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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.2 by pcg, Mon Nov 24 17:31:27 2003 UTC vs.
Revision 1.5 by pcg, Sat Jan 31 03:27:45 2004 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.c
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.2 2003/11/24 17:31:27 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
… …
48#endif 47#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 48#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__)
50# include <sys/stropts.h> /* for I_PUSH */ 49# include <sys/stropts.h> /* for I_PUSH */
51#endif 50#endif
52 51
53
54#ifdef DEBUG_TTY 52#ifdef DEBUG_TTY
55# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 53# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
56#else 54#else
57# define D_TTY(x) 55# define D_TTY(x)
58#endif 56#endif
… …
67 */ 65 */
68/* EXTPROTO */ 66/* EXTPROTO */
69int 67int
70rxvt_get_pty(int *fd_tty, const char **ttydev) 68rxvt_get_pty(int *fd_tty, const char **ttydev)
71{ 69{
72 int pfd; 70 int pfd;
73 71
74#ifdef PTYS_ARE_OPENPTY 72#ifdef PTYS_ARE_OPENPTY
73
75 char tty_name[sizeof "/dev/pts/????\0"]; 74 char tty_name[sizeof "/dev/pts/????\0"];
76 75
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) { 76 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1)
77 {
78 *ttydev = strdup(tty_name); 78 *ttydev = strdup(tty_name);
79 return pfd; 79 return pfd;
80 } 80 }
81#endif 81#endif
82 82
83#ifdef PTYS_ARE__GETPTY 83#ifdef PTYS_ARE__GETPTY
84 *ttydev = _getpty(&pfd, O_RDWR | O_NDELAY | O_NOCTTY, 0622, 0); 84 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
85 if (*ttydev != NULL) 85 if (*ttydev != NULL)
86 return pfd; 86 return pfd;
87#endif 87#endif
88 88
89#ifdef PTYS_ARE_GETPTY 89#ifdef PTYS_ARE_GETPTY
90
90 char *ptydev; 91 char *ptydev;
91 92
92 while ((ptydev = getpty()) != NULL) 93 while ((ptydev = getpty()) != NULL)
93 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) { 94 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
95 {
94 *ttydev = ptydev; 96 *ttydev = ptydev;
95 return pfd; 97 return pfd;
96 } 98 }
97#endif 99#endif
98 100
99#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 101#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
100# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 102# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
103
101 { 104 {
102# ifdef PTYS_ARE_GETPT 105# ifdef PTYS_ARE_GETPT
103 pfd = getpt(); 106 pfd = getpt();
104# else 107# else
108
105 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 109 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
106# endif 110# endif
111
107 if (pfd >= 0) { 112 if (pfd >= 0)
113 {
108 if (grantpt(pfd) == 0 /* change slave permissions */ 114 if (grantpt(pfd) == 0 /* change slave permissions */
109 && unlockpt(pfd) == 0) { /* slave now unlocked */ 115 && unlockpt(pfd) == 0)
116 { /* slave now unlocked */
110 *ttydev = ptsname(pfd); /* get slave's name */ 117 *ttydev = ptsname(pfd); /* get slave's name */
111 return pfd; 118 return pfd;
112 } 119 }
113 close(pfd); 120 close(pfd);
114 }
115 } 121 }
122 }
116# endif 123# endif
117#endif 124#endif
118 125
119#ifdef PTYS_ARE_PTC 126#ifdef PTYS_ARE_PTC
120 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) { 127 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
128 {
121 *ttydev = ttyname(pfd); 129 *ttydev = ttyname(pfd);
122 return pfd; 130 return pfd;
123 } 131 }
124#endif 132#endif
125 133
126#ifdef PTYS_ARE_CLONE 134#ifdef PTYS_ARE_CLONE
127 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) { 135 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
136 {
128 *ttydev = ptsname(pfd); 137 *ttydev = ptsname(pfd);
129 return pfd; 138 return pfd;
130 } 139 }
131#endif 140#endif
132 141
133#ifdef PTYS_ARE_NUMERIC 142#ifdef PTYS_ARE_NUMERIC
134 { 143 {
135 int idx; 144 int idx;
136 char *c1, *c2; 145 char *c1, *c2;
137 char pty_name[] = "/dev/ptyp???"; 146 char pty_name[] = "/dev/ptyp???";
138 char tty_name[] = "/dev/ttyp???"; 147 char tty_name[] = "/dev/ttyp???";
139 148
140 c1 = &(pty_name[sizeof(pty_name) - 4]); 149 c1 = &(pty_name[sizeof(pty_name) - 4]);
141 c2 = &(tty_name[sizeof(tty_name) - 4]); 150 c2 = &(tty_name[sizeof(tty_name) - 4]);
142 for (idx = 0; idx < 256; idx++) { 151 for (idx = 0; idx < 256; idx++)
