delete all Makefiles and move udev source to udev/

1 files changed, 804 insertions, 0 deletions

diff --git a/udev/udev_rules_parse.c b/udev/udev_rules_parse.c
new file mode 100644
index 0000000000..3ada8b1c7d
--- /dev/null
+++ b/udev/udev_rules_parse.c
@@ -0,0 +1,804 @@
+/*
+ * Copyright (C) 2003,2004 Greg Kroah-Hartman <greg@kroah.com>
+ * Copyright (C) 2003-2006 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ *	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 version 2 of the License.
+ * 
+ *	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, write to the Free Software Foundation, Inc.,
+ *	51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include "udev.h"
+#include "udev_rules.h"
+#include "udev_selinux.h"
+
+
+void udev_rules_iter_init(struct udev_rules *rules)
+{
+	dbg("bufsize=%zi\n", rules->bufsize);
+	rules->current = 0;
+}
+
+struct udev_rule *udev_rules_iter_next(struct udev_rules *rules)
+{
+	static struct udev_rule *rule;
+
+	if (!rules)
+		return NULL;
+
+	dbg("current=%zi\n", rules->current);
+	if (rules->current >= rules->bufsize) {
+		dbg("no more rules\n");
+		return NULL;
+	}
+
+	/* get next rule */
+	rule = (struct udev_rule *) (rules->buf + rules->current);
+	rules->current += sizeof(struct udev_rule) + rule->bufsize;
+
+	return rule;
+}
+
+struct udev_rule *udev_rules_iter_label(struct udev_rules *rules, const char *label)
+{
+	static struct udev_rule *rule;
+	size_t start = rules->current;
+
+next:
+	dbg("current=%zi\n", rules->current);
+	if (rules->current >= rules->bufsize) {
+		err("LABEL='%s' not found, GOTO will be ignored\n", label);
+		rules->current = start;
+		return NULL;
+	}
+	rule = (struct udev_rule *) (rules->buf + rules->current);
+
+	if (strcmp(&rule->buf[rule->label.val_off], label) != 0) {
+		dbg("moving forward, looking for label '%s'\n", label);
+		rules->current += sizeof(struct udev_rule) + rule->bufsize;
+		goto next;
+	}
+
+	dbg("found label '%s'\n", label);
+	return rule;
+}
+
+static int get_key(char **line, char **key, enum key_operation *operation, char **value)
+{
+	char *linepos;
+	char *temp;
+
+	linepos = *line;
+	if (linepos == NULL && linepos[0] == '\0')
+		return -1;
+
+	/* skip whitespace */
+	while (isspace(linepos[0]) || linepos[0] == ',')
+		linepos++;
+
+	/* get the key */
+	if (linepos[0] == '\0')
+		return -1;
+	*key = linepos;
+
+	while (1) {
+		linepos++;
+		if (linepos[0] == '\0')
+			return -1;
+		if (isspace(linepos[0]))
+			break;
+		if (linepos[0] == '=')
+			break;
+		if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
+			if (linepos[1] == '=')
+				break;
+	}
+
+	/* remember end of key */
+	temp = linepos;
+
+	/* skip whitespace after key */
+	while (isspace(linepos[0]))
+		linepos++;
+	if (linepos[0] == '\0')
+		return -1;
+
+	/* get operation type */
+	if (linepos[0] == '=' && linepos[1] == '=') {
+		*operation = KEY_OP_MATCH;
+		linepos += 2;
+		dbg("operator=match\n");
+	} else if (linepos[0] == '!' && linepos[1] == '=') {
+		*operation = KEY_OP_NOMATCH;
+		linepos += 2;
+		dbg("operator=nomatch\n");
+	} else if (linepos[0] == '+' && linepos[1] == '=') {
+		*operation = KEY_OP_ADD;
+		linepos += 2;
+		dbg("operator=add\n");
+	} else if (linepos[0] == '=') {
+		*operation = KEY_OP_ASSIGN;
+		linepos++;
+		dbg("operator=assign\n");
+	} else if (linepos[0] == ':' && linepos[1] == '=') {
+		*operation = KEY_OP_ASSIGN_FINAL;
+		linepos += 2;
+		dbg("operator=assign_final\n");
+	} else
+		return -1;
+
+	/* terminate key */
+	temp[0] = '\0';
+	dbg("key='%s'\n", *key);
+
+	/* skip whitespace after operator */
+	while (isspace(linepos[0]))
+		linepos++;
+	if (linepos[0] == '\0')
+		return -1;
+
+	/* get the value*/
+	if (linepos[0] == '"')
+		linepos++;
+	else
+		return -1;
+	*value = linepos;
+
+	temp = strchr(linepos, '"');
+	if (!temp)
+		return -1;
+	temp[0] = '\0';
+	temp++;
+	dbg("value='%s'\n", *value);
+
+	/* move line to next key */
+	*line = temp;
+
+	return 0;
+}
+
+/* extract possible KEY{attr} */
+static char *get_key_attribute(char *str)
