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 %

Line Branch Exec Source
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/* $OpenBSD: tmux.c,v 1.184 2017/07/12 09:21:25 nicm Exp $ */
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/*
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 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <errno.h>
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#include <event.h>
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#include <fcntl.h>
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#include <langinfo.h>
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#include <locale.h>
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#include <paths.h>
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#include <pwd.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <util.h>
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#include "tmux.h"
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struct options	*global_options;	/* server options */
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struct options	*global_s_options;	/* session options */
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struct options	*global_w_options;	/* window options */
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struct environ	*global_environ;
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struct hooks	*global_hooks;
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struct timeval	 start_time;
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const char	*socket_path;
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int		 ptm_fd = -1;
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const char	*shell_command;
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static __dead void	 usage(void);
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static char		*make_label(const char *);
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static const char	*getshell(void);
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static int		 checkshell(const char *);
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static __dead void
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usage(void)
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{
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	fprintf(stderr,
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	    "usage: %s [-2Cluv] [-c shell-command] [-f file] [-L socket-name]\n"
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	    "            [-S socket-path] [command [flags]]\n",
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	    getprogname());
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	exit(1);
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}
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static const char *
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getshell(void)
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{
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	struct passwd	*pw;
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	const char	*shell;
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	shell = getenv("SHELL");
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	if (checkshell(shell))
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		return (shell);
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	pw = getpwuid(getuid());
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	if (pw != NULL && checkshell(pw->pw_shell))
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		return (pw->pw_shell);
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	return (_PATH_BSHELL);
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}
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static int
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checkshell(const char *shell)
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{
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	if (shell == NULL || *shell != '/')
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		return (0);
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	if (areshell(shell))
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		return (0);
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	if (access(shell, X_OK) != 0)
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		return (0);
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	return (1);
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}
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int
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areshell(const char *shell)
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{
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	const char	*progname, *ptr;
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	if ((ptr = strrchr(shell, '/')) != NULL)
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		ptr++;
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	else
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		ptr = shell;
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	progname = getprogname();
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	if (*progname == '-')
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		progname++;
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	if (strcmp(ptr, progname) == 0)
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		return (1);
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	return (0);
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}
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static char *
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make_label(const char *label)
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{
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	char		*base, resolved[PATH_MAX], *path, *s;
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	struct stat	 sb;
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	uid_t		 uid;
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	int		 saved_errno;
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	if (label == NULL)
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		label = "default";
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	uid = getuid();
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	if ((s = getenv("TMUX_TMPDIR")) != NULL && *s != '\0')
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		xasprintf(&base, "%s/tmux-%ld", s, (long)uid);
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	else
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		xasprintf(&base, "%s/tmux-%ld", _PATH_TMP, (long)uid);
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	if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST)
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		goto fail;
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	if (lstat(base, &sb) != 0)
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		goto fail;
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	if (!S_ISDIR(sb.st_mode)) {
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		errno = ENOTDIR;
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		goto fail;
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	}
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	if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
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		errno = EACCES;
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		goto fail;
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	}
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	if (realpath(base, resolved) == NULL)
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		strlcpy(resolved, base, sizeof resolved);
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	xasprintf(&path, "%s/%s", resolved, label);
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	free(base);
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	return (path);
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fail:
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	saved_errno = errno;
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	free(base);
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	errno = saved_errno;
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	return (NULL);
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}
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void
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setblocking(int fd, int state)
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{
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	int mode;
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	if ((mode = fcntl(fd, F_GETFL)) != -1) {
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		if (!state)
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			mode |= O_NONBLOCK;
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		else
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			mode &= ~O_NONBLOCK;
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		fcntl(fd, F_SETFL, mode);
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	}
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}
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const char *
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find_home(void)
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{
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	struct passwd		*pw;
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	static const char	*home;
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	if (home != NULL)
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		return (home);
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	home = getenv("HOME");
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	if (home == NULL || *home == '\0') {
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		pw = getpwuid(getuid());
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		if (pw != NULL)
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			home = pw->pw_dir;
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		else
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			home = NULL;
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	}
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	return (home);
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}
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int
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main(int argc, char **argv)
