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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.6 by pcg, Fri Feb 13 12:16:21 2004 UTC vs.
Revision 1.22 by root, Tue Jan 11 04:44:57 2005 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004 Marc Lehmann <pcg@goof.com>
7 * 8 *
8 * 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
9 * 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
10 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 12 * (at your option) any later version.
… …
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
22 23
23#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
24 26
25/*
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28
29#include <stdio.h>
30#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
31# include <stdlib.h> 28# include <cstdlib>
32#endif 29#endif
33#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
34# include <sys/types.h> 31# include <sys/types.h>
35#endif 32#endif
36#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
37# include <unistd.h> 34# include <unistd.h>
38#endif 35#endif
39#if defined(HAVE_STRING_H) 36#if defined(HAVE_STRING_H)
40# include <string.h> 37# include <cstring>
41#endif 38#endif
42#ifdef HAVE_FCNTL_H 39#ifdef HAVE_FCNTL_H
43# include <fcntl.h> 40# include <fcntl.h>
44#endif 41#endif
45#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
46# include <sys/ioctl.h> 43# include <sys/ioctl.h>
47#endif 44#endif
48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
49# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
50#endif 47#endif
51 48#ifdef HAVE_ISASTREAM
52#ifdef DEBUG_TTY 49# include <stropts.h>
53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
54#else
55# define D_TTY(x)
56#endif 50#endif
51#ifdef HAVE_PTY_H
52# include <pty.h>
53#endif
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
59# include <util.h>
60#endif
61
62#include <cstdio>
63#include <grp.h>
57 64
58/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
59 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
60 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
61/* 68/*
62 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
63 * If successful, ttydev is set to the name of the slave device. 70 * If successful, ttydev is set to the name of the slave device.
64 * fd_tty _may_ also be set to an open fd to the slave device 71 * fd_tty _may_ also be set to an open fd to the slave device
65 */ 72 */
66/* EXTPROTO */ 73static int
67int
68rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
69{ 75{
70 int pfd; 76 int pfd;
71 77
72#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
73
74 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
75 80
76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
77 { 82 {
78 *ttydev = strdup (tty_name); 83 *ttydev = strdup (tty_name);
… …
103 108
104 { 109 {
105# ifdef PTYS_ARE_GETPT 110# ifdef PTYS_ARE_GETPT
106 pfd = getpt (); 111 pfd = getpt ();
107# else 112# else
108
109 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
110# endif 114# endif
111 115
112 if (pfd >= 0) 116 if (pfd >= 0)
113 { 117 {
114 if (grantpt (pfd) == 0 /* change slave permissions */ 118 if (grantpt (pfd) == 0 /* change slave permissions */
115 && unlockpt (pfd) == 0) 119 && unlockpt (pfd) == 0)
116 { /* slave now unlocked */ 120 { /* slave now unlocked */
117 *ttydev = ptsname (pfd); /* get slave's name */ 121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
118 return pfd; 122 return pfd;
119 } 123 }
120 close (pfd); 124 close (pfd);
121 } 125 }
122 } 126 }
… …
124#endif 128#endif
125 129
126#ifdef PTYS_ARE_PTC 130#ifdef PTYS_ARE_PTC
127 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 { 132 {
129 *ttydev = ttyname (pfd); 133 *ttydev = strdup (ttyname (pfd));
130 return pfd; 134 return pfd;
131 } 135 }
132#endif 136#endif
133 137
134#ifdef PTYS_ARE_CLONE 138#ifdef PTYS_ARE_CLONE
135 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
136 { 140 {
137 *ttydev = ptsname (pfd); 141 *ttydev = strdup (ptsname (pfd));
138 return pfd; 142 return pfd;
139 } 143 }
140#endif 144#endif
141 145
142#ifdef PTYS_ARE_NUMERIC 146#ifdef PTYS_ARE_NUMERIC
143 { 147 {
144 int idx; 148 int idx;
145 char *c1, *c2; 149 char *c1, *c2;
146 char pty_name[] = "/dev/ptyp???"; 150 char pty_name[] = "/dev/ptyp???";
