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  1. /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com>
  2.  * All rights reserved.
  3.  *
  4.  * Redistribution and use in source and binary forms, with or without
  5.  * modification, are permitted provided that the following conditions are met:
  6.  *
  7.  * Redistributions of source code must retain the above copyright notice, this
  8.  * list of conditions and the following disclaimer.
  9.  *
  10.  * Redistributions in binary form must reproduce the above copyright notice,
  11.  * this list of conditions and the following disclaimer in the documentation
  12.  * and/or other materials provided with the distribution.
  13.  *
  14.  * Neither the name of the original program's authors nor the names of its
  15.  * contributors may be used to endorse or promote products derived from this
  16.  * software without specific prior written permission.
  17.  *
  18.  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  19.  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21.  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  22.  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  23.  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  24.  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  25.  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  26.  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  27.  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  28.  * POSSIBILITY OF SUCH DAMAGE.
  29.  */
  30.  
  31. #include <stdio.h>
  32. #include <stdlib.h>
  33. #include <string.h>
  34. #include <unistd.h>
  35. #include "config.h"
  36. #include "scli.h"
  37. #include "input.h"
  38. #include "util.h"
  39. #include "errors.h"
  40. #include "cmds/cmds.h"
  41.  
  42. /* See scli.h */
  43. static cliuser_t usr;
  44.  
  45. /* Globals that are modified during start-up that modules/builtins
  46.  * should be aware of. */
  47. volatile unsigned int cli_quit = 0;
  48. volatile unsigned int cli_interactive = 1;
  49. volatile unsigned int cli_verbocity = 1;
  50.  
  51. /* The official name of this program
  52.  * (change to your liking in configure.ac and re-run autoconf) */
  53. const char *progname = PACKAGE_NAME;
  54.  
  55. /* These are not exposed, even to builtins */
  56. static int cli_init(cliuser_t *usr);
  57. static void cli_finit(cliuser_t *usr);
  58.  
  59. /* (re)allocates memory to store the current working directory, gets
  60.  * and updates the current working directory, formats the prompt
  61.  * string */
  62. unsigned int cli_set_prompt(cliuser_t *usr)
  63. {
  64.     usr->prompt = (char *) realloc(usr->prompt, PATH_MAX);
  65.     if (NULL == usr->prompt) {
  66.         cli_error(CL_ENOMEM, "Can not allocate prompt");
  67.         return 1;
  68.     }
  69.     memset(usr->prompt, 0, sizeof(usr->prompt));
  70.  
  71.     usr->cwd = (char *) realloc(usr->cwd, PATH_MAX);
  72.     if (NULL == usr->cwd) {
  73.         cli_error(CL_ENOMEM, "Can not allocate cwd");
  74.         return 1;
  75.     }
  76.     memset(usr->cwd, 0, sizeof(usr->cwd));
  77.  
  78.     usr->cwd = getcwd(usr->cwd, PATH_MAX - 1);
  79.  
  80.     if (NULL == usr->cwd)
  81.         snprintf(usr->cwd, PATH_MAX, "(unknown)");
  82.  
  83.     if (1 < cli_psprintf(&usr->prompt, "%s # ", usr->cwd)) {
  84.         cli_error(cli_errno, "Failed to set prompt");
  85.         return 1;
  86.     }
  87.  
  88.     return 0;
  89. }
  90.  
  91. /* Constructor */
  92. static int cli_init(cliuser_t *usr)
  93. {
  94.     usr->line = (char *) NULL;
  95.     usr->name = "root";
  96.     usr->home = "/";
  97.     usr->cwd = (char *) NULL;
  98.     usr->prompt = (char *) NULL;
  99.     chdir(usr->home);
  100.     usr->lasterr = 0;
  101.     return (int) cli_set_prompt(usr);
  102. }
  103.  
  104. /* Destructor */
  105. static void cli_finit(cliuser_t *usr)
  106. {
  107.     if (NULL != usr->line)
  108.         free(usr->line);
  109.     if (NULL != usr->prompt)
  110.         free(usr->prompt);
  111.     if (NULL != usr->cwd)
  112.         free(usr->cwd);
  113. }
  114.  
  115. int main(int argc, char *argv[])
  116. {
  117.     int ret = 0;
  118.     int i = 0;
  119.  
  120.     if (cli_init(&usr))
  121.         exit(EXIT_FAILURE);
  122.  
  123.     printf("Welcome to %s - %s\nType `help' at any time for usage information.\n",
  124.         progname, PACKAGE_STRING);
  125.  
  126.     while (!cli_quit) {
  127.         cli_set_prompt(&usr);
  128.         get_input(&usr);
  129.         if (NULL != usr.line) {
  130.             ret = tok_input(&usr);
  131.             usr.lasterr = ret;
  132.         }
  133.         i++;
  134.     }
  135.     goto finit;
  136.  
  137. finit:
  138.     cli_finit(&usr);
  139.     return ret;
  140. }
  141.