[thirdparty/kmod.git] / tools / modinfo.c

/*
 * kmod-modinfo - query kernel module information using libkmod.
 *
 * Copyright (C) 2011-2013  ProFUSION embedded systems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <errno.h>
#include <getopt.h>
#include <limits.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/utsname.h>

#include <shared/util.h>

#include <libkmod/libkmod.h>

#include "kmod.h"

static char separator = '\n';
static const char *field = NULL;

struct param {
	struct param *next;
	const char *name;
	const char *param;
	const char *type;
	int namelen;
	int paramlen;
	int typelen;
};

static struct param *add_param(const char *name, int namelen, const char *param, int paramlen, const char *type, int typelen, struct param **list)
{
	struct param *it;

	for (it = *list; it != NULL; it = it->next) {
		if (it->namelen == namelen &&
			memcmp(it->name, name, namelen) == 0)
			break;
	}

	if (it == NULL) {
		it = malloc(sizeof(struct param));
		if (it == NULL)
			return NULL;
		it->next = *list;
		*list = it;
		it->name = name;
		it->namelen = namelen;
		it->param = NULL;
		it->type = NULL;
		it->paramlen = 0;
		it->typelen = 0;
	}

	if (param != NULL) {
		it->param = param;
		it->paramlen = paramlen;
	}

	if (type != NULL) {
		it->type = type;
		it->typelen = typelen;
	}

	return it;
}

static int process_parm(const char *key, const char *value, struct param **params)
{
	const char *name, *param, *type;
	int namelen, paramlen, typelen;
	struct param *it;
	const char *colon = strchr(value, ':');
	if (colon == NULL) {
		ERR("Found invalid \"%s=%s\": missing ':'\n",
		    key, value);
		return 0;
	}

	name = value;
	namelen = colon - value;
	if (streq(key, "parm")) {
		param = colon + 1;
		paramlen = strlen(param);
		type = NULL;
		typelen = 0;
	} else {
		param = NULL;
		paramlen = 0;
		type = colon + 1;
		typelen = strlen(type);
	}

	it = add_param(name, namelen, param, paramlen, type, typelen, params);
	if (it == NULL) {
		ERR("Out of memory!\n");
		return -ENOMEM;
	}

	return 0;
}

static int modinfo_params_do(const struct kmod_list *list)
{
	const struct kmod_list *l;
	struct param *params = NULL;
	int err = 0;

	kmod_list_foreach(l, list) {
		const char *key = kmod_module_info_get_key(l);
		const char *value = kmod_module_info_get_value(l);
		if (!streq(key, "parm") && !streq(key, "parmtype"))
			continue;

		err = process_parm(key, value, &params);
		if (err < 0)
			goto end;
	}

	while (params != NULL) {
		struct param *p = params;
		params = p->next;

		if (p->param == NULL)
			printf("%.*s: (%.*s)%c",
			       p->namelen, p->name, p->typelen, p->type,
			       separator);
		else if (p->type != NULL)
			printf("%.*s:%.*s (%.*s)%c",
			       p->namelen, p->name,
			       p->paramlen, p->param,
			       p->typelen, p->type,
			       separator);
		else
			printf("%.*s:%.*s%c",
			       p->namelen, p->name,
			       p->paramlen, p->param,
			       separator);

		free(p);
	}

end:
	while (params != NULL) {
		void *tmp = params;
		params = params->next;
		free(tmp);
	}

	return err;
}

static int modinfo_do(struct kmod_module *mod)
{
	struct kmod_list *l, *list = NULL;
	struct param *params = NULL;
	int err, is_builtin;
	const char *filename = kmod_module_get_path(mod);

	is_builtin = (filename == NULL);

	if (is_builtin) {
		printf("%-16s%s%c", "name:", kmod_module_get_name(mod), separator);
		filename = "(builtin)";
	}

	if (field != NULL && streq(field, "filename")) {
		printf("%s%c", filename, separator);
		return 0;
	} else if (field == NULL) {
		printf("%-16s%s%c", "filename:",
		       filename, separator);
	}

