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Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
Damien Miller95def091999-11-25 00:26:21 +11003 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Allocating a pseudo-terminal, and making it the controlling tty.
Damien Miller4af51302000-04-16 11:18:38 +10006 *
Damien Millere4340be2000-09-16 13:29:08 +11007 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
Damien Miller95def091999-11-25 00:26:21 +110012 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100013
14#include "includes.h"
Ben Lindstromc2df3ec2002-06-25 23:21:41 +000015RCSID("$OpenBSD: sshpty.c,v 1.7 2002/06/24 17:57:20 deraadt Exp $");
Damien Miller95def091999-11-25 00:26:21 +110016
Damien Miller36b339a1999-12-14 10:54:47 +110017#ifdef HAVE_UTIL_H
18# include <util.h>
19#endif /* HAVE_UTIL_H */
20
Ben Lindstromd95c09c2001-02-18 19:13:33 +000021#include "sshpty.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000022#include "log.h"
Kevin Steves974fb9c2001-06-15 00:04:23 +000023#include "misc.h"
Damien Miller356a0b01999-11-08 15:30:59 +110024
Damien Millerd4a8b7e1999-10-27 13:42:43 +100025/* Pty allocated with _getpty gets broken if we do I_PUSH:es to it. */
26#if defined(HAVE__GETPTY) || defined(HAVE_OPENPTY)
27#undef HAVE_DEV_PTMX
28#endif
29
Damien Millerfce16481999-12-08 08:53:52 +110030#ifdef HAVE_PTY_H
31# include <pty.h>
32#endif
33#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
34# include <sys/stropts.h>
35#endif
36
Damien Millerd4a8b7e1999-10-27 13:42:43 +100037#ifndef O_NOCTTY
38#define O_NOCTTY 0
39#endif
40
Damien Miller5428f641999-11-25 11:54:57 +110041/*
42 * Allocates and opens a pty. Returns 0 if no pty could be allocated, or
43 * nonzero if a pty was successfully allocated. On success, open file
44 * descriptors for the pty and tty sides and the name of the tty side are
45 * returned (the buffer must be able to hold at least 64 characters).
46 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100047
Damien Miller4af51302000-04-16 11:18:38 +100048int
Damien Miller037a0dc1999-12-07 15:38:31 +110049pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100050{
Damien Miller037a0dc1999-12-07 15:38:31 +110051#if defined(HAVE_OPENPTY) || defined(BSD4_4)
Damien Miller95def091999-11-25 00:26:21 +110052 /* openpty(3) exists in OSF/1 and some other os'es */
Damien Miller99e92432001-02-18 12:49:35 +110053 char *name;
Damien Miller95def091999-11-25 00:26:21 +110054 int i;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100055
Damien Miller99e92432001-02-18 12:49:35 +110056 i = openpty(ptyfd, ttyfd, NULL, NULL, NULL);
Damien Miller95def091999-11-25 00:26:21 +110057 if (i < 0) {
58 error("openpty: %.100s", strerror(errno));
59 return 0;
60 }
Damien Miller99e92432001-02-18 12:49:35 +110061 name = ttyname(*ttyfd);
62 if (!name)
63 fatal("openpty returns device for which ttyname fails.");
64
65 strlcpy(namebuf, name, namebuflen); /* possible truncation */
Damien Miller95def091999-11-25 00:26:21 +110066 return 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100067#else /* HAVE_OPENPTY */
68#ifdef HAVE__GETPTY
Damien Miller5428f641999-11-25 11:54:57 +110069 /*
70 * _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
71 * pty's automagically when needed
72 */
Damien Miller95def091999-11-25 00:26:21 +110073 char *slave;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100074
Damien Miller95def091999-11-25 00:26:21 +110075 slave = _getpty(ptyfd, O_RDWR, 0622, 0);
76 if (slave == NULL) {
77 error("_getpty: %.100s", strerror(errno));
78 return 0;
79 }
Damien Miller037a0dc1999-12-07 15:38:31 +110080 strlcpy(namebuf, slave, namebuflen);
Damien Miller95def091999-11-25 00:26:21 +110081 /* Open the slave side. */
82 *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
83 if (*ttyfd < 0) {
84 error("%.200s: %.100s", namebuf, strerror(errno));
85 close(*ptyfd);
86 return 0;
87 }
88 return 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100089#else /* HAVE__GETPTY */
Damien Miller76112de1999-12-21 11:18:08 +110090#if defined(HAVE_DEV_PTMX)
Damien Miller5428f641999-11-25 11:54:57 +110091 /*
92 * This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3
93 * also has bsd-style ptys, but they simply do not work.)
