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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:49:52 +0000
commit55944e5e40b1be2afc4855d8d2baf4b73d1876b5 (patch)
tree33f869f55a1b149e9b7c2b7e201867ca5dd52992 /src/udev/udev-rules.c
parentInitial commit. (diff)
downloadsystemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.tar.xz
systemd-55944e5e40b1be2afc4855d8d2baf4b73d1876b5.zip
Adding upstream version 255.4.upstream/255.4
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/udev/udev-rules.c')
-rw-r--r--src/udev/udev-rules.c2965
1 files changed, 2965 insertions, 0 deletions
diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
new file mode 100644
index 0000000..5f12002
--- /dev/null
+++ b/src/udev/udev-rules.c
@@ -0,0 +1,2965 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <ctype.h>
+
+#include "alloc-util.h"
+#include "architecture.h"
+#include "conf-files.h"
+#include "conf-parser.h"
+#include "confidential-virt.h"
+#include "constants.h"
+#include "device-private.h"
+#include "device-util.h"
+#include "dirent-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "format-util.h"
+#include "fs-util.h"
+#include "glob-util.h"
+#include "list.h"
+#include "mkdir.h"
+#include "netif-naming-scheme.h"
+#include "nulstr-util.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "proc-cmdline.h"
+#include "socket-util.h"
+#include "stat-util.h"
+#include "string-table.h"
+#include "strv.h"
+#include "strxcpyx.h"
+#include "sysctl-util.h"
+#include "syslog-util.h"
+#include "udev-builtin.h"
+#include "udev-event.h"
+#include "udev-format.h"
+#include "udev-node.h"
+#include "udev-rules.h"
+#include "udev-spawn.h"
+#include "udev-trace.h"
+#include "udev-util.h"
+#include "user-util.h"
+#include "virt.h"
+
+#define RULES_DIRS ((const char* const*) CONF_PATHS_STRV("udev/rules.d"))
+
+typedef enum {
+ OP_MATCH, /* == */
+ OP_NOMATCH, /* != */
+ OP_ADD, /* += */
+ OP_REMOVE, /* -= */
+ OP_ASSIGN, /* = */
+ OP_ASSIGN_FINAL, /* := */
+ _OP_TYPE_MAX,
+ _OP_TYPE_INVALID = -EINVAL,
+} UdevRuleOperatorType;
+
+typedef enum {
+ MATCH_TYPE_EMPTY, /* empty string */
+ MATCH_TYPE_PLAIN, /* no special characters */
+ MATCH_TYPE_PLAIN_WITH_EMPTY, /* no special characters with empty string, e.g., "|foo" */
+ MATCH_TYPE_GLOB, /* shell globs ?,*,[] */
+ MATCH_TYPE_GLOB_WITH_EMPTY, /* shell globs ?,*,[] with empty string, e.g., "|foo*" */
+ MATCH_TYPE_SUBSYSTEM, /* "subsystem", "bus", or "class" */
+ _MATCH_TYPE_MAX,
+ _MATCH_TYPE_INVALID = -EINVAL,
+} UdevRuleMatchType;
+
+typedef enum {
+ SUBST_TYPE_PLAIN, /* no substitution */
+ SUBST_TYPE_FORMAT, /* % or $ */
+ SUBST_TYPE_SUBSYS, /* "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
+ _SUBST_TYPE_MAX,
+ _SUBST_TYPE_INVALID = -EINVAL,
+} UdevRuleSubstituteType;
+
+typedef enum {
+ /* lvalues which take match or nomatch operator */
+ TK_M_ACTION, /* string, device_get_action() */
+ TK_M_DEVPATH, /* path, sd_device_get_devpath() */
+ TK_M_KERNEL, /* string, sd_device_get_sysname() */
+ TK_M_DEVLINK, /* strv, sd_device_get_devlink_first(), sd_device_get_devlink_next() */
+ TK_M_NAME, /* string, name of network interface */
+ TK_M_ENV, /* string, device property, takes key through attribute */
+ TK_M_CONST, /* string, system-specific hard-coded constant */
+ TK_M_TAG, /* strv, sd_device_get_tag_first(), sd_device_get_tag_next() */
+ TK_M_SUBSYSTEM, /* string, sd_device_get_subsystem() */
+ TK_M_DRIVER, /* string, sd_device_get_driver() */
+ TK_M_ATTR, /* string, takes filename through attribute, sd_device_get_sysattr_value(), udev_resolve_subsys_kernel(), etc. */
+ TK_M_SYSCTL, /* string, takes kernel parameter through attribute */
+
+ /* matches parent parameters */
+ TK_M_PARENTS_KERNEL, /* string */
+ TK_M_PARENTS_SUBSYSTEM, /* string */
+ TK_M_PARENTS_DRIVER, /* string */
+ TK_M_PARENTS_ATTR, /* string */
+ TK_M_PARENTS_TAG, /* strv */
+
+ TK_M_TEST, /* path, optionally mode_t can be specified by attribute, test the existence of a file */
+ TK_M_PROGRAM, /* string, execute a program */
+ TK_M_IMPORT_FILE, /* path */
+ TK_M_IMPORT_PROGRAM, /* string, import properties from the result of program */
+ TK_M_IMPORT_BUILTIN, /* string, import properties from the result of built-in command */
+ TK_M_IMPORT_DB, /* string, import properties from database */
+ TK_M_IMPORT_CMDLINE, /* string, kernel command line */
+ TK_M_IMPORT_PARENT, /* string, parent property */
+ TK_M_RESULT, /* string, result of TK_M_PROGRAM */
+
+#define _TK_M_MAX (TK_M_RESULT + 1)
+#define _TK_A_MIN _TK_M_MAX
+
+ /* lvalues which take one of assign operators */
+ TK_A_OPTIONS_STRING_ESCAPE_NONE, /* no argument */
+ TK_A_OPTIONS_STRING_ESCAPE_REPLACE, /* no argument */
+ TK_A_OPTIONS_DB_PERSIST, /* no argument */
+ TK_A_OPTIONS_INOTIFY_WATCH, /* boolean */
+ TK_A_OPTIONS_DEVLINK_PRIORITY, /* int */
+ TK_A_OPTIONS_LOG_LEVEL, /* string of log level or "reset" */
+ TK_A_OWNER, /* user name */
+ TK_A_GROUP, /* group name */
+ TK_A_MODE, /* mode string */
+ TK_A_OWNER_ID, /* uid_t */
+ TK_A_GROUP_ID, /* gid_t */
+ TK_A_MODE_ID, /* mode_t */
+ TK_A_TAG, /* string */
+ TK_A_OPTIONS_STATIC_NODE, /* device path, /dev/... */
+ TK_A_SECLABEL, /* string with attribute */
+ TK_A_ENV, /* string with attribute */
+ TK_A_NAME, /* ifname */
+ TK_A_DEVLINK, /* string */
+ TK_A_ATTR, /* string with attribute */
+ TK_A_SYSCTL, /* string with attribute */
+ TK_A_RUN_BUILTIN, /* string */
+ TK_A_RUN_PROGRAM, /* string */
+
+ _TK_TYPE_MAX,
+ _TK_TYPE_INVALID = -EINVAL,
+} UdevRuleTokenType;
+
+typedef enum {
+ LINE_HAS_NAME = 1 << 0, /* has NAME= */
+ LINE_HAS_DEVLINK = 1 << 1, /* has SYMLINK=, OWNER=, GROUP= or MODE= */
+ LINE_HAS_STATIC_NODE = 1 << 2, /* has OPTIONS=static_node */
+ LINE_HAS_GOTO = 1 << 3, /* has GOTO= */
+ LINE_HAS_LABEL = 1 << 4, /* has LABEL= */
+ LINE_UPDATE_SOMETHING = 1 << 5, /* has other TK_A_* or TK_M_IMPORT tokens */
+ LINE_IS_REFERENCED = 1 << 6, /* is referenced by GOTO */
+} UdevRuleLineType;
+
+typedef struct UdevRuleFile UdevRuleFile;
+typedef struct UdevRuleLine UdevRuleLine;
+typedef struct UdevRuleToken UdevRuleToken;
+
+struct UdevRuleToken {
+ UdevRuleTokenType type:8;
+ UdevRuleOperatorType op:8;
+ UdevRuleMatchType match_type:8;
+ UdevRuleSubstituteType attr_subst_type:7;
+ bool attr_match_remove_trailing_whitespace:1;
+ const char *value;
+ void *data;
+
+ UdevRuleLine *rule_line;
+ LIST_FIELDS(UdevRuleToken, tokens);
+};
+
+struct UdevRuleLine {
+ char *line;
+ unsigned line_number;
+ UdevRuleLineType type;
+
+ const char *label;
+ const char *goto_label;
+ UdevRuleLine *goto_line;
+
+ UdevRuleFile *rule_file;
+ LIST_HEAD(UdevRuleToken, tokens);
+ LIST_FIELDS(UdevRuleLine, rule_lines);
+};
+
+struct UdevRuleFile {
+ char *filename;
+ unsigned issues; /* used by "udevadm verify" */
+
+ UdevRules *rules;
+ LIST_HEAD(UdevRuleLine, rule_lines);
+ LIST_FIELDS(UdevRuleFile, rule_files);
+};
+
+struct UdevRules {
+ ResolveNameTiming resolve_name_timing;
+ Hashmap *known_users;
+ Hashmap *known_groups;
+ Hashmap *stats_by_path;
+ LIST_HEAD(UdevRuleFile, rule_files);
+};
+
+#define LINE_GET_RULES(line) \
+ ASSERT_PTR(ASSERT_PTR(ASSERT_PTR(line)->rule_file)->rules)
+
+/*** Logging helpers ***/
+
+#define log_udev_rule_internal(device, file, line_nr, level, error, fmt, ...) \
+ ({ \
+ int _lv = (level); \
+ sd_device *_dev = (device); \
+ UdevRuleFile *_f = (file); \
+ const char *_n = _f ? _f->filename : NULL; \
+ \
+ if (!_dev && _f) \
+ _f->issues |= (1U << _lv); \
+ \
+ log_device_full_errno_zerook( \
+ _dev, _lv, error, "%s:%u " fmt, \
+ strna(_n), line_nr, \
+ ##__VA_ARGS__); \
+ })
+
+/* Mainly used when applying tokens to the event device. */
+#define log_event_full_errno_zerook(device, token, ...) \
+ ({ \
+ UdevRuleToken *_t = (token); \
+ UdevRuleLine *_l = _t ? _t->rule_line : NULL; \
+ \
+ log_udev_rule_internal( \
+ device, \
+ _l ? _l->rule_file : NULL, \
+ _l ? _l->line_number : 0, \
+ __VA_ARGS__); \
+ })
+
+#define log_event_full_errno(device, token, level, error, ...) \
+ ({ \
+ int _error = (error); \
+ ASSERT_NON_ZERO(_error); \
+ log_event_full_errno_zerook( \
+ device, token, level, _error, ##__VA_ARGS__); \
+ })
+
+#define log_event_full(device, token, level, ...) (void) log_event_full_errno_zerook(device, token, level, 0, __VA_ARGS__)
+
+#define log_event_debug(device, token, ...) log_event_full(device, token, LOG_DEBUG, __VA_ARGS__)
+#define log_event_info(device, token, ...) log_event_full(device, token, LOG_INFO, __VA_ARGS__)
+#define log_event_notice(device, token, ...) log_event_full(device, token, LOG_NOTICE, __VA_ARGS__)
+#define log_event_warning(device, token, ...) log_event_full(device, token, LOG_WARNING, __VA_ARGS__)
+#define log_event_error(device, token, ...) log_event_full(device, token, LOG_ERR, __VA_ARGS__)
+
+#define log_event_debug_errno(device, token, error, ...) log_event_full_errno(device, token, LOG_DEBUG, error, __VA_ARGS__)
+#define log_event_info_errno(device, token, error, ...) log_event_full_errno(device, token, LOG_INFO, error, __VA_ARGS__)
+#define log_event_notice_errno(device, token, error, ...) log_event_full_errno(device, token, LOG_NOTICE, error, __VA_ARGS__)
+#define log_event_warning_errno(device, token, error, ...) log_event_full_errno(device, token, LOG_WARNING, error, __VA_ARGS__)
+#define log_event_error_errno(device, token, error, ...) log_event_full_errno(device, token, LOG_ERR, error, __VA_ARGS__)
+
+/* Mainly used when parsing .rules files. */
+#define log_file_full_errno_zerook(...) \
+ log_udev_rule_internal(NULL, __VA_ARGS__)
+
+#define log_file_error(file, line_nr, ...) \
+ log_file_full_errno_zerook(file, line_nr, LOG_ERR, 0, __VA_ARGS__)
+
+#define log_line_full_errno_zerook(line, ...) \
+ ({ \
+ UdevRuleLine *_l = (line); \
+ log_file_full_errno_zerook( \
+ _l ? _l->rule_file : NULL, \
+ _l ? _l->line_number : 0, \
+ __VA_ARGS__); \
+ })
+
+#define log_line_full_errno(line, level, error, ...) \
+ ({ \
+ int _error = (error); \
+ ASSERT_NON_ZERO(_error); \
+ log_line_full_errno_zerook( \
+ line, level, _error, ##__VA_ARGS__); \
+ })
+
+#define log_line_full(line, level, ...) (void) log_line_full_errno_zerook(line, level, 0, __VA_ARGS__)
+
+#define log_line_debug(line, ...) log_line_full(line, LOG_DEBUG, __VA_ARGS__)