	err = kmod_module_get_info(mod, &list);
	if (err < 0) {
		if (is_builtin && err == -ENOENT) {
			/*
			 * This is an old kernel that does not have a file
			 * with information about built-in modules.
			 */
			return 0;
		}
		ERR("could not get modinfo from '%s': %s\n",
			kmod_module_get_name(mod), strerror(-err));
		return err;
	}

	if (field != NULL && streq(field, "parm")) {
		err = modinfo_params_do(list);
		goto end;
	}

	kmod_list_foreach(l, list) {
		const char *key = kmod_module_info_get_key(l);
		const char *value = kmod_module_info_get_value(l);
		int keylen;

		if (field != NULL) {
			if (!streq(field, key))
				continue;
			/* filtered output contains no key, just value */
			printf("%s%c", value, separator);
			continue;
		}

		if (streq(key, "parm") || streq(key, "parmtype")) {
			err = process_parm(key, value, &params);
			if (err < 0)
				goto end;
			continue;
		}

		if (separator == '\0') {
			printf("%s=%s%c", key, value, separator);
			continue;
		}

		keylen = strlen(key);
		printf("%s:%-*s%s%c", key, 15 - keylen, "", value, separator);
	}

	if (field != NULL)
		goto end;

	while (params != NULL) {
		struct param *p = params;
		params = p->next;

		if (p->param == NULL)
			printf("%-16s%.*s:%.*s%c", "parm:",
			       p->namelen, p->name, p->typelen, p->type,
			       separator);
		else if (p->type != NULL)
			printf("%-16s%.*s:%.*s (%.*s)%c", "parm:",
			       p->namelen, p->name,
			       p->paramlen, p->param,
			       p->typelen, p->type,
			       separator);
		else
			printf("%-16s%.*s:%.*s%c",
			       "parm:",
			       p->namelen, p->name,
			       p->paramlen, p->param,
			       separator);

		free(p);
	}

end:
	while (params != NULL) {
		void *tmp = params;
		params = params->next;
		free(tmp);
	}
	kmod_module_info_free_list(list);

	return err;
}

static int modinfo_path_do(struct kmod_ctx *ctx, const char *path)
{
	struct kmod_module *mod;
	int err = kmod_module_new_from_path(ctx, path, &mod);
	if (err < 0) {
		ERR("Module file %s not found.\n", path);
		return err;
	}
	err = modinfo_do(mod);
	kmod_module_unref(mod);
	return err;
}

static int modinfo_alias_do(struct kmod_ctx *ctx, const char *alias)
{
	struct kmod_list *l, *list = NULL;
	int err = kmod_module_new_from_lookup(ctx, alias, &list);
	if (err < 0) {
		ERR("Module alias %s not found.\n", alias);
		return err;
	}

	if (list == NULL) {
		ERR("Module %s not found.\n", alias);
		return -ENOENT;
	}

	kmod_list_foreach(l, list) {
		struct kmod_module *mod = kmod_module_get_module(l);
		int r = modinfo_do(mod);
		kmod_module_unref(mod);
		if (r < 0)
			err = r;
	}
	kmod_module_unref_list(list);
	return err;
}

static const char cmdopts_s[] = "adlpn0F:k:b:Vh";
static const struct option cmdopts[] = {
	{"author", no_argument, 0, 'a'},
	{"description", no_argument, 0, 'd'},
	{"license", no_argument, 0, 'l'},
	{"parameters", no_argument, 0, 'p'},
	{"filename", no_argument, 0, 'n'},
	{"null", no_argument, 0, '0'},
	{"field", required_argument, 0, 'F'},
	{"set-version", required_argument, 0, 'k'},
	{"basedir", required_argument, 0, 'b'},
	{"version", no_argument, 0, 'V'},
	{"help", no_argument, 0, 'h'},
	{NULL, 0, 0, 0}
};

