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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 1.39 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 * $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) 2004-2006 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
32# include <stdlib.h> 27# include <cstdlib>
33#endif 28# include <cstring>
29
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)
41# include <string.h>
42#endif
43#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 37# include <fcntl.h>
45#endif 38#endif
46#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 40# include <sys/ioctl.h>
48#endif 41#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
51#endif 44#endif
52 45#ifdef HAVE_ISASTREAM
53#ifdef DEBUG_TTY 46# include <stropts.h>
54# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
55#else
56# define D_TTY(x)
57#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/////////////////////////////////////////////////////////////////////////////
58 62
59/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 65 * ------------------------------------------------------------------------- */
62/* 66/*
63 * Returns pty file descriptor, or -1 on failure 67 * Returns pty file descriptor, or -1 on failure
64 * 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.
65 * 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
66 */ 70 */
67/* EXTPROTO */ 71static int
68int
69rxvt_get_pty(int *fd_tty, const char **ttydev) 72get_pty (int *fd_tty, char **ttydev)
70{ 73{
71 int pfd; 74 int pfd;
72 75
73#ifdef PTYS_ARE_OPENPTY 76#ifdef PTYS_ARE_OPENPTY
74
75 char tty_name[sizeof "/dev/pts/????\0"]; 77 char tty_name[sizeof "/dev/pts/????\0"];
76 78
79 rxvt_privileges(RESTORE);
77 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)
78 { 84 {
79 *ttydev = strdup(tty_name); 85 *ttydev = strdup (tty_name);
80 return pfd; 86 return pfd;
81 } 87 }
82#endif 88#endif
83 89
84#ifdef PTYS_ARE__GETPTY 90#ifdef PTYS_ARE__GETPTY
85 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 91 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
86 if (*ttydev != NULL) 92 if (*ttydev != NULL)
87 return pfd; 93 return pfd;
88#endif 94#endif
89 95
90#ifdef PTYS_ARE_GETPTY
91
92 char *ptydev;
93
94 while ((ptydev = getpty()) != NULL)
95 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
96 {
97 *ttydev = ptydev;
98 return pfd;
99 }
100#endif
101
102#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 96#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
103# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 97# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
104 98
105 { 99 {
106# ifdef PTYS_ARE_GETPT 100# ifdef PTYS_ARE_GETPT
107 pfd = getpt(); 101 pfd = getpt();
108# else 102# else
109 103# ifdef PTYS_ARE_POSIX
104 pfd = posix_openpt (O_RDWR);
105# else
110 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 106 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
107# endif
111# endif 108# endif
112 109
113 if (pfd >= 0) 110 if (pfd >= 0)
114 { 111 {
115 if (grantpt(pfd) == 0 /* change slave permissions */ 112 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt(pfd) == 0) 113 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */ 114 { /* slave now unlocked */
118 *ttydev = ptsname(pfd); /* get slave's name */ 115 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 116 return pfd;
120 } 117 }
121 close(pfd); 118 close (pfd);
122 } 119 }
123 } 120 }
124# endif 121# endif
125#endif 122#endif
126 123
127#ifdef PTYS_ARE_PTC 124#ifdef PTYS_ARE_PTC
128 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 125 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 { 126 {
130 *ttydev = ttyname(pfd); 127 *ttydev = strdup (ttyname (pfd));
131 return pfd; 128 return pfd;
132 } 129 }
133#endif 130#endif
134 131
135#ifdef PTYS_ARE_CLONE 132#ifdef PTYS_ARE_CLONE
136 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)
137 { 134 {
138 *ttydev = ptsname(pfd); 135 *ttydev = strdup (ptsname (pfd));
139 return pfd; 136 return pfd;
140 } 137 }
141#endif 138#endif
142 139
143#ifdef PTYS_ARE_NUMERIC 140#ifdef PTYS_ARE_NUMERIC
144 { 141 {
145 int idx; 142 int idx;
146 char *c1, *c2; 143 char *c1, *c2;
147 char pty_name[] = "/dev/ptyp???"; 144 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???"; 145 char tty_name[] = "/dev/ttyp???";
149 146
150 c1 = &(pty_name[sizeof(pty_name) - 4]); 147 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof(tty_name) - 4]); 148 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++) 149 for (idx = 0; idx < 256; idx++)
153 { 150 {
154 sprintf(c1, "%d", idx); 151 sprintf (c1, "%d", idx);
155 sprintf(c2, "%d", idx); 152 sprintf (c2, "%d", idx);
156 if (access(tty_name, F_OK) < 0) 153 if (access (tty_name, F_OK) < 0)
157 { 154 {
158 idx = 256; 155 idx = 256;
159 break; 156 break;
160 } 157 }
158
161 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 159 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
162 { 160 {
163 if (access(tty_name, R_OK | W_OK) == 0) 161 if (access (tty_name, R_OK | W_OK) == 0)
164 { 162 {
165 *ttydev = strdup(tty_name); 163 *ttydev = strdup (tty_name);
166 return pfd; 164 return pfd;
167 } 165 }
166
168 close(pfd); 167 close (pfd);
169 } 168 }
170 } 169 }
171 } 170 }
172#endif 171#endif
172
173#ifdef PTYS_ARE_SEARCHED 173#ifdef PTYS_ARE_SEARCHED
174 { 174 {
175 const char *c1, *c2; 175 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??"; 176 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??"; 177 char tty_name[] = "/dev/tty??";
178 178
179# ifndef PTYCHAR1 179# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz" 180# define PTYCHAR1 "pqrstuvwxyz"