+#define log_line_info(line, ...) log_line_full(line, LOG_INFO, __VA_ARGS__)
+#define log_line_notice(line, ...) log_line_full(line, LOG_NOTICE, __VA_ARGS__)
+#define log_line_warning(line, ...) log_line_full(line, LOG_WARNING, __VA_ARGS__)
+#define log_line_error(line, ...) log_line_full(line, LOG_ERR, __VA_ARGS__)
+
+#define log_line_debug_errno(line, error, ...) log_line_full_errno(line, LOG_DEBUG, error, __VA_ARGS__)
+#define log_line_info_errno(line, error, ...) log_line_full_errno(line, LOG_INFO, error, __VA_ARGS__)
+#define log_line_notice_errno(line, error, ...) log_line_full_errno(line, LOG_NOTICE, error, __VA_ARGS__)
+#define log_line_warning_errno(line, error, ...) log_line_full_errno(line, LOG_WARNING, error, __VA_ARGS__)
+#define log_line_error_errno(line, error, ...) log_line_full_errno(line, LOG_ERR, error, __VA_ARGS__)
+
+#define _log_line_invalid_token(line, key, type) \
+ log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \
+ "Invalid %s for %s.", type, key)
+
+#define log_line_invalid_op(line, key) _log_line_invalid_token(line, key, "operator")
+#define log_line_invalid_attr(line, key) _log_line_invalid_token(line, key, "attribute")
+
+#define log_line_invalid_attr_format(line, key, attr, offset, hint) \
+ log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \
+ "Invalid attribute \"%s\" for %s (char %zu: %s), ignoring.", \
+ attr, key, offset, hint)
+#define log_line_invalid_value(line, key, value, offset, hint) \
+ log_line_error_errno(line, SYNTHETIC_ERRNO(EINVAL), \
+ "Invalid value \"%s\" for %s (char %zu: %s), ignoring.", \
+ value, key, offset, hint)
+
+static void log_unknown_owner(sd_device *dev, UdevRuleLine *line, int error, const char *entity, const char *name) {
+ assert(line);
+ ASSERT_NON_ZERO(error);
+
+ if (IN_SET(abs(error), ENOENT, ESRCH))
+ log_udev_rule_internal(dev, line->rule_file, line->line_number, LOG_ERR, error,
+ "Unknown %s '%s', ignoring.", entity, name);
+ else
+ log_udev_rule_internal(dev, line->rule_file, line->line_number, LOG_ERR, error,
+ "Failed to resolve %s '%s', ignoring: %m", entity, name);
+}
+
+static void log_event_truncated(
+ sd_device *dev,
+ UdevRuleToken *token,
+ const char *what,
+ const char *format,
+ const char *key,
+ bool is_match) {
+
+ if (is_match)
+ log_event_debug(dev, token,
+ "The %s is truncated while substituting into '%s', "
+ "assuming the %s key does not match.",
+ what, format, key);
+ else
+ log_event_warning(dev, token,
+ "The %s is truncated while substituting into '%s', "
+ "refusing to apply the %s key.",
+ what, format, key);
+}
+
+/*** Other functions ***/
+
+static UdevRuleToken *udev_rule_token_free(UdevRuleToken *token) {
+ if (!token)
+ return NULL;
+
+ if (token->rule_line)
+ LIST_REMOVE(tokens, token->rule_line->tokens, token);
+
+ return mfree(token);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleToken*, udev_rule_token_free);
+
+static void udev_rule_line_clear_tokens(UdevRuleLine *rule_line) {
+ assert(rule_line);
+
+ LIST_FOREACH(tokens, i, rule_line->tokens)
+ udev_rule_token_free(i);
+}
+
+static UdevRuleLine *udev_rule_line_free(UdevRuleLine *rule_line) {
+ if (!rule_line)
+ return NULL;
+
+ udev_rule_line_clear_tokens(rule_line);
+
+ if (rule_line->rule_file)
+ LIST_REMOVE(rule_lines, rule_line->rule_file->rule_lines, rule_line);
+
+ free(rule_line->line);
+ return mfree(rule_line);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleLine*, udev_rule_line_free);
+
+static UdevRuleFile *udev_rule_file_free(UdevRuleFile *rule_file) {
+ if (!rule_file)
+ return NULL;
+
+ LIST_FOREACH(rule_lines, i, rule_file->rule_lines)
+ udev_rule_line_free(i);
+
+ if (rule_file->rules)
+ LIST_REMOVE(rule_files, rule_file->rules->rule_files, rule_file);
+
+ free(rule_file->filename);
+ return mfree(rule_file);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(UdevRuleFile*, udev_rule_file_free);
+
+UdevRules *udev_rules_free(UdevRules *rules) {
+ if (!rules)
+ return NULL;
+
+ LIST_FOREACH(rule_files, i, rules->rule_files)
+ udev_rule_file_free(i);
+
+ hashmap_free_free_key(rules->known_users);
+ hashmap_free_free_key(rules->known_groups);
+ hashmap_free(rules->stats_by_path);
+ return mfree(rules);
+}
+
+static int rule_resolve_user(UdevRuleLine *rule_line, const char *name, uid_t *ret) {
+ Hashmap **known_users = &LINE_GET_RULES(rule_line)->known_users;
+ _cleanup_free_ char *n = NULL;
+ uid_t uid;
+ void *val;
+ int r;
+
+ assert(name);
+ assert(ret);
+
+ val = hashmap_get(*known_users, name);
+ if (val) {
+ *ret = PTR_TO_UID(val);
+ return 0;
+ }
+
+ r = get_user_creds(&name, &uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
+ if (r < 0) {
+ log_unknown_owner(NULL, rule_line, r, "user", name);
+ *ret = UID_INVALID;
+ return 0;
+ }
+
+ n = strdup(name);
+ if (!n)
+ return -ENOMEM;
+
+ r = hashmap_ensure_put(known_users, &string_hash_ops, n, UID_TO_PTR(uid));
+ if (r < 0)
+ return r;
+
+ TAKE_PTR(n);
+ *ret = uid;
+ return 0;
+}
+
+static int rule_resolve_group(UdevRuleLine *rule_line, const char *name, gid_t *ret) {
+ Hashmap **known_groups = &LINE_GET_RULES(rule_line)->known_groups;
+ _cleanup_free_ char *n = NULL;
+ gid_t gid;
+ void *val;
+ int r;
+
+ assert(name);
+ assert(ret);
+
+ val = hashmap_get(*known_groups, name);
+ if (val) {
+ *ret = PTR_TO_GID(val);
+ return 0;
+ }
+
+ r = get_group_creds(&name, &gid, USER_CREDS_ALLOW_MISSING);
+ if (r < 0) {
+ log_unknown_owner(NULL, rule_line, r, "group", name);
+ *ret = GID_INVALID;
+ return 0;
+ }
+
+ n = strdup(name);
+ if (!n)
+ return -ENOMEM;
+
+ r = hashmap_ensure_put(known_groups, &string_hash_ops, n, GID_TO_PTR(gid));
+ if (r < 0)
+ return r;
+
+ TAKE_PTR(n);
+ *ret = gid;
+ return 0;
+}
+
+static UdevRuleSubstituteType rule_get_substitution_type(const char *str) {
+ assert(str);
+
+ if (str[0] == '[')
+ return SUBST_TYPE_SUBSYS;
+ if (strchr(str, '%') || strchr(str, '$'))
+ return SUBST_TYPE_FORMAT;
+ return SUBST_TYPE_PLAIN;
+}
+
+static bool type_has_nulstr_value(UdevRuleTokenType type) {
+ return type < TK_M_TEST || type == TK_M_RESULT;
+}
+
+static int rule_line_add_token(UdevRuleLine *rule_line, UdevRuleTokenType type, UdevRuleOperatorType op, char *value, void *data) {
+ _cleanup_(udev_rule_token_freep) UdevRuleToken *token = NULL;
+ UdevRuleMatchType match_type = _MATCH_TYPE_INVALID;
+ UdevRuleSubstituteType subst_type = _SUBST_TYPE_INVALID;
+ bool remove_trailing_whitespace = false;
+ size_t len;
+
+ assert(rule_line);
+ assert(type >= 0 && type < _TK_TYPE_MAX);
+ assert(op >= 0 && op < _OP_TYPE_MAX);
+
+ if (type < _TK_M_MAX) {
+ assert(value);
+ assert(IN_SET(op, OP_MATCH, OP_NOMATCH));
+
+ if (type == TK_M_SUBSYSTEM && STR_IN_SET(value, "subsystem", "bus", "class"))
+ match_type = MATCH_TYPE_SUBSYSTEM;
+ else if (isempty(value))
+ match_type = MATCH_TYPE_EMPTY;
+ else if (streq(value, "?*")) {
+ /* Convert KEY=="?*" -> KEY!="" */
+ match_type = MATCH_TYPE_EMPTY;
+ op = op == OP_MATCH ? OP_NOMATCH : OP_MATCH;
+ } else if (string_is_glob(value))
+ match_type = MATCH_TYPE_GLOB;
+ else
+ match_type = MATCH_TYPE_PLAIN;
+
+ if (type_has_nulstr_value(type)) {
+ /* Convert value string to nulstr. */
+ bool bar = true, empty = false;
+ char *a, *b;
+
+ for (a = b = value; *a != '\0'; a++) {
+ if (*a != '|') {
+ *b++ = *a;
+ bar = false;
+ } else {
+ if (bar)
+ empty = true;
+ else
+ *b++ = '\0';
+ bar = true;
+ }
+ }
+ *b = '\0';
+
+ /* Make sure the value is end, so NULSTR_FOREACH can read correct match */
+ if (b < a)
+ b[1] = '\0';
+
+ if (bar)
+ empty = true;
+
+ if (empty) {
+ if (match_type == MATCH_TYPE_GLOB)
+ match_type = MATCH_TYPE_GLOB_WITH_EMPTY;
+ if (match_type == MATCH_TYPE_PLAIN)
+ match_type = MATCH_TYPE_PLAIN_WITH_EMPTY;
+ }
+ }
+ }
+
+ if (IN_SET(type, TK_M_ATTR, TK_M_PARENTS_ATTR)) {
+ assert(value);
+ assert(data);
+
+ len = strlen(value);
+ if (len > 0 && !isspace(value[len - 1]))
+ remove_trailing_whitespace = true;
+
+ subst_type = rule_get_substitution_type(data);
+ }
+
+ token = new(UdevRuleToken, 1);
+ if (!token)
+ return -ENOMEM;
+
+ *token = (UdevRuleToken) {
+ .type = type,
+ .op = op,
+ .value = value,
+ .data = data,
+ .match_type = match_type,
+ .attr_subst_type = subst_type,
+ .attr_match_remove_trailing_whitespace = remove_trailing_whitespace,
+ .rule_line = rule_line,
+ };
+
+ LIST_APPEND(tokens, rule_line->tokens, token);
+
+ if (token->type == TK_A_NAME)
+ SET_FLAG(rule_line->type, LINE_HAS_NAME, true);
+
+ else if (IN_SET(token->type, TK_A_DEVLINK,
+ TK_A_OWNER, TK_A_GROUP, TK_A_MODE,
+ TK_A_OWNER_ID, TK_A_GROUP_ID, TK_A_MODE_ID))
+ SET_FLAG(rule_line->type, LINE_HAS_DEVLINK, true);
+
+ else if (token->type == TK_A_OPTIONS_STATIC_NODE)
+ SET_FLAG(rule_line->type, LINE_HAS_STATIC_NODE, true);
+
+ else if (token->type >= _TK_A_MIN ||
+ IN_SET(token->type, TK_M_PROGRAM,
+ TK_M_IMPORT_FILE, TK_M_IMPORT_PROGRAM, TK_M_IMPORT_BUILTIN,
+ TK_M_IMPORT_DB, TK_M_IMPORT_CMDLINE, TK_M_IMPORT_PARENT))
+ SET_FLAG(rule_line->type, LINE_UPDATE_SOMETHING, true);
+
+ TAKE_PTR(token);
+ return 0;
+}
+
+static void check_value_format_and_warn(UdevRuleLine *line, const char *key, const char *value, bool nonempty) {
+ size_t offset;
+ const char *hint;
+
+ if (nonempty && isempty(value))
+ log_line_invalid_value(line, key, value, (size_t) 0, "empty value");
+ else if (udev_check_format(value, &offset, &hint) < 0)
+ log_line_invalid_value(line, key, value, offset + 1, hint);
+}
+
+static int check_attr_format_and_warn(UdevRuleLine *line, const char *key, const char *value) {
+ size_t offset;
+ const char *hint;
+
+ if (isempty(value))
+ return log_line_invalid_attr(line, key);
+ if (udev_check_format(value, &offset, &hint) < 0)
+ log_line_invalid_attr_format(line, key, value, offset + 1, hint);
+ return 0;
+}
+
+static int parse_token(UdevRuleLine *rule_line, const char *key, char *attr, UdevRuleOperatorType op, char *value) {
+ ResolveNameTiming resolve_name_timing = LINE_GET_RULES(rule_line)->resolve_name_timing;
+ bool is_match = IN_SET(op, OP_MATCH, OP_NOMATCH);
+ int r;
+
+ assert(key);
+ assert(value);
+
+ if (streq(key, "ACTION")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_ACTION, op, value, NULL);
+ } else if (streq(key, "DEVPATH")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_DEVPATH, op, value, NULL);
