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  1. /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
  2.  * All rights reserved.
  3.  * Copyright (c) 2008, Jiri Svoboda - All Rights Reserved
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions are met:
  7.  *
  8.  * Redistributions of source code must retain the above copyright notice, this
  9.  * list of conditions and the following disclaimer.
  10.  *
  11.  * Redistributions in binary form must reproduce the above copyright notice,
  12.  * this list of conditions and the following disclaimer in the documentation
  13.  * and/or other materials provided with the distribution.
  14.  *
  15.  * Neither the name of the original program's authors nor the names of its
  16.  * contributors may be used to endorse or promote products derived from this
  17.  * software without specific prior written permission.
  18.  *
  19.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  20.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  23.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29.  * POSSIBILITY OF SUCH DAMAGE.
  30.  */
  31.  
  32. #include <stdio.h>
  33. #include <stdlib.h>
  34. #include <string.h>
  35. #include <io/stream.h>
  36. #include <console.h>
  37.  
  38. #include "config.h"
  39. #include "util.h"
  40. #include "scli.h"
  41. #include "input.h"
  42. #include "errors.h"
  43. #include "exec.h"
  44.  
  45. extern volatile unsigned int cli_interactive;
  46.  
  47. /* Not exposed in input.h */
  48. static void cli_restricted(char *);
  49. static void read_line(char *, int);
  50.  
  51. /* More than a macro than anything */
  52. static void cli_restricted(char *cmd)
  53. {
  54.     printf("%s is not available in %s mode\n", cmd,
  55.         cli_interactive ? "interactive" : "non-interactive");
  56.  
  57.     return;
  58. }
  59.  
  60. /* Tokenizes input from console, sees if the first word is a built-in, if so
  61.  * invokes the built-in entry point (a[0]) passing all arguments in a[] to
  62.  * the handler */
  63. int tok_input(cliuser_t *usr)
  64. {
  65.     char *cmd[WORD_MAX];
  66.     int n = 0, i = 0;
  67.     int rc = 0;
  68.     char *tmp;
  69.  
  70.     if (NULL == usr->line)
  71.         return CL_EFAIL;
  72.  
  73.     tmp = cli_strdup(usr->line);
  74.  
  75.     cmd[n] = cli_strtok(tmp, " ");
  76.     while (cmd[n] && n < WORD_MAX) {
  77.         cmd[++n] = cli_strtok(NULL, " ");
  78.     }
  79.  
  80.     /* We have rubbish */
  81.     if (NULL == cmd[0]) {
  82.         rc = CL_ENOENT;
  83.         goto finit;
  84.     }
  85.  
  86.     /* Its a builtin command ? */
  87.     if ((i = (is_builtin(cmd[0]))) > -1) {
  88.         rc = run_builtin(i, cmd, usr);
  89.         goto finit;
  90.     /* Its a module ? */
  91.     } else if ((i = (is_module(cmd[0]))) > -1) {
  92.         rc = run_module(i, cmd);
  93.         goto finit;
  94.     }
  95.  
  96.     /* See what try_exec thinks of it */
  97.     rc = try_exec(cmd[0], cmd);
  98.  
  99. finit:
  100.     if (NULL != usr->line) {
  101.         free(usr->line);
  102.         usr->line = (char *) NULL;
  103.     }
  104.     if (NULL != tmp)
  105.         free(tmp);
  106.  
  107.     return rc;
  108. }
  109.  
  110. /* Borrowed from Jiri Svoboda's 'cli' uspace app */
  111. static void read_line(char *buffer, int n)
  112. {
  113.     char c;
  114.     int chars;
  115.  
  116.     chars = 0;
  117.     while (chars < n - 1) {
  118.         c = getchar();
  119.         if (c < 0)
  120.             return;
  121.         if (c == '\n')
  122.             break;
  123.         if (c == '\b') {
  124.             if (chars > 0) {
  125.                 putchar('\b');
  126.                 --chars;
  127.             }
  128.             continue;
  129.         }
  130.         putchar(c);
  131.         buffer[chars++] = c;
  132.     }
  133.     putchar('\n');
  134.     buffer[chars] = '\0';
  135. }
  136.  
  137. /* TODO:
  138.  * Implement something like editline() / readline(), if even
  139.  * just for command history and making arrows work. */
  140. void get_input(cliuser_t *usr)
  141. {
  142.     char line[INPUT_MAX];
  143.     size_t len = 0;
  144.  
  145.     console_set_style(STYLE_EMPHASIS);
  146.     printf("%s", usr->prompt);
  147.     console_set_style(STYLE_NORMAL);
  148.  
  149.     read_line(line, INPUT_MAX);
  150.     len = strlen(line);
  151.     /* Make sure we don't have rubbish or a C/R happy user */
  152.     if (len == 0 || line[0] == '\n')
  153.         return;
  154.     usr->line = cli_strdup(line);
  155.  
  156.     return;
  157. }
  158.  
  159.