-.\" $OpenBSD: fclose.3,v 1.10 2024/08/12 20:53:09 guenther Exp $
+.\" $OpenBSD: fclose.3,v 1.11 2024/08/30 03:44:48 guenther Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd $Mdocdate: August 12 2024 $
+.Dd $Mdocdate: August 30 2024 $
.Dt FCLOSE 3
.Os
.Sh NAME
function dissociates the named
.Fa stream
from its underlying file or set of functions.
-If the stream was being used for output then any buffered data is written
-first,
-while if the stream was being used for input then the underlying
-file position may be updated,
-as if via
+If the stream was being used for output, any buffered data is written
+first, using
.Xr fflush 3 .
.Sh RETURN VALUES
Upon successful completion 0 is returned.
The
.Fn fclose
function conforms to
-.St -p1003.1-2024 .
+.St -ansiC .
.Sh HISTORY
The
.Fn fclose
-/* $OpenBSD: fclose.c,v 1.11 2024/08/12 20:53:09 guenther Exp $ */
+/* $OpenBSD: fclose.c,v 1.12 2024/08/30 03:44:48 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
}
FLOCKFILE(fp);
WCIO_FREE(fp);
- r = __sflush(fp);
+ r = fp->_flags & __SWR ? __sflush(fp) : 0;
if (fp->_close != NULL && (*fp->_close)(fp->_cookie) < 0)
r = EOF;
if (fp->_flags & __SMBF)
-.\" $OpenBSD: fflush.3,v 1.16 2024/08/13 05:52:09 jmc Exp $
+.\" $OpenBSD: fflush.3,v 1.17 2024/08/30 03:44:48 guenther Exp $
.\"
.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.Dd $Mdocdate: August 13 2024 $
+.Dd $Mdocdate: August 30 2024 $
.Dt FFLUSH 3
.Os
.Sh NAME
but not yet obtained via
.Xr getc 3 ;
this includes any text pushed back via
-.Xr ungetc 3
-or
-.Xr ungetwc 3 .
+.Xr ungetc 3 .
.Sh RETURN VALUES
Upon successful completion 0 is returned.
Otherwise,
.Bl -tag -width Er
.It Bq Er EBADF
.Fa stream
-is not an open stream.
+is not an open stream or, in the case of
+.Fn fflush ,
+not a stream open for writing.
.El
.Pp
The function
The
.Fn fflush
function conforms to
-.St -p1003.1-2024 .
+.St -ansiC .
.Sh HISTORY
A predecessor
.Fn flush
-/* $OpenBSD: fflush.c,v 1.10 2024/08/12 20:53:09 guenther Exp $ */
+/* $OpenBSD: fflush.c,v 1.11 2024/08/30 03:44:48 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
#include <errno.h>
#include <stdio.h>
-#include <stdlib.h>
#include "local.h"
/* Flush a single file, or (if fp is NULL) all files. */
if (fp == NULL)
return (_fwalk(__sflush_locked));
FLOCKFILE(fp);
- r = __sflush(fp);
+ if ((fp->_flags & (__SWR | __SRW)) == 0) {
+ errno = EBADF;
+ r = EOF;
+ } else
+ r = __sflush(fp);
FUNLOCKFILE(fp);
return (r);
}
__sflush(FILE *fp)
{
unsigned char *p;
- fpos_t off;
int n, t;
t = fp->_flags;
- if (t & __SWR) {
- if ((p = fp->_bf._base) == NULL)
- return (0);
+ if ((t & __SWR) == 0)
+ return (0);
- n = fp->_p - p; /* write this much */
+ if ((p = fp->_bf._base) == NULL)
+ return (0);
- /*
- * Set these immediately to avoid problems with longjmp and to
- * allow exchange buffering (via setvbuf) in user write
- * function.
- */
- fp->_p = p;
- fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size;
+ n = fp->_p - p; /* write this much */
- for (; n > 0; n -= t, p += t) {
- t = (*fp->_write)(fp->_cookie, (char *)p, n);
- if (t <= 0) {
- fp->_flags |= __SERR;
- return (EOF);
- }
- }
- } else if ((t & __SRD) && !(t & __SEOF)) {
- if (fp->_seek != __sseek || fp->_file < 0) {
- errno = EBADF;
- return EOF;
- }
+ /*
+ * Set these immediately to avoid problems with longjmp and to allow
+ * exchange buffering (via setvbuf) in user write function.
