/*

 * kmod-modprobe - manage linux kernel modules 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 <assert.h>

#include <errno.h>

#include <getopt.h>

#include <limits.h>

#include <stdbool.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <sys/utsname.h>

#include <sys/wait.h>

#include <shared/array.h>

#include <shared/macro.h>

#include <libkmod/libkmod.h>

#include "kmod.h"

static int log_priority = LOG_CRIT;

static int use_syslog = 0;

#define LOG(...) log_printf(log_priority, __VA_ARGS__)

#define DEFAULT_VERBOSE LOG_WARNING

static int verbose = DEFAULT_VERBOSE;

static int do_show = 0;

static int dry_run = 0;

static int ignore_loaded = 0;

static int lookup_only = 0;

static int first_time = 0;

static int ignore_commands = 0;

static int use_blacklist = 0;

static int force = 0;

static int strip_modversion = 0;

static int strip_vermagic = 0;

static int remove_dependencies = 0;

static int quiet_inuse = 0;

static const char cmdopts_s[] = "arRibfDcnC:d:S:sqvVh";

static const struct option cmdopts[] = {

	{"all", no_argument, 0, 'a'},

	{"remove", no_argument, 0, 'r'},

	{"remove-dependencies", no_argument, 0, 5},

	{"resolve-alias", no_argument, 0, 'R'},

	{"first-time", no_argument, 0, 3},

	{"ignore-install", no_argument, 0, 'i'},

	{"ignore-remove", no_argument, 0, 'i'},

	{"use-blacklist", no_argument, 0, 'b'},

	{"force", no_argument, 0, 'f'},

	{"force-modversion", no_argument, 0, 2},

	{"force-vermagic", no_argument, 0, 1},

	{"show-depends", no_argument, 0, 'D'},

	{"showconfig", no_argument, 0, 'c'},

	{"show-config", no_argument, 0, 'c'},

	{"show-modversions", no_argument, 0, 4},

	{"dump-modversions", no_argument, 0, 4},

	{"dry-run", no_argument, 0, 'n'},

	{"show", no_argument, 0, 'n'},

	{"config", required_argument, 0, 'C'},

	{"dirname", required_argument, 0, 'd'},

	{"set-version", required_argument, 0, 'S'},

	{"syslog", no_argument, 0, 's'},

	{"quiet", no_argument, 0, 'q'},

	{"verbose", no_argument, 0, 'v'},

	{"version", no_argument, 0, 'V'},

	{"help", no_argument, 0, 'h'},

	{NULL, 0, 0, 0}

};

static void help(void)

{

	printf("Usage:\n"

		"\t%s [options] [-i] [-b] modulename\n"

		"\t%s [options] -a [-i] [-b] modulename [modulename...]\n"

		"\t%s [options] -r [-i] modulename\n"

		"\t%s [options] -r -a [-i] modulename [modulename...]\n"

		"\t%s [options] -c\n"

		"\t%s [options] --dump-modversions filename\n"

		"Management Options:\n"

		"\t-a, --all                   Consider every non-argument to\n"

		"\t                            be a module name to be inserted\n"

		"\t                            or removed (-r)\n"

		"\t-r, --remove                Remove modules instead of inserting\n"

		"\t    --remove-dependencies   Also remove modules depending on it\n"

		"\t-R, --resolve-alias         Only lookup and print alias and exit\n"

		"\t    --first-time            Fail if module already inserted or removed\n"

		"\t-i, --ignore-install        Ignore install commands\n"

		"\t-i, --ignore-remove         Ignore remove commands\n"

		"\t-b, --use-blacklist         Apply blacklist to resolved alias.\n"

		"\t-f, --force                 Force module insertion or removal.\n"

		"\t                            implies --force-modversions and\n"

		"\t                            --force-vermagic\n"

		"\t    --force-modversion      Ignore module's version\n"

		"\t    --force-vermagic        Ignore module's version magic\n"

		"\n"

		"Query Options:\n"

		"\t-D, --show-depends          Only print module dependencies and exit\n"

		"\t-c, --showconfig            Print out known configuration and exit\n"

		"\t-c, --show-config           Same as --showconfig\n"

