Contents of /trunk/mkinitrd-magellan/busybox/modutils/modutils.c
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
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Fri Apr 24 18:33:46 2009 UTC (15 years, 5 months ago) by niro
File MIME type: text/plain
File size: 3114 byte(s)
-updated to busybox-1.13.4
1 | /* |
2 | * Common modutils related functions for busybox |
3 | * |
4 | * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi> |
5 | * |
6 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
7 | */ |
8 | |
9 | #include "modutils.h" |
10 | |
11 | #ifdef __UCLIBC__ |
12 | extern int init_module(void *module, unsigned long len, const char *options); |
13 | extern int delete_module(const char *module, unsigned int flags); |
14 | #else |
15 | # include <sys/syscall.h> |
16 | # define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts) |
17 | # define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags) |
18 | #endif |
19 | |
20 | USE_FEATURE_2_4_MODULES(char *insmod_outputname); |
21 | |
22 | /* |
23 | a libbb candidate from ice age! |
24 | */ |
25 | llist_t FAST_FUNC *llist_find(llist_t *first, const char *str) |
26 | { |
27 | while (first != NULL) { |
28 | if (strcmp(first->data, str) == 0) |
29 | return first; |
30 | first = first->link; |
31 | } |
32 | return NULL; |
33 | } |
34 | |
35 | void FAST_FUNC replace(char *s, char what, char with) |
36 | { |
37 | while (*s) { |
38 | if (what == *s) |
39 | *s = with; |
40 | ++s; |
41 | } |
42 | } |
43 | |
44 | char * FAST_FUNC replace_underscores(char *s) |
45 | { |
46 | replace(s, '-', '_'); |
47 | return s; |
48 | } |
49 | |
50 | int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim) |
51 | { |
52 | char *tok; |
53 | int len = 0; |
54 | |
55 | while ((tok = strsep(&string, delim)) != NULL) { |
56 | if (tok[0] == '\0') |
57 | continue; |
58 | llist_add_to_end(llist, xstrdup(tok)); |
59 | len += strlen(tok); |
60 | } |
61 | return len; |
62 | } |
63 | |
64 | char * FAST_FUNC filename2modname(const char *filename, char *modname) |
65 | { |
66 | int i; |
67 | char *from; |
68 | |
69 | if (filename == NULL) |
70 | return NULL; |
71 | if (modname == NULL) |
72 | modname = xmalloc(MODULE_NAME_LEN); |
73 | from = bb_get_last_path_component_nostrip(filename); |
74 | for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++) |
75 | modname[i] = (from[i] == '-') ? '_' : from[i]; |
76 | modname[i] = 0; |
77 | |
78 | return modname; |
79 | } |
80 | |
81 | const char * FAST_FUNC moderror(int err) |
82 | { |
83 | switch (err) { |
84 | case -1: |
85 | return "no such module"; |
86 | case ENOEXEC: |
87 | return "invalid module format"; |
88 | case ENOENT: |
89 | return "unknown symbol in module, or unknown parameter"; |
90 | case ESRCH: |
91 | return "module has wrong symbol version"; |
92 | case ENOSYS: |
93 | return "kernel does not support requested operation"; |
94 | default: |
95 | return strerror(err); |
96 | } |
97 | } |
98 | |
99 | char * FAST_FUNC parse_cmdline_module_options(char **argv) |
100 | { |
101 | char *options; |
102 | int optlen; |
103 | |
104 | options = xzalloc(1); |
105 | optlen = 0; |
106 | while (*++argv) { |
107 | options = xrealloc(options, optlen + 2 + strlen(*argv) + 2); |
108 | /* Spaces handled by "" pairs, but no way of escaping quotes */ |
109 | optlen += sprintf(options + optlen, (strchr(*argv, ' ') ? "\"%s\" " : "%s "), *argv); |
110 | } |
111 | return options; |
112 | } |
113 | |
114 | int FAST_FUNC bb_init_module(const char *filename, const char *options) |
115 | { |
116 | size_t len = MAXINT(ssize_t); |
117 | char *image; |
118 | int rc = ENOENT; |
119 | |
120 | #if ENABLE_FEATURE_2_4_MODULES |
121 | if (get_linux_version_code() < KERNEL_VERSION(2,6,0)) |
122 | return bb_init_module_24(filename, options); |
123 | #endif |
124 | |
125 | /* Use the 2.6 way */ |
126 | image = xmalloc_open_zipped_read_close(filename, &len); |
127 | if (image) { |
128 | if (init_module(image, len, options) != 0) |
129 | rc = errno; |
130 | else |
131 | rc = 0; |
132 | free(image); |
133 | } |
134 | |
135 | return rc; |
136 | } |
137 | |
138 | int FAST_FUNC bb_delete_module(const char *module, unsigned int flags) |
139 | { |
140 | return delete_module(module, flags); |
141 | } |