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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/tmux/tmux.c	Lines:	0	156	0.0 %
Date:	2017-11-13	Branches:	0	135	0.0 %


/* $OpenBSD: tmux.c,v 1.184 2017/07/12 09:21:25 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * 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/types.h>
#include <sys/stat.h>

#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <langinfo.h>
#include <locale.h>
#include <paths.h>
#include <pwd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <util.h>

#include "tmux.h"

struct options	*global_options;	/* server options */
struct options	*global_s_options;	/* session options */
struct options	*global_w_options;	/* window options */
struct environ	*global_environ;
struct hooks	*global_hooks;

struct timeval	 start_time;
const char	*socket_path;
int		 ptm_fd = -1;
const char	*shell_command;

static __dead void	 usage(void);
static char		*make_label(const char *);

static const char	*getshell(void);
static int		 checkshell(const char *);

static __dead void
usage(void)
{
	fprintf(stderr,
	    "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
	    "            [-S socket-path] [command [flags]]\n",
	    getprogname());
	exit(1);
}

static const char *
getshell(void)
{
	struct passwd	*pw;
	const char	*shell;

	shell = getenv("SHELL");
	if (checkshell(shell))
		return (shell);

	pw = getpwuid(getuid());
	if (pw != NULL && checkshell(pw->pw_shell))
		return (pw->pw_shell);

	return (_PATH_BSHELL);
}

static int
checkshell(const char *shell)
{
	if (shell == NULL || *shell != '/')
		return (0);
	if (areshell(shell))
		return (0);
	if (access(shell, X_OK) != 0)
		return (0);
	return (1);
}

int
areshell(const char *shell)
{
	const char	*progname, *ptr;

	if ((ptr = strrchr(shell, '/')) != NULL)
		ptr++;
	else
		ptr = shell;
	progname = getprogname();
	if (*progname == '-')
		progname++;
	if (strcmp(ptr, progname) == 0)
		return (1);
	return (0);
}

static char *
make_label(const char *label)
{
	char		*base, resolved[PATH_MAX], *path, *s;
	struct stat	 sb;
	uid_t		 uid;
	int		 saved_errno;

	if (label == NULL)
		label = "default";
	uid = getuid();

	if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
		xasprintf(&base, "%s/tmux-%ld", s, (long)uid);
	else
		xasprintf(&base, "%s/tmux-%ld", _PATH_TMP, (long)uid);

	if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
		goto fail;

	if (lstat(base, &sb) != 0)
		goto fail;
	if (!S_ISDIR(sb.st_mode)) {
		errno = ENOTDIR;
		goto fail;
	}
	if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
		errno = EACCES;
		goto fail;
	}

	if (realpath(base, resolved) == NULL)
		strlcpy(resolved, base, sizeof resolved);
	xasprintf(&path, "%s/%s", resolved, label);

	free(base);
	return (path);

fail:
	saved_errno = errno;
	free(base);
	errno = saved_errno;
	return (NULL);
}

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

	if ((mode = fcntl(fd, F_GETFL)) != -1) {
		if (!state)
			mode |= O_NONBLOCK;
		else
			mode &= ~O_NONBLOCK;
		fcntl(fd, F_SETFL, mode);
	}
}

const char *
find_home(void)
{
	struct passwd		*pw;
	static const char	*home;

	if (home != NULL)
		return (home);

	home = getenv("HOME");
	if (home == NULL || *home == '\0') {
		pw = getpwuid(getuid());
		if (pw != NULL)
			home = pw->pw_dir;
		else
			home = NULL;
	}

	return (home);
}

int
main(int argc, char **argv)
{
	char					*path, *label, **var;
	char					 tmp[PATH_MAX];
	const char				*s, *shell;
	int					 opt, flags, keys;
	const struct options_table_entry	*oe;

	if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL &&
	    setlocale(LC_CTYPE, "C.UTF-8") == NULL) {
		if (setlocale(LC_CTYPE, "") == NULL)
			errx(1, "invalid LC_ALL, LC_CTYPE or LANG");
		s = nl_langinfo(CODESET);
		if (strcasecmp(s, "UTF-8") != 0 && strcasecmp(s, "UTF8") != 0)
			errx(1, "need UTF-8 locale (LC_CTYPE) but have %s", s);
	}

	setlocale(LC_TIME, "");
	tzset();

	if (**argv == '-')
		flags = CLIENT_LOGIN;
	else
		flags = 0;