+{
+	char *pos;
+	char *attr;
+
+	attr = strchr(str, '{');
+	if (attr != NULL) {
+		attr++;
+		pos = strchr(attr, '}');
+		if (pos == NULL) {
+			err("missing closing brace for format\n");
+			return NULL;
+		}
+		pos[0] = '\0';
+		dbg("attribute='%s'\n", attr);
+		return attr;
+	}
+
+	return NULL;
+}
+
+static int add_rule_key(struct udev_rule *rule, struct key *key,
+			enum key_operation operation, const char *value)
+{
+	size_t val_len = strnlen(value, PATH_SIZE);
+
+	key->operation = operation;
+
+	key->val_off = rule->bufsize;
+	strlcpy(rule->buf + rule->bufsize, value, val_len+1);
+	rule->bufsize += val_len+1;
+
+	return 0;
+}
+
+static int add_rule_key_pair(struct udev_rule *rule, struct key_pairs *pairs,
+			     enum key_operation operation, const char *key, const char *value)
+{
+	size_t key_len = strnlen(key, PATH_SIZE);
+
+	if (pairs->count >= PAIRS_MAX) {
+		err("skip, too many keys of the same type in a single rule\n");
+		return -1;
+	}
+
+	add_rule_key(rule, &pairs->keys[pairs->count].key, operation, value);
+
+	/* add the key-name of the pair */
+	pairs->keys[pairs->count].key_name_off = rule->bufsize;
+	strlcpy(rule->buf + rule->bufsize, key, key_len+1);
+	rule->bufsize += key_len+1;
+
+	pairs->count++;
+
+	return 0;
+}
+
+static int add_to_rules(struct udev_rules *rules, char *line, const char *filename, unsigned int lineno)
+{
+	char buf[sizeof(struct udev_rule) + LINE_SIZE];
+	struct udev_rule *rule;
+	size_t rule_size;
+	int valid;
+	char *linepos;
+	char *attr;
+	size_t padding;
+	int physdev = 0;
+	int retval;
+
+	memset(buf, 0x00, sizeof(buf));
+	rule = (struct udev_rule *) buf;
+	rule->event_timeout = -1;
+	linepos = line;
+	valid = 0;
+
+	/* get all the keys */
+	while (1) {
+		char *key;
+		char *value;
+		enum key_operation operation = KEY_OP_UNSET;
+
+		retval = get_key(&linepos, &key, &operation, &value);
+		if (retval)
+			break;
+
+		if (strcasecmp(key, "ACTION") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid ACTION operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->action, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "DEVPATH") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid DEVPATH operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->devpath, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "KERNEL") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid KERNEL operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->kernel, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "SUBSYSTEM") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid SUBSYSTEM operation\n");
+				goto invalid;
+			}
+			/* bus, class, subsystem events should all be the same */
+			if (strcmp(value, "subsystem") == 0 ||
+			    strcmp(value, "bus") == 0 ||
+			    strcmp(value, "class") == 0) {
+				if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
+					err("'%s' must be specified as 'subsystem' \n"
+					    "please fix it in %s:%u", value, filename, lineno);
+				add_rule_key(rule, &rule->subsystem, operation, "subsystem|class|bus");
+			} else
+				add_rule_key(rule, &rule->subsystem, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "DRIVER") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid DRIVER operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->driver, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
+			attr = get_key_attribute(key + sizeof("ATTR")-1);
+			if (attr == NULL) {
+				err("error parsing ATTR attribute\n");
+				goto invalid;
+			}
+			if (add_rule_key_pair(rule, &rule->attr, operation, attr, value) != 0)
+				goto invalid;
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "KERNELS") == 0 ||
+		    strcasecmp(key, "ID") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid KERNELS operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->kernels, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "SUBSYSTEMS") == 0 ||
