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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/cu/cu.c	Lines:	0	205	0.0 %
Date:	2016-12-06	Branches:	0	156	0.0 %


/* $OpenBSD: cu.c,v 1.24 2015/10/16 07:01:53 deraadt Exp $ */

/*
 * Copyright (c) 2012 Nicholas Marriott <nicm@openbsd.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 MIND, 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.
 */

#include <sys/ioctl.h>

#include <ctype.h>
#include <err.h>
#include <event.h>
#include <fcntl.h>
#include <getopt.h>
#include <paths.h>
#include <pwd.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include <limits.h>

#include "cu.h"

extern char		*__progname;

FILE			*record_file;
struct termios		 saved_tio;
struct bufferevent	*input_ev;
struct bufferevent	*output_ev;
int			 is_direct = -1;
const char		*line_path = NULL;
int			 line_speed = -1;
int			 line_fd;
struct termios		 line_tio;
struct bufferevent	*line_ev;
struct event		 sigterm_ev;
struct event		 sighup_ev;
enum {
	STATE_NONE,
	STATE_NEWLINE,
	STATE_TILDE
} last_state = STATE_NEWLINE;

__dead void	usage(void);
void		signal_event(int, short, void *);
void		stream_read(struct bufferevent *, void *);
void		stream_error(struct bufferevent *, short, void *);
void		line_read(struct bufferevent *, void *);
void		line_error(struct bufferevent *, short, void *);
void		try_remote(const char *, const char *, const char *);

__dead void
usage(void)
{
	fprintf(stderr, "usage: %s [-d] [-l line] [-s speed | -speed]\n",
	    __progname);
	fprintf(stderr, "       %s [host]\n", __progname);
	exit(1);
}

int
main(int argc, char **argv)
{
	const char	*errstr;
	char		*tmp, *s, *host;
	int		 opt, i, flags;

	if (pledge("stdio rpath wpath cpath getpw proc exec tty",
	    NULL) == -1)
		err(1, "pledge");

	if (isatty(STDIN_FILENO) && tcgetattr(STDIN_FILENO, &saved_tio) != 0)
		err(1, "tcgetattr");

	/*
	 * Convert obsolescent -### speed to modern -s### syntax which getopt()
	 * can handle.
	 */
	for (i = 1; i < argc; i++) {
		if (strcmp("--", argv[i]) == 0)
			break;
		if (argv[i][0] != '-' || !isdigit((unsigned char)argv[i][1]))
			continue;

		if (asprintf(&argv[i], "-s%s", &argv[i][1]) == -1)
			errx(1, "speed asprintf");
	}

	while ((opt = getopt(argc, argv, "dl:s:")) != -1) {
		switch (opt) {
		case 'd':
			is_direct = 1;
			break;
		case 'l':
			line_path = optarg;
			break;
		case 's':
			line_speed = strtonum(optarg, 0, INT_MAX, &errstr);
			if (errstr != NULL)
				errx(1, "speed is %s: %s", errstr, optarg);
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;
	if (argc != 0 && argc != 1)
		usage();

	if (line_path != NULL || line_speed != -1 || is_direct != -1) {
		if (argc != 0)
			usage();
	} else {
		if (argc == 1)
			host = argv[0];
		else
			host = getenv("HOST");
		if (host != NULL && *host != '\0') {
			if (*host == '/')
				line_path = host;
			else {
				s = getenv("REMOTE");
				if (s != NULL && *s == '/')
					try_remote(host, s, NULL);
				else
					try_remote(host, NULL, s);
			}
		}
	}

	if (line_path == NULL)
		line_path = "/dev/cua00";
	if (line_speed == -1)
		line_speed = 9600;
	if (is_direct == -1)
		is_direct = 0;

	if (strchr(line_path, '/') == NULL) {
		if (asprintf(&tmp, "%s%s", _PATH_DEV, line_path) == -1)
			err(1, "asprintf");
		line_path = tmp;
	}

	flags = O_RDWR;
	if (is_direct)
		flags |= O_NONBLOCK;
	line_fd = open(line_path, flags);
	if (line_fd < 0)
		err(1, "open(\"%s\")", line_path);
	if (ioctl(line_fd, TIOCEXCL) != 0)
		err(1, "ioctl(TIOCEXCL)");
	if (tcgetattr(line_fd, &line_tio) != 0)
		err(1, "tcgetattr");
	if (set_line(line_speed) != 0)
		err(1, "tcsetattr");

	event_init();