		"\t    --show-modversions      Dump module symbol version and exit\n"

		"\t    --dump-modversions      Same as --show-modversions\n"

		"\n"

		"General Options:\n"

		"\t-n, --dry-run               Do not execute operations, just print out\n"

		"\t-n, --show                  Same as --dry-run\n"

		"\t-C, --config=FILE           Use FILE instead of default search paths\n"

		"\t-d, --dirname=DIR           Use DIR as filesystem root for /lib/modules\n"

		"\t-S, --set-version=VERSION   Use VERSION instead of `uname -r`\n"

		"\t-s, --syslog                print to syslog, not stderr\n"

		"\t-q, --quiet                 disable messages\n"

		"\t-v, --verbose               enables more messages\n"

		"\t-V, --version               show version\n"

		"\t-h, --help                  show this help\n",

		program_invocation_short_name, program_invocation_short_name,

		program_invocation_short_name, program_invocation_short_name,

		program_invocation_short_name, program_invocation_short_name);

}

_printf_format_(1, 2)

static inline void _show(const char *fmt, ...)

{

	va_list args;

	if (!do_show && verbose <= DEFAULT_VERBOSE)

		return;

	va_start(args, fmt);

	vfprintf(stdout, fmt, args);

	fflush(stdout);

	va_end(args);

}

#define SHOW(...) _show(__VA_ARGS__)

static int show_config(struct kmod_ctx *ctx)

{

	struct config_iterators {

		const char *name;

		struct kmod_config_iter *(*get_iter)(const struct kmod_ctx *ctx);

	} ci[] = {

		{ "blacklist", kmod_config_get_blacklists },

		{ "install", kmod_config_get_install_commands },

		{ "remove", kmod_config_get_remove_commands },

		{ "alias", kmod_config_get_aliases },

		{ "options", kmod_config_get_options },

		{ "softdep", kmod_config_get_softdeps },

	};

	size_t i;

	for (i = 0;  i < ARRAY_SIZE(ci); i++) {

		struct kmod_config_iter *iter = ci[i].get_iter(ctx);

		if (iter == NULL)

			continue;

		while (kmod_config_iter_next(iter)) {

			const char *val;

			printf("%s %s", ci[i].name,

					kmod_config_iter_get_key(iter));

			val = kmod_config_iter_get_value(iter);

			if (val != NULL) {

				putchar(' ');

				puts(val);

			} else

				putchar('\n');

		}

		kmod_config_iter_free_iter(iter);

	}

	puts("\n# End of configuration files. Dumping indexes now:\n");

	fflush(stdout);

	kmod_dump_index(ctx, KMOD_INDEX_MODULES_ALIAS, STDOUT_FILENO);

	kmod_dump_index(ctx, KMOD_INDEX_MODULES_SYMBOL, STDOUT_FILENO);

	return 0;

}

static int show_modversions(struct kmod_ctx *ctx, const char *filename)

{

	struct kmod_list *l, *list = NULL;

	struct kmod_module *mod;

	int err = kmod_module_new_from_path(ctx, filename, &mod);

	if (err < 0) {

		LOG("Module %s not found.\n", filename);

		return err;

	}

	err = kmod_module_get_versions(mod, &list);

	if (err < 0) {

		LOG("could not get modversions of %s: %s\n",

			filename, strerror(-err));

		kmod_module_unref(mod);

		return err;

	}

	kmod_list_foreach(l, list) {

		const char *symbol = kmod_module_version_get_symbol(l);

		uint64_t crc = kmod_module_version_get_crc(l);

		printf("0x%08"PRIx64"\t%s\n", crc, symbol);

	}

	kmod_module_versions_free_list(list);

	kmod_module_unref(mod);

	return 0;

}

static int command_do(struct kmod_module *module, const char *type,

				const char *command, const char *cmdline_opts)

