busybox/modutils/modutils.c

/*
 * Common modutils related functions for busybox
 *
 * Copyright (C) 2008 by Timo Teras <timo.teras@iki.fi>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "modutils.h"

#ifdef __UCLIBC__
extern int init_module(void *module, unsigned long len, const char *options);
extern int delete_module(const char *module, unsigned int flags);
#else
# include <sys/syscall.h>
# define init_module(mod, len, opts) syscall(__NR_init_module, mod, len, opts)
# define delete_module(mod, flags) syscall(__NR_delete_module, mod, flags)
#endif

USE_FEATURE_2_4_MODULES(char *insmod_outputname);

/*
 a libbb candidate from ice age!
*/
llist_t FAST_FUNC *llist_find(llist_t *first, const char *str)
{
	while (first != NULL) {
		if (strcmp(first->data, str) == 0)
			return first;
		first = first->link;
	}
	return NULL;
}

void FAST_FUNC replace(char *s, char what, char with)
{
	while (*s) {
		if (what == *s)
			*s = with;
		++s;
	}
}

char * FAST_FUNC replace_underscores(char *s)
{
	replace(s, '-', '_');
	return s;
}

int FAST_FUNC string_to_llist(char *string, llist_t **llist, const char *delim)
{
	char *tok;
	int len = 0;

	while ((tok = strsep(&string, delim)) != NULL) {
		if (tok[0] == '\0')
			continue;
		llist_add_to_end(llist, xstrdup(tok));
		len += strlen(tok);
	}
	return len;
}

char * FAST_FUNC filename2modname(const char *filename, char *modname)
{
	int i;
	char *from;

	if (filename == NULL)
		return NULL;
	if (modname == NULL)
		modname = xmalloc(MODULE_NAME_LEN);
	from = bb_get_last_path_component_nostrip(filename);
	for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
		modname[i] = (from[i] == '-') ? '_' : from[i];
	modname[i] = 0;

	return modname;
}

const char * FAST_FUNC moderror(int err)
{
	switch (err) {
	case -1:
		return "no such module";
	case ENOEXEC:
		return "invalid module format";
	case ENOENT:
		return "unknown symbol in module, or unknown parameter";
	case ESRCH:
		return "module has wrong symbol version";
	case ENOSYS:
		return "kernel does not support requested operation";
	default:
		return strerror(err);
	}
}

char * FAST_FUNC parse_cmdline_module_options(char **argv)
{
	char *options;
	int optlen;

	options = xzalloc(1);
	optlen = 0;
	while (*++argv) {
		options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
		/* Spaces handled by "" pairs, but no way of escaping quotes */
		optlen += sprintf(options + optlen, (strchr(*argv, ' ') ? "\"%s\" " : "%s "), *argv);
	}
	return options;
}

int FAST_FUNC bb_init_module(const char *filename, const char *options)
{
	size_t len = MAXINT(ssize_t);
	char *image;
	int rc = ENOENT;

#if ENABLE_FEATURE_2_4_MODULES
	if (get_linux_version_code() < KERNEL_VERSION(2,6,0))
		return bb_init_module_24(filename, options);
#endif

	/* Use the 2.6 way */
	image = xmalloc_open_zipped_read_close(filename, &len);
	if (image) {
		if (init_module(image, len, options) != 0)
			rc = errno;
		else
			rc = 0;
		free(image);
	}

	return rc;
}

int FAST_FUNC bb_delete_module(const char *module, unsigned int flags)
{
	return delete_module(module, flags);
}
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	}