[Fwd: libc_r, libthr & konsole news]

[Daniel C. Sobral]

I'm at loss at how dup2() works, exactly. It seems that libc_r overrides 
it, but libthr doesn't. But I don't understand the process well, because 
I'm don't understand the syscall glue.

-------- Original Message --------
Subject: libc_r, libthr & konsole news
Date: Tue, 03 Jun 2003 09:47:43 -0300
From: Daniel C. Sobral <dcs at tcoip.com.br>
To: CURRENT <freebsd-current at freebsd.org>

Alas, I found *what* is going on differently depending on the library used.

With libc_r, dup2() gets called and fails, preventing execution of
konsole_grantpty, with libthr things work, konsole_grantpty gets called
and... ttyname fails. :-)

Now, dup2() implementation seems to differ between libc_r and libthr
(though I'm open to be shown that is not so -- I don't quite understand
how things work here).

I have verified that by preventing execution of
/usr/local/bin/konsole_grantpty (by the simple artifice of renaming it),
the problem DOES NOT HAPPEN.

Now... to find out what's different between both dup2() implementations...

-- 
Daniel C. Sobral                   (8-DCS)
Gerencia de Operacoes
Divisao de Comunicacao de Dados
Coordenacao de Seguranca
VIVO Centro Oeste Norte
Fones: 55-61-313-7654/Cel: 55-61-9618-0904
E-mail: Daniel.Capo at tco.net.br
         Daniel.Sobral at tcoip.com.br
         dcs at tcoip.com.br

Outros:
	dcs at newsguy.com
	dcs at freebsd.org
	capo at notorious.bsdconspiracy.net

"I think sex is better than logic, but I can't prove it."

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-- 
Daniel C. Sobral                   (8-DCS)
Gerencia de Operacoes
Divisao de Comunicacao de Dados
Coordenacao de Seguranca
VIVO Centro Oeste Norte
Fones: 55-61-313-7654/Cel: 55-61-9618-0904
E-mail: Daniel.Capo at tco.net.br
         Daniel.Sobral at tcoip.com.br
         dcs at tcoip.com.br

Outros:
	dcs at newsguy.com
	dcs at freebsd.org
	capo at notorious.bsdconspiracy.net

Hate the sin and love the sinner.
		-- Mahatma Gandhi