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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.4 by pcg, Tue Dec 2 21:49:46 2003 UTC vs.
Revision 1.16 by root, Sun Aug 15 03:30:04 2004 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.4 2003/12/02 21:49:46 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 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 27#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 28# include <cstdlib>
33#endif 29#endif
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) 36#if defined(HAVE_STRING_H)
41# include <string.h> 37# include <cstring>
42#endif 38#endif
43#ifdef HAVE_FCNTL_H 39#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 40# include <fcntl.h>
45#endif 41#endif
46#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 43# include <sys/ioctl.h>
48#endif 44#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
51#endif 47#endif
52 48#ifdef HAVE_ISASTREAM
53#ifdef DEBUG_TTY 49# include <stropts.h>
54# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
55#else
56# define D_TTY(x)
57#endif 50#endif
51
52#if defined( __FreeBSD__)
53// better do this via configure, but....
54# include <libutil.h>
55#endif
56
57#include <cstdio>
58#include <grp.h>
58 59
59/* ------------------------------------------------------------------------- * 60/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 61 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 62 * ------------------------------------------------------------------------- */
62/* 63/*
63 * Returns pty file descriptor, or -1 on failure 64 * Returns pty file descriptor, or -1 on failure
64 * If successful, ttydev is set to the name of the slave device. 65 * If successful, ttydev is set to the name of the slave device.
65 * fd_tty _may_ also be set to an open fd to the slave device 66 * fd_tty _may_ also be set to an open fd to the slave device
66 */ 67 */
67/* EXTPROTO */ 68static int
68int
69rxvt_get_pty(int *fd_tty, const char **ttydev) 69get_pty (int *fd_tty, char **ttydev)
70{ 70{
71 int pfd; 71 int pfd;
72 72
73#ifdef PTYS_ARE_OPENPTY 73#ifdef PTYS_ARE_OPENPTY
74
75 char tty_name[sizeof "/dev/pts/????\0"]; 74 char tty_name[sizeof "/dev/pts/????\0"];
76 75
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) 76 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
78 { 77 {
79 *ttydev = strdup(tty_name); 78 *ttydev = strdup (tty_name);
80 return pfd; 79 return pfd;
81 } 80 }
82#endif 81#endif
83 82
84#ifdef PTYS_ARE__GETPTY 83#ifdef PTYS_ARE__GETPTY
85 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 84 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
86 if (*ttydev != NULL) 85 if (*ttydev != NULL)
87 return pfd; 86 return pfd;
88#endif 87#endif
89 88
90#ifdef PTYS_ARE_GETPTY 89#ifdef PTYS_ARE_GETPTY
91 90
92 char *ptydev; 91 char *ptydev;
93 92
94 while ((ptydev = getpty()) != NULL) 93 while ((ptydev = getpty ()) != NULL)
95 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 94 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
96 { 95 {
97 *ttydev = ptydev; 96 *ttydev = ptydev;
98 return pfd; 97 return pfd;
99 } 98 }
100#endif 99#endif
… …
102#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
103# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
104 103
105 { 104 {
106# ifdef PTYS_ARE_GETPT 105# ifdef PTYS_ARE_GETPT
107 pfd = getpt(); 106 pfd = getpt ();
108# else 107# else
109
110 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 108 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
111# endif 109# endif
112 110
113 if (pfd >= 0) 111 if (pfd >= 0)
114 { 112 {
115 if (grantpt(pfd) == 0 /* change slave permissions */ 113 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt(pfd) == 0) 114 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */ 115 { /* slave now unlocked */
118 *ttydev = ptsname(pfd); /* get slave's name */ 116 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 117 return pfd;
