Grant Edwards                   grante             Yow!  Finally, Zippy
                                  at               drives his 1958 RAMBLER
                               visi.com            METROPOLITAN into the
                                                   faculty dining room.
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