svn commit: r331687 - stable/11/lib/libc/sys

[Ed Maste]

Author: emaste
Date: Wed Mar 28 16:54:15 2018
New Revision: 331687
URL: https://svnweb.freebsd.org/changeset/base/331687

Log:
  MFC r325422: posix_fallocate.2: add an EINVAL errno case
  
  As of r325320 in HEAD posix_fallocate returns EINVAL on ZFS to indicate
  that the underlying filesystem does not support this operation, per
  POSIX.1-2008. Document this case in the man page.
  
  Note that r325320 has not yet been merged to stable/11, and may or may
  not be.  However, we should document that EINVAL may be returned if the
  filesystem does not support posix_fallocate (even if we don't actually
  do so in stable/11), as software should be prepared to handle that case.
  
  Discussed with:	avg
  Sponsored by:	The FreeBSD Foundation

Modified:
  stable/11/lib/libc/sys/posix_fallocate.2
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/lib/libc/sys/posix_fallocate.2
==============================================================================
--- stable/11/lib/libc/sys/posix_fallocate.2	Wed Mar 28 16:51:05 2018	(r331686)
+++ stable/11/lib/libc/sys/posix_fallocate.2	Wed Mar 28 16:54:15 2018	(r331687)
@@ -28,7 +28,7 @@
 .\"     @(#)open.2	8.2 (Berkeley) 11/16/93
 .\" $FreeBSD$
 .\"
-.Dd October 12, 2017
+.Dd November 4, 2017
 .Dt POSIX_FALLOCATE 2
 .Os
 .Sh NAME
@@ -106,9 +106,10 @@ A signal was caught during execution.
 .It Bq Er EINVAL
 The
 .Fa len
-argument was less than or equal to zero or the
+argument was less than or equal to zero, the
 .Fa offset
-argument was less than zero.
+argument was less than zero,
+or the operation is not supported by the file system.
 .It Bq Er EIO
 An I/O error occurred while reading from or writing to a file system.
 .It Bq Er ENODEV