+ } else if (streq(key, "KERNEL")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_KERNEL, op, value, NULL);
+ } else if (streq(key, "SYMLINK")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match) {
+ check_value_format_and_warn(rule_line, key, value, false);
+ r = rule_line_add_token(rule_line, TK_A_DEVLINK, op, value, NULL);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_DEVLINK, op, value, NULL);
+ } else if (streq(key, "NAME")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ADD) {
+ log_line_warning(rule_line, "%s key takes '==', '!=', '=', or ':=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (!is_match) {
+ if (streq(value, "%k"))
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL),
+ "Ignoring NAME=\"%%k\", as it will take no effect.");
+ if (isempty(value))
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL),
+ "Ignoring NAME=\"\", as udev will not delete any network interfaces.");
+ check_value_format_and_warn(rule_line, key, value, false);
+
+ r = rule_line_add_token(rule_line, TK_A_NAME, op, value, NULL);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_NAME, op, value, NULL);
+ } else if (streq(key, "ENV")) {
+ if (isempty(attr))
+ return log_line_invalid_attr(rule_line, key);
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ASSIGN_FINAL) {
+ log_line_warning(rule_line, "%s key takes '==', '!=', '=', or '+=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (!is_match) {
+ if (STR_IN_SET(attr,
+ "ACTION", "DEVLINKS", "DEVNAME", "DEVPATH", "DEVTYPE", "DRIVER",
+ "IFINDEX", "MAJOR", "MINOR", "SEQNUM", "SUBSYSTEM", "TAGS"))
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL),
+ "Invalid ENV attribute. '%s' cannot be set.", attr);
+
+ check_value_format_and_warn(rule_line, key, value, false);
+
+ r = rule_line_add_token(rule_line, TK_A_ENV, op, value, attr);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_ENV, op, value, attr);
+ } else if (streq(key, "CONST")) {
+ if (isempty(attr) || !STR_IN_SET(attr, "arch", "virt"))
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+ r = rule_line_add_token(rule_line, TK_M_CONST, op, value, attr);
+ } else if (streq(key, "TAG")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (op == OP_ASSIGN_FINAL) {
+ log_line_warning(rule_line, "%s key takes '==', '!=', '=', or '+=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (!is_match) {
+ check_value_format_and_warn(rule_line, key, value, true);
+
+ r = rule_line_add_token(rule_line, TK_A_TAG, op, value, NULL);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_TAG, op, value, NULL);
+ } else if (streq(key, "SUBSYSTEM")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ if (STR_IN_SET(value, "bus", "class"))
+ log_line_warning(rule_line, "\"%s\" must be specified as \"subsystem\".", value);
+
+ r = rule_line_add_token(rule_line, TK_M_SUBSYSTEM, op, value, NULL);
+ } else if (streq(key, "DRIVER")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_DRIVER, op, value, NULL);
+ } else if (streq(key, "ATTR")) {
+ r = check_attr_format_and_warn(rule_line, key, attr);
+ if (r < 0)
+ return r;
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) {
+ log_line_warning(rule_line, "%s key takes '==', '!=', or '=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (!is_match) {
+ check_value_format_and_warn(rule_line, key, value, false);
+ r = rule_line_add_token(rule_line, TK_A_ATTR, op, value, attr);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_ATTR, op, value, attr);
+ } else if (streq(key, "SYSCTL")) {
+ r = check_attr_format_and_warn(rule_line, key, attr);
+ if (r < 0)
+ return r;
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (IN_SET(op, OP_ADD, OP_ASSIGN_FINAL)) {
+ log_line_warning(rule_line, "%s key takes '==', '!=', or '=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (!is_match) {
+ check_value_format_and_warn(rule_line, key, value, false);
+ r = rule_line_add_token(rule_line, TK_A_SYSCTL, op, value, attr);
+ } else
+ r = rule_line_add_token(rule_line, TK_M_SYSCTL, op, value, attr);
+ } else if (streq(key, "KERNELS")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_PARENTS_KERNEL, op, value, NULL);
+ } else if (streq(key, "SUBSYSTEMS")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_PARENTS_SUBSYSTEM, op, value, NULL);
+ } else if (streq(key, "DRIVERS")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_PARENTS_DRIVER, op, value, NULL);
+ } else if (streq(key, "ATTRS")) {
+ r = check_attr_format_and_warn(rule_line, key, attr);
+ if (r < 0)
+ return r;
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ if (startswith(attr, "device/"))
+ log_line_warning(rule_line, "'device' link may not be available in future kernels.");
+ if (strstr(attr, "../"))
+ log_line_warning(rule_line, "Direct reference to parent sysfs directory, may break in future kernels.");
+
+ r = rule_line_add_token(rule_line, TK_M_PARENTS_ATTR, op, value, attr);
+ } else if (streq(key, "TAGS")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_PARENTS_TAG, op, value, NULL);
+ } else if (streq(key, "TEST")) {
+ mode_t mode = MODE_INVALID;
+
+ if (!isempty(attr)) {
+ r = parse_mode(attr, &mode);
+ if (r < 0)
+ return log_line_error_errno(rule_line, r, "Failed to parse mode '%s': %m", attr);
+ }
+ check_value_format_and_warn(rule_line, key, value, true);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_TEST, op, value, MODE_TO_PTR(mode));
+ } else if (streq(key, "PROGRAM")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ check_value_format_and_warn(rule_line, key, value, true);
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (!is_match)
+ op = OP_MATCH;
+
+ r = rule_line_add_token(rule_line, TK_M_PROGRAM, op, value, NULL);
+ } else if (streq(key, "IMPORT")) {
+ if (isempty(attr))
+ return log_line_invalid_attr(rule_line, key);
+ check_value_format_and_warn(rule_line, key, value, true);
+ if (op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (!is_match)
+ op = OP_MATCH;
+
+ if (streq(attr, "file"))
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_FILE, op, value, NULL);
+ else if (streq(attr, "program")) {
+ UdevBuiltinCommand cmd;
+
+ cmd = udev_builtin_lookup(value);
+ if (cmd >= 0) {
+ log_line_debug(rule_line, "Found builtin command '%s' for %s, replacing attribute.", value, key);
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd));
+ } else
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_PROGRAM, op, value, NULL);
+ } else if (streq(attr, "builtin")) {
+ UdevBuiltinCommand cmd;
+
+ cmd = udev_builtin_lookup(value);
+ if (cmd < 0)
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL),
+ "Unknown builtin command: %s", value);
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd));
+ } else if (streq(attr, "db"))
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_DB, op, value, NULL);
+ else if (streq(attr, "cmdline"))
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_CMDLINE, op, value, NULL);
+ else if (streq(attr, "parent"))
+ r = rule_line_add_token(rule_line, TK_M_IMPORT_PARENT, op, value, NULL);
+ else
+ return log_line_invalid_attr(rule_line, key);
+ } else if (streq(key, "RESULT")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (!is_match)
+ return log_line_invalid_op(rule_line, key);
+
+ r = rule_line_add_token(rule_line, TK_M_RESULT, op, value, NULL);
+ } else if (streq(key, "OPTIONS")) {
+ char *tmp;
+
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ADD)
+ op = OP_ASSIGN;
+
+ if (streq(value, "string_escape=none"))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_NONE, op, NULL, NULL);
+ else if (streq(value, "string_escape=replace"))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_STRING_ESCAPE_REPLACE, op, NULL, NULL);
+ else if (streq(value, "db_persist"))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_DB_PERSIST, op, NULL, NULL);
+ else if (streq(value, "watch"))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(1));
+ else if (streq(value, "nowatch"))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_INOTIFY_WATCH, op, NULL, INT_TO_PTR(0));
+ else if ((tmp = startswith(value, "static_node=")))
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_STATIC_NODE, op, tmp, NULL);
+ else if ((tmp = startswith(value, "link_priority="))) {
+ int prio;
+
+ r = safe_atoi(tmp, &prio);
+ if (r < 0)
+ return log_line_error_errno(rule_line, r, "Failed to parse link priority '%s': %m", tmp);
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_DEVLINK_PRIORITY, op, NULL, INT_TO_PTR(prio));
+ } else if ((tmp = startswith(value, "log_level="))) {
+ int level;
+
+ if (streq(tmp, "reset"))
+ level = -1;
+ else {
+ level = log_level_from_string(tmp);
+ if (level < 0)
+ return log_line_error_errno(rule_line, level, "Failed to parse log level '%s': %m", tmp);
+ }
+ r = rule_line_add_token(rule_line, TK_A_OPTIONS_LOG_LEVEL, op, NULL, INT_TO_PTR(level));
+ } else {
+ log_line_warning(rule_line, "Invalid value for OPTIONS key, ignoring: '%s'", value);
+ return 0;
+ }
+ } else if (streq(key, "OWNER")) {
+ uid_t uid;
+
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ADD) {
+ log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (parse_uid(value, &uid) >= 0)
+ r = rule_line_add_token(rule_line, TK_A_OWNER_ID, op, NULL, UID_TO_PTR(uid));
+ else if (resolve_name_timing == RESOLVE_NAME_EARLY &&
+ rule_get_substitution_type(value) == SUBST_TYPE_PLAIN) {
+ r = rule_resolve_user(rule_line, value, &uid);
+ if (r < 0)
+ return log_line_error_errno(rule_line, r, "Failed to resolve user name '%s': %m", value);
+
+ r = rule_line_add_token(rule_line, TK_A_OWNER_ID, op, NULL, UID_TO_PTR(uid));
+ } else if (resolve_name_timing != RESOLVE_NAME_NEVER) {
+ check_value_format_and_warn(rule_line, key, value, true);
+ r = rule_line_add_token(rule_line, TK_A_OWNER, op, value, NULL);
+ } else {
+ log_line_debug(rule_line, "User name resolution is disabled, ignoring %s=\"%s\".", key, value);
+ return 0;
+ }
+ } else if (streq(key, "GROUP")) {
+ gid_t gid;
+
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ADD) {
+ log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (parse_gid(value, &gid) >= 0)
+ r = rule_line_add_token(rule_line, TK_A_GROUP_ID, op, NULL, GID_TO_PTR(gid));
+ else if (resolve_name_timing == RESOLVE_NAME_EARLY &&
