[gssapi-openssh.git] / openssh / openbsd-compat / bsd-openpty.c

/*
 * Please note: this implementation of openpty() is far from complete.
 * it is just enough for portable OpenSSH's needs.
 */

/*
 * Copyright (c) 2004 Damien Miller <djm@mindrot.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Author: Tatu Ylonen <ylo@cs.hut.fi>
 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
 *                    All rights reserved
 * Allocating a pseudo-terminal, and making it the controlling tty.
 *
 * As far as I am concerned, the code I have written for this software
 * can be used freely for any purpose.  Any derived versions of this
 * software must be clearly marked as such, and if the derived work is
 * incompatible with the protocol description in the RFC file, it must be
 * called by a name other than "ssh" or "Secure Shell".
 */

#include "includes.h"
#if !defined(HAVE_OPENPTY)

#ifdef HAVE_UTIL_H
# include <util.h>
#endif /* HAVE_UTIL_H */

#ifdef HAVE_PTY_H
# include <pty.h>
#endif
#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
# include <sys/stropts.h>
#endif

#ifndef O_NOCTTY
#define O_NOCTTY 0
#endif

int
openpty(int *amaster, int *aslave, char *name, struct termios *termp,
   struct winsize *winp)
{
#if defined(HAVE__GETPTY)
	/*
	 * _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
	 * pty's automagically when needed
	 */
	char *slave;

	if ((slave = _getpty(amaster, O_RDWR, 0622, 0)) == NULL)
		return (-1);

	/* Open the slave side. */
	if ((*aslave = open(slave, O_RDWR | O_NOCTTY)) == -1) {
		close(*amaster);
		return (-1);
	}
	return (0);

#elif defined(HAVE_DEV_PTMX)
	/*
	 * This code is used e.g. on Solaris 2.x.  (Note that Solaris 2.3
	 * also has bsd-style ptys, but they simply do not work.)
	 */
	int ptm;
	char *pts;
	mysig_t old_signal;

	if ((ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY)) == -1)
		return (-1);

	/* XXX: need to close ptm on error? */
	old_signal = signal(SIGCHLD, SIG_DFL);
	if (grantpt(ptm) < 0)
		return (-1);
	signal(SIGCHLD, old_signal);

	if (unlockpt(ptm) < 0)
		return (-1);

	if ((pts = ptsname(ptm)) == NULL)
		return (-1);
	*amaster = ptm;

	/* Open the slave side. */
	if ((*aslave = open(pts, O_RDWR | O_NOCTTY)) == -1) {
		close(*amaster);
		return (-1);
	}

#ifndef HAVE_CYGWIN
	/*
	 * Try to push the appropriate streams modules, as described 
	 * in Solaris pts(7).
	 */
	ioctl(*aslave, I_PUSH, "ptem");
	ioctl(*aslave, I_PUSH, "ldterm");
# ifndef __hpux
	ioctl(*aslave, I_PUSH, "ttcompat");
# endif /* __hpux */
#endif /* HAVE_CYGWIN */

	return (0);

#elif defined(HAVE_DEV_PTS_AND_PTC)
	/* AIX-style pty code. */
	const char *ttname;

	if ((*amaster = open("/dev/ptc", O_RDWR | O_NOCTTY)) == -1)
		return (-1);
	if ((ttname = ttyname(*amaster)) == NULL)
		return (-1);
	if ((*aslave = open(ttname, O_RDWR | O_NOCTTY)) == -1) {
		close(*amaster);
		return (-1);
	}
	return (0);

#elif defined(_UNICOS)
	char ptbuf[64], ttbuf[64];
	int i;
	int highpty;

	highpty = 128;
#ifdef _SC_CRAY_NPTY
	if ((highpty = sysconf(_SC_CRAY_NPTY)) == -1)
		highpty = 128;
#endif /* _SC_CRAY_NPTY */

	for (i = 0; i < highpty; i++) {
		snprintf(ptbuf, sizeof(ptbuf), "/dev/pty/%03d", i);
		snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%03d", i);
		if ((*amaster = open(ptbuf, O_RDWR|O_NOCTTY)) == -1)
			continue;
		/* Open the slave side. */
		if ((*aslave = open(ttbuf, O_RDWR|O_NOCTTY)) == -1) {
			close(*amaster);
			return (-1);
		}
		return (0);
	}
	return (-1);

