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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.3 by pcg, Tue Nov 25 15:25:17 2003 UTC vs.
Revision 1.11 by pcg, Thu Apr 8 20:31:45 2004 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.3 2003/11/25 15:25:17 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.
… …
25 25
26/* 26/*
27 * Try to be self-contained except for the above autoconfig'd defines 27 * Try to be self-contained except for the above autoconfig'd defines
28 */ 28 */
29 29
30#if 0
31#ifdef HAVE_GETPT
32# define _GNU_SOURCE
33#endif
34#endif
35
30#include <stdio.h> 36#include <cstdio>
31#ifdef HAVE_STDLIB_H 37#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 38# include <cstdlib>
33#endif 39#endif
34#ifdef HAVE_SYS_TYPES_H 40#ifdef HAVE_SYS_TYPES_H
35# include <sys/types.h> 41# include <sys/types.h>
36#endif 42#endif
37#ifdef HAVE_UNISTD_H 43#ifdef HAVE_UNISTD_H
38# include <unistd.h> 44# include <unistd.h>
39#endif 45#endif
40#if defined(HAVE_STRING_H) 46#if defined(HAVE_STRING_H)
41# include <string.h> 47# include <cstring>
42#endif 48#endif
43#ifdef HAVE_FCNTL_H 49#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 50# include <fcntl.h>
45#endif 51#endif
46#ifdef HAVE_SYS_IOCTL_H 52#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 53# include <sys/ioctl.h>
48#endif 54#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 55#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
50# include <sys/stropts.h> /* for I_PUSH */ 56# include <sys/stropts.h> /* for I_PUSH */
51#endif 57#endif
52 58#ifdef HAVE_ISASTREAM
59# include <stropts.h>
60#endif
53 61
54#ifdef DEBUG_TTY 62#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 63# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else 64#else
57# define D_TTY(x) 65# define D_TTY(x)
… …
65 * If successful, ttydev is set to the name of the slave device. 73 * If successful, ttydev is set to the name of the slave device.
66 * fd_tty _may_ also be set to an open fd to the slave device 74 * fd_tty _may_ also be set to an open fd to the slave device
67 */ 75 */
68/* EXTPROTO */ 76/* EXTPROTO */
69int 77int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 78rxvt_get_pty (int *fd_tty, const char **ttydev)
71{ 79{
72 int pfd; 80 int pfd;
73 81
74#ifdef PTYS_ARE_OPENPTY 82#ifdef PTYS_ARE_OPENPTY
83
75 char tty_name[sizeof "/dev/pts/????\0"]; 84 char tty_name[sizeof "/dev/pts/????\0"];
76 85
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 86 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
87 {
78 *ttydev = strdup(tty_name); 88 *ttydev = strdup (tty_name);
79 return pfd; 89 return pfd;
80 } 90 }
81#endif 91#endif
82 92
83#ifdef PTYS_ARE__GETPTY 93#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 94 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 95 if (*ttydev != NULL)
86 return pfd; 96 return pfd;
87#endif 97#endif
88 98
89#ifdef PTYS_ARE_GETPTY 99#ifdef PTYS_ARE_GETPTY
100
90 char *ptydev; 101 char *ptydev;
91 102
92 while ((ptydev = getpty()) != NULL) 103 while ((ptydev = getpty ()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 104 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
105 {
94 *ttydev = ptydev; 106 *ttydev = ptydev;
95 return pfd; 107 return pfd;
96 } 108 }
97#endif 109#endif
98 110
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 111#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 112# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
113
101 { 114 {
102# ifdef PTYS_ARE_GETPT 115# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 116 pfd = getpt ();
104# else 117# else
118
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 119 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 120# endif
121
107 if (pfd >= 0) { 122 if (pfd >= 0)
123 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 124 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 125 && unlockpt (pfd) == 0)
126 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 127 *ttydev = ptsname (pfd); /* get slave's name */
111 return pfd; 128 return pfd;
112 } 129 }
113 close(pfd); 130 close (pfd);
114 }
115 } 131 }
132 }
116# endif 133# endif
117#endif 134#endif
118 135
119#ifdef PTYS_ARE_PTC 136#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
138 {
121 *ttydev = ttyname(pfd); 139 *ttydev = ttyname (pfd);
122 return pfd; 140 return pfd;
123 } 141 }
124#endif 142#endif
125 143
126#ifdef PTYS_ARE_CLONE 144#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 145 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
146 {
128 *ttydev = ptsname(pfd); 147 *ttydev = ptsname (pfd);
129 return pfd; 148 return pfd;
130 } 149 }
131#endif 150#endif
132 151
133#ifdef PTYS_ARE_NUMERIC 152#ifdef PTYS_ARE_NUMERIC
134 { 153 {
135 int idx; 154 int idx;
136 char *c1, *c2; 155 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 156 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 157 char tty_name[] = "/dev/ttyp???";
139 158
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 159 c1 = & (pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 160 c2 = & (tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 161 for (idx = 0; idx < 256; idx++)
162 {
143 sprintf(c1, "%d", idx); 163 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 164 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 165 if (access (tty_name, F_OK) < 0)
146 idx = 256; 166 {
147 break; 167 idx = 256;
148 } 168 break;
169 }
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
171 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 172 if (access (tty_name, R_OK | W_OK) == 0)
173 {
151 *ttydev = strdup(tty_name); 174 *ttydev = strdup (tty_name);
152 return pfd; 175 return pfd;
153 } 176 }
154 close(pfd); 177 close (pfd);
155 } 178 }
156 }
157 } 179 }
180 }
158#endif 181#endif
159#ifdef PTYS_ARE_SEARCHED 182#ifdef PTYS_ARE_SEARCHED
160 { 183 {
161 const char *c1, *c2; 184 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 185 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 186 char tty_name[] = "/dev/tty??";
164 187
165# ifndef PTYCHAR1 188# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 189# define PTYCHAR1 "pqrstuvwxyz"
167# endif 190# endif
168# ifndef PTYCHAR2 191# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 192# define PTYCHAR2 "0123456789abcdef"
170# endif 193# endif
194
171 for (c1 = PTYCHAR1; *c1; c1++) { 195 for (c1 = PTYCHAR1; *c1; c1++)
196 {
172 pty_name[(sizeof(pty_name) - 3)] = 197 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 198 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 199 for (c2 = PTYCHAR2; *c2; c2++)
200 {
175 pty_name[(sizeof(pty_name) - 2)] = 201 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 202 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 203 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