+ rule_get_substitution_type(value) == SUBST_TYPE_PLAIN) {
+ r = rule_resolve_group(rule_line, value, &gid);
+ if (r < 0)
+ return log_line_error_errno(rule_line, r, "Failed to resolve group name '%s': %m", value);
+
+ r = rule_line_add_token(rule_line, TK_A_GROUP_ID, op, NULL, GID_TO_PTR(gid));
+ } else if (resolve_name_timing != RESOLVE_NAME_NEVER) {
+ check_value_format_and_warn(rule_line, key, value, true);
+ r = rule_line_add_token(rule_line, TK_A_GROUP, op, value, NULL);
+ } else {
+ log_line_debug(rule_line, "Resolving group name is disabled, ignoring GROUP=\"%s\".", value);
+ return 0;
+ }
+ } else if (streq(key, "MODE")) {
+ mode_t mode;
+
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ADD) {
+ log_line_warning(rule_line, "%s key takes '=' or ':=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ if (parse_mode(value, &mode) >= 0)
+ r = rule_line_add_token(rule_line, TK_A_MODE_ID, op, NULL, MODE_TO_PTR(mode));
+ else {
+ check_value_format_and_warn(rule_line, key, value, true);
+ r = rule_line_add_token(rule_line, TK_A_MODE, op, value, NULL);
+ }
+ } else if (streq(key, "SECLABEL")) {
+ if (isempty(attr))
+ return log_line_invalid_attr(rule_line, key);
+ check_value_format_and_warn(rule_line, key, value, true);
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ if (op == OP_ASSIGN_FINAL) {
+ log_line_warning(rule_line, "%s key takes '=' or '+=' operator, assuming '='.", key);
+ op = OP_ASSIGN;
+ }
+
+ r = rule_line_add_token(rule_line, TK_A_SECLABEL, op, value, attr);
+ } else if (streq(key, "RUN")) {
+ if (is_match || op == OP_REMOVE)
+ return log_line_invalid_op(rule_line, key);
+ check_value_format_and_warn(rule_line, key, value, true);
+ if (!attr || streq(attr, "program"))
+ r = rule_line_add_token(rule_line, TK_A_RUN_PROGRAM, op, value, NULL);
+ else if (streq(attr, "builtin")) {
+ UdevBuiltinCommand cmd;
+
+ cmd = udev_builtin_lookup(value);
+ if (cmd < 0)
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL),
+ "Unknown builtin command '%s', ignoring.", value);
+ r = rule_line_add_token(rule_line, TK_A_RUN_BUILTIN, op, value, UDEV_BUILTIN_CMD_TO_PTR(cmd));
+ } else
+ return log_line_invalid_attr(rule_line, key);
+ } else if (streq(key, "GOTO")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (op != OP_ASSIGN)
+ return log_line_invalid_op(rule_line, key);
+ if (FLAGS_SET(rule_line->type, LINE_HAS_GOTO)) {
+ log_line_warning(rule_line, "Contains multiple GOTO keys, ignoring GOTO=\"%s\".", value);
+ return 0;
+ }
+
+ rule_line->goto_label = value;
+ SET_FLAG(rule_line->type, LINE_HAS_GOTO, true);
+ return 1;
+ } else if (streq(key, "LABEL")) {
+ if (attr)
+ return log_line_invalid_attr(rule_line, key);
+ if (op != OP_ASSIGN)
+ return log_line_invalid_op(rule_line, key);
+ if (FLAGS_SET(rule_line->type, LINE_HAS_LABEL))
+ log_line_warning(rule_line, "Contains multiple LABEL keys, ignoring LABEL=\"%s\".",
+ rule_line->label);
+
+ rule_line->label = value;
+ SET_FLAG(rule_line->type, LINE_HAS_LABEL, true);
+ return 1;
+ } else
+ return log_line_error_errno(rule_line, SYNTHETIC_ERRNO(EINVAL), "Invalid key '%s'.", key);
+ if (r < 0)
+ return log_oom();
+
+ return 1;
+}
+
+static UdevRuleOperatorType parse_operator(const char *op) {
+ assert(op);
+
+ if (startswith(op, "=="))
+ return OP_MATCH;
+ if (startswith(op, "!="))
+ return OP_NOMATCH;
+ if (startswith(op, "+="))
+ return OP_ADD;
+ if (startswith(op, "-="))
+ return OP_REMOVE;
+ if (startswith(op, "="))
+ return OP_ASSIGN;
+ if (startswith(op, ":="))
+ return OP_ASSIGN_FINAL;
+
+ return _OP_TYPE_INVALID;
+}
+
+static void check_token_delimiters(UdevRuleLine *rule_line, const char *line) {
+ assert(rule_line);
+
+ size_t n_comma = 0;
+ bool ws_before_comma = false, ws_after_comma = false;
+ const char *p;
+
+ for (p = line; !isempty(p); ++p) {
+ if (*p == ',')
+ ++n_comma;
+ else if (strchr(WHITESPACE, *p)) {
+ if (n_comma > 0)
+ ws_after_comma = true;
+ else
+ ws_before_comma = true;
+ } else
+ break;
+ }
+
+ if (line == rule_line->line) {
+ /* this is the first token of the rule */
+ if (n_comma > 0)
+ log_line_notice(rule_line, "style: stray leading comma.");
+ } else if (isempty(p)) {
+ /* there are no more tokens in the rule */
+ if (n_comma > 0)
+ log_line_notice(rule_line, "style: stray trailing comma.");
+ } else {
+ /* single comma is expected */
+ if (n_comma == 0)
+ log_line_notice(rule_line, "style: a comma between tokens is expected.");
+ else if (n_comma > 1)
+ log_line_notice(rule_line, "style: more than one comma between tokens.");
+
+ /* whitespace after comma is expected */
+ if (n_comma > 0) {
+ if (ws_before_comma)
+ log_line_notice(rule_line, "style: stray whitespace before comma.");
+ if (!ws_after_comma)
+ log_line_notice(rule_line, "style: whitespace after comma is expected.");
+ } else if (!ws_before_comma && !ws_after_comma)
+ log_line_notice(rule_line, "style: whitespace between tokens is expected.");
+ }
+}
+
+int udev_rule_parse_value(char *str, char **ret_value, char **ret_endpos) {
+ char *i, *j;
+ bool is_escaped;
+
+ /* value must be double quotated */
+ is_escaped = str[0] == 'e';
+ str += is_escaped;
+ if (str[0] != '"')
+ return -EINVAL;
+
+ if (!is_escaped) {
+ /* unescape double quotation '\"'->'"' */
+ for (j = str, i = str + 1; *i != '"'; i++, j++) {
+ if (*i == '\0')
+ return -EINVAL;
+ if (i[0] == '\\' && i[1] == '"')
+ i++;
+ *j = *i;
+ }
+ j[0] = '\0';
+ /*
+ * The return value must be terminated by two subsequent NULs
+ * so it could be safely interpreted as nulstr.
+ */
+ j[1] = '\0';
+ } else {
+ _cleanup_free_ char *unescaped = NULL;
+ ssize_t l;
+
+ /* find the end position of value */
+ for (i = str + 1; *i != '"'; i++) {
+ if (i[0] == '\\')
+ i++;
+ if (*i == '\0')
+ return -EINVAL;
+ }
+ i[0] = '\0';
+
+ l = cunescape_length(str + 1, i - (str + 1), 0, &unescaped);
+ if (l < 0)
+ return l;
+
+ assert(l <= i - (str + 1));
+ memcpy(str, unescaped, l + 1);
+ /*
+ * The return value must be terminated by two subsequent NULs
+ * so it could be safely interpreted as nulstr.
+ */
+ str[l + 1] = '\0';
+ }
+
+ *ret_value = str;
+ *ret_endpos = i + 1;
+ return 0;
+}
+
+static int parse_line(char **line, char **ret_key, char **ret_attr, UdevRuleOperatorType *ret_op, char **ret_value) {
+ char *key_begin, *key_end, *attr, *tmp;
+ UdevRuleOperatorType op;
+ int r;
+
+ assert(line);
+ assert(*line);
+ assert(ret_key);
+ assert(ret_op);
+ assert(ret_value);
+
+ key_begin = skip_leading_chars(*line, WHITESPACE ",");
+
+ if (isempty(key_begin))
+ return 0;
+
+ for (key_end = key_begin; ; key_end++) {
+ if (key_end[0] == '\0')
+ return -EINVAL;
+ if (strchr(WHITESPACE "={", key_end[0]))
+ break;
+ if (strchr("+-!:", key_end[0]) && key_end[1] == '=')
+ break;
+ }
+ if (key_end[0] == '{') {
+ attr = key_end + 1;
+ tmp = strchr(attr, '}');
+ if (!tmp)
+ return -EINVAL;
+ *tmp++ = '\0';
+ } else {
+ attr = NULL;
+ tmp = key_end;
+ }
+
+ tmp = skip_leading_chars(tmp, NULL);
+ op = parse_operator(tmp);
+ if (op < 0)
+ return -EINVAL;
+
+ key_end[0] = '\0';
+
+ tmp += op == OP_ASSIGN ? 1 : 2;
+ tmp = skip_leading_chars(tmp, NULL);
+ r = udev_rule_parse_value(tmp, ret_value, line);
+ if (r < 0)
+ return r;
+
+ *ret_key = key_begin;
+ *ret_attr = attr;
+ *ret_op = op;
+ return 1;
+}
+
+static void check_tokens_order(UdevRuleLine *rule_line) {
+ bool has_result = false;
+
+ assert(rule_line);
+
+ LIST_FOREACH(tokens, t, rule_line->tokens)
+ if (t->type == TK_M_RESULT)
+ has_result = true;
+ else if (has_result && t->type == TK_M_PROGRAM) {
+ log_line_warning(rule_line, "Reordering RESULT check after PROGRAM assignment.");
+ break;
+ }
+}
+
+static void sort_tokens(UdevRuleLine *rule_line) {
+ assert(rule_line);
+
+ UdevRuleToken *old_tokens = TAKE_PTR(rule_line->tokens);
+
+ while (old_tokens) {
+ UdevRuleToken *min_token = NULL;
+
+ LIST_FOREACH(tokens, t, old_tokens)
+ if (!min_token || min_token->type > t->type)
+ min_token = t;
+
+ LIST_REMOVE(tokens, old_tokens, min_token);
+ LIST_APPEND(tokens, rule_line->tokens, min_token);
+ }
+}
+
+static int rule_add_line(UdevRuleFile *rule_file, const char *line_str, unsigned line_nr, bool extra_checks) {
+ _cleanup_(udev_rule_line_freep) UdevRuleLine *rule_line = NULL;
+ _cleanup_free_ char *line = NULL;
+ char *p;
+ int r;
+
+ assert(rule_file);
+ assert(line_str);
+
+ if (isempty(line_str))
+ return 0;
+
+ line = strdup(line_str);
+ if (!line)
+ return log_oom();
+
+ rule_line = new(UdevRuleLine, 1);
+ if (!rule_line)
+ return log_oom();
+
+ *rule_line = (UdevRuleLine) {
+ .line = TAKE_PTR(line),
+ .line_number = line_nr,
+ .rule_file = rule_file,
+ };
+
+ LIST_APPEND(rule_lines, rule_file->rule_lines, rule_line);
+
+ for (p = rule_line->line; !isempty(p); ) {
+ char *key, *attr, *value;
+ UdevRuleOperatorType op;
+
+ if (extra_checks)
+ check_token_delimiters(rule_line, p);
+
+ r = parse_line(&p, &key, &attr, &op, &value);
+ if (r < 0)
+ return log_line_error_errno(rule_line, r, "Invalid key/value pair, ignoring.");
+ if (r == 0)
+ break;
+
+ r = parse_token(rule_line, key, attr, op, value);
+ if (r < 0)
+ return r;
+ }
+
+ if (rule_line->type == 0) {
+ log_line_warning(rule_line, "The line has no effect, ignoring.");
+ return 0;
+ }
+
+ if (extra_checks)
+ check_tokens_order(rule_line);
+
+ sort_tokens(rule_line);
+ TAKE_PTR(rule_line);
+ return 0;
+}
+
+static void rule_resolve_goto(UdevRuleFile *rule_file) {
+ assert(rule_file);
+
+ /* link GOTOs to LABEL rules in this file to be able to fast-forward */
+ LIST_FOREACH(rule_lines, line, rule_file->rule_lines) {
+ if (!FLAGS_SET(line->type, LINE_HAS_GOTO))
+ continue;
+
+ LIST_FOREACH(rule_lines, i, line->rule_lines_next)
+ if (streq_ptr(i->label, line->goto_label)) {
+ line->goto_line = i;
+ SET_FLAG(i->type, LINE_IS_REFERENCED, true);
+ break;
+ }
+
+ if (!line->goto_line) {
+ log_line_error(line, "GOTO=\"%s\" has no matching label, ignoring.",
+ line->goto_label);
+
+ SET_FLAG(line->type, LINE_HAS_GOTO, false);
+ line->goto_label = NULL;
+
+ if ((line->type & ~(LINE_HAS_LABEL|LINE_IS_REFERENCED)) == 0) {
+ log_line_warning(line, "The line has no effect any more, dropping.");
+ /* LINE_IS_REFERENCED implies LINE_HAS_LABEL */
+ if (line->type & LINE_HAS_LABEL)
+ udev_rule_line_clear_tokens(line);
