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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.36 by root, Tue Jan 17 10:59:32 2006 UTC vs.
Revision 1.48 by ayin, Thu Jan 19 10:44:44 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(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
43# include <sys/stropts.h> /* for I_PUSH */ 39# include <sys/stropts.h> /* for I_PUSH */
53# include <util.h> 49# include <util.h>
54#endif 50#endif
55 51
56#include <cstdio> 52#include <cstdio>
57#include <grp.h> 53#include <grp.h>
54
55#include "rxvtutil.h"
56#include "fdpass.h"
57#include "ptytty.h"
58 58
59///////////////////////////////////////////////////////////////////////////// 59/////////////////////////////////////////////////////////////////////////////
60 60
61/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
62 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
64/* 64/*
65 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
66 * 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.
67 * 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
68 */ 68 */
69static int 69static inline int
70get_pty (int *fd_tty, char **ttydev) 70get_pty_streams (int *fd_tty, char **ttydev)
71{ 71{
72#ifdef NO_SETOWNER_TTYDEV
72 int pfd; 73 int pfd;
73 74
75# if defined(PTYS_ARE_GETPT)
76 pfd = getpt();
77# elif defined(PTYS_ARE_POSIX)
78 pfd = posix_openpt (O_RDWR);
79# else
80 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
81# endif
82 if (pfd >= 0)
83 {
84 if (grantpt (pfd) == 0 /* change slave permissions */
85 && unlockpt (pfd) == 0)
86 { /* slave now unlocked */
87 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
88 return pfd;
89 }
90
91 close (pfd);
92 }
93#endif
94
95 return -1;
96}
97
98static inline int
99get_pty_openpty (int *fd_tty, char **ttydev)
100{
74#ifdef PTYS_ARE_OPENPTY 101#ifdef PTYS_ARE_OPENPTY
102 int pfd;
103 int res;
75 char tty_name[sizeof "/dev/pts/????\0"]; 104 char tty_name[sizeof "/dev/pts/????\0"];
76 105
77 rxvt_privileges(RESTORE);
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 112#endif
87 113
114 return -1;
115}
116
117static inline int
118get_pty__getpty (int *fd_tty, char **ttydev)
119{
88#ifdef PTYS_ARE__GETPTY 120#ifdef PTYS_ARE__GETPTY
121 int pfd;
122
89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 123 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
90 if (*ttydev != NULL) 124 if (*ttydev != NULL)
91 return pfd; 125 return pfd;
92#endif 126#endif
93 127
94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 128 return -1;
95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) 129}
96 130
97 { 131static inline int
98# ifdef PTYS_ARE_GETPT 132get_pty_ptc (int *fd_tty, char **ttydev)
99 pfd = getpt(); 133{
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 134#ifdef PTYS_ARE_PTC
135 int pfd;
136
123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
124 { 138 {
125 *ttydev = strdup (ttyname (pfd)); 139 *ttydev = strdup (ttyname (pfd));
126 return pfd; 140 return pfd;
127 } 141 }
128#endif 142#endif
129 143
144 return -1;
145}
146
147static inline int
148get_pty_clone (int *fd_tty, char **ttydev)
149{
130#ifdef PTYS_ARE_CLONE 150#ifdef PTYS_ARE_CLONE
151 int pfd;
152
131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 153 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
132 { 154 {
133 *ttydev = strdup (ptsname (pfd)); 155 *ttydev = strdup (ptsname (pfd));
134 return pfd; 156 return pfd;
135 } 157 }
136#endif 158#endif
137 159
160 return -1;
161}
162
163static inline int
164get_pty_numeric (int *fd_tty, char **ttydev)
165{
138#ifdef PTYS_ARE_NUMERIC 166#ifdef PTYS_ARE_NUMERIC
139 { 167 int pfd;
140 int idx; 168 int idx;
141 char *c1, *c2; 169 char *c1, *c2;
142 char pty_name[] = "/dev/ptyp???"; 170 char pty_name[] = "/dev/ptyp???";
143 char tty_name[] = "/dev/ttyp???"; 171 char tty_name[] = "/dev/ttyp???";
144 172
145 c1 = &(pty_name[sizeof (pty_name) - 4]); 173 c1 = &(pty_name[sizeof (pty_name) - 4]);
146 c2 = &(tty_name[sizeof (tty_name) - 4]); 174 c2 = &(tty_name[sizeof (tty_name) - 4]);
175
147 for (idx = 0; idx < 256; idx++) 176 for (idx = 0; idx < 256; idx++)
148 { 177 {
149 sprintf (c1, "%d", idx); 178 sprintf (c1, "%d", idx);