152 {
143 sprintf(c1, "%d", idx); 153 sprintf(c1, "%d", idx);
144 sprintf(c2, "%d", idx); 154 sprintf(c2, "%d", idx);
145 if (access(tty_name, F_OK) < 0) { 155 if (access(tty_name, F_OK) < 0)
146 idx = 256; 156 {
147 break; 157 idx = 256;
148 } 158 break;
159 }
149 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 160 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
161 {
150 if (access(tty_name, R_OK | W_OK) == 0) { 162 if (access(tty_name, R_OK | W_OK) == 0)
163 {
151 *ttydev = strdup(tty_name); 164 *ttydev = strdup(tty_name);
152 return pfd; 165 return pfd;
153 } 166 }
154 close(pfd); 167 close(pfd);
155 } 168 }
156 }
157 } 169 }
170 }
158#endif 171#endif
159#ifdef PTYS_ARE_SEARCHED 172#ifdef PTYS_ARE_SEARCHED
160 { 173 {
161 const char *c1, *c2; 174 const char *c1, *c2;
162 char pty_name[] = "/dev/pty??"; 175 char pty_name[] = "/dev/pty??";
163 char tty_name[] = "/dev/tty??"; 176 char tty_name[] = "/dev/tty??";
164 177
165# ifndef PTYCHAR1 178# ifndef PTYCHAR1
166# define PTYCHAR1 "pqrstuvwxyz" 179# define PTYCHAR1 "pqrstuvwxyz"
167# endif 180# endif
168# ifndef PTYCHAR2 181# ifndef PTYCHAR2
169# define PTYCHAR2 "0123456789abcdef" 182# define PTYCHAR2 "0123456789abcdef"
170# endif 183# endif
184
171 for (c1 = PTYCHAR1; *c1; c1++) { 185 for (c1 = PTYCHAR1; *c1; c1++)
186 {
172 pty_name[(sizeof(pty_name) - 3)] = 187 pty_name[(sizeof(pty_name) - 3)] =
173 tty_name[(sizeof(pty_name) - 3)] = *c1; 188 tty_name[(sizeof(pty_name) - 3)] = *c1;
174 for (c2 = PTYCHAR2; *c2; c2++) { 189 for (c2 = PTYCHAR2; *c2; c2++)
190 {
175 pty_name[(sizeof(pty_name) - 2)] = 191 pty_name[(sizeof(pty_name) - 2)] =
176 tty_name[(sizeof(pty_name) - 2)] = *c2; 192 tty_name[(sizeof(pty_name) - 2)] = *c2;
177 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) { 193 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
194 {
178 if (access(tty_name, R_OK | W_OK) == 0) { 195 if (access(tty_name, R_OK | W_OK) == 0)
179 *ttydev = strdup(tty_name); 196 {
180 return pfd; 197 *ttydev = strdup(tty_name);
181 } 198 return pfd;
182 close(pfd); 199 }
183 } 200 close(pfd);
184 } 201 }
185 } 202 }
186 } 203 }
204 }
187#endif 205#endif
188 return -1; 206 return -1;
189} 207}
190 208
191/*----------------------------------------------------------------------*/ 209/*----------------------------------------------------------------------*/
192/* 210/*
193 * Returns tty file descriptor, or -1 on failure 211 * Returns tty file descriptor, or -1 on failure
194 */ 212 */
195/* EXTPROTO */ 213/* EXTPROTO */
196int 214int
197rxvt_get_tty(const char *ttydev) 215rxvt_get_tty (const char *ttydev)
198{ 216{
199 return open(ttydev, O_RDWR | O_NOCTTY, 0); 217 return open (ttydev, O_RDWR | O_NOCTTY, 0);
200} 218}
201 219
202/*----------------------------------------------------------------------*/ 220/*----------------------------------------------------------------------*/
203/* 221/*
204 * Make our tty a controlling tty so that /dev/tty points to us 222 * Make our tty a controlling tty so that /dev/tty points to us
205 */ 223 */
206/* EXTPROTO */ 224/* EXTPROTO */
207int 225int
208rxvt_control_tty(int fd_tty, const char *ttydev) 226rxvt_control_tty (int fd_tty, const char *ttydev)
209{ 227{
210#ifndef __QNX__ 228#ifndef __QNX__
211 int fd; 229 int fd;
212 230
213 D_TTY((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev)); 231 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
214/* ---------------------------------------- */ 232 /* ---------------------------------------- */
215# ifdef HAVE_SETSID 233# ifdef HAVE_SETSID
216 setsid(); 234 setsid ();
217# endif 235# endif
218# if defined(HAVE_SETPGID) 236# if defined(HAVE_SETPGID)
219 setpgid(0, 0); 237 setpgid (0, 0);
220# elif defined(HAVE_SETPGRP) 238# elif defined(HAVE_SETPGRP)
221 setpgrp(0, 0); 239 setpgrp (0, 0);
222# endif 240# endif
223/* ---------------------------------------- */ 241 /* ---------------------------------------- */
224# ifdef TIOCNOTTY 242# ifdef TIOCNOTTY
243
225 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 244 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
226 D_TTY((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); 245 D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
227 if (fd >= 0) { 246 if (fd >= 0)