+ else
+ udev_rule_line_free(line);
+ }
+ }
+ }
+}
+
+static bool token_data_is_string(UdevRuleTokenType type) {
+ return IN_SET(type, TK_M_ENV,
+ TK_M_CONST,
+ TK_M_ATTR,
+ TK_M_SYSCTL,
+ TK_M_PARENTS_ATTR,
+ TK_A_SECLABEL,
+ TK_A_ENV,
+ TK_A_ATTR,
+ TK_A_SYSCTL);
+}
+
+static bool token_type_and_data_eq(const UdevRuleToken *a, const UdevRuleToken *b) {
+ assert(a);
+ assert(b);
+
+ return a->type == b->type &&
+ (token_data_is_string(a->type) ? streq_ptr(a->data, b->data) : (a->data == b->data));
+}
+
+static bool nulstr_eq(const char *a, const char *b) {
+ NULSTR_FOREACH(i, a)
+ if (!nulstr_contains(b, i))
+ return false;
+
+ NULSTR_FOREACH(i, b)
+ if (!nulstr_contains(a, i))
+ return false;
+
+ return true;
+}
+
+static bool token_type_and_value_eq(const UdevRuleToken *a, const UdevRuleToken *b) {
+ assert(a);
+ assert(b);
+
+ if (a->type != b->type ||
+ a->match_type != b->match_type)
+ return false;
+
+ /* token value is ignored for certain match types */
+ if (IN_SET(a->match_type, MATCH_TYPE_EMPTY, MATCH_TYPE_SUBSYSTEM))
+ return true;
+
+ return type_has_nulstr_value(a->type) ? nulstr_eq(a->value, b->value) :
+ streq_ptr(a->value, b->value);
+}
+
+static bool conflicting_op(UdevRuleOperatorType a, UdevRuleOperatorType b) {
+ return (a == OP_MATCH && b == OP_NOMATCH) ||
+ (a == OP_NOMATCH && b == OP_MATCH);
+}
+
+/* test whether all fields besides UdevRuleOperatorType of two tokens match */
+static bool tokens_eq(const UdevRuleToken *a, const UdevRuleToken *b) {
+ assert(a);
+ assert(b);
+
+ return a->attr_subst_type == b->attr_subst_type &&
+ a->attr_match_remove_trailing_whitespace == b->attr_match_remove_trailing_whitespace &&
+ token_type_and_value_eq(a, b) &&
+ token_type_and_data_eq(a, b);
+}
+
+static bool nulstr_tokens_conflict(const UdevRuleToken *a, const UdevRuleToken *b) {
+ assert(a);
+ assert(b);
+
+ if (!(a->type == b->type &&
+ type_has_nulstr_value(a->type) &&
+ a->op == b->op &&
+ a->op == OP_MATCH &&
+ a->match_type == b->match_type &&
+ a->attr_subst_type == b->attr_subst_type &&
+ a->attr_match_remove_trailing_whitespace == b->attr_match_remove_trailing_whitespace &&
+ token_type_and_data_eq(a, b)))
+ return false;
+
+ if (a->match_type == MATCH_TYPE_PLAIN) {
+ NULSTR_FOREACH(i, a->value)
+ if (nulstr_contains(b->value, i))
+ return false;
+ return true;
+ }
+
+ if (a->match_type == MATCH_TYPE_GLOB) {
+ NULSTR_FOREACH(i, a->value) {
+ size_t i_n = strcspn(i, GLOB_CHARS);
+ if (i_n == 0)
+ return false;
+ NULSTR_FOREACH(j, b->value) {
+ size_t j_n = strcspn(j, GLOB_CHARS);
+ if (j_n == 0 || strneq(i, j, MIN(i_n, j_n)))
+ return false;
+ }
+
+ }
+ return true;
+ }
+
+ return false;
+}
+
+static void udev_check_unused_labels(UdevRuleLine *line) {
+ assert(line);
+
+ if (FLAGS_SET(line->type, LINE_HAS_LABEL) &&
+ !FLAGS_SET(line->type, LINE_IS_REFERENCED))
+ log_line_notice(line, "style: LABEL=\"%s\" is unused.", line->label);
+}
+
+static void udev_check_conflicts_duplicates(UdevRuleLine *line) {
+ assert(line);
+
+ bool conflicts = false, duplicates = false;
+
+ LIST_FOREACH(tokens, token, line->tokens)
+ LIST_FOREACH(tokens, i, token->tokens_next) {
+ bool new_conflicts = false, new_duplicates = false;
+
+ if (tokens_eq(token, i)) {
+ if (!duplicates && token->op == i->op)
+ new_duplicates = true;
+ if (!conflicts && conflicting_op(token->op, i->op))
+ new_conflicts = true;
+ } else if (!conflicts && nulstr_tokens_conflict(token, i))
+ new_conflicts = true;
+ else
+ continue;
+
+ if (new_duplicates) {
+ duplicates = new_duplicates;
+ log_line_warning(line, "duplicate expressions.");
+ }
+ if (new_conflicts) {
+ conflicts = new_conflicts;
+ log_line_error(line, "conflicting match expressions, the line has no effect.");
+ }
+ if (conflicts && duplicates)
+ return;
+ }
+}
+
+static void udev_check_rule_line(UdevRuleLine *line) {
+ udev_check_unused_labels(line);
+ udev_check_conflicts_duplicates(line);
+}
+
+int udev_rules_parse_file(UdevRules *rules, const char *filename, bool extra_checks, UdevRuleFile **ret) {
+ _cleanup_(udev_rule_file_freep) UdevRuleFile *rule_file = NULL;
+ _cleanup_free_ char *continuation = NULL, *name = NULL;
+ _cleanup_fclose_ FILE *f = NULL;
+ bool ignore_line = false;
+ unsigned line_nr = 0;
+ struct stat st;
+ int r;
+
+ assert(rules);
+ assert(filename);
+
+ f = fopen(filename, "re");
+ if (!f) {
+ if (extra_checks)
+ return -errno;
+
+ if (errno == ENOENT)
+ return 0;
+
+ return log_warning_errno(errno, "Failed to open %s, ignoring: %m", filename);
+ }
+
+ if (fstat(fileno(f), &st) < 0)
+ return log_warning_errno(errno, "Failed to stat %s, ignoring: %m", filename);
+
+ if (null_or_empty(&st)) {
+ log_debug("Skipping empty file: %s", filename);
+ if (ret)
+ *ret = NULL;
+ return 0;
+ }
+
+ r = hashmap_put_stats_by_path(&rules->stats_by_path, filename, &st);
+ if (r < 0)
+ return log_warning_errno(errno, "Failed to save stat for %s, ignoring: %m", filename);
+
+ (void) fd_warn_permissions(filename, fileno(f));
+
+ log_debug("Reading rules file: %s", filename);
+
+ name = strdup(filename);
+ if (!name)
+ return log_oom();
+
+ rule_file = new(UdevRuleFile, 1);
+ if (!rule_file)
+ return log_oom();
+
+ *rule_file = (UdevRuleFile) {
+ .filename = TAKE_PTR(name),
+ .rules = rules,
+ };
+
+ LIST_APPEND(rule_files, rules->rule_files, rule_file);
+
+ for (;;) {
+ _cleanup_free_ char *buf = NULL;
+ size_t len;
+ char *line;
+
+ r = read_line(f, UDEV_LINE_SIZE, &buf);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ line_nr++;
+ line = skip_leading_chars(buf, NULL);
+
+ /* Lines beginning with '#' are ignored regardless of line continuation. */
+ if (line[0] == '#')
+ continue;
+
+ len = strlen(line);
+
+ if (continuation && !ignore_line) {
+ if (strlen(continuation) + len >= UDEV_LINE_SIZE)
+ ignore_line = true;
+
+ if (!strextend(&continuation, line))
+ return log_oom();
+
+ if (!ignore_line) {
+ line = continuation;
+ len = strlen(line);
+ }
+ }
+
+ if (len > 0 && line[len - 1] == '\\') {
+ if (ignore_line)
+ continue;
+
+ line[len - 1] = '\0';
+ if (!continuation) {
+ continuation = strdup(line);
+ if (!continuation)
+ return log_oom();
+ }
+
+ continue;
+ }
+
+ if (ignore_line)
+ log_file_error(rule_file, line_nr, "Line is too long, ignored.");
+ else if (len > 0)
+ (void) rule_add_line(rule_file, line, line_nr, extra_checks);
+
+ continuation = mfree(continuation);
+ ignore_line = false;
+ }
+
+ if (continuation)
+ log_file_error(rule_file, line_nr,
+ "Unexpected EOF after line continuation, line ignored.");
+
+ rule_resolve_goto(rule_file);
+
+ if (extra_checks)
+ LIST_FOREACH(rule_lines, line, rule_file->rule_lines)
+ udev_check_rule_line(line);
+
+ if (ret)
+ *ret = rule_file;
+
+ TAKE_PTR(rule_file);
+ return 1;
+}
+
+unsigned udev_rule_file_get_issues(UdevRuleFile *rule_file) {
+ assert(rule_file);
+
+ return rule_file->issues;
+}
+
+UdevRules* udev_rules_new(ResolveNameTiming resolve_name_timing) {
+ assert(resolve_name_timing >= 0 && resolve_name_timing < _RESOLVE_NAME_TIMING_MAX);
+
+ UdevRules *rules = new(UdevRules, 1);
+ if (!rules)
+ return NULL;
+
+ *rules = (UdevRules) {
+ .resolve_name_timing = resolve_name_timing,
+ };
+
+ return rules;
+}
+
+int udev_rules_load(UdevRules **ret_rules, ResolveNameTiming resolve_name_timing) {
+ _cleanup_(udev_rules_freep) UdevRules *rules = NULL;
+ _cleanup_strv_free_ char **files = NULL;
+ int r;
+
+ rules = udev_rules_new(resolve_name_timing);
+ if (!rules)
+ return -ENOMEM;
+
+ r = conf_files_list_strv(&files, ".rules", NULL, 0, RULES_DIRS);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to enumerate rules files: %m");
+
+ STRV_FOREACH(f, files) {
+ r = udev_rules_parse_file(rules, *f, /* extra_checks = */ false, NULL);
+ if (r < 0)
+ log_debug_errno(r, "Failed to read rules file %s, ignoring: %m", *f);
+ }
+
+ *ret_rules = TAKE_PTR(rules);
+ return 0;
+}
+
+bool udev_rules_should_reload(UdevRules *rules) {
+ _cleanup_hashmap_free_ Hashmap *stats_by_path = NULL;
+ int r;
+
+ if (!rules)
+ return true;
+
+ r = config_get_stats_by_path(".rules", NULL, 0, RULES_DIRS, /* check_dropins = */ false, &stats_by_path);
+ if (r < 0) {
+ log_warning_errno(r, "Failed to get stats of udev rules, ignoring: %m");
+ return true;
+ }
+
+ if (!stats_by_path_equal(rules->stats_by_path, stats_by_path)) {
+ log_debug("Udev rules need reloading");
+ return true;
+ }
+
+ return false;
+}
+
+static bool token_match_string(UdevRuleToken *token, const char *str) {
+ const char *value;
+ bool match = false;
+
+ assert(token);
+ assert(token->value);
+ assert(token->type < _TK_M_MAX);
+
+ str = strempty(str);
+ value = token->value;
+
+ switch (token->match_type) {
+ case MATCH_TYPE_EMPTY:
+ match = isempty(str);
+ break;
+ case MATCH_TYPE_SUBSYSTEM:
+ match = STR_IN_SET(str, "subsystem", "class", "bus");
+ break;
+ case MATCH_TYPE_PLAIN_WITH_EMPTY:
+ if (isempty(str)) {
+ match = true;
+ break;
+ }
+ _fallthrough_;
+ case MATCH_TYPE_PLAIN:
+ NULSTR_FOREACH(i, value)
+ if (streq(i, str)) {
+ match = true;
+ break;
+ }
+ break;
+ case MATCH_TYPE_GLOB_WITH_EMPTY:
+ if (isempty(str)) {
+ match = true;
+ break;
+ }
+ _fallthrough_;
+ case MATCH_TYPE_GLOB:
+ NULSTR_FOREACH(i, value)
+ if ((fnmatch(i, str, 0) == 0)) {
+ match = true;
+ break;
+ }
+ break;
+ default:
+ assert_not_reached();
+ }
+
+ return token->op == (match ? OP_MATCH : OP_NOMATCH);
+}
+
+static bool token_match_attr(UdevRuleToken *token, sd_device *dev, UdevEvent *event) {
+ char nbuf[UDEV_NAME_SIZE], vbuf[UDEV_NAME_SIZE];
+ const char *name, *value;
+ bool truncated;
+
+ assert(token);
+ assert(IN_SET(token->type, TK_M_ATTR, TK_M_PARENTS_ATTR));
+ assert(dev);
+ assert(event);
+
+ name = token->data;
+
+ switch (token->attr_subst_type) {
+ case SUBST_TYPE_FORMAT:
+ (void) udev_event_apply_format(event, name, nbuf, sizeof(nbuf), false, NULL, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "sysfs attribute name", name,
+ token->type == TK_M_ATTR ? "ATTR" : "ATTRS", /* is_match = */ true);
+ return false;
+ }
+
+ name = nbuf;
+ _fallthrough_;
+ case SUBST_TYPE_PLAIN:
+ if (sd_device_get_sysattr_value(dev, name, &value) < 0)
+ return false;
+ break;
+ case SUBST_TYPE_SUBSYS:
+ if (udev_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), true) < 0)
+ return false;