204 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 205 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 206 {
180 return pfd; 207 *ttydev = strdup (tty_name);
181 } 208 return pfd;
182 close(pfd); 209 }
183 } 210 close (pfd);
184 } 211 }
185 } 212 }
186 } 213 }
214 }
187#endif 215#endif
188 return -1; 216 return -1;
189} 217}
190 218
191/*----------------------------------------------------------------------*/ 219/*----------------------------------------------------------------------*/
192/* 220/*
193 * Returns tty file descriptor, or -1 on failure 221 * Returns tty file descriptor, or -1 on failure
194 */ 222 */
195/* EXTPROTO */ 223/* EXTPROTO */
196int 224int
197rxvt_get_tty(const char *ttydev) 225rxvt_get_tty (const char *ttydev)
198{ 226{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 227 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 228}
201 229
202/*----------------------------------------------------------------------*/ 230/*----------------------------------------------------------------------*/
203/* 231/*
204 * Make our tty a controlling tty so that /dev/tty points to us 232 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 233 */
206/* EXTPROTO */ 234/* EXTPROTO */
207int 235int
208rxvt_control_tty(int fd_tty, const char *ttydev) 236rxvt_control_tty (int fd_tty, const char *ttydev)
209{ 237{
210#ifndef __QNX__ 238#ifndef __QNX__
211 int fd; 239 int fd;
212 240
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev)); 241 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
214/* ---------------------------------------- */ 242 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 243# ifdef HAVE_SETSID
216 setsid(); 244 setsid ();
217# endif 245# endif
218# if defined(HAVE_SETPGID) 246# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 247 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 248# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 249 setpgrp (0, 0);
222# endif 250# endif
223/* ---------------------------------------- */ 251 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 252# ifdef TIOCNOTTY
253
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 255 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) { 256 if (fd >= 0)
257 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 258 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 259 close (fd);
230 } 260 }
231# endif 261# endif
232/* ---------------------------------------- */ 262 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 263 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
234 D_TTY((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); 264 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0) 265 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 266 close (fd); /* ouch: still have controlling tty */
237/* ---------------------------------------- */ 267 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 268#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 269 /*
240 * Push STREAMS modules: 270 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 271 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 272 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 273 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 274 *
245 * After we push the STREAMS modules, the first open() on the slave side 275 * After we push the STREAMS modules, the first open () on the slave side
246 * (i.e. the next section between the dashes giving us "tty opened OK") 276 * (i.e. the next section between the dashes giving us "tty opened OK")
247 * should make the "ptem" (or "ldterm" depending upon either which OS 277 * should make the "ptem" (or "ldterm" depending upon either which OS
248 * version or which set of manual pages you have) module give us a 278 * version or which set of manual pages you have) module give us a
249 * controlling terminal. We must already have close()d the master side 279 * controlling terminal. We must already have close ()d the master side
250 * fd in this child process before we push STREAMS modules on because the 280 * fd in this child process before we push STREAMS modules on because the
251 * documentation is really unclear about whether it is any close() on 281 * documentation is really unclear about whether it is any close () on
252 * the master side or the last close() - i.e. a proper STREAMS dismantling 282 * the master side or the last close () - i.e. a proper STREAMS dismantling
253 * close() - on the master side which causes a hang up to be sent 283 * close () - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 284 * through - Geoff Wing
255 */ 285 */
256# ifdef HAVE_ISASTREAM 286# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 287 if (isastream (fd_tty) == 1)
258# endif 288# endif
259 { 289 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 290 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem"); 291 ioctl (fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm"); 292 ioctl (fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat"); 293 ioctl (fd_tty, I_PUSH, "ttcompat");
264 } 294 }
265#endif 295#endif
266/* ---------------------------------------- */ 296 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 297# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 298 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 299 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 300# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 301 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); 302 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
273# else 303# else
274 fd = open(ttydev, O_RDWR); 304 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); 305 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 306 if (fd >= 0)
277 close(fd); 307 close (fd);
278# endif 308# endif
279/* ---------------------------------------- */ 309 /* ---------------------------------------- */
280 fd = open("/dev/tty", O_WRONLY); 310 fd = open ("/dev/tty", O_WRONLY);
281 D_TTY((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); 311 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
282 if (fd < 0) 312 if (fd < 0)
283 return -1; /* fatal */ 313 return -1; /* fatal */
284 close(fd); 314 close (fd);
285/* ---------------------------------------- */ 315 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 316 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
287/* ---------------------------------------- */ 317 /* ---------------------------------------- */
288#endif /* ! __QNX__ */ 318#endif /* ! __QNX__ */
319
289 return 0; 320 return 0;
290} 321}
291/*----------------------- end-of-file (C source) -----------------------*/ 322/*----------------------- end-of-file (C source) -----------------------*/

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