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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.5 by pcg, Sat Jan 31 03:27:45 2004 UTC vs.
Revision 1.39 by root, Tue Jan 17 12:22:59 2006 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) 2004-2006 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
31# include <stdlib.h> 27# include <cstdlib>
32#endif 28# include <cstring>
29
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)
40# include <string.h>
41#endif
42#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
43# include <fcntl.h> 37# include <fcntl.h>
44#endif 38#endif
45#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
46# include <sys/ioctl.h> 40# include <sys/ioctl.h>
47#endif 41#endif
48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
49# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
50#endif 44#endif
51 45#ifdef HAVE_ISASTREAM
52#ifdef DEBUG_TTY 46# include <stropts.h>
53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
54#else
55# define D_TTY(x)
56#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#include "ptytty.h"
60
61/////////////////////////////////////////////////////////////////////////////
57 62
58/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
59 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
60 * ------------------------------------------------------------------------- */ 65 * ------------------------------------------------------------------------- */
61/* 66/*
62 * Returns pty file descriptor, or -1 on failure 67 * Returns pty file descriptor, or -1 on failure
63 * If successful, ttydev is set to the name of the slave device. 68 * 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 69 * fd_tty _may_ also be set to an open fd to the slave device
65 */ 70 */
66/* EXTPROTO */ 71static int
67int
68rxvt_get_pty(int *fd_tty, const char **ttydev) 72get_pty (int *fd_tty, char **ttydev)
69{ 73{
70 int pfd; 74 int pfd;
71 75
72#ifdef PTYS_ARE_OPENPTY 76#ifdef PTYS_ARE_OPENPTY
73
74 char tty_name[sizeof "/dev/pts/????\0"]; 77 char tty_name[sizeof "/dev/pts/????\0"];
75 78
79 rxvt_privileges(RESTORE);
76 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) 80 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
81 rxvt_privileges(IGNORE);
82
83 if (res != -1)
77 { 84 {
78 *ttydev = strdup(tty_name); 85 *ttydev = strdup (tty_name);
79 return pfd; 86 return pfd;
80 } 87 }
81#endif 88#endif
82 89
83#ifdef PTYS_ARE__GETPTY 90#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 92 if (*ttydev != NULL)
86 return pfd; 93 return pfd;
87#endif 94#endif
88 95
89#ifdef PTYS_ARE_GETPTY
90
91 char *ptydev;
92
93 while ((ptydev = getpty()) != NULL)
94 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
96 *ttydev = ptydev;
97 return pfd;
98 }
99#endif
100
101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
103 98
104 { 99 {
105# ifdef PTYS_ARE_GETPT 100# ifdef PTYS_ARE_GETPT
106 pfd = getpt(); 101 pfd = getpt();
107# else 102# else
108 103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR);
105# else
109 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
107# endif
110# endif 108# endif
111 109
112 if (pfd >= 0) 110 if (pfd >= 0)
113 { 111 {
114 if (grantpt(pfd) == 0 /* change slave permissions */ 112 if (grantpt (pfd) == 0 /* change slave permissions */
115 && unlockpt(pfd) == 0) 113 && unlockpt (pfd) == 0)
116 { /* slave now unlocked */ 114 { /* slave now unlocked */
117 *ttydev = ptsname(pfd); /* get slave's name */ 115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
118 return pfd; 116 return pfd;
119 } 117 }
120 close(pfd); 118 close (pfd);
121 } 119 }
122 } 120 }
123# endif 121# endif
124#endif 122#endif
125 123
126#ifdef PTYS_ARE_PTC 124#ifdef PTYS_ARE_PTC
127 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 { 126 {
129 *ttydev = ttyname(pfd); 127 *ttydev = strdup (ttyname (pfd));
130 return pfd; 128 return pfd;
131 } 129 }
132#endif 130#endif
133 131
134#ifdef PTYS_ARE_CLONE 132#ifdef PTYS_ARE_CLONE
135 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 133 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
136 { 134 {
137 *ttydev = ptsname(pfd); 135 *ttydev = strdup (ptsname (pfd));
138 return pfd; 136 return pfd;
139 } 137 }
140#endif 138#endif
141 139
142#ifdef PTYS_ARE_NUMERIC 140#ifdef PTYS_ARE_NUMERIC
143 { 141 {
144 int idx; 142 int idx;
145 char *c1, *c2; 143 char *c1, *c2;