+		    strcasecmp(key, "BUS") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid SUBSYSTEMS operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->subsystems, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "DRIVERS") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid DRIVERS operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->drivers, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0 ||
+		    strncasecmp(key, "SYSFS{", sizeof("SYSFS{")-1) == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid ATTRS operation\n");
+				goto invalid;
+			}
+			attr = get_key_attribute(key + sizeof("ATTRS")-1);
+			if (attr == NULL) {
+				err("error parsing ATTRS attribute\n");
+				goto invalid;
+			}
+			if (strncmp(attr, "device/", 7) == 0)
+				err("the 'device' link is deprecated and will be removed from a future kernel, \n"
+				    "please fix it in %s:%u", filename, lineno);
+			else if (strstr(attr, "../") != NULL)
+				err("do not reference parent sysfs directories directly, that may break with a future kernel, \n"
+				    "please fix it in %s:%u", filename, lineno);
+			if (add_rule_key_pair(rule, &rule->attrs, operation, attr, value) != 0)
+				goto invalid;
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
+			attr = get_key_attribute(key + sizeof("ENV")-1);
+			if (attr == NULL) {
+				err("error parsing ENV attribute\n");
+				goto invalid;
+			}
+			if (strncmp(attr, "PHYSDEV", 7) == 0)
+				physdev = 1;
+			if (add_rule_key_pair(rule, &rule->env, operation, attr, value) != 0)
+				goto invalid;
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "PROGRAM") == 0) {
+			add_rule_key(rule, &rule->program, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "RESULT") == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid RESULT operation\n");
+				goto invalid;
+			}
+			add_rule_key(rule, &rule->result, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
+			attr = get_key_attribute(key + sizeof("IMPORT")-1);
+			if (attr != NULL && strstr(attr, "program")) {
+				dbg("IMPORT will be executed\n");
+				rule->import_type  = IMPORT_PROGRAM;
+			} else if (attr != NULL && strstr(attr, "file")) {
+				dbg("IMPORT will be included as file\n");
+				rule->import_type  = IMPORT_FILE;
+			} else if (attr != NULL && strstr(attr, "parent")) {
+				dbg("IMPORT will include the parent values\n");
+				rule->import_type = IMPORT_PARENT;
+			} else {
+				/* figure it out if it is executable */
+				char file[PATH_SIZE];
+				char *pos;
+				struct stat statbuf;
+
+				strlcpy(file, value, sizeof(file));
+				pos = strchr(file, ' ');
+				if (pos)
+					pos[0] = '\0';
+
+				/* allow programs in /lib/udev called without the path */
+				if (strchr(file, '/') == NULL) {
+					strlcpy(file, "/lib/udev/", sizeof(file));
+					strlcat(file, value, sizeof(file));
+					pos = strchr(file, ' ');
+					if (pos)
+						pos[0] = '\0';
+				}
+
+				dbg("IMPORT auto mode for '%s'\n", file);
+				if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
+					dbg("IMPORT is executable, will be executed (autotype)\n");
+					rule->import_type  = IMPORT_PROGRAM;
+				} else {
+					dbg("IMPORT is not executable, will be included as file (autotype)\n");
+					rule->import_type  = IMPORT_FILE;
+				}
+			}
+			add_rule_key(rule, &rule->import, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid TEST operation\n");
+				goto invalid;
+			}
+			attr = get_key_attribute(key + sizeof("TEST")-1);
+			if (attr != NULL)
+				rule->test_mode_mask = strtol(attr, NULL, 8);
+			add_rule_key(rule, &rule->test, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "RUN", sizeof("RUN")-1) == 0) {
+			attr = get_key_attribute(key + sizeof("RUN")-1);
+			if (attr != NULL) {
+				if (strstr(attr, "ignore_error"))
+					rule->run_ignore_error = 1;
+			}
+			add_rule_key(rule, &rule->run, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "WAIT_FOR") == 0 || strcasecmp(key, "WAIT_FOR_SYSFS") == 0) {
+			add_rule_key(rule, &rule->wait_for, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "LABEL") == 0) {
+			add_rule_key(rule, &rule->label, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "GOTO") == 0) {