{

	const char *modname = kmod_module_get_name(module);

	char *p, *cmd = NULL;

	size_t cmdlen, cmdline_opts_len, varlen;

	int ret = 0;

	if (cmdline_opts == NULL)

		cmdline_opts = "";

	cmdline_opts_len = strlen(cmdline_opts);

	cmd = strdup(command);

	if (cmd == NULL)

		return -ENOMEM;

	cmdlen = strlen(cmd);

	varlen = sizeof("$CMDLINE_OPTS") - 1;

	while ((p = strstr(cmd, "$CMDLINE_OPTS")) != NULL) {

		size_t prefixlen = p - cmd;

		size_t suffixlen = cmdlen - prefixlen - varlen;

		size_t slen = cmdlen - varlen + cmdline_opts_len;

		char *suffix = p + varlen;

		char *s = malloc(slen + 1);

		if (s == NULL) {

			free(cmd);

			return -ENOMEM;

		}

		memcpy(s, cmd, p - cmd);

		memcpy(s + prefixlen, cmdline_opts, cmdline_opts_len);

		memcpy(s + prefixlen + cmdline_opts_len, suffix, suffixlen);

		s[slen] = '\0';

		free(cmd);

		cmd = s;

		cmdlen = slen;

	}

	SHOW("%s %s\n", type, cmd);

	if (dry_run)

		goto end;

	setenv("MODPROBE_MODULE", modname, 1);

	ret = system(cmd);

	unsetenv("MODPROBE_MODULE");

	if (ret == -1 || WEXITSTATUS(ret)) {

		LOG("Error running %s command for %s\n", type, modname);

		if (ret != -1)

			ret = -WEXITSTATUS(ret);

	}

end:

	free(cmd);

	return ret;

}

static int rmmod_do_remove_module(struct kmod_module *mod)

{

	const char *modname = kmod_module_get_name(mod);

	struct kmod_list *deps, *itr;

	int flags = 0, err;

	SHOW("rmmod %s\n", kmod_module_get_name(mod));

	if (dry_run)

		return 0;

	if (force)

		flags |= KMOD_REMOVE_FORCE;

	err = kmod_module_remove_module(mod, flags);

	if (err == -EEXIST) {

		if (!first_time)

			err = 0;

		else

			LOG("Module %s is not in kernel.\n", modname);

	}

	deps = kmod_module_get_dependencies(mod);

	if (deps != NULL) {

		kmod_list_foreach(itr, deps) {

			struct kmod_module *dep = kmod_module_get_module(itr);

			if (kmod_module_get_refcnt(dep) == 0)

				rmmod_do_remove_module(dep);

			kmod_module_unref(dep);

		}

		kmod_module_unref_list(deps);

	}

	return err;

}

static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies,

			   bool ignore_builtin);

static int rmmod_do_deps_list(struct kmod_list *list, bool stop_on_errors)

{

	struct kmod_list *l;

	kmod_list_foreach_reverse(l, list) {

		struct kmod_module *m = kmod_module_get_module(l);

		int r = rmmod_do_module(m, false, true);

		kmod_module_unref(m);

		if (r < 0 && stop_on_errors)

			return r;

	}

	return 0;

}

static int rmmod_do_module(struct kmod_module *mod, bool do_dependencies,

			   bool ignore_builtin)

{

	const char *modname = kmod_module_get_name(mod);

	struct kmod_list *pre = NULL, *post = NULL;

	const char *cmd = NULL;

	int err;

	if (!ignore_commands) {

		err = kmod_module_get_softdeps(mod, &pre, &post);

		if (err < 0) {

			WRN("could not get softdeps of '%s': %s\n",

						modname, strerror(-err));

			return err;

		}

		cmd = kmod_module_get_remove_commands(mod);

	}

	if (cmd == NULL && !ignore_loaded) {

		int state = kmod_module_get_initstate(mod);

		if (state < 0) {

			if (first_time) {

				LOG("Module %s is not in kernel.\n", modname);

				err = -ENOENT;

			} else {

				err = 0;

			}

			goto error;

		} else if (state == KMOD_MODULE_BUILTIN) {

			if (ignore_builtin) {

				err = 0;

			} else {

				LOG("Module %s is builtin.\n", modname);

				err = -ENOENT;

			}

			goto error;

		}

	}

	rmmod_do_deps_list(post, false);

	if (do_dependencies && remove_dependencies) {

		struct kmod_list *deps = kmod_module_get_dependencies(mod);

		err = rmmod_do_deps_list(deps, true);

		if (err < 0)

			goto error;

