source: mainline/uspace/app/bdsh/cmds/builtin_cmds.c

/*
 * Copyright (c) 2008 Tim Post
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Almost identical (for now) to mod_cmds.c, however this will not be the case
 * soon as builtin_t is going to grow way beyond module_t
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <str.h>
#include "errors.h"
#include "cmds.h"
#include "builtin_aliases.h"
#include "scli.h"

extern volatile unsigned int cli_interactive;

int is_builtin(const char *command)
{
        builtin_t *cmd;
        unsigned int i = 0;

        if (NULL == command)
                return -2;

        for (cmd = builtins; cmd->name != NULL; cmd++, i++) {
                if (!str_cmp(cmd->name, command))
                        return i;
        }

        return -1;
}

int is_builtin_alias(const char *command)
{
        unsigned int i = 0;

        if (NULL == command)
                return -1;

        for (i = 0; builtin_aliases[i] != NULL; i += 2) {
                if (!str_cmp(builtin_aliases[i], command))
                        return 1;
        }

        return 0;
}

char *alias_for_builtin(const char *command)
{
        unsigned int i = 0;

        if (NULL == command)
                return (char *)NULL;

        for (i = 0; builtin_aliases[i] != NULL; i += 2) {
                if (!str_cmp(builtin_aliases[i], command))
                        return (char *)builtin_aliases[i + 1];
        }

        return (char *)NULL;
}

int help_builtin(int builtin, unsigned int extended)
{
        builtin_t *cmd = builtins;

        cmd += builtin;

        if (NULL != cmd->help) {
                cmd->help(extended);
                return CL_EOK;
        } else {
                return CL_ENOENT;
        }
}

int run_builtin(int builtin, char *argv[], cliuser_t *usr, iostate_t *new_iostate)
{
        int rc;
        builtin_t *cmd = builtins;

        cmd += builtin;

        iostate_t *old_iostate = get_iostate();
        set_iostate(new_iostate);

        if (NULL != cmd->entry) {
                rc = ((int)cmd->entry(argv, usr));
        } else {
                rc = CL_ENOENT;
        }

        set_iostate(old_iostate);

        return rc;
}