static void help(void)
{
	printf("Usage:\n"
		"\t%s [options] filename [args]\n"
		"Options:\n"
		"\t-a, --author                Print only 'author'\n"
		"\t-d, --description           Print only 'description'\n"
		"\t-l, --license               Print only 'license'\n"
		"\t-p, --parameters            Print only 'parm'\n"
		"\t-n, --filename              Print only 'filename'\n"
		"\t-0, --null                  Use \\0 instead of \\n\n"
		"\t-F, --field=FIELD           Print only provided FIELD\n"
		"\t-k, --set-version=VERSION   Use VERSION instead of `uname -r`\n"
		"\t-b, --basedir=DIR           Use DIR as filesystem root for /lib/modules\n"
		"\t-V, --version               Show version\n"
		"\t-h, --help                  Show this help\n",
		program_invocation_short_name);
}

static bool is_module_filename(const char *name)
{
	struct stat st;

	if (stat(name, &st) == 0 && S_ISREG(st.st_mode) &&
		path_ends_with_kmod_ext(name, strlen(name)))
			return true;

	return false;
}

static int do_modinfo(int argc, char *argv[])
{
	struct kmod_ctx *ctx;
	char dirname_buf[PATH_MAX];
	const char *dirname = NULL;
	const char *kversion = NULL;
	const char *root = NULL;
	const char *null_config = NULL;
	int i, err;

	for (;;) {
		int c, idx = 0;
		c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
		if (c == -1)
			break;
		switch (c) {
		case 'a':
			field = "author";
			break;
		case 'd':
			field = "description";
			break;
		case 'l':
			field = "license";
			break;
		case 'p':
			field = "parm";
			break;
		case 'n':
			field = "filename";
			break;
		case '0':
			separator = '\0';
			break;
		case 'F':
			field = optarg;
			break;
		case 'k':
			kversion = optarg;
			break;
		case 'b':
			root = optarg;
			break;
		case 'h':
			help();
			return EXIT_SUCCESS;
		case 'V':
			puts(PACKAGE " version " VERSION);
			puts(KMOD_FEATURES);
			return EXIT_SUCCESS;
		case '?':
			return EXIT_FAILURE;
		default:
			ERR("unexpected getopt_long() value '%c'.\n", c);
			return EXIT_FAILURE;
		}
	}

	if (optind >= argc) {
		ERR("missing module or filename.\n");
		return EXIT_FAILURE;
	}

	if (root != NULL || kversion != NULL) {
		struct utsname u;
		if (root == NULL)
			root = "";
		if (kversion == NULL) {
			if (uname(&u) < 0) {
				ERR("uname() failed: %m\n");
				return EXIT_FAILURE;
			}
			kversion = u.release;
		}
		snprintf(dirname_buf, sizeof(dirname_buf), "%s/lib/modules/%s",
			 root, kversion);
		dirname = dirname_buf;
	}

	ctx = kmod_new(dirname, &null_config);
	if (!ctx) {
		ERR("kmod_new() failed!\n");
		return EXIT_FAILURE;
	}

	err = 0;
	for (i = optind; i < argc; i++) {
		const char *name = argv[i];
		int r;

		if (is_module_filename(name))
			r = modinfo_path_do(ctx, name);
		else
			r = modinfo_alias_do(ctx, name);

		if (r < 0)
			err = r;
	}

	kmod_unref(ctx);
	return err >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}

