cmd-set-option.c - tmux - Rivoreo Source Code Repositories

 /* $Id: cmd-set-option.c,v 1.108 2011-02-15 15:20:03 tcunha Exp $ */

 /*
  * Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
  *
  * 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 <stdlib.h>
 #include <string.h>

 #include "tmux.h"

 /*
  * Set an option.
  */

 int	cmd_set_option_exec(struct cmd *, struct cmd_ctx *);

 int	cmd_set_option_unset(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 int	cmd_set_option_set(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);

 struct options_entry *cmd_set_option_string(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_number(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_keys(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_colour(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_attributes(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_flag(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
 struct options_entry *cmd_set_option_choice(struct cmd *, struct cmd_ctx *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);

 const struct cmd_entry cmd_set_option_entry = {
 	"set-option", "set",
 	"agst:uw", 1, 2,
 	"[-agsuw] [-t target-session|target-window] option [value]",
 	0,
 	NULL,
 	NULL,
 	cmd_set_option_exec
 };

 const struct cmd_entry cmd_set_window_option_entry = {
 	"set-window-option", "setw",
 	"agt:u", 1, 2,
 	"[-agu] " CMD_TARGET_WINDOW_USAGE " option [value]",
 	0,
 	NULL,
 	NULL,
 	cmd_set_option_exec
 };

 int
 cmd_set_option_exec(struct cmd *self, struct cmd_ctx *ctx)
 {
 	struct args				*args = self->args;
 	const struct options_table_entry	*table, *oe, *oe_loop;
 	struct session				*s;
 	struct winlink				*wl;
 	struct client				*c;
 	struct options				*oo;
 	const char				*optstr, *valstr;
 	u_int					 i;

 	/* Work out the options tree and table to use. */
 	if (args_has(self->args, 's')) {
 		oo = &global_options;
 		table = server_options_table;
 	} else if (args_has(self->args, 'w') ||
 	    self->entry == &cmd_set_window_option_entry) {
 		table = window_options_table;
 		if (args_has(self->args, 'g'))
 			oo = &global_w_options;
 		else {
 			wl = cmd_find_window(ctx, args_get(args, 't'), NULL);
 			if (wl == NULL)
 				return (-1);
 			oo = &wl->window->options;
 		}
 	} else {
 		table = session_options_table;
 		if (args_has(self->args, 'g'))
 			oo = &global_s_options;
 		else {
 			s = cmd_find_session(ctx, args_get(args, 't'));
 			if (s == NULL)
 				return (-1);
 			oo = &s->options;
 		}
 	}

 	/* Get the option name and value. */
 	optstr = args->argv[0];
 	if (*optstr == '\0') {
 		ctx->error(ctx, "invalid option");
 		return (-1);
 	}
 	if (args->argc < 2)
 		valstr = NULL;
 	else
 		valstr = args->argv[1];

 	/* Find the option table entry. */
 	oe = NULL;
 	for (oe_loop = table; oe_loop->name != NULL; oe_loop++) {
 		if (strncmp(oe_loop->name, optstr, strlen(optstr)) != 0)
 			continue;

 		if (oe != NULL) {
 			ctx->error(ctx, "ambiguous option: %s", optstr);
 			return (-1);
 		}
 		oe = oe_loop;

 		/* Bail now if an exact match. */
 		if (strcmp(oe->name, optstr) == 0)
 			break;
 	}
 	if (oe == NULL) {
 		ctx->error(ctx, "unknown option: %s", optstr);
 		return (-1);
 	}

 	/* Unset or set the option. */
 	if (args_has(args, 'u')) {
 		if (cmd_set_option_unset(self, ctx, oe, oo, valstr) != 0)
 			return (-1);
 	} else {
 		if (cmd_set_option_set(self, ctx, oe, oo, valstr) != 0)
 			return (-1);
 	}

 	/* Update sizes and redraw. May not need it but meh. */
 	recalculate_sizes();
 	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 		c = ARRAY_ITEM(&clients, i);
 		if (c != NULL && c->session != NULL)
 			server_redraw_client(c);
 	}