	signal_set(&sigterm_ev, SIGTERM, signal_event, NULL);
	signal_add(&sigterm_ev, NULL);
	signal_set(&sighup_ev, SIGHUP, signal_event, NULL);
	signal_add(&sighup_ev, NULL);
	if (signal(SIGINT, SIG_IGN) == SIG_ERR)
		err(1, "signal");
	if (signal(SIGQUIT, SIG_IGN) == SIG_ERR)
		err(1, "signal");

	set_termios(); /* after this use cu_err and friends */

	/* stdin and stdout get separate events */
	input_ev = bufferevent_new(STDIN_FILENO, stream_read, NULL,
	    stream_error, NULL);
	bufferevent_enable(input_ev, EV_READ);
	output_ev = bufferevent_new(STDOUT_FILENO, NULL, NULL, stream_error,
	    NULL);
	bufferevent_enable(output_ev, EV_WRITE);

	set_blocking(line_fd, 0);
	line_ev = bufferevent_new(line_fd, line_read, NULL, line_error,
	    NULL);
	bufferevent_enable(line_ev, EV_READ|EV_WRITE);

	printf("Connected to %s (speed %d)\r\n", line_path, line_speed);
	event_dispatch();

	restore_termios();
	printf("\r\n[EOT]\n");

	exit(0);
}

void
signal_event(int fd, short events, void *data)
{
	restore_termios();
	printf("\r\n[SIG%s]\n", sys_signame[fd]);

	exit(0);
}

void
set_blocking(int fd, int state)
{
	int mode;

	state = state ? 0 : O_NONBLOCK;
	if ((mode = fcntl(fd, F_GETFL)) == -1)
		cu_err(1, "fcntl");
	if ((mode & O_NONBLOCK) != state) {
		mode = (mode & ~O_NONBLOCK) | state;
		if (fcntl(fd, F_SETFL, mode) == -1)
			cu_err(1, "fcntl");
	}
}

void
set_termios(void)
{
	struct termios tio;

	if (!isatty(STDIN_FILENO))
		return;

	memcpy(&tio, &saved_tio, sizeof(tio));
	tio.c_lflag &= ~(ICANON|IEXTEN|ECHO);
	tio.c_iflag &= ~(INPCK|ICRNL);
	tio.c_oflag &= ~OPOST;
	tio.c_cc[VMIN] = 1;
	tio.c_cc[VTIME] = 0;
	tio.c_cc[VDISCARD] = _POSIX_VDISABLE;
	tio.c_cc[VDSUSP] = _POSIX_VDISABLE;
	tio.c_cc[VINTR] = _POSIX_VDISABLE;
	tio.c_cc[VLNEXT] = _POSIX_VDISABLE;
	tio.c_cc[VQUIT] = _POSIX_VDISABLE;
	tio.c_cc[VSUSP] = _POSIX_VDISABLE;
	if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio) != 0)
		cu_err(1, "tcsetattr");
}

void
restore_termios(void)
{
	if (isatty(STDIN_FILENO))
		tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_tio);
}

int
set_line(int speed)
{
	struct termios	 tio;

	memcpy(&tio, &line_tio, sizeof(tio));
	tio.c_iflag &= ~(ISTRIP|ICRNL);
	tio.c_oflag &= ~OPOST;
	tio.c_lflag &= ~(ICANON|ISIG|IEXTEN|ECHO);
	tio.c_cflag &= ~(CSIZE|PARENB);
	tio.c_cflag |= CREAD|CS8|CLOCAL;
	tio.c_cc[VMIN] = 1;
	tio.c_cc[VTIME] = 0;
	cfsetspeed(&tio, speed);
	if (tcsetattr(line_fd, TCSAFLUSH, &tio) != 0)
		return (-1);
	return (0);
}

void
stream_read(struct bufferevent *bufev, void *data)
{
	char	*new_data, *ptr;
	size_t	 new_size;
	int	 state_change;

	new_data = EVBUFFER_DATA(input_ev->input);
	new_size = EVBUFFER_LENGTH(input_ev->input);
	if (new_size == 0)
		return;

	state_change = isatty(STDIN_FILENO);
	for (ptr = new_data; ptr < new_data + new_size; ptr++) {
		switch (last_state) {
		case STATE_NONE:
			if (state_change && *ptr == '\r')
				last_state = STATE_NEWLINE;
			break;
		case STATE_NEWLINE:
			if (state_change && *ptr == '~') {
				last_state = STATE_TILDE;
				continue;
			}
			if (*ptr != '\r')
				last_state = STATE_NONE;
			break;
		case STATE_TILDE:
			do_command(*ptr);
			last_state = STATE_NEWLINE;
			continue;
		}