94 */
Damien Miller95def091999-11-25 00:26:21 +110095 int ptm;
96 char *pts;
Kevin Steves974fb9c2001-06-15 00:04:23 +000097 mysig_t old_signal;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100098
Damien Miller95def091999-11-25 00:26:21 +110099 ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY);
100 if (ptm < 0) {
101 error("/dev/ptmx: %.100s", strerror(errno));
102 return 0;
103 }
Kevin Steves974fb9c2001-06-15 00:04:23 +0000104 old_signal = mysignal(SIGCHLD, SIG_DFL);
Damien Miller95def091999-11-25 00:26:21 +1100105 if (grantpt(ptm) < 0) {
106 error("grantpt: %.100s", strerror(errno));
107 return 0;
108 }
Kevin Steves974fb9c2001-06-15 00:04:23 +0000109 mysignal(SIGCHLD, old_signal);
Damien Miller95def091999-11-25 00:26:21 +1100110 if (unlockpt(ptm) < 0) {
111 error("unlockpt: %.100s", strerror(errno));
112 return 0;
113 }
114 pts = ptsname(ptm);
115 if (pts == NULL)
116 error("Slave pty side name could not be obtained.");
Damien Miller037a0dc1999-12-07 15:38:31 +1100117 strlcpy(namebuf, pts, namebuflen);
Damien Miller95def091999-11-25 00:26:21 +1100118 *ptyfd = ptm;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000119
Damien Miller95def091999-11-25 00:26:21 +1100120 /* Open the slave side. */
121 *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
122 if (*ttyfd < 0) {
123 error("%.100s: %.100s", namebuf, strerror(errno));
124 close(*ptyfd);
125 return 0;
126 }
Damien Millerbac2d8a2000-09-05 16:13:06 +1100127#ifndef HAVE_CYGWIN
Kevin Steves85b3db62000-11-05 15:31:36 +0000128 /*
129 * Push the appropriate streams modules, as described in Solaris pts(7).
130 * HP-UX pts(7) doesn't have ttcompat module.
131 */
Damien Miller95def091999-11-25 00:26:21 +1100132 if (ioctl(*ttyfd, I_PUSH, "ptem") < 0)
133 error("ioctl I_PUSH ptem: %.100s", strerror(errno));
134 if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0)
135 error("ioctl I_PUSH ldterm: %.100s", strerror(errno));
Kevin Steves85b3db62000-11-05 15:31:36 +0000136#ifndef __hpux
Damien Miller95def091999-11-25 00:26:21 +1100137 if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0)
138 error("ioctl I_PUSH ttcompat: %.100s", strerror(errno));
Damien Millere37ac5a2000-03-17 23:58:59 +1100139#endif
Damien Millerbac2d8a2000-09-05 16:13:06 +1100140#endif
Damien Miller95def091999-11-25 00:26:21 +1100141 return 1;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000142#else /* HAVE_DEV_PTMX */
143#ifdef HAVE_DEV_PTS_AND_PTC
Damien Miller95def091999-11-25 00:26:21 +1100144 /* AIX-style pty code. */
145 const char *name;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000146
Damien Miller95def091999-11-25 00:26:21 +1100147 *ptyfd = open("/dev/ptc", O_RDWR | O_NOCTTY);
148 if (*ptyfd < 0) {
149 error("Could not open /dev/ptc: %.100s", strerror(errno));
150 return 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000151 }
Damien Miller95def091999-11-25 00:26:21 +1100152 name = ttyname(*ptyfd);
153 if (!name)
154 fatal("Open of /dev/ptc returns device for which ttyname fails.");
Damien Miller037a0dc1999-12-07 15:38:31 +1100155 strlcpy(namebuf, name, namebuflen);
Damien Miller95def091999-11-25 00:26:21 +1100156 *ttyfd = open(name, O_RDWR | O_NOCTTY);
157 if (*ttyfd < 0) {
158 error("Could not open pty slave side %.100s: %.100s",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100159 name, strerror(errno));
Damien Miller95def091999-11-25 00:26:21 +1100160 close(*ptyfd);
161 return 0;
162 }
163 return 1;
164#else /* HAVE_DEV_PTS_AND_PTC */
Ben Lindstrom232ccf72002-07-22 23:34:25 +0000165#if defined(_CRAY) && !defined(_CRAYSV2)
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000166 char buf[64];