120 } 118 }
121 close(pfd); 119 close (pfd);
122 } 120 }
123 } 121 }
124# endif 122# endif
125#endif 123#endif
126 124
127#ifdef PTYS_ARE_PTC 125#ifdef PTYS_ARE_PTC
128 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 126 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 { 127 {
130 *ttydev = ttyname(pfd); 128 *ttydev = strdup (ttyname (pfd));
131 return pfd; 129 return pfd;
132 } 130 }
133#endif 131#endif
134 132
135#ifdef PTYS_ARE_CLONE 133#ifdef PTYS_ARE_CLONE
136 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 135 {
138 *ttydev = ptsname(pfd); 136 *ttydev = strdup (ptsname (pfd));
139 return pfd; 137 return pfd;
140 } 138 }
141#endif 139#endif
142 140
143#ifdef PTYS_ARE_NUMERIC 141#ifdef PTYS_ARE_NUMERIC
144 { 142 {
145 int idx; 143 int idx;
146 char *c1, *c2; 144 char *c1, *c2;
147 char pty_name[] = "/dev/ptyp???"; 145 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???"; 146 char tty_name[] = "/dev/ttyp???";
149 147
150 c1 = &(pty_name[sizeof(pty_name) - 4]); 148 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof(tty_name) - 4]); 149 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++) 150 for (idx = 0; idx < 256; idx++)
153 { 151 {
154 sprintf(c1, "%d", idx); 152 sprintf (c1, "%d", idx);
155 sprintf(c2, "%d", idx); 153 sprintf (c2, "%d", idx);
156 if (access(tty_name, F_OK) < 0) 154 if (access (tty_name, F_OK) < 0)
157 { 155 {
158 idx = 256; 156 idx = 256;
159 break; 157 break;
160 } 158 }
159
161 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
162 { 161 {
163 if (access(tty_name, R_OK | W_OK) == 0) 162 if (access (tty_name, R_OK | W_OK) == 0)
164 { 163 {
165 *ttydev = strdup(tty_name); 164 *ttydev = strdup (tty_name);
166 return pfd; 165 return pfd;
167 } 166 }
167
168 close(pfd); 168 close (pfd);
169 } 169 }
170 } 170 }
171 } 171 }
172#endif 172#endif
173
173#ifdef PTYS_ARE_SEARCHED 174#ifdef PTYS_ARE_SEARCHED
174 { 175 {
175 const char *c1, *c2; 176 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??"; 177 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??"; 178 char tty_name[] = "/dev/tty??";
178 179
179# ifndef PTYCHAR1 180# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz" 181# define PTYCHAR1 "pqrstuvwxyz"
181# endif 182# endif
182# ifndef PTYCHAR2 183# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef" 184# define PTYCHAR2 "0123456789abcdef"
184# endif 185# endif
185 186
186 for (c1 = PTYCHAR1; *c1; c1++) 187 for (c1 = PTYCHAR1; *c1; c1++)
187 { 188 {
188 pty_name[(sizeof(pty_name) - 3)] = 189 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[(sizeof(pty_name) - 3)] = *c1; 190 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++) 191 for (c2 = PTYCHAR2; *c2; c2++)
191 { 192 {
192 pty_name[(sizeof(pty_name) - 2)] = 193 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[(sizeof(pty_name) - 2)] = *c2; 194 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 195 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 { 196 {
196 if (access(tty_name, R_OK | W_OK) == 0) 197 if (access (tty_name, R_OK | W_OK) == 0)
197 { 198 {
198 *ttydev = strdup(tty_name); 199 *ttydev = strdup (tty_name);
199 return pfd; 200 return pfd;
200 } 201 }
202
201 close(pfd); 203 close (pfd);
202 } 204 }
203 } 205 }
204 } 206 }
205 } 207 }
206#endif 208#endif
209
207 return -1; 210 return -1;
208} 211}
209 212
210/*----------------------------------------------------------------------*/ 213/*----------------------------------------------------------------------*/
211/* 214/*
212 * Returns tty file descriptor, or -1 on failure 215 * Returns tty file descriptor, or -1 on failure
213 */ 216 */
214/* EXTPROTO */ 217static int
215int
216rxvt_get_tty (const char *ttydev) 218get_tty (char *ttydev)
217{ 219{
218 return open (ttydev, O_RDWR | O_NOCTTY, 0); 220 return open (ttydev, O_RDWR | O_NOCTTY, 0);
219} 221}