		bufferevent_write(line_ev, ptr, 1);
	}

	evbuffer_drain(input_ev->input, new_size);
}

void
stream_error(struct bufferevent *bufev, short what, void *data)
{
	event_loopexit(NULL);
}

void
line_read(struct bufferevent *bufev, void *data)
{
	char	*new_data;
	size_t	 new_size;

	new_data = EVBUFFER_DATA(line_ev->input);
	new_size = EVBUFFER_LENGTH(line_ev->input);
	if (new_size == 0)
		return;

	if (record_file != NULL)
		fwrite(new_data, 1, new_size, record_file);
	bufferevent_write(output_ev, new_data, new_size);

	evbuffer_drain(line_ev->input, new_size);
}

void
line_error(struct bufferevent *bufev, short what, void *data)
{
	event_loopexit(NULL);
}

void
try_remote(const char *host, const char *path, const char *entry)
{
	const char	*paths[] = { "/etc/remote", NULL, NULL };
	char		*cp, *s;
	long		 l;
	int		 error;

	if (path != NULL) {
		paths[0] = path;
		paths[1] = "/etc/remote";
	}

	if (entry != NULL && cgetset(entry) != 0)
		cu_errx(1, "cgetset failed");
	error = cgetent(&cp, (char **)paths, (char *)host);
	if (error < 0) {
		switch (error) {
		case -1:
			cu_errx(1, "unknown host %s", host);
		case -2:
			cu_errx(1, "can't open remote file");
		case -3:
			cu_errx(1, "loop in remote file");
		default:
			cu_errx(1, "unknown error in remote file");
		}
	}

	if (is_direct == -1 && cgetcap(cp, "dc", ':') != NULL)
		is_direct = 1;

	if (line_path == NULL && cgetstr(cp, "dv", &s) >= 0)
		line_path = s;

	if (line_speed == -1 && cgetnum(cp, "br", &l) >= 0) {
		if (l < 0 || l > INT_MAX)
			cu_errx(1, "speed out of range");
		line_speed = l;
	}
}

/* Expands tildes in the file name. Based on code from ssh/misc.c. */
char *
tilde_expand(const char *filename1)
{
	const char	*filename, *path, *sep;
	char		 user[128], *out;
	struct passwd	*pw;
	u_int		 len, slash;
	int		 rv;

	if (*filename1 != '~')
		goto no_change;
	filename = filename1 + 1;

	path = strchr(filename, '/');
	if (path != NULL && path > filename) {		/* ~user/path */
		slash = path - filename;
		if (slash > sizeof(user) - 1)
			goto no_change;
		memcpy(user, filename, slash);
		user[slash] = '\0';
		if ((pw = getpwnam(user)) == NULL)
			goto no_change;
	} else if ((pw = getpwuid(getuid())) == NULL)	/* ~/path */
		goto no_change;

	/* Make sure directory has a trailing '/' */
	len = strlen(pw->pw_dir);
	if (len == 0 || pw->pw_dir[len - 1] != '/')
		sep = "/";
	else
		sep = "";

	/* Skip leading '/' from specified path */
	if (path != NULL)
		filename = path + 1;

	if ((rv = asprintf(&out, "%s%s%s", pw->pw_dir, sep, filename)) == -1)
		cu_err(1, "asprintf");
	if (rv >= PATH_MAX) {
		free(out);
		goto no_change;
	}

	return (out);

