/* $OpenBSD$ */

/*
* Copyright (c) 2009 Nicholas Marriott <[email protected]>
*
* 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 environment variable.
*/

static enum cmd_retval  cmd_set_environment_exec(struct cmd *,
                           struct cmdq_item *);

const struct cmd_entry cmd_set_environment_entry = {
       .name = "set-environment",
       .alias = "setenv",

       .args = { "Fhgrt:u", 1, 2, NULL },
       .usage = "[-Fhgru] " CMD_TARGET_SESSION_USAGE " name [value]",

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

       .flags = CMD_AFTERHOOK,
       .exec = cmd_set_environment_exec
};

static enum cmd_retval
cmd_set_environment_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 environ          *env;
       const char              *name = args_string(args, 0), *value;
       const char              *tflag;
       char                    *expanded = NULL;
       enum cmd_retval          retval = CMD_RETURN_NORMAL;

       if (*name == '\0') {
               cmdq_error(item, "empty variable name");
               return (CMD_RETURN_ERROR);
       }
       if (strchr(name, '=') != NULL) {
               cmdq_error(item, "variable name contains =");
               return (CMD_RETURN_ERROR);
       }

       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;
       }
       if (args_has(args, 'g'))
               env = global_environ;
       else {
               if (target->s == NULL) {
                       tflag = args_get(args, 't');
                       if (tflag != NULL)
                               cmdq_error(item, "no such session: %s", tflag);
                       else
                               cmdq_error(item, "no current session");
                       retval = CMD_RETURN_ERROR;
                       goto out;
               }
               env = target->s->environ;
       }

       if (args_has(args, 'u')) {
               if (value != NULL) {
                       cmdq_error(item, "can't specify a value with -u");
                       retval = CMD_RETURN_ERROR;
                       goto out;
               }
               environ_unset(env, name);
       } else if (args_has(args, 'r')) {
               if (value != NULL) {
                       cmdq_error(item, "can't specify a value with -r");
                       retval = CMD_RETURN_ERROR;
                       goto out;
               }
               environ_clear(env, name);
       } else {
               if (value == NULL) {
                       cmdq_error(item, "no value specified");
                       retval = CMD_RETURN_ERROR;
                       goto out;
               }

               if (args_has(args, 'h'))
                       environ_set(env, name, ENVIRON_HIDDEN, "%s", value);
               else
                       environ_set(env, name, 0, "%s", value);
       }

out:
       free(expanded);
       return (retval);
}