General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.

8 files changed, 16 insertions, 0 deletions

diff --git a/lib/libc/regex/cname.h b/lib/libc/regex/cname.h
index 28452c93fe7f..3419181aac97 100644
--- a/lib/libc/regex/cname.h
+++ b/lib/libc/regex/cname.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/engine.c b/lib/libc/regex/engine.c
index 7c70b685437d..d31ccaf74d2f 100644
--- a/lib/libc/regex/engine.c
+++ b/lib/libc/regex/engine.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/regcomp.c b/lib/libc/regex/regcomp.c
index 2d0bacffb7c6..e460e1456364 100644
--- a/lib/libc/regex/regcomp.c
+++ b/lib/libc/regex/regcomp.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/regerror.c b/lib/libc/regex/regerror.c
index 8496ba78002a..0e555784f0dc 100644
--- a/lib/libc/regex/regerror.c
+++ b/lib/libc/regex/regerror.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/regex2.h b/lib/libc/regex/regex2.h
index a9c831b441cd..a7c45683229c 100644
--- a/lib/libc/regex/regex2.h
+++ b/lib/libc/regex/regex2.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/regexec.c b/lib/libc/regex/regexec.c
index 46b07758eab3..bf27d05f86c6 100644
--- a/lib/libc/regex/regexec.c
+++ b/lib/libc/regex/regexec.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/regfree.c b/lib/libc/regex/regfree.c
index 296819adfba7..859c2a4b37b2 100644
--- a/lib/libc/regex/regfree.c
+++ b/lib/libc/regex/regfree.c
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.
diff --git a/lib/libc/regex/utils.h b/lib/libc/regex/utils.h
index f62f51747911..b2dba2ee4e93 100644
--- a/lib/libc/regex/utils.h
+++ b/lib/libc/regex/utils.h
@@ -1,4 +1,6 @@
 /*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
  * Copyright (c) 1992, 1993, 1994 Henry Spencer.
  * Copyright (c) 1992, 1993, 1994
  *	The Regents of the University of California.  All rights reserved.