	label = path = NULL;
	while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
		switch (opt) {
		case '2':
			flags |= CLIENT_256COLOURS;
			break;
		case 'c':
			shell_command = optarg;
			break;
		case 'C':
			if (flags & CLIENT_CONTROL)
				flags |= CLIENT_CONTROLCONTROL;
			else
				flags |= CLIENT_CONTROL;
			break;
		case 'f':
			set_cfg_file(optarg);
			break;
		case 'l':
			flags |= CLIENT_LOGIN;
			break;
		case 'L':
			free(label);
			label = xstrdup(optarg);
			break;
		case 'q':
			break;
		case 'S':
			free(path);
			path = xstrdup(optarg);
			break;
		case 'u':
			flags |= CLIENT_UTF8;
			break;
		case 'v':
			log_add_level();
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (shell_command != NULL && argc != 0)
		usage();

	if ((ptm_fd = getptmfd()) == -1)
		err(1, "getptmfd");
	if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
	    "recvfd proc exec tty ps", NULL) != 0)
		err(1, "pledge");

	/*
	 * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
	 * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
	 * UTF-8, it is a safe assumption that either they are using a UTF-8
	 * terminal, or if not they know that output from UTF-8-capable
	 * programs may be wrong.
	 */
	if (getenv("TMUX") != NULL)
		flags |= CLIENT_UTF8;
	else {
		s = getenv("LC_ALL");
		if (s == NULL || *s == '\0')
			s = getenv("LC_CTYPE");
		if (s == NULL || *s == '\0')
			s = getenv("LANG");
		if (s == NULL || *s == '\0')
			s = "";
		if (strcasestr(s, "UTF-8") != NULL ||
		    strcasestr(s, "UTF8") != NULL)
			flags |= CLIENT_UTF8;
	}

	global_hooks = hooks_create(NULL);

	global_environ = environ_create();
	for (var = environ; *var != NULL; var++)
		environ_put(global_environ, *var);
	if (getcwd(tmp, sizeof tmp) != NULL)
		environ_set(global_environ, "PWD", "%s", tmp);

	global_options = options_create(NULL);
	global_s_options = options_create(NULL);
	global_w_options = options_create(NULL);
	for (oe = options_table; oe->name != NULL; oe++) {
		if (oe->scope == OPTIONS_TABLE_SERVER)
			options_default(global_options, oe);
		if (oe->scope == OPTIONS_TABLE_SESSION)
			options_default(global_s_options, oe);
		if (oe->scope == OPTIONS_TABLE_WINDOW)
			options_default(global_w_options, oe);
	}

	/*
	 * The default shell comes from SHELL or from the user's passwd entry
	 * if available.
	 */
	shell = getshell();
	options_set_string(global_s_options, "default-shell", 0, "%s", shell);

	/* Override keys to vi if VISUAL or EDITOR are set. */
	if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
		if (strrchr(s, '/') != NULL)
			s = strrchr(s, '/') + 1;
		if (strstr(s, "vi") != NULL)
			keys = MODEKEY_VI;
		else
			keys = MODEKEY_EMACS;
		options_set_number(global_s_options, "status-keys", keys);
		options_set_number(global_w_options, "mode-keys", keys);
	}

	/*
	 * If socket is specified on the command-line with -S or -L, it is
	 * used. Otherwise, $TMUX is checked and if that fails "default" is
	 * used.
	 */
	if (path == NULL && label == NULL) {
		s = getenv("TMUX");
		if (s != NULL && *s != '\0' && *s != ',') {
			path = xstrdup(s);
			path[strcspn(path, ",")] = '\0';
		}
	}
	if (path == NULL && (path = make_label(label)) == NULL) {
		fprintf(stderr, "can't create socket: %s\n", strerror(errno));
		exit(1);
	}
	socket_path = path;
	free(label);

