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Commit | Line | Data |
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d558e6b5 | 1 | /* dyncmd.c - support dynamic command */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
4 | * Copyright (C) 2009 Free Software Foundation, Inc. | |
5 | * | |
6 | * GRUB is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * GRUB is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GRUB. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <grub/dl.h> | |
21 | #include <grub/mm.h> | |
22 | #include <grub/env.h> | |
23 | #include <grub/misc.h> | |
24 | #include <grub/command.h> | |
25 | #include <grub/normal.h> | |
ec5f98ab | 26 | #include <grub/i18n.h> |
d558e6b5 | 27 | |
28 | static grub_err_t | |
29 | grub_dyncmd_dispatcher (struct grub_command *cmd, | |
30 | int argc, char **args) | |
31 | { | |
32 | char *modname = cmd->data; | |
33 | grub_dl_t mod; | |
34 | grub_err_t ret; | |
35 | ||
36 | mod = grub_dl_load (modname); | |
37 | if (mod) | |
38 | { | |
39 | char *name; | |
40 | ||
41 | grub_free (modname); | |
42 | grub_dl_ref (mod); | |
43 | ||
44 | name = (char *) cmd->name; | |
45 | grub_unregister_command (cmd); | |
46 | ||
47 | cmd = grub_command_find (name); | |
48 | if (cmd) | |
49 | ret = (cmd->func) (cmd, argc, args); | |
50 | else | |
51 | ret = grub_errno; | |
52 | ||
53 | grub_free (name); | |
54 | } | |
55 | else | |
56 | ret = grub_errno; | |
57 | ||
58 | return ret; | |
59 | } | |
60 | ||
61 | /* Read the file command.lst for auto-loading. */ | |
62 | void | |
027de555 | 63 | read_command_list (const char *prefix) |
d558e6b5 | 64 | { |
d558e6b5 | 65 | if (prefix) |
66 | { | |
67 | char *filename; | |
68 | ||
61eb45ee | 69 | filename = grub_xasprintf ("%s/command.lst", prefix); |
d558e6b5 | 70 | if (filename) |
71 | { | |
72 | grub_file_t file; | |
73 | ||
d558e6b5 | 74 | file = grub_file_open (filename); |
75 | if (file) | |
76 | { | |
34f4a5b0 | 77 | char *buf = NULL; |
024478a2 | 78 | grub_command_t ptr, last = 0, next; |
e880248e RM |
79 | |
80 | /* Override previous commands.lst. */ | |
024478a2 | 81 | for (ptr = grub_command_list; ptr; ptr = next) |
e880248e | 82 | { |
024478a2 VS |
83 | next = ptr->next; |
84 | if (ptr->func == grub_dyncmd_dispatcher) | |
85 | { | |
86 | if (last) | |
87 | last->next = ptr->next; | |
88 | else | |
89 | grub_command_list = ptr->next; | |
90 | grub_free (ptr); | |
91 | } | |
92 | else | |
93 | last = ptr; | |
e880248e RM |
94 | } |
95 | ||
ac451143 | 96 | for (;; grub_free (buf)) |
d558e6b5 | 97 | { |
98 | char *p, *name, *modname; | |
99 | grub_command_t cmd; | |
100 | int prio = 0; | |
101 | ||
102 | buf = grub_file_getline (file); | |
103 | ||
104 | if (! buf) | |
105 | break; | |
106 | ||
107 | name = buf; | |
108 | if (*name == '*') | |
109 | { | |
110 | name++; | |
111 | prio++; | |
112 | } | |
113 | ||
114 | if (! grub_isgraph (name[0])) | |
115 | continue; | |
116 | ||
117 | p = grub_strchr (name, ':'); | |
118 | if (! p) | |
119 | continue; | |
120 | ||
121 | *p = '\0'; | |
122 | while (*++p == ' ') | |
123 | ; | |
124 | ||
125 | if (! grub_isgraph (*p)) | |
126 | continue; | |
127 | ||
128 | if (grub_dl_get (p)) | |
129 | continue; | |
130 | ||
131 | name = grub_strdup (name); | |
132 | if (! name) | |
133 | continue; | |
134 | ||
135 | modname = grub_strdup (p); | |
136 | if (! modname) | |
137 | { | |
138 | grub_free (name); | |
139 | continue; | |
140 | } | |
141 | ||
142 | cmd = grub_register_command_prio (name, | |
143 | grub_dyncmd_dispatcher, | |
ec5f98ab | 144 | 0, N_("not loaded"), prio); |
d558e6b5 | 145 | if (! cmd) |
146 | { | |
147 | grub_free (name); | |
148 | grub_free (modname); | |
149 | continue; | |
150 | } | |
151 | cmd->flags |= GRUB_COMMAND_FLAG_DYNCMD; | |
152 | cmd->data = modname; | |
153 | ||
154 | /* Update the active flag. */ | |
155 | grub_command_find (name); | |
156 | } | |
157 | ||
158 | grub_file_close (file); | |
159 | } | |
160 | ||
161 | grub_free (filename); | |
162 | } | |
163 | } | |
164 | ||
165 | /* Ignore errors. */ | |
166 | grub_errno = GRUB_ERR_NONE; | |
167 | } |