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{
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	char					*path, *label, **var;
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	char					 tmp[PATH_MAX];
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	const char				*s, *shell;
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	int					 opt, flags, keys;
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	const struct options_table_entry	*oe;
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	if (setlocale(LC_CTYPE, "en_US.UTF-8") == NULL &&
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	    setlocale(LC_CTYPE, "C.UTF-8") == NULL) {
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		if (setlocale(LC_CTYPE, "") == NULL)
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			errx(1, "invalid LC_ALL, LC_CTYPE or LANG");
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		s = nl_langinfo(CODESET);
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		if (strcasecmp(s, "UTF-8") != 0 && strcasecmp(s, "UTF8") != 0)
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			errx(1, "need UTF-8 locale (LC_CTYPE) but have %s", s);
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	}
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	setlocale(LC_TIME, "");
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	tzset();
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	if (**argv == '-')
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		flags = CLIENT_LOGIN;
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	else
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		flags = 0;
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	label = path = NULL;
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	while ((opt = getopt(argc, argv, "2c:Cdf:lL:qS:uUv")) != -1) {
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		switch (opt) {
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		case '2':
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			flags |= CLIENT_256COLOURS;
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			break;
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		case 'c':
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			shell_command = optarg;
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			break;
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		case 'C':
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			if (flags & CLIENT_CONTROL)
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				flags |= CLIENT_CONTROLCONTROL;
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			else
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				flags |= CLIENT_CONTROL;
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			break;
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		case 'f':
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			set_cfg_file(optarg);
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			break;
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		case 'l':
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			flags |= CLIENT_LOGIN;
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			break;
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		case 'L':
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			free(label);
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			label = xstrdup(optarg);
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			break;
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		case 'q':
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			break;
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		case 'S':
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			free(path);
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			path = xstrdup(optarg);
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			break;
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		case 'u':
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			flags |= CLIENT_UTF8;
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			break;
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		case 'v':
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			log_add_level();
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			break;
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		default:
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			usage();
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	if (shell_command != NULL && argc != 0)
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		usage();
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	if ((ptm_fd = getptmfd()) == -1)
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		err(1, "getptmfd");
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	if (pledge("stdio rpath wpath cpath flock fattr unix getpw sendfd "
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	    "recvfd proc exec tty ps", NULL) != 0)
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		err(1, "pledge");
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	/*
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	 * tmux is a UTF-8 terminal, so if TMUX is set, assume UTF-8.
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	 * Otherwise, if the user has set LC_ALL, LC_CTYPE or LANG to contain
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	 * UTF-8, it is a safe assumption that either they are using a UTF-8
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	 * terminal, or if not they know that output from UTF-8-capable
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	 * programs may be wrong.
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	 */
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	if (getenv("TMUX") != NULL)
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		flags |= CLIENT_UTF8;
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	else {
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		s = getenv("LC_ALL");
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		if (s == NULL || *s == '\0')
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			s = getenv("LC_CTYPE");
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		if (s == NULL || *s == '\0')
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			s = getenv("LANG");
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		if (s == NULL || *s == '\0')
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			s = "";
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		if (strcasestr(s, "UTF-8") != NULL ||
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		    strcasestr(s, "UTF8") != NULL)
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			flags |= CLIENT_UTF8;
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	}
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	global_hooks = hooks_create(NULL);
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	global_environ = environ_create();
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	for (var = environ; *var != NULL; var++)
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		environ_put(global_environ, *var);
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	if (getcwd(tmp, sizeof tmp) != NULL)
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		environ_set(global_environ, "PWD", "%s", tmp);
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	global_options = options_create(NULL);
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	global_s_options = options_create(NULL);
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	global_w_options = options_create(NULL);
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	for (oe = options_table; oe->name != NULL; oe++) {
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		if (oe->scope == OPTIONS_TABLE_SERVER)
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			options_default(global_options, oe);
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		if (oe->scope == OPTIONS_TABLE_SESSION)
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			options_default(global_s_options, oe);
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		if (oe->scope == OPTIONS_TABLE_WINDOW)
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			options_default(global_w_options, oe);
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	}
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	/*
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	 * The default shell comes from SHELL or from the user's passwd entry
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	 * if available.
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	 */
316
	shell = getshell();
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	options_set_string(global_s_options, "default-shell", 0, "%s", shell);
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319
	/* Override keys to vi if VISUAL or EDITOR are set. */
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	if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
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		if (strrchr(s, '/') != NULL)
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			s = strrchr(s, '/') + 1;
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		if (strstr(s, "vi") != NULL)
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			keys = MODEKEY_VI;
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		else
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			keys = MODEKEY_EMACS;
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		options_set_number(global_s_options, "status-keys", keys);
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		options_set_number(global_w_options, "mode-keys", keys);
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	}
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331
	/*
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	 * If socket is specified on the command-line with -S or -L, it is
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	 * used. Otherwise, $TMUX is checked and if that fails "default" is
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	 * 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);
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	}
347
	socket_path = path;
348
	free(label);
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350
	/* Pass control to the client. */
351
	exit(client_main(event_init(), argc, argv, flags));
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}