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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