#else
	/* BSD-style pty code. */
	char ptbuf[64], ttbuf[64];
	int i;
	const char *ptymajors = "pqrstuvwxyzabcdefghijklmno"
	    "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
	const char *ptyminors = "0123456789abcdef";
	int num_minors = strlen(ptyminors);
	int num_ptys = strlen(ptymajors) * num_minors;
	struct termios tio;

	for (i = 0; i < num_ptys; i++) {
		snprintf(ptbuf, sizeof(ptbuf), "/dev/pty%c%c", 
		    ptymajors[i / num_minors], ptyminors[i % num_minors]);
		snprintf(ttbuf, sizeof(ttbuf), "/dev/tty%c%c",
		    ptymajors[i / num_minors], ptyminors[i % num_minors]);

		if ((*amaster = open(ptbuf, O_RDWR | O_NOCTTY)) == -1) {
			/* Try SCO style naming */
			snprintf(ptbuf, sizeof(ptbuf), "/dev/ptyp%d", i);
			snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%d", i);
			if ((*amaster = open(ptbuf, O_RDWR | O_NOCTTY)) == -1)
				continue;
		}

		/* Open the slave side. */
		if ((*aslave = open(ttbuf, O_RDWR | O_NOCTTY)) == -1) {
			close(*amaster);
			return (-1);
		}
		/* set tty modes to a sane state for broken clients */
		if (tcgetattr(*amaster, &tio) != -1) {
			tio.c_lflag |= (ECHO | ISIG | ICANON);
			tio.c_oflag |= (OPOST | ONLCR);
			tio.c_iflag |= ICRNL;
			tcsetattr(*amaster, TCSANOW, &tio);
		}

