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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 2003 UTC vs.
Revision 1.38 by root, Tue Jan 17 11:53:07 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.1 2003/11/24 17:28:08 pcg Exp $
5 * 4 *
6 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
7 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com>
8 * 8 *
9 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 12 * (at your option) any later version.
… …
20 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
25 26
26/*
27 * Try to be self-contained except for the above autoconfig'd defines
28 */
29
30#include <stdio.h>
31#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 27# include <cstdlib>
33#endif 28# include <cstring>
29
34#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
35# include <sys/types.h> 31# include <sys/types.h>
36#endif 32#endif
37#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
38# include <unistd.h> 34# include <unistd.h>
39#endif 35#endif
40#if defined(HAVE_STRING_H)
41# include <string.h>
42#endif
43#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 37# include <fcntl.h>
45#endif 38#endif
46#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 40# include <sys/ioctl.h>
48#endif 41#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
51#endif 44#endif
52 45#ifdef HAVE_ISASTREAM
53 46# include <stropts.h>
54#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else
57# define D_TTY(x)
58#endif 47#endif
48#if defined(HAVE_PTY_H)
49# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h>
52#elif defined(HAVE_UTIL_H)
53# include <util.h>
54#endif
55
56#include <cstdio>
57#include <grp.h>
58
59/////////////////////////////////////////////////////////////////////////////
59 60
60/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
61 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
62 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
63/* 64/*
64 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
65 * If successful, ttydev is set to the name of the slave device. 66 * If successful, ttydev is set to the name of the slave device.
66 * fd_tty _may_ also be set to an open fd to the slave device 67 * fd_tty _may_ also be set to an open fd to the slave device
67 */ 68 */
68/* EXTPROTO */ 69static int
69int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 70get_pty (int *fd_tty, char **ttydev)
71{ 71{
72 int pfd; 72 int pfd;
73 73
74#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
75 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
76 76
77 rxvt_privileges(RESTORE);
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1)
82 {
78 *ttydev = strdup(tty_name); 83 *ttydev = strdup (tty_name);
79 return pfd; 84 return pfd;
80 } 85 }
81#endif 86#endif
82 87
83#ifdef PTYS_ARE__GETPTY 88#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NDELAY | O_NOCTTY, 0622, 0); 89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 90 if (*ttydev != NULL)
86 return pfd;
87#endif
88
89#ifdef PTYS_ARE_GETPTY
90 char *ptydev;
91
92 while ((ptydev = getpty()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) {
94 *ttydev = ptydev;
95 return pfd; 91 return pfd;
96 }
97#endif 92#endif
98 93
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
96
101 { 97 {
102# ifdef PTYS_ARE_GETPT 98# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 99 pfd = getpt();
104# else 100# else
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 105# endif
106# endif
107
107 if (pfd >= 0) { 108 if (pfd >= 0)
109 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 110 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 111 && unlockpt (pfd) == 0)
112 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
111 return pfd; 114 return pfd;
112 } 115 }
113 close(pfd); 116 close (pfd);
114 }
115 } 117 }
118 }
116# endif 119# endif
117#endif 120#endif
118 121
119#ifdef PTYS_ARE_PTC 122#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
121 *ttydev = ttyname(pfd); 124 {
125 *ttydev = strdup (ttyname (pfd));
122 return pfd; 126 return pfd;
123 } 127 }
124#endif 128#endif
125 129
126#ifdef PTYS_ARE_CLONE 130#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
128 *ttydev = ptsname(pfd); 132 {
133 *ttydev = strdup (ptsname (pfd));
129 return pfd; 134 return pfd;
130 } 135 }
131#endif 136#endif
132 137
133#ifdef PTYS_ARE_NUMERIC 138#ifdef PTYS_ARE_NUMERIC
134 { 139 {
135 int idx; 140 int idx;
136 char *c1, *c2; 141 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 142 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 143 char tty_name[] = "/dev/ttyp???";
139 144
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 145 c1 = &(pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 146 c2 = &(tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 147 for (idx = 0; idx < 256; idx++)