146 char pty_name[] = "/dev/ptyp???"; 144 char pty_name[] = "/dev/ptyp???";
147 char tty_name[] = "/dev/ttyp???"; 145 char tty_name[] = "/dev/ttyp???";
148 146
149 c1 = &(pty_name[sizeof(pty_name) - 4]); 147 c1 = &(pty_name[sizeof (pty_name) - 4]);
150 c2 = &(tty_name[sizeof(tty_name) - 4]); 148 c2 = &(tty_name[sizeof (tty_name) - 4]);
151 for (idx = 0; idx < 256; idx++) 149 for (idx = 0; idx < 256; idx++)
152 { 150 {
153 sprintf(c1, "%d", idx); 151 sprintf (c1, "%d", idx);
154 sprintf(c2, "%d", idx); 152 sprintf (c2, "%d", idx);
155 if (access(tty_name, F_OK) < 0) 153 if (access (tty_name, F_OK) < 0)
156 { 154 {
157 idx = 256; 155 idx = 256;
158 break; 156 break;
159 } 157 }
158
160 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 { 160 {
162 if (access(tty_name, R_OK | W_OK) == 0) 161 if (access (tty_name, R_OK | W_OK) == 0)
163 { 162 {
164 *ttydev = strdup(tty_name); 163 *ttydev = strdup (tty_name);
165 return pfd; 164 return pfd;
166 } 165 }
166
167 close(pfd); 167 close (pfd);
168 } 168 }
169 } 169 }
170 } 170 }
171#endif 171#endif
172
172#ifdef PTYS_ARE_SEARCHED 173#ifdef PTYS_ARE_SEARCHED
173 { 174 {
174 const char *c1, *c2; 175 const char *c1, *c2;
175 char pty_name[] = "/dev/pty??"; 176 char pty_name[] = "/dev/pty??";
176 char tty_name[] = "/dev/tty??"; 177 char tty_name[] = "/dev/tty??";
177 178
178# ifndef PTYCHAR1 179# ifndef PTYCHAR1
179# define PTYCHAR1 "pqrstuvwxyz" 180# define PTYCHAR1 "pqrstuvwxyz"
180# endif 181# endif
181# ifndef PTYCHAR2 182# ifndef PTYCHAR2
182# define PTYCHAR2 "0123456789abcdef" 183# define PTYCHAR2 "0123456789abcdef"
183# endif 184# endif
184 185
185 for (c1 = PTYCHAR1; *c1; c1++) 186 for (c1 = PTYCHAR1; *c1; c1++)
186 { 187 {
187 pty_name[(sizeof(pty_name) - 3)] = 188 pty_name[ (sizeof (pty_name) - 3)] =
188 tty_name[(sizeof(pty_name) - 3)] = *c1; 189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
189 for (c2 = PTYCHAR2; *c2; c2++) 190 for (c2 = PTYCHAR2; *c2; c2++)
190 { 191 {
191 pty_name[(sizeof(pty_name) - 2)] = 192 pty_name[ (sizeof (pty_name) - 2)] =
192 tty_name[(sizeof(pty_name) - 2)] = *c2; 193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
193 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
194 { 195 {
195 if (access(tty_name, R_OK | W_OK) == 0) 196 if (access (tty_name, R_OK | W_OK) == 0)
196 { 197 {
197 *ttydev = strdup(tty_name); 198 *ttydev = strdup (tty_name);
198 return pfd; 199 return pfd;
199 } 200 }
201
200 close(pfd); 202 close (pfd);
201 } 203 }
202 } 204 }
203 } 205 }
204 } 206 }
205#endif 207#endif
208
206 return -1; 209 return -1;
207} 210}
208 211
209/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
210/* 213/*
211 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
212 */ 215 */
213/* EXTPROTO */ 216static int
214int
215rxvt_get_tty (const char *ttydev) 217get_tty (char *ttydev)
216{ 218{
217 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
218} 220}
219 221
220/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
221/* 223/*
222 * Make our tty a controlling tty so that /dev/tty points to us 224 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 225 */
224/* EXTPROTO */ 226static int
225int 227control_tty (int fd_tty)
226rxvt_control_tty (int fd_tty, const char *ttydev)
227{ 228{
228#ifndef __QNX__
229 int fd; 229 int fd;
230 230
231 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
232 /* ---------------------------------------- */ 231 /* ---------------------------------------- */
233# ifdef HAVE_SETSID
234 setsid (); 232 setsid ();
235# endif 233
236# if defined(HAVE_SETPGID)
237 setpgid (0, 0);
238# elif defined(HAVE_SETPGRP)
239 setpgrp (0, 0);
240# endif
241 /* ---------------------------------------- */ 234 /* ---------------------------------------- */
242# ifdef TIOCNOTTY
243
244 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)
247 {
248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
249 close (fd);
250 }
251# endif
252 /* ---------------------------------------- */
253 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)
256 close (fd); /* ouch: still have controlling tty */
257 /* ---------------------------------------- */
258#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
259 /* 236 /*
260 * Push STREAMS modules: 237 * Push STREAMS modules:
261 * ptem: pseudo-terminal hardware emulation module. 238 * ptem: pseudo-terminal hardware emulation module.