 	/*
 	 * Special-case: kill all persistent jobs if status-left, status-right
 	 * or set-titles-string have changed. Persistent jobs are only used by
 	 * the status line at the moment so this works XXX.
 	 */
 	if (strcmp(oe->name, "status-left") == 0 ||
 	    strcmp(oe->name, "status-right") == 0 ||
 	    strcmp(oe->name, "status") == 0 ||
 	    strcmp(oe->name, "set-titles-string") == 0 ||
 	    strcmp(oe->name, "window-status-format") == 0) {
 		for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
 			c = ARRAY_ITEM(&clients, i);
 			if (c != NULL && c->session != NULL)
 				server_redraw_client(c);
 		}
 	}

 	return (0);
 }

 /* Unset an option. */
 int
 cmd_set_option_unset(struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	struct args	*args = self->args;

 	if (args_has(args, 'g')) {
 		ctx->error(ctx, "can't unset global option: %s", oe->name);
 		return (-1);
 	}
 	if (value != NULL) {
 		ctx->error(ctx, "value passed to unset option: %s", oe->name);
 		return (-1);
 	}

 	options_remove(oo, oe->name);
 	ctx->info(ctx, "unset option: %s", oe->name);
 	return (0);
 }

 /* Set an option. */
 int
 cmd_set_option_set(struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	struct options_entry	*o;
 	const char		*s;

 	if (oe->type != OPTIONS_TABLE_FLAG && value == NULL) {
 		ctx->error(ctx, "empty value");
 		return (-1);
 	}

 	o = NULL;
 	switch (oe->type) {
 	case OPTIONS_TABLE_STRING:
 		o = cmd_set_option_string(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_NUMBER:
 		o = cmd_set_option_number(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_KEYS:
 		o = cmd_set_option_keys(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_COLOUR:
 		o = cmd_set_option_colour(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_ATTRIBUTES:
 		o = cmd_set_option_attributes(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_FLAG:
 		o = cmd_set_option_flag(self, ctx, oe, oo, value);
 		break;
 	case OPTIONS_TABLE_CHOICE:
 		o = cmd_set_option_choice(self, ctx, oe, oo, value);
 		break;
 	}
 	if (o == NULL)
 		return (-1);

 	s = options_table_print_entry(oe, o);
 	ctx->info(ctx, "set option: %s -> %s", oe->name, s);
 	return (0);
 }

 /* Set a string option. */
 struct options_entry *
 cmd_set_option_string(struct cmd *self, unused struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	struct args	*args = self->args;
 	struct options_entry	*o;
 	char			*oldval, *newval;

 	if (args_has(args, 'a')) {
 		oldval = options_get_string(oo, oe->name);
 		xasprintf(&newval, "%s%s", oldval, value);
 	} else
 		newval = xstrdup(value);

 	o = options_set_string(oo, oe->name, "%s", newval);

 	xfree(newval);
 	return (o);
 }

 /* Set a number option. */
 struct options_entry *
 cmd_set_option_number(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	long long	 ll;
 	const char     	*errstr;

 	ll = strtonum(value, oe->minimum, oe->maximum, &errstr);
 	if (errstr != NULL) {
 		ctx->error(ctx, "value is %s: %s", errstr, value);
 		return (NULL);
 	}

 	return (options_set_number(oo, oe->name, ll));
 }

 /* Set a keys option. */
 struct options_entry *
 cmd_set_option_keys(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	struct keylist	*keylist;
 	char		*copy, *ptr, *s;
 	int		 key;

 	keylist = xmalloc(sizeof *keylist);
 	ARRAY_INIT(keylist);

 	ptr = copy = xstrdup(value);
 	while ((s = strsep(&ptr, ",")) != NULL) {
 		if ((key = key_string_lookup_string(s)) == KEYC_NONE) {
 			ctx->error(ctx, "unknown key: %s", s);
 			xfree(copy);
 			xfree(keylist);
 			return (NULL);
 		}
 		ARRAY_ADD(keylist, key);
 	}
 	xfree(copy);

