1 | /*--------------------------------*-C-*---------------------------------* |
1 | /*--------------------------------*-C-*---------------------------------* |
2 | * File: ptytty.c |
2 | * File: ptytty.C |
3 | *----------------------------------------------------------------------* |
3 | *----------------------------------------------------------------------* |
4 | * $Id: ptytty.C,v 1.4 2003/12/02 21:49:46 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> |
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7 | * Copyright (c) 2004-2006 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. |
… | |
… | |
20 | * along with this program; if not, write to the Free Software |
20 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | *---------------------------------------------------------------------*/ |
22 | *---------------------------------------------------------------------*/ |
23 | |
23 | |
24 | #include "../config.h" /* NECESSARY */ |
24 | #include "../config.h" /* NECESSARY */ |
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25 | #include "rxvt.h" |
25 | |
26 | |
26 | /* |
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27 | * Try to be self-contained except for the above autoconfig'd defines |
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28 | */ |
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29 | |
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30 | #include <stdio.h> |
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31 | #ifdef HAVE_STDLIB_H |
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32 | # include <stdlib.h> |
27 | #include <cstdlib> |
33 | #endif |
28 | #include <cstring> |
34 | #ifdef HAVE_SYS_TYPES_H |
29 | |
35 | # include <sys/types.h> |
30 | #include <sys/types.h> |
36 | #endif |
31 | #include <sys/socket.h> |
37 | #ifdef HAVE_UNISTD_H |
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38 | # include <unistd.h> |
32 | #include <unistd.h> |
39 | #endif |
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40 | #if defined(HAVE_STRING_H) |
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41 | # include <string.h> |
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42 | #endif |
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43 | #ifdef HAVE_FCNTL_H |
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44 | # include <fcntl.h> |
33 | #include <fcntl.h> |
45 | #endif |
34 | |
46 | #ifdef HAVE_SYS_IOCTL_H |
35 | #ifdef HAVE_SYS_IOCTL_H |
47 | # include <sys/ioctl.h> |
36 | # include <sys/ioctl.h> |
48 | #endif |
37 | #endif |
49 | #if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) |
38 | #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
50 | # include <sys/stropts.h> /* for I_PUSH */ |
39 | # include <sys/stropts.h> /* for I_PUSH */ |
51 | #endif |
40 | #endif |
52 | |
41 | #ifdef HAVE_ISASTREAM |
53 | #ifdef DEBUG_TTY |
42 | # include <stropts.h> |
54 | # define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) |
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55 | #else |
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56 | # define D_TTY(x) |
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57 | #endif |
43 | #endif |
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44 | #if defined(HAVE_PTY_H) |
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45 | # include <pty.h> |
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46 | #elif defined(HAVE_LIBUTIL_H) |
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47 | # include <libutil.h> |
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48 | #elif defined(HAVE_UTIL_H) |
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49 | # include <util.h> |
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50 | #endif |
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51 | |
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52 | #include <cstdio> |
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53 | #include <grp.h> |
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54 | |
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55 | #include "rxvtutil.h" |
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56 | #include "fdpass.h" |
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57 | #include "ptytty.h" |
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58 | |
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59 | ///////////////////////////////////////////////////////////////////////////// |
58 | |
60 | |
59 | /* ------------------------------------------------------------------------- * |
61 | /* ------------------------------------------------------------------------- * |
60 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
62 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
61 | * ------------------------------------------------------------------------- */ |
63 | * ------------------------------------------------------------------------- */ |
62 | /* |
64 | /* |
63 | * Returns pty file descriptor, or -1 on failure |
65 | * Returns pty file descriptor, or -1 on failure |
64 | * If successful, ttydev is set to the name of the slave device. |
66 | * If successful, ttydev is set to the name of the slave device. |
65 | * fd_tty _may_ also be set to an open fd to the slave device |
67 | * fd_tty _may_ also be set to an open fd to the slave device |
66 | */ |
68 | */ |
67 | /* EXTPROTO */ |
69 | static int |
68 | int |
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69 | rxvt_get_pty(int *fd_tty, const char **ttydev) |
70 | get_pty (int *fd_tty, char **ttydev) |
70 | { |
71 | { |
71 | int pfd; |
72 | int pfd; |
72 | |
73 | |
73 | #ifdef PTYS_ARE_OPENPTY |
74 | #ifdef PTYS_ARE_OPENPTY |
74 | |
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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 | int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
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78 | |
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79 | if (res != -1) |