	}

	if (!ignore_loaded && !cmd) {

		int usage = kmod_module_get_refcnt(mod);

		if (usage > 0) {

			if (!quiet_inuse)

				LOG("Module %s is in use.\n", modname);

			err = -EBUSY;

			goto error;

		}

	}

	if (cmd == NULL)

		err = rmmod_do_remove_module(mod);

	else

		err = command_do(mod, "remove", cmd, NULL);

	if (err < 0)

		goto error;

	rmmod_do_deps_list(pre, false);

error:

	kmod_module_unref_list(pre);

	kmod_module_unref_list(post);

	return err;

}

static int rmmod(struct kmod_ctx *ctx, const char *alias)

{

	struct kmod_list *l, *list = NULL;

	int err;

	err = kmod_module_new_from_lookup(ctx, alias, &list);

	if (err < 0)

		return err;

	if (list == NULL) {

		LOG("Module %s not found.\n", alias);

		err = -ENOENT;

	}

	kmod_list_foreach(l, list) {

		struct kmod_module *mod = kmod_module_get_module(l);

		err = rmmod_do_module(mod, true, false);

		kmod_module_unref(mod);

		if (err < 0)

			break;

	}

	kmod_module_unref_list(list);

	return err;

}

static int rmmod_all(struct kmod_ctx *ctx, char **args, int nargs)

{

	int i, err = 0;

	for (i = 0; i < nargs; i++) {

		int r = rmmod(ctx, args[i]);

		if (r < 0)

			err = r;

	}

	return err;

}

static void print_action(struct kmod_module *m, bool install,

							const char *options)

{

	const char *path;

	if (install) {

		printf("install %s %s\n", kmod_module_get_install_commands(m),

								options);

		return;

	}

	path = kmod_module_get_path(m);

	if (path == NULL) {

		/*

		 * Either a builtin module, or an alias, print only for

		 * builtin

		 */

		if (kmod_module_get_initstate(m) == KMOD_MODULE_BUILTIN)

			printf("builtin %s\n", kmod_module_get_name(m));

	} else

		printf("insmod %s %s\n", kmod_module_get_path(m), options);

}

static int insmod(struct kmod_ctx *ctx, const char *alias,

						const char *extra_options)

{

	struct kmod_list *l, *list = NULL;

	int err, flags = 0;

	void (*show)(struct kmod_module *m, bool install,

						const char *options) = NULL;

	err = kmod_module_new_from_lookup(ctx, alias, &list);

	if (list == NULL || err < 0) {

		LOG("Module %s not found in directory %s\n", alias,

			ctx ? kmod_get_dirname(ctx) : "(missing)");

		return -ENOENT;

	}

	if (strip_modversion || force)

		flags |= KMOD_PROBE_FORCE_MODVERSION;

	if (strip_vermagic || force)

		flags |= KMOD_PROBE_FORCE_VERMAGIC;

	if (ignore_commands)

		flags |= KMOD_PROBE_IGNORE_COMMAND;

	if (ignore_loaded)

		flags |= KMOD_PROBE_IGNORE_LOADED;

	if (dry_run)

		flags |= KMOD_PROBE_DRY_RUN;

	if (do_show || verbose > DEFAULT_VERBOSE)

		show = &print_action;

	flags |= KMOD_PROBE_APPLY_BLACKLIST_ALIAS_ONLY;

	if (use_blacklist)

		flags |= KMOD_PROBE_APPLY_BLACKLIST;

	if (first_time)

		flags |= KMOD_PROBE_FAIL_ON_LOADED;

	kmod_list_foreach(l, list) {

		struct kmod_module *mod = kmod_module_get_module(l);

		if (lookup_only)

			printf("%s\n", kmod_module_get_name(mod));

		else {

			err = kmod_module_probe_insert_module(mod, flags,

					extra_options, NULL, NULL, show);

		}

		if (err >= 0)

			/* ignore flag return values such as a mod being blacklisted */

			err = 0;

		else {

			switch (err) {

			case -EEXIST:

				ERR("could not insert '%s': Module already in kernel\n",

							kmod_module_get_name(mod));

				break;

			case -ENOENT:

