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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 1.4 by pcg, Tue Dec 2 21:49:46 2003 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 $ 4 * $Id: ptytty.C,v 1.4 2003/12/02 21:49:46 pcg Exp $
5 * 5 *
6 * All portions of code are copyright by their respective author/s. 6 * All portions of code are copyright by their respective author/s.
7 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 7 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.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
… …
48#endif 48#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
50# include <sys/stropts.h> /* for I_PUSH */ 50# include <sys/stropts.h> /* for I_PUSH */
51#endif 51#endif
52 52
53
54#ifdef DEBUG_TTY 53#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 54# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else 55#else
57# define D_TTY(x) 56# define D_TTY(x)
58#endif 57#endif
… …
67 */ 66 */
68/* EXTPROTO */ 67/* EXTPROTO */
69int 68int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 69rxvt_get_pty(int *fd_tty, const char **ttydev)
71{ 70{
72 int pfd; 71 int pfd;
73 72
74#ifdef PTYS_ARE_OPENPTY 73#ifdef PTYS_ARE_OPENPTY
74
75 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
76 76
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1)
78 {
78 *ttydev = strdup(tty_name); 79 *ttydev = strdup(tty_name);
79 return pfd; 80 return pfd;
80 } 81 }
81#endif 82#endif
82 83
83#ifdef PTYS_ARE__GETPTY 84#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 85 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 86 if (*ttydev != NULL)
86 return pfd; 87 return pfd;
87#endif 88#endif
88 89
89#ifdef PTYS_ARE_GETPTY 90#ifdef PTYS_ARE_GETPTY
91
90 char *ptydev; 92 char *ptydev;
91 93
92 while ((ptydev = getpty()) != NULL) 94 while ((ptydev = getpty()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 95 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
96 {
94 *ttydev = ptydev; 97 *ttydev = ptydev;
95 return pfd; 98 return pfd;
96 } 99 }
97#endif 100#endif
98 101
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 102#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 103# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
104
101 { 105 {
102# ifdef PTYS_ARE_GETPT 106# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 107 pfd = getpt();
104# else 108# else
109
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 110 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 111# endif
112
107 if (pfd >= 0) { 113 if (pfd >= 0)
114 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 115 if (grantpt(pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 116 && unlockpt(pfd) == 0)
117 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 118 *ttydev = ptsname(pfd); /* get slave's name */
111 return pfd; 119 return pfd;
112 } 120 }
113 close(pfd); 121 close(pfd);
114 }
115 } 122 }
123 }
116# endif 124# endif
117#endif 125#endif
118 126
119#ifdef PTYS_ARE_PTC 127#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 128 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 {
121 *ttydev = ttyname(pfd); 130 *ttydev = ttyname(pfd);
122 return pfd; 131 return pfd;
123 } 132 }
124#endif 133#endif
125 134
126#ifdef PTYS_ARE_CLONE 135#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 136 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
137 {
128 *ttydev = ptsname(pfd); 138 *ttydev = ptsname(pfd);
129 return pfd; 139 return pfd;
130 } 140 }
131#endif 141#endif
132 142
133#ifdef PTYS_ARE_NUMERIC 143#ifdef PTYS_ARE_NUMERIC
134 { 144 {
135 int idx; 145 int idx;
136 char *c1, *c2; 146 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 147 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 148 char tty_name[] = "/dev/ttyp???";
139 149
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 150 c1 = &(pty_name[sizeof(pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 151 c2 = &(tty_name[sizeof(tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 152 for (idx = 0; idx < 256; idx++)
153 {
143 sprintf(c1, "%d", idx); 154 sprintf(c1, "%d", idx);
144 sprintf(c2, "%d", idx); 155 sprintf(c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 156 if (access(tty_name, F_OK) < 0)
146 idx = 256; 157 {
147 break; 158 idx = 256;
148 } 159 break;
160 }
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 161 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
162 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 163 if (access(tty_name, R_OK | W_OK) == 0)
164 {
151 *ttydev = strdup(tty_name); 165 *ttydev = strdup(tty_name);
152 return pfd; 166 return pfd;
153 } 167 }
154 close(pfd); 168 close(pfd);
155 } 169 }
156 }
157 } 170 }
171 }
158#endif 172#endif
159#ifdef PTYS_ARE_SEARCHED 173#ifdef PTYS_ARE_SEARCHED
160 { 174 {
161 const char *c1, *c2; 175 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 176 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 177 char tty_name[] = "/dev/tty??";
164 178
165# ifndef PTYCHAR1 179# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 180# define PTYCHAR1 "pqrstuvwxyz"
167# endif 181# endif
168# ifndef PTYCHAR2 182# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 183# define PTYCHAR2 "0123456789abcdef"
170# endif 184# endif
185
171 for (c1 = PTYCHAR1; *c1; c1++) { 186 for (c1 = PTYCHAR1; *c1; c1++)
187 {
172 pty_name[(sizeof(pty_name) - 3)] = 188 pty_name[(sizeof(pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 189 tty_name[(sizeof(pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 190 for (c2 = PTYCHAR2; *c2; c2++)
191 {