150 sprintf (c2, "%d", idx); 179 sprintf (c2, "%d", idx);
180
151 if (access (tty_name, F_OK) < 0) 181 if (access (tty_name, F_OK) < 0)
152 { 182 {
153 idx = 256; 183 idx = 256;
154 break; 184 break;
155 } 185 }
156 186
157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 187 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
158 { 188 {
159 if (access (tty_name, R_OK | W_OK) == 0) 189 if (access (tty_name, R_OK | W_OK) == 0)
160 { 190 {
161 *ttydev = strdup (tty_name); 191 *ttydev = strdup (tty_name);
162 return pfd; 192 return pfd;
163 } 193 }
164 194
165 close (pfd); 195 close (pfd);
166 } 196 }
167 } 197 }
168 }
169#endif 198#endif
170 199
200 return -1;
201}
202
203static inline int
204get_pty_searched (int *fd_tty, char **ttydev)
205{
171#ifdef PTYS_ARE_SEARCHED 206#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 207# ifndef PTYCHAR1
178# define PTYCHAR1 "pqrstuvwxyz" 208# define PTYCHAR1 "pqrstuvwxyz"
179# endif 209# endif
180# ifndef PTYCHAR2 210# ifndef PTYCHAR2
181# define PTYCHAR2 "0123456789abcdef" 211# define PTYCHAR2 "0123456789abcdef"
182# endif 212# endif
213 int pfd;
214 const char *c1, *c2;
215 char pty_name[] = "/dev/pty??";
216 char tty_name[] = "/dev/tty??";
183 217
184 for (c1 = PTYCHAR1; *c1; c1++) 218 for (c1 = PTYCHAR1; *c1; c1++)
185 { 219 {
186 pty_name[ (sizeof (pty_name) - 3)] = 220 pty_name[ (sizeof (pty_name) - 3)] =
187 tty_name[ (sizeof (pty_name) - 3)] = *c1; 221 tty_name[ (sizeof (pty_name) - 3)] = *c1;
222
188 for (c2 = PTYCHAR2; *c2; c2++) 223 for (c2 = PTYCHAR2; *c2; c2++)
189 { 224 {
190 pty_name[ (sizeof (pty_name) - 2)] = 225 pty_name[ (sizeof (pty_name) - 2)] =
191 tty_name[ (sizeof (pty_name) - 2)] = *c2; 226 tty_name[ (sizeof (pty_name) - 2)] = *c2;
227
192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 228 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
193 { 229 {
194 if (access (tty_name, R_OK | W_OK) == 0) 230 if (access (tty_name, R_OK | W_OK) == 0)
195 { 231 {
196 *ttydev = strdup (tty_name); 232 *ttydev = strdup (tty_name);
197 return pfd; 233 return pfd;
198 } 234 }
199 235
200 close (pfd); 236 close (pfd);
201 } 237 }
202 } 238 }
203 } 239 }
204 }
205#endif 240#endif
241
242 return -1;
243}
244
245static int
246get_pty (int *fd_tty, char **ttydev)
247{
248 int pfd;
249
250 if ((pfd = get_pty_streams (fd_tty, ttydev)) != -1
251 || (pfd = get_pty_openpty (fd_tty, ttydev)) != -1
252 || (pfd = get_pty__getpty (fd_tty, ttydev)) != -1
253 || (pfd = get_pty_ptc (fd_tty, ttydev)) != -1
254 || (pfd = get_pty_clone (fd_tty, ttydev)) != -1
255 || (pfd = get_pty_numeric (fd_tty, ttydev)) != -1
256 || (pfd = get_pty_searched (fd_tty, ttydev)) != -1)
257 return pfd;
206 258
207 return -1; 259 return -1;
208} 260}
209 261
210/*----------------------------------------------------------------------*/ 262/*----------------------------------------------------------------------*/
222 * Make our tty a controlling tty so that /dev/tty points to us 274 * Make our tty a controlling tty so that /dev/tty points to us
223 */ 275 */
224static int 276static int
225control_tty (int fd_tty) 277control_tty (int fd_tty)
226{ 278{
227#ifndef __QNX__
228 int fd;
229
230 /* ---------------------------------------- */
231# ifdef HAVE_SETSID
232 setsid (); 279 setsid ();
233# endif
234# if defined(HAVE_SETPGID)
235 setpgid (0, 0);
236# elif defined(HAVE_SETPGRP)
237 setpgrp (0, 0);
238# endif
239 280
240 /* ---------------------------------------- */
241# ifdef TIOCNOTTY
242 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
243 if (fd >= 0)
244 {
245 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
246 close (fd);
247 }
248# endif
249
250 /* ---------------------------------------- */
251 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
252 if (fd >= 0)
253 close (fd); /* ouch: still have controlling tty */
254
255 /* ---------------------------------------- */
256# if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 281#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
257 /* 282 /*
258 * Push STREAMS modules: 283 * Push STREAMS modules:
259 * ptem: pseudo-terminal hardware emulation module. 284 * ptem: pseudo-terminal hardware emulation module.
