svn commit: r348597 - stable/12/sys/fs/pseudofs

[Johannes Lundberg]

Author: johalun
Date: Tue Jun  4 01:00:30 2019
New Revision: 348597
URL: https://svnweb.freebsd.org/changeset/base/348597

Log:
  MFC r348338:
  pseudofs: Ignore unsupported commands in vop_setattr.
  
  Users of pseudofs (e.g. lindebugfs), should be able to receive
  input from command line via commands like "echo 1 > /path/to/file".
  Currently this fails because sh tries to truncate the file first and
  vop_setattr returns not supported error for this. This patch simply
  ignores the error and returns 0 instead.
  
  Reviewed by:	imp (mentor), asomers
  Approved by:	imp (mentor), asomers
  Differential Revision: D20451

Modified:
  stable/12/sys/fs/pseudofs/pseudofs_vnops.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/sys/fs/pseudofs/pseudofs_vnops.c
==============================================================================
--- stable/12/sys/fs/pseudofs/pseudofs_vnops.c	Tue Jun  4 00:42:51 2019	(r348596)
+++ stable/12/sys/fs/pseudofs/pseudofs_vnops.c	Tue Jun  4 01:00:30 2019	(r348597)
@@ -967,7 +967,8 @@ pfs_setattr(struct vop_setattr_args *va)
 	PFS_TRACE(("%s", pn->pn_name));
 	pfs_assert_not_owned(pn);
 
-	PFS_RETURN (EOPNOTSUPP);
+	/* Silently ignore unchangeable attributes. */
+	PFS_RETURN (0);
 }
 
 /*