+ value = vbuf;
+ break;
+ default:
+ assert_not_reached();
+ }
+
+ /* remove trailing whitespace, if not asked to match for it */
+ if (token->attr_match_remove_trailing_whitespace) {
+ if (value != vbuf) {
+ strscpy(vbuf, sizeof(vbuf), value);
+ value = vbuf;
+ }
+
+ delete_trailing_chars(vbuf, NULL);
+ }
+
+ return token_match_string(token, value);
+}
+
+static int get_property_from_string(char *line, char **ret_key, char **ret_value) {
+ char *key, *val;
+ size_t len;
+
+ assert(line);
+ assert(ret_key);
+ assert(ret_value);
+
+ /* find key */
+ key = skip_leading_chars(line, NULL);
+
+ /* comment or empty line */
+ if (IN_SET(key[0], '#', '\0')) {
+ *ret_key = *ret_value = NULL;
+ return 0;
+ }
+
+ /* split key/value */
+ val = strchr(key, '=');
+ if (!val)
+ return -EINVAL;
+ *val++ = '\0';
+
+ key = strstrip(key);
+ if (isempty(key))
+ return -EINVAL;
+
+ val = strstrip(val);
+ if (isempty(val))
+ return -EINVAL;
+
+ /* unquote */
+ if (IN_SET(val[0], '"', '\'')) {
+ len = strlen(val);
+ if (len == 1 || val[len-1] != val[0])
+ return -EINVAL;
+ val[len-1] = '\0';
+ val++;
+ }
+
+ *ret_key = key;
+ *ret_value = val;
+ return 1;
+}
+
+static int import_parent_into_properties(sd_device *dev, const char *filter) {
+ sd_device *parent;
+ int r;
+
+ assert(dev);
+ assert(filter);
+
+ r = sd_device_get_parent(dev, &parent);
+ if (r == -ENOENT)
+ return 0;
+ if (r < 0)
+ return r;
+
+ FOREACH_DEVICE_PROPERTY(parent, key, val) {
+ if (fnmatch(filter, key, 0) != 0)
+ continue;
+ r = device_add_property(dev, key, val);
+ if (r < 0)
+ return r;
+ }
+
+ return 1;
+}
+
+static int attr_subst_subdir(char attr[static UDEV_PATH_SIZE]) {
+ _cleanup_closedir_ DIR *dir = NULL;
+ char buf[UDEV_PATH_SIZE], *p;
+ const char *tail;
+ size_t len, size;
+ bool truncated;
+
+ assert(attr);
+
+ tail = strstr(attr, "/*/");
+ if (!tail)
+ return 0;
+
+ len = tail - attr + 1; /* include slash at the end */
+ tail += 2; /* include slash at the beginning */
+
+ p = buf;
+ size = sizeof(buf);
+ size -= strnpcpy_full(&p, size, attr, len, &truncated);
+ if (truncated)
+ return -ENOENT;
+
+ dir = opendir(buf);
+ if (!dir)
+ return -errno;
+
+ FOREACH_DIRENT_ALL(de, dir, break) {
+ if (de->d_name[0] == '.')
+ continue;
+
+ strscpyl_full(p, size, &truncated, de->d_name, tail, NULL);
+ if (truncated)
+ continue;
+
+ if (faccessat(dirfd(dir), p, F_OK, 0) < 0)
+ continue;
+
+ strcpy(attr, buf);
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+static size_t udev_replace_ifname(char *str) {
+ size_t replaced = 0;
+
+ assert(str);
+
+ /* See ifname_valid_full(). */
+
+ for (char *p = str; *p != '\0'; p++)
+ if (!ifname_valid_char(*p)) {
+ *p = '_';
+ replaced++;
+ }
+
+ return replaced;
+}
+
+static int udev_rule_apply_token_to_event(
+ UdevRuleToken *token,
+ sd_device *dev,
+ UdevEvent *event,
+ usec_t timeout_usec,
+ int timeout_signal,
+ Hashmap *properties_list) {
+
+ int r;
+
+ assert(token);
+ assert(dev);
+ assert(event);
+
+ /* This returns the following values:
+ * 0 on the current token does not match the event,
+ * 1 on the current token matches the event, and
+ * negative errno on some critical errors. */
+
+ switch (token->type) {
+ case TK_M_ACTION: {
+ sd_device_action_t a;
+
+ r = sd_device_get_action(dev, &a);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get uevent action type: %m");
+
+ return token_match_string(token, device_action_to_string(a));
+ }
+ case TK_M_DEVPATH: {
+ const char *val;
+
+ r = sd_device_get_devpath(dev, &val);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get devpath: %m");
+
+ return token_match_string(token, val);
+ }
+ case TK_M_KERNEL:
+ case TK_M_PARENTS_KERNEL: {
+ const char *val;
+
+ r = sd_device_get_sysname(dev, &val);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get sysname: %m");
+
+ return token_match_string(token, val);
+ }
+ case TK_M_DEVLINK:
+ FOREACH_DEVICE_DEVLINK(dev, val)
+ if (token_match_string(token, strempty(startswith(val, "/dev/"))) == (token->op == OP_MATCH))
+ return token->op == OP_MATCH;
+ return token->op == OP_NOMATCH;
+ case TK_M_NAME:
+ return token_match_string(token, event->name);
+ case TK_M_ENV: {
+ const char *val = NULL;
+
+ (void) device_get_property_value_with_fallback(dev, token->data, properties_list, &val);
+
+ return token_match_string(token, val);
+ }
+ case TK_M_CONST: {
+ const char *val, *k = token->data;
+
+ if (streq(k, "arch"))
+ val = architecture_to_string(uname_architecture());
+ else if (streq(k, "virt"))
+ val = virtualization_to_string(detect_virtualization());
+ else if (streq(k, "cvm"))
+ val = confidential_virtualization_to_string(detect_confidential_virtualization());
+ else
+ assert_not_reached();
+ return token_match_string(token, val);
+ }
+ case TK_M_TAG:
+ case TK_M_PARENTS_TAG:
+ FOREACH_DEVICE_CURRENT_TAG(dev, val)
+ if (token_match_string(token, val) == (token->op == OP_MATCH))
+ return token->op == OP_MATCH;
+ return token->op == OP_NOMATCH;
+ case TK_M_SUBSYSTEM:
+ case TK_M_PARENTS_SUBSYSTEM: {
+ const char *val;
+
+ r = sd_device_get_subsystem(dev, &val);
+ if (r == -ENOENT)
+ val = NULL;
+ else if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get subsystem: %m");
+
+ return token_match_string(token, val);
+ }
+ case TK_M_DRIVER:
+ case TK_M_PARENTS_DRIVER: {
+ const char *val;
+
+ r = sd_device_get_driver(dev, &val);
+ if (r == -ENOENT)
+ val = NULL;
+ else if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get driver: %m");
+
+ return token_match_string(token, val);
+ }
+ case TK_M_ATTR:
+ case TK_M_PARENTS_ATTR:
+ return token_match_attr(token, dev, event);
+ case TK_M_SYSCTL: {
+ _cleanup_free_ char *value = NULL;
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->data, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "sysctl entry name", token->data, "SYSCTL", /* is_match = */ true);
+ return false;
+ }
+
+ r = sysctl_read(sysctl_normalize(buf), &value);
+ if (r < 0 && r != -ENOENT)
+ return log_event_error_errno(dev, token, r, "Failed to read sysctl '%s': %m", buf);
+
+ return token_match_string(token, strstrip(value));
+ }
+ case TK_M_TEST: {
+ mode_t mode = PTR_TO_MODE(token->data);
+ char buf[UDEV_PATH_SIZE];
+ struct stat statbuf;
+ bool match, truncated;
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "file name", token->value, "TEST", /* is_match = */ true);
+ return false;
+ }
+
+ if (!path_is_absolute(buf) &&
+ udev_resolve_subsys_kernel(buf, buf, sizeof(buf), false) < 0) {
+ char tmp[UDEV_PATH_SIZE];
+ const char *val;
+
+ r = sd_device_get_syspath(dev, &val);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to get syspath: %m");
+
+ strscpy_full(tmp, sizeof(tmp), buf, &truncated);
+ assert(!truncated);
+ strscpyl_full(buf, sizeof(buf), &truncated, val, "/", tmp, NULL);
+ if (truncated)
+ return false;
+ }
+
+ r = attr_subst_subdir(buf);
+ if (r == -ENOENT)
+ return token->op == OP_NOMATCH;
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to test for the existence of '%s': %m", buf);
+
+ if (stat(buf, &statbuf) < 0)
+ return token->op == OP_NOMATCH;
+
+ if (mode == MODE_INVALID)
+ return token->op == OP_MATCH;
+
+ match = (statbuf.st_mode & mode) > 0;
+ return token->op == (match ? OP_MATCH : OP_NOMATCH);
+ }
+ case TK_M_PROGRAM: {
+ char buf[UDEV_LINE_SIZE], result[UDEV_LINE_SIZE];
+ bool truncated;
+ size_t count;
+
+ event->program_result = mfree(event->program_result);
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "command", token->value, "PROGRAM", /* is_match = */ true);
+ return false;
+ }
+
+ log_event_debug(dev, token, "Running PROGRAM '%s'", buf);
+
+ r = udev_event_spawn(event, timeout_usec, timeout_signal, true, buf, result, sizeof(result), NULL);
+ if (r != 0) {
+ if (r < 0)
+ log_event_warning_errno(dev, token, r, "Failed to execute \"%s\": %m", buf);
+ else /* returned value is positive when program fails */
+ log_event_debug(dev, token, "Command \"%s\" returned %d (error)", buf, r);
+ return token->op == OP_NOMATCH;
+ }
+
+ delete_trailing_chars(result, "\n");
+ count = udev_replace_chars(result, UDEV_ALLOWED_CHARS_INPUT);
+ if (count > 0)
+ log_event_debug(dev, token,
+ "Replaced %zu character(s) in result of \"%s\"",
+ count, buf);
+
+ event->program_result = strdup(result);
+ return token->op == OP_MATCH;
+ }
+ case TK_M_IMPORT_FILE: {
+ _cleanup_fclose_ FILE *f = NULL;
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "file name to be imported", token->value, "IMPORT", /* is_match = */ true);
+ return false;
+ }
+
+ log_event_debug(dev, token, "Importing properties from '%s'", buf);
+
+ f = fopen(buf, "re");
+ if (!f) {
+ if (errno != ENOENT)
+ return log_event_error_errno(dev, token, errno, "Failed to open '%s': %m", buf);
+ return token->op == OP_NOMATCH;
+ }
+
+ for (;;) {
+ _cleanup_free_ char *line = NULL;
+ char *key, *value;
+
+ r = read_line(f, LONG_LINE_MAX, &line);
+ if (r < 0) {
+ log_event_debug_errno(dev, token, r, "Failed to read '%s', ignoring: %m", buf);
+ return token->op == OP_NOMATCH;
+ }
+ if (r == 0)
+ break;
+
+ r = get_property_from_string(line, &key, &value);
+ if (r < 0) {
+ log_event_debug_errno(dev, token, r,
+ "Failed to parse key and value from '%s', ignoring: %m",
+ line);
+ continue;
+ }
+ if (r == 0)
+ continue;
+
+ r = device_add_property(dev, key, value);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r,
+ "Failed to add property %s=%s: %m",
+ key, value);
+ }
+
+ return token->op == OP_MATCH;
+ }
+ case TK_M_IMPORT_PROGRAM: {
+ _cleanup_strv_free_ char **lines = NULL;
+ char buf[UDEV_LINE_SIZE], result[UDEV_LINE_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "command", token->value, "IMPORT", /* is_match = */ true);
+ return false;
+ }
+
+ log_event_debug(dev, token, "Importing properties from results of '%s'", buf);
+
+ r = udev_event_spawn(event, timeout_usec, timeout_signal, true, buf, result, sizeof result, &truncated);
+ if (r != 0) {
+ if (r < 0)
+ log_event_warning_errno(dev, token, r, "Failed to execute '%s', ignoring: %m", buf);
+ else /* returned value is positive when program fails */
+ log_event_debug(dev, token, "Command \"%s\" returned %d (error), ignoring", buf, r);
+ return token->op == OP_NOMATCH;
+ }
+
+ if (truncated) {
+ bool found = false;
+
+ /* Drop the last line. */
