/* $OpenBSD: cmd-set-option.c,v 1.146 2026/07/10 15:20:06 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include <sys/types.h>

#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
 * Set an option.
 */

static enum args_parse_type     cmd_set_option_args_parse(struct args *,
                                    u_int, char **);
static enum cmd_retval          cmd_set_option_exec(struct cmd *,
                                    struct cmdq_item *);
static enum cmd_retval          cmd_set_hook_event_exec(struct cmd *,
                                    struct cmdq_item *);
static enum cmd_retval          cmd_set_hook_monitor_exec(struct cmdq_item *,
                                    struct args *, int);

const struct cmd_entry cmd_set_option_entry = {
        .name = "set-option",
        .alias = "set",

        .args = { "aFgopqst:uUw", 1, 2, cmd_set_option_args_parse },
        .usage = "[-aFgopqsuUw] " CMD_TARGET_PANE_USAGE " option [value]",

        .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

const struct cmd_entry cmd_set_window_option_entry = {
        .name = "set-window-option",
        .alias = "setw",

        .args = { "aFgoqt:u", 1, 2, cmd_set_option_args_parse },
        .usage = "[-aFgoqu] " CMD_TARGET_WINDOW_USAGE " option [value]",

        .target = { 't', CMD_FIND_WINDOW, CMD_FIND_CANFAIL },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

const struct cmd_entry cmd_set_hook_entry = {
        .name = "set-hook",
        .alias = NULL,

        .args = { "agpERTt:uB:w", 0, 2, cmd_set_option_args_parse },
        .usage = "[-agpERTuw] [-B name:what:format] " CMD_TARGET_PANE_USAGE " "
                 "[hook] [command]",

        .target = { 't', CMD_FIND_PANE, CMD_FIND_CANFAIL },

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_option_exec
};

static enum args_parse_type
cmd_set_option_args_parse(struct args *args, u_int idx,
    __unused char **cause)
{
        if (args_has(args, 'B'))
                return (ARGS_PARSE_COMMANDS_OR_STRING);
        if (idx == 1)
                return (ARGS_PARSE_COMMANDS_OR_STRING);
        return (ARGS_PARSE_STRING);
}

static enum cmd_retval
cmd_set_hook_event_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct cmd_find_state   *target = cmdq_get_target(item);
        struct event_payload    *ep;
        struct client           *c;
        char                    *argument;

        if (args_count(args) == 0) {
                cmdq_error(item, "missing argument");
                return (CMD_RETURN_ERROR);
        }
        if (args_count(args) != 1) {
                cmdq_error(item, "too many arguments");
                return (CMD_RETURN_ERROR);
        }

        argument = format_single_from_target(item, args_string(args, 0));
        if (*argument != '@') {
                cmdq_error(item, "event name must start with @");
                free(argument);
                return (CMD_RETURN_ERROR);
        }

        ep = event_payload_create();
        event_payload_set_target(ep, target);
        c = cmdq_get_client(item);
        if (c != NULL)
                event_payload_set_client(ep, "client", c);
        if (target->s != NULL)
                event_payload_set_session(ep, "session", target->s);
        if (target->w != NULL)
                event_payload_set_window(ep, "window", target->w);
        if (target->wl != NULL)
                event_payload_set_int(ep, "window_index", target->wl->idx);
        else if (target->idx != -1)
                event_payload_set_int(ep, "window_index", target->idx);
        if (target->wp != NULL)
                event_payload_set_pane(ep, "pane", target->wp);
        events_fire(argument, ep);
        free(argument);
        return (CMD_RETURN_NORMAL);
}

static enum cmd_retval
cmd_set_hook_monitor_exec(struct cmdq_item *item, struct args *args, int window)
{
        struct cmd_find_state   *target = cmdq_get_target(item), fs;
        struct options          *oo;
        struct options_entry    *o;
        struct session          *s = NULL;
        char                    *cause = NULL, *name = NULL, *format = NULL;
        char                    *expanded = NULL, *newvalue = NULL;
        const char              *value, *old;
        enum monitor_type        type;
        int                      id, scope, flags = 0;

        if (args_count(args) > 1) {
                cmdq_error(item, "too many arguments");
                return (CMD_RETURN_ERROR);
        }

        value = args_get(args, 'B');
        if (args_has(args, 'u')) {
                if (monitor_parse(value, &name, &type, &id, &format) != 0)
                        name = xstrdup(value);
                free(format);
                format = NULL;
        } else {
                if (monitor_parse(value, &name, &type, &id, &format) != 0) {
                        cmdq_error(item, "invalid subscription: %s", value);
                        return (CMD_RETURN_ERROR);
                }
        }

        if (*name != '@') {
                cmdq_error(item, "monitor hook name must start with @");
                goto fail;
        }

        scope = options_scope_from_name(args, window, name, target, &oo,
            &cause);
        if (scope == OPTIONS_TABLE_NONE) {
                cmdq_error(item, "%s", cause);
                free(cause);
                goto fail;
        }
        cmd_find_copy_state(&fs, target);

        if (args_has(args, 'u')) {
                hooks_monitor_remove(oo, name);
                goto out;
        }

        if (args_count(args) != 0) {
                value = args_string(args, 0);
                if (args_has(args, 'F')) {
                        expanded = format_single_from_target(item, value);
                        value = expanded;
                }
                o = options_get_only(oo, name);
                if (!args_has(args, 'o') || o == NULL) {
                        if (args_has(args, 'a') && o != NULL) {
                                old = options_get_string(oo, name);
                                xasprintf(&newvalue, "%s%s", old, value);
                                value = newvalue;
                        }
                        options_set_string(oo, name, 0, "%s", value);
                        options_push_changes(name);
                }
        }