Ben Lindstrom5a6abda2002-06-09 19:41:48 +0000167 int i;
168 int highpty;
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000169
170#ifdef _SC_CRAY_NPTY
Kevin Stevesf744b512001-08-14 20:31:49 +0000171 highpty = sysconf(_SC_CRAY_NPTY);
172 if (highpty == -1)
173 highpty = 128;
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000174#else
Kevin Stevesf744b512001-08-14 20:31:49 +0000175 highpty = 128;
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000176#endif
177
Kevin Stevesf744b512001-08-14 20:31:49 +0000178 for (i = 0; i < highpty; i++) {
179 snprintf(buf, sizeof(buf), "/dev/pty/%03d", i);
180 *ptyfd = open(buf, O_RDWR|O_NOCTTY);
181 if (*ptyfd < 0)
182 continue;
183 snprintf(namebuf, namebuflen, "/dev/ttyp%03d", i);
184 /* Open the slave side. */
185 *ttyfd = open(namebuf, O_RDWR|O_NOCTTY);
186 if (*ttyfd < 0) {
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000187 error("%.100s: %.100s", namebuf, strerror(errno));
Kevin Stevesf744b512001-08-14 20:31:49 +0000188 close(*ptyfd);
Kevin Steves25ee4e42001-08-14 20:41:34 +0000189 return 0;
Kevin Stevesf744b512001-08-14 20:31:49 +0000190 }
191 return 1;
192 }
193 return 0;
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000194#else
Damien Miller95def091999-11-25 00:26:21 +1100195 /* BSD-style pty code. */
196 char buf[64];
197 int i;
Damien Miller5428f641999-11-25 11:54:57 +1100198 const char *ptymajors = "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ";
Damien Miller95def091999-11-25 00:26:21 +1100199 const char *ptyminors = "0123456789abcdef";
200 int num_minors = strlen(ptyminors);
201 int num_ptys = strlen(ptymajors) * num_minors;
Tim Rice1e28c9e2002-05-13 17:07:18 -0700202 struct termios tio;
Damien Miller95def091999-11-25 00:26:21 +1100203
204 for (i = 0; i < num_ptys; i++) {
205 snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors],
206 ptyminors[i % num_minors]);
Damien Millera34a28b1999-12-14 10:47:15 +1100207 snprintf(namebuf, namebuflen, "/dev/tty%c%c",
Damien Miller037a0dc1999-12-07 15:38:31 +1100208 ptymajors[i / num_minors], ptyminors[i % num_minors]);
Damien Miller95def091999-11-25 00:26:21 +1100209
Damien Miller6d8c11f2000-08-29 11:52:38 +1100210 *ptyfd = open(buf, O_RDWR | O_NOCTTY);
211 if (*ptyfd < 0) {
212 /* Try SCO style naming */
213 snprintf(buf, sizeof buf, "/dev/ptyp%d", i);
214 snprintf(namebuf, namebuflen, "/dev/ttyp%d", i);
215 *ptyfd = open(buf, O_RDWR | O_NOCTTY);
216 if (*ptyfd < 0)
217 continue;
Kevin Stevesef4eea92001-02-05 12:42:17 +0000218 }
219
Damien Miller95def091999-11-25 00:26:21 +1100220 /* Open the slave side. */
221 *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
222 if (*ttyfd < 0) {
223 error("%.100s: %.100s", namebuf, strerror(errno));
224 close(*ptyfd);
225 return 0;
226 }
Tim Rice1e28c9e2002-05-13 17:07:18 -0700227 /* set tty modes to a sane state for broken clients */
228 if (tcgetattr(*ptyfd, &tio) < 0)
229 log("Getting tty modes for pty failed: %.100s", strerror(errno));
230 else {
231 tio.c_lflag |= (ECHO | ISIG | ICANON);
232 tio.c_oflag |= (OPOST | ONLCR);
233 tio.c_iflag |= ICRNL;
234
235 /* Set the new modes for the terminal. */
236 if (tcsetattr(*ptyfd, TCSANOW, &tio) < 0)
237 log("Setting tty modes for pty failed: %.100s", strerror(errno));
238 }
239
Damien Miller95def091999-11-25 00:26:21 +1100240 return 1;
241 }
242 return 0;
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000243#endif /* CRAY */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000244#endif /* HAVE_DEV_PTS_AND_PTC */
245#endif /* HAVE_DEV_PTMX */
246#endif /* HAVE__GETPTY */
