Import macOS userland

adv_cmds-176
basic_cmds-55
bootstrap_cmds-116.100.1
developer_cmds-66
diskdev_cmds-667.40.1
doc_cmds-53.60.1
file_cmds-321.40.3
mail_cmds-35
misc_cmds-34
network_cmds-606.40.1
patch_cmds-17
remote_cmds-63
shell_cmds-216.60.1
system_cmds-880.60.2
text_cmds-106

1 files changed, 632 insertions, 0 deletions

diff --git a/remote_cmds/telnetd.tproj/termstat.c b/remote_cmds/telnetd.tproj/termstat.c
new file mode 100644
index 0000000..e29e526
--- /dev/null
+++ b/remote_cmds/telnetd.tproj/termstat.c
@@ -0,0 +1,632 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if 0
+#ifndef lint
+static const char sccsid[] = "@(#)termstat.c	8.2 (Berkeley) 5/30/95";
+#endif
+#endif
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: src/contrib/telnet/telnetd/termstat.c,v 1.13 2004/07/28 05:37:18 kan Exp $");
+
+#include "telnetd.h"
+
+#ifdef	ENCRYPTION
+#include <libtelnet/encrypt.h>
+#endif
+
+/*
+ * local variables
+ */
+int def_tspeed = -1, def_rspeed = -1;
+#ifdef	TIOCSWINSZ
+int def_row = 0, def_col = 0;
+#endif
+#ifdef	LINEMODE
+static int _terminit = 0;
+#endif	/* LINEMODE */
+
+#ifdef	LINEMODE
+/*
+ * localstat
+ *
+ * This function handles all management of linemode.
+ *
+ * Linemode allows the client to do the local editing of data
+ * and send only complete lines to the server.  Linemode state is
+ * based on the state of the pty driver.  If the pty is set for
+ * external processing, then we can use linemode.  Further, if we
+ * can use real linemode, then we can look at the edit control bits
+ * in the pty to determine what editing the client should do.
+ *
+ * Linemode support uses the following state flags to keep track of
+ * current and desired linemode state.
+ *	alwayslinemode : true if -l was specified on the telnetd
+ * 	command line.  It means to have linemode on as much as
+ *	possible.
+ *
+ * 	lmodetype: signifies whether the client can
+ *	handle real linemode, or if use of kludgeomatic linemode
+ *	is preferred.  It will be set to one of the following:
+ *		REAL_LINEMODE : use linemode option
+ *		NO_KLUDGE : don't initiate kludge linemode.
+ *		KLUDGE_LINEMODE : use kludge linemode
+ *		NO_LINEMODE : client is ignorant of linemode
+ *
+ *	linemode, uselinemode : linemode is true if linemode
+ *	is currently on, uselinemode is the state that we wish
+ *	to be in.  If another function wishes to turn linemode
+ *	on or off, it sets or clears uselinemode.
+ *
+ *	editmode, useeditmode : like linemode/uselinemode, but
+ *	these contain the edit mode states (edit and trapsig).
+ *
+ * The state variables correspond to some of the state information
+ * in the pty.
+ *	linemode:
+ *		In real linemode, this corresponds to whether the pty
+ *		expects external processing of incoming data.
+ *		In kludge linemode, this more closely corresponds to the
+ *		whether normal processing is on or not.  (ICANON in
+ *		system V, or COOKED mode in BSD.)
+ *		If the -l option was specified (alwayslinemode), then
+ *		an attempt is made to force external processing on at
+ *		all times.
+ *
+ * The following heuristics are applied to determine linemode
+ * handling within the server.
+ *	1) Early on in starting up the server, an attempt is made
+ *	   to negotiate the linemode option.  If this succeeds
+ *	   then lmodetype is set to REAL_LINEMODE and all linemode
+ *	   processing occurs in the context of the linemode option.
