Enable WARNS=4 by default for usr.bin, except for:
awk bdes checknr compile_et error gss hxtool kgetcred kinit
klist ldd less lex locale login m4 man menuc mk_cmds
mklocale msgc openssl rpcgen rpcinfo sdiff spell ssh
string2key telnet tn3270 verify_krb5_conf xlint

branches: 1.1.36;
Add a getextattr(1)/setextattr(1)/rmextattr(1)/lsextattr(1) utility
that gets, sets, removes, and lists file system extended attributes.

From FreeBSD.

Fix typos, remove trailing whitespace.

Improve extended attribute commands:
- allow namespace to be omitted when using a namespace-prefixed attribute
name, a la Linux.
- Improve hexdump for getextattr -x
- Add more display option for binary attributes, using vis(3)
- Add a -i option to setextattr to get the attribute value from file, so
that we can set binary values

This is installed in section 1, so make internal section the same.
Also use name under which it is installed as main internal name.
Comment out reference to extattr(2) which doesn't exist on NetBSD
(a reference to extattr(3) still remains).

branches: 1.2.34; 1.2.48;
Add RCS Id, bump date for when it appeared in NetBSD, mention
NetBSD appearance in HISTORY section, fmt a paragraph.

Add a getextattr(1)/setextattr(1)/rmextattr(1)/lsextattr(1) utility
that gets, sets, removes, and lists file system extended attributes.

From FreeBSD.

fix various typos in comments.

Use returned size and not buffer max length when displaying attribute
From Thomas Schmitt <scdbackup@gmx.net>

Do not record a trailing \0
From Thomas Schmitt <scdbackup@gmx.net>

branches: 1.10.2; 1.10.8;
Fix off-by-one in hexdump display (getextattr -x), which displayed a
trailing garbage byte.

branches: 1.9.2; 1.9.4;
Use __dead

Improve extended attribute commands:
- allow namespace to be omitted when using a namespace-prefixed attribute
name, a la Linux.
- Improve hexdump for getextattr -x
- Add more display option for binary attributes, using vis(3)
- Add a -i option to setextattr to get the attribute value from file, so
that we can set binary values

Add a flag to VOP_LISTEXTATTR(9) so that the vnode interface can tell the
filesystem in which format extended attribute shall be listed.

There are currently two formats:
- NUL-terminated strings, used for listxattr(2), this is the default.
- one byte length-pprefixed, non NUL-terminated strings, used for
extattr_list_file(2), which is obtanined by setting the
EXTATTR_LIST_PREFIXLEN flag to VOP_LISTEXTATTR(9)

This approach avoid the need for converting the list back and forth, except
in libperfuse, since FUSE uses NUL-terminated strings, and the kernel may
have requested EXTATTR_LIST_PREFIXLEN.

Fix previous broken commit for extended attribute listing.

Implement extended attribute listing for UFS1.

Modify lsextattr(8) so that it does not expect each attribute name to be
prefixed by its length. This enable extattr_list_(file|link|fd) to
return a buffer matching its documentation. This also makes the interface
similar to what Linux and FUSE do, which is nice for interoperability.

Note that since we had no EA implementation supporting listing, we do
not break anything.

Don't use user input as format string

branches: 1.3.26;
mark strpy safe

branches: 1.2.2;
appease gcc -Wuninitialized

Add a getextattr(1)/setextattr(1)/rmextattr(1)/lsextattr(1) utility
that gets, sets, removes, and lists file system extended attributes.

From FreeBSD.