Having fixed flags for single-character getopt options is a bit hard to

maintain and is only going to get worse as more are used. So instead, add a new
uint64_t member to cmd_entry which is a bitmask of upper and lowercase options
accepted by the command.

This means new single character options can be used without the need to add it
explicitly to the list.

cmd-attach-session.c

@@ -29,7 +29,7 @@ int	cmd_attach_session_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_attach_session_entry = {
 	"attach-session", "attach",
 	"[-d] " CMD_TARGET_SESSION_USAGE,
-       	CMD_DFLAG|CMD_CANTNEST|CMD_STARTSERVER,
+       	CMD_CANTNEST|CMD_STARTSERVER, CMD_CHFLAG('d'),
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_attach_session_exec,
@@ -67,7 +67,7 @@ cmd_attach_session_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	}
 
-	if (data->flags & CMD_DFLAG)
+	if (data->chflags & CMD_CHFLAG('d'))
 		server_write_session(s, MSG_DETACH, NULL, 0);
 	ctx->cmdclient->session = s;
 

cmd-bind-key.c

@@ -40,7 +40,7 @@ struct cmd_bind_key_data {
 const struct cmd_entry cmd_bind_key_entry = {
 	"bind-key", "bind",
 	"[-r] key command [arguments]",
-	0,
+	0, 0,
 	NULL,
 	cmd_bind_key_parse,
 	cmd_bind_key_exec,

cmd-break-pane.c

@@ -31,7 +31,7 @@ int	cmd_break_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_break_pane_entry = {
 	"break-pane", "breakp",
 	CMD_PANE_WINDOW_USAGE " [-d]",
-	CMD_DFLAG,
+	0, CMD_CHFLAG('d'),
 	cmd_pane_init,
 	cmd_pane_parse,
 	cmd_break_pane_exec,
@@ -82,7 +82,7 @@ cmd_break_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
  	w->name = default_window_name(w);
 
  	wl = session_attach(s, w, -1, &cause); /* can't fail */
- 	if (!(data->flags & CMD_DFLAG))
+ 	if (!(data->chflags & CMD_CHFLAG('d')))
  		session_select(s, wl->idx);
  	layout_refresh(w, 0);
 

cmd-choose-session.c

@@ -31,7 +31,7 @@ void	cmd_choose_session_callback(void *, int);
 const struct cmd_entry cmd_choose_session_entry = {
 	"choose-session", NULL,
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_choose_session_exec,

cmd-choose-window.c

@@ -31,7 +31,7 @@ void	cmd_choose_window_callback(void *, int);
 const struct cmd_entry cmd_choose_window_entry = {
 	"choose-window", NULL,
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_choose_window_exec,

cmd-clear-history.c

@@ -29,7 +29,7 @@ int	cmd_clear_history_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_clear_history_entry = {
 	"clear-history", "clearhist",
 	CMD_PANE_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_pane_init,
 	cmd_pane_parse,
 	cmd_clear_history_exec,

cmd-clock-mode.c

@@ -29,7 +29,7 @@ int	cmd_clock_mode_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_clock_mode_entry = {
 	"clock-mode", NULL,
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_clock_mode_exec,

cmd-command-prompt.c

@@ -35,7 +35,7 @@ int	cmd_command_prompt_callback(void *, const char *);
 const struct cmd_entry cmd_command_prompt_entry = {
 	"command-prompt", NULL,
 	CMD_TARGET_CLIENT_USAGE " [template]",
-	CMD_ARG01,
+	CMD_ARG01, 0,
 	cmd_command_prompt_init,
 	cmd_target_parse,
 	cmd_command_prompt_exec,

cmd-confirm-before.c

@@ -38,7 +38,7 @@ struct cmd_confirm_before_data {
 const struct cmd_entry cmd_confirm_before_entry = {
 	"confirm-before", "confirm",
 	CMD_TARGET_CLIENT_USAGE " command",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_confirm_before_init,
 	cmd_target_parse,
 	cmd_confirm_before_exec,

cmd-copy-buffer.c

@@ -42,7 +42,7 @@ struct cmd_copy_buffer_data {
 const struct cmd_entry cmd_copy_buffer_entry = {
 	"copy-buffer", "copyb",
 	"[-a src-index] [-b dst-index] [-s src-session] [-t dst-session]",
-	0,
+	0, 0,
 	cmd_copy_buffer_init,
 	cmd_copy_buffer_parse,
 	cmd_copy_buffer_exec,

cmd-copy-mode.c

@@ -29,7 +29,7 @@ int	cmd_copy_mode_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_copy_mode_entry = {
 	"copy-mode", NULL,
 	"[-u] " CMD_TARGET_WINDOW_USAGE,
-	CMD_UFLAG,
+	0, CMD_CHFLAG('u'),
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_copy_mode_exec,
@@ -51,7 +51,7 @@ cmd_copy_mode_exec(struct cmd *self, struct cmd_ctx *ctx)
 	wp = wl->window->active;
 
 	window_pane_set_mode(wp, &window_copy_mode);
-	if (wp->mode == &window_copy_mode && data->flags & CMD_UFLAG)
+	if (wp->mode == &window_copy_mode && data->chflags & CMD_CHFLAG('u'))
 		window_copy_pageup(wp);
 
 	return (0);

cmd-delete-buffer.c

@@ -31,7 +31,7 @@ int	cmd_delete_buffer_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_delete_buffer_entry = {
 	"delete-buffer", "deleteb",
 	CMD_BUFFER_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_delete_buffer_exec,

cmd-detach-client.c

@@ -29,7 +29,7 @@ int	cmd_detach_client_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_detach_client_entry = {
 	"detach-client", "detach",
 	CMD_TARGET_CLIENT_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_detach_client_exec,

cmd-down-pane.c

@@ -29,7 +29,7 @@ int	cmd_down_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_down_pane_entry = {
 	"down-pane", "downp",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_down_pane_exec,

cmd-find-window.c

@@ -34,7 +34,7 @@ void	cmd_find_window_callback(void *, int);
 const struct cmd_entry cmd_find_window_entry = {
 	"find-window", "findw",
 	CMD_TARGET_WINDOW_USAGE " match-string",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_find_window_exec,

cmd-generic.c

@@ -23,12 +23,9 @@
 
 #include "tmux.h"
 