const struct kmod_cmd kmod_cmd_compat_modinfo = {
	.name = "modinfo",
	.cmd = do_modinfo,
	.help = "compat modinfo command",
};
Commit	Line	Data
0cc3ccfd GSB	1	/*
	2	* kmod-modinfo - query kernel module information using libkmod.
	3	*
e6b0e49b	4	* Copyright (C) 2011-2013 ProFUSION embedded systems
0cc3ccfd GSB	5	*
	6	* This program 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 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
	18	*/
	19
c2e4286b LDM	20	#include <errno.h>
	21	#include <getopt.h>
	22	#include <limits.h>
	23	#include <stdbool.h>
0cc3ccfd GSB	24	#include <stdio.h>
0cc3ccfd GSB	25	#include <stdlib.h>
0cc3ccfd	26	#include <string.h>
0cc3ccfd	27	#include <sys/stat.h>
c2e4286b LDM	28	#include <sys/utsname.h>
c2e4286b LDM	29
f4e8c162 LDM	30	#include <shared/util.h>
f4e8c162 LDM	31
f357866d	32	#include <libkmod/libkmod.h>
0cc3ccfd	33
4a2e20df LDM	34	#include "kmod.h"
4a2e20df LDM	35
0cc3ccfd GSB	36	static char separator = '\n';
	37	static const char *field = NULL;
	38
	39	struct param {
	40	struct param *next;
	41	const char *name;
	42	const char *param;
	43	const char *type;
	44	int namelen;
	45	int paramlen;
	46	int typelen;
	47	};
	48
	49	static struct param add_param(const char name, int namelen, const char param, int paramlen, const char type, int typelen, struct param **list)
	50	{
	51	struct param *it;
	52
	53	for (it = *list; it != NULL; it = it->next) {
	54	if (it->namelen == namelen &&
	55	memcmp(it->name, name, namelen) == 0)
	56	break;
	57	}
	58
	59	if (it == NULL) {
	60	it = malloc(sizeof(struct param));
	61	if (it == NULL)
	62	return NULL;
	63	it->next = *list;
	64	*list = it;
	65	it->name = name;
	66	it->namelen = namelen;
	67	it->param = NULL;
	68	it->type = NULL;
	69	it->paramlen = 0;
	70	it->typelen = 0;
	71	}
	72
	73	if (param != NULL) {
	74	it->param = param;
	75	it->paramlen = paramlen;
	76	}
	77
	78	if (type != NULL) {
	79	it->type = type;
	80	it->typelen = typelen;
	81	}
	82
	83	return it;
	84	}
	85
b014c490 GSB	86	static int process_parm(const char key, const char value, struct param **params)
	87	{
	88	const char name, param, *type;
	89	int namelen, paramlen, typelen;
	90	struct param *it;
	91	const char *colon = strchr(value, ':');
	92	if (colon == NULL) {
9382dbf7	93	ERR("Found invalid \"%s=%s\": missing ':'\n",
b014c490 GSB	94	key, value);
	95	return 0;
	96	}
	97
	98	name = value;
	99	namelen = colon - value;
5b0436a7	100	if (streq(key, "parm")) {
b014c490 GSB	101	param = colon + 1;
	102	paramlen = strlen(param);
	103	type = NULL;
	104	typelen = 0;
	105	} else {
	106	param = NULL;
	107	paramlen = 0;
	108	type = colon + 1;
	109	typelen = strlen(type);
	110	}
	111
	112	it = add_param(name, namelen, param, paramlen, type, typelen, params);
	113	if (it == NULL) {
9382dbf7	114	ERR("Out of memory!\n");
b014c490 GSB	115	return -ENOMEM;
	116	}
	117
	118	return 0;
	119	}
	120
	121	static int modinfo_params_do(const struct kmod_list *list)
	122	{
	123	const struct kmod_list *l;
	124	struct param *params = NULL;
	125	int err = 0;
	126
	127	kmod_list_foreach(l, list) {
