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.\" Copyright (C) 2002, Michael Kerrisk
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.\" Modified 31 Jan 2002, Michael Kerrisk <mtk16@ext.canterbury.ac.nz>
.\"	Added description of mmap2
.\"
.\" Traducido por Miguel Pérez Ibars <mpi79470@alu.um.es> el 5-julio-2004
.\"
.TH MMAP2 2 "31 enero 2002" "Linux 2.3.31" "Manual del Programador de Linux"
.SH NOMBRE
mmap2 \- ubica ficheros o dispositivos en memoria
.SH SINOPSIS
.B #include <sys/mman.h>
.br
.B #include <syscall.h>
.sp
.BI "_syscall6(void *, " start ", size_t, " length ", int, " prot ,
.BI "int, " flags ", int, " fd ", off_t, " pgoffset );
.sp
.BI "void * mmap2(void *" start ", size_t " length ", int " prot ,
.BI "int " flags ", int " fd ", off_t " pgoffset );
.sp
.B #endif
.SH DESCRIPCIÓN
La función
.B mmap2
opera exactamente de la misma manera que
.BR mmap (2),
salvo que el último argumento especifica el desplazamiento dentro del
fichero en unidades del tamaño de página del sistema (en lugar de bytes).
Ésto permite a las aplicaciones que usan un off_t de 32-bit ubicar
ficheros más grandes (típicamente hasta 2^44 bytes).
.SH OBSERVACIONES
La función
.B mmap2
está disponible desde la versión 2.3.31 de Linux.
Es específica de Linux, y debería ser evitada en aplicaciones portables.
Véase también la función
.I mmap64()
que es parte del LFS (Large File Summit).
.SH "VÉASE TAMBIÉN"
.BR getpagesize (2),
.BR mmap (2),
.BR mremap (2),
.BR msync (2),
.BR shm_open (2)