-#define CMD_FLAGS "adDgkruU"
+int	cmd_getopt(int, char **, const char *, uint64_t);
-#define CMD_FLAGMASK (CMD_AFLAG|CMD_DFLAG|CMD_BIGDFLAG|CMD_GFLAG|CMD_KFLAG| \
+int	cmd_flags(int, uint64_t, uint64_t *);
-    CMD_RFLAG|CMD_UFLAG|CMD_BIGUFLAG)
+size_t	cmd_print_flags(char *, size_t, size_t, uint64_t);
-
-int	cmd_do_flags(int, int, int *);
-size_t	cmd_print_flags(char *, size_t, size_t, int);
 int	cmd_fill_argument(int, char **, int, char **);
 
 size_t
@@ -39,86 +36,70 @@ cmd_prarg(char *buf, size_t len, const char *prefix, char *arg)
 	return (xsnprintf(buf, len, "%s%s", prefix, arg));
 }
 
+/* Prepend flags from chflags onto flagstr and call getopt. */
 int
-cmd_do_flags(int opt, int iflags, int *oflags)
+cmd_getopt(int argc, char **argv, const char *flagstr, uint64_t chflags)
 {
-	switch (opt) {
+	u_char	ch;
-	case 'a':
+	char	buf[128];
-		if (iflags & CMD_AFLAG) {
+	size_t	len, off;
-			(*oflags) |= CMD_AFLAG;
+
-			return (0);
+	*buf = '\0';
+
+	len = sizeof buf;
+	off = 0;
+
+	for (ch = 0; ch < 26; ch++) {
+		if (chflags & CMD_CHFLAG('a' + ch))
+			off += xsnprintf(buf + off, len - off, "%c", 'a' + ch);
+		if (chflags & CMD_CHFLAG('A' + ch))
+			off += xsnprintf(buf + off, len - off, "%c", 'A' + ch);
 	}
-		return (-1);
+	
-	case 'd':
+	strlcat(buf, flagstr, sizeof buf);
-		if (iflags & CMD_DFLAG) {
+
-			(*oflags) |= CMD_DFLAG;
+	return (getopt(argc, argv, buf));
-			return (0);
-		}
-		return (-1);
-	case 'D':
-		if (iflags & CMD_BIGDFLAG) {
-			(*oflags) |= CMD_BIGDFLAG;
-			return (0);
-		}
-		return (-1);
-	case 'g':
-		if (iflags & CMD_GFLAG) {
-			(*oflags) |= CMD_GFLAG;
-			return (0);
-		}
-		return (-1);
-	case 'k':
-		if (iflags & CMD_KFLAG) {
-			(*oflags) |= CMD_KFLAG;
-			return (0);
-		}
-		return (-1);
-	case 'r':
-		if (iflags & CMD_RFLAG) {
-			(*oflags) |= CMD_RFLAG;
-			return (0);
-		}
-		return (-1);
-	case 'u':
-		if (iflags & CMD_UFLAG) {
-			(*oflags) |= CMD_UFLAG;
-			return (0);
-		}
-		return (-1);
-	case 'U':
-		if (iflags & CMD_BIGUFLAG) {
-			(*oflags) |= CMD_BIGUFLAG;
-			return (0);
-		}
-		return (-1);
-	}
-	return (1);
 }
 
-size_t
+/* 
-cmd_print_flags(char *buf, size_t len, size_t off, int flags)
+ * If this option is expected (in ichflags), set it in ochflags, otherwise
+ * return -1.
+ */
+int
+cmd_flags(int opt, uint64_t ichflags, uint64_t *ochflags)
 {
+	u_char	ch;
+
+	for (ch = 0; ch < 26; ch++) {
+		if (opt == 'a' + ch && ichflags & CMD_CHFLAG(opt)) {
+			(*ochflags) |= CMD_CHFLAG(opt);
+			return (0);
+		}
+		if (opt == 'A' + ch && ichflags & CMD_CHFLAG(opt)) {
+			(*ochflags) |= CMD_CHFLAG(opt);
+			return (0);
+		}
+	}
+	return (-1);
+}
+
+/* Print the flags supported in chflags. */
+size_t
+cmd_print_flags(char *buf, size_t len, size_t off, uint64_t chflags)
+{
+	u_char	ch;
 	size_t	boff = off;
 
-	if ((flags & CMD_FLAGMASK) == 0)
+	if (chflags == 0)
 		return (0);
 	off += xsnprintf(buf + off, len - off, " -");
-	if (off < len && flags & CMD_AFLAG)
+
-		off += xsnprintf(buf + off, len - off, "a");
+	for (ch = 0; ch < 26; ch++) {
-	if (off < len && flags & CMD_BIGDFLAG)
+		if (chflags & CMD_CHFLAG('a' + ch))
-		off += xsnprintf(buf + off, len - off, "D");
+			off += xsnprintf(buf + off, len - off, "%c", 'a' + ch);
-	if (off < len && flags & CMD_DFLAG)
+		if (chflags & CMD_CHFLAG('A' + ch))
-		off += xsnprintf(buf + off, len - off, "d");
+			off += xsnprintf(buf + off, len - off, "%c", 'A' + ch);
-	if (off < len && flags & CMD_GFLAG)
+	}
-		off += xsnprintf(buf + off, len - off, "g");
-	if (off < len && flags & CMD_KFLAG)
-		off += xsnprintf(buf + off, len - off, "k");
-	if (off < len && flags & CMD_RFLAG)
-		off += xsnprintf(buf + off, len - off, "r");
-	if (off < len && flags & CMD_UFLAG)
-		off += xsnprintf(buf + off, len - off, "u");
-	if (off < len && flags & CMD_BIGUFLAG)
-		off += xsnprintf(buf + off, len - off, "U");
 	return (off - boff);
 }
 
@@ -153,7 +134,7 @@ cmd_target_init(struct cmd *self, unused int key)
 	struct cmd_target_data	*data;
 
 	self->data = data = xmalloc(sizeof *data);
-	data->flags = 0;
+	data->chflags = 0;
 	data->target = NULL;
 	data->arg = NULL;
 }
@@ -162,19 +143,16 @@ int
 cmd_target_parse(struct cmd *self, int argc, char **argv, char **cause)
 {
 	struct cmd_target_data	*data;
+	const struct cmd_entry	*entry = self->entry;
 	int			 opt;
 