        if (oo != global_options &&
            oo != global_s_options &&
            oo != global_w_options)
                s = target->s;
        if (args_has(args, 'T'))
                flags |= MONITOR_NOTIFY_TRUE;
        hooks_monitor_add(item, oo, name, type, id, format, flags, &fs, s);

out:
        free(newvalue);
        free(expanded);
        free(name);
        free(format);
        return (CMD_RETURN_NORMAL);

fail:
        free(newvalue);
        free(expanded);
        free(name);
        free(format);
        return (CMD_RETURN_ERROR);
}

static enum cmd_retval
cmd_set_option_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args                     *args = cmd_get_args(self);
        int                              append = args_has(args, 'a');
        struct cmd_find_state           *target = cmdq_get_target(item);
        struct window_pane              *loop;
        struct options                  *oo;
        struct options_entry            *parent, *o, *po;
        char                            *name, *argument, *cause;
        char                            *expanded = NULL, *array_key = NULL;
        const char                      *value;
        int                              window, already, error, ambiguous;
        int                              scope;

        window = (cmd_get_entry(self) == &cmd_set_window_option_entry);
        if (cmd_get_entry(self) == &cmd_set_hook_entry && args_has(args, 'E'))
                return (cmd_set_hook_event_exec(self, item));
        if (cmd_get_entry(self) == &cmd_set_hook_entry && args_has(args, 'B'))
                return (cmd_set_hook_monitor_exec(item, args, window));
        if (args_count(args) == 0) {
                cmdq_error(item, "missing argument");
                return (CMD_RETURN_ERROR);
        }

        /* Expand argument. */
        argument = format_single_from_target(item, args_string(args, 0));

        /* If set-hook -R, fire the hook straight away. */
        if (cmd_get_entry(self) == &cmd_set_hook_entry && args_has(args, 'R')) {
                hooks_run(item, argument);
                free(argument);
                return (CMD_RETURN_NORMAL);
        }

        /* Parse option name and array key. */
        name = options_match(argument, &array_key, &ambiguous);
        if (name == NULL) {
                if (args_has(args, 'q'))
                        goto out;
                if (ambiguous)
                        cmdq_error(item, "ambiguous option: %s", argument);
                else
                        cmdq_error(item, "invalid option: %s", argument);
                goto fail;
        }
        if (args_count(args) < 2)
                value = NULL;
        else
                value = args_string(args, 1);
        if (value != NULL && args_has(args, 'F')) {
                expanded = format_single_from_target(item, value);
                value = expanded;
        }

        /* Get the scope and table for the option .*/
        scope = options_scope_from_name(args, window, name, target, &oo,
            &cause);
        if (scope == OPTIONS_TABLE_NONE) {
                if (args_has(args, 'q'))
                        goto out;
                cmdq_error(item, "%s", cause);
                free(cause);
                goto fail;
        }
        o = options_get_only(oo, name);
        parent = options_get(oo, name);

        /* Check that array options and keys match up. */
        if (array_key != NULL && (*name == '@' || !options_is_array(parent))) {
                cmdq_error(item, "not an array: %s", argument);
                goto fail;
        }

        /* With -o, check this option is not already set. */
        if (!args_has(args, 'u') && args_has(args, 'o')) {
                if (array_key == NULL)
                        already = (o != NULL);
                else {
                        if (o == NULL)
                                already = 0;
                        else if (options_array_get(o, array_key) != NULL)
                                already = 1;
                        else
                                already = 0;
                }
                if (already) {
                        if (args_has(args, 'q'))
                                goto out;
                        cmdq_error(item, "already set: %s", argument);
                        goto fail;
                }
        }

        /* Change the option. */
        if (args_has(args, 'U') && scope == OPTIONS_TABLE_WINDOW) {
                TAILQ_FOREACH(loop, &target->w->panes, entry) {
                        po = options_get_only(loop->options, name);
                        if (po == NULL)
                                continue;
                        if (options_remove_or_default(po, array_key,
                            &cause) != 0) {
                                cmdq_error(item, "%s", cause);
                                free(cause);
                                goto fail;
                        }
                }
        }
        if (args_has(args, 'u') || args_has(args, 'U')) {
                if (o == NULL)
                        goto out;
                if (options_remove_or_default(o, array_key, &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        } else if (*name == '@') {
                if (value == NULL) {
                        cmdq_error(item, "empty value");
                        goto fail;
                }
                options_set_string(oo, name, append, "%s", value);
                if (cmd_get_entry(self) == &cmd_set_hook_entry)
                        hooks_add_event(name);
        } else if (array_key == NULL && !options_is_array(parent)) {
                error = options_from_string(oo, options_table_entry(parent),
                    options_table_entry(parent)->name, value,
                    args_has(args, 'a'), &cause);
                if (error != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        } else {
                if (value == NULL) {
                        cmdq_error(item, "empty value");
                        goto fail;
                }
                if (o == NULL)
                        o = options_empty(oo, options_table_entry(parent));
                if (array_key == NULL) {
                        if (!append)
                                options_array_clear(o);
                        if (options_array_assign(o, value, &cause) != 0) {
                                cmdq_error(item, "%s", cause);
                                free(cause);
                                goto fail;
                        }
                } else if (options_array_set(o, array_key, value, append,
                    &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        free(cause);
                        goto fail;
                }
        }

        options_push_changes(name);

out:
        free(argument);
        free(expanded);
        free(name);
        free(array_key);
        return (CMD_RETURN_NORMAL);

fail:
        free(argument);
        free(expanded);
        free(name);
        free(array_key);
        return (CMD_RETURN_ERROR);
}