148 {
143 sprintf(c1, "%d", idx); 149 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 150 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 151 if (access (tty_name, F_OK) < 0)
146 idx = 256; 152 {
147 break; 153 idx = 256;
148 } 154 break;
155 }
156
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
158 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 159 if (access (tty_name, R_OK | W_OK) == 0)
160 {
151 *ttydev = strdup(tty_name); 161 *ttydev = strdup (tty_name);
152 return pfd; 162 return pfd;
153 } 163 }
154 close(pfd); 164
155 } 165 close (pfd);
156 } 166 }
157 } 167 }
168 }
158#endif 169#endif
170
159#ifdef PTYS_ARE_SEARCHED 171#ifdef PTYS_ARE_SEARCHED
160 { 172 {
161 const char *c1, *c2; 173 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 174 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 175 char tty_name[] = "/dev/tty??";
164 176
165# ifndef PTYCHAR1 177# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 178# define PTYCHAR1 "pqrstuvwxyz"
167# endif 179# endif
168# ifndef PTYCHAR2 180# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 181# define PTYCHAR2 "0123456789abcdef"
170# endif 182# endif
183
171 for (c1 = PTYCHAR1; *c1; c1++) { 184 for (c1 = PTYCHAR1; *c1; c1++)
185 {
172 pty_name[(sizeof(pty_name) - 3)] = 186 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 188 for (c2 = PTYCHAR2; *c2; c2++)
189 {
175 pty_name[(sizeof(pty_name) - 2)] = 190 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 194 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 195 {
180 return pfd; 196 *ttydev = strdup (tty_name);
181 } 197 return pfd;
182 close(pfd); 198 }
183 } 199
184 } 200 close (pfd);
185 } 201 }
202 }
186 } 203 }
204 }
187#endif 205#endif
206
188 return -1; 207 return -1;
189} 208}
190 209
191/*----------------------------------------------------------------------*/ 210/*----------------------------------------------------------------------*/
192/* 211/*
193 * Returns tty file descriptor, or -1 on failure 212 * Returns tty file descriptor, or -1 on failure
194 */ 213 */
195/* EXTPROTO */ 214static int
196int
197rxvt_get_tty(const char *ttydev) 215get_tty (char *ttydev)
198{ 216{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 217 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 218}
201 219
202/*----------------------------------------------------------------------*/ 220/*----------------------------------------------------------------------*/
203/* 221/*
204 * Make our tty a controlling tty so that /dev/tty points to us 222 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 223 */
206/* EXTPROTO */ 224static int
207int 225control_tty (int fd_tty)
208rxvt_control_tty(int fd_tty, const char *ttydev)
209{ 226{
210#ifndef __QNX__ 227 int fd;
211 int fd;
212 228
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 229 /* ---------------------------------------- */
215# ifdef HAVE_SETSID
216 setsid(); 230 setsid ();
217# endif 231
218# if defined(HAVE_SETPGID)
219 setpgid(0, 0);
220# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0);
222# endif
223/* ---------------------------------------- */ 232 /* ---------------------------------------- */
224# ifdef TIOCNOTTY
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd);
230 }
231# endif
232/* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY);
234 D_TTY((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */
237/* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 234 /*
240 * Push STREAMS modules: 235 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 239 *
245 * After we push the STREAMS modules, the first open() on the slave side 240 * After we push the STREAMS modules, the first open () on the slave side
246 * (i.e. the next section between the dashes giving us "tty opened OK") 241 * (i.e. the next section between the dashes giving us "tty opened OK")
247 * should make the "ptem" (or "ldterm" depending upon either which OS 242 * should make the "ptem" (or "ldterm" depending upon either which OS
248 * version or which set of manual pages you have) module give us a 243 * version or which set of manual pages you have) module give us a
249 * controlling terminal. We must already have close()d the master side 244 * controlling terminal. We must already have close ()d the master side
250 * fd in this child process before we push STREAMS modules on because the 245 * fd in this child process before we push STREAMS modules on because the
251 * documentation is really unclear about whether it is any close() on 246 * documentation is really unclear about whether it is any close () on
