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Commit | Line | Data |
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a4de1163 | 1 | /* |
2 | * Please note: this implementation of openpty() is far from complete. | |
3 | * it is just enough for portable OpenSSH's needs. | |
4 | */ | |
5 | ||
6 | /* | |
9cd11896 | 7 | * Copyright (c) 2004 Damien Miller <djm@mindrot.org> |
a4de1163 | 8 | * |
9cd11896 | 9 | * Permission to use, copy, modify, and distribute this software for any |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies. | |
a4de1163 | 12 | * |
9cd11896 | 13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
a4de1163 | 20 | */ |
21 | ||
22 | /* | |
23 | * Author: Tatu Ylonen <ylo@cs.hut.fi> | |
24 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
25 | * All rights reserved | |
26 | * Allocating a pseudo-terminal, and making it the controlling tty. | |
27 | * | |
28 | * As far as I am concerned, the code I have written for this software | |
29 | * can be used freely for any purpose. Any derived versions of this | |
30 | * software must be clearly marked as such, and if the derived work is | |
31 | * incompatible with the protocol description in the RFC file, it must be | |
32 | * called by a name other than "ssh" or "Secure Shell". | |
33 | */ | |
34 | ||
35 | #include "includes.h" | |
36 | #if !defined(HAVE_OPENPTY) | |
37 | ||
37259a8e | 38 | #include <sys/types.h> |
39 | ||
442a6515 | 40 | #include <stdlib.h> |
41 | ||
37259a8e | 42 | #ifdef HAVE_SYS_STAT_H |
43 | # include <sys/stat.h> | |
44 | #endif | |
6beea87c | 45 | #ifdef HAVE_SYS_IOCTL_H |
46 | # include <sys/ioctl.h> | |
47 | #endif | |
37259a8e | 48 | |
49 | #ifdef HAVE_FCNTL_H | |
50 | # include <fcntl.h> | |
51 | #endif | |
52 | ||
a4de1163 | 53 | #ifdef HAVE_UTIL_H |
54 | # include <util.h> | |
55 | #endif /* HAVE_UTIL_H */ | |
56 | ||
57 | #ifdef HAVE_PTY_H | |
58 | # include <pty.h> | |
59 | #endif | |
60 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) | |
61 | # include <sys/stropts.h> | |
62 | #endif | |
63 | ||
b5b88c19 | 64 | #include <signal.h> |
e204f3ee | 65 | #include <string.h> |
66 | #include <unistd.h> | |
b5b88c19 | 67 | |
a4de1163 | 68 | #ifndef O_NOCTTY |
69 | #define O_NOCTTY 0 | |
70 | #endif | |
71 | ||
72 | int | |
73 | openpty(int *amaster, int *aslave, char *name, struct termios *termp, | |
74 | struct winsize *winp) | |
75 | { | |
76 | #if defined(HAVE__GETPTY) | |
77 | /* | |
78 | * _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more | |
79 | * pty's automagically when needed | |
80 | */ | |
81 | char *slave; | |
82 | ||
83 | if ((slave = _getpty(amaster, O_RDWR, 0622, 0)) == NULL) | |
84 | return (-1); | |
85 | ||
86 | /* Open the slave side. */ | |
87 | if ((*aslave = open(slave, O_RDWR | O_NOCTTY)) == -1) { | |
88 | close(*amaster); | |
89 | return (-1); | |
90 | } | |
91 | return (0); | |
92 | ||
93 | #elif defined(HAVE_DEV_PTMX) | |
94 | /* | |
95 | * This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3 | |
96 | * also has bsd-style ptys, but they simply do not work.) | |
97 | */ | |
98 | int ptm; | |
99 | char *pts; | |
100 | mysig_t old_signal; | |
101 | ||
102 | if ((ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY)) == -1) | |
103 | return (-1); | |
104 | ||
105 | /* XXX: need to close ptm on error? */ | |
106 | old_signal = signal(SIGCHLD, SIG_DFL); | |
107 | if (grantpt(ptm) < 0) | |
108 | return (-1); | |
109 | signal(SIGCHLD, old_signal); | |
110 | ||
111 | if (unlockpt(ptm) < 0) | |
112 | return (-1); | |
113 | ||
114 | if ((pts = ptsname(ptm)) == NULL) | |