	128	const char *key = kmod_module_info_get_key(l);
	129	const char *value = kmod_module_info_get_value(l);
5b0436a7	130	if (!streq(key, "parm") && !streq(key, "parmtype"))
b014c490 GSB	131	continue;
	132
	133	err = process_parm(key, value, &params);
	134	if (err < 0)
	135	goto end;
	136	}
	137
	138	while (params != NULL) {
	139	struct param *p = params;
	140	params = p->next;
	141
	142	if (p->param == NULL)
	143	printf("%.s: (%.s)%c",
	144	p->namelen, p->name, p->typelen, p->type,
	145	separator);
	146	else if (p->type != NULL)
	147	printf("%.s:%.s (%.*s)%c",
	148	p->namelen, p->name,
	149	p->paramlen, p->param,
	150	p->typelen, p->type,
	151	separator);
	152	else
	153	printf("%.s:%.s%c",
	154	p->namelen, p->name,
	155	p->paramlen, p->param,
	156	separator);
	157
	158	free(p);
	159	}
	160
	161	end:
	162	while (params != NULL) {
	163	void *tmp = params;
	164	params = params->next;
	165	free(tmp);
	166	}
	167
	168	return err;
	169	}
	170
0cc3ccfd GSB	171	static int modinfo_do(struct kmod_module *mod)
	172	{
	173	struct kmod_list l, list = NULL;
	174	struct param *params = NULL;
e7e2cb61 AG	175	int err, is_builtin;
	176	const char *filename = kmod_module_get_path(mod);
	177
	178	is_builtin = (filename == NULL);
	179
	180	if (is_builtin) {
	181	printf("%-16s%s%c", "name:", kmod_module_get_name(mod), separator);
	182	filename = "(builtin)";
	183	}
0cc3ccfd	184
5b0436a7	185	if (field != NULL && streq(field, "filename")) {
e7e2cb61	186	printf("%s%c", filename, separator);
0cc3ccfd GSB	187	return 0;
	188	} else if (field == NULL) {
	189	printf("%-16s%s%c", "filename:",
e7e2cb61	190	filename, separator);
0cc3ccfd GSB	191	}
	192
	193	err = kmod_module_get_info(mod, &list);
	194	if (err < 0) {
e7e2cb61 AG	195	if (is_builtin && err == -ENOENT) {
	196	/*
	197	* This is an old kernel that does not have a file
	198	* with information about built-in modules.
	199	*/
	200	return 0;
	201	}
9382dbf7	202	ERR("could not get modinfo from '%s': %s\n",
0cc3ccfd GSB	203	kmod_module_get_name(mod), strerror(-err));
	204	return err;
	205	}
	206
5b0436a7	207	if (field != NULL && streq(field, "parm")) {
b014c490 GSB	208	err = modinfo_params_do(list);
	209	goto end;
	210	}
	211
0cc3ccfd GSB	212	kmod_list_foreach(l, list) {
	213	const char *key = kmod_module_info_get_key(l);
	214	const char *value = kmod_module_info_get_value(l);
	215	int keylen;
	216
	217	if (field != NULL) {
5b0436a7	218	if (!streq(field, key))
0cc3ccfd GSB	219	continue;
	220	/* filtered output contains no key, just value */
	221	printf("%s%c", value, separator);
	222	continue;
	223	}
	224
5b0436a7	225	if (streq(key, "parm") \|\| streq(key, "parmtype")) {
b014c490 GSB	226	err = process_parm(key, value, &params);
b014c490 GSB	227	if (err < 0)
0cc3ccfd	228	goto end;
0cc3ccfd GSB	229	continue;
	230	}
	231
	232	if (separator == '\0') {
	233	printf("%s=%s%c", key, value, separator);
	234	continue;
	235	}
	236
	237	keylen = strlen(key);
	238	printf("%s:%-*s%s%c", key, 15 - keylen, "", value, separator);
	239	}
	240
	241	if (field != NULL)
	242	goto end;
	243
	244	while (params != NULL) {
	245	struct param *p = params;