	/* Pass control to the client. */
	exit(client_main(event_init(), argc, argv, flags));
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: tmux.c,v 1.184 2017/07/12 09:21:25 nicm Exp $ */
2
3			/*
4			* Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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/types.h>
20			#include <sys/stat.h>
21
22			#include <err.h>
23			#include <errno.h>
24			#include <event.h>
25			#include <fcntl.h>
26			#include <langinfo.h>
27			#include <locale.h>
28			#include <paths.h>
29			#include <pwd.h>
30			#include <stdlib.h>
31			#include <string.h>
32			#include <time.h>
33			#include <unistd.h>
34			#include <util.h>
35
36			#include "tmux.h"
37
38			struct options global_options; / server options */
39			struct options global_s_options; / session options */
40			struct options global_w_options; / window options */
41			struct environ *global_environ;
42			struct hooks *global_hooks;
43
44			struct timeval start_time;
45			const char *socket_path;
46			int ptm_fd = -1;
47			const char *shell_command;
48
49			static __dead void usage(void);
50			static char make_label(const char );
51
52			static const char *getshell(void);
53			static int checkshell(const char *);
54
55			static __dead void
56			usage(void)
57			{
58			fprintf(stderr,
59			"usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
60			" [-S socket-path] [command [flags]]\n",
61			getprogname());
62			exit(1);
63			}
64
65			static const char *
66			getshell(void)
67			{
68			struct passwd *pw;
69			const char *shell;
70
71			shell = getenv("SHELL");
72			if (checkshell(shell))
73			return (shell);
74
75			pw = getpwuid(getuid());
76			if (pw != NULL && checkshell(pw->pw_shell))
77			return (pw->pw_shell);
78
79			return (_PATH_BSHELL);
80			}
81
82			static int
83			checkshell(const char *shell)
84			{
85			if (shell == NULL \|\| *shell != '/')
86			return (0);
87			if (areshell(shell))
88			return (0);
89			if (access(shell, X_OK) != 0)
90			return (0);
91			return (1);
92			}
93
94			int
95			areshell(const char *shell)
96			{
97			const char progname, ptr;
98
99			if ((ptr = strrchr(shell, '/')) != NULL)
100			ptr++;
101			else
102			ptr = shell;
103			progname = getprogname();
104			if (*progname == '-')
105			progname++;
106			if (strcmp(ptr, progname) == 0)
107			return (1);
108			return (0);
109			}
110
111			static char *
112			make_label(const char *label)
113			{
114			char base, resolved[PATH_MAX], path, *s;
115			struct stat sb;
116			uid_t uid;
117			int saved_errno;
118
119			if (label == NULL)
120			label = "default";
121			uid = getuid();
122
123			if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
124			xasprintf(&base, "%s/tmux-%ld", s, (long)uid);
125			else
126			xasprintf(&base, "%s/tmux-%ld", _PATH_TMP, (long)uid);
127
128			if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
129			goto fail;
130
131			if (lstat(base, &sb) != 0)
132			goto fail;
133			if (!S_ISDIR(sb.st_mode)) {
134			errno = ENOTDIR;
135			goto fail;
136			}
137			if (sb.st_uid != uid \|\| (sb.st_mode & S_IRWXO) != 0) {
138			errno = EACCES;
139			goto fail;
140			}
141
142			if (realpath(base, resolved) == NULL)
143			strlcpy(resolved, base, sizeof resolved);
144			xasprintf(&path, "%s/%s", resolved, label);
145
146			free(base);
147			return (path);
148
149			fail:
150			saved_errno = errno;
151			free(base);
152			errno = saved_errno;
153			return (NULL);
154			}
155
156			void
157			setblocking(int fd, int state)
158			{
159			int mode;
160
161			if ((mode = fcntl(fd, F_GETFL)) != -1) {
162			if (!state)
163			mode \|= O_NONBLOCK;
164			else
165			mode &= ~O_NONBLOCK;
166			fcntl(fd, F_SETFL, mode);
167			}
168			}
169
170			const char *
171			find_home(void)
172			{
173			struct passwd *pw;
174			static const char *home;
175
176			if (home != NULL)
177			return (home);
178
179			home = getenv("HOME");
180			if (home == NULL \|\| *home == '\0') {
181			pw = getpwuid(getuid());
182			if (pw != NULL)
183			home = pw->pw_dir;
184			else
185			home = NULL;
186			}
187
188			return (home);
189			}
190
191			int
192			main(int argc, char **argv)
193			{
194			char path, label, **var;
195			char tmp[PATH_MAX];
196			const char s, shell;
197			int opt, flags, keys;
198			const struct options_table_entry *oe;
199
200			if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL &&
201			setlocale(LC_CTYPE, "C.UTF-8") == NULL) {