no_change:
	out = strdup(filename1);
	if (out == NULL)
		cu_err(1, "strdup");
	return (out);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cu.c,v 1.24 2015/10/16 07:01:53 deraadt Exp $ */
2
3			/*
4			* Copyright (c) 2012 Nicholas Marriott <nicm@openbsd.org>
5			*
6			* Permission to use, copy, modify, and distribute this software for any
7			* purpose with or without fee is hereby granted, provided that the above
8			* copyright notice and this permission notice appear in all copies.
9			*
10			* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11			* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12			* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13			* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14			* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15			* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16			* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17			*/
18
19			#include <sys/ioctl.h>
20
21			#include <ctype.h>
22			#include <err.h>
23			#include <event.h>
24			#include <fcntl.h>
25			#include <getopt.h>
26			#include <paths.h>
27			#include <pwd.h>
28			#include <signal.h>
29			#include <stdio.h>
30			#include <stdlib.h>
31			#include <string.h>
32			#include <termios.h>
33			#include <unistd.h>
34			#include <limits.h>
35
36			#include "cu.h"
37
38			extern char *__progname;
39
40			FILE *record_file;
41			struct termios saved_tio;
42			struct bufferevent *input_ev;
43			struct bufferevent *output_ev;
44			int is_direct = -1;
45			const char *line_path = NULL;
46			int line_speed = -1;
47			int line_fd;
48			struct termios line_tio;
49			struct bufferevent *line_ev;
50			struct event sigterm_ev;
51			struct event sighup_ev;
52			enum {
53			STATE_NONE,
54			STATE_NEWLINE,
55			STATE_TILDE
56			} last_state = STATE_NEWLINE;
57
58			__dead void usage(void);
59			void signal_event(int, short, void *);
60			void stream_read(struct bufferevent , void );
61			void stream_error(struct bufferevent , short, void );
62			void line_read(struct bufferevent , void );
63			void line_error(struct bufferevent , short, void );
64			void try_remote(const char , const char , const char *);
65
66			__dead void
67			usage(void)
68			{
69			fprintf(stderr, "usage: %s [-d] [-l line] [-s speed \| -speed]\n",
70			__progname);
71			fprintf(stderr, " %s [host]\n", __progname);
72			exit(1);
73			}
74
75			int
76			main(int argc, char **argv)
77			{
78			const char *errstr;
79			char tmp, s, *host;
80			int opt, i, flags;
81
82			if (pledge("stdio rpath wpath cpath getpw proc exec tty",
83			NULL) == -1)
84			err(1, "pledge");
85
86			if (isatty(STDIN_FILENO) && tcgetattr(STDIN_FILENO, &saved_tio) != 0)
87			err(1, "tcgetattr");
88
89			/*
90			* Convert obsolescent -### speed to modern -s### syntax which getopt()
91			* can handle.
92			*/
93			for (i = 1; i < argc; i++) {
94			if (strcmp("--", argv[i]) == 0)
95			break;
96			if (argv[i][0] != '-' \|\| !isdigit((unsigned char)argv[i][1]))
97			continue;
98
99			if (asprintf(&argv[i], "-s%s", &argv[i][1]) == -1)
100			errx(1, "speed asprintf");
101			}
102
103			while ((opt = getopt(argc, argv, "dl:s:")) != -1) {
104			switch (opt) {
105			case 'd':
106			is_direct = 1;
107			break;
108			case 'l':
109			line_path = optarg;
110			break;
111			case 's':
112			line_speed = strtonum(optarg, 0, INT_MAX, &errstr);
113			if (errstr != NULL)
114			errx(1, "speed is %s: %s", errstr, optarg);
115			break;
116			default:
117			usage();
118			}
119			}
120			argc -= optind;
121			argv += optind;
122			if (argc != 0 && argc != 1)
123			usage();
124
125			if (line_path != NULL \|\| line_speed != -1 \|\| is_direct != -1) {
126			if (argc != 0)
127			usage();
128			} else {
129			if (argc == 1)
130			host = argv[0];
131			else
132			host = getenv("HOST");
133			if (host != NULL && *host != '\0') {
134			if (*host == '/')
135			line_path = host;
136			else {
137			s = getenv("REMOTE");
138			if (s != NULL && *s == '/')
139			try_remote(host, s, NULL);