 	/* Don't use the entry version since it may be dependent on key. */
 	cmd_target_init(self, 0);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, CMD_FLAGS "t:")) != -1) {
+	while ((opt = cmd_getopt(argc, argv, "t:", entry->chflags)) != -1) {
-		switch (cmd_do_flags(opt, self->entry->flags, &data->flags)) {
+		if (cmd_flags(opt, entry->chflags, &data->chflags) == 0)
-		case -1:
-			goto usage;
-		case 0:
 			continue;
-		}
 		switch (opt) {
 		case 't':
 			if (data->target == NULL)
@@ -240,7 +218,7 @@ cmd_target_print(struct cmd *self, char *buf, size_t len)
 	off += xsnprintf(buf, len, "%s", self->entry->name);
 	if (data == NULL)
 		return (off);
-	off += cmd_print_flags(buf, len, off, data->flags);
+	off += cmd_print_flags(buf, len, off, data->chflags);
 	if (off < len && data->target != NULL)
 		off += cmd_prarg(buf + off, len - off, " -t ", data->target);
  	if (off < len && data->arg != NULL)
@@ -254,7 +232,7 @@ cmd_srcdst_init(struct cmd *self, unused int key)
 	struct cmd_srcdst_data	*data;
 
 	self->data = data = xmalloc(sizeof *data);
-	data->flags = 0;
+	data->chflags = 0;
 	data->src = NULL;
 	data->dst = NULL;
 	data->arg = NULL;
@@ -264,18 +242,15 @@ int
 cmd_srcdst_parse(struct cmd *self, int argc, char **argv, char **cause)
 {
 	struct cmd_srcdst_data	*data;
+	const struct cmd_entry	*entry = self->entry;
 	int			 opt;
 
 	cmd_srcdst_init(self, 0);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, CMD_FLAGS "s:t:")) != -1) {
+	while ((opt = cmd_getopt(argc, argv, "s:t:", entry->chflags)) != -1) {
-		switch (cmd_do_flags(opt, self->entry->flags, &data->flags)) {
+		if (cmd_flags(opt, entry->chflags, &data->chflags) == 0)
-		case -1:
-			goto usage;
-		case 0:
 			continue;
-		}
 		switch (opt) {
 		case 's':
 			if (data->src == NULL)
@@ -349,7 +324,7 @@ cmd_srcdst_print(struct cmd *self, char *buf, size_t len)
 	off += xsnprintf(buf, len, "%s", self->entry->name);
 	if (data == NULL)
 		return (off);
-	off += cmd_print_flags(buf, len, off, data->flags);
+	off += cmd_print_flags(buf, len, off, data->chflags);
 	if (off < len && data->src != NULL)
 		off += xsnprintf(buf + off, len - off, " -s %s", data->src);
 	if (off < len && data->dst != NULL)
@@ -365,7 +340,7 @@ cmd_buffer_init(struct cmd *self, unused int key)
 	struct cmd_buffer_data	*data;
 
 	self->data = data = xmalloc(sizeof *data);
-	data->flags = 0;
+	data->chflags = 0;
 	data->target = NULL;
 	data->buffer = -1;
 	data->arg = NULL;
@@ -375,19 +350,16 @@ int
 cmd_buffer_parse(struct cmd *self, int argc, char **argv, char **cause)
 {
 	struct cmd_buffer_data	*data;
+	const struct cmd_entry	*entry = self->entry;
 	int			 opt, n;
 	const char		*errstr;
 
 	cmd_buffer_init(self, 0);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, CMD_FLAGS "b:t:")) != -1) {
+	while ((opt = cmd_getopt(argc, argv, "b:t:", entry->chflags)) != -1) {
-		switch (cmd_do_flags(opt, self->entry->flags, &data->flags)) {
+		if (cmd_flags(opt, entry->chflags, &data->chflags) == 0)
-		case -1:
-			goto usage;
-		case 0:
 			continue;
-		}
 		switch (opt) {
 		case 'b':
 			if (data->buffer == -1) {
@@ -464,7 +436,7 @@ cmd_buffer_print(struct cmd *self, char *buf, size_t len)
 	off += xsnprintf(buf, len, "%s", self->entry->name);
 	if (data == NULL)
 		return (off);
-	off += cmd_print_flags(buf, len, off, data->flags);
+	off += cmd_print_flags(buf, len, off, data->chflags);
 	if (off < len && data->buffer != -1)
 		off += xsnprintf(buf + off, len - off, " -b %d", data->buffer);
 	if (off < len && data->target != NULL)
@@ -480,7 +452,7 @@ cmd_option_init(struct cmd *self, unused int key)
 	struct cmd_option_data	*data;
 
 	self->data = data = xmalloc(sizeof *data);
-	data->flags = 0;
+	data->chflags = 0;
 	data->target = NULL;
 	data->option = NULL;
 	data->value = NULL;
@@ -490,19 +462,16 @@ int
 cmd_option_parse(struct cmd *self, int argc, char **argv, char **cause)
 {
 	struct cmd_option_data	*data;
+	const struct cmd_entry	*entry = self->entry;
 	int			 opt;
 
 	/* Don't use the entry version since it may be dependent on key. */
 	cmd_option_init(self, 0);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, CMD_FLAGS "t:")) != -1) {
+	while ((opt = cmd_getopt(argc, argv, "t:", entry->chflags)) != -1) {
-		switch (cmd_do_flags(opt, self->entry->flags, &data->flags)) {
+		if (cmd_flags(opt, entry->chflags, &data->chflags) == 0)
-		case -1:
-			goto usage;
-		case 0:
 			continue;
-		}
 		switch (opt) {
 		case 't':
 			if (data->target == NULL)
@@ -577,7 +546,7 @@ cmd_option_print(struct cmd *self, char *buf, size_t len)
 	off += xsnprintf(buf, len, "%s", self->entry->name);
 	if (data == NULL)
 		return (off);
-	off += cmd_print_flags(buf, len, off, data->flags);
+	off += cmd_print_flags(buf, len, off, data->chflags);
 	if (off < len && data->target != NULL)
 		off += cmd_prarg(buf + off, len - off, " -t ", data->target);
  	if (off < len && data->option != NULL)
@@ -593,7 +562,7 @@ cmd_pane_init(struct cmd *self, unused int key)
 	struct cmd_pane_data	*data;
 
 	self->data = data = xmalloc(sizeof *data);
-	data->flags = 0;
+	data->chflags = 0;
 	data->target = NULL;
 	data->arg = NULL;
 	data->pane = -1;
@@ -603,6 +572,7 @@ int
 cmd_pane_parse(struct cmd *self, int argc, char **argv, char **cause)
 {
 	struct cmd_pane_data	*data;
+	const struct cmd_entry	*entry = self->entry;
 	int			 opt, n;
 	const char		*errstr;
 