247#endif /* HAVE_OPENPTY */
248}
249
Damien Miller95def091999-11-25 00:26:21 +1100250/* Releases the tty. Its ownership is returned to root, and permissions to 0666. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000251
Damien Miller4af51302000-04-16 11:18:38 +1000252void
Damien Miller95def091999-11-25 00:26:21 +1100253pty_release(const char *ttyname)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000254{
Damien Miller204ad072000-03-02 23:56:12 +1100255 if (chown(ttyname, (uid_t) 0, (gid_t) 0) < 0)
Damien Millerc7d8dbb2000-03-02 23:30:53 +1100256 error("chown %.100s 0 0 failed: %.100s", ttyname, strerror(errno));
Damien Miller204ad072000-03-02 23:56:12 +1100257 if (chmod(ttyname, (mode_t) 0666) < 0)
Damien Millerc7d8dbb2000-03-02 23:30:53 +1100258 error("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000259}
260
261/* Makes the tty the processes controlling tty and sets it to sane modes. */
262
Damien Miller4af51302000-04-16 11:18:38 +1000263void
Damien Miller95def091999-11-25 00:26:21 +1100264pty_make_controlling_tty(int *ttyfd, const char *ttyname)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000265{
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000266 int fd;
Damien Miller4a820ea2001-10-12 19:15:48 +1000267#ifdef USE_VHANGUP
268 void *old;
269#endif /* USE_VHANGUP */
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000270
Ben Lindstrom232ccf72002-07-22 23:34:25 +0000271#if defined(_CRAY) && !defined(_CRAYSV2)
Kevin Stevesf744b512001-08-14 20:31:49 +0000272 if (setsid() < 0)
273 error("setsid: %.100s", strerror(errno));
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000274
Kevin Stevesf744b512001-08-14 20:31:49 +0000275 fd = open(ttyname, O_RDWR|O_NOCTTY);
276 if (fd != -1) {
Damien Miller4a820ea2001-10-12 19:15:48 +1000277 mysignal(SIGHUP, SIG_IGN);
Kevin Stevesf744b512001-08-14 20:31:49 +0000278 ioctl(fd, TCVHUP, (char *)NULL);
Damien Miller4a820ea2001-10-12 19:15:48 +1000279 mysignal(SIGHUP, SIG_DFL);
Kevin Stevesf744b512001-08-14 20:31:49 +0000280 setpgid(0, 0);
281 close(fd);
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000282 } else {
Kevin Stevesf744b512001-08-14 20:31:49 +0000283 error("Failed to disconnect from controlling tty.");
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000284 }
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000285
Kevin Stevesf744b512001-08-14 20:31:49 +0000286 debug("Setting controlling tty using TCSETCTTY.");
287 ioctl(*ttyfd, TCSETCTTY, NULL);
288 fd = open("/dev/tty", O_RDWR);
289 if (fd < 0)
290 error("%.100s: %.100s", ttyname, strerror(errno));
Ben Lindstrom6db66ff2001-08-06 23:29:16 +0000291 close(*ttyfd);
Ben Lindstrom5a6abda2002-06-09 19:41:48 +0000292 *ttyfd = fd;
Damien Miller4a820ea2001-10-12 19:15:48 +1000293#else /* _CRAY */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000294
Damien Miller95def091999-11-25 00:26:21 +1100295 /* First disconnect from the old controlling tty. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000296#ifdef TIOCNOTTY
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000297 fd = open(_PATH_TTY, O_RDWR | O_NOCTTY);
Damien Miller95def091999-11-25 00:26:21 +1100298 if (fd >= 0) {
299 (void) ioctl(fd, TIOCNOTTY, NULL);
300 close(fd);
301 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000302#endif /* TIOCNOTTY */
Damien Miller95def091999-11-25 00:26:21 +1100303 if (setsid() < 0)
304 error("setsid: %.100s", strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000305
Damien Miller5428f641999-11-25 11:54:57 +1100306 /*
307 * Verify that we are successfully disconnected from the controlling
308 * tty.
