xref: /illumos-gate/usr/src/cmd/ttymon/tmterm.c (revision 7c478bd9)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License, Version 1.0 only
6  * (the "License").  You may not use this file except in compliance
7  * with the License.
8  *
9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10  * or http://www.opensolaris.org/os/licensing.
11  * See the License for the specific language governing permissions
12  * and limitations under the License.
13  *
14  * When distributing Covered Code, include this CDDL HEADER in each
15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16  * If applicable, add the following below this CDDL HEADER, with the
17  * fields enclosed by brackets "[]" replaced with your own identifying
18  * information: Portions Copyright [yyyy] [name of copyright owner]
19  *
20  * CDDL HEADER END
21  */
22 /*
23  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 
34 #include <stdlib.h>
35 #include <stdio.h>
36 #include <errno.h>
37 #include <termio.h>
38 #include <sys/stermio.h>
39 #include <sys/termiox.h>
40 #include <string.h>
41 #include <ctype.h>
42 #include <unistd.h>
43 #include <sys/types.h>
44 #include "sys/stropts.h"
45 #include "sys/signal.h"
46 #include "ttymon.h"
47 #include "tmstruct.h"
48 #include "tmextern.h"
49 
50 extern	void	mkargv();
51 
52 /*
53  *	set_termio	- set termio on device
54  *		fd	- fd for the device
55  *		options - stty termio options
56  *		aspeed  - autobaud speed
57  *		clear	- if TRUE, current flags will be set to some defaults
58  *			  before applying the options
59  *		    	- if FALSE, current flags will not be cleared
60  *		mode	- terminal mode, CANON, RAW
61  */
62 
63 
64 
65 int
set_termio(fd,options,aspeed,clear,mode)66 set_termio(fd,options,aspeed,clear,mode)
67 int	fd;
68 char	*options;
69 char	*aspeed;
70 int	clear;
71 long	mode;
72 {
73 	struct 	 termio termio;
74 	struct 	 termios termios;
75 	struct 	 stio stermio;
76 	struct 	 termiox termiox;
77 	struct 	 winsize winsize;
78 	struct 	 winsize owinsize;
79 	int	 term;
80 	int	 cnt = 1;
81 	char	 *uarg;
82 	char	 *argvp[MAXARGS];	/* stty args */
83 	static   char	 *binstty = "/usr/bin/stty";
84 	static	 char	buf[BUFSIZ];
85 	extern 	 int get_ttymode(), set_ttymode();
86 	extern	 char	*sttyparse();
87 
88 #ifdef	DEBUG
89 	debug("in set_termio");
90 #endif
91 
92 	if ((term = get_ttymode(fd, &termio, &termios, &stermio,
93 				&termiox, &winsize)) < 0) {
94 		log("set_termio: get_ttymode failed: %s", strerror(errno));
95 		return(-1);
96 	}
97 	owinsize = winsize;
98 	if (clear) {
99 		if (mode & CANON) {
100 			/* could have removed these too - rely on defaults */
101 			termios.c_cc[VEOF] = CEOF;
102 			termios.c_cc[VEOL] = CNUL;
103 		}
104 		else  {
105 			termios.c_lflag &= ECHO;
106 			termios.c_cc[VMIN] = 1;
107 			termios.c_cc[VTIME] = 0;
108 		}
109 
110 	}
111 
112 	if (options != NULL && *options != '\0') {
113 		/* just a place holder to make it look like invoking stty */
114 		argvp[0] = binstty;
115 		(void)strcpy(buf,options);
116 		mkargv(buf,&argvp[1],&cnt,MAXARGS-1);
117 		if (aspeed != NULL && *aspeed != '\0') {
118 			argvp[cnt++] = aspeed;
119 		}
120 		argvp[cnt] = (char *)0;
121 		if ((uarg = sttyparse(cnt, argvp, term, &termio, &termios,
122 				&termiox, &winsize)) != NULL) {
123 			log("sttyparse unknown mode: %s", uarg);
124 			return(-1);
125 		}
126 	}
127 
128 
129 	if (set_ttymode(fd, term, &termio, &termios, &stermio,
130 			&termiox, &winsize, &owinsize) != 0) {
131 		log("set_termio: set_ttymode failed", strerror(errno));
132 		return(-1);
133 	}
134 
135 	return(0);
136 }
137 
138 #ifdef	NOT_USE
139 /*
140  *	turnon_canon	- turn on canonical processing
141  *			- return 0 if succeeds, -1 if fails
142  */
turnon_canon(fd)143 turnon_canon(fd)
144 int	fd;
145 {