@@ -610,13 +580,9 @@ cmd_pane_parse(struct cmd *self, int argc, char **argv, char **cause)
 	cmd_pane_init(self, 0);
 	data = self->data;
 
-	while ((opt = getopt(argc, argv, CMD_FLAGS "p:t:")) != -1) {
+	while ((opt = cmd_getopt(argc, argv, "p:t:", entry->chflags)) != -1) {
-		switch (cmd_do_flags(opt, self->entry->flags, &data->flags)) {
+		if (cmd_flags(opt, entry->chflags, &data->chflags) == 0)
-		case -1:
-			goto usage;
-		case 0:
 			continue;
-		}
 		switch (opt) {
 		case 'p':
 			if (data->pane == -1) {
@@ -693,7 +659,7 @@ cmd_pane_print(struct cmd *self, char *buf, size_t len)
 	off += xsnprintf(buf, len, "%s", self->entry->name);
 	if (data == NULL)
 		return (off);
-	off += cmd_print_flags(buf, len, off, data->flags);
+	off += cmd_print_flags(buf, len, off, data->chflags);
 	if (off < len && data->target != NULL)
 		off += cmd_prarg(buf + off, len - off, " -t ", data->target);
  	if (off < len && data->arg != NULL)

cmd-has-session.c

@@ -29,7 +29,7 @@ int	cmd_has_session_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_has_session_entry = {
 	"has-session", "has",
 	CMD_TARGET_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_has_session_exec,

cmd-if-shell.c

@@ -44,7 +44,7 @@ struct cmd_if_shell_data {
 const struct cmd_entry cmd_if_shell_entry = {
 	"if-shell", "if",
 	"shell-command command",
-	0,
+	0, 0,
 	cmd_if_shell_init,
 	cmd_if_shell_parse,
 	cmd_if_shell_exec,

cmd-kill-pane.c

@@ -31,7 +31,7 @@ int	cmd_kill_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_kill_pane_entry = {
 	"kill-pane", "killp",
 	CMD_PANE_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_pane_init,
 	cmd_pane_parse,
 	cmd_kill_pane_exec,

cmd-kill-server.c

@@ -32,7 +32,7 @@ int	cmd_kill_server_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_kill_server_entry = {
 	"kill-server", NULL,
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_kill_server_exec,

cmd-kill-session.c

@@ -32,7 +32,7 @@ int	cmd_kill_session_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_kill_session_entry = {
 	"kill-session", NULL,
 	CMD_TARGET_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_kill_session_exec,

cmd-kill-window.c

@@ -29,7 +29,7 @@ int	cmd_kill_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_kill_window_entry = {
 	"kill-window", "killw",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_kill_window_exec,

cmd-last-window.c

@@ -29,7 +29,7 @@ int	cmd_last_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_last_window_entry = {
 	"last-window", "last",
 	CMD_TARGET_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_last_window_exec,

cmd-link-window.c

@@ -31,7 +31,7 @@ int	cmd_link_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_link_window_entry = {
 	"link-window", "linkw",
 	"[-dk] " CMD_SRCDST_WINDOW_USAGE,
-	CMD_DFLAG|CMD_KFLAG,
+	0, CMD_CHFLAG('d')|CMD_CHFLAG('k'),
 	cmd_srcdst_init,
 	cmd_srcdst_parse,
 	cmd_link_window_exec,
@@ -62,7 +62,7 @@ cmd_link_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		if (wl_dst->window == wl_src->window)
 			return (0);
 
-		if (data->flags & CMD_KFLAG) {
+		if (data->chflags & CMD_CHFLAG('k')) {
 			/*
 			 * Can't use session_detach as it will destroy session
 			 * if this makes it empty.
@@ -73,7 +73,7 @@ cmd_link_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 
 			/* Force select/redraw if current. */
 			if (wl_dst == dst->curw) {
-				data->flags &= ~CMD_DFLAG;
+				data->chflags &= ~CMD_CHFLAG('d');
 				dst->curw = NULL;
 			}
 		}
@@ -86,7 +86,7 @@ cmd_link_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	}
 
-	if (data->flags & CMD_DFLAG)
+	if (data->chflags & CMD_CHFLAG('d'))
 		server_status_session(dst);
 	else {
 		session_select(dst, wl_dst->idx);

cmd-list-buffers.c

@@ -31,7 +31,7 @@ int	cmd_list_buffers_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_list_buffers_entry = {
 	"list-buffers", "lsb",
 	CMD_TARGET_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_list_buffers_exec,

cmd-list-clients.c

@@ -32,7 +32,7 @@ int	cmd_list_clients_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_list_clients_entry = {
 	"list-clients", "lsc",
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_list_clients_exec,

cmd-list-commands.c

@@ -29,7 +29,7 @@ int	cmd_list_commands_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_list_commands_entry = {
 	"list-commands", "lscm",
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_list_commands_exec,

cmd-list-keys.c

@@ -29,7 +29,7 @@ int	cmd_list_keys_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_list_keys_entry = {
 	"list-keys", "lsk",
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_list_keys_exec,

cmd-list-sessions.c

@@ -31,7 +31,7 @@ int	cmd_list_sessions_exec(struct cmd *, struct cmd_ctx *);
 
 const struct cmd_entry cmd_list_sessions_entry = {
 	"list-sessions", "ls", "",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_list_sessions_exec,

cmd-list-windows.c

@@ -31,7 +31,7 @@ int	cmd_list_windows_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_list_windows_entry = {
 	"list-windows", "lsw",
 	CMD_TARGET_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_list_windows_exec,

cmd-load-buffer.c

@@ -35,7 +35,7 @@ int	cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_load_buffer_entry = {
 	"load-buffer", "loadb",
 	CMD_BUFFER_SESSION_USAGE " path",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_load_buffer_exec,

cmd-lock-server.c

@@ -33,7 +33,7 @@ int	cmd_lock_server_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_lock_server_entry = {
 	"lock-server", "lock",
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_lock_server_exec,

cmd-move-window.c

@@ -31,7 +31,7 @@ int	cmd_move_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_move_window_entry = {
 	"move-window", "movew",
 	"[-dk] " CMD_SRCDST_WINDOW_USAGE,
-	CMD_DFLAG|CMD_KFLAG,
+	0, CMD_CHFLAG('d')|CMD_CHFLAG('k'),
 	cmd_srcdst_init,
 	cmd_srcdst_parse,
 	cmd_move_window_exec,
@@ -64,7 +64,7 @@ cmd_move_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		if (wl_dst->window == wl_src->window)
 			return (0);
 
