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.\" Copyright (C) 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" References consulted:
.\" Linux libc source code
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\" Modified Sat Jul 24 16:09:49 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified 11 June 1995 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 22 July 1996 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 25 July 1997 by Nicols Lichtmaier <nick@debian.org>
.\"
.\" Translated into Spanish Thu Mar 5 17:26:31 CET 1998 by Gerardo
.\" Aburruzaga Garca <gerardo.aburruzaga@uca.es>
.\"
.TH READDIR 3 "25 Julio 1997" "Linux" "Manual del Programador de Linux"
.SH NOMBRE
readdir \- lee un directorio
.SH SINOPSIS
.nf
.B #include <sys/types.h>
.sp
.B #include <dirent.h>
.sp
.BI "struct dirent *readdir(DIR *" dir );
.fi
.SH DESCRIPCIN
La funcin \fBreaddir()\fP devuelve un puntero a una estructura dirent
que representa la siguiente entrada de directorio en el flujo de
directorio al que apunte \fIdir\fP. Devuelve NULL cuando alcanza el
fin-de-fichero o si hay un error.
.PP
Los datos devueltos por \fBreaddir()\fP son sobreescritos por
subsiguientes llamadas a \fBreaddir()\fP para el mismo flujo de directorio.
.PP
La estructura
.I dirent
se define como sigue:
.sp
.RS
.nf
.ta 8n 16n 32n
struct dirent {
long d_ino; /* nmero i-nodo */
off_t d_off; /* despl. al siguiente dirent */
unsigned short d_reclen; /* long. de este registro */
unsigned char d_type; /* tipo de fichero */
char d_name[256]; /* nombre del fichero */
};
.ta
.fi
.RE
.PP
Segn POSIX, la estructura
.I dirent
contiene un campo
.I "char d_name[]"
de tamao no especificado, con
.B NAME_MAX
caracteres como mucho precediendo al carcter cero terminador.
El empleo de otros campos perjudicar la transportabilidad de sus programas.
.SH FALLOS
El campo
.I d_type
no se implementa a partir de libc6 2.0.4 y siempre devolver 0 (desconocido).
.SH "VALOR DEVUELTO"
La funcin \fBreaddir()\fP devuelve un puntero a una estructura
dirent, o NULL si ocurre un error o se alcanza el fin-de-fichero.
.SH "ERRORES"
.TP
.B EBADF
Descriptor de flujo de directorio invlido \fIdir\fP.
.SH "CONFORME A"
SVID 3, POSIX, BSD 4.3
.SH "VASE TAMBIN"
.BR read "(2), " opendir "(3), " closedir "(3), " rewinddir (3),
.BR seekdir "(3), " telldir "(3), " scandir (3)
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