svn commit: r357851 - stable/11/lib/libc/stdio

[Kyle Evans]

Author: kevans
Date: Thu Feb 13 03:11:39 2020
New Revision: 357851
URL: https://svnweb.freebsd.org/changeset/base/357851

Log:
  MFC r327181: fsync(3): correctly document return values
  
  In r268924 the behavior of fflush was changed to return success
  on read only streams. Document this.

Modified:
  stable/11/lib/libc/stdio/fflush.3
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/lib/libc/stdio/fflush.3
==============================================================================
--- stable/11/lib/libc/stdio/fflush.3	Thu Feb 13 01:42:13 2020	(r357850)
+++ stable/11/lib/libc/stdio/fflush.3	Thu Feb 13 03:11:39 2020	(r357851)
@@ -32,7 +32,7 @@
 .\"     @(#)fflush.3	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD$
 .\"
-.Dd June 4, 1993
+.Dd December 25, 2017
 .Dt FFLUSH 3
 .Os
 .Sh NAME
@@ -87,9 +87,7 @@ is set to indicate the error.
 The
 .Fa stream
 argument
-is not an open stream, or, in the case of
-.Fn fflush ,
-not a stream open for writing.
+is not an open stream.
 .El
 .Pp
 The function
@@ -97,7 +95,12 @@ The function
 may also fail and set
 .Va errno
 for any of the errors specified for the routine
-.Xr write 2 .
+.Xr write 2 ,
+except that in case of
+.Fa stream
+being a read-only descriptor,
+.Fn fflush
+returns 0.
 .Sh SEE ALSO
 .Xr write 2 ,
 .Xr fclose 3 ,