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1 | // This file is part of libptytty. Do not make local modifications. |
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2 | // http://software.schmorp.de/pkg/libptytty |
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3 | |
1 | /*--------------------------------*-C-*---------------------------------* |
4 | /*----------------------------------------------------------------------* |
2 | * File: ptytty.C |
5 | * File: ptytty.C |
3 | *----------------------------------------------------------------------* |
6 | *----------------------------------------------------------------------* |
4 | * |
7 | * |
5 | * All portions of code are copyright by their respective author/s. |
8 | * All portions of code are copyright by their respective author/s. |
6 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
7 | * Copyright (c) 2004 Marc Lehmann <pcg@goof.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
8 | * |
11 | * |
9 | * This program is free software; you can redistribute it and/or modify |
12 | * 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 |
13 | * 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 |
14 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
15 | * (at your option) any later version. |
… | |
… | |
19 | * You should have received a copy of the GNU General Public License |
22 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
23 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | *---------------------------------------------------------------------*/ |
25 | *---------------------------------------------------------------------*/ |
23 | |
26 | |
24 | #include "../config.h" /* NECESSARY */ |
27 | #include "../config.h" |
25 | |
28 | |
26 | /* |
29 | #include "fdpass.h" |
27 | * Try to be self-contained except for the above autoconfig'd defines |
30 | #include "ptytty.h" |
28 | */ |
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29 | |
31 | |
30 | #if 0 |
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31 | #ifdef HAVE_GETPT |
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32 | # define _GNU_SOURCE |
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33 | #endif |
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34 | #endif |
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35 | |
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36 | #include <cstdio> |
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37 | #ifdef HAVE_STDLIB_H |
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38 | # include <cstdlib> |
32 | #include <cstdlib> |
39 | #endif |
33 | #include <cstring> |
40 | #ifdef HAVE_SYS_TYPES_H |
34 | |
41 | # include <sys/types.h> |
35 | #include <sys/types.h> |
42 | #endif |
36 | #include <sys/socket.h> |
43 | #ifdef HAVE_UNISTD_H |
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44 | # include <unistd.h> |
37 | #include <unistd.h> |
45 | #endif |
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46 | #if defined(HAVE_STRING_H) |
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47 | # include <cstring> |
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48 | #endif |
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49 | #ifdef HAVE_FCNTL_H |
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50 | # include <fcntl.h> |
38 | #include <fcntl.h> |
51 | #endif |
39 | |
52 | #ifdef HAVE_SYS_IOCTL_H |
40 | #ifdef HAVE_SYS_IOCTL_H |
53 | # include <sys/ioctl.h> |
41 | # include <sys/ioctl.h> |
54 | #endif |
42 | #endif |
55 | #if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) |
43 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
56 | # include <sys/stropts.h> /* for I_PUSH */ |
44 | # include <sys/stropts.h> /* for I_PUSH */ |
57 | #endif |
45 | #endif |
58 | #ifdef HAVE_ISASTREAM |
46 | #ifdef HAVE_ISASTREAM |
59 | # include <stropts.h> |
47 | # include <stropts.h> |
60 | #endif |
48 | #endif |
61 | |
49 | #if defined(HAVE_PTY_H) |
62 | #ifdef DEBUG_TTY |
50 | # include <pty.h> |
63 | # define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) |
51 | #elif defined(HAVE_LIBUTIL_H) |
64 | #else |
52 | # include <libutil.h> |
65 | # define D_TTY(x) |
53 | #elif defined(HAVE_UTIL_H) |
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54 | # include <util.h> |
66 | #endif |
55 | #endif |
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56 | #ifdef TTY_GID_SUPPORT |
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57 | #include <grp.h> |
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58 | #endif |
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59 | |
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60 | #include <cstdio> |
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61 | |
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62 | ///////////////////////////////////////////////////////////////////////////// |
67 | |
63 | |
68 | /* ------------------------------------------------------------------------- * |
64 | /* ------------------------------------------------------------------------- * |
69 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
70 | * ------------------------------------------------------------------------- */ |
66 | * ------------------------------------------------------------------------- */ |
71 | /* |
67 | /* |
72 | * Returns pty file descriptor, or -1 on failure |
68 | * Returns pty file descriptor, or -1 on failure |
73 | * If successful, ttydev is set to the name of the slave device. |
69 | * If successful, ttydev is set to the name of the slave device. |