220 222
221/*----------------------------------------------------------------------*/ 223/*----------------------------------------------------------------------*/
222/* 224/*
223 * Make our tty a controlling tty so that /dev/tty points to us 225 * Make our tty a controlling tty so that /dev/tty points to us
224 */ 226 */
225/* EXTPROTO */ 227static int
226int
227rxvt_control_tty (int fd_tty, const char *ttydev) 228control_tty (int fd_tty, const char *ttydev)
228{ 229{
229#ifndef __QNX__ 230#ifndef __QNX__
230 int fd; 231 int fd;
231 232
232 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
233 /* ---------------------------------------- */ 233 /* ---------------------------------------- */
234# ifdef HAVE_SETSID 234# ifdef HAVE_SETSID
235 setsid (); 235 setsid ();
236# endif 236# endif
237# if defined(HAVE_SETPGID) 237# if defined(HAVE_SETPGID)
238 setpgid (0, 0); 238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP) 239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0); 240 setpgrp (0, 0);
241# endif 241# endif
242
242 /* ---------------------------------------- */ 243 /* ---------------------------------------- */
243# ifdef TIOCNOTTY 244# ifdef TIOCNOTTY
244
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
247 if (fd >= 0) 246 if (fd >= 0)
248 { 247 {
249 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
250 close (fd); 249 close (fd);
251 } 250 }
252# endif 251# endif
252
253 /* ---------------------------------------- */ 253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
256 if (fd >= 0) 255 if (fd >= 0)
257 close (fd); /* ouch: still have controlling tty */ 256 close (fd); /* ouch: still have controlling tty */
257
258 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
260 /* 260 /*
261 * Push STREAMS modules: 261 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 262 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 263 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
265 * 265 *
266 * After we push the STREAMS modules, the first open() on the slave side 266 * After we push the STREAMS modules, the first open () on the slave side
267 * (i.e. the next section between the dashes giving us "tty opened OK") 267 * (i.e. the next section between the dashes giving us "tty opened OK")
268 * should make the "ptem" (or "ldterm" depending upon either which OS 268 * should make the "ptem" (or "ldterm" depending upon either which OS
269 * version or which set of manual pages you have) module give us a 269 * version or which set of manual pages you have) module give us a
270 * controlling terminal. We must already have close()d the master side 270 * controlling terminal. We must already have close ()d the master side
271 * fd in this child process before we push STREAMS modules on because the 271 * fd in this child process before we push STREAMS modules on because the
272 * documentation is really unclear about whether it is any close() on 272 * documentation is really unclear about whether it is any close () on
273 * the master side or the last close() - i.e. a proper STREAMS dismantling 273 * the master side or the last close () - i.e. a proper STREAMS dismantling
274 * close() - on the master side which causes a hang up to be sent 274 * close () - on the master side which causes a hang up to be sent
275 * through - Geoff Wing 275 * through - Geoff Wing
276 */ 276 */
277# ifdef HAVE_ISASTREAM 277# ifdef HAVE_ISASTREAM
278 if (isastream (fd_tty) == 1) 278 if (isastream (fd_tty) == 1)
279# endif 279# endif
280 { 280 {
281 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
282 ioctl (fd_tty, I_PUSH, "ptem"); 281 ioctl (fd_tty, I_PUSH, "ptem");
283 ioctl (fd_tty, I_PUSH, "ldterm"); 282 ioctl (fd_tty, I_PUSH, "ldterm");
284 ioctl (fd_tty, I_PUSH, "ttcompat"); 283 ioctl (fd_tty, I_PUSH, "ttcompat");
285 } 284 }
286#endif 285#endif
