Make exit(), fclose(), fflush(), and freopen() comply with POSIX-2008

requirements for setting the underlying file position when flushing
read-mode streams, and make an fseek()-after-fflush() not change the
underlying file position.

Much testing, review, and assistance from tb@
ok tb@ millert@

1 files changed, 5 insertions, 6 deletions

diff --git a/lib/libc/stdlib/exit.3 b/lib/libc/stdlib/exit.3
index a1c43780d65..5e006e53f40 100644
--- a/lib/libc/stdlib/exit.3
+++ b/lib/libc/stdlib/exit.3
@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: exit.3,v 1.16 2014/11/30 21:21:59 schwarze Exp $
+.\"	$OpenBSD: exit.3,v 1.17 2024/08/12 20:53:09 guenther Exp $
 .\"
-.Dd $Mdocdate: November 30 2014 $
+.Dd $Mdocdate: August 12 2024 $
 .Dt EXIT 3
 .Os
 .Sh NAME
@@ -54,9 +54,7 @@ Call the functions registered with the
 .Xr atexit 3
 function, in the reverse order of their registration.
 .It
-Flush all open output streams.
-.It
-Close all open streams.
+Flush and close all open streams.
 .It
 Unlink all files created with the
 .Xr tmpfile 3
@@ -79,6 +77,7 @@ function never returns.
 .Sh SEE ALSO
 .Xr _exit 2 ,
 .Xr atexit 3 ,
+.Xr fflush 3 ,
 .Xr intro 3 ,
 .Xr sysexits 3 ,
 .Xr tmpfile 3
@@ -86,7 +85,7 @@ function never returns.
 The
 .Fn exit
 function conforms to
-.St -isoC-99 .
+.St -p1003.1-2024 .
 .Sh HISTORY
 An
 .Fn exit