-		if (data->flags & CMD_KFLAG) {
+		if (data->chflags & CMD_CHFLAG('k')) {
 			/*
 			 * Can't use session_detach as it will destroy session
 			 * if this makes it empty.
@@ -75,7 +75,7 @@ cmd_move_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 
 			/* Force select/redraw if current. */
 			if (wl_dst == dst->curw) {
-				data->flags &= ~CMD_DFLAG;
+				data->chflags &= ~CMD_CHFLAG('d');
 				dst->curw = NULL;
 			}
 		}
@@ -100,7 +100,7 @@ cmd_move_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 			server_redraw_client(c);
 	}
 
-	if (data->flags & CMD_DFLAG)
+	if (data->chflags & CMD_CHFLAG('d'))
 		server_status_session(dst);
 	else {
 		session_select(dst, wl_dst->idx);

cmd-new-session.c

@@ -42,7 +42,7 @@ struct cmd_new_session_data {
 const struct cmd_entry cmd_new_session_entry = {
 	"new-session", "new",
 	"[-d] [-n window-name] [-s session-name] [command]",
-	CMD_STARTSERVER|CMD_CANTNEST,
+	CMD_STARTSERVER|CMD_CANTNEST, 0,
 	cmd_new_session_init,
 	cmd_new_session_parse,
 	cmd_new_session_exec,

cmd-new-window.c

@@ -45,7 +45,7 @@ struct cmd_new_window_data {
 const struct cmd_entry cmd_new_window_entry = {
 	"new-window", "neww",
 	"[-dk] [-n window-name] [-t target-window] [command]",
-	0,
+	0, 0,
 	cmd_new_window_init,
 	cmd_new_window_parse,
 	cmd_new_window_exec,

cmd-next-layout.c

@@ -29,7 +29,7 @@ int	cmd_next_layout_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_next_layout_entry = {
 	"next-layout", "nextl",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_next_layout_exec,

cmd-next-window.c

@@ -30,7 +30,7 @@ int	cmd_next_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_next_window_entry = {
 	"next-window", "next",
 	"[-a] " CMD_TARGET_SESSION_USAGE,
-	CMD_AFLAG,
+	0, CMD_CHFLAG('a'),
 	cmd_next_window_init,
 	cmd_target_parse,
 	cmd_next_window_exec,
@@ -49,7 +49,7 @@ cmd_next_window_init(struct cmd *self, int key)
 	data = self->data;
 
 	if (key == KEYC_ADDESC('n'))
-		data->flags |= CMD_AFLAG;
+		data->chflags |= CMD_CHFLAG('a');
 }
 
 int
@@ -63,7 +63,7 @@ cmd_next_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 
 	activity = 0;
-	if (data->flags & CMD_AFLAG)
+	if (data->chflags & CMD_CHFLAG('a'))
 		activity = 1;
 
 	if (session_next(s, activity) == 0)

cmd-paste-buffer.c

@@ -32,7 +32,7 @@ void	cmd_paste_buffer_lf2cr(struct buffer *, const char *, size_t);
 const struct cmd_entry cmd_paste_buffer_entry = {
 	"paste-buffer", "pasteb",
 	"[-dr] " CMD_BUFFER_WINDOW_USAGE,
-	CMD_DFLAG|CMD_RFLAG,
+	0, CMD_CHFLAG('d')|CMD_CHFLAG('r'),
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_paste_buffer_exec,
@@ -66,7 +66,7 @@ cmd_paste_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
 
 	if (pb != NULL && *pb->data != '\0') {
 		/* -r means raw data without LF->CR conversion. */
-		if (data->flags & CMD_RFLAG) {
+		if (data->chflags & CMD_CHFLAG('r')) {
 			buffer_write(
 			    w->active->out, pb->data, strlen(pb->data));
 		} else {
@@ -76,7 +76,7 @@ cmd_paste_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
 	}
 
 	/* Delete the buffer if -d. */
-	if (data->flags & CMD_DFLAG) {
+	if (data->chflags & CMD_CHFLAG('d')) {
 		if (data->buffer == -1)
 			paste_free_top(&s->buffers);
 		else

cmd-previous-layout.c

@@ -29,7 +29,7 @@ int	cmd_previous_layout_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_previous_layout_entry = {
 	"previous-layout", "prevl",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_previous_layout_exec,

cmd-previous-window.c

@@ -30,7 +30,7 @@ int	cmd_previous_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_previous_window_entry = {
 	"previous-window", "prev",
 	"[-a] " CMD_TARGET_SESSION_USAGE,
-	CMD_AFLAG,
+	0, CMD_CHFLAG('a'),
 	cmd_previous_window_init,
 	cmd_target_parse,
 	cmd_previous_window_exec,
@@ -49,7 +49,7 @@ cmd_previous_window_init(struct cmd *self, int key)
 	data = self->data;
 
 	if (key == KEYC_ADDESC('p'))
-		data->flags |= CMD_AFLAG;
+		data->chflags |= CMD_CHFLAG('a');
 }
 
 int
@@ -63,7 +63,7 @@ cmd_previous_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 
 	activity = 0;
-	if (data->flags & CMD_AFLAG)
+	if (data->chflags & CMD_CHFLAG('a'))
 		activity = 1;
 
 	if (session_previous(s, activity) == 0)

cmd-refresh-client.c

@@ -29,7 +29,7 @@ int	cmd_refresh_client_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_refresh_client_entry = {
 	"refresh-client", "refresh",
 	CMD_TARGET_CLIENT_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_refresh_client_exec,

