Adding upstream version 3.3a.upstream/3.3aupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 520 insertions, 0 deletions

diff --git a/tmux.c b/tmux.c
new file mode 100644
index 0000000..b9f2be3
--- /dev/null
+++ b/tmux.c
@@ -0,0 +1,520 @@
+/* $OpenBSD$ */
+
+/*
+ * 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 <sys/utsname.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <langinfo.h>
+#include <locale.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.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 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 *, char **);
+
+static int		 areshell(const char *);
+static const char	*getshell(void);
+
+static __dead void
+usage(void)
+{
+	fprintf(stderr,
+	    "usage: %s [-2CDlNuvV] [-c shell-command] [-f file] [-L socket-name]\n"
+	    "            [-S socket-path] [-T features] [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);
+}
+
+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);
+}
+
+static 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 *
+expand_path(const char *path, const char *home)
+{
+	char			*expanded, *name;
+	const char		*end;
+	struct environ_entry	*value;
+
+	if (strncmp(path, "~/", 2) == 0) {
+		if (home == NULL)
+			return (NULL);
+		xasprintf(&expanded, "%s%s", home, path + 1);
+		return (expanded);
+	}
+
+	if (*path == '$') {
+		end = strchr(path, '/');
+		if (end == NULL)
+			name = xstrdup(path + 1);
+		else
+			name = xstrndup(path + 1, end - path - 1);
+		value = environ_find(global_environ, name);
+		free(name);
+		if (value == NULL)
+			return (NULL);
+		if (end == NULL)
+			end = "";
+		xasprintf(&expanded, "%s%s", value->value, end);
+		return (expanded);
+	}
+
+	return (xstrdup(path));
+}
+
+static void
+expand_paths(const char *s, char ***paths, u_int *n, int ignore_errors)
+{
+	const char	*home = find_home();
+	char		*copy, *next, *tmp, resolved[PATH_MAX], *expanded;
+	char		*path;
+	u_int		 i;
+
+	*paths = NULL;
+	*n = 0;
+
+	copy = tmp = xstrdup(s);
+	while ((next = strsep(&tmp, ":")) != NULL) {
+		expanded = expand_path(next, home);
+		if (expanded == NULL) {
+			log_debug("%s: invalid path: %s", __func__, next);
+			continue;
+		}
+		if (realpath(expanded, resolved) == NULL) {
+			log_debug("%s: realpath(\"%s\") failed: %s", __func__,
+			    expanded, strerror(errno));
+			if (ignore_errors) {
+				free(expanded);
+				continue;
+			}
+			path = expanded;
+		} else {
+			path = xstrdup(resolved);
+			free(expanded);
+		}
+		for (i = 0; i < *n; i++) {
+			if (strcmp(path, (*paths)[i]) == 0)
+				break;
+		}
+		if (i != *n) {
+			log_debug("%s: duplicate path: %s", __func__, path);
+			free(path);
+			continue;
+		}
+		*paths = xreallocarray(*paths, (*n) + 1, sizeof *paths);
+		(*paths)[(*n)++] = path;
+	}
+	free(copy);
+}
+
+static char *
+make_label(const char *label, char **cause)
+{
+	char		**paths, *path, *base;
+	u_int		  i, n;
+	struct stat	  sb;
+	uid_t		  uid;
+
+	*cause = NULL;
+	if (label == NULL)
+		label = "default";
+	uid = getuid();
+
+	expand_paths(TMUX_SOCK, &paths, &n, 1);
+	if (n == 0) {
+		xasprintf(cause, "no suitable socket path");
+		return (NULL);
+	}
+	path = paths[0]; /* can only have one socket! */
+	for (i = 1; i < n; i++)
+		free(paths[i]);
+	free(paths);
+
+	xasprintf(&base, "%s/tmux-%ld", path, (long)uid);
+	free(path);
+	if (mkdir(base, S_IRWXU) != 0 && errno != EEXIST) {
+		xasprintf(cause, "couldn't create directory %s (%s)", base,
+		    strerror(errno));
+		goto fail;
+	}
+	if (lstat(base, &sb) != 0) {
+		xasprintf(cause, "couldn't read directory %s (%s)", base,
+		    strerror(errno));
+		goto fail;
+	}
+	if (!S_ISDIR(sb.st_mode)) {
+		xasprintf(cause, "%s is not a directory", base);
+		goto fail;
+	}
+	if (sb.st_uid != uid || (sb.st_mode & S_IRWXO) != 0) {
+		xasprintf(cause, "directory %s has unsafe permissions", base);
+		goto fail;
+	}
+	xasprintf(&path, "%s/%s", base, label);
+	free(base);
+	return (path);
+
+fail:
+	free(base);
+	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);
+	}
+}
+
+uint64_t
+get_timer(void)
+{
+	struct timespec	ts;
+
+	/*
+	 * We want a timestamp in milliseconds suitable for time measurement,
+	 * so prefer the monotonic clock.