74 | * fd_tty _may_ also be set to an open fd to the slave device |
70 | * fd_tty _may_ also be set to an open fd to the slave device |
75 | */ |
71 | */ |
76 | /* EXTPROTO */ |
72 | #if defined(UNIX98_PTY) |
77 | int |
73 | static int |
78 | rxvt_get_pty (int *fd_tty, const char **ttydev) |
74 | get_pty (int *fd_tty, char **ttydev) |
79 | { |
75 | { |
80 | int pfd; |
76 | int pfd; |
81 | |
77 | |
82 | #ifdef PTYS_ARE_OPENPTY |
78 | # if defined(HAVE_GETPT) |
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79 | pfd = getpt(); |
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80 | # elif defined(HAVE_POSIX_OPENPT) |
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81 | pfd = posix_openpt (O_RDWR); |
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82 | # else |
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83 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
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84 | # endif |
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85 | if (pfd >= 0) |
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86 | { |
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87 | if (grantpt (pfd) == 0 /* change slave permissions */ |
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88 | && unlockpt (pfd) == 0) |
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89 | { /* slave now unlocked */ |
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90 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
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91 | return pfd; |
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92 | } |
83 | |
93 | |
84 | char tty_name[sizeof "/dev/pts/????\0"]; |
94 | close (pfd); |
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95 | } |
85 | |
96 | |
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97 | return -1; |
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98 | } |
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99 | #elif defined(HAVE_OPENPTY) |
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100 | static int |
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101 | get_pty (int *fd_tty, char **ttydev) |
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102 | { |
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103 | int pfd; |
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104 | int res; |
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105 | char tty_name[32]; |
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106 | |
86 | if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) |
107 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
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108 | if (res != -1) |
87 | { |
109 | { |
88 | *ttydev = strdup (tty_name); |
110 | *ttydev = strdup (tty_name); |
89 | return pfd; |
111 | return pfd; |
90 | } |
112 | } |
91 | #endif |
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92 | |
113 | |
93 | #ifdef PTYS_ARE__GETPTY |
114 | return -1; |
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115 | } |
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116 | #elif defined(HAVE__GETPTY) |
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117 | static int |
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118 | get_pty (int *fd_tty, char **ttydev) |
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119 | { |
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120 | int pfd; |
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121 | |
94 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
122 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
95 | if (*ttydev != NULL) |
123 | if (*ttydev != NULL) |
96 | return pfd; |
124 | return pfd; |
97 | #endif |
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98 | |
125 | |
99 | #ifdef PTYS_ARE_GETPTY |
126 | return -1; |
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127 | } |
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128 | #elif defined(HAVE_DEV_PTC) |
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129 | static int |
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130 | get_pty (int *fd_tty, char **ttydev) |
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131 | { |
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132 | int pfd; |
100 | |
133 | |
101 | char *ptydev; |
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102 | |
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103 | while ((ptydev = getpty ()) != NULL) |
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104 | if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) |
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105 | { |
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106 | *ttydev = ptydev; |
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107 | return pfd; |
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108 | } |
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109 | #endif |
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110 | |
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111 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
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112 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) |
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113 | |
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114 | { |
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115 | # ifdef PTYS_ARE_GETPT |
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116 | pfd = getpt (); |
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117 | # else |
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118 | |
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119 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
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120 | # endif |
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121 | |
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122 | if (pfd >= 0) |
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123 | { |
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124 | if (grantpt (pfd) == 0 /* change slave permissions */ |
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125 | && unlockpt (pfd) == 0) |
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126 | { /* slave now unlocked */ |
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127 | *ttydev = ptsname (pfd); /* get slave's name */ |
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128 | return pfd; |
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129 | } |
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130 | close (pfd); |
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131 | } |
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132 | } |
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133 | # endif |
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134 | #endif |
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135 | |
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136 | #ifdef PTYS_ARE_PTC |
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137 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
134 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
138 | { |
135 | { |
139 | *ttydev = ttyname (pfd); |
136 | *ttydev = strdup (ttyname (pfd)); |
140 | return pfd; |
137 | return pfd; |
141 | } |
138 | } |
142 | #endif |
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143 | |
139 | |
144 | #ifdef PTYS_ARE_CLONE |
140 | return -1; |
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141 | } |
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142 | #elif defined(HAVE_DEV_CLONE) |
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143 | static int |
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144 | get_pty (int *fd_tty, char **ttydev) |
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145 | { |
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146 | int pfd; |
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147 | |
145 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
148 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
146 | { |
149 | { |
147 | *ttydev = ptsname (pfd); |
150 | *ttydev = strdup (ptsname (pfd)); |
148 | return pfd; |
151 | return pfd; |
149 | } |
152 | } |
150 | #endif |
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151 | |
153 | |
152 | #ifdef PTYS_ARE_NUMERIC |
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153 | { |
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154 | int idx; |
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155 | char *c1, *c2; |
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156 | char pty_name[] = "/dev/ptyp???"; |
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157 | char tty_name[] = "/dev/ttyp???"; |
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158 | |
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159 | c1 = & (pty_name[sizeof (pty_name) - 4]); |
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160 | c2 = & (tty_name[sizeof (tty_name) - 4]); |
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161 | for (idx = 0; idx < 256; idx++) |
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162 | { |
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163 | sprintf (c1, "%d", idx); |
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164 | sprintf (c2, "%d", idx); |
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165 | if (access (tty_name, F_OK) < 0) |
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166 | { |
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167 | idx = 256; |
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168 | break; |
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169 | } |
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170 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
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171 | { |
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172 | if (access (tty_name, R_OK | W_OK) == 0) |
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173 | { |
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174 | *ttydev = strdup (tty_name); |
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175 | return pfd; |
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176 | } |
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177 | close (pfd); |
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178 | } |
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179 | } |
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180 | } |
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181 | #endif |
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182 | #ifdef PTYS_ARE_SEARCHED |
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183 | { |
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184 | const char *c1, *c2; |
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185 | char pty_name[] = "/dev/pty??"; |
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186 | char tty_name[] = "/dev/tty??"; |
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187 | |
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188 | # ifndef PTYCHAR1 |
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189 | # define PTYCHAR1 "pqrstuvwxyz" |
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190 | # endif |
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191 | # ifndef PTYCHAR2 |
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192 | # define PTYCHAR2 "0123456789abcdef" |
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193 | # endif |
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194 | |
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195 | for (c1 = PTYCHAR1; *c1; c1++) |
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196 | { |
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197 | pty_name[ (sizeof (pty_name) - 3)] = |
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198 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
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199 | for (c2 = PTYCHAR2; *c2; c2++) |
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200 | { |
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201 | pty_name[ (sizeof (pty_name) - 2)] = |
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202 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
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203 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
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204 | { |
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205 | if (access (tty_name, R_OK | W_OK) == 0) |
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206 | { |
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207 | *ttydev = strdup (tty_name); |
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208 | return pfd; |
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209 | } |
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210 | close (pfd); |
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211 | } |
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212 | } |
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213 | } |
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214 | } |
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215 | #endif |
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216 | return -1; |
154 | return -1; |
217 | } |
155 | } |
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156 | #else |
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157 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
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158 | static int |
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159 | get_pty (int *fd_tty, char **ttydev) |
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160 | { |
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161 | int pfd; |
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162 | int i; |
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163 | char pty_name[32]; |
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164 | char tty_name[32]; |
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165 | const char *majors = "pqrstuvwxyzabcde"; |
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166 | const char *minors = "0123456789abcdef"; |
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167 | for (i = 0; i < 256; i++) |
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168 | { |
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169 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
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170 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
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171 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
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172 | { |
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173 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
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174 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
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175 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
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176 | continue; |
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177 | } |
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178 | if (access (tty_name, R_OK | W_OK) == 0) |
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179 | { |
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180 | *ttydev = strdup (tty_name); |
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181 | return pfd; |
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182 | } |
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183 | |
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184 | close (pfd); |
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185 | } |
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186 | } |
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187 | #endif |
218 | |
188 | |
219 | /*----------------------------------------------------------------------*/ |
189 | /*----------------------------------------------------------------------*/ |
220 | /* |
190 | /* |
221 | * Returns tty file descriptor, or -1 on failure |
191 | * Returns tty file descriptor, or -1 on failure |
222 | */ |
192 | */ |
223 | /* EXTPROTO */ |
193 | static int |
224 | int |
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225 | rxvt_get_tty (const char *ttydev) |
194 | get_tty (char *ttydev) |
226 | { |
195 | { |
227 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
196 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
228 | } |
197 | } |
229 | |
198 | |
230 | /*----------------------------------------------------------------------*/ |
199 | /*----------------------------------------------------------------------*/ |
231 | /* |
200 | /* |
232 | * Make our tty a controlling tty so that /dev/tty points to us |
201 | * Make our tty a controlling tty so that /dev/tty points to us |
233 | */ |
202 | */ |
234 | /* EXTPROTO */ |
203 | static int |
235 | int |
204 | control_tty (int fd_tty) |
236 | rxvt_control_tty (int fd_tty, const char *ttydev) |
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237 | { |
205 | { |
238 | #ifndef __QNX__ |
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239 | int fd; |
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240 | |
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241 | D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev)); |
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242 | /* ---------------------------------------- */ |
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243 | # ifdef HAVE_SETSID |
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244 | setsid (); |
206 | setsid (); |
245 | # endif |
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246 | # if defined(HAVE_SETPGID) |
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247 | setpgid (0, 0); |
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248 | # elif defined(HAVE_SETPGRP) |
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249 | setpgrp (0, 0); |
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250 | # endif |
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251 | /* ---------------------------------------- */ |
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252 | # ifdef TIOCNOTTY |
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253 | |
207 | |
254 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
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255 | D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); |
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256 | if (fd >= 0) |
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257 | { |
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258 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
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259 | close (fd); |
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260 | } |
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261 | # endif |
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262 | /* ---------------------------------------- */ |
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263 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
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264 | D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); |
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265 | if (fd >= 0) |
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266 | close (fd); /* ouch: still have controlling tty */ |
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267 | /* ---------------------------------------- */ |
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268 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
208 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
269 | /* |
209 | /* |
270 | * Push STREAMS modules: |
210 | * Push STREAMS modules: |
271 | * ptem: pseudo-terminal hardware emulation module. |
211 | * ptem: pseudo-terminal hardware emulation module. |
272 | * ldterm: standard terminal line discipline. |
212 | * ldterm: standard terminal line discipline. |
273 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
213 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
… | |
… | |
285 | */ |
225 | */ |
286 | # ifdef HAVE_ISASTREAM |
226 | # ifdef HAVE_ISASTREAM |
287 | if (isastream (fd_tty) == 1) |
227 | if (isastream (fd_tty) == 1) |
288 | # endif |
228 | # endif |
289 | { |
229 | { |
290 | D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules")); |
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291 | ioctl (fd_tty, I_PUSH, "ptem"); |
230 | ioctl (fd_tty, I_PUSH, "ptem"); |
292 | ioctl (fd_tty, I_PUSH, "ldterm"); |
231 | ioctl (fd_tty, I_PUSH, "ldterm"); |
293 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
232 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
294 | } |
233 | } |
295 | #endif |
234 | #endif |
296 | /* ---------------------------------------- */ |
235 | |
297 | # if defined(TIOCSCTTY) |
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298 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
236 | ioctl (fd_tty, TIOCSCTTY, NULL); |
299 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); |
237 | |
300 | # elif defined(TIOCSETCTTY) |
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301 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
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302 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd)); |
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303 | # else |
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304 | fd = open (ttydev, O_RDWR); |
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305 | D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK")); |
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306 | if (fd >= 0) |
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307 | close (fd); |
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308 | # endif |
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309 | /* ---------------------------------------- */ |
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310 | fd = open ("/dev/tty", O_WRONLY); |
238 | int fd = open ("/dev/tty", O_WRONLY); |
311 | D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); |
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312 | if (fd < 0) |
239 | if (fd < 0) |
313 | return -1; /* fatal */ |
240 | return -1; /* fatal */ |
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241 | |
314 | close (fd); |
242 | close (fd); |
315 | /* ---------------------------------------- */ |
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316 | D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ())); |
|
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317 | /* ---------------------------------------- */ |
|
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318 | #endif /* ! __QNX__ */ |
|
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319 | |
243 | |
320 | return 0; |
244 | return 0; |
321 | } |
245 | } |
|
|
246 | |
|
|
247 | void |
|
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248 | ptytty::close_tty () |
|
|
249 | { |
|
|
250 | if (tty < 0) |
|
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251 | return; |
|
|
252 | |
|
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253 | close (tty); |
|
|
254 | tty = -1; |
|
|
255 | } |
|
|
256 | |
|
|
257 | bool |
|
|
258 | ptytty::make_controlling_tty () |
|
|
259 | { |
|
|
260 | return control_tty (tty) >= 0; |
|
|
261 | } |
|
|
262 | |
|
|
263 | void |
|
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264 | ptytty::set_utf8_mode (bool on) |
|
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265 | { |
|
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266 | #ifdef IUTF8 |
|
|
267 | if (pty < 0) |
|
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268 | return; |
|
|
269 | |
|
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270 | struct termios tio; |
|
|
271 | |
|
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272 | if (tcgetattr (pty, &tio) != -1) |
|
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273 | { |
|
|
274 | tcflag_t new_cflag = tio.c_iflag; |
|
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275 | |
|
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276 | if (on) |
|
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277 | new_cflag |= IUTF8; |
|
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278 | else |
|
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279 | new_cflag &= ~IUTF8; |
|
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280 | |
|
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281 | if (new_cflag != tio.c_iflag) |
|
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282 | { |
|
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283 | tio.c_iflag = new_cflag; |
|
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284 | tcsetattr (pty, TCSANOW, &tio); |
|
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285 | } |
|
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286 | } |
|
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287 | #endif |
|
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288 | } |
|
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289 | |
|
|
290 | static struct ttyconf { |
|
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291 | gid_t gid; |
|
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292 | mode_t mode; |
|
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293 | |
|
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294 | ttyconf () |
|
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295 | { |
|
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296 | #ifdef TTY_GID_SUPPORT |
|
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297 | struct group *gr = getgrnam ("tty"); |
|
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298 | |
|
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299 | if (gr) |
|
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300 | { /* change group ownership of tty to "tty" */ |
|
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301 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
|
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302 | gid = gr->gr_gid; |
|
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303 | } |
|
|
304 | else |
|
|
305 | #endif /* TTY_GID_SUPPORT */ |
|
|
306 | { |
|
|
307 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
|
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308 | gid = 0; |
|
|
309 | } |
|
|
310 | } |
|
|
311 | } ttyconf; |
|
|
312 | |
|
|
313 | ptytty_unix::ptytty_unix () |
|
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314 | { |
|
|
315 | name = 0; |
|
|
316 | #if UTMP_SUPPORT |
|
|
317 | cmd_pid = 0; |
|
|
318 | #endif |
|
|
319 | } |
|
|
320 | |
|
|
321 | ptytty_unix::~ptytty_unix () |
|
|
322 | { |
|
|
323 | #if UTMP_SUPPORT |
|
|
324 | logout (); |
|
|
325 | #endif |
|
|
326 | put (); |
|
|
327 | } |
|
|
328 | |
|
|
329 | void |
|
|
330 | ptytty_unix::put () |
|
|
331 | { |
|
|
332 | chmod (name, RESTORE_TTY_MODE); |
|
|
333 | chown (name, 0, ttyconf.gid); |
|
|
334 | |
|
|
335 | close_tty (); |
|
|
336 | |
|
|
337 | if (pty >= 0) |
|
|
338 | close (pty); |
|
|
339 | |
|
|
340 | free (name); |
|
|
341 | |
|
|
342 | pty = tty = -1; |
|
|
343 | name = 0; |
|
|
344 | } |
|
|
345 | |
|
|
346 | bool |
|
|
347 | ptytty_unix::get () |
|
|
348 | { |
|
|
349 | /* get master (pty) */ |
|
|
350 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
351 | return false; |
|
|
352 | |
|
|
353 | fcntl (pty, F_SETFL, O_NONBLOCK); |
|
|
354 | |
|
|
355 | /* get slave (tty) */ |
|
|
356 | if (tty < 0) |
|
|
357 | { |