				ERR("could not insert '%s': Unknown symbol in module, "

						"or unknown parameter (see dmesg)\n",

						kmod_module_get_name(mod));

				break;

			default:

				ERR("could not insert '%s': %s\n",

						kmod_module_get_name(mod),

						strerror(-err));

				break;

			}

		}

		kmod_module_unref(mod);

	}

	kmod_module_unref_list(list);

	return err;

}

static int insmod_all(struct kmod_ctx *ctx, char **args, int nargs)

{

	int i, err = 0;

	for (i = 0; i < nargs; i++) {

		int r = insmod(ctx, args[i], NULL);

		if (r < 0)

			err = r;

	}

	return err;

}

static void env_modprobe_options_append(const char *value)

{

	const char *old = getenv("MODPROBE_OPTIONS");

	char *env;

	if (old == NULL) {

		setenv("MODPROBE_OPTIONS", value, 1);

		return;

	}

	if (asprintf(&env, "%s %s", old, value) < 0) {

		ERR("could not append value to $MODPROBE_OPTIONS\n");

		return;

	}

	if (setenv("MODPROBE_OPTIONS", env, 1) < 0)

		ERR("could not setenv(MODPROBE_OPTIONS, \"%s\")\n", env);

	free(env);

}

static int options_from_array(char **args, int nargs, char **output)

{

	char *opts = NULL;

	size_t optslen = 0;

	int i, err = 0;

	for (i = 1; i < nargs; i++) {

		size_t len = strlen(args[i]);

		size_t qlen = 0;

		const char *value;

		void *tmp;

		value = strchr(args[i], '=');

		if (value) {

			value++;

			if (*value != '"' && *value != '\'') {

				if (strchr(value, ' '))

					qlen = 2;

			}

		}

		tmp = realloc(opts, optslen + len + qlen + 2);

		if (!tmp) {

			err = -errno;

			free(opts);

			opts = NULL;

			ERR("could not gather module options: out-of-memory\n");

			break;

		}

		opts = tmp;

		if (optslen > 0) {

			opts[optslen] = ' ';

			optslen++;

		}

		if (qlen == 0) {

			memcpy(opts + optslen, args[i], len + 1);

			optslen += len;

		} else {

			size_t keylen = value - args[i];

			size_t valuelen = len - keylen;

			memcpy(opts + optslen, args[i], keylen);

			optslen += keylen;

			opts[optslen] = '"';

			optslen++;

			memcpy(opts + optslen, value, valuelen);

			optslen += valuelen;

			opts[optslen] = '"';

			optslen++;

			opts[optslen] = '\0';

		}

	}

	*output = opts;

	return err;

}

static char **prepend_options_from_env(int *p_argc, char **orig_argv)

{

	const char *p, *env = getenv("MODPROBE_OPTIONS");

	char **new_argv, *str_start, *str_end, *str, *s, *quote;

	int i, argc = *p_argc;

	size_t envlen, space_count = 0;

	if (env == NULL)

		return orig_argv;

	for (p = env; *p != '\0'; p++) {

		if (*p == ' ')

			space_count++;

	}

	envlen = p - env;

	new_argv = malloc(sizeof(char *) * (argc + space_count + 3 + envlen));

	if (new_argv == NULL)

		return NULL;

	new_argv[0] = orig_argv[0];

	str_start = str = (char *) (new_argv + argc + space_count + 3);

	memcpy(str, env, envlen + 1);

	str_end = str_start + envlen;

	quote = NULL;

	for (i = 1, s = str; *s != '\0'; s++) {

		if (quote == NULL) {

			if (*s == ' ') {

				new_argv[i] = str;

				i++;

				*s = '\0';

				str = s + 1;

			} else if (*s == '"' || *s == '\'')

				quote = s;

		} else {

			if (*s == *quote) {

				if (quote == str) {

					new_argv[i] = str + 1;

					i++;

					*s = '\0';

					str = s + 1;

				} else {

					char *it;

					for (it = quote; it < s - 1; it++)

						it[0] = it[1];

					for (it = s - 1; it < str_end - 2; it++)

						it[0] = it[2];

					str_end -= 2;