+ *	2) If the attempt to negotiate the linemode option failed,
+ *	   and the "-k" (don't initiate kludge linemode) isn't set,
+ *	   then we try to use kludge linemode.  We test for this
+ *	   capability by sending "do Timing Mark".  If a positive
+ *	   response comes back, then we assume that the client
+ *	   understands kludge linemode (ech!) and the
+ *	   lmodetype flag is set to KLUDGE_LINEMODE.
+ *	3) Otherwise, linemode is not supported at all and
+ *	   lmodetype remains set to NO_LINEMODE (which happens
+ *	   to be 0 for convenience).
+ *	4) At any time a command arrives that implies a higher
+ *	   state of linemode support in the client, we move to that
+ *	   linemode support.
+ *
+ * A short explanation of kludge linemode is in order here.
+ *	1) The heuristic to determine support for kludge linemode
+ *	   is to send a do timing mark.  We assume that a client
+ *	   that supports timing marks also supports kludge linemode.
+ *	   A risky proposition at best.
+ *	2) Further negotiation of linemode is done by changing the
+ *	   the server's state regarding SGA.  If server will SGA,
+ *	   then linemode is off, if server won't SGA, then linemode
+ *	   is on.
+ */
+void
+localstat(void)
+{
+	int need_will_echo = 0;
+
+	/*
+	 * Check for changes to flow control if client supports it.
+	 */
+	flowstat();
+
+	/*
+	 * Check linemode on/off state
+	 */
+	uselinemode = tty_linemode();
+
+	/*
+	 * If alwayslinemode is on, and pty is changing to turn it off, then
+	 * force linemode back on.
+	 */
+	if (alwayslinemode && linemode && !uselinemode) {
+		uselinemode = 1;
+		tty_setlinemode(uselinemode);
+	}
+
+	if (uselinemode) {
+		/*
+		 * Check for state of BINARY options.
+		 *
+		 * We only need to do the binary dance if we are actually going
+		 * to use linemode.  As this confuses some telnet clients
+		 * that don't support linemode, and doesn't gain us
+		 * anything, we don't do it unless we're doing linemode.
+		 * -Crh (henrich@msu.edu)
+		 */
+
+		if (tty_isbinaryin()) {
+			if (his_want_state_is_wont(TELOPT_BINARY))
+				send_do(TELOPT_BINARY, 1);
+		} else {
+			if (his_want_state_is_will(TELOPT_BINARY))
+				send_dont(TELOPT_BINARY, 1);
+		}
+
+		if (tty_isbinaryout()) {
+			if (my_want_state_is_wont(TELOPT_BINARY))
+				send_will(TELOPT_BINARY, 1);
+		} else {
+			if (my_want_state_is_will(TELOPT_BINARY))
+				send_wont(TELOPT_BINARY, 1);
+		}
+	}
+
+#ifdef	ENCRYPTION
+	/*
+	 * If the terminal is not echoing, but editing is enabled,
+	 * something like password input is going to happen, so
+	 * if we the other side is not currently sending encrypted
+	 * data, ask the other side to start encrypting.
+	 */
+	if (his_state_is_will(TELOPT_ENCRYPT)) {
+		static int enc_passwd = 0;
+		if (uselinemode && !tty_isecho() && tty_isediting()
+		    && (enc_passwd == 0) && !decrypt_input) {
+			encrypt_send_request_start();
+			enc_passwd = 1;
+		} else if (enc_passwd) {
+			encrypt_send_request_end();
+			enc_passwd = 0;
+		}
+	}
+#endif	/* ENCRYPTION */
+
+	/*
+	 * Do echo mode handling as soon as we know what the
+	 * linemode is going to be.
+	 * If the pty has echo turned off, then tell the client that
+	 * the server will echo.  If echo is on, then the server
+	 * will echo if in character mode, but in linemode the
+	 * client should do local echoing.  The state machine will
+	 * not send anything if it is unnecessary, so don't worry
+	 * about that here.
+	 *
+	 * If we need to send the WILL ECHO (because echo is off),
+	 * then delay that until after we have changed the MODE.