252 * the master side or the last close() - i.e. a proper STREAMS dismantling 247 * the master side or the last close () - i.e. a proper STREAMS dismantling
253 * close() - on the master side which causes a hang up to be sent 248 * close () - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 249 * through - Geoff Wing
255 */ 250 */
256# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
258# endif 253# endif
259 { 254 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
264 } 258 }
265#endif 259# endif
266/* ---------------------------------------- */ 260 /* ---------------------------------------- */
267# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 261 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 262 /* ---------------------------------------- */
270# elif defined(TIOCSETCTTY) 263 fd = open ("/dev/tty", O_WRONLY);
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 264 if (fd < 0)
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); 265 return -1; /* fatal */
266 close (fd);
267 /* ---------------------------------------- */
268
269 return 0;
270}
271
272void
273rxvt_ptytty::close_tty ()
274{
275 if (tty < 0)
276 return;
277
278 close (tty);
279 tty = -1;
280}
281
282bool
283rxvt_ptytty::make_controlling_tty ()
284{
285 return control_tty (tty) >= 0;
286}
287
288void
289rxvt_ptytty::set_utf8_mode (bool on)
290{
291#ifdef IUTF8
292 if (pty < 0)
293 return;
294
295 struct termios tio;
296
297 if (tcgetattr (pty, &tio) != -1)
298 {
299 tcflag_t new_cflag = tio.c_iflag;
300
301 if (on)
302 new_cflag |= IUTF8;
303 else
304 new_cflag &= ~IUTF8;
305
306 if (new_cflag != tio.c_iflag)
307 {
308 tio.c_iflag = new_cflag;
309 tcsetattr (pty, TCSANOW, &tio);
310 }
311 }
312#endif
313}
314
315/////////////////////////////////////////////////////////////////////////////
316
317#ifndef NO_SETOWNER_TTYDEV
318static struct ttyconf {
319 gid_t gid;
320 mode_t mode;
321
322 ttyconf ()
323 {
324#ifdef TTY_GID_SUPPORT
325 struct group *gr = getgrnam ("tty");
326
327 if (gr)
328 { /* change group ownership of tty to "tty" */
329 mode = S_IRUSR | S_IWUSR | S_IWGRP;
330 gid = gr->gr_gid;
331 }
332 else
333#endif /* TTY_GID_SUPPORT */
334 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = getgid ();
337 }
338 }
339} ttyconf;
340
341/////////////////////////////////////////////////////////////////////////////
342
343void
344rxvt_ptytty_unix::privileges (rxvt_privaction action)
345{
346 if (!name || !*name)
347 return;
348
349 rxvt_privileges (RESTORE);
350
351 if (action == SAVE)
352 {
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
355 if (lstat (name, &savestat) < 0) /* you lose out */
356 ;
357 else
358# endif
359 {
360 saved = true;
361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
366 }
367 }
368 else
369 { /* action == RESTORE */
370# ifndef RESET_TTY_TO_COMMON_DEFAULTS
371 if (saved)
372 {
373 chmod (name, savestat.st_mode);
374 chown (name, savestat.st_uid, savestat.st_gid);
375 }
273# else 376# else
274 fd = open(ttydev, O_RDWR); 377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); 378 chown (name, 0, 0);
276 if (fd >= 0) 379# endif
277 close(fd); 380
381 }
382
383 rxvt_privileges (IGNORE);
384}
278# endif 385#endif
279/* ---------------------------------------- */ 386
280 fd = open("/dev/tty", O_WRONLY); 387rxvt_ptytty_unix::rxvt_ptytty_unix ()
281 D_TTY((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); 388{
282 if (fd < 0) 389 pty = tty = -1;
283 return -1; /* fatal */ 390 name = 0;
284 close(fd); 391#ifndef NO_SETOWNER_TTYDEV
285/* ---------------------------------------- */ 392 saved = false;
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 393#endif
287/* ---------------------------------------- */ 394#if UTMP_SUPPORT
288#endif /* ! __QNX__ */ 395 cmd_pid = 0;
396#endif
397}
398
399rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{
401 logout ();
402 put ();
403}
404
405void
406rxvt_ptytty_unix::put ()
407{
408#ifndef NO_SETOWNER_TTYDEV
409 privileges (RESTORE);
410#endif
411
412 if (pty >= 0) close (pty);
413 close_tty ();
414 free (name);
415
416 pty = tty = -1;
417 name = 0;
418}
419
420bool
421rxvt_ptytty_unix::get ()
422{
423 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0)
289 return 0; 425 return false;
426
427 fcntl (pty, F_SETFL, O_NONBLOCK);
428
429 /* get slave (tty) */
430 if (tty < 0)
431 {
432#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE);
434#endif
435
436 if ((tty = get_tty (name)) < 0)
437 {
438 put ();
439 return false;
440 }
441 }
442
443 return true;
290} 444}
445
291/*----------------------- end-of-file (C source) -----------------------*/ 446/*----------------------- end-of-file (C source) -----------------------*/
447

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