ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/rxvt-unicode/src/ptytty.C
(Generate patch)

Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.1 by pcg, Mon Nov 24 17:28:08 2003 UTC vs.
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.c
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.1 2003/11/24 17:28:08 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>
8 * 7 *
9 * This program is free software; you can redistribute it and/or modify 8 * This program is free software; you can redistribute it and/or modify
… …
25 24
26/* 25/*
27 * Try to be self-contained except for the above autoconfig'd defines 26 * Try to be self-contained except for the above autoconfig'd defines
28 */ 27 */
29 28
29#if 0
30#ifdef HAVE_GETPT
31# define _GNU_SOURCE
32#endif
33#endif
34
30#include <stdio.h> 35#include <cstdio>
31#ifdef HAVE_STDLIB_H 36#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 37# include <cstdlib>
33#endif 38#endif
34#ifdef HAVE_SYS_TYPES_H 39#ifdef HAVE_SYS_TYPES_H
35# include <sys/types.h> 40# include <sys/types.h>
36#endif 41#endif
37#ifdef HAVE_UNISTD_H 42#ifdef HAVE_UNISTD_H
38# include <unistd.h> 43# include <unistd.h>
39#endif 44#endif
40#if defined(HAVE_STRING_H) 45#if defined(HAVE_STRING_H)
41# include <string.h> 46# include <cstring>
42#endif 47#endif
43#ifdef HAVE_FCNTL_H 48#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 49# include <fcntl.h>
45#endif 50#endif
46#ifdef HAVE_SYS_IOCTL_H 51#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 52# include <sys/ioctl.h>
48#endif 53#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
50# include <sys/stropts.h> /* for I_PUSH */ 55# include <sys/stropts.h> /* for I_PUSH */
51#endif 56#endif
52 57#ifdef HAVE_ISASTREAM
58# include <stropts.h>
59#endif
53 60
54#ifdef DEBUG_TTY 61#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else 63#else
57# define D_TTY(x) 64# define D_TTY(x)
… …
65 * If successful, ttydev is set to the name of the slave device. 72 * 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 73 * fd_tty _may_ also be set to an open fd to the slave device
67 */ 74 */
68/* EXTPROTO */ 75/* EXTPROTO */
69int 76int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 77rxvt_get_pty (int *fd_tty, const char **ttydev)
71{ 78{
72 int pfd; 79 int pfd;
73 80
74#ifdef PTYS_ARE_OPENPTY 81#ifdef PTYS_ARE_OPENPTY
82
75 char tty_name[sizeof "/dev/pts/????\0"]; 83 char tty_name[sizeof "/dev/pts/????\0"];
76 84
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
86 {
78 *ttydev = strdup(tty_name); 87 *ttydev = strdup (tty_name);
79 return pfd; 88 return pfd;
80 } 89 }
81#endif 90#endif
82 91
83#ifdef PTYS_ARE__GETPTY 92#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NDELAY | O_NOCTTY, 0622, 0); 93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 94 if (*ttydev != NULL)
86 return pfd; 95 return pfd;
87#endif 96#endif
88 97
89#ifdef PTYS_ARE_GETPTY 98#ifdef PTYS_ARE_GETPTY
99
90 char *ptydev; 100 char *ptydev;
91 101
92 while ((ptydev = getpty()) != NULL) 102 while ((ptydev = getpty ()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
94 *ttydev = ptydev; 105 *ttydev = ptydev;
95 return pfd; 106 return pfd;
96 } 107 }
97#endif 108#endif
98 109
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
112
101 { 113 {
102# ifdef PTYS_ARE_GETPT 114# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 115 pfd = getpt ();
104# else 116# else
117
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 119# endif
120
107 if (pfd >= 0) { 121 if (pfd >= 0)
122 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 123 if (grantpt (pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 124 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 126 *ttydev = ptsname (pfd); /* get slave's name */
111 return pfd; 127 return pfd;
112 } 128 }
113 close(pfd); 129 close (pfd);
114 }
115 } 130 }
131 }
116# endif 132# endif
117#endif 133#endif
118 134
119#ifdef PTYS_ARE_PTC 135#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 {
121 *ttydev = ttyname(pfd); 138 *ttydev = ttyname (pfd);
122 return pfd; 139 return pfd;
123 } 140 }
124#endif 141#endif
125 142
126#ifdef PTYS_ARE_CLONE 143#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 {
128 *ttydev = ptsname(pfd); 146 *ttydev = ptsname (pfd);
129 return pfd; 147 return pfd;
130 } 148 }
131#endif 149#endif
132 150
133#ifdef PTYS_ARE_NUMERIC 151#ifdef PTYS_ARE_NUMERIC
134 { 152 {
135 int idx; 153 int idx;
136 char *c1, *c2; 154 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 155 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 156 char tty_name[] = "/dev/ttyp???";
139 157
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 158 c1 = & (pty_name[sizeof (pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 159 c2 = & (tty_name[sizeof (tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 160 for (idx = 0; idx < 256; idx++)
161 {
143 sprintf(c1, "%d", idx); 162 sprintf (c1, "%d", idx);
144 sprintf(c2, "%d", idx); 163 sprintf (c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 164 if (access (tty_name, F_OK) < 0)
146 idx = 256; 165 {
147 break; 166 idx = 256;
148 } 167 break;
168 }
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 171 if (access (tty_name, R_OK | W_OK) == 0)
172 {
151 *ttydev = strdup(tty_name); 173 *ttydev = strdup (tty_name);
152 return pfd; 174 return pfd;
153 } 175 }
154 close(pfd); 176 close (pfd);
155 } 177 }
156 }
157 } 178 }
179 }
158#endif 180#endif
159#ifdef PTYS_ARE_SEARCHED 181#ifdef PTYS_ARE_SEARCHED
160 { 182 {
161 const char *c1, *c2; 183 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 184 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 185 char tty_name[] = "/dev/tty??";
164 186
165# ifndef PTYCHAR1 187# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 188# define PTYCHAR1 "pqrstuvwxyz"
167# endif 189# endif
168# ifndef PTYCHAR2 190# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 191# define PTYCHAR2 "0123456789abcdef"
170# endif 192# endif
193
171 for (c1 = PTYCHAR1; *c1; c1++) { 194 for (c1 = PTYCHAR1; *c1; c1++)
195 {
