util.c

/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> - 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.
 *
 * Neither the name of the original program's authors nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT OWNER OR CONTRIBUTORS 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.
 */

#include <stdio.h>
#include <str.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdarg.h>

#include "config.h"
#include "errors.h"
#include "util.h"

extern volatile int cli_errno;

/* Count and return the # of elements in an array */
unsigned int cli_count_args(char **args)
{
        unsigned int i;

        for (i=0; args[i] != NULL; i++);
        return i;
}

/* (re)allocates memory to store the current working directory, gets
 * and updates the current working directory, formats the prompt
 * string */
unsigned int cli_set_prompt(cliuser_t *usr)
{
        usr->cwd = (char *) realloc(usr->cwd, PATH_MAX);
        if (NULL == usr->cwd) {
                cli_error(CL_ENOMEM, "Can not allocate cwd");
                cli_errno = CL_ENOMEM;
                return 1;
        }
        if (!getcwd(usr->cwd, PATH_MAX)) 
                snprintf(usr->cwd, PATH_MAX, "(unknown)");

        if (usr->prompt)
                free(usr->prompt);
        asprintf(&usr->prompt, "%s # ", usr->cwd);

        return 0;
}

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