78 | { |
80 | { |
79 | *ttydev = strdup(tty_name); |
81 | *ttydev = strdup (tty_name); |
80 | return pfd; |
82 | return pfd; |
81 | } |
83 | } |
82 | #endif |
84 | #endif |
83 | |
85 | |
84 | #ifdef PTYS_ARE__GETPTY |
86 | #ifdef PTYS_ARE__GETPTY |
85 | *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
87 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
86 | if (*ttydev != NULL) |
88 | if (*ttydev != NULL) |
87 | return pfd; |
89 | return pfd; |
88 | #endif |
90 | #endif |
89 | |
91 | |
90 | #ifdef PTYS_ARE_GETPTY |
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91 | |
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92 | char *ptydev; |
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93 | |
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94 | while ((ptydev = getpty()) != NULL) |
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95 | if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) |
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96 | { |
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97 | *ttydev = ptydev; |
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98 | return pfd; |
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99 | } |
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100 | #endif |
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101 | |
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102 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
92 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
103 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) |
93 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) |
104 | |
94 | |
105 | { |
95 | { |
106 | # ifdef PTYS_ARE_GETPT |
96 | # ifdef PTYS_ARE_GETPT |
107 | pfd = getpt(); |
97 | pfd = getpt(); |
108 | # else |
98 | # else |
109 | |
99 | # ifdef PTYS_ARE_POSIX |
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100 | pfd = posix_openpt (O_RDWR); |
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101 | # else |
110 | pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
102 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
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103 | # endif |
111 | # endif |
104 | # endif |
112 | |
105 | |
113 | if (pfd >= 0) |
106 | if (pfd >= 0) |
114 | { |
107 | { |
115 | if (grantpt(pfd) == 0 /* change slave permissions */ |
108 | if (grantpt (pfd) == 0 /* change slave permissions */ |
116 | && unlockpt(pfd) == 0) |
109 | && unlockpt (pfd) == 0) |
117 | { /* slave now unlocked */ |
110 | { /* slave now unlocked */ |
118 | *ttydev = ptsname(pfd); /* get slave's name */ |
111 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
119 | return pfd; |
112 | return pfd; |
120 | } |
113 | } |
121 | close(pfd); |
114 | close (pfd); |
122 | } |
115 | } |
123 | } |
116 | } |
124 | # endif |
117 | # endif |
125 | #endif |
118 | #endif |
126 | |
119 | |
127 | #ifdef PTYS_ARE_PTC |
120 | #ifdef PTYS_ARE_PTC |
128 | if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
121 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
129 | { |
122 | { |
130 | *ttydev = ttyname(pfd); |
123 | *ttydev = strdup (ttyname (pfd)); |
131 | return pfd; |
124 | return pfd; |
132 | } |
125 | } |
133 | #endif |
126 | #endif |
134 | |
127 | |
135 | #ifdef PTYS_ARE_CLONE |
128 | #ifdef PTYS_ARE_CLONE |
136 | if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
129 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
137 | { |
130 | { |
138 | *ttydev = ptsname(pfd); |
131 | *ttydev = strdup (ptsname (pfd)); |
139 | return pfd; |
132 | return pfd; |
140 | } |
133 | } |
141 | #endif |
134 | #endif |
142 | |
135 | |
143 | #ifdef PTYS_ARE_NUMERIC |
136 | #ifdef PTYS_ARE_NUMERIC |
144 | { |
137 | { |
145 | int idx; |
138 | int idx; |
146 | char *c1, *c2; |
139 | char *c1, *c2; |
147 | char pty_name[] = "/dev/ptyp???"; |
140 | char pty_name[] = "/dev/ptyp???"; |
148 | char tty_name[] = "/dev/ttyp???"; |
141 | char tty_name[] = "/dev/ttyp???"; |
149 | |
142 | |
150 | c1 = &(pty_name[sizeof(pty_name) - 4]); |
143 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
151 | c2 = &(tty_name[sizeof(tty_name) - 4]); |
144 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
152 | for (idx = 0; idx < 256; idx++) |
145 | for (idx = 0; idx < 256; idx++) |
153 | { |
146 | { |
154 | sprintf(c1, "%d", idx); |
147 | sprintf (c1, "%d", idx); |
155 | sprintf(c2, "%d", idx); |
148 | sprintf (c2, "%d", idx); |
156 | if (access(tty_name, F_OK) < 0) |
149 | if (access (tty_name, F_OK) < 0) |
157 | { |
150 | { |
158 | idx = 256; |
151 | idx = 256; |
159 | break; |
152 | break; |
160 | } |
153 | } |
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154 | |
161 | if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
155 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
162 | { |
156 | { |
163 | if (access(tty_name, R_OK | W_OK) == 0) |
157 | if (access (tty_name, R_OK | W_OK) == 0) |
164 | { |
158 | { |
165 | *ttydev = strdup(tty_name); |
159 | *ttydev = strdup (tty_name); |
166 | return pfd; |
160 | return pfd; |
167 | } |
161 | } |
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162 | |
168 | close(pfd); |
163 | close (pfd); |
169 | } |
164 | } |
170 | } |
165 | } |
171 | } |
166 | } |
172 | #endif |
167 | #endif |
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168 | |
173 | #ifdef PTYS_ARE_SEARCHED |
169 | #ifdef PTYS_ARE_SEARCHED |
174 | { |
170 | { |
175 | const char *c1, *c2; |
171 | const char *c1, *c2; |
176 | char pty_name[] = "/dev/pty??"; |
172 | char pty_name[] = "/dev/pty??"; |
177 | char tty_name[] = "/dev/tty??"; |
173 | char tty_name[] = "/dev/tty??"; |
178 | |
174 | |
179 | # ifndef PTYCHAR1 |
175 | # ifndef PTYCHAR1 |
180 | # define PTYCHAR1 "pqrstuvwxyz" |
176 | # define PTYCHAR1 "pqrstuvwxyz" |
181 | # endif |
177 | # endif |
182 | # ifndef PTYCHAR2 |
178 | # ifndef PTYCHAR2 |
183 | # define PTYCHAR2 "0123456789abcdef" |
179 | # define PTYCHAR2 "0123456789abcdef" |
184 | # endif |
180 | # endif |
185 | |
181 | |
