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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 1997
* Sleepycat Software. All rights reserved.
*/
#include "config.h"
#ifndef lint
static const char sccsid[] = "@(#)db_os_rw.c 10.4 (Sleepycat) 6/28/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
#include <sys/types.h>
#include <errno.h>
#include <unistd.h>
#endif
#include "db_int.h"
#include "os_ext.h"
/*
* __db_read --
* Read from a file handle.
*
* PUBLIC: int __db_read __P((int, void *, size_t, ssize_t *));
*/
int
__db_read(fd, addr, len, nrp)
int fd;
void *addr;
size_t len;
ssize_t *nrp;
{
size_t offset;
ssize_t nr;
u_int8_t *taddr;
for (taddr = addr,
offset = 0; offset < len; taddr += nr, offset += nr) {
if ((nr = read(fd, taddr, len - offset)) < 0)
return (errno);
if (nr == 0)
break;
}
*nrp = taddr - (u_int8_t *)addr;
return (0);
}
/*
* __db_write --
* Write to a file handle.
*
* PUBLIC: int __db_write __P((int, void *, size_t, ssize_t *));
*/
int
__db_write(fd, addr, len, nwp)
int fd;
void *addr;
size_t len;
ssize_t *nwp;
{
size_t offset;
ssize_t nw;
u_int8_t *taddr;
for (taddr = addr,
offset = 0; offset < len; taddr += nw, offset += nw)
if ((nw = write(fd, taddr, len - offset)) < 0)
return (errno);
*nwp = len;
return (0);
}
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