+ for (char *p = PTR_SUB1(buf + strlen(buf), buf); p; p = PTR_SUB1(p, buf))
+ if (strchr(NEWLINE, *p)) {
+ *p = '\0';
+ found = true;
+ } else if (found)
+ break;
+ }
+
+ r = strv_split_newlines_full(&lines, result, EXTRACT_RETAIN_ESCAPE);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_event_warning_errno(dev, token, r,
+ "Failed to extract lines from result of command \"%s\", ignoring: %m", buf);
+ return false;
+ }
+
+ STRV_FOREACH(line, lines) {
+ char *key, *value;
+
+ r = get_property_from_string(*line, &key, &value);
+ if (r < 0) {
+ log_event_debug_errno(dev, token, r,
+ "Failed to parse key and value from '%s', ignoring: %m",
+ *line);
+ continue;
+ }
+ if (r == 0)
+ continue;
+
+ r = device_add_property(dev, key, value);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r,
+ "Failed to add property %s=%s: %m",
+ key, value);
+ }
+
+ return token->op == OP_MATCH;
+ }
+ case TK_M_IMPORT_BUILTIN: {
+ UdevBuiltinCommand cmd = PTR_TO_UDEV_BUILTIN_CMD(token->data);
+ assert(cmd >= 0 && cmd < _UDEV_BUILTIN_MAX);
+ unsigned mask = 1U << (int) cmd;
+ char buf[UDEV_LINE_SIZE];
+ bool truncated;
+
+ if (udev_builtin_run_once(cmd)) {
+ /* check if we ran already */
+ if (event->builtin_run & mask) {
+ log_event_debug(dev, token, "Skipping builtin '%s' in IMPORT key",
+ udev_builtin_name(cmd));
+ /* return the result from earlier run */
+ return token->op == (event->builtin_ret & mask ? OP_NOMATCH : OP_MATCH);
+ }
+ /* mark as ran */
+ event->builtin_run |= mask;
+ }
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "builtin command", token->value, "IMPORT", /* is_match = */ true);
+ return false;
+ }
+
+ log_event_debug(dev, token, "Importing properties from results of builtin command '%s'", buf);
+
+ r = udev_builtin_run(event, cmd, buf, false);
+ if (r < 0) {
+ /* remember failure */
+ log_event_debug_errno(dev, token, r, "Failed to run builtin '%s': %m", buf);
+ event->builtin_ret |= mask;
+ }
+ return token->op == (r >= 0 ? OP_MATCH : OP_NOMATCH);
+ }
+ case TK_M_IMPORT_DB: {
+ const char *val;
+
+ if (!event->dev_db_clone)
+ return token->op == OP_NOMATCH;
+ r = sd_device_get_property_value(event->dev_db_clone, token->value, &val);
+ if (r == -ENOENT)
+ return token->op == OP_NOMATCH;
+ if (r < 0)
+ return log_event_error_errno(dev, token, r,
+ "Failed to get property '%s' from database: %m",
+ token->value);
+
+ r = device_add_property(dev, token->value, val);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to add property '%s=%s': %m",
+ token->value, val);
+ return token->op == OP_MATCH;
+ }
+ case TK_M_IMPORT_CMDLINE: {
+ _cleanup_free_ char *value = NULL;
+
+ r = proc_cmdline_get_key(token->value, PROC_CMDLINE_VALUE_OPTIONAL|PROC_CMDLINE_IGNORE_EFI_OPTIONS, &value);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r,
+ "Failed to read '%s' option from /proc/cmdline: %m",
+ token->value);
+ if (r == 0)
+ return token->op == OP_NOMATCH;
+
+ r = device_add_property(dev, token->value, value ?: "1");
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to add property '%s=%s': %m",
+ token->value, value ?: "1");
+ return token->op == OP_MATCH;
+ }
+ case TK_M_IMPORT_PARENT: {
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "property name", token->value, "IMPORT", /* is_match = */ true);
+ return false;
+ }
+
+ r = import_parent_into_properties(dev, buf);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r,
+ "Failed to import properties '%s' from parent: %m",
+ buf);
+ return token->op == (r > 0 ? OP_MATCH : OP_NOMATCH);
+ }
+ case TK_M_RESULT:
+ return token_match_string(token, event->program_result);
+ case TK_A_OPTIONS_STRING_ESCAPE_NONE:
+ event->esc = ESCAPE_NONE;
+ break;
+ case TK_A_OPTIONS_STRING_ESCAPE_REPLACE:
+ event->esc = ESCAPE_REPLACE;
+ break;
+ case TK_A_OPTIONS_DB_PERSIST:
+ device_set_db_persist(dev);
+ break;
+ case TK_A_OPTIONS_INOTIFY_WATCH:
+ if (event->inotify_watch_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->inotify_watch_final = true;
+
+ event->inotify_watch = token->data;
+ break;
+ case TK_A_OPTIONS_DEVLINK_PRIORITY:
+ device_set_devlink_priority(dev, PTR_TO_INT(token->data));
+ break;
+ case TK_A_OPTIONS_LOG_LEVEL: {
+ int level = PTR_TO_INT(token->data);
+
+ if (level < 0)
+ level = event->default_log_level;
+
+ log_set_max_level(level);
+
+ if (level == LOG_DEBUG && !event->log_level_was_debug) {
+ /* The log level becomes LOG_DEBUG at first time. Let's log basic information. */
+ log_device_uevent(dev, "The log level is changed to 'debug' while processing device");
+ event->log_level_was_debug = true;
+ }
+
+ break;
+ }
+ case TK_A_OWNER: {
+ char owner[UDEV_NAME_SIZE];
+ const char *ow = owner;
+ bool truncated;
+
+ if (event->owner_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->owner_final = true;
+
+ (void) udev_event_apply_format(event, token->value, owner, sizeof(owner), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "user name", token->value, "OWNER", /* is_match = */ false);
+ break;
+ }
+
+ r = get_user_creds(&ow, &event->uid, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
+ if (r < 0)
+ log_unknown_owner(dev, token->rule_line, r, "user", owner);
+ else
+ log_event_debug(dev, token, "OWNER %s(%u)", owner, event->uid);
+ break;
+ }
+ case TK_A_GROUP: {
+ char group[UDEV_NAME_SIZE];
+ const char *gr = group;
+ bool truncated;
+
+ if (event->group_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->group_final = true;
+
+ (void) udev_event_apply_format(event, token->value, group, sizeof(group), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "group name", token->value, "GROUP", /* is_match = */ false);
+ break;
+ }
+
+ r = get_group_creds(&gr, &event->gid, USER_CREDS_ALLOW_MISSING);
+ if (r < 0)
+ log_unknown_owner(dev, token->rule_line, r, "group", group);
+ else
+ log_event_debug(dev, token, "GROUP %s(%u)", group, event->gid);
+ break;
+ }
+ case TK_A_MODE: {
+ char mode_str[UDEV_NAME_SIZE];
+ bool truncated;
+
+ if (event->mode_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->mode_final = true;
+
+ (void) udev_event_apply_format(event, token->value, mode_str, sizeof(mode_str), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "mode", token->value, "MODE", /* is_match = */ false);
+ break;
+ }
+
+ r = parse_mode(mode_str, &event->mode);
+ if (r < 0)
+ log_event_error_errno(dev, token, r, "Failed to parse mode '%s', ignoring: %m", mode_str);
+ else
+ log_event_debug(dev, token, "MODE %#o", event->mode);
+ break;
+ }
+ case TK_A_OWNER_ID:
+ if (event->owner_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->owner_final = true;
+ if (!token->data)
+ break;
+ event->uid = PTR_TO_UID(token->data);
+ log_event_debug(dev, token, "OWNER %u", event->uid);
+ break;
+ case TK_A_GROUP_ID:
+ if (event->group_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->group_final = true;
+ if (!token->data)
+ break;
+ event->gid = PTR_TO_GID(token->data);
+ log_event_debug(dev, token, "GROUP %u", event->gid);
+ break;
+ case TK_A_MODE_ID:
+ if (event->mode_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->mode_final = true;
+ if (!token->data)
+ break;
+ event->mode = PTR_TO_MODE(token->data);
+ log_event_debug(dev, token, "MODE %#o", event->mode);
+ break;
+ case TK_A_SECLABEL: {
+ _cleanup_free_ char *name = NULL, *label = NULL;
+ char label_str[UDEV_LINE_SIZE] = {};
+ bool truncated;
+
+ name = strdup(token->data);
+ if (!name)
+ return log_oom();
+
+ (void) udev_event_apply_format(event, token->value, label_str, sizeof(label_str), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "security label", token->value, "SECLABEL", /* is_match = */ false);
+ break;
+ }
+
+ if (!isempty(label_str))
+ label = strdup(label_str);
+ else
+ label = strdup(token->value);
+ if (!label)
+ return log_oom();
+
+ if (token->op == OP_ASSIGN)
+ ordered_hashmap_clear_free_free(event->seclabel_list);
+
+ r = ordered_hashmap_ensure_put(&event->seclabel_list, NULL, name, label);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to store SECLABEL{%s}='%s': %m", name, label);
+
+ log_event_debug(dev, token, "SECLABEL{%s}='%s'", name, label);
+
+ TAKE_PTR(name);
+ TAKE_PTR(label);
+ break;
+ }
+ case TK_A_ENV: {
+ const char *val, *name = token->data;
+ char value_new[UDEV_NAME_SIZE], *p = value_new;
+ size_t count, l = sizeof(value_new);
+ bool truncated;
+
+ if (isempty(token->value)) {
+ if (token->op == OP_ADD)
+ break;
+ r = device_add_property(dev, name, NULL);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to remove property '%s': %m", name);
+ break;
+ }
+
+ if (token->op == OP_ADD &&
+ device_get_property_value_with_fallback(dev, name, properties_list, &val) >= 0) {
+ l = strpcpyl_full(&p, l, &truncated, val, " ", NULL);
+ if (truncated) {
+ log_event_warning(dev, token,
+ "The buffer for the property '%s' is full, "
+ "refusing to append the new value '%s'.", name, token->value);
+ break;
+ }
+ }
+
+ (void) udev_event_apply_format(event, token->value, p, l, false, properties_list, &truncated);
+ if (truncated) {
+ _cleanup_free_ char *key_with_name = strjoin("ENV{", name, "}");
+ log_event_truncated(dev, token, "property value", token->value,
+ key_with_name ?: "ENV", /* is_match = */ false);
+ break;
+ }
+
+ if (event->esc == ESCAPE_REPLACE) {
+ count = udev_replace_chars(p, NULL);
+ if (count > 0)
+ log_event_debug(dev, token,
+ "Replaced %zu slash(es) from result of ENV{%s}%s=\"%s\"",
+ count, name, token->op == OP_ADD ? "+" : "", token->value);
+ }
+
+ r = device_add_property(dev, name, value_new);
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to add property '%s=%s': %m", name, value_new);
+ break;
+ }
+ case TK_A_TAG: {
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "tag name", token->value, "TAG", /* is_match = */ false);
+ break;
+ }
+
+ if (token->op == OP_ASSIGN)
+ device_cleanup_tags(dev);
+
+ if (token->op == OP_REMOVE)
+ device_remove_tag(dev, buf);
+ else {
+ r = device_add_tag(dev, buf, true);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ log_event_warning_errno(dev, token, r, "Failed to add tag '%s', ignoring: %m", buf);
+ }
+ break;
+ }
+ case TK_A_NAME: {
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+ size_t count;
+
+ if (event->name_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->name_final = true;