186 | for (c1 = PTYCHAR1; *c1; c1++) |
182 | for (c1 = PTYCHAR1; *c1; c1++) |
187 | { |
183 | { |
188 | pty_name[(sizeof(pty_name) - 3)] = |
184 | pty_name[ (sizeof (pty_name) - 3)] = |
189 | tty_name[(sizeof(pty_name) - 3)] = *c1; |
185 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
190 | for (c2 = PTYCHAR2; *c2; c2++) |
186 | for (c2 = PTYCHAR2; *c2; c2++) |
191 | { |
187 | { |
192 | pty_name[(sizeof(pty_name) - 2)] = |
188 | pty_name[ (sizeof (pty_name) - 2)] = |
193 | tty_name[(sizeof(pty_name) - 2)] = *c2; |
189 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
194 | if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
190 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
195 | { |
191 | { |
196 | if (access(tty_name, R_OK | W_OK) == 0) |
192 | if (access (tty_name, R_OK | W_OK) == 0) |
197 | { |
193 | { |
198 | *ttydev = strdup(tty_name); |
194 | *ttydev = strdup (tty_name); |
199 | return pfd; |
195 | return pfd; |
200 | } |
196 | } |
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197 | |
201 | close(pfd); |
198 | close (pfd); |
202 | } |
199 | } |
203 | } |
200 | } |
204 | } |
201 | } |
205 | } |
202 | } |
206 | #endif |
203 | #endif |
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204 | |
207 | return -1; |
205 | return -1; |
208 | } |
206 | } |
209 | |
207 | |
210 | /*----------------------------------------------------------------------*/ |
208 | /*----------------------------------------------------------------------*/ |
211 | /* |
209 | /* |
212 | * Returns tty file descriptor, or -1 on failure |
210 | * Returns tty file descriptor, or -1 on failure |
213 | */ |
211 | */ |
214 | /* EXTPROTO */ |
212 | static int |
215 | int |
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216 | rxvt_get_tty (const char *ttydev) |
213 | get_tty (char *ttydev) |
217 | { |
214 | { |
218 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
215 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
219 | } |
216 | } |
220 | |
217 | |
221 | /*----------------------------------------------------------------------*/ |
218 | /*----------------------------------------------------------------------*/ |
222 | /* |
219 | /* |
223 | * Make our tty a controlling tty so that /dev/tty points to us |
220 | * Make our tty a controlling tty so that /dev/tty points to us |
224 | */ |
221 | */ |
225 | /* EXTPROTO */ |
222 | static int |
226 | int |
223 | control_tty (int fd_tty) |
227 | rxvt_control_tty (int fd_tty, const char *ttydev) |
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228 | { |
224 | { |
229 | #ifndef __QNX__ |
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230 | int fd; |
225 | int fd; |
231 | |
226 | |
232 | D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev)); |
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233 | /* ---------------------------------------- */ |
227 | /* ---------------------------------------- */ |
234 | # ifdef HAVE_SETSID |
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235 | setsid (); |
228 | setsid (); |
236 | # endif |
229 | |
237 | # if defined(HAVE_SETPGID) |
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238 | setpgid (0, 0); |
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239 | # elif defined(HAVE_SETPGRP) |
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240 | setpgrp (0, 0); |
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241 | # endif |
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242 | /* ---------------------------------------- */ |
230 | /* ---------------------------------------- */ |
243 | # ifdef TIOCNOTTY |
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244 | |
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245 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
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246 | D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); |
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247 | if (fd >= 0) |
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248 | { |
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249 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
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250 | close (fd); |
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251 | } |
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252 | # endif |
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253 | /* ---------------------------------------- */ |
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254 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
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255 | D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); |
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256 | if (fd >= 0) |
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257 | close (fd); /* ouch: still have controlling tty */ |
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258 | /* ---------------------------------------- */ |
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259 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
231 | # if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
260 | /* |
232 | /* |
261 | * Push STREAMS modules: |
233 | * Push STREAMS modules: |
262 | * ptem: pseudo-terminal hardware emulation module. |
234 | * ptem: pseudo-terminal hardware emulation module. |
263 | * ldterm: standard terminal line discipline. |
235 | * ldterm: standard terminal line discipline. |
264 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
236 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
265 | * |
237 | * |
266 | * After we push the STREAMS modules, the first open() on the slave side |
238 | * After we push the STREAMS modules, the first open () on the slave side |
267 | * (i.e. the next section between the dashes giving us "tty opened OK") |
239 | * (i.e. the next section between the dashes giving us "tty opened OK") |
268 | * should make the "ptem" (or "ldterm" depending upon either which OS |
240 | * should make the "ptem" (or "ldterm" depending upon either which OS |