					*str_end = '\0';

					s -= 2;

				}

				quote = NULL;

			}

		}

	}

	if (str < s) {

		new_argv[i] = str;

		i++;

	}

	memcpy(new_argv + i, orig_argv + 1, sizeof(char *) * (argc - 1));

	new_argv[i + argc] = NULL;

	*p_argc = i + argc - 1;

	return new_argv;

}

static int do_modprobe(int argc, char **orig_argv)

{

	struct kmod_ctx *ctx;

	char **args = NULL, **argv;

	const char **config_paths = NULL;

	int nargs = 0, n_config_paths = 0;

	char dirname_buf[PATH_MAX];

	const char *dirname = NULL;

	const char *root = NULL;

	const char *kversion = NULL;

	int use_all = 0;

	int do_remove = 0;

	int do_show_config = 0;

	int do_show_modversions = 0;

	int err;

	argv = prepend_options_from_env(&argc, orig_argv);

	if (argv == NULL) {

		ERR("Could not prepend options from command line\n");

		return EXIT_FAILURE;

	}

	for (;;) {

		int c, idx = 0;

		c = getopt_long(argc, argv, cmdopts_s, cmdopts, &idx);

		if (c == -1)

			break;

		switch (c) {

		case 'a':

			log_priority = LOG_WARNING;

			use_all = 1;

			break;

		case 'r':

			do_remove = 1;

			break;

		case 5:

			remove_dependencies = 1;

			break;

		case 'R':

			lookup_only = 1;

			break;

		case 3:

			first_time = 1;

			break;

		case 'i':

			ignore_commands = 1;

			break;

		case 'b':

			use_blacklist = 1;

			break;

		case 'f':

			force = 1;

			break;

		case 2:

			strip_modversion = 1;

			break;

		case 1:

			strip_vermagic = 1;

			break;

		case 'D':

			ignore_loaded = 1;

			dry_run = 1;

			do_show = 1;

			break;

		case 'c':

			do_show_config = 1;

			break;

		case 4:

			do_show_modversions = 1;

			break;

		case 'n':

			dry_run = 1;

			break;

		case 'C': {

			size_t bytes = sizeof(char *) * (n_config_paths + 2);

			void *tmp = realloc(config_paths, bytes);

			if (!tmp) {

				ERR("out-of-memory\n");

				err = -1;

				goto done;

			}

			config_paths = tmp;

			config_paths[n_config_paths] = optarg;

			n_config_paths++;

			config_paths[n_config_paths] = NULL;

			env_modprobe_options_append("-C");

			env_modprobe_options_append(optarg);

			break;

		}

		case 'd':

			root = optarg;

			break;

		case 'S':

			kversion = optarg;

			break;

		case 's':

			env_modprobe_options_append("-s");

			use_syslog = 1;

			break;

		case 'q':

			env_modprobe_options_append("-q");

			verbose = LOG_EMERG;

			break;

		case 'v':

			env_modprobe_options_append("-v");

			verbose++;

			break;

		case 'V':

			puts(PACKAGE " version " VERSION);

			puts(KMOD_FEATURES);

			err = 0;

			goto done;

		case 'h':

			help();

			err = 0;

			goto done;

		case '?':

			err = -1;

			goto done;

		default:

			ERR("unexpected getopt_long() value '%c'.\n", c);

			err = -1;

			goto done;

		}

	}

	args = argv + optind;

	nargs = argc - optind;

	log_open(use_syslog);

	if (!do_show_config) {

		if (nargs == 0) {

			ERR("missing parameters. See -h.\n");

			err = -1;

			goto done;

		}

	}

	if (root != NULL || kversion != NULL) {

		struct utsname u;

		if (root == NULL)

			root = "";

		if (kversion == NULL) {

			if (uname(&u) < 0) {

				ERR("uname() failed: %m\n");

				err = -1;

				goto done;

			}

			kversion = u.release;

		}

		snprintf(dirname_buf, sizeof(dirname_buf),

				"%s/lib/modules/%s", root,

				kversion);

		dirname = dirname_buf;

	}

	ctx = kmod_new(dirname, config_paths);