Add a ``-P altlogin'' option which allows the sysadmin to specify an

alternate login(1) type program to run.

3 files changed, 21 insertions, 4 deletions

diff --git a/libexec/telnetd/sys_term.c b/libexec/telnetd/sys_term.c
index 40610c2..77a9b7e 100644
--- a/libexec/telnetd/sys_term.c
+++ b/libexec/telnetd/sys_term.c
@@ -42,6 +42,8 @@ static char sccsid[] = "@(#)sys_term.c	8.2 (Berkeley) 12/15/93";
 #include <libtelnet/auth.h>
 #endif
 
+extern char *altlogin;
+
 #if defined(CRAY) || defined(__hpux)
 # define PARENT_DOES_UTMP
 #endif
@@ -1728,10 +1730,14 @@ start_login(host, autologin, name)
 		close(pty);
 #endif
 	closelog();
-	execv(_PATH_LOGIN, argv);
 
-	syslog(LOG_ERR, "%s: %m\n", _PATH_LOGIN);
-	fatalperror(net, _PATH_LOGIN);
+	if (altlogin == NULL) {
+		altlogin = _PATH_LOGIN;
+	}
+	execv(altlogin, argv);
+
+	syslog(LOG_ERR, "%s: %m\n", altlogin);
+	fatalperror(net, altlogin);
 	/*NOTREACHED*/
 }
 
diff --git a/libexec/telnetd/telnetd.8 b/libexec/telnetd/telnetd.8
index fee5526..d63c4c5 100644
--- a/libexec/telnetd/telnetd.8
+++ b/libexec/telnetd/telnetd.8
@@ -48,6 +48,7 @@ protocol server
 .Op Fl X Ar authtype
 .Op Fl a Ar authmode
 .Op Fl edebug
+.Op Fl P Ar loginprog
 .Op Fl r Ns Ar lowpty-highpty
 .Op Fl u Ar len
 .Op Fl debug Op Ar port
@@ -187,6 +188,11 @@ If
 has been compiled with support for data encryption, then the
 .Fl edebug
 option may be used to enable encryption debugging code.
+.It Fl P Ar loginprog
+Specifies an alternate
+.Xr login 1
+command to run to complete the login.  The alternate command must
+understand the same command arguments as the standard login.
 .It Fl h
 Disables the printing of host-specific information before
 login has been completed.
diff --git a/libexec/telnetd/telnetd.c b/libexec/telnetd/telnetd.c
index b83b6a0..e131cae 100644
--- a/libexec/telnetd/telnetd.c
+++ b/libexec/telnetd/telnetd.c
@@ -124,6 +124,7 @@ int	lowpty = 0, highpty;	/* low, high pty numbers */
 int debug = 0;
 int keepalive = 1;
 char *progname;
+char *altlogin;
 
 extern void usage P((void));
 
@@ -133,7 +134,7 @@ extern void usage P((void));
  * passed off to getopt().
  */
 char valid_opts[] = {
-	'd', ':', 'h', 'k', 'n', 'S', ':', 'u', ':', 'U',
+	'd', ':', 'h', 'k', 'n', 'p', ':', 'S', ':', 'u', ':', 'U',
 #ifdef	AUTHENTICATION
 	'a', ':', 'X', ':',
 #endif
@@ -284,6 +285,10 @@ main(argc, argv)
 			keepalive = 0;
 			break;
 
+		case 'p':
+			altlogin = optarg;
+			break;
+
 #ifdef CRAY
 		case 'r':
 		    {