269 | * version or which set of manual pages you have) module give us a |
241 | * version or which set of manual pages you have) module give us a |
270 | * controlling terminal. We must already have close()d the master side |
242 | * controlling terminal. We must already have close ()d the master side |
271 | * fd in this child process before we push STREAMS modules on because the |
243 | * fd in this child process before we push STREAMS modules on because the |
272 | * documentation is really unclear about whether it is any close() on |
244 | * documentation is really unclear about whether it is any close () on |
273 | * the master side or the last close() - i.e. a proper STREAMS dismantling |
245 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
274 | * close() - on the master side which causes a hang up to be sent |
246 | * close () - on the master side which causes a hang up to be sent |
275 | * through - Geoff Wing |
247 | * through - Geoff Wing |
276 | */ |
248 | */ |
277 | # ifdef HAVE_ISASTREAM |
249 | # ifdef HAVE_ISASTREAM |
278 | if (isastream (fd_tty) == 1) |
250 | if (isastream (fd_tty) == 1) |
279 | # endif |
251 | # endif |
280 | { |
252 | { |
281 | D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules")); |
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282 | ioctl (fd_tty, I_PUSH, "ptem"); |
253 | ioctl (fd_tty, I_PUSH, "ptem"); |
283 | ioctl (fd_tty, I_PUSH, "ldterm"); |
254 | ioctl (fd_tty, I_PUSH, "ldterm"); |
284 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
255 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
285 | } |
256 | } |
286 | #endif |
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287 | /* ---------------------------------------- */ |
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288 | # if defined(TIOCSCTTY) |
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289 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
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290 | D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd)); |
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291 | # elif defined(TIOCSETCTTY) |
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292 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
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293 | D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd)); |
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294 | # else |
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295 | fd = open (ttydev, O_RDWR); |
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296 | D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK")); |
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297 | if (fd >= 0) |
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298 | close(fd); |
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299 | # endif |
257 | # endif |
300 | /* ---------------------------------------- */ |
258 | /* ---------------------------------------- */ |
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259 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
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260 | /* ---------------------------------------- */ |
301 | fd = open ("/dev/tty", O_WRONLY); |
261 | 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)")); |
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303 | if (fd < 0) |
262 | if (fd < 0) |
304 | return -1; /* fatal */ |
263 | return -1; /* fatal */ |
305 | close (fd); |
264 | close (fd); |
306 | /* ---------------------------------------- */ |
265 | /* ---------------------------------------- */ |
307 | D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp())); |
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308 | /* ---------------------------------------- */ |
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309 | #endif /* ! __QNX__ */ |
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310 | |
266 | |
311 | return 0; |
267 | return 0; |
312 | } |
268 | } |
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269 | |
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270 | void |
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271 | rxvt_ptytty::close_tty () |
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272 | { |
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273 | if (tty < 0) |
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274 | return; |
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275 | |
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276 | close (tty); |
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277 | tty = -1; |
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278 | } |
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279 | |
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280 | bool |
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281 | rxvt_ptytty::make_controlling_tty () |
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282 | { |
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283 | return control_tty (tty) >= 0; |
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284 | } |
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285 | |
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286 | void |
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287 | rxvt_ptytty::set_utf8_mode (bool on) |
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288 | { |
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289 | #ifdef IUTF8 |
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290 | if (pty < 0) |
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291 | return; |
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292 | |
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293 | struct termios tio; |
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294 | |
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295 | if (tcgetattr (pty, &tio) != -1) |
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296 | { |
