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| 3265 | post | 1 | /* Copyright (c) 2008, Tim Post <tinkertim@gmail.com> |
| 2 | * All rights reserved. |
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| 3 | * |
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| 4 | * Redistribution and use in source and binary forms, with or without |
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| 5 | * modification, are permitted provided that the following conditions are met: |
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| 6 | * |
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| 7 | * Redistributions of source code must retain the above copyright notice, this |
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| 8 | * list of conditions and the following disclaimer. |
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| 9 | * |
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| 10 | * Redistributions in binary form must reproduce the above copyright notice, |
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| 11 | * this list of conditions and the following disclaimer in the documentation |
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| 12 | * and/or other materials provided with the distribution. |
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| 13 | * |
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| 14 | * Neither the name of the original program's authors nor the names of its |
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| 15 | * contributors may be used to endorse or promote products derived from this |
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| 16 | * software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 19 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 20 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 21 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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| 22 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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| 23 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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| 24 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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| 25 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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| 26 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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| 27 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| 28 | * POSSIBILITY OF SUCH DAMAGE. |
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| 29 | */ |
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| 30 | |||
| 31 | /* NOTES: |
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| 32 | * module_* functions are pretty much identical to builtin_* functions at this |
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| 33 | * point. On the surface, it would appear that making each function dual purpose |
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| 34 | * would be economical. |
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| 35 | * |
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| 36 | * These are kept separate because the structures (module_t and builtin_t) may |
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| 37 | * grow apart and become rather different, even though they're identical at this |
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| 38 | * point. |
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| 39 | * |
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| 40 | * To keep things easy to hack, everything is separated. In reality this only adds |
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| 41 | * 6 - 8 extra functions, but keeps each function very easy to read and modify. */ |
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| 42 | |||
| 43 | /* TODO: |
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| 44 | * Many of these could be unsigned, provided the modules and builtins themselves |
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| 45 | * can follow suit. Long term goal. */ |
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| 46 | |||
| 47 | #include <stdio.h> |
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| 48 | #include <stdlib.h> |
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| 49 | #include <string.h> |
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| 50 | #include "errors.h" |
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| 51 | #include "cmds.h" |
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| 52 | #include "module_aliases.h" |
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| 53 | |||
| 54 | extern volatile unsigned int cli_interactive; |
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| 55 | |||
| 56 | /* Checks if an entry function matching command exists in modules[], if so |
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| 57 | * its position in the array is returned */ |
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| 58 | int is_module(const char *command) |
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| 59 | { |
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| 60 | module_t *mod; |
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| 61 | unsigned int i = 0; |
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| 62 | |||
| 63 | if (NULL == command) |
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| 64 | return -2; |
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| 65 | |||
| 66 | for (mod = modules; mod->name != NULL; mod++, i++) { |
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| 67 | if (!strcmp(mod->name, command)) |
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| 68 | return i; |
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| 69 | } |
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| 70 | |||
| 71 | return -1; |
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| 72 | } |
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| 73 | |||
| 74 | /* Checks if a module is an alias (sharing an entry point with another |
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| 75 | * module). Returns 1 if so */ |
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| 76 | int is_module_alias(const char *command) |
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| 77 | { |
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| 78 | unsigned int i = 0; |
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| 79 | |||
| 80 | if (NULL == command) |
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| 81 | return -1; |
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| 82 | |||
| 83 | for(i=0; mod_aliases[i] != NULL; i+=2) { |
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| 84 | if (!strcmp(mod_aliases[i], command)) |
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| 85 | return 1; |
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| 86 | } |
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| 87 | |||
| 88 | return 0; |
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| 89 | } |
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| 90 | |||
| 91 | /* Returns the name of the module that an alias points to */ |
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| 92 | char *alias_for_module(const char *command) |
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| 93 | { |
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| 94 | unsigned int i = 0; |
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| 95 | |||
| 96 | if (NULL == command) |
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| 97 | return (char *)NULL; |
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| 98 | |||
| 99 | for(i=0; mod_aliases[i] != NULL; i++) { |
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| 100 | if (!strcmp(mod_aliases[i], command)) |
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| 101 | return (char *)mod_aliases[++i]; |
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| 102 | i++; |
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| 103 | } |
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| 104 | |||
| 105 | return (char *)NULL; |
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| 106 | } |
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| 107 | |||
| 108 | |||
| 109 | /* Invokes the 'help' entry function for the module at position (int) module, |
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| 110 | * which wants an unsigned int to determine brief or extended display. */ |
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| 111 | int help_module(int module, unsigned int extended) |
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| 112 | { |
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| 113 | module_t *mod = modules; |
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| 114 | |||
| 115 | mod += module; |
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| 116 | |||
| 117 | if (NULL != mod->help) { |
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| 118 | mod->help(extended); |
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| 119 | return CL_EOK; |
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| 120 | } else |
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| 121 | return CL_ENOENT; |
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| 122 | } |
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| 123 | |||
| 124 | /* Invokes the module entry point modules[module], passing argv[] as an argument |
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| 125 | * stack. */ |
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| 126 | int run_module(int module, char *argv[]) |
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| 127 | { |
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| 128 | module_t *mod = modules; |
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| 129 | |||
| 130 | mod += module; |
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| 131 | |||
| 132 | if (NULL != mod->entry) |
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| 133 | return ((int)mod->entry(argv)); |
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| 134 | |||
| 135 | return CL_ENOENT; |
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| 136 | } |