+ */
+ fp->_p = p;
+ fp->_w = t & (__SLBF|__SNBF) ? 0 : fp->_bf._size;
- off = fp->_r;
- if (HASUB(fp)) {
- off += fp->_ur;
- FREEUB(fp);
+ for (; n > 0; n -= t, p += t) {
+ t = (*fp->_write)(fp->_cookie, (char *)p, n);
+ if (t <= 0) {
+ fp->_flags |= __SERR;
+ return (EOF);
}
- if (t & __SOFF) {
- off = fp->_offset - off;
- __sseek(fp->_cookie, off, SEEK_SET);
- } else if (off != 0)
- __sseek(fp->_cookie, -off, SEEK_CUR);
-
- WCIO_FREE(fp);
- fp->_p = fp->_bf._base;
- fp->_r = 0;
}
return (0);
}
-/* $OpenBSD: freopen.c,v 1.18 2024/08/12 20:53:09 guenther Exp $ */
+/* $OpenBSD: freopen.c,v 1.19 2024/08/30 03:44:48 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
isopen = 0;
wantfd = -1;
} else {
- /* flush the stream; POSIX, not ANSI, requires this. */
- (void) __sflush(fp);
+ /* flush the stream; ANSI doesn't require this. */
+ if (fp->_flags & __SWR)
+ (void) __sflush(fp);
/* if close is NULL, closing is a no-op, hence pointless */
isopen = fp->_close != NULL;
if ((wantfd = fp->_file) < 0 && isopen) {
-/* $OpenBSD: fseek.c,v 1.15 2024/08/12 20:53:09 guenther Exp $ */
+/* $OpenBSD: fseek.c,v 1.16 2024/08/30 03:44:48 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
/*
* Can only optimise if:
* reading (and not reading-and-writing);
- * not unbuffered;
- * not immediately after an fflush(); and
+ * not unbuffered; and
* this is a `regular' Unix file (and hence seekfn==__sseek).
* We must check __NBF first, because it is possible to have __NBF
* and __SOPT both set.
__smakebuf(fp);
if (fp->_flags & (__SWR | __SRW | __SNBF | __SNPT))
goto dumb;
- if (fp->_r == 0 && (fp->_p == NULL || fp->_p == fp->_bf._base))
- goto dumb;
if ((fp->_flags & __SOPT) == 0) {
if (seekfn != __sseek ||
fp->_file < 0 || fstat(fp->_file, &st) == -1 ||
* do it. Allow the seek function to change fp->_bf._base.
*/
dumb:
- if (((fp->_flags & __SWR) && __sflush(fp)) ||
+ if (__sflush(fp) ||
(*seekfn)(fp->_cookie, (fpos_t)offset, whence) == POS_ERR) {
FUNLOCKFILE(fp);
return (EOF);
-/* $OpenBSD: ftell.c,v 1.12 2024/08/12 20:53:09 guenther Exp $ */
+/* $OpenBSD: ftell.c,v 1.13 2024/08/30 03:44:48 guenther Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
* adjust for buffered bytes.
*/
FLOCKFILE(fp);
- if (fp->_flags & __SWR)
- __sflush(fp); /* may adjust seek offset on append stream */
+ __sflush(fp); /* may adjust seek offset on append stream */
if (fp->_flags & __SOFF)
pos = fp->_offset;
else {
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
-.\" $OpenBSD: exit.3,v 1.17 2024/08/12 20:53:09 guenther Exp $
+.\" $OpenBSD: exit.3,v 1.18 2024/08/30 03:44:48 guenther Exp $
.\"
-.Dd $Mdocdate: August 12 2024 $
+.Dd $Mdocdate: August 30 2024 $
.Dt EXIT 3
.Os
.Sh NAME
.Xr atexit 3
function, in the reverse order of their registration.
.It
-Flush and close all open streams.
+Flush all open output streams.
+.It
+Close all open streams.
.It
Unlink all files created with the
.Xr tmpfile 3
.Sh SEE ALSO
.Xr _exit 2 ,
.Xr atexit 3 ,
-.Xr fflush 3 ,
.Xr intro 3 ,
.Xr sysexits 3 ,
.Xr tmpfile 3
The
.Fn exit
function conforms to
-.St -p1003.1-2024 .
+.St -isoC-99 .
.Sh HISTORY
An
.Fn exit
projects / openbsd / commitdiff