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297 | tcflag_t new_cflag = tio.c_iflag; |
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298 | |
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299 | if (on) |
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300 | new_cflag |= IUTF8; |
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301 | else |
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302 | new_cflag &= ~IUTF8; |
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303 | |
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304 | if (new_cflag != tio.c_iflag) |
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305 | { |
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306 | tio.c_iflag = new_cflag; |
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307 | tcsetattr (pty, TCSANOW, &tio); |
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308 | } |
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309 | } |
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310 | #endif |
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311 | } |
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312 | |
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313 | ///////////////////////////////////////////////////////////////////////////// |
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314 | |
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315 | #ifndef NO_SETOWNER_TTYDEV |
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316 | static struct ttyconf { |
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317 | gid_t gid; |
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318 | mode_t mode; |
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319 | |
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320 | ttyconf () |
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321 | { |
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322 | #ifdef TTY_GID_SUPPORT |
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323 | struct group *gr = getgrnam ("tty"); |
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324 | |
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325 | if (gr) |
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326 | { /* change group ownership of tty to "tty" */ |
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327 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
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328 | gid = gr->gr_gid; |
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329 | } |
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330 | else |
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331 | #endif /* TTY_GID_SUPPORT */ |
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332 | { |
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333 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
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334 | gid = getgid (); |
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335 | } |
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336 | } |
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337 | } ttyconf; |
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338 | |
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339 | ///////////////////////////////////////////////////////////////////////////// |
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340 | |
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341 | void |
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342 | rxvt_ptytty_unix::privileges (rxvt_privaction action) |
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343 | { |
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344 | if (!name || !*name) |
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345 | return; |
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346 | |
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347 | if (action == SAVE) |
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348 | { |
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349 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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350 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
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351 | if (lstat (name, &savestat) < 0) /* you lose out */ |
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352 | ; |
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353 | else |
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354 | # endif |
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355 | { |
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356 | saved = true; |
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357 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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358 | chmod (name, ttyconf.mode); |
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359 | # ifdef HAVE_REVOKE |
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360 | revoke (name); |
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361 | # endif |
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362 | } |
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363 | } |
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364 | else |
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365 | { /* action == RESTORE */ |
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366 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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367 | if (saved) |
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368 | { |
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369 | chmod (name, savestat.st_mode); |
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370 | chown (name, savestat.st_uid, savestat.st_gid); |
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371 | } |
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372 | # else |