309 */
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000310 fd = open(_PATH_TTY, O_RDWR | O_NOCTTY);
Damien Miller95def091999-11-25 00:26:21 +1100311 if (fd >= 0) {
312 error("Failed to disconnect from controlling tty.");
313 close(fd);
314 }
315 /* Make it our controlling tty. */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000316#ifdef TIOCSCTTY
Damien Miller95def091999-11-25 00:26:21 +1100317 debug("Setting controlling tty using TIOCSCTTY.");
Kevin Steves6c0d6272000-11-12 09:22:29 +0000318 if (ioctl(*ttyfd, TIOCSCTTY, NULL) < 0)
319 error("ioctl(TIOCSCTTY): %.100s", strerror(errno));
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000320#endif /* TIOCSCTTY */
Ben Lindstromb5628642000-10-18 00:02:25 +0000321#ifdef HAVE_NEWS4
322 if (setpgrp(0,0) < 0)
323 error("SETPGRP %s",strerror(errno));
324#endif /* HAVE_NEWS4 */
Damien Millerbac2d8a2000-09-05 16:13:06 +1100325#ifdef USE_VHANGUP
Damien Miller4a820ea2001-10-12 19:15:48 +1000326 old = mysignal(SIGHUP, SIG_IGN);
Damien Millerd0cff3e2000-04-20 23:12:58 +1000327 vhangup();
Damien Miller4a820ea2001-10-12 19:15:48 +1000328 mysignal(SIGHUP, old);
Damien Millerbac2d8a2000-09-05 16:13:06 +1100329#endif /* USE_VHANGUP */
Damien Miller95def091999-11-25 00:26:21 +1100330 fd = open(ttyname, O_RDWR);
Damien Millerd0cff3e2000-04-20 23:12:58 +1000331 if (fd < 0) {
Damien Miller95def091999-11-25 00:26:21 +1100332 error("%.100s: %.100s", ttyname, strerror(errno));
Damien Millerd0cff3e2000-04-20 23:12:58 +1000333 } else {
Damien Millerbac2d8a2000-09-05 16:13:06 +1100334#ifdef USE_VHANGUP
Damien Millerd0cff3e2000-04-20 23:12:58 +1000335 close(*ttyfd);
336 *ttyfd = fd;
Damien Millerbac2d8a2000-09-05 16:13:06 +1100337#else /* USE_VHANGUP */
Damien Miller95def091999-11-25 00:26:21 +1100338 close(fd);
Damien Millerbac2d8a2000-09-05 16:13:06 +1100339#endif /* USE_VHANGUP */
Damien Millerd0cff3e2000-04-20 23:12:58 +1000340 }
Damien Miller95def091999-11-25 00:26:21 +1100341 /* Verify that we now have a controlling tty. */
Ben Lindstrom31ca54a2001-02-09 02:11:24 +0000342 fd = open(_PATH_TTY, O_WRONLY);
Damien Miller95def091999-11-25 00:26:21 +1100343 if (fd < 0)
344 error("open /dev/tty failed - could not set controlling tty: %.100s",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100345 strerror(errno));
Ben Lindstrom8ada5d02002-06-23 21:42:50 +0000346 else
Damien Miller95def091999-11-25 00:26:21 +1100347 close(fd);
Damien Miller4a820ea2001-10-12 19:15:48 +1000348#endif /* _CRAY */
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000349}
350
351/* Changes the window size associated with the pty. */
352
Damien Miller4af51302000-04-16 11:18:38 +1000353void
Damien Miller95def091999-11-25 00:26:21 +1100354pty_change_window_size(int ptyfd, int row, int col,
Damien Miller9f0f5c62001-12-21 14:45:46 +1100355 int xpixel, int ypixel)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000356{