202			if (setlocale(LC_CTYPE, "") == NULL)
203			errx(1, "invalid LC_ALL, LC_CTYPE or LANG");
204			s = nl_langinfo(CODESET);
205			if (strcasecmp(s, "UTF-8") != 0 && strcasecmp(s, "UTF8") != 0)
206			errx(1, "need UTF-8 locale (LC_CTYPE) but have %s", s);
207			}
208
209			setlocale(LC_TIME, "");
210			tzset();
211
212			if (**argv == '-')
213			flags = CLIENT_LOGIN;
214			else
215			flags = 0;
216
217			label = path = NULL;
218			while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
219			switch (opt) {
220			case '2':
221			flags \|= CLIENT_256COLOURS;
222			break;
223			case 'c':
224			shell_command = optarg;
225			break;
226			case 'C':
227			if (flags & CLIENT_CONTROL)
228			flags \|= CLIENT_CONTROLCONTROL;
229			else
230			flags \|= CLIENT_CONTROL;
231			break;
232			case 'f':
233			set_cfg_file(optarg);
234			break;
235			case 'l':
236			flags \|= CLIENT_LOGIN;
237			break;
238			case 'L':
239			free(label);
240			label = xstrdup(optarg);
241			break;
242			case 'q':
243			break;
244			case 'S':
245			free(path);
246			path = xstrdup(optarg);
247			break;
248			case 'u':
249			flags \|= CLIENT_UTF8;
250			break;
251			case 'v':
252			log_add_level();
253			break;
254			default:
255			usage();
256			}
257			}
258			argc -= optind;
259			argv += optind;
260
261			if (shell_command != NULL && argc != 0)
262			usage();
263
264			if ((ptm_fd = getptmfd()) == -1)
265			err(1, "getptmfd");
266			if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
267			"recvfd proc exec tty ps", NULL) != 0)
268			err(1, "pledge");
269
270			/*
271			* tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
272			* Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
273			* UTF-8, it is a safe assumption that either they are using a UTF-8
274			* terminal, or if not they know that output from UTF-8-capable
275			* programs may be wrong.
276			*/
277			if (getenv("TMUX") != NULL)
278			flags \|= CLIENT_UTF8;
279			else {
280			s = getenv("LC_ALL");
281			if (s == NULL \|\| *s == '\0')
282			s = getenv("LC_CTYPE");
283			if (s == NULL \|\| *s == '\0')
284			s = getenv("LANG");
285			if (s == NULL \|\| *s == '\0')
286			s = "";
287			if (strcasestr(s, "UTF-8") != NULL \|\|
288			strcasestr(s, "UTF8") != NULL)
289			flags \|= CLIENT_UTF8;
290			}
291
292			global_hooks = hooks_create(NULL);
293
294			global_environ = environ_create();
295			for (var = environ; *var != NULL; var++)
296			environ_put(global_environ, *var);
297			if (getcwd(tmp, sizeof tmp) != NULL)
298			environ_set(global_environ, "PWD", "%s", tmp);
299
300			global_options = options_create(NULL);
301			global_s_options = options_create(NULL);
302			global_w_options = options_create(NULL);
303			for (oe = options_table; oe->name != NULL; oe++) {
304			if (oe->scope == OPTIONS_TABLE_SERVER)
305			options_default(global_options, oe);
306			if (oe->scope == OPTIONS_TABLE_SESSION)
307			options_default(global_s_options, oe);
308			if (oe->scope == OPTIONS_TABLE_WINDOW)
309			options_default(global_w_options, oe);
310			}
311
312			/*
313			* The default shell comes from SHELL or from the user's passwd entry
314			* if available.
315			*/
316			shell = getshell();
317			options_set_string(global_s_options, "default-shell", 0, "%s", shell);
318
319			/* Override keys to vi if VISUAL or EDITOR are set. */
320			if ((s = getenv("VISUAL")) != NULL \|\| (s = getenv("EDITOR")) != NULL) {
321			if (strrchr(s, '/') != NULL)
322			s = strrchr(s, '/') + 1;
323			if (strstr(s, "vi") != NULL)
324			keys = MODEKEY_VI;
325			else
326			keys = MODEKEY_EMACS;
327			options_set_number(global_s_options, "status-keys", keys);
328			options_set_number(global_w_options, "mode-keys", keys);
329			}
330
331			/*
332			* If socket is specified on the command-line with -S or -L, it is
333			* used. Otherwise, $TMUX is checked and if that fails "default" is
334			* used.
335			*/
336			if (path == NULL && label == NULL) {
337			s = getenv("TMUX");
338			if (s != NULL && s != '\0' && s != ',') {
339			path = xstrdup(s);
340			path[strcspn(path, ",")] = '\0';
341			}
342			}
343			if (path == NULL && (path = make_label(label)) == NULL) {
344			fprintf(stderr, "can't create socket: %s\n", strerror(errno));
345			exit(1);
346			}
347			socket_path = path;
348			free(label);
349
350			/* Pass control to the client. */
351			exit(client_main(event_init(), argc, argv, flags));
352			}