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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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 * Copyright (c) 2008, Jiri Svoboda - 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 <string.h>
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#include <io/stream.h>
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#include "config.h"
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#include "util.h"
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#include "scli.h"
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#include "input.h"
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#include "errors.h"
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#include "exec.h"
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extern volatile unsigned int cli_interactive;
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/* More than a macro than anything */
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void cli_restricted(char *cmd)
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{
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    cli_verbose("%s is not available in %s mode\n", cmd,
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        cli_interactive ? "interactive" : "non-interactive");
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    return;
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}
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/* Tokenizes input from console, sees if the first word is a built-in, if so
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 * invokes the built-in entry point (a[0]) passing all arguments in a[] to
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 * the handler */
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int tok_input(cliuser_t *usr)
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{
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    char *cmd[WORD_MAX];
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    int n = 0, i = 0;
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    int rc = 0;
3269 post 63 
    char *tmp;
3265 post 64 
 
3269 post 65 
    if (NULL == usr->line)
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        return CL_EFAIL;
3265 post 67 
 
3268 post 68 
    tmp = cli_strdup(usr->line);
3275 post 69 
 
3265 post 70 
    /* Break up what the user typed, space delimited */
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    cmd[n] = cli_strtok(tmp, " ");
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    while (cmd[n] && n < WORD_MAX) {
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        cmd[++n] = cli_strtok(NULL, " ");
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    }
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    /* We have rubbish */
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    if (NULL == cmd[0]) {
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        rc = CL_ENOENT;
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        goto finit;
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    }
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    /* Check what kind of command argv[0] might be */
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    if ((i = (is_builtin(cmd[0]))) > -1) {
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        /* Its a builtin */
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        if (builtin_is_restricted(i)) {
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            /* Try an external command matching argv[0] */
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                rc = try_exec(cmd[0], cmd);
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                if (rc)
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                    cli_restricted(cmd[0]);
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                goto finit;
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        }
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        rc = run_builtin(i, cmd, usr);
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        goto finit;
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    } else if ((i = (is_module(cmd[0]))) > -1) {
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        /* Its a module, it can't modify cliuser_t */
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        if (module_is_restricted(i)) {
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            rc = try_exec(cmd[0], cmd);
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            if (rc)
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                cli_restricted(cmd[0]);
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            goto finit;
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        }
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        rc = run_module(i, cmd);
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        goto finit;
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    } else {
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        /* See what try_exec() thinks of it */
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        rc = try_exec(cmd[0], cmd);
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        goto finit;
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    }
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finit:
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    if (NULL != usr->line) {
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        free(usr->line);
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        usr->line = (char *) NULL;
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    }
3268 post 115 
    if (NULL != tmp)
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        free(tmp);
3275 post 117 
 
3265 post 118 
    return rc;
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}
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/* Borrowed from Jiri Svoboda's 'cli' uspace app */
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void read_line(char *buffer, int n)
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{
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    char c;
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    int chars;
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    chars = 0;
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    while (chars < n - 1) {
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        c = getchar();
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        if (c < 0)
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            return;
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        if (c == '\n')
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            break;
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        if (c == '\b') {
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            if (chars > 0) {
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                putchar('\b');
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                --chars;
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            }
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            continue;
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        }
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        putchar(c);
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        buffer[chars++] = c;
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    }
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    putchar('\n');
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    buffer[chars] = '\0';
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}
147 
 
148 
void get_input(cliuser_t *usr)
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{
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    char line[INPUT_MAX];
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    size_t len = 0;
152 
 
153 
    printf("%s", usr->prompt);
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    read_line(line, INPUT_MAX);
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    len = strlen(line);
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    /* Make sure we don't have rubbish or a C/R happy user */
3275 post 157 
    if (len == 0 || line[0] == '\n')
3265 post 158 
        return;
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    if (len == 1 && line[len-1] == '\n')
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        return;
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    usr->line = cli_strdup(line);
3304 post 162 
 
3265 post 163 
    return;
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}
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