262 * ldterm: standard terminal line discipline. 239 * ldterm: standard terminal line discipline.
263 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
264 * 241 *
265 * After we push the STREAMS modules, the first open() on the slave side 242 * After we push the STREAMS modules, the first open () on the slave side
266 * (i.e. the next section between the dashes giving us "tty opened OK") 243 * (i.e. the next section between the dashes giving us "tty opened OK")
267 * should make the "ptem" (or "ldterm" depending upon either which OS 244 * should make the "ptem" (or "ldterm" depending upon either which OS
268 * version or which set of manual pages you have) module give us a 245 * version or which set of manual pages you have) module give us a
269 * controlling terminal. We must already have close()d the master side 246 * controlling terminal. We must already have close ()d the master side
270 * fd in this child process before we push STREAMS modules on because the 247 * fd in this child process before we push STREAMS modules on because the
271 * documentation is really unclear about whether it is any close() on 248 * documentation is really unclear about whether it is any close () on
272 * the master side or the last close() - i.e. a proper STREAMS dismantling 249 * the master side or the last close () - i.e. a proper STREAMS dismantling
273 * close() - on the master side which causes a hang up to be sent 250 * close () - on the master side which causes a hang up to be sent
274 * through - Geoff Wing 251 * through - Geoff Wing
275 */ 252 */
276# ifdef HAVE_ISASTREAM 253# ifdef HAVE_ISASTREAM
277 if (isastream (fd_tty) == 1) 254 if (isastream (fd_tty) == 1)
278# endif 255# endif
279 { 256 {
280 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
281 ioctl (fd_tty, I_PUSH, "ptem"); 257 ioctl (fd_tty, I_PUSH, "ptem");
282 ioctl (fd_tty, I_PUSH, "ldterm"); 258 ioctl (fd_tty, I_PUSH, "ldterm");
283 ioctl (fd_tty, I_PUSH, "ttcompat"); 259 ioctl (fd_tty, I_PUSH, "ttcompat");
284 } 260 }
285#endif 261# endif
286 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
287# if defined(TIOCSCTTY)
288 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 263 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
289 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
290# elif defined(TIOCSETCTTY)
291 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
292 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
293# else
294 fd = open (ttydev, O_RDWR);
295 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
296 if (fd >= 0)
297 close(fd);
298# endif
299 /* ---------------------------------------- */ 264 /* ---------------------------------------- */
300 fd = open ("/dev/tty", O_WRONLY); 265 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) 266 if (fd < 0)
303 return -1; /* fatal */ 267 return -1; /* fatal */
304 close (fd); 268 close (fd);
305 /* ---------------------------------------- */ 269 /* ---------------------------------------- */
306 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
307 /* ---------------------------------------- */
308#endif /* ! __QNX__ */
309 270
310 return 0; 271 return 0;
311} 272}
273
274void
275rxvt_ptytty::close_tty ()
276{
277 if (tty < 0)
278 return;
279
280 close (tty);
281 tty = -1;
282}