260 * ldterm: standard terminal line discipline. 285 * ldterm: standard terminal line discipline.
261 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 286 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
269 * documentation is really unclear about whether it is any close () on 294 * documentation is really unclear about whether it is any close () on
270 * the master side or the last close () - i.e. a proper STREAMS dismantling 295 * the master side or the last close () - i.e. a proper STREAMS dismantling
271 * close () - on the master side which causes a hang up to be sent 296 * close () - on the master side which causes a hang up to be sent
272 * through - Geoff Wing 297 * through - Geoff Wing
273 */ 298 */
274# ifdef HAVE_ISASTREAM 299# ifdef HAVE_ISASTREAM
275 if (isastream (fd_tty) == 1) 300 if (isastream (fd_tty) == 1)
276# endif 301# endif
277 { 302 {
278 ioctl (fd_tty, I_PUSH, "ptem"); 303 ioctl (fd_tty, I_PUSH, "ptem");
279 ioctl (fd_tty, I_PUSH, "ldterm"); 304 ioctl (fd_tty, I_PUSH, "ldterm");
280 ioctl (fd_tty, I_PUSH, "ttcompat"); 305 ioctl (fd_tty, I_PUSH, "ttcompat");
281 } 306 }
282# endif 307#endif
283 /* ---------------------------------------- */ 308
284 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 309 ioctl (fd_tty, TIOCSCTTY, NULL);
285 /* ---------------------------------------- */ 310
286 fd = open ("/dev/tty", O_WRONLY); 311 int fd = open ("/dev/tty", O_WRONLY);
287 if (fd < 0) 312 if (fd < 0)
288 return -1; /* fatal */ 313 return -1; /* fatal */
314
289 close (fd); 315 close (fd);
290 /* ---------------------------------------- */
291#endif /* ! __QNX__ */
292 316
293 return 0; 317 return 0;
294} 318}
295 319
296void 320void
355 } 379 }
356 else 380 else
357#endif /* TTY_GID_SUPPORT */ 381#endif /* TTY_GID_SUPPORT */
358 { 382 {
359 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; 383 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
360 gid = getgid (); 384 gid = 0;
361 } 385 }
362 } 386 }
363} ttyconf; 387} ttyconf;
364 388
365///////////////////////////////////////////////////////////////////////////// 389/////////////////////////////////////////////////////////////////////////////
368rxvt_ptytty_unix::privileges (rxvt_privaction action) 392rxvt_ptytty_unix::privileges (rxvt_privaction action)
369{ 393{
370 if (!name || !*name) 394 if (!name || !*name)
371 return; 395 return;
372 396
373 rxvt_privileges (RESTORE);
374
375 if (action == SAVE) 397 if (action == SAVE)
376 { 398 {
377# ifndef RESET_TTY_TO_COMMON_DEFAULTS 399 chown (name, getuid (), ttyconf.gid); /* fail silently */
378 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ 400 chmod (name, ttyconf.mode);
379 if (lstat (name, &savestat) < 0) /* you lose out */ 401# ifdef HAVE_REVOKE
380 ; 402 revoke (name);
381 else
382# endif 403# endif
383 {
384 saved = true;
385 chown (name, getuid (), ttyconf.gid); /* fail silently */
386 chmod (name, ttyconf.mode);
387# ifdef HAVE_REVOKE
388 revoke (name);
389# endif
390 }
391 } 404 }
392 else 405 else
393 { /* action == RESTORE */ 406 { /* action == RESTORE */
394# ifndef RESET_TTY_TO_COMMON_DEFAULTS 407 chmod (name, RESTORE_TTY_MODE);
395 if (saved)
396 {
397 chmod (name, savestat.st_mode);
398 chown (name, savestat.st_uid, savestat.st_gid);
399 }
400# else
401 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
402 chown (name, 0, 0); 408 chown (name, 0, ttyconf.gid);
403# endif
404
405 } 409 }
406
407 rxvt_privileges (IGNORE);
408} 410}
409#endif 411#endif
410 412
411rxvt_ptytty_unix::rxvt_ptytty_unix () 413rxvt_ptytty_unix::rxvt_ptytty_unix ()
412{ 414{
413 pty = tty = -1; 415 pty = tty = -1;
414 name = 0; 416 name = 0;
415#ifndef NO_SETOWNER_TTYDEV
416 saved = false;
417#endif
418#if UTMP_SUPPORT 417#if UTMP_SUPPORT
419 cmd_pid = 0; 418 cmd_pid = 0;
420#endif 419#endif
421} 420}
422 421
423rxvt_ptytty_unix::~rxvt_ptytty_unix () 422rxvt_ptytty_unix::~rxvt_ptytty_unix ()
424{ 423{
424#if UTMP_SUPPORT