175 pty_name[(sizeof(pty_name) - 2)] = 192 pty_name[(sizeof(pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 193 tty_name[(sizeof(pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 194 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 196 if (access(tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 197 {
180 return pfd; 198 *ttydev = strdup(tty_name);
181 } 199 return pfd;
182 close(pfd); 200 }
183 } 201 close(pfd);
184 } 202 }
185 } 203 }
186 } 204 }
205 }
187#endif 206#endif
188 return -1; 207 return -1;
189} 208}
190 209
191/*----------------------------------------------------------------------*/ 210/*----------------------------------------------------------------------*/
192/* 211/*
193 * Returns tty file descriptor, or -1 on failure 212 * Returns tty file descriptor, or -1 on failure
194 */ 213 */
195/* EXTPROTO */ 214/* EXTPROTO */
196int 215int
197rxvt_get_tty(const char *ttydev) 216rxvt_get_tty (const char *ttydev)
198{ 217{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 218 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 219}
201 220
202/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
203/* 222/*
204 * Make our tty a controlling tty so that /dev/tty points to us 223 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 224 */
206/* EXTPROTO */ 225/* EXTPROTO */
207int 226int
208rxvt_control_tty(int fd_tty, const char *ttydev) 227rxvt_control_tty (int fd_tty, const char *ttydev)
209{ 228{
210#ifndef __QNX__ 229#ifndef __QNX__
211 int fd; 230 int fd;
212 231
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev)); 232 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 233 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 234# ifdef HAVE_SETSID
216 setsid(); 235 setsid ();
217# endif 236# endif
218# if defined(HAVE_SETPGID) 237# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 238 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 239# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 240 setpgrp (0, 0);
222# endif 241# endif
223/* ---------------------------------------- */ 242 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 243# ifdef TIOCNOTTY
244
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 246 D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) { 247 if (fd >= 0)
248 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 249 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 250 close (fd);
230 } 251 }
231# endif 252# endif
232/* ---------------------------------------- */ 253 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 254 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)")); 255 D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0) 256 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 257 close (fd); /* ouch: still have controlling tty */
237/* ---------------------------------------- */ 258 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 260 /*
240 * Push STREAMS modules: 261 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 262 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 263 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 265 *
245 * 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
246 * (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")
247 * should make the "ptem" (or "ldterm" depending upon either which OS 268 * 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 269 * 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 270 * 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 271 * 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 272 * 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 273 * 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 274 * close() - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 275 * through - Geoff Wing
255 */ 276 */
256# ifdef HAVE_ISASTREAM 277# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 278 if (isastream (fd_tty) == 1)
258# endif 279# endif
259 { 280 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 281 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem"); 282 ioctl (fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm"); 283 ioctl (fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat"); 284 ioctl (fd_tty, I_PUSH, "ttcompat");
264 } 285 }
265#endif 286#endif
266/* ---------------------------------------- */ 287 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 288# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 289 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 290 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 291# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); 293 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
273# else 294# else
274 fd = open(ttydev, O_RDWR); 295 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); 296 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 297 if (fd >= 0)
277 close(fd);
278# endif
279/* ---------------------------------------- */
280 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)"));
282 if (fd < 0)
283 return -1; /* fatal */
284 close(fd); 298 close(fd);
299# endif
285/* ---------------------------------------- */ 300 /* ---------------------------------------- */
301 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)
304 return -1; /* fatal */
305 close (fd);
306 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 307 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
287/* ---------------------------------------- */ 308 /* ---------------------------------------- */
288#endif /* ! __QNX__ */ 309#endif /* ! __QNX__ */
310
289 return 0; 311 return 0;
290} 312}
291/*----------------------- end-of-file (C source) -----------------------*/ 313/*----------------------- end-of-file (C source) -----------------------*/

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