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 $ |
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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 | |
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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 */ |
69 | int |
67 | int |
70 | rxvt_get_pty(int *fd_tty, const char **ttydev) |
68 | rxvt_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 |
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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) |
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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_NONBLOCK | 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 |
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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) |
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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) |
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103 | |
101 | { |
104 | { |
102 | # ifdef PTYS_ARE_GETPT |
105 | # ifdef PTYS_ARE_GETPT |
103 | pfd = getpt(); |
106 | pfd = getpt(); |
104 | # else |
107 | # else |
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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 |
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111 | |
107 | if (pfd >= 0) { |
112 | if (pfd >= 0) |
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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) |
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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 | } |
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115 | } |
121 | } |
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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) |
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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) |
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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++) |
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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; |
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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) |
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161 | { |
150 | if (access(tty_name, R_OK | W_OK) == 0) { |
162 | if (access(tty_name, R_OK | W_OK) == 0) |
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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 | } |
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157 | } |
169 | } |
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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 |
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184 | |
171 | for (c1 = PTYCHAR1; *c1; c1++) { |
185 | for (c1 = PTYCHAR1; *c1; c1++) |
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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++) |
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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) |
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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 | } |
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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 */ |
196 | int |
214 | int |
197 | rxvt_get_tty(const char *ttydev) |
215 | rxvt_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 */ |
207 | int |
225 | int |
208 | rxvt_control_tty(int fd_tty, const char *ttydev) |
226 | rxvt_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 |
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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) |
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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); |
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278 | # endif |
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279 | /* ---------------------------------------- */ |
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280 | fd = open("/dev/tty", O_WRONLY); |
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281 | D_TTY((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); |
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282 | if (fd < 0) |
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283 | return -1; /* fatal */ |
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284 | close(fd); |
297 | close(fd); |
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298 | # endif |
285 | /* ---------------------------------------- */ |
299 | /* ---------------------------------------- */ |
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300 | fd = open ("/dev/tty", O_WRONLY); |
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301 | D_TTY ((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); |
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302 | if (fd < 0) |
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303 | return -1; /* fatal */ |
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304 | close (fd); |
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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__ */ |
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309 | |
289 | return 0; |
310 | return 0; |
290 | } |
311 | } |
291 | /*----------------------- end-of-file (C source) -----------------------*/ |
312 | /*----------------------- end-of-file (C source) -----------------------*/ |