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/* Read directory entries, 4 argument function. FreeBSD version.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef GETDIRENTRIES
# define GETDIRENTRIES getdirentries
# define OFF_T off_t
#endif
#include <dirent.h>
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <sysdep.h>
#if 1
/* Use the 4-argument system call. */
extern int __syscall_getdirentries (int fd, char *buf, unsigned int nbytes,
long *basep);
/* Read directory entries from FD into BUF, reading at most NBYTES.
Reading starts at offset *BASEP, and *BASEP is updated with the new
position after reading. Returns the number of bytes read; zero when at
end of directory; or -1 for errors. */
/* FIXME: This is not what this function does. It starts reading at the
current position of FD, not at *BASEP. */
ssize_t
GETDIRENTRIES (int fd, char *buf, size_t nbytes, OFF_T *basep)
{
/* On 32-bit platforms, the system call differs from this function because
it takes a 'long *', not an 'OFF_T *'. On 64-bit platforms, the system
call differs from this function because it takes an 'unsigned int', not
a 'size_t'. */
unsigned int nbytes32;
nbytes32 = nbytes;
if (nbytes32 == nbytes)
{
long base;
int result = __syscall_getdirentries (fd, buf, nbytes32, &base);
if (result >= 0 && basep != NULL)
*basep = base;
return result;
}
else
{
/* NBYTES is too large. */
__set_errno (EINVAL);
return -1;
}
}
#else
/* Use the 3-argument system call. */
extern int __syscall_getdents (int fd, char *buf, size_t nbytes);
/* Read directory entries from FD into BUF, reading at most NBYTES.
Reading starts at offset *BASEP, and *BASEP is updated with the new
position after reading. Returns the number of bytes read; zero when at
end of directory; or -1 for errors. */
/* FIXME: This is not what this function does. It starts reading at the
current position of FD, not at *BASEP. */
ssize_t
GETDIRENTRIES (int fd, char *buf, size_t nbytes, OFF_T *basep)
{
OFF_T base = 0;
ssize_t result;
if (basep)
base = __lseek (fd, (off_t) 0, SEEK_CUR);
result = __syscall_getdents (fd, buf, nbytes);
if (basep && result >= 0)
*basep = base;
return result;
}
#endif
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