xref: /illumos-gate/usr/src/cmd/ttymon/tmterm.c (revision 3bb2c156)
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 #include <stdlib.h>
31 #include <stdio.h>
32 #include <errno.h>
33 #include <termio.h>
34 #include <sys/stermio.h>
35 #include <sys/termiox.h>
36 #include <string.h>
37 #include <ctype.h>
38 #include <unistd.h>
39 #include <sys/types.h>
40 #include "sys/stropts.h"
41 #include "sys/signal.h"
42 #include "ttymon.h"
43 #include "tmstruct.h"
44 #include "tmextern.h"
45 
46 /*
47  *	set_termio	- set termio on device
48  *		fd	- fd for the device
49  *		options - stty termio options
50  *		aspeed  - autobaud speed
51  *		clear	- if TRUE, current flags will be set to some defaults
52  *			  before applying the options
53  *			- if FALSE, current flags will not be cleared
54  *		mode	- terminal mode, CANON, RAW
55  */
56 
57 
58 
59 int
set_termio(int fd,char * options,char * aspeed,int clear,long mode)60 set_termio(int fd, char *options, char *aspeed, int clear, long mode)
61 {
62 	struct	 termio termio;
63 	struct	 termios termios;
64 	struct	 stio stermio;
65 	struct	 termiox termiox;
66 	struct	 winsize winsize;
67 	struct	 winsize owinsize;
68 	int	 term;
69 	int	 cnt = 1;
70 	char	 *uarg;
71 	char	 *argvp[MAXARGS];	/* stty args */
72 	static   char	 *binstty = "/usr/bin/stty";
73 	static	 char	buf[BUFSIZ];
74 
75 #ifdef	DEBUG
76 	debug("in set_termio");
77 #endif
78 
79 	if ((term = get_ttymode(fd, &termio, &termios, &stermio,
80 	    &termiox, &winsize)) < 0) {
81 		log("set_termio: get_ttymode failed: %s", strerror(errno));
82 		return (-1);
83 	}
84 	owinsize = winsize;
85 	if (clear) {
86 		if (mode & CANON) {
87 			/* could have removed these too - rely on defaults */
88 			termios.c_cc[VEOF] = CEOF;
89 			termios.c_cc[VEOL] = CNUL;
90 		} else {
91 			termios.c_lflag &= ECHO;
92 			termios.c_cc[VMIN] = 1;
93 			termios.c_cc[VTIME] = 0;
94 		}
95 
96 	}
97 
98 	if (options != NULL && *options != '\0') {
99 		/* just a place holder to make it look like invoking stty */
100 		argvp[0] = binstty;
101 		(void) strcpy(buf, options);
102 		mkargv(buf, &argvp[1], &cnt, MAXARGS - 1);
103 		if (aspeed != NULL && *aspeed != '\0') {
104 			argvp[cnt++] = aspeed;
105 		}
106 		argvp[cnt] = (char *)0;
107 		if ((uarg = sttyparse(cnt, argvp, term, &termio, &termios,
108 		    &termiox, &winsize)) != NULL) {
109 			log("sttyparse unknown mode: %s", uarg);
110 			return (-1);
111 		}
112 	}
113 
114 
115 	if (set_ttymode(fd, term, &termio, &termios, &stermio,
116 	    &termiox, &winsize, &owinsize) != 0) {
117 		log("set_termio: set_ttymode failed", strerror(errno));
118 		return (-1);
119 	}
120 
121 	return (0);
122 }
123 
124 #ifdef	NOT_USE
125 /*
126  *	turnon_canon	- turn on canonical processing
127  *			- return 0 if succeeds, -1 if fails
128  */
turnon_canon(int fd)129 turnon_canon(int fd)
130 {
131 	struct termio termio;
132 
133 #ifdef	DEBUG
134 	debug("in turnon_canon");
135 #endif
136 	if (ioctl(fd, TCGETA, &termio) != 0) {
137 		log("turnon_canon: TCGETA failed, fd = %d: %s", fd,
138 		    strerror(errno));
139 		return (-1);
140 	}
141 	termio.c_lflag |= (ISIG|ICANON|ECHO|ECHOE|ECHOK);
142 	termio.c_cc[VEOF] = CEOF;
143 	termio.c_cc[VEOL] = CNUL;
144 	if (ioctl(fd, TCSETA, &termio) != 0) {
