Remove telnetd

The telnetd codebase is unmaintained and has a number of quality
issues. Telnet has been largely supplanted by ssh. If needed, a port is
available (net/freebsd-telnetd), but a more maintained implementation
should be prefered.

While the telnet client suffers from the same issues, it is deemed
to be of lower risk and is required to connect to legacy devices, so
it remains.

Reviewed by:	emaste, imp
Differential Revision:	https://reviews.freebsd.org/D36620

8 files changed, 5 insertions, 116 deletions

diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index 2056b4296a94..0a0c6dfb044a 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -52,6 +52,11 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20220928: telnetd(8) removed
+OLD_FILES+=etc/pam.d/telnetd
+OLD_FILES+=usr/libexec/telnetd
+OLD_FILES+=usr/share/man/man8/telnetd.8.gz
+
 # 20220914: domain(9) updated
 OLD_FILES+=usr/share/man/man9/domain_init.9.gz
 OLD_FILES+=usr/share/man/man9/pfctlinput.9.gz
diff --git a/lib/libpam/pam.d/Makefile b/lib/libpam/pam.d/Makefile
index 1499f916cb17..da30a4682f53 100644
--- a/lib/libpam/pam.d/Makefile
+++ b/lib/libpam/pam.d/Makefile
@@ -34,10 +34,4 @@ afterinstallconfig:
 	${INSTALL_LINK} ${TAG_ARGS} ${DESTDIR}${CONFDIR}/ftpd ${DESTDIR}${CONFDIR}/ftp
 .endif
 
-.if ${MK_TELNET} != "no"
-CONFGROUPS+=	TELNET
-TELNET+=	telnetd
-TELNETPACKAGE=	telnet
-.endif
-
 .include <bsd.prog.mk>
diff --git a/lib/libpam/pam.d/telnetd b/lib/libpam/pam.d/telnetd
deleted file mode 100644
index fb2f523d4ad1..000000000000
--- a/lib/libpam/pam.d/telnetd
+++ /dev/null
@@ -1,26 +0,0 @@
-#
-# $FreeBSD$
-#
-# PAM configuration for the "telnetd" service
-#
-
-# auth
-auth		sufficient	pam_opie.so		no_warn no_fake_prompts
-auth		requisite	pam_opieaccess.so	no_warn allow_local
-#auth		sufficient	pam_krb5.so		no_warn try_first_pass
-#auth		sufficient	pam_ssh.so		no_warn try_first_pass
-auth		required	pam_unix.so		no_warn try_first_pass
-
-# account
-account		required	pam_nologin.so
-#account	required	pam_krb5.so
-account		required	pam_login_access.so
-account		required	pam_unix.so
-
-# session
-#session	optional	pam_ssh.so		want_agent
-session		required	pam_lastlog.so		no_fail
-
-# password
-#password	sufficient	pam_krb5.so		no_warn try_first_pass
-password	required	pam_unix.so		no_warn try_first_pass
diff --git a/libexec/Makefile b/libexec/Makefile
index 1b41ae81565c..8d7565fe3ee5 100644
--- a/libexec/Makefile
+++ b/libexec/Makefile
@@ -27,7 +27,6 @@ SUBDIR=	${_atf} \
 	${_rtld-elf} \
 	save-entropy \
 	${_smrsh} \
-	${_telnetd} \
 	${_tests} \
 	${_tftp-proxy} \
 	ulog-helper \
@@ -104,10 +103,6 @@ SUBDIR+=	talkd
 SUBDIR+=	tcpd
 .endif
 
-.if ${MK_TELNET} != "no"
-_telnetd=	telnetd
-.endif
-
 .if ${MK_TFTP} != "no"
 SUBDIR+=	tftpd
 .endif
diff --git a/libexec/telnetd/Makefile b/libexec/telnetd/Makefile
deleted file mode 100644
index 09136d360a71..000000000000
--- a/libexec/telnetd/Makefile
+++ /dev/null
@@ -1,45 +0,0 @@
-# $FreeBSD$
-
-# Do not define -DKLUDGELINEMODE, as it does not interact well with many
-# telnet implementations.
-
-.include <src.opts.mk>
-
-PACKAGE=	telnet
-
-TELNETDIR=	${SRCTOP}/contrib/telnet
-.PATH:		${TELNETDIR}/telnetd
-
-PROG=		telnetd
-MAN=		telnetd.8
-
-SRCS=		global.c slc.c state.c sys_term.c telnetd.c \
-		termstat.c utility.c
-
-WARNS?=		2
-WFORMAT?=	0
-
-CFLAGS+=	-DLINEMODE -DUSE_TERMIO -DDIAGNOSTICS -DOLD_ENVIRON \
-		-DENV_HACK -DSTREAMSPTY
-
-.if ${MK_INET6_SUPPORT} != "no"
-CFLAGS+=	-DINET6
-.endif
-
-CFLAGS+=	-I${TELNETDIR}
-CFLAGS+=	-I${TELNETDIR}/telnet
-
-LIBADD=		telnet util tinfow
-
-.if ${MK_OPENSSL} != "no"
-SRCS+=		authenc.c
-CFLAGS+=	-DAUTHENTICATION -DENCRYPTION
-LIBADD+=	mp crypto pam
-.endif
-
-.if ${MK_KERBEROS_SUPPORT} != "no"
-CFLAGS+=	-DKRB5 -DFORWARD -Dnet_write=telnet_net_write
-LIBADD+=	krb5 roken
-.endif
-
-.include <bsd.prog.mk>
diff --git a/libexec/telnetd/Makefile.depend b/libexec/telnetd/Makefile.depend
deleted file mode 100644
index 60b7e4479a3f..000000000000
--- a/libexec/telnetd/Makefile.depend
+++ /dev/null
@@ -1,25 +0,0 @@
-# $FreeBSD$
-# Autogenerated - do NOT edit!
-
-DIRDEPS = \
-	include \
-	include/arpa \
-	include/xlocale \
-	lib/${CSU_DIR} \
-	lib/libc \
-	lib/libcom_err \
-	lib/libcompiler_rt \
-	lib/libcrypt \
-	lib/libmp \
-	lib/libpam/libpam \
-	lib/libtelnet \
-	lib/libthr \
-	lib/libutil \
-	lib/ncurses/ncursesw \
-
-
-.include <dirdeps.mk>
-
-.if ${DEP_RELDIR} == ${_DEP_RELDIR}
-# local dependencies - needed for -jN in clean tree
-.endif
diff --git a/libexec/telnetd/Makefile.depend.options b/libexec/telnetd/Makefile.depend.options
deleted file mode 100644
index 4c4ba810c0e2..000000000000
--- a/libexec/telnetd/Makefile.depend.options
+++ /dev/null
@@ -1,6 +0,0 @@
-# $FreeBSD$
-# This file is not autogenerated - take care!
-
-DIRDEPS_OPTIONS= KERBEROS_SUPPORT OPENSSL
-
-.include <dirdeps-options.mk>
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index 1bcc0d2d80bc..4145859f21cd 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -8242,11 +8242,8 @@ OLD_FILES+=usr/share/nls/uk_UA.UTF-8/tcsh.cat
 .endif
 
 .if ${MK_TELNET} == no
-OLD_FILES+=etc/pam.d/telnetd
 OLD_FILES+=usr/bin/telnet
-OLD_FILES+=usr/libexec/telnetd
 OLD_FILES+=usr/share/man/man1/telnet.1.gz
-OLD_FILES+=usr/share/man/man8/telnetd.8.gz
 .endif
 
 .if ${MK_TESTS} == yes