+	 * This way, when the user is turning off both editing
+	 * and echo, the client will get editing turned off first.
+	 * This keeps the client from going into encryption mode
+	 * and then right back out if it is doing auto-encryption
+	 * when passwords are being typed.
+	 */
+	if (uselinemode) {
+		if (tty_isecho())
+			send_wont(TELOPT_ECHO, 1);
+		else
+			need_will_echo = 1;
+#ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_OK)
+			lmodetype = KLUDGE_LINEMODE;
+#endif
+	}
+
+	/*
+	 * If linemode is being turned off, send appropriate
+	 * command and then we're all done.
+	 */
+	 if (!uselinemode && linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_dont(TELOPT_LINEMODE, 1);
+# ifdef	KLUDGELINEMODE
+		} else if (lmodetype == KLUDGE_LINEMODE)
+			send_will(TELOPT_SGA, 1);
+# endif	/* KLUDGELINEMODE */
+		send_will(TELOPT_ECHO, 1);
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * If using real linemode check edit modes for possible later use.
+	 * If we are in kludge linemode, do the SGA negotiation.
+	 */
+	if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+		useeditmode = 0;
+		if (tty_isediting())
+			useeditmode |= MODE_EDIT;
+		if (tty_istrapsig())
+			useeditmode |= MODE_TRAPSIG;
+		if (tty_issofttab())
+			useeditmode |= MODE_SOFT_TAB;
+		if (tty_islitecho())
+			useeditmode |= MODE_LIT_ECHO;
+# ifdef	KLUDGELINEMODE
+	} else if (lmodetype == KLUDGE_LINEMODE) {
+		if (tty_isediting() && uselinemode)
+			send_wont(TELOPT_SGA, 1);
+		else
+			send_will(TELOPT_SGA, 1);
+	}
+# endif	/* KLUDGELINEMODE */
+
+	/*
+	 * Negotiate linemode on if pty state has changed to turn it on.
+	 * Send appropriate command and send along edit mode, then all done.
+	 */
+	if (uselinemode && !linemode) {
+# ifdef	KLUDGELINEMODE
+		if (lmodetype == KLUDGE_LINEMODE) {
+			send_wont(TELOPT_SGA, 1);
+		} else if (lmodetype == REAL_LINEMODE) {
+# endif	/* KLUDGELINEMODE */
+			send_do(TELOPT_LINEMODE, 1);
+			/* send along edit modes */
+			output_data("%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			editmode = useeditmode;
+# ifdef	KLUDGELINEMODE
+		}
+# endif	/* KLUDGELINEMODE */
+		linemode = uselinemode;
+		goto done;
+	}
+
+# ifdef	KLUDGELINEMODE
+	/*
+	 * None of what follows is of any value if not using
+	 * real linemode.
+	 */
+	if (lmodetype < REAL_LINEMODE)
+		goto done;
+# endif	/* KLUDGELINEMODE */
+
+	if (linemode && his_state_is_will(TELOPT_LINEMODE)) {
+		/*
+		 * If edit mode changed, send edit mode.
+		 */
+		 if (useeditmode != editmode) {
+			/*
+			 * Send along appropriate edit mode mask.
+			 */
+			output_data("%c%c%c%c%c%c%c", IAC, SB,
+				TELOPT_LINEMODE, LM_MODE, useeditmode,
+				IAC, SE);
+			editmode = useeditmode;
+		}
+
+
+		/*
+		 * Check for changes to special characters in use.
+		 */
+		start_slc(0);
+		check_slc();
+		(void) end_slc(0);
+	}
+
+done:
+	if (need_will_echo)
+		send_will(TELOPT_ECHO, 1);
+	/*
+	 * Some things should be deferred until after the pty state has
+	 * been set by the local process.  Do those things that have been
+	 * deferred now.  This only happens once.