	246	params = p->next;
	247
	248	if (p->param == NULL)
	249	printf("%-16s%.s:%.s%c", "parm:",
	250	p->namelen, p->name, p->typelen, p->type,
	251	separator);
	252	else if (p->type != NULL)
515ec796	253	printf("%-16s%.s:%.s (%.*s)%c", "parm:",
0cc3ccfd GSB	254	p->namelen, p->name,
	255	p->paramlen, p->param,
	256	p->typelen, p->type,
	257	separator);
	258	else
515ec796	259	printf("%-16s%.s:%.s%c",
0cc3ccfd GSB	260	"parm:",
	261	p->namelen, p->name,
	262	p->paramlen, p->param,
	263	separator);
	264
	265	free(p);
	266	}
	267
	268	end:
	269	while (params != NULL) {
	270	void *tmp = params;
	271	params = params->next;
	272	free(tmp);
	273	}
	274	kmod_module_info_free_list(list);
	275
	276	return err;
	277	}
	278
	279	static int modinfo_path_do(struct kmod_ctx ctx, const char path)
	280	{
	281	struct kmod_module *mod;
	282	int err = kmod_module_new_from_path(ctx, path, &mod);
	283	if (err < 0) {
9382dbf7	284	ERR("Module file %s not found.\n", path);
0cc3ccfd GSB	285	return err;
	286	}
	287	err = modinfo_do(mod);
	288	kmod_module_unref(mod);
	289	return err;
	290	}
	291
	292	static int modinfo_alias_do(struct kmod_ctx ctx, const char alias)
	293	{
e7e2cb61	294	struct kmod_list l, list = NULL;
0cc3ccfd GSB	295	int err = kmod_module_new_from_lookup(ctx, alias, &list);
0cc3ccfd GSB	296	if (err < 0) {
9382dbf7	297	ERR("Module alias %s not found.\n", alias);
0cc3ccfd GSB	298	return err;
0cc3ccfd GSB	299	}
5f85a133 DR	300
5f85a133 DR	301	if (list == NULL) {
9382dbf7	302	ERR("Module %s not found.\n", alias);
5f85a133 DR	303	return -ENOENT;
	304	}
	305
e7e2cb61	306	kmod_list_foreach(l, list) {
0cc3ccfd GSB	307	struct kmod_module *mod = kmod_module_get_module(l);
	308	int r = modinfo_do(mod);
	309	kmod_module_unref(mod);
	310	if (r < 0)
	311	err = r;
	312	}
e7e2cb61	313	kmod_module_unref_list(list);
0cc3ccfd GSB	314	return err;
	315	}
	316
022e1f0e	317	static const char cmdopts_s[] = "adlpn0F:k:b:Vh";
0cc3ccfd GSB	318	static const struct option cmdopts[] = {
	319	{"author", no_argument, 0, 'a'},
	320	{"description", no_argument, 0, 'd'},
	321	{"license", no_argument, 0, 'l'},
	322	{"parameters", no_argument, 0, 'p'},
	323	{"filename", no_argument, 0, 'n'},
	324	{"null", no_argument, 0, '0'},
	325	{"field", required_argument, 0, 'F'},
	326	{"set-version", required_argument, 0, 'k'},
	327	{"basedir", required_argument, 0, 'b'},
	328	{"version", no_argument, 0, 'V'},
	329	{"help", no_argument, 0, 'h'},
	330	{NULL, 0, 0, 0}
	331	};
	332
4a2e20df	333	static void help(void)
0cc3ccfd	334	{
34e06bfb	335	printf("Usage:\n"
0cc3ccfd GSB	336	"\t%s [options] filename [args]\n"
	337	"Options:\n"
	338	"\t-a, --author Print only 'author'\n"
	339	"\t-d, --description Print only 'description'\n"
	340	"\t-l, --license Print only 'license'\n"
	341	"\t-p, --parameters Print only 'parm'\n"
	342	"\t-n, --filename Print only 'filename'\n"
	343	"\t-0, --null Use \\0 instead of \\n\n"
	344	"\t-F, --field=FIELD Print only provided FIELD\n"
	345	"\t-k, --set-version=VERSION Use VERSION instead of `uname -r`\n"
c5b37dba	346	"\t-b, --basedir=DIR Use DIR as filesystem root for /lib/modules\n"
