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3265 post 1
/* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions are met:
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 *
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 * Redistributions of source code must retain the above copyright notice, this
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 * list of conditions and the following disclaimer.
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 *
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 * Redistributions in binary form must reproduce the above copyright notice,
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 * this list of conditions and the following disclaimer in the documentation
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 * and/or other materials provided with the distribution.
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 *
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 * Neither the name of the original program's authors nor the names of its
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 * contributors may be used to endorse or promote products derived from this
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 * software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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 * POSSIBILITY OF SUCH DAMAGE.
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
3267 post 35
#include <errno.h>
3304 post 36
 
3265 post 37
#include "util.h"
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#include "errors.h"
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#include "entry.h"
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#include "cmds.h"
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#include "cd.h"
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static char * cmdname = "cd";
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3413 post 45
void help_cmd_cd(unsigned int level)
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{
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    if (level == HELP_SHORT) {
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        printf("`%s' changes the current working directory.\n", cmdname);
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    } else {
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        printf(
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        "  %s <directory>\n"
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        "  Change directory to <directory>, e.g `%s /sbin'\n",
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            cmdname, cmdname);
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    }
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3413 post 56
    return;
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}
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/* This is a very rudamentary 'cd' command. It is not 'link smart' (yet) */
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3413 post 61
int cmd_cd(char **argv, cliuser_t *usr)
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{
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    int argc, rc = 0;
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3376 post 65
    argc = cli_count_args(argv);
3265 post 66
 
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    /* We don't yet play nice with whitespace, a getopt implementation should
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     * protect "quoted\ destination" as a single argument. Its not our job to
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     * look for && || or redirection as the tokenizer should have done that
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     * (currently, it does not) */
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    if (argc > 2) {
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        cli_error(CL_EFAIL, "Too many arguments to `%s'", cmdname);
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        return CMD_FAILURE;
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    }
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3278 post 77
    if (argc < 2) {
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        printf("%s - no directory specified. Try `help %s extended'\n",
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            cmdname, cmdname);
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        return CMD_FAILURE;
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    }
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3265 post 83
    /* We have the correct # of arguments
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     * TODO: handle tidle (~) expansion? */
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3269 post 86
    rc = chdir(argv[1]);
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    if (rc == 0) {
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        cli_set_prompt(usr);
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        return CMD_SUCCESS;
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    } else {
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        switch (rc) {
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        case ENOMEM:
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            cli_error(CL_EFAIL, "Destination path too long");
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            break;
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        case ENOENT:
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            cli_error(CL_ENOENT, "Invalid directory `%s'", argv[1]);
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            break;
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        default:
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            cli_error(CL_EFAIL, "Unable to change to `%s'", argv[1]);
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            break;
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        }
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    }
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    return CMD_FAILURE;
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}