425 logout (); 425 logout ();
426#endif
426 put (); 427 put ();
427} 428}
428 429
429void 430void
430rxvt_ptytty_unix::put () 431rxvt_ptytty_unix::put ()
465 } 466 }
466 467
467 return true; 468 return true;
468} 469}
469 470
471#if PTYTTY_HELPER
472
473static int sock_fd;
474static int pid;
475
476struct command
477{
478 enum { get, login, destroy } type;
479
480 rxvt_ptytty *id;
481
482 bool login_shell;
483 int cmd_pid;
484 char hostname[512]; // arbitrary, but should be plenty
485};
486
487struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty
488{
489 rxvt_ptytty *id;
490
491 ~rxvt_ptytty_proxy ();
492
493 bool get ();
494 void login (int cmd_pid, bool login_shell, const char *hostname);
495};
496
497bool
498rxvt_ptytty_proxy::get ()
499{
500 command cmd;
501
502 cmd.type = command::get;
503
504 write (sock_fd, &cmd, sizeof (cmd));
505
506 if (read (sock_fd, &id, sizeof (id)) != sizeof (id))
507 rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n");
508
509 if (!id)
510 return false;
511
512 if ((pty = rxvt_recv_fd (sock_fd)) < 0
513 || (tty = rxvt_recv_fd (sock_fd)) < 0)
514 rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n");
515
516 return true;
517}
518
519void
520rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname)
521{
522 command cmd;
523
524 cmd.type = command::login;
525 cmd.id = id;
526 cmd.cmd_pid = cmd_pid;
527 cmd.login_shell = login_shell;
528 strncpy (cmd.hostname, hostname, sizeof (cmd.hostname));
529
530 write (sock_fd, &cmd, sizeof (cmd));
531}
532
533rxvt_ptytty_proxy::~rxvt_ptytty_proxy ()
534{
535 command cmd;
536
537 cmd.type = command::destroy;
538 cmd.id = id;
539
540 write (sock_fd, &cmd, sizeof (cmd));
541}
542
543static
544void serve ()
545{
546 command cmd;
547 vector<rxvt_ptytty *> ptys;
548
549 while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command))
550 {
551 if (cmd.type == command::get)
552 {
553 // -> id ptyfd ttyfd
554 cmd.id = new rxvt_ptytty_unix;
555
556 if (cmd.id->get ())
557 {
558 write (sock_fd, &cmd.id, sizeof (cmd.id));
559 ptys.push_back (cmd.id);
560
561 rxvt_send_fd (sock_fd, cmd.id->pty);
562 rxvt_send_fd (sock_fd, cmd.id->tty);
563 }
564 else
565 {
566 delete cmd.id;
567 cmd.id = 0;
568 write (sock_fd, &cmd.id, sizeof (cmd.id));
569 }
570 }
571 else if (cmd.type == command::login)
572 {
573#if UTMP_SUPPORT
574 if (find (ptys.begin (), ptys.end (), cmd.id))
575 {
576 cmd.hostname[sizeof (cmd.hostname) - 1] = 0;
577 cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname);
578 }
579#endif
580 }
581 else if (cmd.type == command::destroy)
582 {
583 rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id);
584
585 if (pty)
586 {
587 delete *pty;
588 ptys.erase (pty);
589 }
590 }
591 else
592 break;
593 }
594
595 // destroy all ptys
596 for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); )
597 delete *i;
598}
599
600void rxvt_ptytty_server ()
601{
602 int sv[2];
603
604 if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv))
605 rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n");
606
607 pid = fork ();
608
609 if (pid < 0)
610 rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n");
611
612 if (pid)
613 {
614 // client, urxvt
615 sock_fd = sv[0];
616 close (sv[1]);
617 fcntl (sock_fd, F_SETFD, FD_CLOEXEC);
618 }
619 else
620 {
621 // server, pty-helper
622 sock_fd = sv[1];
623
624 for (int fd = 0; fd < 1023; fd++)
625 if (fd != sock_fd)
626 close (fd);
627
628 serve ();
629 _exit (EXIT_SUCCESS);
630 }
631}
632#endif
633
634// a "factory" *g*
635rxvt_ptytty *
636rxvt_new_ptytty ()
637{
638#if PTYTTY_HELPER
639 if (pid > 0)
640 // use helper process
641 return new rxvt_ptytty_proxy;
642 else
643#endif
644 return new rxvt_ptytty_unix;
645}
646
470/*----------------------- end-of-file (C source) -----------------------*/ 647/*----------------------- end-of-file (C source) -----------------------*/
471 648

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