+	 */
+	if (_terminit == 0) {
+		_terminit = 1;
+		defer_terminit();
+	}
+
+	netflush();
+	set_termbuf();
+	return;
+
+}  /* end of localstat */
+#endif	/* LINEMODE */
+
+/*
+ * flowstat
+ *
+ * Check for changes to flow control
+ */
+void
+flowstat(void)
+{
+	if (his_state_is_will(TELOPT_LFLOW)) {
+		if (tty_flowmode() != flowmode) {
+			flowmode = tty_flowmode();
+			output_data("%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					flowmode ? LFLOW_ON : LFLOW_OFF,
+					IAC, SE);
+		}
+		if (tty_restartany() != restartany) {
+			restartany = tty_restartany();
+			output_data("%c%c%c%c%c%c",
+					IAC, SB, TELOPT_LFLOW,
+					restartany ? LFLOW_RESTART_ANY
+						   : LFLOW_RESTART_XON,
+					IAC, SE);
+		}
+	}
+}
+
+/*
+ * clientstat
+ *
+ * Process linemode related requests from the client.
+ * Client can request a change to only one of linemode, editmode or slc's
+ * at a time, and if using kludge linemode, then only linemode may be
+ * affected.
+ */
+void
+clientstat(int code, int parm1, int parm2)
+{
+
+	/*
+	 * Get a copy of terminal characteristics.
+	 */
+	init_termbuf();
+
+	/*
+	 * Process request from client. code tells what it is.
+	 */
+	switch (code) {
+#ifdef	LINEMODE
+	case TELOPT_LINEMODE:
+		/*
+		 * Don't do anything unless client is asking us to change
+		 * modes.
+		 */
+		uselinemode = (parm1 == WILL);
+		if (uselinemode != linemode) {
+# ifdef	KLUDGELINEMODE
+			/*
+			 * If using kludge linemode, make sure that
+			 * we can do what the client asks.
+			 * We can not turn off linemode if alwayslinemode
+			 * and the ICANON bit is set.
+			 */
+			if (lmodetype == KLUDGE_LINEMODE) {
+				if (alwayslinemode && tty_isediting()) {
+					uselinemode = 1;
+				}
+			}
+
+			/*
+			 * Quit now if we can't do it.
+			 */
+			if (uselinemode == linemode)
+				return;
+
+			/*
+			 * If using real linemode and linemode is being
+			 * turned on, send along the edit mode mask.
+			 */
+			if (lmodetype == REAL_LINEMODE && uselinemode)
+# else	/* KLUDGELINEMODE */
+			if (uselinemode)
+# endif	/* KLUDGELINEMODE */
+			{
+				useeditmode = 0;
+				if (tty_isediting())
+					useeditmode |= MODE_EDIT;
+				if (tty_istrapsig())
+					useeditmode |= MODE_TRAPSIG;
+				if (tty_issofttab())
+					useeditmode |= MODE_SOFT_TAB;
+				if (tty_islitecho())
+					useeditmode |= MODE_LIT_ECHO;
+				output_data("%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+							useeditmode, IAC, SE);
+				editmode = useeditmode;
+			}
+
+
+			tty_setlinemode(uselinemode);
+
+			linemode = uselinemode;
+
+			if (!linemode)
+				send_will(TELOPT_ECHO, 1);
+		}
+		break;
+
+	case LM_MODE:
+	    {
+		int ack, changed;
+
+		/*
+		 * Client has sent along a mode mask.  If it agrees with
+		 * what we are currently doing, ignore it; if not, it could
+		 * be viewed as a request to change.  Note that the server
+		 * will change to the modes in an ack if it is different from
+		 * what we currently have, but we will not ack the ack.
+		 */
+		 useeditmode &= MODE_MASK;
+		 ack = (useeditmode & MODE_ACK);
+		 useeditmode &= ~MODE_ACK;
+
+		 if ((changed = (useeditmode ^ editmode))) {
+			/*
+			 * This check is for a timing problem.  If the
+			 * state of the tty has changed (due to the user
+			 * application) we need to process that info
+			 * before we write in the state contained in the
+			 * ack!!!  This gets out the new MODE request,
+			 * and when the ack to that command comes back
+			 * we'll set it and be in the right mode.