140			else
141			try_remote(host, NULL, s);
142			}
143			}
144			}
145
146			if (line_path == NULL)
147			line_path = "/dev/cua00";
148			if (line_speed == -1)
149			line_speed = 9600;
150			if (is_direct == -1)
151			is_direct = 0;
152
153			if (strchr(line_path, '/') == NULL) {
154			if (asprintf(&tmp, "%s%s", _PATH_DEV, line_path) == -1)
155			err(1, "asprintf");
156			line_path = tmp;
157			}
158
159			flags = O_RDWR;
160			if (is_direct)
161			flags \|= O_NONBLOCK;
162			line_fd = open(line_path, flags);
163			if (line_fd < 0)
164			err(1, "open(\"%s\")", line_path);
165			if (ioctl(line_fd, TIOCEXCL) != 0)
166			err(1, "ioctl(TIOCEXCL)");
167			if (tcgetattr(line_fd, &line_tio) != 0)
168			err(1, "tcgetattr");
169			if (set_line(line_speed) != 0)
170			err(1, "tcsetattr");
171
172			event_init();
173
174			signal_set(&sigterm_ev, SIGTERM, signal_event, NULL);
175			signal_add(&sigterm_ev, NULL);
176			signal_set(&sighup_ev, SIGHUP, signal_event, NULL);
177			signal_add(&sighup_ev, NULL);
178			if (signal(SIGINT, SIG_IGN) == SIG_ERR)
179			err(1, "signal");
180			if (signal(SIGQUIT, SIG_IGN) == SIG_ERR)
181			err(1, "signal");
182
183			set_termios(); /* after this use cu_err and friends */
184
185			/* stdin and stdout get separate events */
186			input_ev = bufferevent_new(STDIN_FILENO, stream_read, NULL,
187			stream_error, NULL);
188			bufferevent_enable(input_ev, EV_READ);
189			output_ev = bufferevent_new(STDOUT_FILENO, NULL, NULL, stream_error,
190			NULL);
191			bufferevent_enable(output_ev, EV_WRITE);
192
193			set_blocking(line_fd, 0);
194			line_ev = bufferevent_new(line_fd, line_read, NULL, line_error,
195			NULL);
196			bufferevent_enable(line_ev, EV_READ\|EV_WRITE);
197
198			printf("Connected to %s (speed %d)\r\n", line_path, line_speed);
199			event_dispatch();
200
201			restore_termios();
202			printf("\r\n[EOT]\n");
203
204			exit(0);
205			}
206
207			void
208			signal_event(int fd, short events, void *data)
209			{
210			restore_termios();
211			printf("\r\n[SIG%s]\n", sys_signame[fd]);
212
213			exit(0);
214			}
215
216			void
217			set_blocking(int fd, int state)
218			{
219			int mode;
220
221			state = state ? 0 : O_NONBLOCK;
222			if ((mode = fcntl(fd, F_GETFL)) == -1)
223			cu_err(1, "fcntl");
224			if ((mode & O_NONBLOCK) != state) {
225			mode = (mode & ~O_NONBLOCK) \| state;
226			if (fcntl(fd, F_SETFL, mode) == -1)
227			cu_err(1, "fcntl");
228			}
229			}
230
231			void
232			set_termios(void)
233			{
234			struct termios tio;
235
236			if (!isatty(STDIN_FILENO))
237			return;
238
239			memcpy(&tio, &saved_tio, sizeof(tio));
240			tio.c_lflag &= ~(ICANON\|IEXTEN\|ECHO);
241			tio.c_iflag &= ~(INPCK\|ICRNL);
242			tio.c_oflag &= ~OPOST;
243			tio.c_cc[VMIN] = 1;
244			tio.c_cc[VTIME] = 0;
245			tio.c_cc[VDISCARD] = _POSIX_VDISABLE;
246			tio.c_cc[VDSUSP] = _POSIX_VDISABLE;
247			tio.c_cc[VINTR] = _POSIX_VDISABLE;
248			tio.c_cc[VLNEXT] = _POSIX_VDISABLE;
249			tio.c_cc[VQUIT] = _POSIX_VDISABLE;
250			tio.c_cc[VSUSP] = _POSIX_VDISABLE;
251			if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &tio) != 0)
252			cu_err(1, "tcsetattr");
253			}
254
255			void
256			restore_termios(void)
257			{
258			if (isatty(STDIN_FILENO))
259			tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_tio);
260			}
261
262			int
263			set_line(int speed)
264			{
265			struct termios tio;
266
267			memcpy(&tio, &line_tio, sizeof(tio));
268			tio.c_iflag &= ~(ISTRIP\|ICRNL);
269			tio.c_oflag &= ~OPOST;
270			tio.c_lflag &= ~(ICANON\|ISIG\|IEXTEN\|ECHO);
271			tio.c_cflag &= ~(CSIZE\|PARENB);
272			tio.c_cflag \|= CREAD\|CS8\|CLOCAL;
273			tio.c_cc[VMIN] = 1;
274			tio.c_cc[VTIME] = 0;
275			cfsetspeed(&tio, speed);
276			if (tcsetattr(line_fd, TCSAFLUSH, &tio) != 0)
277			return (-1);
278			return (0);
279			}
280
281			void
282			stream_read(struct bufferevent bufev, void data)
283			{
284			char new_data, ptr;
285			size_t new_size;
286			int state_change;
287