 	return (options_set_data(oo, oe->name, keylist, xfree));
 }

 /* Set a colour option. */
 struct options_entry *
 cmd_set_option_colour(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	int	colour;

 	if ((colour = colour_fromstring(value)) == -1) {
 		ctx->error(ctx, "bad colour: %s", value);
 		return (NULL);
 	}

 	return (options_set_number(oo, oe->name, colour));
 }

 /* Set an attributes option. */
 struct options_entry *
 cmd_set_option_attributes(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	int	attr;

 	if ((attr = attributes_fromstring(value)) == -1) {
 		ctx->error(ctx, "bad attributes: %s", value);
 		return (NULL);
 	}

 	return (options_set_number(oo, oe->name, attr));
 }

 /* Set a flag option. */
 struct options_entry *
 cmd_set_option_flag(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	int	flag;

 	if (value == NULL || *value == '\0')
 		flag = !options_get_number(oo, oe->name);
 	else {
 		if ((value[0] == '1' && value[1] == '\0') ||
 		    strcasecmp(value, "on") == 0 ||
 		    strcasecmp(value, "yes") == 0)
 			flag = 1;
 		else if ((value[0] == '0' && value[1] == '\0') ||
 		    strcasecmp(value, "off") == 0 ||
 		    strcasecmp(value, "no") == 0)
 			flag = 0;
 		else {
 			ctx->error(ctx, "bad value: %s", value);
 			return (NULL);
 		}
 	}

 	return (options_set_number(oo, oe->name, flag));
 }

 /* Set a choice option. */
 struct options_entry *
 cmd_set_option_choice(unused struct cmd *self, struct cmd_ctx *ctx,
     const struct options_table_entry *oe, struct options *oo, const char *value)
 {
 	const char	**choicep;
 	int		  n, choice = -1;

 	n = 0;
 	for (choicep = oe->choices; *choicep != NULL; choicep++) {
 		n++;
 		if (strncmp(*choicep, value, strlen(value)) != 0)
 			continue;

 		if (choice != -1) {
 			ctx->error(ctx, "ambiguous value: %s", value);
 			return (NULL);
 		}
 		choice = n - 1;
 	}
 	if (choice == -1) {
 		ctx->error(ctx, "unknown value: %s", value);
 		return (NULL);
 	}

 	return (options_set_number(oo, oe->name, choice));
 }
	/* $Id: cmd-set-option.c,v 1.108 2011-02-15 15:20:03 tcunha Exp $ */

	/*
	* Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
	*
	* 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 <stdlib.h>
	#include <string.h>

	#include "tmux.h"

	/*
	* Set an option.
	*/

	int cmd_set_option_exec(struct cmd , struct cmd_ctx );

	int cmd_set_option_unset(struct cmd , struct cmd_ctx ,
	const struct options_table_entry , struct options ,
	const char *);
	int cmd_set_option_set(struct cmd , struct cmd_ctx ,
	const struct options_table_entry , struct options ,
	const char *);

	struct options_entry cmd_set_option_string(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_number(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_keys(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_colour(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_attributes(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_flag(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);
	struct options_entry cmd_set_option_choice(struct cmd , struct cmd_ctx *,
	const struct options_table_entry , struct options ,
	const char *);

	const struct cmd_entry cmd_set_option_entry = {
	"set-option", "set",
	"agst:uw", 1, 2,
	"[-agsuw] [-t target-session\|target-window] option [value]",
	0,
	NULL,
	NULL,
	cmd_set_option_exec
	};

	const struct cmd_entry cmd_set_window_option_entry = {
	"set-window-option", "setw",
	"agt:u", 1, 2,
	"[-agu] " CMD_TARGET_WINDOW_USAGE " option [value]",
	0,
	NULL,
	NULL,
	cmd_set_option_exec
	};

	int
	cmd_set_option_exec(struct cmd self, struct cmd_ctx ctx)
	{
	struct args *args = self->args;
	const struct options_table_entry table, oe, *oe_loop;
	struct session *s;
	struct winlink *wl;
	struct client *c;
	struct options *oo;
	const char optstr, valstr;
	u_int i;

