X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_rules_parse.c;h=d2392c36e054b144907e0c9b080e2cbc36b05ba9;hp=8ef5ffee46431dd3e60510240eeb851d39e0af73;hb=6056d9b3400fe0349d86636cbbf93f069bb5639a;hpb=915fde17387f7245164fbda21a0f5bbc185f7dc2

diff --git a/udev_rules_parse.c b/udev_rules_parse.c
index 8ef5ffee4..d2392c36e 100644
--- a/udev_rules_parse.c
+++ b/udev_rules_parse.c
@@ -104,12 +104,9 @@ static int get_key(char **line, char **key, enum key_operation *operation, char
 			break;
 		if (linepos[0] == '=')
 			break;
-		if (linepos[0] == '+')
-			break;
-		if (linepos[0] == '!')
-			break;
-		if (linepos[0] == ':')
-			break;
+		if ((linepos[0] == '+') || (linepos[0] == '!') || (linepos[0] == ':'))
+			if (linepos[1] == '=')
+				break;
 	}
 
 	/* remember end of key */
@@ -235,6 +232,7 @@ static int add_rule_key_pair(struct udev_rule *rule, struct key_pairs *pairs,
 
 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;
@@ -244,15 +242,12 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 	int physdev = 0;
 	int retval;
 
-	/* get all the keys */
-	rule = calloc(1, sizeof (struct udev_rule) + LINE_SIZE);
-	if (!rule) {
-		err("malloc failed");
-		return -1;
-	}
+	memset(buf, 0x00, sizeof(buf));
+	rule = (struct udev_rule *) buf;
 	linepos = line;
 	valid = 0;
 
+	/* get all the keys */
 	while (1) {
 		char *key;
 		char *value;
@@ -301,7 +296,16 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 				err("invalid SUBSYSTEM operation");
 				goto invalid;
 			}
-			add_rule_key(rule, &rule->subsystem, operation, value);
+			/* 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' "
+					    "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;
 		}
@@ -379,7 +383,7 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 			if (strncmp(attr, "device/", 7) == 0)
 				err("the 'device' link is deprecated and will be removed from a future kernel, "
 				    "please fix it in %s:%u", filename, lineno);
-			else if (strchr(attr, '/') != NULL)
+			else if (strstr(attr, "../") != NULL)
 				err("do not reference parent sysfs directories directly, that may break with a future kernel, "
 				    "please fix it in %s:%u", filename, lineno);
 			if (add_rule_key_pair(rule, &rule->attrs, operation, attr, value) != 0)
@@ -421,20 +425,20 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 
 		if (strncasecmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
 			attr = get_key_attribute(key + sizeof("IMPORT")-1);
-			if (attr && strstr(attr, "program")) {
+			if (attr != NULL && strstr(attr, "program")) {
 				dbg("IMPORT will be executed");
 				rule->import_type  = IMPORT_PROGRAM;
-			} else if (attr && strstr(attr, "file")) {
+			} else if (attr != NULL && strstr(attr, "file")) {
 				dbg("IMPORT will be included as file");
 				rule->import_type  = IMPORT_FILE;
-			} else if (attr && strstr(attr, "parent")) {
+			} else if (attr != NULL && strstr(attr, "parent")) {
 				dbg("IMPORT will include the parent values");
 				rule->import_type = IMPORT_PARENT;
 			} else {
 				/* figure it out if it is executable */
 				char file[PATH_SIZE];
 				char *pos;
-				struct stat stats;
+				struct stat statbuf;
 
 				strlcpy(file, value, sizeof(file));
 				pos = strchr(file, ' ');
@@ -451,7 +455,7 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 				}
 
 				dbg("IMPORT auto mode for '%s'", file);
-				if (!lstat(file, &stats) && (stats.st_mode & S_IXUSR)) {
+				if (!lstat(file, &statbuf) && (statbuf.st_mode & S_IXUSR)) {
 					dbg("IMPORT is executable, will be executed (autotype)");
 					rule->import_type  = IMPORT_PROGRAM;
 				} else {
@@ -464,7 +468,26 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 			continue;
 		}
 