+			add_rule_key(rule, &rule->goto_label, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strncasecmp(key, "NAME", sizeof("NAME")-1) == 0) {
+			attr = get_key_attribute(key + sizeof("NAME")-1);
+			if (attr != NULL) {
+				if (strstr(attr, "all_partitions") != NULL) {
+					dbg("creation of partition nodes requested\n");
+					rule->partitions = DEFAULT_PARTITIONS_COUNT;
+				}
+				if (strstr(attr, "ignore_remove") != NULL) {
+					dbg("remove event should be ignored\n");
+					rule->ignore_remove = 1;
+				}
+			}
+			if (value[0] == '\0')
+				dbg("name empty, node creation supressed\n");
+			add_rule_key(rule, &rule->name, operation, value);
+			continue;
+		}
+
+		if (strcasecmp(key, "SYMLINK") == 0) {
+			if (operation == KEY_OP_MATCH ||
+			    operation == KEY_OP_NOMATCH)
+				add_rule_key(rule, &rule->symlink_match, operation, value);
+			else
+				add_rule_key(rule, &rule->symlink, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "OWNER") == 0) {
+			valid = 1;
+			if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
+				char *endptr;
+				strtoul(value, &endptr, 10);
+				if (endptr[0] != '\0') {
+					char owner[32];
+					uid_t uid = lookup_user(value);
+					dbg("replacing username='%s' by id=%i\n", value, uid);
+					sprintf(owner, "%u", (unsigned int) uid);
+					add_rule_key(rule, &rule->owner, operation, owner);
+					continue;
+				}
+			}
+
+			add_rule_key(rule, &rule->owner, operation, value);
+			continue;
+		}
+
+		if (strcasecmp(key, "GROUP") == 0) {
+			valid = 1;
+			if (rules->resolve_names && (!strchr(value, '$') && !strchr(value, '%'))) {
+				char *endptr;
+				strtoul(value, &endptr, 10);
+				if (endptr[0] != '\0') {
+					char group[32];
+					gid_t gid = lookup_group(value);
+					dbg("replacing groupname='%s' by id=%i\n", value, gid);
+					sprintf(group, "%u", (unsigned int) gid);
+					add_rule_key(rule, &rule->group, operation, group);
+					continue;
+				}
+			}
+
+			add_rule_key(rule, &rule->group, operation, value);
+			continue;
+		}
+
+		if (strcasecmp(key, "MODE") == 0) {
+			add_rule_key(rule, &rule->mode, operation, value);
+			valid = 1;
+			continue;
+		}
+
+		if (strcasecmp(key, "OPTIONS") == 0) {
+			const char *pos;
+
+			if (strstr(value, "last_rule") != NULL) {
+				dbg("last rule to be applied\n");
+				rule->last_rule = 1;
+			}
+			if (strstr(value, "ignore_device") != NULL) {
+				dbg("device should be ignored\n");
+				rule->ignore_device = 1;
+			}
+			if (strstr(value, "ignore_remove") != NULL) {
+				dbg("remove event should be ignored\n");
+				rule->ignore_remove = 1;
+			}
+			pos = strstr(value, "link_priority=");
+			if (pos != NULL) {
+				rule->link_priority = atoi(&pos[strlen("link_priority=")]);
+				dbg("link priority=%i\n", rule->link_priority);
+			}
+			pos = strstr(value, "event_timeout=");
+			if (pos != NULL) {
+				rule->event_timeout = atoi(&pos[strlen("event_timeout=")]);
+				dbg("event timout=%i\n", rule->event_timeout);
+			}
+			pos = strstr(value, "string_escape=");
+			if (pos != NULL) {
+				pos = &pos[strlen("string_escape=")];
+				if (strncmp(pos, "none", strlen("none")) == 0)
+					rule->string_escape = ESCAPE_NONE;
+				else if (strncmp(pos, "replace", strlen("replace")) == 0)
+					rule->string_escape = ESCAPE_REPLACE;
+			}
+			if (strstr(value, "all_partitions") != NULL) {
+				dbg("creation of partition nodes requested\n");
+				rule->partitions = DEFAULT_PARTITIONS_COUNT;
+			}
+			valid = 1;
+			continue;
+		}
+
+		err("unknown key '%s' in %s:%u\n", key, filename, lineno);
+	}
+
+	if (physdev && rule->wait_for.operation == KEY_OP_UNSET)
+		err("PHYSDEV* values are deprecated and will be removed from a future kernel, \n"
+		    "please fix it in %s:%u", filename, lineno);
+
+	/* skip line if not any valid key was found */
+	if (!valid)
+		goto invalid;
+
+	/* grow buffer and add rule */
+	rule_size = sizeof(struct udev_rule) + rule->bufsize;
+	padding = (sizeof(size_t) - rule_size % sizeof(size_t)) % sizeof(size_t);