283
284bool
285rxvt_ptytty::make_controlling_tty ()
286{
287 return control_tty (tty) >= 0;
288}
289
290void
291rxvt_ptytty::set_utf8_mode (bool on)
292{
293#ifdef IUTF8
294 if (pty < 0)
295 return;
296
297 struct termios tio;
298
299 if (tcgetattr (pty, &tio) != -1)
300 {
301 tcflag_t new_cflag = tio.c_iflag;
302
303 if (on)
304 new_cflag |= IUTF8;
305 else
306 new_cflag &= ~IUTF8;
307
308 if (new_cflag != tio.c_iflag)
309 {
310 tio.c_iflag = new_cflag;
311 tcsetattr (pty, TCSANOW, &tio);
312 }
313 }
314#endif
315}
316
317/////////////////////////////////////////////////////////////////////////////
318
319#ifndef NO_SETOWNER_TTYDEV
320static struct ttyconf {
321 gid_t gid;
322 mode_t mode;
323
324 ttyconf ()
325 {
326#ifdef TTY_GID_SUPPORT
327 struct group *gr = getgrnam ("tty");
328
329 if (gr)
330 { /* change group ownership of tty to "tty" */
331 mode = S_IRUSR | S_IWUSR | S_IWGRP;
332 gid = gr->gr_gid;
333 }
334 else
335#endif /* TTY_GID_SUPPORT */
336 {
337 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
338 gid = getgid ();
339 }
340 }
341} ttyconf;
342
343/////////////////////////////////////////////////////////////////////////////
344
345void
346rxvt_ptytty_unix::privileges (rxvt_privaction action)
347{
348 if (!name || !*name)
349 return;
350
351 rxvt_privileges (RESTORE);
352
353 if (action == SAVE)
354 {
355# ifndef RESET_TTY_TO_COMMON_DEFAULTS
356 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
357 if (lstat (name, &savestat) < 0) /* you lose out */
358 ;
359 else
360# endif
361 {
362 saved = true;
363 chown (name, getuid (), ttyconf.gid); /* fail silently */
364 chmod (name, ttyconf.mode);
365# ifdef HAVE_REVOKE
366 revoke (name);
367# endif
368 }
369 }
370 else
371 { /* action == RESTORE */
372# ifndef RESET_TTY_TO_COMMON_DEFAULTS
373 if (saved)
374 {
375 chmod (name, savestat.st_mode);
376 chown (name, savestat.st_uid, savestat.st_gid);
377 }
378# else
379 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
380 chown (name, 0, 0);
381# endif
382
383 }
384
385 rxvt_privileges (IGNORE);
386}
387#endif
388
389rxvt_ptytty_unix::rxvt_ptytty_unix ()
390{
391 pty = tty = -1;
392 name = 0;
393#ifndef NO_SETOWNER_TTYDEV
394 saved = false;
395#endif
396#if UTMP_SUPPORT
397 cmd_pid = 0;
398#endif
399}
400
401rxvt_ptytty_unix::~rxvt_ptytty_unix ()
402{
403 logout ();
404 put ();
405}
406
407void
408rxvt_ptytty_unix::put ()
409{
410#ifndef NO_SETOWNER_TTYDEV
411 privileges (RESTORE);
412#endif
413
414 if (pty >= 0) close (pty);
415 close_tty ();
416 free (name);
417
418 pty = tty = -1;
419 name = 0;
420}
421
422bool
423rxvt_ptytty_unix::get ()
424{
425 /* get master (pty) */
426 if ((pty = get_pty (&tty, &name)) < 0)
427 return false;
428
429 fcntl (pty, F_SETFL, O_NONBLOCK);
430
431 /* get slave (tty) */
432 if (tty < 0)
433 {
434#ifndef NO_SETOWNER_TTYDEV
435 privileges (SAVE);
436#endif
437
438 if ((tty = get_tty (name)) < 0)
439 {
440 put ();
441 return false;
442 }
443 }
444
445 return true;
446}
447
448// a "factory" *g*
449rxvt_ptytty *rxvt_new_ptytty ()
450{
451 return new rxvt_ptytty_unix;
452}
453
312/*----------------------- end-of-file (C source) -----------------------*/ 454/*----------------------- end-of-file (C source) -----------------------*/
455

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