172 pty_name[(sizeof(pty_name) - 3)] = 196 pty_name[ (sizeof (pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 197 tty_name[ (sizeof (pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 198 for (c2 = PTYCHAR2; *c2; c2++)
199 {
175 pty_name[(sizeof(pty_name) - 2)] = 200 pty_name[ (sizeof (pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 201 tty_name[ (sizeof (pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 202 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
203 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 204 if (access (tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 205 {
180 return pfd; 206 *ttydev = strdup (tty_name);
181 } 207 return pfd;
182 close(pfd); 208 }
183 } 209 close (pfd);
184 } 210 }
185 } 211 }
186 } 212 }
213 }
187#endif 214#endif
188 return -1; 215 return -1;
189} 216}
190 217
191/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
192/* 219/*
193 * Returns tty file descriptor, or -1 on failure 220 * Returns tty file descriptor, or -1 on failure
194 */ 221 */
195/* EXTPROTO */ 222/* EXTPROTO */
196int 223int
197rxvt_get_tty(const char *ttydev) 224rxvt_get_tty (const char *ttydev)
198{ 225{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 226 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 227}
201 228
202/*----------------------------------------------------------------------*/ 229/*----------------------------------------------------------------------*/
203/* 230/*
204 * Make our tty a controlling tty so that /dev/tty points to us 231 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 232 */
206/* EXTPROTO */ 233/* EXTPROTO */
207int 234int
208rxvt_control_tty(int fd_tty, const char *ttydev) 235rxvt_control_tty (int fd_tty, const char *ttydev)
209{ 236{
210#ifndef __QNX__ 237#ifndef __QNX__
211 int fd; 238 int fd;
212 239
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev)); 240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
214/* ---------------------------------------- */ 241 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 242# ifdef HAVE_SETSID
216 setsid(); 243 setsid ();
217# endif 244# endif
218# if defined(HAVE_SETPGID) 245# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 246 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 247# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 248 setpgrp (0, 0);
222# endif 249# endif
223/* ---------------------------------------- */ 250 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 251# ifdef TIOCNOTTY
252
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 254 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) { 255 if (fd >= 0)
256 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 258 close (fd);
230 } 259 }
231# endif 260# endif
232/* ---------------------------------------- */ 261 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 262 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)")); 263 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0) 264 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 265 close (fd); /* ouch: still have controlling tty */
237/* ---------------------------------------- */ 266 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 268 /*
240 * Push STREAMS modules: 269 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 270 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 271 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 272 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 273 *
245 * After we push the STREAMS modules, the first open() on the slave side 274 * 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") 275 * (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 276 * 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 277 * 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 278 * 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 279 * 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 280 * 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 281 * 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 282 * close () - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 283 * through - Geoff Wing
255 */ 284 */
256# ifdef HAVE_ISASTREAM 285# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 286 if (isastream (fd_tty) == 1)
258# endif 287# endif
259 { 288 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem"); 290 ioctl (fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm"); 291 ioctl (fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat"); 292 ioctl (fd_tty, I_PUSH, "ttcompat");
264 } 293 }
265#endif 294#endif
266/* ---------------------------------------- */ 295 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 296# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 297 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 299# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); 301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
273# else 302# else
274 fd = open(ttydev, O_RDWR); 303 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); 304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 305 if (fd >= 0)
277 close(fd); 306 close (fd);
278# endif 307# endif
279/* ---------------------------------------- */ 308 /* ---------------------------------------- */
280 fd = open("/dev/tty", O_WRONLY); 309 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)")); 310 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
282 if (fd < 0) 311 if (fd < 0)
283 return -1; /* fatal */ 312 return -1; /* fatal */
284 close(fd); 313 close (fd);
285/* ---------------------------------------- */ 314 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
287/* ---------------------------------------- */ 316 /* ---------------------------------------- */
288#endif /* ! __QNX__ */ 317#endif /* ! __QNX__ */
318
289 return 0; 319 return 0;
290} 320}
291/*----------------------- end-of-file (C source) -----------------------*/ 321/*----------------------- end-of-file (C source) -----------------------*/

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines