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