-		if (strcasecmp(key, "RUN") == 0) {
+		if (strncasecmp(key, "TEST", sizeof("TEST")-1) == 0) {
+			if (operation != KEY_OP_MATCH &&
+			    operation != KEY_OP_NOMATCH) {
+				err("invalid TEST operation");
+				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;
@@ -507,7 +530,11 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 		}
 
 		if (strcasecmp(key, "SYMLINK") == 0) {
-			add_rule_key(rule, &rule->symlink, operation, value);
+			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;
 		}
@@ -558,6 +585,8 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 		}
 
 		if (strcasecmp(key, "OPTIONS") == 0) {
+			const char *pos;
+
 			if (strstr(value, "last_rule") != NULL) {
 				dbg("last rule to be applied");
 				rule->last_rule = 1;
@@ -570,6 +599,19 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 				dbg("remove event should be ignored");
 				rule->ignore_remove = 1;
 			}
+			pos = strstr(value, "link_priority=");
+			if (pos != NULL) {
+				rule->link_priority = atoi(&pos[strlen("link_priority=")]);
+				dbg("link priority=%i", rule->link_priority);
+			}
+			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");
 				rule->partitions = DEFAULT_PARTITIONS_COUNT;
@@ -605,11 +647,9 @@ static int add_to_rules(struct udev_rules *rules, char *line, const char *filena
 	memcpy(rules->buf + rules->bufsize, rule, rule_size);
 	rules->bufsize += rule_size;
 exit:
-	free(rule);
 	return 0;
 
 invalid:
-	free(rule);
 	err("invalid rule '%s:%u'", filename, lineno);
 	return -1;
 }
@@ -678,37 +718,69 @@ static int parse_file(struct udev_rules *rules, const char *filename)
 
 int udev_rules_init(struct udev_rules *rules, int resolve_names)
 {
-	struct stat stats;
-	int retval;
+	struct stat statbuf;
+	char filename[PATH_MAX];
+	LIST_HEAD(name_list);
+	LIST_HEAD(dyn_list);
+	struct name_entry *name_loop, *name_tmp;
+	struct name_entry *dyn_loop, *dyn_tmp;
+	int retval = 0;
 
 	memset(rules, 0x00, sizeof(struct udev_rules));
 	rules->resolve_names = resolve_names;
 
-	/* parse rules file or all matching files in directory */
-	if (stat(udev_rules_dir, &stats) != 0)
+	/* read main config from single file or all files in a directory */
+	if (stat(udev_rules_dir, &statbuf) != 0)
 		return -1;
-
-	if ((stats.st_mode & S_IFMT) != S_IFDIR) {
+	if ((statbuf.st_mode & S_IFMT) != S_IFDIR) {
 		dbg("parse single rules file '%s'", udev_rules_dir);
-		retval = parse_file(rules, udev_rules_dir);
+		name_list_add(&name_list, udev_rules_dir, 1);
 	} else {
-		struct name_entry *name_loop, *name_tmp;
-		LIST_HEAD(name_list);
-
 		dbg("parse rules directory '%s'", udev_rules_dir);
 		retval = add_matching_files(&name_list, udev_rules_dir, RULESFILE_SUFFIX);
+	}
+
+	/* read dynamic rules directory */
+	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(&dyn_list, filename, RULESFILE_SUFFIX);
+
+	/* sort dynamic rules files by basename into list of files */
+	list_for_each_entry_safe(dyn_loop, dyn_tmp, &dyn_list, node) {
+		const char *dyn_base = strrchr(dyn_loop->name, '/');
+
+		if (dyn_base == NULL)
+			continue;
 
 		list_for_each_entry_safe(name_loop, name_tmp, &name_list, node) {
-			if (stat(name_loop->name, &stats) == 0) {
-				if (stats.st_size)
-					parse_file(rules, name_loop->name);
-				else
-					dbg("empty rules file '%s'", name_loop->name);
-			} else
-				err("could not read '%s': %s", name_loop->name, strerror(errno));
-			list_del(&name_loop->node);
-			free(name_loop);
+			const char *name_base = strrchr(name_loop->name, '/');
+
+			if (name_base == NULL)
+				continue;
+
+			if (strcmp(name_base, dyn_base) > 0)
+				break;
 		}
+		list_move_tail(&dyn_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'", name_loop->name);
+		} else
+			err("could not read '%s': %s", name_loop->name, strerror(errno));
+		list_del(&name_loop->node);
+		free(name_loop);
 	}
 
 	return retval;
@@ -721,3 +793,4 @@ void udev_rules_cleanup(struct udev_rules *rules)
 		rules->buf = NULL;
 	}
 }
+