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Comparing libptytty/src/ptytty.C (file contents):
Revision 1.37 by sf-exg, Sun Mar 28 08:39:34 2010 UTC vs.
Revision 1.46 by sf-exg, Tue Dec 20 21:03:21 2011 UTC

… …
5 * File: ptytty.C 5 * File: ptytty.C
6 *----------------------------------------------------------------------* 6 *----------------------------------------------------------------------*
7 * 7 *
8 * All portions of code are copyright by their respective author/s. 8 * All portions of code are copyright by their respective author/s.
9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 9 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
10 * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> 10 * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de>
11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> 11 * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it>
12 * 12 *
13 * This program is free software; you can redistribute it and/or modify 13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by 14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or 15 * the Free Software Foundation; either version 2 of the License, or
… …
28#include "config.h" 28#include "config.h"
29 29
30#include "ptytty.h" 30#include "ptytty.h"
31 31
32#include <cstdlib> 32#include <cstdlib>
33#include <cstdio>
33#include <cstring> 34#include <cstring>
34#include <csignal>
35 35
36#include <sys/types.h> 36#include <sys/types.h>
37#include <sys/stat.h> 37#include <sys/stat.h>
38#include <unistd.h> 38#include <unistd.h>
39#include <fcntl.h> 39#include <fcntl.h>
40 40
41#ifdef HAVE_SYS_IOCTL_H 41#ifdef HAVE_SYS_IOCTL_H
42# include <sys/ioctl.h> 42# include <sys/ioctl.h>
43#endif 43#endif
44#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) 44#if defined(HAVE_SYS_STROPTS_H)
45# include <sys/stropts.h> /* for I_PUSH */ 45# include <sys/stropts.h> /* for I_PUSH */
46#endif 46#endif
47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) 47#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
48# include <stropts.h> 48# include <stropts.h>
49#endif 49#endif
… …
55# include <util.h> 55# include <util.h>
56#endif 56#endif
57#ifdef TTY_GID_SUPPORT 57#ifdef TTY_GID_SUPPORT
58#include <grp.h> 58#include <grp.h>
59#endif 59#endif
60
61#include <cstdio>
62 60
63///////////////////////////////////////////////////////////////////////////// 61/////////////////////////////////////////////////////////////////////////////
64 62
65/* ------------------------------------------------------------------------- * 63/* ------------------------------------------------------------------------- *
66 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 64 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
… …
76 get_pty (int *fd_tty, char **ttydev) 74 get_pty (int *fd_tty, char **ttydev)
77 { 75 {
78 int pfd; 76 int pfd;
79 77
80# if defined(HAVE_GETPT) 78# if defined(HAVE_GETPT)
81 pfd = getpt(); 79 pfd = getpt ();
82# elif defined(HAVE_POSIX_OPENPT) 80# elif defined(HAVE_POSIX_OPENPT)
83 pfd = posix_openpt (O_RDWR); 81 pfd = posix_openpt (O_RDWR | O_NOCTTY);
84# else 82# else
83# ifdef _AIX
85 pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); 84 pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0);
85# else
86 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
87# endif
86# endif 88# endif
87 89
88 if (pfd >= 0) 90 if (pfd >= 0)
89 { 91 {
90 if (grantpt (pfd) == 0 /* change slave permissions */ 92 if (grantpt (pfd) == 0 /* change slave permissions */
… …
126 get_pty (int *fd_tty, char **ttydev) 128 get_pty (int *fd_tty, char **ttydev)
127 { 129 {
128 int pfd; 130 int pfd;
129 char *slave; 131 char *slave;
130 132
131 slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 133 slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0);
132 134
133 if (slave != NULL) 135 if (slave != NULL)
134 { 136 {
135 *ttydev = strdup (slave); 137 *ttydev = strdup (slave);
136 return pfd; 138 return pfd;
… …
152 const char *majors = "pqrstuvwxyzabcde"; 154 const char *majors = "pqrstuvwxyzabcde";
153 const char *minors = "0123456789abcdef"; 155 const char *minors = "0123456789abcdef";
154 156
155 for (i = 0; i < 256; i++) 157 for (i = 0; i < 256; i++)
156 { 158 {
157 snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); 159 snprintf (pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]);
158 snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); 160 snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]);
159 161
160 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 162 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
161 { 163 {
162 snprintf(pty_name, 32, "/dev/ptyp%d", i); 164 snprintf (pty_name, 32, "/dev/ptyp%d", i);
163 snprintf(tty_name, 32, "/dev/ttyp%d", i); 165 snprintf (tty_name, 32, "/dev/ttyp%d", i);
164 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) 166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1)
165 continue; 167 continue;
166 } 168 }
167 169
168 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
… …
197control_tty (int fd_tty) 199control_tty (int fd_tty)
198{ 200{
199 int fd; 201 int fd;
200 202
201 setsid (); 203 setsid ();
202
203#if defined(HAVE_DEV_PTMX) && defined(I_PUSH)
204 /*
205 * Push STREAMS modules:
206 * ptem: pseudo-terminal hardware emulation module.