181# endif 181# endif
182# ifndef PTYCHAR2 182# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef" 183# define PTYCHAR2 "0123456789abcdef"
184# endif 184# endif
185 185
186 for (c1 = PTYCHAR1; *c1; c1++) 186 for (c1 = PTYCHAR1; *c1; c1++)
187 { 187 {
188 pty_name[(sizeof(pty_name) - 3)] = 188 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[(sizeof(pty_name) - 3)] = *c1; 189 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++) 190 for (c2 = PTYCHAR2; *c2; c2++)
191 { 191 {
192 pty_name[(sizeof(pty_name) - 2)] = 192 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[(sizeof(pty_name) - 2)] = *c2; 193 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 194 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 { 195 {
196 if (access(tty_name, R_OK | W_OK) == 0) 196 if (access (tty_name, R_OK | W_OK) == 0)
197 { 197 {
198 *ttydev = strdup(tty_name); 198 *ttydev = strdup (tty_name);
199 return pfd; 199 return pfd;
200 } 200 }
201
201 close(pfd); 202 close (pfd);
202 } 203 }
203 } 204 }
204 } 205 }
205 } 206 }
206#endif 207#endif
208
207 return -1; 209 return -1;
208} 210}
209 211
210/*----------------------------------------------------------------------*/ 212/*----------------------------------------------------------------------*/
211/* 213/*
212 * Returns tty file descriptor, or -1 on failure 214 * Returns tty file descriptor, or -1 on failure
213 */ 215 */
214/* EXTPROTO */ 216static int
215int
216rxvt_get_tty (const char *ttydev) 217get_tty (char *ttydev)
217{ 218{
218 return open (ttydev, O_RDWR | O_NOCTTY, 0); 219 return open (ttydev, O_RDWR | O_NOCTTY, 0);
219} 220}
220 221
221/*----------------------------------------------------------------------*/ 222/*----------------------------------------------------------------------*/
222/* 223/*
223 * 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
224 */ 225 */
225/* EXTPROTO */ 226static int
226int 227control_tty (int fd_tty)
227rxvt_control_tty (int fd_tty, const char *ttydev)
228{ 228{
229#ifndef __QNX__
230 int fd; 229 int fd;
231 230
232 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
233 /* ---------------------------------------- */ 231 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 232 setsid ();
236# endif 233
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 /* ---------------------------------------- */ 234 /* ---------------------------------------- */
243# ifdef TIOCNOTTY
244
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)
248 {
249 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
250 close (fd);
251 }
252# endif
253 /* ---------------------------------------- */
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)
257 close (fd); /* ouch: still have controlling tty */
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 235# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
260 /* 236 /*
261 * Push STREAMS modules: 237 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 238 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 239 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 240 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
265 * 241 *
266 * 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
267 * (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")
268 * should make the "ptem" (or "ldterm" depending upon either which OS 244 * 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 245 * 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 246 * 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 247 * 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 248 * 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 249 * 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 250 * close () - on the master side which causes a hang up to be sent
275 * through - Geoff Wing 251 * through - Geoff Wing
276 */ 252 */
277# ifdef HAVE_ISASTREAM 253# ifdef HAVE_ISASTREAM
278 if (isastream (fd_tty) == 1) 254 if (isastream (fd_tty) == 1)
279# endif 255# endif
280 { 256 {
281 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
282 ioctl (fd_tty, I_PUSH, "ptem"); 257 ioctl (fd_tty, I_PUSH, "ptem");
283 ioctl (fd_tty, I_PUSH, "ldterm"); 258 ioctl (fd_tty, I_PUSH, "ldterm");
284 ioctl (fd_tty, I_PUSH, "ttcompat"); 259 ioctl (fd_tty, I_PUSH, "ttcompat");
285 } 260 }
286#endif 261# endif
287 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
288# if defined(TIOCSCTTY)
289 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 263 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
290 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
291# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
294# else
295 fd = open (ttydev, O_RDWR);
296 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
297 if (fd >= 0)
298 close(fd);
299# endif
300 /* ---------------------------------------- */ 264 /* ---------------------------------------- */
301 fd = open ("/dev/tty", O_WRONLY); 265 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) 266 if (fd < 0)
304 return -1; /* fatal */ 267 return -1; /* fatal */
305 close (fd); 268 close (fd);
306 /* ---------------------------------------- */ 269 /* ---------------------------------------- */
307 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
308 /* ---------------------------------------- */
309#endif /* ! __QNX__ */
310 270
311 return 0; 271 return 0;
312} 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
313/*----------------------- end-of-file (C source) -----------------------*/ 454/*----------------------- end-of-file (C source) -----------------------*/
455

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