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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.38 by root, Tue Jan 17 11:53:07 2006 UTC vs.
Revision 1.53 by ayin, Sat Jan 21 18:15:26 2006 UTC

… …
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h" 25#include "rxvt.h"
26 26
27# include <cstdlib> 27#include <cstdlib>
28# include <cstring> 28#include <cstring>
29 29
30#ifdef HAVE_SYS_TYPES_H
31# include <sys/types.h> 30#include <sys/types.h>
32#endif 31#include <sys/socket.h>
33#ifdef HAVE_UNISTD_H
34# include <unistd.h> 32#include <unistd.h>
35#endif
36#ifdef HAVE_FCNTL_H
37# include <fcntl.h> 33#include <fcntl.h>
38#endif 34
39#ifdef HAVE_SYS_IOCTL_H 35#ifdef HAVE_SYS_IOCTL_H
40# include <sys/ioctl.h> 36# include <sys/ioctl.h>
41#endif 37#endif
42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) 38#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
44#endif 40#endif
45#ifdef HAVE_ISASTREAM 41#ifdef HAVE_ISASTREAM
46# include <stropts.h> 42# include <stropts.h>
47#endif 43#endif
… …
50#elif defined(HAVE_LIBUTIL_H) 46#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h> 47# include <libutil.h>
52#elif defined(HAVE_UTIL_H) 48#elif defined(HAVE_UTIL_H)
53# include <util.h> 49# include <util.h>
54#endif 50#endif
51#ifdef TTY_GID_SUPPORT
52#include <grp.h>
53#endif
55 54
56#include <cstdio> 55#include <cstdio>
57#include <grp.h> 56
57#include "rxvtutil.h"
58#include "fdpass.h"
59#include "ptytty.h"
58 60
59///////////////////////////////////////////////////////////////////////////// 61/////////////////////////////////////////////////////////////////////////////
60 62
61/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
64/* 66/*
65 * Returns pty file descriptor, or -1 on failure 67 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 70 */
71#if defined(UNIX98_PTY)
69static int 72static int
70get_pty (int *fd_tty, char **ttydev) 73get_pty (int *fd_tty, char **ttydev)
71{ 74{
72 int pfd; 75 int pfd;
73 76
74#ifdef PTYS_ARE_OPENPTY 77# if defined(HAVE_GETPT)
75 char tty_name[sizeof "/dev/pts/????\0"]; 78 pfd = getpt();
79# elif defined(HAVE_POSIX_OPENPT)
80 pfd = posix_openpt (O_RDWR);
81# else
82 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0);
83# endif
84 if (pfd >= 0)
85 {
86 if (grantpt (pfd) == 0 /* change slave permissions */
87 && unlockpt (pfd) == 0)
88 { /* slave now unlocked */
89 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
90 return pfd;
91 }
76 92
77 rxvt_privileges(RESTORE); 93 close (pfd);
94 }
95
96 return -1;
97}
98#elif defined(HAVE_OPENPTY)
99static int
100get_pty (int *fd_tty, char **ttydev)
101{
102 int pfd;
103 int res;
104 char tty_name[32];
105
78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); 106 res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1) 107 if (res != -1)
82 { 108 {
83 *ttydev = strdup (tty_name); 109 *ttydev = strdup (tty_name);
84 return pfd; 110 return pfd;
85 } 111 }
86#endif
87 112
88#ifdef PTYS_ARE__GETPTY 113 return -1;
114}
115#elif defined(HAVE__GETPTY)
116static int
117get_pty (int *fd_tty, char **ttydev)
118{
119 int pfd;
120
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 121 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 122 if (*ttydev != NULL)
91 return pfd; 123 return pfd;
92#endif
93 124
94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 125 return -1;
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 126}
127#elif defined(HAVE_DEV_PTC)
128static int
129get_pty (int *fd_tty, char **ttydev)
130{
131 int pfd;
96 132
97 {
98# ifdef PTYS_ARE_GETPT
99 pfd = getpt();
100# else
101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
105# endif
106# endif
107
108 if (pfd >= 0)
109 {
110 if (grantpt (pfd) == 0 /* change slave permissions */
111 && unlockpt (pfd) == 0)
112 { /* slave now unlocked */
113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
114 return pfd;
115 }
116 close (pfd);