+
+ if (sd_device_get_ifindex(dev, NULL) < 0) {
+ log_event_error(dev, token,
+ "Only network interfaces can be renamed, ignoring NAME=\"%s\".",
+ token->value);
+ break;
+ }
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "network interface name", token->value, "NAME", /* is_match = */ false);
+ break;
+ }
+
+ if (IN_SET(event->esc, ESCAPE_UNSET, ESCAPE_REPLACE)) {
+ if (naming_scheme_has(NAMING_REPLACE_STRICTLY))
+ count = udev_replace_ifname(buf);
+ else
+ count = udev_replace_chars(buf, "/");
+ if (count > 0)
+ log_event_debug(dev, token,
+ "Replaced %zu character(s) from result of NAME=\"%s\"",
+ count, token->value);
+ }
+ r = free_and_strdup_warn(&event->name, buf);
+ if (r < 0)
+ return r;
+
+ log_event_debug(dev, token, "NAME '%s'", event->name);
+ break;
+ }
+ case TK_A_DEVLINK: {
+ char buf[UDEV_PATH_SIZE];
+ bool truncated;
+ size_t count;
+
+ if (event->devlink_final)
+ break;
+ if (sd_device_get_devnum(dev, NULL) < 0)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->devlink_final = true;
+ if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL))
+ device_cleanup_devlinks(dev);
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf),
+ /* replace_whitespace = */ event->esc != ESCAPE_NONE, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "symbolic link path", token->value, "SYMLINK", /* is_match = */ false);
+ break;
+ }
+
+ /* By default or string_escape=none, allow multiple symlinks separated by spaces. */
+ if (event->esc == ESCAPE_UNSET)
+ count = udev_replace_chars(buf, /* allow = */ "/ ");
+ else if (event->esc == ESCAPE_REPLACE)
+ count = udev_replace_chars(buf, /* allow = */ "/");
+ else
+ count = 0;
+ if (count > 0)
+ log_event_debug(dev, token,
+ "Replaced %zu character(s) from result of SYMLINK=\"%s\"",
+ count, token->value);
+
+ for (const char *p = buf;;) {
+ _cleanup_free_ char *path = NULL;
+
+ r = extract_first_word(&p, &path, NULL, EXTRACT_RETAIN_ESCAPE);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0) {
+ log_warning_errno(r, "Failed to extract first path in SYMLINK=, ignoring: %m");
+ break;
+ }
+ if (r == 0)
+ break;
+
+ if (token->op == OP_REMOVE) {
+ r = device_remove_devlink(dev, path);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ log_event_warning_errno(dev, token, r, "Failed to remove devlink '%s', ignoring: %m", path);
+ else if (r > 0)
+ log_event_debug(dev, token, "Dropped SYMLINK '%s'", path);
+ } else {
+ r = device_add_devlink(dev, path);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ log_event_warning_errno(dev, token, r, "Failed to add devlink '%s', ignoring: %m", path);
+ else if (r > 0)
+ log_event_debug(dev, token, "Added SYMLINK '%s'", path);
+ }
+ }
+ break;
+ }
+ case TK_A_ATTR: {
+ char buf[UDEV_PATH_SIZE], value[UDEV_NAME_SIZE];
+ const char *val, *key_name = token->data;
+ bool truncated;
+
+ if (udev_resolve_subsys_kernel(key_name, buf, sizeof(buf), false) < 0 &&
+ sd_device_get_syspath(dev, &val) >= 0) {
+ strscpyl_full(buf, sizeof(buf), &truncated, val, "/", key_name, NULL);
+ if (truncated) {
+ log_event_warning(dev, token,
+ "The path to the attribute '%s/%s' is too long, refusing to set the attribute.",
+ val, key_name);
+ break;
+ }
+ }
+
+ r = attr_subst_subdir(buf);
+ if (r < 0) {
+ log_event_error_errno(dev, token, r, "Could not find file matches '%s', ignoring: %m", buf);
+ break;
+ }
+ (void) udev_event_apply_format(event, token->value, value, sizeof(value), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "attribute value", token->value, "ATTR", /* is_match = */ false);
+ break;
+ }
+
+ log_event_debug(dev, token, "ATTR '%s' writing '%s'", buf, value);
+ r = write_string_file(buf, value,
+ WRITE_STRING_FILE_VERIFY_ON_FAILURE |
+ WRITE_STRING_FILE_DISABLE_BUFFER |
+ WRITE_STRING_FILE_AVOID_NEWLINE |
+ WRITE_STRING_FILE_VERIFY_IGNORE_NEWLINE);
+ if (r < 0)
+ log_event_error_errno(dev, token, r, "Failed to write ATTR{%s}, ignoring: %m", buf);
+ break;
+ }
+ case TK_A_SYSCTL: {
+ char buf[UDEV_PATH_SIZE], value[UDEV_NAME_SIZE];
+ bool truncated;
+
+ (void) udev_event_apply_format(event, token->data, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "sysctl entry name", token->data, "SYSCTL", /* is_match = */ false);
+ break;
+ }
+
+ (void) udev_event_apply_format(event, token->value, value, sizeof(value), false, properties_list, &truncated);
+ if (truncated) {
+ _cleanup_free_ char *key_with_name = strjoin("SYSCTL{", buf, "}");
+ log_event_truncated(dev, token, "sysctl value", token->value,
+ key_with_name ?: "SYSCTL", /* is_match = */ false);
+ break;
+ }
+
+ sysctl_normalize(buf);
+ log_event_debug(dev, token, "SYSCTL '%s' writing '%s'", buf, value);
+ r = sysctl_write(buf, value);
+ if (r < 0)
+ log_event_error_errno(dev, token, r, "Failed to write SYSCTL{%s}='%s', ignoring: %m", buf, value);
+ break;
+ }
+ case TK_A_RUN_BUILTIN:
+ case TK_A_RUN_PROGRAM: {
+ _cleanup_free_ char *cmd = NULL;
+ char buf[UDEV_LINE_SIZE];
+ bool truncated;
+
+ if (event->run_final)
+ break;
+ if (token->op == OP_ASSIGN_FINAL)
+ event->run_final = true;
+
+ if (IN_SET(token->op, OP_ASSIGN, OP_ASSIGN_FINAL))
+ ordered_hashmap_clear_free_key(event->run_list);
+
+ (void) udev_event_apply_format(event, token->value, buf, sizeof(buf), false, properties_list, &truncated);
+ if (truncated) {
+ log_event_truncated(dev, token, "command", token->value,
+ token->type == TK_A_RUN_BUILTIN ? "RUN{builtin}" : "RUN{program}",
+ /* is_match = */ false);
+ break;
+ }
+
+ cmd = strdup(buf);
+ if (!cmd)
+ return log_oom();
+
+ r = ordered_hashmap_ensure_put(&event->run_list, NULL, cmd, token->data);
+ if (r == -ENOMEM)
+ return log_oom();
+ if (r < 0)
+ return log_event_error_errno(dev, token, r, "Failed to store command '%s': %m", cmd);
+
+ TAKE_PTR(cmd);
+
+ log_event_debug(dev, token, "RUN '%s'", token->value);
+ break;
+ }
+ case TK_A_OPTIONS_STATIC_NODE:
+ /* do nothing for events. */
+ break;
+ default:
+ assert_not_reached();
+ }
+
+ return true;
+}
+
+static bool token_is_for_parents(UdevRuleToken *token) {
+ return token->type >= TK_M_PARENTS_KERNEL && token->type <= TK_M_PARENTS_TAG;
+}
+
+static int udev_rule_apply_parent_token_to_event(
+ UdevRuleToken *head_token,
+ UdevEvent *event,
+ int timeout_signal) {
+
+ int r;
+
+ assert(head_token);
+ assert(event);
+
+ event->dev_parent = ASSERT_PTR(event->dev);
+
+ for (;;) {
+ LIST_FOREACH(tokens, token, head_token) {
+ if (!token_is_for_parents(token))
+ return true; /* All parent tokens match. */
+
+ r = udev_rule_apply_token_to_event(token, event->dev_parent, event, 0, timeout_signal, NULL);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+ }
+ if (r > 0)
+ /* All parent tokens match, and no more token (except for GOTO) in the line. */
+ return true;
+
+ if (sd_device_get_parent(event->dev_parent, &event->dev_parent) < 0) {
+ event->dev_parent = NULL;
+ return false;
+ }
+ }
+}
+
+static int udev_rule_apply_line_to_event(
+ UdevRuleLine *line,
+ UdevEvent *event,
+ usec_t timeout_usec,
+ int timeout_signal,
+ Hashmap *properties_list,
+ UdevRuleLine **next_line) {
+
+ UdevRuleLineType mask = LINE_HAS_GOTO | LINE_UPDATE_SOMETHING;
+ bool parents_done = false;
+ sd_device_action_t action;
+ int r;
+
+ assert(line);
+ assert(event);
+ assert(next_line);
+
+ r = sd_device_get_action(event->dev, &action);
+ if (r < 0)
+ return r;
+
+ if (action != SD_DEVICE_REMOVE) {
+ if (sd_device_get_devnum(event->dev, NULL) >= 0)
+ mask |= LINE_HAS_DEVLINK;
+
+ if (sd_device_get_ifindex(event->dev, NULL) >= 0)
+ mask |= LINE_HAS_NAME;
+ }
+
+ if ((line->type & mask) == 0)
+ return 0;
+
+ event->esc = ESCAPE_UNSET;
+
+ DEVICE_TRACE_POINT(rules_apply_line, event->dev, line->rule_file->filename, line->line_number);
+
+ LIST_FOREACH(tokens, token, line->tokens) {
+ if (token_is_for_parents(token)) {
+ if (parents_done)
+ continue;
+
+ r = udev_rule_apply_parent_token_to_event(token, event, timeout_signal);
+ if (r <= 0)
+ return r;
+
+ parents_done = true;
+ continue;
+ }
+
+ r = udev_rule_apply_token_to_event(token, event->dev, event, timeout_usec, timeout_signal, properties_list);
+ if (r <= 0)
+ return r;
+ }
+
+ if (line->goto_line)
+ *next_line = line->goto_line; /* update next_line only when the line has GOTO token. */
+
+ return 0;
+}
+
+int udev_rules_apply_to_event(
+ UdevRules *rules,
+ UdevEvent *event,
+ usec_t timeout_usec,
+ int timeout_signal,
+ Hashmap *properties_list) {
+
+ int r;
+
+ assert(rules);
+ assert(event);
+
+ LIST_FOREACH(rule_files, file, rules->rule_files)
+ LIST_FOREACH_WITH_NEXT(rule_lines, line, next_line, file->rule_lines) {
+ r = udev_rule_apply_line_to_event(line, event, timeout_usec, timeout_signal, properties_list, &next_line);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static int udev_rule_line_apply_static_dev_perms(UdevRuleLine *rule_line) {
+ _cleanup_strv_free_ char **tags = NULL;
+ uid_t uid = UID_INVALID;
+ gid_t gid = GID_INVALID;
+ mode_t mode = MODE_INVALID;
+ int r;
+
+ assert(rule_line);
+
+ if (!FLAGS_SET(rule_line->type, LINE_HAS_STATIC_NODE))
+ return 0;
+
+ LIST_FOREACH(tokens, token, rule_line->tokens)
+ if (token->type == TK_A_OWNER_ID)
+ uid = PTR_TO_UID(token->data);
+ else if (token->type == TK_A_GROUP_ID)
+ gid = PTR_TO_GID(token->data);
+ else if (token->type == TK_A_MODE_ID)
+ mode = PTR_TO_MODE(token->data);
+ else if (token->type == TK_A_TAG) {
+ r = strv_extend(&tags, token->value);
+ if (r < 0)
+ return log_oom();
+ } else if (token->type == TK_A_OPTIONS_STATIC_NODE) {
+ r = static_node_apply_permissions(token->value, mode, uid, gid, tags);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+int udev_rules_apply_static_dev_perms(UdevRules *rules) {
+ int r;
+
+ assert(rules);
+
+ LIST_FOREACH(rule_files, file, rules->rule_files)
+ LIST_FOREACH(rule_lines, line, file->rule_lines) {
+ r = udev_rule_line_apply_static_dev_perms(line);
+ if (r < 0)
+ return r;
+ }
+
+ return 0;
+}
+
+static const char* const resolve_name_timing_table[_RESOLVE_NAME_TIMING_MAX] = {
+ [RESOLVE_NAME_NEVER] = "never",
+ [RESOLVE_NAME_LATE] = "late",
+ [RESOLVE_NAME_EARLY] = "early",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(resolve_name_timing, ResolveNameTiming);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 15:55:29 +0000