| 0,0 → 1,156 |
|---|
| /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * Redistributions of source code must retain the above copyright notice, this |
| * list of conditions and the following disclaimer. |
| * |
| * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * Neither the name of the original program's authors nor the names of its |
| * contributors may be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /* NOTES: |
| * module_* functions are pretty much identical to builtin_* functions at this |
| * point. On the surface, it would appear that making each function dual purpose |
| * would be economical. |
| * |
| * These are kept separate because the structures (module_t and builtin_t) may |
| * grow apart and become rather different, even though they're identical at this |
| * point. |
| * |
| * To keep things easy to hack, everything is separated. In reality this only adds |
| * 6 - 8 extra functions, but keeps each function very easy to read and modify. */ |
| |
| /* TODO: |
| * Many of these could be unsigned, provided the modules and builtins themselves |
| * can follow suit. Long term goal. */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "errors.h" |
| #include "cmds.h" |
| #include "module_aliases.h" |
| |
| extern volatile unsigned int cli_interactive; |
| |
| int module_is_restricted(int pos) |
| { |
| /* Restriction Levels: |
| * -1 -> Available only in interactive mode |
| * 0 -> Available in any mode |
| * 1 -> Available only in non-interactive mode */ |
| |
| module_t *mod = modules; |
| mod += pos; |
| /* We're interactive, and the module is OK to run */ |
| if (cli_interactive && mod->restricted <= 0) |
| return 0; |
| /* We're not interactive, and the module is OK to run */ |
| if (!cli_interactive && mod->restricted >= 0) |
| return 0; |
| |
| /* Anything else is just a big fat no :) */ |
| return 1; |
| } |
| |
| /* Checks if an entry function matching command exists in modules[], if so |
| * its position in the array is returned */ |
| int is_module(const char *command) |
| { |
| module_t *mod; |
| unsigned int i = 0; |
| |
| if (NULL == command) |
| return -2; |
| |
| for (mod = modules; mod->name != NULL; mod++, i++) { |
| if (!strcmp(mod->name, command)) |
| return i; |
| } |
| |
| return -1; |
| } |
| |
| /* Checks if a module is an alias (sharing an entry point with another |
| * module). Returns 1 if so */ |
| int is_module_alias(const char *command) |
| { |
| unsigned int i = 0; |
| |
| if (NULL == command) |
| return -1; |
| |
| for(i=0; mod_aliases[i] != NULL; i+=2) { |
| if (!strcmp(mod_aliases[i], command)) |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /* Returns the name of the module that an alias points to */ |
| char *alias_for_module(const char *command) |
| { |
| unsigned int i = 0; |
| |
| if (NULL == command) |
| return (char *)NULL; |
| |
| for(i=0; mod_aliases[i] != NULL; i++) { |
| if (!strcmp(mod_aliases[i], command)) |
| return (char *)mod_aliases[++i]; |
| i++; |
| } |
| |
| return (char *)NULL; |
| } |
| |
| |
| /* Invokes the 'help' entry function for the module at position (int) module, |
| * which wants an unsigned int to determine brief or extended display. */ |
| int help_module(int module, unsigned int extended) |
| { |
| module_t *mod = modules; |
| |
| mod += module; |
| |
| if (NULL != mod->help) { |
| mod->help(extended); |
| return CL_EOK; |
| } else |
| return CL_ENOENT; |
| } |
| |
| /* Invokes the module entry point modules[module], passing argv[] as an argument |
| * stack. */ |
| int run_module(int module, char *argv[]) |
| { |
| module_t *mod = modules; |
| |
| mod += module; |
| |
| if (NULL != mod->entry) |
| return ((int)mod->entry(argv)); |
| |
| return CL_ENOENT; |
| } |