117 }
118 }
119# endif
120#endif
121
122#ifdef PTYS_ARE_PTC
123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
124 { 134 {
125 *ttydev = strdup (ttyname (pfd)); 135 *ttydev = strdup (ttyname (pfd));
126 return pfd; 136 return pfd;
127 } 137 }
128#endif
129 138
130#ifdef PTYS_ARE_CLONE 139 return -1;
140}
141#elif defined(HAVE_DEV_CLONE)
142static int
143get_pty (int *fd_tty, char **ttydev)
144{
145 int pfd;
146
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 147 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
132 { 148 {
133 *ttydev = strdup (ptsname (pfd)); 149 *ttydev = strdup (ptsname (pfd));
134 return pfd; 150 return pfd;
135 } 151 }
136#endif
137
138#ifdef PTYS_ARE_NUMERIC
139 {
140 int idx;
141 char *c1, *c2;
142 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???";
144
145 c1 = &(pty_name[sizeof (pty_name) - 4]);
146 c2 = &(tty_name[sizeof (tty_name) - 4]);
147 for (idx = 0; idx < 256; idx++)
148 {
149 sprintf (c1, "%d", idx);
150 sprintf (c2, "%d", idx);
151 if (access (tty_name, F_OK) < 0)
152 {
153 idx = 256;
154 break;
155 }
156
157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
158 {
159 if (access (tty_name, R_OK | W_OK) == 0)
160 {
161 *ttydev = strdup (tty_name);
162 return pfd;
163 }
164
165 close (pfd);
166 }
167 }
168 }
169#endif
170
171#ifdef PTYS_ARE_SEARCHED
172 {
173 const char *c1, *c2;
174 char pty_name[] = "/dev/pty??";
175 char tty_name[] = "/dev/tty??";
176
177# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz"
179# endif
180# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef"
182# endif
183
184 for (c1 = PTYCHAR1; *c1; c1++)
185 {
186 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
188 for (c2 = PTYCHAR2; *c2; c2++)
189 {
190 pty_name[ (sizeof (pty_name) - 2)] =
191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 {
194 if (access (tty_name, R_OK | W_OK) == 0)
195 {
196 *ttydev = strdup (tty_name);
197 return pfd;
198 }
199
200 close (pfd);
201 }
202 }
203 }
204 }
205#endif
206 152
207 return -1; 153 return -1;
208} 154}
155#else
156/* Based on the code in openssh/openbsd-compat/bsd-openpty.c */
157static int
158get_pty (int *fd_tty, char **ttydev)
159{
160 int pfd;
161 int i;
162 char pty_name[32];
163 char tty_name[32];
164 const char *majors = "pqrstuvwxyzabcde";
165 const char *minors = "0123456789abcdef";
166 for (i = 0; i < 256; i++)
167 {
168 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
169 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
171 {
172 snprintf(pty_name, 32, "/dev/ptyp%d", i);
173 snprintf(tty_name, 32, "/dev/ttyp%d", i);
174 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
175 continue;
176 }
177 if (access (tty_name, R_OK | W_OK) == 0)
178 {
179 *ttydev = strdup (tty_name);
180 return pfd;
181 }
182
183 close (pfd);
184 }
185}
186#endif
209 187
210/*----------------------------------------------------------------------*/ 188/*----------------------------------------------------------------------*/
211/* 189/*
212 * Returns tty file descriptor, or -1 on failure 190 * Returns tty file descriptor, or -1 on failure
213 */ 191 */
… …
222 * Make our tty a controlling tty so that /dev/tty points to us 200 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 201 */
224static int 202static int
225control_tty (int fd_tty) 203control_tty (int fd_tty)
226{ 204{
227 int fd;
228
229 /* ---------------------------------------- */
230 setsid (); 205 setsid ();
231 206
232 /* ---------------------------------------- */
233# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 207#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
234 /* 208 /*
235 * Push STREAMS modules: 209 * Push STREAMS modules:
236 * ptem: pseudo-terminal hardware emulation module. 210 * ptem: pseudo-terminal hardware emulation module.
237 * ldterm: standard terminal line discipline. 211 * ldterm: standard terminal line discipline.
