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-rw-r--r--src/udev/udev-rules.c137
-rw-r--r--src/udev/udev.h1
2 files changed, 50 insertions, 88 deletions
diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
index e73b1561cb..22b91c6797 100644
--- a/src/udev/udev-rules.c
+++ b/src/udev/udev-rules.c
@@ -36,13 +36,6 @@
#define PREALLOC_STRBUF 32 * 1024
#define PREALLOC_TRIE 256
-/* configuration directories with last modification timestamp */
-static const char *rules_dirs[] = {
- TEST_PREFIX UDEVLIBEXECDIR "/rules.d",
- TEST_PREFIX "/run/udev/rules.d",
- TEST_PREFIX SYSCONFDIR "/udev/rules.d",
-};
-
struct uid_gid {
unsigned int name_off;
union {
@@ -65,7 +58,8 @@ struct trie_node {
struct udev_rules {
struct udev *udev;
- unsigned long long dirs_ts_usec[ELEMENTSOF(rules_dirs)];
+ char **dirs;
+ unsigned long long *dirs_ts_usec;
int resolve_names;
/* every key in the rules file becomes a token */
@@ -79,7 +73,7 @@ struct udev_rules {
size_t buf_max;
unsigned int buf_count;
- /* during rule parsing, strings are indexed to find duplicates */
+ /* during rule parsing, strings are indexed and de-duplicated */
struct trie_node *trie_nodes;
unsigned int trie_nodes_cur;
unsigned int trie_nodes_max;
@@ -1188,7 +1182,9 @@ static int add_rule(struct udev_rules *rules, char *line,
memset(&rule_tmp, 0x00, sizeof(struct rule_tmp));
rule_tmp.rules = rules;
rule_tmp.rule.type = TK_RULE;
- rule_tmp.rule.rule.filename_off = filename_off;
+ /* the offset in the rule is limited to unsigned short */
+ if (filename_off < USHRT_MAX)
+ rule_tmp.rule.rule.filename_off = filename_off;
rule_tmp.rule.rule.filename_line = lineno;
linepos = line;
@@ -1632,21 +1628,27 @@ invalid:
return -1;
}
-static int parse_file(struct udev_rules *rules, const char *filename, unsigned short filename_off)
+static int parse_file(struct udev_rules *rules, const char *filename)
{
FILE *f;
unsigned int first_token;
+ unsigned int filename_off;
char line[UTIL_LINE_SIZE];
int line_nr = 0;
unsigned int i;
- log_debug("reading '%s' as rules file\n", filename);
+ if (null_or_empty_path(filename)) {
+ log_debug("skip empty file: %s\n", filename);
+ return 0;
+ }
+ log_debug("read rules file: %s\n", filename);
f = fopen(filename, "r");
if (f == NULL)
return -1;
first_token = rules->token_cur;
+ filename_off = add_string(rules, filename);
while (fgets(line, sizeof(line), f) != NULL) {
char *key;
@@ -1707,52 +1709,13 @@ static int parse_file(struct udev_rules *rules, const char *filename, unsigned s
return 0;
}
-static int add_matching_files(struct udev *udev, struct udev_list *file_list, const char *dirname, const char *suffix)
-{
- DIR *dir;
- struct dirent *dent;
- char filename[UTIL_PATH_SIZE];
-
- dir = opendir(dirname);
- if (dir == NULL) {
- log_debug("unable to open '%s': %m\n", dirname);
- return -1;
- }
-
- for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
- if (dent->d_name[0] == '.')