+	 */
+	if (clock_gettime(CLOCK_MONOTONIC, &ts) != 0)
+		clock_gettime(CLOCK_REALTIME, &ts);
+	return ((ts.tv_sec * 1000ULL) + (ts.tv_nsec / 1000000ULL));
+}
+
+const char *
+sig2name(int signo)
+{
+     static char	s[11];
+
+#ifdef HAVE_SYS_SIGNAME
+     if (signo > 0 && signo < NSIG)
+	     return (sys_signame[signo]);
+#endif
+     xsnprintf(s, sizeof s, "%d", signo);
+     return (s);
+}
+
+const char *
+find_cwd(void)
+{
+	char		 resolved1[PATH_MAX], resolved2[PATH_MAX];
+	static char	 cwd[PATH_MAX];
+	const char	*pwd;
+
+	if (getcwd(cwd, sizeof cwd) == NULL)
+		return (NULL);
+	if ((pwd = getenv("PWD")) == NULL || *pwd == '\0')
+		return (cwd);
+
+	/*
+	 * We want to use PWD so that symbolic links are maintained,
+	 * but only if it matches the actual working directory.
+	 */
+	if (realpath(pwd, resolved1) == NULL)
+		return (cwd);
+	if (realpath(cwd, resolved2) == NULL)
+		return (cwd);
+	if (strcmp(resolved1, resolved2) != 0)
+		return (cwd);
+	return (pwd);
+}
+
+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);
+}
+
+const char *
+getversion(void)
+{
+	return (TMUX_VERSION);
+}
+
+int
+main(int argc, char **argv)
+{
+	char					*path = NULL, *label = NULL;
+	char					*cause, **var;
+	const char				*s, *cwd;
+	int					 opt, keys, feat = 0, fflag = 0;
+	uint64_t				 flags = 0;
+	const struct options_table_entry	*oe;
+	u_int					 i;
+
+	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;
+
+	global_environ = environ_create();
+	for (var = environ; *var != NULL; var++)
+		environ_put(global_environ, *var, 0);
+	if ((cwd = find_cwd()) != NULL)
+		environ_set(global_environ, "PWD", 0, "%s", cwd);
+	expand_paths(TMUX_CONF, &cfg_files, &cfg_nfiles, 1);
+
+	while ((opt = getopt(argc, argv, "2c:CDdf:lL:NqS:T:uUvV")) != -1) {
+		switch (opt) {
+		case '2':
+			tty_add_features(&feat, "256", ":,");
+			break;
+		case 'c':
+			shell_command = optarg;
+			break;
+		case 'D':
+			flags |= CLIENT_NOFORK;
+			break;
+		case 'C':
+			if (flags & CLIENT_CONTROL)
+				flags |= CLIENT_CONTROLCONTROL;
+			else
+				flags |= CLIENT_CONTROL;
+			break;
+		case 'f':
+			if (!fflag) {
+				fflag = 1;
+				for (i = 0; i < cfg_nfiles; i++)
+					free(cfg_files[i]);
+				cfg_nfiles = 0;
+			}
+			cfg_files = xreallocarray(cfg_files, cfg_nfiles + 1,
+			    sizeof *cfg_files);
+			cfg_files[cfg_nfiles++] = xstrdup(optarg);
+			cfg_quiet = 0;
+			break;
+ 		case 'V':
+			printf("%s %s\n", getprogname(), getversion());
+ 			exit(0);
+		case 'l':
+			flags |= CLIENT_LOGIN;
+			break;
+		case 'L':
+			free(label);
+			label = xstrdup(optarg);
+			break;
+		case 'N':
+			flags |= CLIENT_NOSTARTSERVER;
+			break;
+		case 'q':
+			break;
+		case 'S':
+			free(path);
+			path = xstrdup(optarg);
+			break;
+		case 'T':
+			tty_add_features(&feat, 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 ((flags & CLIENT_NOFORK) && 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_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.
+	 */
+	options_set_string(global_s_options, "default-shell", 0, "%s",
+	    getshell());
+
+	/* Override keys to vi if VISUAL or EDITOR are set. */
+	if ((s = getenv("VISUAL")) != NULL || (s = getenv("EDITOR")) != NULL) {
+		options_set_string(global_options, "editor", 0, "%s", s);
+		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) {
+		if ((path = make_label(label, &cause)) == NULL) {
+			if (cause != NULL) {
+				fprintf(stderr, "%s\n", cause);
+				free(cause);
+			}
+			exit(1);
+		}
+		flags |= CLIENT_DEFAULTSOCKET;
+	}
+	socket_path = path;
+	free(label);
+
+	/* Pass control to the client. */
+	exit(client_main(osdep_event_init(), argc, argv, flags, feat));
+}