147 char tty_name[] = "/dev/ttyp???"; 151 char tty_name[] = "/dev/ttyp???";
148 152
149 c1 = & (pty_name[sizeof (pty_name) - 4]); 153 c1 = &(pty_name[sizeof (pty_name) - 4]);
150 c2 = & (tty_name[sizeof (tty_name) - 4]); 154 c2 = &(tty_name[sizeof (tty_name) - 4]);
151 for (idx = 0; idx < 256; idx++) 155 for (idx = 0; idx < 256; idx++)
152 { 156 {
153 sprintf (c1, "%d", idx); 157 sprintf (c1, "%d", idx);
154 sprintf (c2, "%d", idx); 158 sprintf (c2, "%d", idx);
155 if (access (tty_name, F_OK) < 0) 159 if (access (tty_name, F_OK) < 0)
156 { 160 {
157 idx = 256; 161 idx = 256;
158 break; 162 break;
159 } 163 }
164
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 { 166 {
162 if (access (tty_name, R_OK | W_OK) == 0) 167 if (access (tty_name, R_OK | W_OK) == 0)
163 { 168 {
164 *ttydev = strdup (tty_name); 169 *ttydev = strdup (tty_name);
165 return pfd; 170 return pfd;
166 } 171 }
172
167 close (pfd); 173 close (pfd);
168 } 174 }
169 } 175 }
170 } 176 }
171#endif 177#endif
178
172#ifdef PTYS_ARE_SEARCHED 179#ifdef PTYS_ARE_SEARCHED
173 { 180 {
174 const char *c1, *c2; 181 const char *c1, *c2;
175 char pty_name[] = "/dev/pty??"; 182 char pty_name[] = "/dev/pty??";
176 char tty_name[] = "/dev/tty??"; 183 char tty_name[] = "/dev/tty??";
177 184
178# ifndef PTYCHAR1 185# ifndef PTYCHAR1
179# define PTYCHAR1 "pqrstuvwxyz" 186# define PTYCHAR1 "pqrstuvwxyz"
180# endif 187# endif
181# ifndef PTYCHAR2 188# ifndef PTYCHAR2
… …
195 if (access (tty_name, R_OK | W_OK) == 0) 202 if (access (tty_name, R_OK | W_OK) == 0)
196 { 203 {
197 *ttydev = strdup (tty_name); 204 *ttydev = strdup (tty_name);
198 return pfd; 205 return pfd;
199 } 206 }
207
200 close (pfd); 208 close (pfd);
201 } 209 }
202 } 210 }
203 } 211 }
204 } 212 }
205#endif 213#endif
214
206 return -1; 215 return -1;
207} 216}
208 217
209/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
210/* 219/*
211 * Returns tty file descriptor, or -1 on failure 220 * Returns tty file descriptor, or -1 on failure
212 */ 221 */
213/* EXTPROTO */ 222static int
214int
215rxvt_get_tty (const char *ttydev) 223get_tty (char *ttydev)
216{ 224{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 225 return open (ttydev, O_RDWR | O_NOCTTY, 0);
218} 226}
219 227
220/*----------------------------------------------------------------------*/ 228/*----------------------------------------------------------------------*/
221/* 229/*
222 * Make our tty a controlling tty so that /dev/tty points to us 230 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 231 */
224/* EXTPROTO */ 232static int
225int
226rxvt_control_tty (int fd_tty, const char *ttydev) 233control_tty (int fd_tty, const char *ttydev)
227{ 234{
228#ifndef __QNX__ 235#ifndef __QNX__
229 int fd; 236 int fd;
230 237
231 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
232 /* ---------------------------------------- */ 238 /* ---------------------------------------- */
233# ifdef HAVE_SETSID 239# ifdef HAVE_SETSID
234 setsid (); 240 setsid ();
235# endif 241# endif
236# if defined(HAVE_SETPGID) 242# if defined(HAVE_SETPGID)
237 setpgid (0, 0); 243 setpgid (0, 0);
238# elif defined(HAVE_SETPGRP) 244# elif defined(HAVE_SETPGRP)
239 setpgrp (0, 0); 245 setpgrp (0, 0);
240# endif 246# endif
247
241 /* ---------------------------------------- */ 248 /* ---------------------------------------- */
242# ifdef TIOCNOTTY 249# ifdef TIOCNOTTY
243
244 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
245 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
246 if (fd >= 0) 251 if (fd >= 0)
247 { 252 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 253 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd); 254 close (fd);
250 } 255 }
251# endif 256# endif
257
252 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
255 if (fd >= 0) 260 if (fd >= 0)
256 close (fd); /* ouch: still have controlling tty */ 261 close (fd); /* ouch: still have controlling tty */
262
257 /* ---------------------------------------- */ 263 /* ---------------------------------------- */
258#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
259 /* 265 /*
260 * Push STREAMS modules: 266 * Push STREAMS modules:
261 * ptem: pseudo-terminal hardware emulation module. 267 * ptem: pseudo-terminal hardware emulation module.