- continue;
-
- /* look for file matching with specified suffix */
- if (suffix != NULL) {
- const char *ext;
-
- ext = strrchr(dent->d_name, '.');
- if (ext == NULL)
- continue;
- if (!streq(ext, suffix))
- continue;
- }
- util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
- /*
- * the basename is the key, the filename the value
- * identical basenames from different directories override each other
- * entries are sorted after basename
- */
- udev_list_entry_add(file_list, dent->d_name, filename);
- }
-
- closedir(dir);
- return 0;
-}
-
struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
{
struct udev_rules *rules;
struct udev_list file_list;
- struct udev_list_entry *file_loop;
struct token end_token;
- unsigned int i;
+ char **files, **f;
+ int r;
rules = calloc(1, sizeof(struct udev_rules));
if (rules == NULL)
@@ -1792,41 +1755,37 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
memset(rules->trie_nodes, 0x00, sizeof(struct trie_node));
rules->trie_nodes_cur = 1;
- for (i = 0; i < ELEMENTSOF(rules_dirs); i++)
- add_matching_files(udev, &file_list, rules_dirs[i], ".rules");
-
- /* add all filenames to the string buffer */
- udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
- const char *filename = udev_list_entry_get_value(file_loop);
- unsigned int filename_off;
-
- filename_off = add_string(rules, filename);
- /* the offset in the rule is limited to unsigned short */
- if (filename_off < USHRT_MAX)
- udev_list_entry_set_num(file_loop, filename_off);
+ rules->dirs = strv_new(TEST_PREFIX SYSCONFDIR "/udev/rules.d",
+ TEST_PREFIX "/run/udev/rules.d",
+ TEST_PREFIX UDEVLIBEXECDIR "/rules.d",
+ NULL);
+ if (!rules->dirs) {
+ log_error("failed to build config directory array");
+ return NULL;
+ }
+ if (!strv_path_canonicalize(rules->dirs)) {
+ log_error("failed to canonicalize config directories\n");
+ return NULL;
+ }
+ strv_uniq(rules->dirs);
+ r = conf_files_list_strv(&files, ".rules", (const char **)rules->dirs);
+ if (r < 0) {
+ log_error("failed to enumerate rules files: %s\n", strerror(-r));
+ return NULL;
}
+ rules->dirs_ts_usec = calloc(strv_length(rules->dirs), sizeof(long long));
- /* parse all rules files */
- udev_list_entry_foreach(file_loop, udev_list_get_entry(&file_list)) {
- const char *filename = udev_list_entry_get_value(file_loop);
- unsigned int filename_off = udev_list_entry_get_num(file_loop);
- struct stat st;
+ /*
+ * The offset value in the rules strct is limited; add all
+ * rules file names to the beginning of the string buffer.
+ */
+ STRV_FOREACH(f, files)
+ add_string(rules, *f);
- if (stat(filename, &st) != 0) {
- log_error("can not find '%s': %m\n", filename);
- continue;
- }
- if (S_ISREG(st.st_mode) && st.st_size <= 0) {
- log_debug("ignore empty '%s'\n", filename);
- continue;
- }
- if (S_ISCHR(st.st_mode)) {
- log_debug("ignore masked '%s'\n", filename);
- continue;
- }
- parse_file(rules, filename, filename_off);
- }
- udev_list_cleanup(&file_list);
+ STRV_FOREACH(f, files)
+ parse_file(rules, *f);
+
+ strv_free(files);
memset(&end_token, 0x00, sizeof(struct token));
end_token.type = TK_END;
@@ -1886,6 +1845,8 @@ struct udev_rules *udev_rules_unref(struct udev_rules *rules)
free(rules->trie_nodes);
free(rules->uids);
free(rules->gids);
+ strv_free(rules->dirs);
+ free(rules->dirs_ts_usec);
free(rules);
return NULL;
}
@@ -1895,10 +1856,10 @@ bool udev_rules_check_timestamp(struct udev_rules *rules)
unsigned int i;
bool changed = false;
- for (i = 0; i < ELEMENTSOF(rules_dirs); i++) {
+ for (i = 0; rules->dirs[i]; i++) {
struct stat stats;
- if (stat(rules_dirs[i], &stats) < 0)
+ if (stat(rules->dirs[i], &stats) < 0)
continue;
if (rules->dirs_ts_usec[i] == ts_usec(&stats.st_mtim))
@@ -1906,7 +1867,7 @@ bool udev_rules_check_timestamp(struct udev_rules *rules)
/* first check */
if (rules->dirs_ts_usec[i] != 0) {
- log_debug("reload - timestamp of '%s' changed\n", rules_dirs[i]);
+ log_debug("reload - timestamp of '%s' changed\n", rules->dirs[i]);
changed = true;
}
diff --git a/src/udev/udev.h b/src/udev/udev.h
index aaaf632209..56eff00936 100644
--- a/src/udev/udev.h
+++ b/src/udev/udev.h
@@ -27,6 +27,7 @@
#include "libudev-private.h"
#include "util.h"
#include "label.h"
+#include "strv.h"
struct udev_event {
struct udev *udev;
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-02 06:31:49 +0000