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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.  
  36. #ifdef HELENOS
  37. #include <io/stream.h>
  38. #endif
  39.  
  40. #include "config.h"
  41. #include "util.h"
  42. #include "scli.h"
  43. #include "input.h"
  44. #include "errors.h"
  45. #include "exec.h"
  46.  
  47. extern volatile unsigned int cli_interactive;
  48.  
  49. /* More than a macro than anything */
  50. void cli_restricted(char *cmd)
  51. {
  52.     cli_verbose("%s is not available in %s mode\n", cmd,
  53.         cli_interactive ? "interactive" : "non-interactive");
  54.  
  55.     return;
  56. }
  57.  
  58. /* Tokenizes input from console, sees if the first word is a built-in, if so
  59.  * invokes the built-in entry point (a[0]) passing all arguments in a[] to
  60.  * the handler */
  61. int tok_input(cliuser_t *usr)
  62. {
  63.     char *cmd[WORD_MAX];
  64.     int n = 0, i = 0;
  65.     int rc = 0;
  66.     char *tmp;
  67.  
  68.     if (NULL == usr->line)
  69.         return CL_EFAIL;
  70.  
  71.     tmp = cli_strdup(usr->line);
  72.  
  73.     /* Break up what the user typed, space delimited */
  74.     cmd[n] = cli_strtok(tmp, " ");
  75.     while (cmd[n] && n < WORD_MAX) {
  76.         cmd[++n] = cli_strtok(NULL, " ");
  77.     }
  78.  
  79.     /* We have rubbish */
  80.     if (NULL == cmd[0]) {
  81.         rc = CL_ENOENT;
  82.         goto finit;
  83.     }
  84.  
  85.     /* Check what kind of command argv[0] might be */
  86.     if ((i = (is_builtin(cmd[0]))) > -1) {
  87.         /* Its a builtin */
  88.         if (builtin_is_restricted(i)) {
  89.             /* Try an external command matching argv[0] */
  90.                 rc = try_exec(cmd[0], cmd);
  91.                 if (rc)
  92.                     cli_restricted(cmd[0]);
  93.                 goto finit;
  94.         }
  95.         rc = run_builtin(i, cmd, usr);
  96.         goto finit;
  97.     } else if ((i = (is_module(cmd[0]))) > -1) {
  98.         /* Its a module, it can't modify cliuser_t */
  99.         if (module_is_restricted(i)) {
  100.             rc = try_exec(cmd[0], cmd);
  101.             if (rc)
  102.                 cli_restricted(cmd[0]);
  103.             goto finit;
  104.         }
  105.         rc = run_module(i, cmd);
  106.         goto finit;
  107.     } else {
  108.         /* See what try_exec() thinks of it */
  109.         rc = try_exec(cmd[0], cmd);
  110.         goto finit;
  111.     }
  112.  
  113. finit:
  114.     if (NULL != usr->line) {
  115.         free(usr->line);
  116.         usr->line = (char *) NULL;
  117.     }
  118.     if (NULL != tmp)
  119.         free(tmp);
  120.  
  121.     return rc;
  122. }
  123.  
  124. #ifdef HELENOS
  125. /* Borrowed from Jiri Svoboda's 'cli' uspace app */
  126. void read_line(char *buffer, int n)
  127. {
  128.     char c;
  129.     int chars;
  130.  
  131.     chars = 0;
  132.     while (chars < n - 1) {
  133.         c = getchar();
  134.         if (c < 0)
  135.             return;
  136.         if (c == '\n')
  137.             break;
  138.         if (c == '\b') {
  139.             if (chars > 0) {
  140.                 putchar('\b');
  141.                 --chars;
  142.             }
  143.             continue;
  144.         }
  145.         putchar(c);
  146.         buffer[chars++] = c;
  147.     }
  148.     putchar('\n');
  149.     buffer[chars] = '\0';
  150. }
  151. #endif
  152.  
  153. /* This is soupy, fix me */
  154. void get_input(cliuser_t *usr)
  155. {
  156.     char line[INPUT_MAX];
  157.     size_t len = 0;
  158.  
  159.     printf("%s", usr->prompt);
  160. #ifdef HELENOS
  161.     read_line(line, INPUT_MAX);
  162. #else
  163.     fgets(line, INPUT_MAX, stdin);
  164. #endif
  165.     len = strlen(line);
  166.     /* Make sure we don't have rubbish or a C/R happy user */
  167.     if (len == 0 || line[0] == '\n')
  168.         return;
  169.     if (len == 1 && line[len-1] == '\n')
  170.         return;
  171. #ifndef HELENOS
  172.     /* Null terminate line */
  173.     if (len > 0 && line[len-1] == '\n')
  174.         line[len-1] = '\0';
  175. #endif
  176.     usr->line = cli_strdup(line);
  177.     return;
  178. }
  179.  
  180.