287 /* ---------------------------------------- */ 286 /* ---------------------------------------- */
288# if defined(TIOCSCTTY) 287# if defined(TIOCSCTTY)
289 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 288 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
290 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
291# elif defined(TIOCSETCTTY) 289# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 290 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
294# else 291# else
295 fd = open (ttydev, O_RDWR); 292 fd = open (ttydev, O_RDWR);
296 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
297 if (fd >= 0) 293 if (fd >= 0)
298 close(fd); 294 close (fd);
299# endif 295# endif
300 /* ---------------------------------------- */ 296 /* ---------------------------------------- */
301 fd = open ("/dev/tty", O_WRONLY); 297 fd = open ("/dev/tty", O_WRONLY);
302 D_TTY ((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
303 if (fd < 0) 298 if (fd < 0)
304 return -1; /* fatal */ 299 return -1; /* fatal */
305 close (fd); 300 close (fd);
306 /* ---------------------------------------- */ 301 /* ---------------------------------------- */
307 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
308 /* ---------------------------------------- */
309#endif /* ! __QNX__ */ 302#endif /* ! __QNX__ */
310 303
311 return 0; 304 return 0;
312} 305}
306
307#ifndef NO_SETOWNER_TTYDEV
308static struct ttyconf {
309 gid_t gid;
310 mode_t mode;
311
312 ttyconf ()
313 {
314#ifdef TTY_GID_SUPPORT
315 struct group *gr = getgrnam ("tty");
316
317 if (gr)
318 { /* change group ownership of tty to "tty" */
319 mode = S_IRUSR | S_IWUSR | S_IWGRP;
320 gid = gr->gr_gid;
321 }
322 else
323#endif /* TTY_GID_SUPPORT */
324 {
325 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
326 gid = getgid ();
327 }
328 }
329} ttyconf;
330
331void
332rxvt_ptytty::privileges (rxvt_privaction action)
333{
334 rxvt_privileges (RESTORE);
335
336 if (action == SAVE)
337 {
338 //next_tty_action = RESTORE;
339# ifndef RESET_TTY_TO_COMMON_DEFAULTS
340 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
341 if (lstat (name, &savestat) < 0) /* you lose out */
342 ;//next_tty_action = IGNORE;
343 else
344# endif
345
346 {
347 chown (name, getuid (), ttyconf.gid); /* fail silently */
348 chmod (name, ttyconf.mode);
349# ifdef HAVE_REVOKE
350 revoke (name);
351# endif
352
353 }
354 }
355 else
356 { /* action == RESTORE */
357 //next_tty_action = IGNORE;
358# ifndef RESET_TTY_TO_COMMON_DEFAULTS
359 chmod (name, savestat.st_mode);
360 chown (name, savestat.st_uid, savestat.st_gid);
361# else
362 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
363 chown (name, 0, 0);
364# endif
365
366 }
367
368 rxvt_privileges (IGNORE);
369}
370#endif
371
372rxvt_ptytty::rxvt_ptytty ()
373{
374 pty = tty = -1;
375 name = 0;
376}
377
378rxvt_ptytty::~rxvt_ptytty ()
379{
380 put ();
381}
382
383void
384
385rxvt_ptytty::close_tty ()
386{
387 if (tty >= 0) close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 if (tty >= 0)
396 privileges (RESTORE);
397#endif
398
399 if (pty >= 0) close (pty);
400 close_tty ();
401 free (name);
402
403 pty = tty = -1;
404 name = 0;
405}
406
407bool
408rxvt_ptytty::make_controlling_tty ()
409{
410 return control_tty (tty, name) >= 0;
411}
412
413bool
414rxvt_ptytty::get ()
415{
416 /* get master (pty) */
417 if ((pty = get_pty (&tty, &name)) < 0)
418 return false;
419
420 fcntl (pty, F_SETFL, O_NONBLOCK);
421
422 /* get slave (tty) */
423 if (tty < 0)
424 {
425#ifndef NO_SETOWNER_TTYDEV
426 privileges (SAVE);
427#endif
428
429 if ((tty = get_tty (name)) < 0)
430 {
431 put ();
432 return false;
433 }
434 }
435
436 return true;
437}
438
313/*----------------------- end-of-file (C source) -----------------------*/ 439/*----------------------- end-of-file (C source) -----------------------*/
440

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