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.\" -*- nroff -*-
.\"
.\" Copyright (c) 1992 Drew Eckhardt (drew@cs.colorado.edu), March 28, 1992
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified by Michael Haardt (michael@moria.de)
.\" Modified Sat Jul 24 13:22:07 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified 21 Aug 1994 by Michael Chastain (mec@shell.portal.com):
.\" Referenced 'clone(2)'.
.\" Modified 10 June 1995 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 18 Apr 1996 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 1 Nov 1999 by Andries Brouwer (aeb@cwi.nl)
.\"
.TH FORK 2 "10/06/1995" "Linux 1.2.9" "Manual do Programador Linux"
.SH NOME
fork \- cria um processo filho
.SH SINOPSE
.B #include <unistd.h>
.sp
.B pid_t fork(void);
.SH DESCRIPTION
.B fork
cria um processo filho que diferencia-se a partir do processo pai somente em suas
PID e PPID, e np fato que a utilizao de recursos selecionada para 0.
Arquivos travados e sinais pendentes no so herdados.
.PP
No Linux,
.B fork
is implemented using copy-on-write pages, so the only penalty incurred by
fork is the time and memory required to duplicate the parent's page tables,
and to create a unique task structure for the child.
.SH "RETURN VALUE"
Em caso de sucesso, a PID do processo filho devolvida na thread pai
de execuo, e um 0 retornado na thread filha de execuo. Caso contrrio,
um \-1 ser retornado no contexo pai, e nenhum processo filho
ser criado, e
.I errno
ser selecionado adequadamente.
.SH ERROS
.TP
.B EAGAIN
.B fork
no pode alocar memria suficiente para copiar as tabelas de pginas pais e
alocar a estrutura de tarefa para o filho.
.TP
.B ENOMEM
.B fork
falhou ao alocar as estruturas do kernel necessrias porque a memria pequena.
.SH "DE ACORDO COM"
A chamada
.B fork
obedece SVr4, SVID, POSIX, X/OPEN, BSD 4.3.
.SH "VEJA TAMBM"
.BR clone (2),
.BR execve (2),
.BR vfork (2),
.BR wait (2)
.SH TRADUZIDO POR LDP-BR em 21/08/2000.
\&\fR\&\f(CWAndr L. Fassone Canova <lonelywolf@blv.com.br> (traduo)\fR
\&\fR\&\f(CWxxxxxxxxxxxxxxxxxxxxxxxxx <xxx@xxxxxx.xxx.xx> (reviso)\fR
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