cmd-rename-session.c

@@ -31,7 +31,7 @@ int	cmd_rename_session_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_rename_session_entry = {
 	"rename-session", "rename",
 	CMD_TARGET_SESSION_USAGE " new-name",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_rename_session_exec,

cmd-rename-window.c

@@ -31,7 +31,7 @@ int	cmd_rename_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_rename_window_entry = {
 	"rename-window", "renamew",
 	CMD_TARGET_WINDOW_USAGE " new-name",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_rename_window_exec,

cmd-resize-pane.c

@@ -32,7 +32,7 @@ int	cmd_resize_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_resize_pane_entry = {
 	"resize-pane", "resizep",
 	CMD_PANE_WINDOW_USAGE "[-DU] [adjustment]",
-	CMD_ARG01|CMD_BIGUFLAG|CMD_BIGDFLAG,
+	CMD_ARG01, CMD_CHFLAG('D')|CMD_CHFLAG('U'),
 	cmd_resize_pane_init,
 	cmd_pane_parse,
 	cmd_resize_pane_exec,
@@ -51,12 +51,12 @@ cmd_resize_pane_init(struct cmd *self, int key)
 	data = self->data;
 
 	if (key == KEYC_ADDCTL(KEYC_DOWN))
-		data->flags |= CMD_BIGDFLAG;
+		data->chflags |= CMD_CHFLAG('D');
 
 	if (key == KEYC_ADDESC(KEYC_UP))
 		data->arg = xstrdup("5");
 	if (key == KEYC_ADDESC(KEYC_DOWN)) {
-		data->flags |= CMD_BIGDFLAG;
+		data->chflags |= CMD_CHFLAG('D');
 		data->arg = xstrdup("5");
 	}
 }
@@ -92,7 +92,7 @@ cmd_resize_pane_exec(struct cmd *self, struct cmd_ctx *ctx)
 		}
 	}
 
-	if (!(data->flags & CMD_BIGDFLAG))
+	if (!(data->chflags & CMD_CHFLAG('D')))
 		adjust = -adjust;
 	if (layout_resize(wp, adjust) != 0) {
 		ctx->error(ctx, "layout %s "

cmd-respawn-window.c

@@ -31,7 +31,7 @@ int	cmd_respawn_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_respawn_window_entry = {
 	"respawn-window", "respawnw",
 	"[-k] " CMD_TARGET_WINDOW_USAGE " [command]",
-	CMD_ARG01|CMD_KFLAG,
+	CMD_ARG01, CMD_CHFLAG('k'),
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_respawn_window_exec,
@@ -56,7 +56,7 @@ cmd_respawn_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	w = wl->window;
 
-	if (!(data->flags & CMD_KFLAG)) {
+	if (!(data->chflags & CMD_CHFLAG('k'))) {
 		TAILQ_FOREACH(wp, &w->panes, entry) {
 			if (wp->fd == -1)
 				continue;

cmd-rotate-window.c

@@ -30,7 +30,7 @@ int	cmd_rotate_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_rotate_window_entry = {
 	"rotate-window", "rotatew",
 	"[-DU] " CMD_TARGET_WINDOW_USAGE,
-	CMD_BIGUFLAG|CMD_BIGDFLAG,
+	0, CMD_CHFLAG('D')|CMD_CHFLAG('U'),
 	cmd_rotate_window_init,
 	cmd_target_parse,
 	cmd_rotate_window_exec,
@@ -49,7 +49,7 @@ cmd_rotate_window_init(struct cmd *self, int key)
 	data = self->data;
 
 	if (key == KEYC_ADDESC('o'))
-		data->flags |= CMD_BIGDFLAG;
+		data->chflags |= CMD_CHFLAG('D');
 }
 
 int
@@ -66,7 +66,7 @@ cmd_rotate_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	w = wl->window;
 
-	if (data->flags & CMD_BIGDFLAG) {
+	if (data->chflags & CMD_CHFLAG('D')) {
 		wp = TAILQ_LAST(&w->panes, window_panes);
 		TAILQ_REMOVE(&w->panes, wp, entry);
 		TAILQ_INSERT_HEAD(&w->panes, wp, entry);

cmd-save-buffer.c

@@ -33,7 +33,7 @@ int	cmd_save_buffer_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_save_buffer_entry = {
 	"save-buffer", "saveb",
 	"[-a] " CMD_BUFFER_SESSION_USAGE " path",
-	CMD_AFLAG|CMD_ARG1,
+	CMD_ARG1, CMD_CHFLAG('a'),
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_save_buffer_exec,
@@ -68,7 +68,7 @@ cmd_save_buffer_exec(struct cmd *self, struct cmd_ctx *ctx)
 	}
 
 	mask = umask(S_IRWXG | S_IRWXO);
-	if (data->flags & CMD_AFLAG)
+	if (data->chflags & CMD_CHFLAG('a'))
 		f = fopen(data->arg, "ab");
 	else
 		f = fopen(data->arg, "wb");

cmd-scroll-mode.c

@@ -30,7 +30,7 @@ int	cmd_scroll_mode_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_scroll_mode_entry = {
 	"scroll-mode", NULL,
 	"[-u] " CMD_TARGET_WINDOW_USAGE,
-	CMD_UFLAG,
+	0, CMD_CHFLAG('u'),
 	cmd_scroll_mode_init,
 	cmd_target_parse,
 	cmd_scroll_mode_exec,
@@ -50,7 +50,7 @@ cmd_scroll_mode_init(struct cmd *self, int key)
 
 	switch (key) {
 	case KEYC_PPAGE:
-		data->flags |= CMD_UFLAG;
+		data->chflags |= CMD_CHFLAG('u');
 		break;
 	}
 }
@@ -67,7 +67,7 @@ cmd_scroll_mode_exec(struct cmd *self, struct cmd_ctx *ctx)
 	wp = wl->window->active;
 
 	window_pane_set_mode(wp, &window_scroll_mode);
-	if (wp->mode == &window_scroll_mode && data->flags & CMD_UFLAG)
+	if (wp->mode == &window_scroll_mode && data->chflags & CMD_CHFLAG('u'))
 		window_scroll_pageup(wp);
 
 	return (0);

cmd-select-layout.c

@@ -30,7 +30,7 @@ int	cmd_select_layout_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_select_layout_entry = {
 	"select-layout", "selectl",
 	CMD_TARGET_WINDOW_USAGE " layout-name",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_select_layout_init,
 	cmd_target_parse,
 	cmd_select_layout_exec,