146 	struct termio termio;
147 
148 #ifdef	DEBUG
149 	debug("in turnon_canon");
150 #endif
151 	if (ioctl(fd, TCGETA, &termio) != 0) {
152 		log("turnon_canon: TCGETA failed, fd = %d: %s", fd,
153 		    strerror(errno));
154 		return(-1);
155 	}
156 	termio.c_lflag |= (ISIG|ICANON|ECHO|ECHOE|ECHOK);
157 	termio.c_cc[VEOF] = CEOF;
158 	termio.c_cc[VEOL] = CNUL;
159 	if (ioctl(fd, TCSETA, &termio) != 0) {
160 		log("turnon_canon: TCSETA failed, fd = %d: %s", fd,
161 		    strerror(errno));
162 		return(-1);
163 	}
164 	return(0);
165 }
166 #endif
167 
168 /*
169  *	flush_input	- flush the input queue
170  */
171 void
flush_input(fd)172 flush_input(fd)
173 int	fd;
174 {
175 	if (ioctl(fd, I_FLUSH, FLUSHR) == -1)
176 		log("flush_input failed, fd = %d: %s", fd, strerror(errno));
177 
178 	if (ioctl(fd, TCSBRK, 1) == -1)
179 		log("drain of ouput failed, fd = %d: %s", fd, strerror(errno));
180 
181 	return;
182 }
183 
184 /*
185  * push_linedisc	- if modules is not NULL, pop everything
186  *			- then push modules specified by "modules"
187  */
188 int
push_linedisc(int fd,char * modules,char * device)189 push_linedisc(
190 	int	fd,	/* fd to push modules on */
191 	char	*modules, /* ptr to a list of comma separated module names */
192 	char	*device) /* device name for printing msg */
193 {
194 	char	*p, *tp;
195 	char	buf[BUFSIZ];
196 
197 #ifdef	DEBUG
198 	debug("in push_linedisc");
199 #endif
200 	/*
201 	 * copy modules into buf so we won't mess up the original buffer
202 	 * because strtok will chop the string
203 	 */
204 	p = strcpy(buf,modules);
205 
206 	while(ioctl(fd, I_POP, 0) >= 0)  /* pop everything */
207 		;
208 	for (p=(char *)strtok(p,","); p!=(char *)NULL;
209 		p=(char *)strtok(NULL,",")) {
210 		for (tp = p + strlen(p) - 1; tp >= p && isspace(*tp); --tp)
211 			*tp = '\0';
212 		if (ioctl(fd, I_PUSH, p) == -1) {
213 			log("push (%s) on %s failed: %s", p, device,
214 			    strerror(errno));
215 			return(-1);
216 		}
217 	}
218 	return(0);
219 }
220 
221 /*
222  *	hang_up_line	- set speed to B0. This will drop DTR
223  */
224 int
hang_up_line(int fd)225 hang_up_line(int fd)
226 {
227 	struct termio termio;
228 	struct termios termios;
229 
230 #ifdef	DEBUG
231 	debug("in hang_up_line");
232 #endif
233 	if (ioctl(fd,TCGETS,&termios) < 0) {
234 	    if (ioctl(fd,TCGETA,&termio) < 0) {
235 		log("hang_up_line: TCGETA failed: %s", strerror(errno));
236 		return(-1);
237 	    }
238 	    termio.c_cflag &= ~CBAUD;
239 	    termio.c_cflag |= B0;
240 
241 	    if (ioctl(fd,TCSETA,&termio) < 0) {
242 		log("hang_up_line: TCSETA failed: %s", strerror(errno));
243 		return(-1);
244 	    }
245 	} else {
246 	    cfsetospeed(&termios, B0);
247 
248 	    if (ioctl(fd,TCSETS,&termios) < 0) {
249 		log("hang_up_line: TCSETS failed: %s", strerror(errno));
250 		return(-1);
251 	    }
252 	}
253 	return(0);
254 }
255 
256 /*
257  * initial_termio	- set initial termios
258  *			- return 0 if successful, -1 if failed.
259  */
260 int
initial_termio(fd,pmptr)261 initial_termio(fd,pmptr)
262 int	fd;
263 struct	pmtab	*pmptr;
264 {
265 	int	ret;
266 	struct	Gdef *speedef;
267 	struct	Gdef *get_speed();
268 	extern	int  auto_termio();
269 
270 	speedef = get_speed(pmptr->p_ttylabel);
271 	if (speedef->g_autobaud & A_FLAG) {
272 		pmptr->p_ttyflags |= A_FLAG;
273 		if (auto_termio(fd) == -1) {
274 			(void)close(fd);
275 			return(-1);
276 		}
277 	}
278 	else {
279 		if (pmptr->p_ttyflags & R_FLAG)
280 			ret = set_termio(fd,speedef->g_iflags,
281 				(char *)NULL, TRUE, (long)RAW);
282 		else
283 			ret = set_termio(fd,speedef->g_iflags,
284 				(char *)NULL, TRUE, (long)CANON);
285 		if (ret == -1) {
286 			log("initial termio on (%s) failed", pmptr->p_device);
287 			(void)close(fd);
288 			return(-1);
289 		}
290 	}
291 	return(0);
292 }
293