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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (c) 1993 Michael Haardt
.\" (u31b3hs@pool.informatik.rwth-aachen.de),
.\" Fri Apr 2 11:32:09 MET DST 1993
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 2 of
.\" the License, or (at your option) any later version.
.\"
.\" The GNU General Public License's references to "object code"
.\" and "executables" are to be interpreted as the output of any
.\" document formatting or typesetting system, including
.\" intermediate and printed output.
.\"
.\" This manual is distributed in the hope that it will be useful,
.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
.\" GNU General Public License for more details.
.\"
.\" You should have received a copy of the GNU General Public
.\" License along with this manual; if not, write to the Free
.\" Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
.\" USA.
.\"
.\" Modified Wed Jul 21 19:52:58 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Sun Aug 21 17:40:38 1994 by Rik Faith (faith@cs.unc.edu)
.\" Translated 15 Dec 1995 Miguel A. Sepulveda (miguel@typhoon.harvard.edu)
.\" Modified 30 Jun 1996 Miguel A. Sepulveda (angel@vivaldi.princeton.edu)
.\" Modified 23 Sep 1997 by Nicols Lichtmaier <nick@debian.org>
.\"
.TH BRK 2 "30 Junio 1996" "Linux 0.99.11" "Manual del Programador Linux"
.SH NOMBRE
brk, sbrk \- cambia el tamao del segmento de datos
.SH SINOPSIS
.B #include <unistd.h>
.sp
.BI "int brk(void *" final_del_segemento_de_datos );
.br
.BI "void *sbrk(ptrdiff_t " incremento );
.SH DESCRIPCIN
.B brk
asigna el final del segmento de dato al valor especificado por
.IR final_del_segemento_de_datos .
.I final_del_segemento_de_datos
debe ser mayor que el final del segmento de texto y debe estar 16Kb
antes del final de la pila (stack).
.sp
.B sbrk
aumenta el espacio de datos del programa
.I incremento
bytes.
.B sbrk
no es realmente una llamada del sistema, es simplemente un envoltorio
de la biblioteca de C.
.SH "VALOR REGRESADO"
En caso de xito,
.B brk
vuelve cero, y
.B sbrk
da un puntero al principio de una nueva rea. En caso de error la llamada
regresa \-1, y
.I errno
es asignada con el valor
.BR ENOMEM .
.SH "CONFORMA CON"
BSD 4.3
.BR brk " y " sbrk
no estn definidas en el estndar C y estn excludas deliberadamente del
estndar POSIX.1 (vanse los prrafos B.1.1.1.3 y B.8.3.3).
.SH "VASE TAMBIN"
.BR execve "(2), " getrlimit "(2), " malloc "(3), " end (3)
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