238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 212 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
… …
246 * documentation is really unclear about whether it is any close () on 220 * documentation is really unclear about whether it is any close () on
247 * the master side or the last close () - i.e. a proper STREAMS dismantling 221 * the master side or the last close () - i.e. a proper STREAMS dismantling
248 * close () - on the master side which causes a hang up to be sent 222 * close () - on the master side which causes a hang up to be sent
249 * through - Geoff Wing 223 * through - Geoff Wing
250 */ 224 */
251# ifdef HAVE_ISASTREAM 225# ifdef HAVE_ISASTREAM
252 if (isastream (fd_tty) == 1) 226 if (isastream (fd_tty) == 1)
253# endif 227# endif
254 { 228 {
255 ioctl (fd_tty, I_PUSH, "ptem"); 229 ioctl (fd_tty, I_PUSH, "ptem");
256 ioctl (fd_tty, I_PUSH, "ldterm"); 230 ioctl (fd_tty, I_PUSH, "ldterm");
257 ioctl (fd_tty, I_PUSH, "ttcompat"); 231 ioctl (fd_tty, I_PUSH, "ttcompat");
258 } 232 }
259# endif 233#endif
260 /* ---------------------------------------- */ 234
261 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 235 ioctl (fd_tty, TIOCSCTTY, NULL);
262 /* ---------------------------------------- */ 236
263 fd = open ("/dev/tty", O_WRONLY); 237 int fd = open ("/dev/tty", O_WRONLY);
264 if (fd < 0) 238 if (fd < 0)
265 return -1; /* fatal */ 239 return -1; /* fatal */
240
266 close (fd); 241 close (fd);
267 /* ---------------------------------------- */
268 242
269 return 0; 243 return 0;
270} 244}
271 245
272void 246void
… …
310 } 284 }
311 } 285 }
312#endif 286#endif
313} 287}
314 288
315/////////////////////////////////////////////////////////////////////////////
316
317#ifndef NO_SETOWNER_TTYDEV
318static struct ttyconf { 289static struct ttyconf {
319 gid_t gid; 290 gid_t gid;
320 mode_t mode; 291 mode_t mode;
321 292
322 ttyconf () 293 ttyconf ()
… …
331 } 302 }
332 else 303 else
333#endif /* TTY_GID_SUPPORT */ 304#endif /* TTY_GID_SUPPORT */
334 { 305 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 306 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = getgid (); 307 gid = 0;
337 } 308 }
338 } 309 }
339} ttyconf; 310} ttyconf;
340 311
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 }
376# else
377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
378 chown (name, 0, 0);
379# endif
380
381 }
382
383 rxvt_privileges (IGNORE);
384}
385#endif
386
387rxvt_ptytty_unix::rxvt_ptytty_unix () 312rxvt_ptytty_unix::rxvt_ptytty_unix ()
388{ 313{
389 pty = tty = -1;
390 name = 0; 314 name = 0;
391#ifndef NO_SETOWNER_TTYDEV
392 saved = false;
393#endif
394#if UTMP_SUPPORT 315#if UTMP_SUPPORT
395 cmd_pid = 0; 316 cmd_pid = 0;
396#endif 317#endif
397} 318}
398 319
399rxvt_ptytty_unix::~rxvt_ptytty_unix () 320rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{ 321{
322#if UTMP_SUPPORT
401 logout (); 323 logout ();
324#endif
402 put (); 325 put ();
403} 326}
404 327
405void 328void
406rxvt_ptytty_unix::put () 329rxvt_ptytty_unix::put ()
407{ 330{
408#ifndef NO_SETOWNER_TTYDEV 331 chmod (name, RESTORE_TTY_MODE);
409 privileges (RESTORE); 332 chown (name, 0, ttyconf.gid);
410#endif
411 333
412 if (pty >= 0) close (pty);
413 close_tty (); 334 close_tty ();
335
336 if (pty >= 0)
337 close (pty);
338
414 free (name); 339 free (name);
415 340
416 pty = tty = -1; 341 pty = tty = -1;
417 name = 0; 342 name = 0;
418} 343}
… …
428 353
429 /* get slave (tty) */ 354 /* get slave (tty) */
430 if (tty < 0) 355 if (tty < 0)
431 { 356 {
432#ifndef NO_SETOWNER_TTYDEV 357#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE); 358 chown (name, getuid (), ttyconf.gid); /* fail silently */
359 chmod (name, ttyconf.mode);
360# ifdef HAVE_REVOKE
361 revoke (name);
362# endif
434#endif 363#endif
435 364
436 if ((tty = get_tty (name)) < 0) 365 if ((tty = get_tty (name)) < 0)