+	dbg("add %zi padding bytes\n", padding);
+	rule_size += padding;
+	rule->bufsize += padding;
+
+	rules->buf = realloc(rules->buf, rules->bufsize + rule_size);
+	if (!rules->buf) {
+		err("realloc failed\n");
+		goto exit;
+	}
+	dbg("adding rule to offset %zi\n", rules->bufsize);
+	memcpy(rules->buf + rules->bufsize, rule, rule_size);
+	rules->bufsize += rule_size;
+exit:
+	return 0;
+
+invalid:
+	err("invalid rule '%s:%u'\n", filename, lineno);
+	return -1;
+}
+
+static int parse_file(struct udev_rules *rules, const char *filename)
+{
+	char line[LINE_SIZE];
+	char *bufline;
+	unsigned int lineno;
+	char *buf;
+	size_t bufsize;
+	size_t cur;
+	size_t count;
+	int retval = 0;
+
+	if (file_map(filename, &buf, &bufsize) != 0) {
+		err("can't open '%s' as rules file: %s\n", filename, strerror(errno));
+		return -1;
+	}
+	info("reading '%s' as rules file\n", filename);
+
+	/* loop through the whole file */
+	cur = 0;
+	lineno = 0;
+	while (cur < bufsize) {
+		unsigned int i, j;
+
+		count = buf_get_line(buf, bufsize, cur);
+		bufline = &buf[cur];
+		cur += count+1;
+		lineno++;
+
+		/* eat the whitespace */
+		while ((count > 0) && isspace(bufline[0])) {
+			bufline++;
+			count--;
+		}
+		if (count == 0)
+			continue;
+
+		/* see if this is a comment */
+		if (bufline[0] == COMMENT_CHARACTER)
+			continue;
+
+		if (count >= sizeof(line)) {
+			err("line too long, rule skipped '%s:%u'\n", filename, lineno);
+			continue;
+		}
+
+		/* skip backslash and newline from multiline rules */
+		for (i = j = 0; i < count; i++) {
+			if (bufline[i] == '\\' && bufline[i+1] == '\n')
+				continue;
+
+			line[j++] = bufline[i];
+		}
+		line[j] = '\0';
+
+		dbg("read '%s'\n", line);
+		add_to_rules(rules, line, filename, lineno);
+	}
+
+	file_unmap(buf, bufsize);
+	return retval;
+}
+
+int udev_rules_init(struct udev_rules *rules, int resolve_names)
+{
+	struct stat statbuf;
+	char filename[PATH_MAX];
+	LIST_HEAD(name_list);
+	LIST_HEAD(sort_list);
+	struct name_entry *name_loop, *name_tmp;
+	struct name_entry *sort_loop, *sort_tmp;
+	int retval = 0;
+
+	memset(rules, 0x00, sizeof(struct udev_rules));
+	rules->resolve_names = resolve_names;
+
+	if (udev_rules_dir[0] != '\0') {
+		/* custom rules location for testing */
+		add_matching_files(&name_list, udev_rules_dir, RULESFILE_SUFFIX);
+	} else {
+		/* read default rules */
+		add_matching_files(&name_list, RULES_LIB_DIR, RULESFILE_SUFFIX);
+
+		/* read user/custom rules */
+		add_matching_files(&sort_list, RULES_ETC_DIR, RULESFILE_SUFFIX);
+
+		/* read dynamic/temporary rules */
+		strlcpy(filename, udev_root, sizeof(filename));
+		strlcat(filename, "/"RULES_DYN_DIR, sizeof(filename));
+		if (stat(filename, &statbuf) != 0) {
+			create_path(filename);
+			selinux_setfscreatecon(filename, NULL, S_IFDIR|0755);
+			mkdir(filename, 0755);
+			selinux_resetfscreatecon();
+		}
+		add_matching_files(&sort_list, filename, RULESFILE_SUFFIX);
+
+		/* sort all rules files by basename into list of files */
+		list_for_each_entry_safe(sort_loop, sort_tmp, &sort_list, node) {
+			const char *sort_base = strrchr(sort_loop->name, '/');
+
+			if (sort_base == NULL)
+				continue;
+
+			list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
+				const char *name_base = strrchr(name_loop->name, '/');
+
+				if (name_base == NULL)
+					continue;
+
+				if (strcmp(name_base, sort_base) > 0)
+					break;
+			}
+			list_move_tail(&sort_loop->node, &name_loop->node);
+		}
+	}
+
+	/* parse list of files */
+	list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
+		if (stat(name_loop->name, &statbuf) == 0) {
+			if (statbuf.st_size)
+				parse_file(rules, name_loop->name);
+			else
+				dbg("empty rules file '%s'\n", name_loop->name);
+		} else
+			err("could not read '%s': %s\n", name_loop->name, strerror(errno));
+		list_del(&name_loop->node);
+		free(name_loop);
+	}
+
+	return retval;
+}
+
+void udev_rules_cleanup(struct udev_rules *rules)
+{
+	if (rules->buf) {
+		free(rules->buf);
+		rules->buf = NULL;
+	}
+}
+