0cc3ccfd GSB	347	"\t-V, --version Show version\n"
0cc3ccfd GSB	348	"\t-h, --help Show this help\n",
7c04aeee	349	program_invocation_short_name);
0cc3ccfd GSB	350	}
0cc3ccfd GSB	351
a23f0c9c DM	352	static bool is_module_filename(const char *name)
	353	{
	354	struct stat st;
a23f0c9c DM	355
a23f0c9c DM	356	if (stat(name, &st) == 0 && S_ISREG(st.st_mode) &&
6f02b6fa	357	path_ends_with_kmod_ext(name, strlen(name)))
a23f0c9c	358	return true;
a23f0c9c DM	359
	360	return false;
	361	}
	362
769becb5	363	static int do_modinfo(int argc, char *argv[])
0cc3ccfd GSB	364	{
	365	struct kmod_ctx *ctx;
	366	char dirname_buf[PATH_MAX];
	367	const char *dirname = NULL;
	368	const char *kversion = NULL;
	369	const char *root = NULL;
	370	const char *null_config = NULL;
	371	int i, err;
	372
	373	for (;;) {
	374	int c, idx = 0;
	375	c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);
	376	if (c == -1)
	377	break;
	378	switch (c) {
	379	case 'a':
	380	field = "author";
	381	break;
	382	case 'd':
	383	field = "description";
	384	break;
	385	case 'l':
	386	field = "license";
	387	break;
	388	case 'p':
	389	field = "parm";
	390	break;
	391	case 'n':
	392	field = "filename";
	393	break;
	394	case '0':
	395	separator = '\0';
	396	break;
	397	case 'F':
	398	field = optarg;
	399	break;
	400	case 'k':
	401	kversion = optarg;
	402	break;
	403	case 'b':
	404	root = optarg;
	405	break;
	406	case 'h':
4a2e20df	407	help();
0cc3ccfd GSB	408	return EXIT_SUCCESS;
	409	case 'V':
	410	puts(PACKAGE " version " VERSION);
655de275	411	puts(KMOD_FEATURES);
0cc3ccfd GSB	412	return EXIT_SUCCESS;
	413	case '?':
	414	return EXIT_FAILURE;
	415	default:
9382dbf7	416	ERR("unexpected getopt_long() value '%c'.\n", c);
0cc3ccfd GSB	417	return EXIT_FAILURE;
	418	}
	419	}
	420
	421	if (optind >= argc) {
9382dbf7	422	ERR("missing module or filename.\n");
0cc3ccfd GSB	423	return EXIT_FAILURE;
	424	}
	425
	426	if (root != NULL \|\| kversion != NULL) {
	427	struct utsname u;
	428	if (root == NULL)
	429	root = "";
	430	if (kversion == NULL) {
	431	if (uname(&u) < 0) {
9382dbf7	432	ERR("uname() failed: %m\n");
0cc3ccfd GSB	433	return EXIT_FAILURE;
	434	}
	435	kversion = u.release;
	436	}
c5b37dba	437	snprintf(dirname_buf, sizeof(dirname_buf), "%s/lib/modules/%s",
0cc3ccfd GSB	438	root, kversion);
	439	dirname = dirname_buf;
	440	}
	441
	442	ctx = kmod_new(dirname, &null_config);
	443	if (!ctx) {
9382dbf7	444	ERR("kmod_new() failed!\n");
0cc3ccfd GSB	445	return EXIT_FAILURE;
0cc3ccfd GSB	446	}
0cc3ccfd GSB	447
	448	err = 0;
	449	for (i = optind; i < argc; i++) {
	450	const char *name = argv[i];
0cc3ccfd GSB	451	int r;
0cc3ccfd GSB	452
a23f0c9c	453	if (is_module_filename(name))
0cc3ccfd GSB	454	r = modinfo_path_do(ctx, name);
	455	else
	456	r = modinfo_alias_do(ctx, name);
	457
	458	if (r < 0)
	459	err = r;
	460	}
	461
	462	kmod_unref(ctx);
	463	return err >= 0 ? EXIT_SUCCESS : EXIT_FAILURE;
	464	}
769becb5	465
769becb5 LDM	466	const struct kmod_cmd kmod_cmd_compat_modinfo = {
	467	.name = "modinfo",
	468	.cmd = do_modinfo,
	469	.help = "compat modinfo command",
	470	};