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373 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
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374 | chown (name, 0, 0); |
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375 | # endif |
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376 | |
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377 | } |
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378 | } |
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379 | #endif |
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380 | |
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381 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
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382 | { |
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383 | pty = tty = -1; |
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384 | name = 0; |
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385 | #ifndef NO_SETOWNER_TTYDEV |
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386 | saved = false; |
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387 | #endif |
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388 | #if UTMP_SUPPORT |
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389 | cmd_pid = 0; |
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390 | #endif |
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391 | } |
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392 | |
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393 | rxvt_ptytty_unix::~rxvt_ptytty_unix () |
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394 | { |
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395 | #if UTMP_SUPPORT |
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396 | logout (); |
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397 | #endif |
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398 | put (); |
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399 | } |
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400 | |
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401 | void |
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402 | rxvt_ptytty_unix::put () |
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403 | { |
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404 | #ifndef NO_SETOWNER_TTYDEV |
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405 | privileges (RESTORE); |
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406 | #endif |
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407 | |
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408 | if (pty >= 0) close (pty); |
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409 | close_tty (); |
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410 | free (name); |
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411 | |
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412 | pty = tty = -1; |
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413 | name = 0; |
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414 | } |
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415 | |
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416 | bool |
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417 | rxvt_ptytty_unix::get () |
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418 | { |
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419 | /* get master (pty) */ |
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420 | if ((pty = get_pty (&tty, &name)) < 0) |
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421 | return false; |
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422 | |
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423 | fcntl (pty, F_SETFL, O_NONBLOCK); |
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424 | |
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425 | /* get slave (tty) */ |
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426 | if (tty < 0) |
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427 | { |
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428 | #ifndef NO_SETOWNER_TTYDEV |
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429 | privileges (SAVE); |
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430 | #endif |
|
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431 | |
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432 | if ((tty = get_tty (name)) < 0) |
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433 | { |
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434 | put (); |
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435 | return false; |
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436 | } |
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437 | } |
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438 | |
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439 | return true; |
|
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440 | } |
|
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441 | |
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442 | #if PTYTTY_HELPER |
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443 | |
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444 | static int sock_fd; |
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445 | static int pid; |
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446 | |
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447 | struct command |
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448 | { |
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449 | enum { get, login, destroy } type; |
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450 | |
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451 | rxvt_ptytty *id; |
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452 | |
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453 | bool login_shell; |
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454 | int cmd_pid; |