cmd-select-pane.c

@@ -29,7 +29,7 @@ int	cmd_select_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_select_pane_entry = {
 	"select-pane", "selectp",
 	CMD_PANE_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_pane_init,
 	cmd_pane_parse,
 	cmd_select_pane_exec,

cmd-select-prompt.c

@@ -33,7 +33,7 @@ int	cmd_select_prompt_callback(void *, const char *);
 const struct cmd_entry cmd_select_prompt_entry = {
 	"select-prompt", NULL,
 	CMD_TARGET_CLIENT_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_select_prompt_exec,

cmd-select-window.c

@@ -32,7 +32,7 @@ int	cmd_select_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_select_window_entry = {
 	"select-window", "selectw",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_select_window_init,
 	cmd_target_parse,
 	cmd_select_window_exec,

cmd-send-keys.c

@@ -43,7 +43,7 @@ struct cmd_send_keys_data {
 const struct cmd_entry cmd_send_keys_entry = {
 	"send-keys", "send",
 	"[-t target-window] key ...",
-	0,
+	0, 0,
 	NULL,
 	cmd_send_keys_parse,
 	cmd_send_keys_exec,

cmd-send-prefix.c

@@ -29,7 +29,7 @@ int	cmd_send_prefix_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_send_prefix_entry = {
 	"send-prefix", NULL,
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_send_prefix_exec,

cmd-server-info.c

@@ -36,7 +36,7 @@ int	cmd_server_info_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_server_info_entry = {
 	"server-info", "info",
 	"",
-	0,
+	0, 0,
 	NULL,
 	NULL,
 	cmd_server_info_exec,

cmd-set-buffer.c

@@ -31,7 +31,7 @@ int	cmd_set_buffer_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_set_buffer_entry = {
 	"set-buffer", "setb",
 	CMD_BUFFER_SESSION_USAGE " data",
-	CMD_ARG1,
+	CMD_ARG1, 0,
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_set_buffer_exec,

cmd-set-option.c

@@ -32,7 +32,7 @@ int	cmd_set_option_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_set_option_entry = {
 	"set-option", "set",
 	CMD_OPTION_SESSION_USAGE,
-	CMD_GFLAG|CMD_UFLAG,
+	0, CMD_CHFLAG('g')|CMD_CHFLAG('u'),
 	NULL,
 	cmd_option_parse,
 	cmd_set_option_exec,
@@ -87,7 +87,7 @@ cmd_set_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 	const struct set_option_entry   *entry;
 	u_int				 i;
 
-	if (data->flags & CMD_GFLAG)
+	if (data->chflags & CMD_CHFLAG('g'))
 		oo = &global_s_options;
 	else {
 		if ((s = cmd_find_session(ctx, data->target)) == NULL)
@@ -120,8 +120,8 @@ cmd_set_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	}
 
-	if (data->flags & CMD_UFLAG) {
+	if (data->chflags & CMD_CHFLAG('u')) {
-		if (data->flags & CMD_GFLAG) {
+		if (data->chflags & CMD_CHFLAG('g')) {
 			ctx->error(ctx,
 			    "can't unset global option: %s", entry->name);
 			return (-1);

cmd-set-password.c

@@ -43,7 +43,7 @@ struct cmd_set_password_data {
 const struct cmd_entry cmd_set_password_entry = {
 	"set-password", "pass",
 	"[-c] password",
-	0,
+	0, 0,
 	cmd_set_password_init,
 	cmd_set_password_parse,
 	cmd_set_password_exec,

cmd-set-window-option.c

@@ -32,7 +32,7 @@ int	cmd_set_window_option_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_set_window_option_entry = {
 	"set-window-option", "setw",
 	CMD_OPTION_WINDOW_USAGE,
-	CMD_GFLAG|CMD_UFLAG,
+	0, CMD_CHFLAG('g')|CMD_CHFLAG('u'),
 	NULL,
 	cmd_option_parse,
 	cmd_set_window_option_exec,
@@ -81,7 +81,7 @@ cmd_set_window_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 	const struct set_option_entry   *entry;
 	u_int				 i;
 
-	if (data->flags & CMD_GFLAG)
+	if (data->chflags & CMD_CHFLAG('g'))
 		oo = &global_w_options;
 	else {
 		if ((wl = cmd_find_window(ctx, data->target, NULL)) == NULL)
@@ -114,8 +114,8 @@ cmd_set_window_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 		return (-1);
 	}
 
-	if (data->flags & CMD_UFLAG) {
+	if (data->chflags & CMD_CHFLAG('u')) {
-		if (data->flags & CMD_GFLAG) {
+		if (data->chflags & CMD_CHFLAG('g')) {
 			ctx->error(ctx,
 			    "can't unset global option: %s", entry->name);
 			return (-1);

cmd-show-buffer.c

@@ -31,7 +31,7 @@ int	cmd_show_buffer_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_show_buffer_entry = {
 	"show-buffer", "showb",
 	CMD_BUFFER_SESSION_USAGE,
-	0,
+	0, 0,
 	cmd_buffer_init,
 	cmd_buffer_parse,
 	cmd_show_buffer_exec,

cmd-show-options.c

@@ -32,7 +32,7 @@ int	cmd_show_options_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_show_options_entry = {
 	"show-options", "show",
 	"[-g] " CMD_TARGET_SESSION_USAGE,
-	CMD_GFLAG,
+	0, CMD_CHFLAG('g'),
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_show_options_exec,
@@ -53,7 +53,7 @@ cmd_show_options_exec(struct cmd *self, struct cmd_ctx *ctx)
 	char				*vs;
 	long long			 vn;
 
-	if (data->flags & CMD_GFLAG)
+	if (data->chflags & CMD_CHFLAG('g'))
 		oo = &global_s_options;
 	else {
 		if ((s = cmd_find_session(ctx, data->target)) == NULL)

cmd-show-window-options.c

@@ -32,7 +32,7 @@ int	cmd_show_window_options_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_show_window_options_entry = {
 	"show-window-options", "showw",
 	"[-g] " CMD_TARGET_WINDOW_USAGE,
-	CMD_GFLAG,
+	0, CMD_CHFLAG('g'),
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_show_window_options_exec,
@@ -53,7 +53,7 @@ cmd_show_window_options_exec(struct cmd *self, struct cmd_ctx *ctx)
 	char				*vs;
 	long long			 vn;
 
