bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

branches: 1.11.16;
PR/50454: Timo Buhrmester: Fix wrong allocation for wall(1) -g
Modernize.

Add new Makefile knob, USE_FORT, which extends USE_SSP by turning on the
FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.

This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.

This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.

Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.

PR/7713: David Holland: warn if we have mesg n.

makefile delint. use NETBSDSRCDIR as appropriate

utmpx support.

use err.h, fix .Nm usage

Add WARNS=1

- Cleanup warnings
- Move ttymsg to libutil.h

Merged with 4.4lite
Changed to conform to NetBSD's new RCS Id conventions.

Add RCS identifiers.

branches: 1.1.1;
Initial revision

- Cleanup warnings
- Move ttymsg to libutil.h

remove possibly dangerous sprintf and strcpy calls.

Merged with 4.4lite
Changed to conform to NetBSD's new RCS Id conventions.

Add RCS identifiers.

branches: 1.1.1;
Initial revision

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

* Add support for "-g group", to send messages to users in this group.
This option may be specified multiple times, and any user in any of the
specified groups will receive the message.
(From OpenBSD, with tweaks from FreeBSD fed back into OpenBSD).

* Ensure that paths are MAXPATHLEN. (From OpenBSD)

* Display timezone when printing time. (From FreeBSD PR 17867 via wall.c 1.14)

More and more .Os cleanups. .Os is defined in the tmac.doc-common file,
so we shouldn't override it with versions in the manpages. Many more to
come.

use err.h, fix .Nm usage

Merged with 4.4lite
Changed to conform to NetBSD's new RCS Id conventions.

Add RCS indentifiers.

branches: 1.1.1;
Initial revision

PR/50454: Timo Buhrmester: Fix wrong allocation for wall(1) -g
Modernize.

static + __dead

Fix WARNS=4 issues (-Wcast-qual -Wsign-compare)

Skip over the ":0" entries that gdm, kdm, and unpatched versions of xdm
(ours is patched to not do this) leave in utmp. PR 26168.

I'm doing this by testing for ^:[0-9] in the line field of utmp(x),
rather than by attempting to stat the device name corresponding to the
entry as in Martin's patch, because (1) no valid tty should ever have
a name beginning with a colon, and (2) this way we don't silently skip
over real ttys that should be there but for some reason have disappeared.

(I suppose this might conceivably fail to catch entries for displays
connected via XDCMP; however, ~nobody does that any more and XDCMP is
a security hole anyhow. If anyone's really concerned about this, let
me know.)

In the long run we should look into ways of getting "tty" messages to
users logged in with an X session and no terminal windows open, as
that's probably fairly common for the desktop.

branches: 1.26.6;
Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.25.28;
Call check_sender with NULL atime, meaning no strict checking.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

PR/7713: David Holland: warn if we have mesg n.

fix minor buglet in previous

* Add support for "-g group", to send messages to users in this group.
This option may be specified multiple times, and any user in any of the
specified groups will receive the message.
(From OpenBSD, with tweaks from FreeBSD fed back into OpenBSD).

* Ensure that paths are MAXPATHLEN. (From OpenBSD)

* Display timezone when printing time. (From FreeBSD PR 17867 via wall.c 1.14)

defend against malicious line in ut_line, which could cause unwanted
writes to anything under /dev. revoke setuid/gid privs earlier.
From: xs@kittenz.org

utmpx support.

ANSIfy

Remove mysterious check for "sleeper" who would not get walled.

- Knf auto variables in modified line by me.
- Print "??" as tty name instead of print nothing. Suggested by jhawk.

Increase temporary buffer size not to truncate temp file template.

- Check return value of ttyname(3) and prevent to pass NULL pointer for
"%s" in printf style format string.
- Use STDERR_FILENO as paramter for ttyname(3).

branches: 1.13.4;
Don't declare 'extern opt*' getopt variables.

PR/7664: David Holand: bogus check for mkstemp() return code.

branches: 1.11.2;
const poisoning.

ensure hostname fits and is nul-terminated.

use err.h, fix .Nm usage

- Cleanup warnings
- Move ttymsg to libutil.h

remove possibly dangerous sprintf and strcpy calls.

Merged with 4.4lite
Changed to conform to NetBSD's new RCS Id conventions.

Minor tweaks: including header files to bring prototypes into scope,
explicitly declaring function return values, etc. to make gcc -Wall
shut up.

Add RCS identifiers.

Fix NULL pointer reference and don't drop character when wrapping.

added support for uid `nobody' running wall with -n option (no banner),
for rwalld support.

branches: 1.1.1;
Initial revision