|
|
358 | #ifndef NO_SETOWNER_TTYDEV |
|
|
359 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
360 | chmod (name, ttyconf.mode); |
|
|
361 | # ifdef HAVE_REVOKE |
|
|
362 | revoke (name); |
|
|
363 | # endif |
|
|
364 | #endif |
|
|
365 | |
|
|
366 | if ((tty = get_tty (name)) < 0) |
|
|
367 | { |
|
|
368 | put (); |
|
|
369 | return false; |
|
|
370 | } |
|
|
371 | } |
|
|
372 | |
|
|
373 | return true; |
|
|
374 | } |
|
|
375 | |
|
|
376 | #if PTYTTY_HELPER |
|
|
377 | |
|
|
378 | static int sock_fd; |
|
|
379 | static int pid; |
|
|
380 | |
|
|
381 | struct command |
|
|
382 | { |
|
|
383 | enum { get, login, destroy } type; |
|
|
384 | |
|
|
385 | ptytty *id; |
|
|
386 | |
|
|
387 | bool login_shell; |
|
|
388 | int cmd_pid; |
|
|
389 | char hostname[512]; // arbitrary, but should be plenty |
|
|
390 | }; |
|
|
391 | |
|
|
392 | struct ptytty_proxy : ptytty |
|
|
393 | { |
|
|
394 | ptytty *id; |
|
|
395 | |
|
|
396 | ptytty_proxy () |
|
|
397 | : id(0) |
|
|
398 | { |
|
|
399 | } |
|
|
400 | |
|
|
401 | ~ptytty_proxy (); |
|
|
402 | |
|
|
403 | bool get (); |
|
|
404 | void login (int cmd_pid, bool login_shell, const char *hostname); |
|
|
405 | }; |
|
|
406 | |
|
|
407 | bool |
|
|
408 | ptytty_proxy::get () |
|
|
409 | { |
|
|
410 | command cmd; |
|
|
411 | |
|
|
412 | cmd.type = command::get; |
|
|
413 | |
|
|
414 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
415 | |
|
|
416 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
|
|
417 | fatal ("protocol error while creating pty using helper process, aborting.\n"); |
|
|
418 | |
|
|
419 | if (!id) |
|
|
420 | return false; |
|
|
421 | |
|
|
422 | if ((pty = ptytty_recv_fd (sock_fd)) < 0 |
|
|
423 | || (tty = ptytty_recv_fd (sock_fd)) < 0) |
|
|
424 | fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
|
|
425 | |
|
|
426 | return true; |
|
|
427 | } |
|
|
428 | |
|
|
429 | void |
|
|
430 | ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
|
|
431 | { |
|
|
432 | command cmd; |
|
|
433 | |
|
|
434 | cmd.type = command::login; |
|
|
435 | cmd.id = id; |
|
|
436 | cmd.cmd_pid = cmd_pid; |
|
|
437 | cmd.login_shell = login_shell; |
|
|
438 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
|
|
439 | |
|
|
440 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
441 | } |
|
|
442 | |
|
|
443 | ptytty_proxy::~ptytty_proxy () |
|
|
444 | { |
|
|
445 | if (id) |
|
|
446 | { |
|
|
447 | command cmd; |
|
|
448 | |
|
|
449 | cmd.type = command::destroy; |
|
|
450 | cmd.id = id; |
|
|
451 | |
|
|
452 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
453 | } |
|
|
454 | } |
|
|
455 | |
|
|
456 | static |
|
|
457 | void serve () |
|
|
458 | { |
|
|
459 | command cmd; |
|
|
460 | vector<ptytty *> ptys; |
|
|
461 | |
|
|
462 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
|
|
463 | { |
|
|
464 | if (cmd.type == command::get) |
|
|
465 | { |
|
|
466 | // -> id ptyfd ttyfd |
|
|
467 | cmd.id = new ptytty_unix; |
|
|
468 | |
|
|
469 | if (cmd.id->get ()) |
|
|
470 | { |
|
|
471 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
472 | ptys.push_back (cmd.id); |
|
|
473 | |
|
|
474 | ptytty_send_fd (sock_fd, cmd.id->pty); |
|
|
475 | ptytty_send_fd (sock_fd, cmd.id->tty); |
|
|
476 | } |
|
|
477 | else |
|
|
478 | { |
|
|
479 | delete cmd.id; |
|
|
480 | cmd.id = 0; |
|
|
481 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
482 | } |
|
|
483 | } |
|
|
484 | else if (cmd.type == command::login) |
|
|
485 | { |
|
|
486 | #if UTMP_SUPPORT |
|
|
487 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
|
|
488 | { |
|
|
489 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
|
|
490 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
|
|
491 | } |
|
|
492 | #endif |
|
|
493 | } |
|
|
494 | else if (cmd.type == command::destroy) |
|
|
495 | { |
|
|
496 | ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
|
|
497 | |
|
|
498 | if (pty) |
|
|
499 | { |
|
|
500 | delete *pty; |
|
|
501 | ptys.erase (pty); |
|
|
502 | } |
|
|
503 | } |
|
|
504 | else |
|
|
505 | break; |
|
|
506 | } |
|
|
507 | |
|
|
508 | // destroy all ptys |
|
|
509 | for (ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
|
|
510 | delete *i; |
|
|
511 | } |
|
|
512 | |
|
|
513 | void ptytty_server () |
|
|
514 | { |
|
|
515 | int sv[2]; |
|
|
516 | |
|
|
517 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
|
|
518 | fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
|
|
519 | |
|
|
520 | pid = fork (); |
|
|
521 | |
|
|
522 | if (pid < 0) |
|
|
523 | fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
|
|
524 | |
|
|
525 | if (pid) |
|
|
526 | { |
|
|
527 | // client, process |
|
|
528 | sock_fd = sv[0]; |
|
|
529 | close (sv[1]); |
|
|
530 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
|
|
531 | } |
|
|
532 | else |
|
|
533 | { |
|
|
534 | // server, pty-helper |
|
|
535 | sock_fd = sv[1]; |
|
|
536 | |
|
|
537 | for (int fd = 0; fd < 1023; fd++) |
|
|
538 | if (fd != sock_fd) |
|
|
539 | close (fd); |
|
|
540 | |
|
|
541 | serve (); |
|
|
542 | _exit (EXIT_SUCCESS); |
|
|
543 | } |
|
|
544 | } |
|
|
545 | |
|
|
546 | #endif |
|
|
547 | |
|
|
548 | // a "factory" *g* |
|
|
549 | ptytty * |
|
|
550 | new_ptytty () |
|
|
551 | { |
|
|
552 | #if PTYTTY_HELPER |
|
|
553 | if (pid > 0) |
|
|
554 | // use helper process |
|
|
555 | return new ptytty_proxy; |
|
|
556 | else |
|
|
557 | #endif |
|
|
558 | return new ptytty_unix; |
|
|
559 | } |
|
|
560 | |
322 | /*----------------------- end-of-file (C source) -----------------------*/ |
561 | /*----------------------- end-of-file (C source) -----------------------*/ |
|
|
562 | |