+			 */
+			if (ack)
+				localstat();
+			if (changed & MODE_EDIT)
+				tty_setedit(useeditmode & MODE_EDIT);
+
+			if (changed & MODE_TRAPSIG)
+				tty_setsig(useeditmode & MODE_TRAPSIG);
+
+			if (changed & MODE_SOFT_TAB)
+				tty_setsofttab(useeditmode & MODE_SOFT_TAB);
+
+			if (changed & MODE_LIT_ECHO)
+				tty_setlitecho(useeditmode & MODE_LIT_ECHO);
+
+			set_termbuf();
+
+ 			if (!ack) {
+				output_data("%c%c%c%c%c%c%c", IAC,
+					SB, TELOPT_LINEMODE, LM_MODE,
+ 					useeditmode|MODE_ACK,
+ 					IAC, SE);
+ 			}
+
+			editmode = useeditmode;
+		}
+
+		break;
+
+	    }  /* end of case LM_MODE */
+#endif	/* LINEMODE */
+
+	case TELOPT_NAWS:
+#ifdef	TIOCSWINSZ
+	    {
+		struct winsize ws;
+
+		def_col = parm1;
+		def_row = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing window size until after terminal is
+		 * initialized.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+
+		/*
+		 * Change window size as requested by client.
+		 */
+
+		ws.ws_col = parm1;
+		ws.ws_row = parm2;
+		(void) ioctl(spty, TIOCSWINSZ, (char *)&ws);
+	    }
+#endif	/* TIOCSWINSZ */
+
+		break;
+
+	case TELOPT_TSPEED:
+	    {
+		def_tspeed = parm1;
+		def_rspeed = parm2;
+#ifdef	LINEMODE
+		/*
+		 * Defer changing the terminal speed.
+		 */
+		if (terminit() == 0)
+			return;
+#endif	/* LINEMODE */
+		/*
+		 * Change terminal speed as requested by client.
+		 * We set the receive speed first, so that if we can't
+		 * store separate receive and transmit speeds, the transmit
+		 * speed will take precedence.
+		 */
+		tty_rspeed(parm2);
+		tty_tspeed(parm1);
+		set_termbuf();
+
+		break;
+
+	    }  /* end of case TELOPT_TSPEED */
+
+	default:
+		/* What? */
+		break;
+	}  /* end of switch */
+
+	netflush();
+
+}  /* end of clientstat */
+
+#ifdef	LINEMODE
+/*
+ * defer_terminit
+ *
+ * Some things should not be done until after the login process has started
+ * and all the pty modes are set to what they are supposed to be.  This
+ * function is called when the pty state has been processed for the first time.
+ * It calls other functions that do things that were deferred in each module.
+ */
+void
+defer_terminit(void)
+{
+
+	/*
+	 * local stuff that got deferred.
+	 */
+	if (def_tspeed != -1) {
+		clientstat(TELOPT_TSPEED, def_tspeed, def_rspeed);
+		def_tspeed = def_rspeed = 0;
+	}
+
+#ifdef	TIOCSWINSZ
+	if (def_col || def_row) {
+		struct winsize ws;
+
+		memset((char *)&ws, 0, sizeof(ws));
+		ws.ws_col = def_col;
+		ws.ws_row = def_row;
+		(void) ioctl(spty, TIOCSWINSZ, (char *)&ws);
+	}
+#endif
+
+	/*
+	 * The only other module that currently defers anything.
+	 */
+	deferslc();
+
+}  /* end of defer_terminit */
+
+/*
+ * terminit
+ *
+ * Returns true if the pty state has been processed yet.
+ */
+int
+terminit(void)
+{
+	return(_terminit);
+
+}  /* end of terminit */
+#endif	/* LINEMODE */