	/* Work out the options tree and table to use. */
	if (args_has(self->args, 's')) {
	oo = &global_options;
	table = server_options_table;
	} else if (args_has(self->args, 'w') \|\|
	self->entry == &cmd_set_window_option_entry) {
	table = window_options_table;
	if (args_has(self->args, 'g'))
	oo = &global_w_options;
	else {
	wl = cmd_find_window(ctx, args_get(args, 't'), NULL);
	if (wl == NULL)
	return (-1);
	oo = &wl->window->options;
	}
	} else {
	table = session_options_table;
	if (args_has(self->args, 'g'))
	oo = &global_s_options;
	else {
	s = cmd_find_session(ctx, args_get(args, 't'));
	if (s == NULL)
	return (-1);
	oo = &s->options;
	}
	}

	/* Get the option name and value. */
	optstr = args->argv[0];
	if (*optstr == '\0') {
	ctx->error(ctx, "invalid option");
	return (-1);
	}
	if (args->argc < 2)
	valstr = NULL;
	else
	valstr = args->argv[1];

	/* Find the option table entry. */
	oe = NULL;
	for (oe_loop = table; oe_loop->name != NULL; oe_loop++) {
	if (strncmp(oe_loop->name, optstr, strlen(optstr)) != 0)
	continue;

	if (oe != NULL) {
	ctx->error(ctx, "ambiguous option: %s", optstr);
	return (-1);
	}
	oe = oe_loop;

	/* Bail now if an exact match. */
	if (strcmp(oe->name, optstr) == 0)
	break;
	}
	if (oe == NULL) {
	ctx->error(ctx, "unknown option: %s", optstr);
	return (-1);
	}

	/* Unset or set the option. */
	if (args_has(args, 'u')) {
	if (cmd_set_option_unset(self, ctx, oe, oo, valstr) != 0)
	return (-1);
	} else {
	if (cmd_set_option_set(self, ctx, oe, oo, valstr) != 0)
	return (-1);
	}

	/* Update sizes and redraw. May not need it but meh. */
	recalculate_sizes();
	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c != NULL && c->session != NULL)
	server_redraw_client(c);
	}

	/*
	* Special-case: kill all persistent jobs if status-left, status-right
	* or set-titles-string have changed. Persistent jobs are only used by
	* the status line at the moment so this works XXX.
	*/
	if (strcmp(oe->name, "status-left") == 0 \|\|
	strcmp(oe->name, "status-right") == 0 \|\|
	strcmp(oe->name, "status") == 0 \|\|
	strcmp(oe->name, "set-titles-string") == 0 \|\|
	strcmp(oe->name, "window-status-format") == 0) {
	for (i = 0; i < ARRAY_LENGTH(&clients); i++) {
	c = ARRAY_ITEM(&clients, i);
	if (c != NULL && c->session != NULL)
	server_redraw_client(c);
	}
	}

	return (0);
	}

	/* Unset an option. */
	int
	cmd_set_option_unset(struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	struct args *args = self->args;

	if (args_has(args, 'g')) {
	ctx->error(ctx, "can't unset global option: %s", oe->name);
	return (-1);
	}
	if (value != NULL) {
	ctx->error(ctx, "value passed to unset option: %s", oe->name);
	return (-1);
	}

	options_remove(oo, oe->name);
	ctx->info(ctx, "unset option: %s", oe->name);
	return (0);
	}

	/* Set an option. */
	int
	cmd_set_option_set(struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	struct options_entry *o;
	const char *s;

	if (oe->type != OPTIONS_TABLE_FLAG && value == NULL) {
	ctx->error(ctx, "empty value");
	return (-1);
	}

	o = NULL;
	switch (oe->type) {
	case OPTIONS_TABLE_STRING:
	o = cmd_set_option_string(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_NUMBER:
	o = cmd_set_option_number(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_KEYS:
	o = cmd_set_option_keys(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_COLOUR:
	o = cmd_set_option_colour(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_ATTRIBUTES:
	o = cmd_set_option_attributes(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_FLAG:
	o = cmd_set_option_flag(self, ctx, oe, oo, value);
	break;
	case OPTIONS_TABLE_CHOICE:
	o = cmd_set_option_choice(self, ctx, oe, oo, value);
	break;
	}
	if (o == NULL)
	return (-1);

	s = options_table_print_entry(oe, o);
	ctx->info(ctx, "set option: %s -> %s", oe->name, s);
	return (0);
	}