Damien Miller95def091999-11-25 00:26:21 +1100357 struct winsize w;
Ben Lindstrom8ada5d02002-06-23 21:42:50 +0000358
Damien Miller95def091999-11-25 00:26:21 +1100359 w.ws_row = row;
360 w.ws_col = col;
361 w.ws_xpixel = xpixel;
362 w.ws_ypixel = ypixel;
363 (void) ioctl(ptyfd, TIOCSWINSZ, &w);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000364}
Damien Millerc7d8dbb2000-03-02 23:30:53 +1100365
366void
367pty_setowner(struct passwd *pw, const char *ttyname)
368{
369 struct group *grp;
370 gid_t gid;
371 mode_t mode;
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000372 struct stat st;
Damien Millerc7d8dbb2000-03-02 23:30:53 +1100373
374 /* Determine the group to make the owner of the tty. */
375 grp = getgrnam("tty");
376 if (grp) {
377 gid = grp->gr_gid;
378 mode = S_IRUSR | S_IWUSR | S_IWGRP;
379 } else {
380 gid = pw->pw_gid;
381 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
382 }
383
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000384 /*
385 * Change owner and mode of the tty as required.
Ben Lindstromc88785e2001-08-06 20:47:23 +0000386 * Warn but continue if filesystem is read-only and the uids match/
387 * tty is owned by root.
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000388 */
389 if (stat(ttyname, &st))
390 fatal("stat(%.100s) failed: %.100s", ttyname,
391 strerror(errno));
392
393 if (st.st_uid != pw->pw_uid || st.st_gid != gid) {
394 if (chown(ttyname, pw->pw_uid, gid) < 0) {
Damien Miller9f0f5c62001-12-21 14:45:46 +1100395 if (errno == EROFS &&
Ben Lindstrom8ada5d02002-06-23 21:42:50 +0000396 (st.st_uid == pw->pw_uid || st.st_uid == 0))
Ben Lindstrom5c385522002-06-23 21:23:20 +0000397 error("chown(%.100s, %u, %u) failed: %.100s",
Ben Lindstromc2df3ec2002-06-25 23:21:41 +0000398 ttyname, (u_int)pw->pw_uid, (u_int)gid,
Damien Miller9f0f5c62001-12-21 14:45:46 +1100399 strerror(errno));
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000400 else
Ben Lindstrom5c385522002-06-23 21:23:20 +0000401 fatal("chown(%.100s, %u, %u) failed: %.100s",
Ben Lindstromc2df3ec2002-06-25 23:21:41 +0000402 ttyname, (u_int)pw->pw_uid, (u_int)gid,
Damien Miller9f0f5c62001-12-21 14:45:46 +1100403 strerror(errno));
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000404 }
405 }
406
407 if ((st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO)) != mode) {
408 if (chmod(ttyname, mode) < 0) {
409 if (errno == EROFS &&
410 (st.st_mode & (S_IRGRP | S_IROTH)) == 0)
411 error("chmod(%.100s, 0%o) failed: %.100s",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100412 ttyname, mode, strerror(errno));
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000413 else
414 fatal("chmod(%.100s, 0%o) failed: %.100s",
Damien Miller9f0f5c62001-12-21 14:45:46 +1100415 ttyname, mode, strerror(errno));
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000416 }
417 }
Damien Millerc7d8dbb2000-03-02 23:30:53 +1100418}