145 		log("turnon_canon: TCSETA failed, fd = %d: %s", fd,
146 		    strerror(errno));
147 		return (-1);
148 	}
149 	return (0);
150 }
151 #endif
152 
153 /*
154  *	flush_input	- flush the input queue
155  */
156 void
flush_input(int fd)157 flush_input(int fd)
158 {
159 	if (ioctl(fd, I_FLUSH, FLUSHR) == -1)
160 		log("flush_input failed, fd = %d: %s", fd, strerror(errno));
161 
162 	if (ioctl(fd, TCSBRK, 1) == -1)
163 		log("drain of ouput failed, fd = %d: %s", fd, strerror(errno));
164 }
165 
166 /*
167  * push_linedisc	- if modules is not NULL, pop everything
168  *			- then push modules specified by "modules"
169  */
170 int
push_linedisc(int fd,char * modules,char * device)171 push_linedisc(
172 	int	fd,	/* fd to push modules on */
173 	char	*modules, /* ptr to a list of comma separated module names */
174 	char	*device) /* device name for printing msg */
175 {
176 	char	*p, *tp;
177 	char	buf[BUFSIZ];
178 
179 #ifdef	DEBUG
180 	debug("in push_linedisc");
181 #endif
182 	/*
183 	 * copy modules into buf so we won't mess up the original buffer
184 	 * because strtok will chop the string
185 	 */
186 	p = strcpy(buf, modules);
187 
188 	while (ioctl(fd, I_POP, 0) >= 0)  /* pop everything */
189 		;
190 	for (p = strtok(p, ","); p != NULL; p = strtok(NULL, ",")) {
191 		for (tp = p + strlen(p) - 1; tp >= p && isspace(*tp); --tp)
192 			*tp = '\0';
193 		if (ioctl(fd, I_PUSH, p) == -1) {
194 			log("push (%s) on %s failed: %s", p, device,
195 			    strerror(errno));
196 			return (-1);
197 		}
198 	}
199 	return (0);
200 }
201 
202 /*
203  *	hang_up_line	- set speed to B0. This will drop DTR
204  */
205 int
hang_up_line(int fd)206 hang_up_line(int fd)
207 {
208 	struct termio termio;
209 	struct termios termios;
210 
211 #ifdef	DEBUG
212 	debug("in hang_up_line");
213 #endif
214 	if (ioctl(fd, TCGETS, &termios) < 0) {
215 		if (ioctl(fd, TCGETA, &termio) < 0) {
216 			log("hang_up_line: TCGETA failed: %s", strerror(errno));
217 			return (-1);
218 		}
219 		termio.c_cflag &= ~CBAUD;
220 		termio.c_cflag |= B0;
221 
222 		if (ioctl(fd, TCSETA, &termio) < 0) {
223 			log("hang_up_line: TCSETA failed: %s", strerror(errno));
224 			return (-1);
225 		}
226 	} else {
227 		(void) cfsetospeed(&termios, B0);
228 
229 		if (ioctl(fd, TCSETS, &termios) < 0) {
230 			log("hang_up_line: TCSETS failed: %s", strerror(errno));
231 			return (-1);
232 		}
233 	}
234 	return (0);
235 }
236 
237 /*
238  * initial_termio	- set initial termios
239  *			- return 0 if successful, -1 if failed.
240  */
241 int
initial_termio(int fd,struct pmtab * pmptr)242 initial_termio(int fd, struct pmtab *pmptr)
243 {
244 	int	ret;
245 	struct	Gdef *speedef;
246 
247 	speedef = get_speed(pmptr->p_ttylabel);
248 	if (speedef->g_autobaud & A_FLAG) {
249 		pmptr->p_ttyflags |= A_FLAG;
250 		if (auto_termio(fd) == -1) {
251 			(void) close(fd);
252 			return (-1);
253 		}
254 	} else {
255 		if (pmptr->p_ttyflags & R_FLAG)
256 			ret = set_termio(fd, speedef->g_iflags,
257 			    NULL, TRUE, (long)RAW);
258 		else
259 			ret = set_termio(fd, speedef->g_iflags,
260 			    NULL, TRUE, (long)CANON);
261 		if (ret == -1) {
262 			log("initial termio on (%s) failed", pmptr->p_device);
263 			(void) close(fd);
264 			return (-1);
265 		}
266 	}
267 	return (0);
268 }
269