437 { 366 {
438 put (); 367 put ();
… …
441 } 370 }
442 371
443 return true; 372 return true;
444} 373}
445 374
375#if PTYTTY_HELPER
376
377static int sock_fd;
378static int pid;
379
380struct command
381{
382 enum { get, login, destroy } type;
383
384 rxvt_ptytty *id;
385
386 bool login_shell;
387 int cmd_pid;
388 char hostname[512]; // arbitrary, but should be plenty
389};
390
391struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
392{
393 rxvt_ptytty *id;
394
395 ~rxvt_ptytty_proxy ();
396
397 bool get ();
398 void login (int cmd_pid, bool login_shell, const char *hostname);
399};
400
401bool
402rxvt_ptytty_proxy::get ()
403{
404 command cmd;
405
406 cmd.type = command::get;
407
408 write (sock_fd, &cmd, sizeof (cmd));
409
410 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
411 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
412
413 if (!id)
414 return false;
415
416 if ((pty = rxvt_recv_fd (sock_fd)) < 0
417 || (tty = rxvt_recv_fd (sock_fd)) < 0)
418 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
419
420 return true;
421}
422
423void
424rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
425{
426 command cmd;
427
428 cmd.type = command::login;
429 cmd.id = id;
430 cmd.cmd_pid = cmd_pid;
431 cmd.login_shell = login_shell;
432 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
433
434 write (sock_fd, &cmd, sizeof (cmd));
435}
436
437rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
438{
439 command cmd;
440
441 cmd.type = command::destroy;
442 cmd.id = id;
443
444 write (sock_fd, &cmd, sizeof (cmd));
445}
446
447static
448void serve ()
449{
450 command cmd;
451 vector<rxvt_ptytty *> ptys;
452
453 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
454 {
455 if (cmd.type == command::get)
456 {
457 // -> id ptyfd ttyfd
458 cmd.id = new rxvt_ptytty_unix;
459
460 if (cmd.id->get ())
461 {
462 write (sock_fd, &cmd.id, sizeof (cmd.id));
463 ptys.push_back (cmd.id);
464
465 rxvt_send_fd (sock_fd, cmd.id->pty);
466 rxvt_send_fd (sock_fd, cmd.id->tty);
467 }
468 else
469 {
470 delete cmd.id;
471 cmd.id = 0;
472 write (sock_fd, &cmd.id, sizeof (cmd.id));
473 }
474 }
475 else if (cmd.type == command::login)
476 {
477#if UTMP_SUPPORT
478 if (find (ptys.begin (), ptys.end (), cmd.id))
479 {
480 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
481 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
482 }
483#endif
484 }
485 else if (cmd.type == command::destroy)
486 {
487 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
488
489 if (pty)
490 {
491 delete *pty;
492 ptys.erase (pty);
493 }
494 }
495 else
496 break;
497 }
498
499 // destroy all ptys
500 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
501 delete *i;
502}
503
504void rxvt_ptytty_server ()
505{
506 int sv[2];
507
508 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
509 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
510
511 pid = fork ();
512
513 if (pid < 0)
514 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
515
516 if (pid)
517 {
518 // client, urxvt
519 sock_fd = sv[0];
520 close (sv[1]);
521 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
522 }
523 else
524 {
525 // server, pty-helper
526 sock_fd = sv[1];
527
528 for (int fd = 0; fd < 1023; fd++)
529 if (fd != sock_fd)
530 close (fd);
531
532 serve ();
533 _exit (EXIT_SUCCESS);
534 }
535}
536
537#endif
538
539// a "factory" *g*
540rxvt_ptytty *
541rxvt_new_ptytty ()
542{
543#if PTYTTY_HELPER
544 if (pid > 0)
545 // use helper process
546 return new rxvt_ptytty_proxy;
547 else
548#endif
549 return new rxvt_ptytty_unix;
550}
551
446/*----------------------- end-of-file (C source) -----------------------*/ 552/*----------------------- end-of-file (C source) -----------------------*/
447 553

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