247 {
228 ioctl(fd, TIOCNOTTY, NULL); /* void tty associations */ 248 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
229 close(fd); 249 close (fd);
230 } 250 }
231# endif 251# endif
232/* ---------------------------------------- */ 252 /* ---------------------------------------- */
233 fd = open("/dev/tty", O_RDWR | O_NOCTTY); 253 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)")); 254 D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
235 if (fd >= 0) 255 if (fd >= 0)
236 close(fd); /* ouch: still have controlling tty */ 256 close (fd); /* ouch: still have controlling tty */
237/* ---------------------------------------- */ 257 /* ---------------------------------------- */
238#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 258#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
239/* 259 /*
240 * Push STREAMS modules: 260 * Push STREAMS modules:
241 * ptem: pseudo-terminal hardware emulation module. 261 * ptem: pseudo-terminal hardware emulation module.
242 * ldterm: standard terminal line discipline. 262 * ldterm: standard terminal line discipline.
243 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 263 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
244 * 264 *
245 * After we push the STREAMS modules, the first open() on the slave side 265 * 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") 266 * (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 267 * 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 268 * 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 269 * 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 270 * 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 271 * 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 272 * 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 273 * close() - on the master side which causes a hang up to be sent
254 * through - Geoff Wing 274 * through - Geoff Wing
255 */ 275 */
256# ifdef HAVE_ISASTREAM 276# ifdef HAVE_ISASTREAM
257 if (isastream(fd_tty) == 1) 277 if (isastream (fd_tty) == 1)
258# endif 278# endif
259 { 279 {
260 D_TTY((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); 280 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
261 ioctl(fd_tty, I_PUSH, "ptem"); 281 ioctl (fd_tty, I_PUSH, "ptem");
262 ioctl(fd_tty, I_PUSH, "ldterm"); 282 ioctl (fd_tty, I_PUSH, "ldterm");
263 ioctl(fd_tty, I_PUSH, "ttcompat"); 283 ioctl (fd_tty, I_PUSH, "ttcompat");
264 } 284 }
265#endif 285#endif
266/* ---------------------------------------- */ 286 /* ---------------------------------------- */
267# if defined(TIOCSCTTY) 287# if defined(TIOCSCTTY)
268 fd = ioctl(fd_tty, TIOCSCTTY, NULL); 288 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
269 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); 289 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
270# elif defined(TIOCSETCTTY) 290# elif defined(TIOCSETCTTY)
271 fd = ioctl(fd_tty, TIOCSETCTTY, NULL); 291 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
272 D_TTY((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); 292 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
273# else 293# else
274 fd = open(ttydev, O_RDWR); 294 fd = open (ttydev, O_RDWR);
275 D_TTY((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); 295 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
276 if (fd >= 0) 296 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); 297 close(fd);
298# endif
285/* ---------------------------------------- */ 299 /* ---------------------------------------- */
300 fd = open ("/dev/tty", O_WRONLY);
301 D_TTY ((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
302 if (fd < 0)
303 return -1; /* fatal */
304 close (fd);
305 /* ---------------------------------------- */
286 D_TTY((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); 306 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
287/* ---------------------------------------- */ 307 /* ---------------------------------------- */
288#endif /* ! __QNX__ */ 308#endif /* ! __QNX__ */
309
289 return 0; 310 return 0;
290} 311}
291/*----------------------- end-of-file (C source) -----------------------*/ 312/*----------------------- end-of-file (C source) -----------------------*/

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