		return (0);
	}
	return (-1);
#endif
}

#endif /* !defined(HAVE_OPENPTY) */
Commit	Line	Data
cdd66111	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	/*
	7	* Copyright (c) 2004 Damien Miller <djm@mindrot.org>
	8	*
	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.
	12	*
	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.
	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
	38	#ifdef HAVE_UTIL_H
	39	# include <util.h>
	40	#endif /* HAVE_UTIL_H */
	41
	42	#ifdef HAVE_PTY_H
	43	# include <pty.h>
	44	#endif
	45	#if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H)
	46	# include <sys/stropts.h>
	47	#endif
	48
	49	#ifndef O_NOCTTY
	50	#define O_NOCTTY 0
	51	#endif
	52
	53	int
	54	openpty(int amaster, int aslave, char name, struct termios termp,
	55	struct winsize *winp)
	56	{
	57	#if defined(HAVE__GETPTY)
	58	/*
	59	* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
	60	* pty's automagically when needed
	61	*/
	62	char *slave;
	63
	64	if ((slave = _getpty(amaster, O_RDWR, 0622, 0)) == NULL)
65	return (-1);
66
67	/* Open the slave side. */
68	if ((*aslave = open(slave, O_RDWR \| O_NOCTTY)) == -1) {
69	close(*amaster);
70	return (-1);
71	}
72	return (0);
73
74	#elif defined(HAVE_DEV_PTMX)
75	/*
76	* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3
77	* also has bsd-style ptys, but they simply do not work.)
78	*/
79	int ptm;
80	char *pts;
81	mysig_t old_signal;
82
83	if ((ptm = open("/dev/ptmx", O_RDWR \| O_NOCTTY)) == -1)
84	return (-1);
85
86	/* XXX: need to close ptm on error? */
87	old_signal = signal(SIGCHLD, SIG_DFL);
88	if (grantpt(ptm) < 0)
89	return (-1);
90	signal(SIGCHLD, old_signal);
91
92	if (unlockpt(ptm) < 0)
93	return (-1);
94
95	if ((pts = ptsname(ptm)) == NULL)
96	return (-1);
97	*amaster = ptm;
98
99	/* Open the slave side. */
100	if ((*aslave = open(pts, O_RDWR \| O_NOCTTY)) == -1) {
101	close(*amaster);
102	return (-1);
103	}
104
105	#ifndef HAVE_CYGWIN
106	/*
107	* Try to push the appropriate streams modules, as described
108	* in Solaris pts(7).
109	*/
110	ioctl(*aslave, I_PUSH, "ptem");
111	ioctl(*aslave, I_PUSH, "ldterm");
112	# ifndef __hpux
113	ioctl(*aslave, I_PUSH, "ttcompat");
114	# endif /* __hpux */
115	#endif /* HAVE_CYGWIN */
116
117	return (0);
118
119	#elif defined(HAVE_DEV_PTS_AND_PTC)
120	/* AIX-style pty code. */
121	const char *ttname;
122
123	if ((*amaster = open("/dev/ptc", O_RDWR \| O_NOCTTY)) == -1)
124	return (-1);
125	if ((ttname = ttyname(*amaster)) == NULL)
126	return (-1);
127	if ((*aslave = open(ttname, O_RDWR \| O_NOCTTY)) == -1) {
128	close(*amaster);
129	return (-1);
130	}
131	return (0);
132
133	#elif defined(_UNICOS)
134	char ptbuf[64], ttbuf[64];
135	int i;
136	int highpty;
137
138	highpty = 128;
139	#ifdef _SC_CRAY_NPTY
140	if ((highpty = sysconf(_SC_CRAY_NPTY)) == -1)
141	highpty = 128;
142	#endif /* _SC_CRAY_NPTY */
143
144	for (i = 0; i < highpty; i++) {
145	snprintf(ptbuf, sizeof(ptbuf), "/dev/pty/%03d", i);
146	snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%03d", i);
147	if ((*amaster = open(ptbuf, O_RDWR\|O_NOCTTY)) == -1)
148	continue;
149	/* Open the slave side. */
150	if ((*aslave = open(ttbuf, O_RDWR\|O_NOCTTY)) == -1) {
151	close(*amaster);
152	return (-1);
153	}
154	return (0);
155	}
156	return (-1);
157
158	#else
159	/* BSD-style pty code. */
160	char ptbuf[64], ttbuf[64];
161	int i;
162	const char *ptymajors = "pqrstuvwxyzabcdefghijklmno"
163	"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
164	const char *ptyminors = "0123456789abcdef";
165	int num_minors = strlen(ptyminors);
166	int num_ptys = strlen(ptymajors) * num_minors;
167	struct termios tio;
168
169	for (i = 0; i < num_ptys; i++) {
170	snprintf(ptbuf, sizeof(ptbuf), "/dev/pty%c%c",
171	ptymajors[i / num_minors], ptyminors[i % num_minors]);
172	snprintf(ttbuf, sizeof(ttbuf), "/dev/tty%c%c",
173	ptymajors[i / num_minors], ptyminors[i % num_minors]);
174
175	if ((*amaster = open(ptbuf, O_RDWR \| O_NOCTTY)) == -1) {
176	/* Try SCO style naming */
177	snprintf(ptbuf, sizeof(ptbuf), "/dev/ptyp%d", i);
178	snprintf(ttbuf, sizeof(ttbuf), "/dev/ttyp%d", i);
179	if ((*amaster = open(ptbuf, O_RDWR \| O_NOCTTY)) == -1)
180	continue;
181	}
182
183	/* Open the slave side. */
184	if ((*aslave = open(ttbuf, O_RDWR \| O_NOCTTY)) == -1) {
185	close(*amaster);
186	return (-1);
187	}
188	/* set tty modes to a sane state for broken clients */
189	if (tcgetattr(*amaster, &tio) != -1) {
190	tio.c_lflag \|= (ECHO \| ISIG \| ICANON);
191	tio.c_oflag \|= (OPOST \| ONLCR);
192	tio.c_iflag \|= ICRNL;
193	tcsetattr(*amaster, TCSANOW, &tio);
194	}
195
196	return (0);
197	}
198	return (-1);
199	#endif
200	}
201
202	#endif /* !defined(HAVE_OPENPTY) */
203