-	if (data->flags & CMD_GFLAG)
+	if (data->chflags & CMD_CHFLAG('g'))
 		oo = &global_w_options;
 	else {
 		if ((wl = cmd_find_window(ctx, data->target, NULL)) == NULL)

cmd-source-file.c

@@ -39,7 +39,7 @@ struct cmd_source_file_data {
 const struct cmd_entry cmd_source_file_entry = {
 	"source-file", "source",
 	"path",
-	0,
+	0, 0,
 	cmd_source_file_init,
 	cmd_source_file_parse,
 	cmd_source_file_exec,

cmd-split-window.c

@@ -46,7 +46,7 @@ struct cmd_split_window_data {
 const struct cmd_entry cmd_split_window_entry = {
 	"split-window", "splitw",
 	"[-d] [-p percentage|-l lines] [-t target-window] [command]",
-	0,
+	0, 0,
 	cmd_split_window_init,
 	cmd_split_window_parse,
 	cmd_split_window_exec,

cmd-start-server.c

@@ -29,7 +29,7 @@ int	cmd_start_server_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_start_server_entry = {
 	"start-server", "start",
 	"",
-	CMD_STARTSERVER,
+	CMD_STARTSERVER, 0,
 	NULL,
 	NULL,
 	cmd_start_server_exec,

cmd-suspend-client.c

@@ -37,7 +37,7 @@ struct cmd_suspend_client_data {
 const struct cmd_entry cmd_suspend_client_entry = {
 	"suspend-client", "suspendc",
 	"[-c target-client]",
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_suspend_client_exec,

cmd-swap-pane.c

@@ -46,7 +46,7 @@ struct cmd_swap_pane_data {
 const struct cmd_entry cmd_swap_pane_entry = {
 	"swap-pane", "swapp",
 	"[-dDU] [-t target-window] [-p src-index] [-q dst-index]",
-	0,
+	0, 0,
 	cmd_swap_pane_init,
 	cmd_swap_pane_parse,
 	cmd_swap_pane_exec,

cmd-swap-window.c

@@ -31,7 +31,7 @@ int	cmd_swap_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_swap_window_entry = {
 	"swap-window", "swapw",
 	"[-d] " CMD_SRCDST_WINDOW_USAGE,
-	CMD_DFLAG,
+	0, CMD_CHFLAG('d'),
 	cmd_srcdst_init,
 	cmd_srcdst_parse,
 	cmd_swap_window_exec,
@@ -61,7 +61,7 @@ cmd_swap_window_exec(struct cmd *self, struct cmd_ctx *ctx)
 	wl_dst->window = wl_src->window;
 	wl_src->window = w;
 
-	if (!(data->flags & CMD_DFLAG)) {
+	if (!(data->chflags & CMD_CHFLAG('d'))) {
 		session_select(dst, wl_dst->idx);
 		if (src != dst)
 			session_select(src, wl_src->idx);

cmd-switch-client.c

@@ -42,7 +42,7 @@ struct cmd_switch_client_data {
 const struct cmd_entry cmd_switch_client_entry = {
 	"switch-client", "switchc",
 	"[-c target-client] [-t target-session]",
-	0,
+	0, 0,
 	NULL,
 	cmd_switch_client_parse,
 	cmd_switch_client_exec,

cmd-unbind-key.c

@@ -37,7 +37,7 @@ struct cmd_unbind_key_data {
 const struct cmd_entry cmd_unbind_key_entry = {
 	"unbind-key", "unbind",
 	"key",
-	0,
+	0, 0,
 	NULL,
 	cmd_unbind_key_parse,
 	cmd_unbind_key_exec,

cmd-unlink-window.c

@@ -29,7 +29,7 @@ int	cmd_unlink_window_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_unlink_window_entry = {
 	"unlink-window", "unlinkw",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_unlink_window_exec,

cmd-up-pane.c

@@ -29,7 +29,7 @@ int	cmd_up_pane_exec(struct cmd *, struct cmd_ctx *);
 const struct cmd_entry cmd_up_pane_entry = {
 	"up-pane", "upp",
 	CMD_TARGET_WINDOW_USAGE,
-	0,
+	0, 0,
 	cmd_target_init,
 	cmd_target_parse,
 	cmd_up_pane_exec,

tmux.h

@@ -861,17 +861,13 @@ struct cmd_entry {
 #define CMD_CANTNEST 0x2
 #define CMD_ARG1 0x4
 #define CMD_ARG01 0x8
-#define CMD_AFLAG 0x10
-#define CMD_DFLAG 0x20
-#define CMD_GFLAG 0x40
-#define CMD_KFLAG 0x80
-#define CMD_UFLAG 0x100
-#define CMD_BIGDFLAG 0x200
-#define CMD_BIGUFLAG 0x400
-#define CMD_RFLAG 0x800
-
 	int		 flags;
 
+#define CMD_CHFLAG(flag) \
+	((flag) >= 'a' && (flag) <= 'z' ? 1ULL << ((flag) - 'a') :	\
+	(flag) >= 'A' && (flag) <= 'Z' ? 1ULL << (26 + (flag) - 'A') : 0)
+	uint64_t	 chflags;
+
 	void		 (*init)(struct cmd *, int);
 	int		 (*parse)(struct cmd *, int, char **, char **);
 	int		 (*exec)(struct cmd *, struct cmd_ctx *);
@@ -883,34 +879,34 @@ struct cmd_entry {
 
 /* Generic command data. */
 struct cmd_target_data {
-	int	 flags;
+	uint64_t chflags;
 	char	*target;
 	char	*arg;
 };
 
 struct cmd_srcdst_data {
-	int	 flags;
+	uint64_t chflags;
 	char	*src;
 	char	*dst;
 	char	*arg;
 };
 
 struct cmd_buffer_data {
-	int	 flags;
+	uint64_t chflags;
 	char	*target;
 	int	 buffer;
 	char	*arg;
 };
 
 struct cmd_option_data {
-	int	 flags;
+	uint64_t chflags;
 	char	*target;
 	char	*option;
 	char	*value;
 };
 
 struct cmd_pane_data {
-	int	 flags;
+	uint64_t chflags;
 	char	*target;
 	char	*arg;
 	int	 pane;