svn commit: r354565 - head/lib/libc/sys
Rick Macklem
rmacklem at FreeBSD.org
Fri Nov 8 23:49:28 UTC 2019
Author: rmacklem
Date: Fri Nov 8 23:49:27 2019
New Revision: 354565
URL: https://svnweb.freebsd.org/changeset/base/354565
Log:
Update the copy_file_range.2 man page to reflect the semantic change
implemented by r354564.
This is a content change.
Modified:
head/lib/libc/sys/copy_file_range.2
Modified: head/lib/libc/sys/copy_file_range.2
==============================================================================
--- head/lib/libc/sys/copy_file_range.2 Fri Nov 8 23:39:17 2019 (r354564)
+++ head/lib/libc/sys/copy_file_range.2 Fri Nov 8 23:49:27 2019 (r354565)
@@ -25,7 +25,7 @@
.\"
.\" $FreeBSD$
.\"
-.Dd July 24, 2019
+.Dd November 8, 2019
.Dt COPY_FILE_RANGE 2
.Os
.Sh NAME
@@ -113,6 +113,14 @@ data ranges found.
If it succeeds, the call returns the number of bytes copied, which can be fewer
than
.Fa len .
+Returning fewer bytes than
+.Fa len
+does not necessarily indicate that EOF was reached.
+However, a return of zero for a non-zero
+.Fa len
+argument indicates that the offset for
+.Fa infd
+is at or beyond EOF.
.Fn copy_file_range
should be used in a loop until copying of the desired byte range has been
completed.
@@ -154,13 +162,6 @@ and
.Fa outoffp
are reset to the initial values for the system call.
.It Bq Er EINVAL
-If the initial offset for
-.Fa infd
-plus
-.Fa len
-exceeds EOF for
-.Fa infd
-or
.Fa
flags
is not zero.
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