#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)stdio.c 8.1 (Berkeley) 6/4/93";
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/stdio/stdio.c,v 1.24 2003/01/07 06:17:13 tjr Exp $");
#include "namespace.h"
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "un-namespace.h"
#include "local.h"
int
__sread(cookie, buf, n)
void *cookie;
char *buf;
int n;
{
FILE *fp = cookie;
return(_read(fp->_file, buf, (size_t)n));
}
int
__swrite(cookie, buf, n)
void *cookie;
char const *buf;
int n;
{
FILE *fp = cookie;
return (_write(fp->_file, buf, (size_t)n));
}
fpos_t
__sseek(cookie, offset, whence)
void *cookie;
fpos_t offset;
int whence;
{
FILE *fp = cookie;
return (lseek(fp->_file, (off_t)offset, whence));
}
int
__sclose(cookie)
void *cookie;
{
return (_close(((FILE *)cookie)->_file));
}
int
_sread(fp, buf, n)
FILE *fp;
char *buf;
int n;
{
int ret;
ret = (*fp->_read)(fp->_cookie, buf, n);
if (ret > 0) {
if (fp->_flags & __SOFF) {
if (fp->_offset <= OFF_MAX - ret)
fp->_offset += ret;
else
fp->_flags &= ~__SOFF;
}
} else if (ret < 0)
fp->_flags &= ~__SOFF;
return (ret);
}
int
_swrite(fp, buf, n)
FILE *fp;
char const *buf;
int n;
{
int ret;
int serrno;
if (fp->_flags & __SAPP) {
serrno = errno;
if (_sseek(fp, (fpos_t)0, SEEK_END) == -1 &&
(fp->_flags & __SOPT))
return (-1);
errno = serrno;
}
ret = (*fp->_write)(fp->_cookie, buf, n);
if (ret >= 0) {
if ((fp->_flags & (__SAPP|__SOFF)) == (__SAPP|__SOFF) &&
fp->_offset <= OFF_MAX - ret)
fp->_offset += ret;
else
fp->_flags &= ~__SOFF;
} else if (ret < 0)
fp->_flags &= ~__SOFF;
return (ret);
}
fpos_t
_sseek(fp, offset, whence)
FILE *fp;
fpos_t offset;
int whence;
{
fpos_t ret;
int serrno, errret;
serrno = errno;
errno = 0;
ret = (*fp->_seek)(fp->_cookie, offset, whence);
errret = errno;
if (errno == 0)
errno = serrno;
if (ret < 0) {
if (errret == 0) {
if (offset != 0 || whence != SEEK_CUR) {
if (HASUB(fp))
FREEUB(fp);
fp->_p = fp->_bf._base;
fp->_r = 0;
fp->_flags &= ~__SEOF;
}
fp->_flags |= __SERR;
errno = EINVAL;
} else if (errret == ESPIPE)
fp->_flags &= ~__SAPP;
fp->_flags &= ~__SOFF;
ret = -1;
} else if (fp->_flags & __SOPT) {
fp->_flags |= __SOFF;
fp->_offset = ret;
}
return (ret);
}