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455 | char hostname[512]; // arbitrary, but should be plenty |
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456 | }; |
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457 | |
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458 | struct rxvt_ptytty_proxy : zero_initialized, rxvt_ptytty |
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459 | { |
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460 | rxvt_ptytty *id; |
|
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461 | |
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462 | ~rxvt_ptytty_proxy (); |
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463 | |
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464 | bool get (); |
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465 | void login (int cmd_pid, bool login_shell, const char *hostname); |
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466 | }; |
|
|
467 | |
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468 | bool |
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469 | rxvt_ptytty_proxy::get () |
|
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470 | { |
|
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471 | command cmd; |
|
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472 | |
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473 | cmd.type = command::get; |
|
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474 | |
|
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475 | write (sock_fd, &cmd, sizeof (cmd)); |
|
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476 | |
|
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477 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
|
|
478 | rxvt_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
|
|
479 | |
|
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480 | if (!id) |
|
|
481 | return false; |
|
|
482 | |
|
|
483 | if ((pty = rxvt_recv_fd (sock_fd)) < 0 |
|
|
484 | || (tty = rxvt_recv_fd (sock_fd)) < 0) |
|
|
485 | rxvt_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
|
|
486 | |
|
|
487 | return true; |
|
|
488 | } |
|
|
489 | |
|
|
490 | void |
|
|
491 | rxvt_ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
|
|
492 | { |
|
|
493 | command cmd; |
|
|
494 | |
|
|
495 | cmd.type = command::login; |
|
|
496 | cmd.id = id; |
|
|
497 | cmd.cmd_pid = cmd_pid; |
|
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498 | cmd.login_shell = login_shell; |
|
|
499 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
|
|
500 | |
|
|
501 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
502 | } |
|
|
503 | |
|
|
504 | rxvt_ptytty_proxy::~rxvt_ptytty_proxy () |
|
|
505 | { |
|
|
506 | command cmd; |
|
|
507 | |
|
|
508 | cmd.type = command::destroy; |
|
|
509 | cmd.id = id; |
|
|
510 | |
|
|
511 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
512 | } |
|
|
513 | |
|
|
514 | static |
|
|
515 | void serve () |
|
|
516 | { |
|
|
517 | command cmd; |
|
|
518 | vector<rxvt_ptytty *> ptys; |
|
|
519 | |
|
|
520 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
|
|
521 | { |
|
|
522 | if (cmd.type == command::get) |
|
|
523 | { |
|
|
524 | // -> id ptyfd ttyfd |
|
|
525 | cmd.id = new rxvt_ptytty_unix; |
|
|
526 | |
|
|
527 | if (cmd.id->get ()) |
|
|
528 | { |
|
|
529 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
530 | ptys.push_back (cmd.id); |
|
|
531 | |
|
|
532 | rxvt_send_fd (sock_fd, cmd.id->pty); |
|
|
533 | rxvt_send_fd (sock_fd, cmd.id->tty); |
|
|
534 | } |
|
|
535 | else |
|
|
536 | { |
|
|
537 | delete cmd.id; |
|
|
538 | cmd.id = 0; |
|
|
539 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
540 | } |
|
|
541 | } |
|
|
542 | else if (cmd.type == command::login) |
|
|
543 | { |
|
|
544 | #if UTMP_SUPPORT |
|
|
545 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
|
|
546 | { |
|
|
547 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
|
|
548 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
|
|
549 | } |
|
|
550 | #endif |
|
|
551 | } |
|
|
552 | else if (cmd.type == command::destroy) |
|
|
553 | { |
|
|
554 | rxvt_ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
|
|
555 | |
|
|
556 | if (pty) |
|
|
557 | { |
|
|
558 | delete *pty; |
|
|
559 | ptys.erase (pty); |
|
|
560 | } |
|
|
561 | } |
|
|
562 | else |
|
|
563 | break; |
|
|
564 | } |
|
|
565 | |
|
|
566 | // destroy all ptys |
|
|
567 | for (rxvt_ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
|
|
568 | delete *i; |
|
|
569 | } |
|
|
570 | |
|
|
571 | void rxvt_ptytty_server () |
|
|
572 | { |
|
|
573 | int sv[2]; |
|
|
574 | |
|
|
575 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
|
|
576 | rxvt_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
|
|
577 | |
|
|
578 | pid = fork (); |
|
|
579 | |
|
|
580 | if (pid < 0) |
|
|
581 | rxvt_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
|
|
582 | |
|
|
583 | if (pid) |
|
|
584 | { |
|
|
585 | // client, urxvt |
|
|
586 | sock_fd = sv[0]; |
|
|
587 | close (sv[1]); |
|
|
588 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
|
|
589 | } |
|
|
590 | else |
|
|
591 | { |
|
|
592 | setgid (getegid ()); |
|
|
593 | setuid (geteuid ()); |
|
|
594 | |
|
|
595 | // server, pty-helper |
|
|
596 | sock_fd = sv[1]; |
|
|
597 | |
|
|
598 | for (int fd = 0; fd < 1023; fd++) |
|
|
599 | if (fd != sock_fd && fd != 1) |
|
|
600 | close (fd); |
|
|
601 | |
|
|
602 | serve (); |
|
|
603 | _exit (EXIT_SUCCESS); |
|
|
604 | } |
|
|
605 | } |
|
|
606 | #endif |
|
|
607 | |
|
|
608 | // a "factory" *g* |
|
|
609 | rxvt_ptytty * |
|
|
610 | rxvt_new_ptytty () |
|
|
611 | { |
|
|
612 | #if PTYTTY_HELPER |
|
|
613 | if (pid > 0) |
|
|
614 | // use helper process |
|
|
615 | return new rxvt_ptytty_proxy; |
|
|
616 | else |
|
|
617 | #endif |
|
|
618 | return new rxvt_ptytty_unix; |
|
|
619 | } |
|
|
620 | |
313 | /*----------------------- end-of-file (C source) -----------------------*/ |
621 | /*----------------------- end-of-file (C source) -----------------------*/ |
|
|
622 | |