	/* Set a string option. */
	struct options_entry *
	cmd_set_option_string(struct cmd self, unused struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	struct args *args = self->args;
	struct options_entry *o;
	char oldval, newval;

	if (args_has(args, 'a')) {
	oldval = options_get_string(oo, oe->name);
	xasprintf(&newval, "%s%s", oldval, value);
	} else
	newval = xstrdup(value);

	o = options_set_string(oo, oe->name, "%s", newval);

	xfree(newval);
	return (o);
	}

	/* Set a number option. */
	struct options_entry *
	cmd_set_option_number(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	long long ll;
	const char *errstr;

	ll = strtonum(value, oe->minimum, oe->maximum, &errstr);
	if (errstr != NULL) {
	ctx->error(ctx, "value is %s: %s", errstr, value);
	return (NULL);
	}

	return (options_set_number(oo, oe->name, ll));
	}

	/* Set a keys option. */
	struct options_entry *
	cmd_set_option_keys(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	struct keylist *keylist;
	char copy, ptr, *s;
	int key;

	keylist = xmalloc(sizeof *keylist);
	ARRAY_INIT(keylist);

	ptr = copy = xstrdup(value);
	while ((s = strsep(&ptr, ",")) != NULL) {
	if ((key = key_string_lookup_string(s)) == KEYC_NONE) {
	ctx->error(ctx, "unknown key: %s", s);
	xfree(copy);
	xfree(keylist);
	return (NULL);
	}
	ARRAY_ADD(keylist, key);
	}
	xfree(copy);

	return (options_set_data(oo, oe->name, keylist, xfree));
	}

	/* Set a colour option. */
	struct options_entry *
	cmd_set_option_colour(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	int colour;

	if ((colour = colour_fromstring(value)) == -1) {
	ctx->error(ctx, "bad colour: %s", value);
	return (NULL);
	}

	return (options_set_number(oo, oe->name, colour));
	}

	/* Set an attributes option. */
	struct options_entry *
	cmd_set_option_attributes(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	int attr;

	if ((attr = attributes_fromstring(value)) == -1) {
	ctx->error(ctx, "bad attributes: %s", value);
	return (NULL);
	}

	return (options_set_number(oo, oe->name, attr));
	}

	/* Set a flag option. */
	struct options_entry *
	cmd_set_option_flag(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	int flag;

	if (value == NULL \|\| *value == '\0')
	flag = !options_get_number(oo, oe->name);
	else {
	if ((value[0] == '1' && value[1] == '\0') \|\|
	strcasecmp(value, "on") == 0 \|\|
	strcasecmp(value, "yes") == 0)
	flag = 1;
	else if ((value[0] == '0' && value[1] == '\0') \|\|
	strcasecmp(value, "off") == 0 \|\|
	strcasecmp(value, "no") == 0)
	flag = 0;
	else {
	ctx->error(ctx, "bad value: %s", value);
	return (NULL);
	}
	}

	return (options_set_number(oo, oe->name, flag));
	}

	/* Set a choice option. */
	struct options_entry *
	cmd_set_option_choice(unused struct cmd self, struct cmd_ctx ctx,
	const struct options_table_entry oe, struct options oo, const char *value)
	{
	const char **choicep;
	int n, choice = -1;

	n = 0;
	for (choicep = oe->choices; *choicep != NULL; choicep++) {
	n++;
	if (strncmp(*choicep, value, strlen(value)) != 0)
	continue;

	if (choice != -1) {
	ctx->error(ctx, "ambiguous value: %s", value);
	return (NULL);
	}
	choice = n - 1;
	}
	if (choice == -1) {
	ctx->error(ctx, "unknown value: %s", value);
	return (NULL);
	}

	return (options_set_number(oo, oe->name, choice));
	}