288			new_data = EVBUFFER_DATA(input_ev->input);
289			new_size = EVBUFFER_LENGTH(input_ev->input);
290			if (new_size == 0)
291			return;
292
293			state_change = isatty(STDIN_FILENO);
294			for (ptr = new_data; ptr < new_data + new_size; ptr++) {
295			switch (last_state) {
296			case STATE_NONE:
297			if (state_change && *ptr == '\r')
298			last_state = STATE_NEWLINE;
299			break;
300			case STATE_NEWLINE:
301			if (state_change && *ptr == '~') {
302			last_state = STATE_TILDE;
303			continue;
304			}
305			if (*ptr != '\r')
306			last_state = STATE_NONE;
307			break;
308			case STATE_TILDE:
309			do_command(*ptr);
310			last_state = STATE_NEWLINE;
311			continue;
312			}
313
314			bufferevent_write(line_ev, ptr, 1);
315			}
316
317			evbuffer_drain(input_ev->input, new_size);
318			}
319
320			void
321			stream_error(struct bufferevent bufev, short what, void data)
322			{
323			event_loopexit(NULL);
324			}
325
326			void
327			line_read(struct bufferevent bufev, void data)
328			{
329			char *new_data;
330			size_t new_size;
331
332			new_data = EVBUFFER_DATA(line_ev->input);
333			new_size = EVBUFFER_LENGTH(line_ev->input);
334			if (new_size == 0)
335			return;
336
337			if (record_file != NULL)
338			fwrite(new_data, 1, new_size, record_file);
339			bufferevent_write(output_ev, new_data, new_size);
340
341			evbuffer_drain(line_ev->input, new_size);
342			}
343
344			void
345			line_error(struct bufferevent bufev, short what, void data)
346			{
347			event_loopexit(NULL);
348			}
349
350			void
351			try_remote(const char host, const char path, const char *entry)
352			{
353			const char *paths[] = { "/etc/remote", NULL, NULL };
354			char cp, s;
355			long l;
356			int error;
357
358			if (path != NULL) {
359			paths[0] = path;
360			paths[1] = "/etc/remote";
361			}
362
363			if (entry != NULL && cgetset(entry) != 0)
364			cu_errx(1, "cgetset failed");
365			error = cgetent(&cp, (char *)paths, (char )host);
366			if (error < 0) {
367			switch (error) {
368			case -1:
369			cu_errx(1, "unknown host %s", host);
370			case -2:
371			cu_errx(1, "can't open remote file");
372			case -3:
373			cu_errx(1, "loop in remote file");
374			default:
375			cu_errx(1, "unknown error in remote file");
376			}
377			}
378
379			if (is_direct == -1 && cgetcap(cp, "dc", ':') != NULL)
380			is_direct = 1;
381
382			if (line_path == NULL && cgetstr(cp, "dv", &s) >= 0)
383			line_path = s;
384
385			if (line_speed == -1 && cgetnum(cp, "br", &l) >= 0) {
386			if (l < 0 \|\| l > INT_MAX)
387			cu_errx(1, "speed out of range");
388			line_speed = l;
389			}
390			}
391
392			/* Expands tildes in the file name. Based on code from ssh/misc.c. */
393			char *
394			tilde_expand(const char *filename1)
395			{
396			const char filename, path, *sep;
397			char user[128], *out;
398			struct passwd *pw;
399			u_int len, slash;
400			int rv;
401
402			if (*filename1 != '~')
403			goto no_change;
404			filename = filename1 + 1;
405
406			path = strchr(filename, '/');
407			if (path != NULL && path > filename) { /* ~user/path */
408			slash = path - filename;
409			if (slash > sizeof(user) - 1)
410			goto no_change;
411			memcpy(user, filename, slash);
412			user[slash] = '\0';
413			if ((pw = getpwnam(user)) == NULL)
414			goto no_change;
415			} else if ((pw = getpwuid(getuid())) == NULL) /* ~/path */
416			goto no_change;
417
418			/* Make sure directory has a trailing '/' */
419			len = strlen(pw->pw_dir);
420			if (len == 0 \|\| pw->pw_dir[len - 1] != '/')
421			sep = "/";
422			else
423			sep = "";
424
425			/* Skip leading '/' from specified path */
426			if (path != NULL)
427			filename = path + 1;
428
429			if ((rv = asprintf(&out, "%s%s%s", pw->pw_dir, sep, filename)) == -1)
430			cu_err(1, "asprintf");
431			if (rv >= PATH_MAX) {
432			free(out);
433			goto no_change;
434			}
435
436			return (out);
437
438			no_change:
439			out = strdup(filename1);
440			if (out == NULL)
441			cu_err(1, "strdup");
442			return (out);
443			}