115 | return (-1); | |
116 | *amaster = ptm; | |
117 | ||
118 | /* Open the slave side. */ | |
119 | if ((*aslave = open(pts, O_RDWR | O_NOCTTY)) == -1) { | |
120 | close(*amaster); | |
121 | return (-1); | |
122 | } | |
123 | ||
a4de1163 | 124 | /* |
125 | * Try to push the appropriate streams modules, as described | |
126 | * in Solaris pts(7). | |
127 | */ | |
128 | ioctl(*aslave, I_PUSH, "ptem"); | |
129 | ioctl(*aslave, I_PUSH, "ldterm"); | |
130 | # ifndef __hpux | |
131 | ioctl(*aslave, I_PUSH, "ttcompat"); | |
132 | # endif /* __hpux */ | |
a4de1163 | 133 | |
134 | return (0); | |
135 | ||
136 | #elif defined(HAVE_DEV_PTS_AND_PTC) | |
137 | /* AIX-style pty code. */ | |
138 | const char *ttname; | |
139 | ||
140 | if ((*amaster = open("/dev/ptc", O_RDWR | O_NOCTTY)) == -1) | |
141 | return (-1); | |
142 | if ((ttname = ttyname(*amaster)) == NULL) | |
143 | return (-1); | |
144 | if ((*aslave = open(ttname, O_RDWR | O_NOCTTY)) == -1) { | |
145 | close(*amaster); | |
146 | return (-1); | |
147 | } | |
148 | return (0); | |
149 | ||
150 | #elif defined(_UNICOS) | |
151 | char ptbuf[64], ttbuf[64]; | |
152 | int i; | |
153 | int highpty; | |
154 | ||
155 | highpty = 128; | |
156 | #ifdef _SC_CRAY_NPTY | |
157 | if ((highpty = sysconf(_SC_CRAY_NPTY)) == -1) | |
158 | highpty = 128; | |
159 | #endif /* _SC_CRAY_NPTY */ | |
160 | ||
161 | for (i = 0; i < highpty; i++) { | |
162 | snprintf(ptbuf, sizeof(ptbuf), "/dev/pty/%03d", i); | |
6e9f4c0f | 163 | snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%03d", i); |
a4de1163 | 164 | if ((*amaster = open(ptbuf, O_RDWR|O_NOCTTY)) == -1) |
165 | continue; | |
166 | /* Open the slave side. */ | |
167 | if ((*aslave = open(ttbuf, O_RDWR|O_NOCTTY)) == -1) { | |
168 | close(*amaster); | |
169 | return (-1); | |
170 | } | |
171 | return (0); | |
172 | } | |
173 | return (-1); | |
174 | ||
175 | #else | |
176 | /* BSD-style pty code. */ | |
177 | char ptbuf[64], ttbuf[64]; | |
178 | int i; | |
179 | const char *ptymajors = "pqrstuvwxyzabcdefghijklmno" | |
180 | "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; | |
181 | const char *ptyminors = "0123456789abcdef"; | |
182 | int num_minors = strlen(ptyminors); | |
183 | int num_ptys = strlen(ptymajors) * num_minors; | |
184 | struct termios tio; | |
185 | ||
186 | for (i = 0; i < num_ptys; i++) { | |
187 | snprintf(ptbuf, sizeof(ptbuf), "/dev/pty%c%c", | |
188 | ptymajors[i / num_minors], ptyminors[i % num_minors]); | |
189 | snprintf(ttbuf, sizeof(ttbuf), "/dev/tty%c%c", | |
190 | ptymajors[i / num_minors], ptyminors[i % num_minors]); | |
191 | ||
192 | if ((*amaster = open(ptbuf, O_RDWR | O_NOCTTY)) == -1) { | |
193 | /* Try SCO style naming */ | |
194 | snprintf(ptbuf, sizeof(ptbuf), "/dev/ptyp%d", i); | |
195 | snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%d", i); | |
196 | if ((*amaster = open(ptbuf, O_RDWR | O_NOCTTY)) == -1) | |
197 | continue; | |
198 | } | |
199 | ||
200 | /* Open the slave side. */ | |
201 | if ((*aslave = open(ttbuf, O_RDWR | O_NOCTTY)) == -1) { | |
202 | close(*amaster); | |
203 | return (-1); | |
204 | } | |
205 | /* set tty modes to a sane state for broken clients */ | |
206 | if (tcgetattr(*amaster, &tio) != -1) { | |
207 | tio.c_lflag |= (ECHO | ISIG | ICANON); | |
208 | tio.c_oflag |= (OPOST | ONLCR); | |
209 | tio.c_iflag |= ICRNL; | |
210 | tcsetattr(*amaster, TCSANOW, &tio); | |
211 | } | |
212 | ||
213 | return (0); | |
214 | } | |
215 | return (-1); | |
216 | #endif | |
217 | } | |
218 | ||
219 | #endif /* !defined(HAVE_OPENPTY) */ | |
220 |