207 * ldterm: standard terminal line discipline.
208 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
209 *
210 * After we push the STREAMS modules, the first open () on the slave side
211 * (i.e. the next section between the dashes giving us "tty opened OK")
212 * should make the "ptem" (or "ldterm" depending upon either which OS
213 * version or which set of manual pages you have) module give us a
214 * controlling terminal. We must already have close ()d the master side
215 * fd in this child process before we push STREAMS modules on because the
216 * documentation is really unclear about whether it is any close () on
217 * the master side or the last close () - i.e. a proper STREAMS dismantling
218 * close () - on the master side which causes a hang up to be sent
219 * through - Geoff Wing
220 */
221#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
222 if (isastream (fd_tty) == 1)
223# endif
224 {
225 ioctl (fd_tty, I_PUSH, "ptem");
226 ioctl (fd_tty, I_PUSH, "ldterm");
227 ioctl (fd_tty, I_PUSH, "ttcompat");
228 }
229#endif
230 204
231#ifdef TIOCSCTTY 205#ifdef TIOCSCTTY
232 ioctl (fd_tty, TIOCSCTTY, NULL); 206 ioctl (fd_tty, TIOCSCTTY, NULL);
233#else 207#else
234 fd = open (ttyname (fd_tty), O_RDWR); 208 fd = open (ttyname (fd_tty), O_RDWR);
… …
353{ 327{
354 /* get master (pty) */ 328 /* get master (pty) */
355 if ((pty = get_pty (&tty, &name)) < 0) 329 if ((pty = get_pty (&tty, &name)) < 0)
356 return false; 330 return false;
357 331
358 fcntl (pty, F_SETFL, O_NONBLOCK);
359
360 /* get slave (tty) */ 332 /* get slave (tty) */
361 if (tty < 0) 333 if (tty < 0)
362 { 334 {
363#ifndef NO_SETOWNER_TTYDEV 335#ifndef NO_SETOWNER_TTYDEV
364 chown (name, getuid (), ttyconf.gid); /* fail silently */ 336 chown (name, getuid (), ttyconf.gid); /* fail silently */
… …
373 put (); 345 put ();
374 return false; 346 return false;
375 } 347 }
376 } 348 }
377 349
350#if defined(I_PUSH)
351 /*
352 * Push STREAMS modules:
353 * ptem: pseudo-terminal hardware emulation module.
354 * ldterm: standard terminal line discipline.
355 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
356 *
357 * After we push the STREAMS modules, the first open () on the slave side
358 * should make the "ptem" (or "ldterm" depending upon either which OS
359 * version or which set of manual pages you have) module give us a
360 * controlling terminal. We must already have close ()d the master side
361 * fd in this child process before we push STREAMS modules on because the
362 * documentation is really unclear about whether it is any close () on
363 * the master side or the last close () - i.e. a proper STREAMS dismantling
364 * close () - on the master side which causes a hang up to be sent
365 * through - Geoff Wing
366 */
367#if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H)
368 if (isastream (tty) == 1)
369# endif
370 {
371 ioctl (tty, I_PUSH, "ptem");
372 ioctl (tty, I_PUSH, "ldterm");
373 ioctl (tty, I_PUSH, "ttcompat");
374 }
375#endif
376
377#if UTMP_SUPPORT
378# if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID)
379 int fd_stdin = dup (STDIN_FILENO);
380 dup2 (tty, STDIN_FILENO);
381
382 utmp_pos = ttyslot ();
383
384 dup2 (fd_stdin, STDIN_FILENO);
385 close (fd_stdin);
386# endif
387#endif
388
378 return true; 389 return true;
379} 390}
380 391

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