… …
275 */ 281 */
276# ifdef HAVE_ISASTREAM 282# ifdef HAVE_ISASTREAM
277 if (isastream (fd_tty) == 1) 283 if (isastream (fd_tty) == 1)
278# endif 284# endif
279 { 285 {
280 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
281 ioctl (fd_tty, I_PUSH, "ptem"); 286 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 287 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 288 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 289 }
285#endif 290#endif
286 /* ---------------------------------------- */ 291 /* ---------------------------------------- */
287# if defined(TIOCSCTTY) 292# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 293 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
289 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
290# elif defined(TIOCSETCTTY) 294# elif defined(TIOCSETCTTY)
291 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
292 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
293# else 296# else
294 fd = open (ttydev, O_RDWR); 297 fd = open (ttydev, O_RDWR);
295 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
296 if (fd >= 0) 298 if (fd >= 0)
297 close (fd); 299 close (fd);
298# endif 300# endif
299 /* ---------------------------------------- */ 301 /* ---------------------------------------- */
300 fd = open ("/dev/tty", O_WRONLY); 302 fd = open ("/dev/tty", O_WRONLY);
301 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
302 if (fd < 0) 303 if (fd < 0)
303 return -1; /* fatal */ 304 return -1; /* fatal */
304 close (fd); 305 close (fd);
305 /* ---------------------------------------- */ 306 /* ---------------------------------------- */
306 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
307 /* ---------------------------------------- */
308#endif /* ! __QNX__ */ 307#endif /* ! __QNX__ */
309 308
310 return 0; 309 return 0;
311} 310}
311
312#ifndef NO_SETOWNER_TTYDEV
313static struct ttyconf {
314 gid_t gid;
315 mode_t mode;
316
317 ttyconf ()
318 {
319#ifdef TTY_GID_SUPPORT
320 struct group *gr = getgrnam ("tty");
321
322 if (gr)
323 { /* change group ownership of tty to "tty" */
324 mode = S_IRUSR | S_IWUSR | S_IWGRP;
325 gid = gr->gr_gid;
326 }
327 else
328#endif /* TTY_GID_SUPPORT */
329 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid ();
332 }
333 }
334} ttyconf;
335
336void
337rxvt_ptytty::privileges (rxvt_privaction action)
338{
339 rxvt_privileges (RESTORE);
340
341 if (action == SAVE)
342 {
343 //next_tty_action = RESTORE;
344# ifndef RESET_TTY_TO_COMMON_DEFAULTS
345 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
346 if (lstat (name, &savestat) < 0) /* you lose out */
347 ;//next_tty_action = IGNORE;
348 else
349# endif
350
351 {
352 chown (name, getuid (), ttyconf.gid); /* fail silently */
353 chmod (name, ttyconf.mode);
354# ifdef HAVE_REVOKE
355 revoke (name);
356# endif
357
358 }
359 }
360 else
361 { /* action == RESTORE */
362 //next_tty_action = IGNORE;
363# ifndef RESET_TTY_TO_COMMON_DEFAULTS
364 chmod (name, savestat.st_mode);
365 chown (name, savestat.st_uid, savestat.st_gid);
366# else
367 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
368 chown (name, 0, 0);
369# endif
370
371 }
372
373 rxvt_privileges (IGNORE);
374}
375#endif
376
377rxvt_ptytty::rxvt_ptytty ()
378{
379 pty = tty = -1;
380 name = 0;
381}
382
383rxvt_ptytty::~rxvt_ptytty ()
384{
385 put ();
386}
387
388void
389
390rxvt_ptytty::close_tty ()
391{
392 if (tty >= 0) close (tty);
393 tty = -1;
394}
395
396void
397rxvt_ptytty::put ()
398{
399#ifndef NO_SETOWNER_TTYDEV
400 if (tty >= 0)
401 privileges (RESTORE);
402#endif
403
404 if (pty >= 0) close (pty);
405 close_tty ();
406 free (name);
407
408 pty = tty = -1;
409 name = 0;
410}
411
412bool
413rxvt_ptytty::make_controlling_tty ()
414{
415 return control_tty (tty, name) >= 0;
416}
417
418bool
419rxvt_ptytty::get ()
420{
421 /* get master (pty) */
422 if ((pty = get_pty (&tty, &name)) < 0)
423 return false;
424
425 fcntl (pty, F_SETFL, O_NONBLOCK);
426
427 /* get slave (tty) */
428 if (tty < 0)
429 {
430#ifndef NO_SETOWNER_TTYDEV
431 privileges (SAVE);
432#endif
433
434 if ((tty = get_tty (name)) < 0)
435 {
436 put ();
437 return false;
438 }
439 }
440
441 return true;
442}
443
444void
445rxvt_ptytty::set_utf8_mode (bool on)
446{
447#ifdef IUTF8
448 if (pty != -1)
449 {
450 struct termios tio;
451
452 if (tcgetattr (pty, &tio) != -1)
453 {
454 tcflag_t new_cflag = tio.c_iflag;
455
456 if (on)
457 new_cflag |= IUTF8;
458 else
459 new_cflag &= ~IUTF8;
460
461 if (new_cflag != tio.c_iflag)
462 {
463 tio.c_iflag = new_cflag;
464 tcsetattr (pty, TCSANOW, &tio);
465 }
466 }
467 }
468#endif
469}
470
312/*----------------------- end-of-file (C source) -----------------------*/ 471/*----------------------- end-of-file (C source) -----------------------*/
472

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