summaryrefslogtreecommitdiff
path: root/libudev/libudev-device.c
diff options
context:
space:
mode:
Diffstat (limited to 'libudev/libudev-device.c')
-rw-r--r--libudev/libudev-device.c65
1 files changed, 27 insertions, 38 deletions
diff --git a/libudev/libudev-device.c b/libudev/libudev-device.c
index af0bc2e5a3..8b8507c3a4 100644
--- a/libudev/libudev-device.c
+++ b/libudev/libudev-device.c
@@ -60,8 +60,8 @@ struct udev_device {
size_t monitor_buf_len;
struct udev_list_node devlinks_list;
struct udev_list_node properties_list;
+ struct udev_list_node sysattr_value_list;
struct udev_list_node sysattr_list;
- struct udev_list_node available_sysattr_list;
struct udev_list_node tags_list;
unsigned long long int seqnum;
unsigned long long int usec_initialized;
@@ -84,7 +84,7 @@ struct udev_device {
bool db_loaded;
bool uevent_loaded;
bool is_initialized;
- bool sysattrs_cached;
+ bool sysattr_list_read;
};
struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
@@ -362,8 +362,8 @@ struct udev_device *udev_device_new(struct udev *udev)
udev_device->udev = udev;
udev_list_init(&udev_device->devlinks_list);
udev_list_init(&udev_device->properties_list);
+ udev_list_init(&udev_device->sysattr_value_list);
udev_list_init(&udev_device->sysattr_list);
- udev_list_init(&udev_device->available_sysattr_list);
udev_list_init(&udev_device->tags_list);
udev_device->event_timeout = -1;
udev_device->watch_handle = -1;
@@ -787,8 +787,8 @@ void udev_device_unref(struct udev_device *udev_device)
free(udev_device->devtype);
udev_list_cleanup_entries(udev_device->udev, &udev_device->devlinks_list);
udev_list_cleanup_entries(udev_device->udev, &udev_device->properties_list);
+ udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_value_list);
udev_list_cleanup_entries(udev_device->udev, &udev_device->sysattr_list);
- udev_list_cleanup_entries(udev_device->udev, &udev_device->available_sysattr_list);
udev_list_cleanup_entries(udev_device->udev, &udev_device->tags_list);
free(udev_device->action);
free(udev_device->driver);
@@ -1166,7 +1166,7 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
return NULL;
/* look for possibly already cached result */
- udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_list)) {
+ udev_list_entry_foreach(list_entry, udev_list_get_entry(&udev_device->sysattr_value_list)) {
if (strcmp(udev_list_entry_get_name(list_entry), sysattr) == 0) {
dbg(udev_device->udev, "got '%s' (%s) from cache\n",
sysattr, udev_list_entry_get_value(list_entry));
@@ -1177,7 +1177,7 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", sysattr, NULL);
if (lstat(path, &statbuf) != 0) {
dbg(udev_device->udev, "no attribute '%s', keep negative entry\n", path);
- udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, NULL, 0, 0);
+ udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, NULL, 0, 0);
goto out;
}
@@ -1201,7 +1201,7 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
if (pos != NULL) {
pos = &pos[1];
dbg(udev_device->udev, "cache '%s' with link value '%s'\n", sysattr, pos);
- list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, pos, 0, 0);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, pos, 0, 0);
val = udev_list_entry_get_value(list_entry);
}
@@ -1233,22 +1233,21 @@ const char *udev_device_get_sysattr_value(struct udev_device *udev_device, const
value[size] = '\0';
util_remove_trailing_chars(value, '\n');
dbg(udev_device->udev, "'%s' has attribute value '%s'\n", path, value);
- list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list, sysattr, value, 0, 0);
+ list_entry = udev_list_entry_add(udev_device->udev, &udev_device->sysattr_value_list, sysattr, value, 0, 0);
val = udev_list_entry_get_value(list_entry);
out:
return val;
}
-static int udev_device_cache_sysattrs(struct udev_device *udev_device)
+static int udev_device_sysattr_list_read(struct udev_device *udev_device)
{
- struct dirent *entry;
+ struct dirent *dent;
DIR *dir;
int num = 0;
if (udev_device == NULL)
return -1;
- /* caching already done? */
- if (udev_device->sysattrs_cached)
+ if (udev_device->sysattr_list_read)
return 0;
dir = opendir(udev_device_get_syspath(udev_device));
@@ -1258,37 +1257,28 @@ static int udev_device_cache_sysattrs(struct udev_device *udev_device)
return -1;
}
- while (NULL != (entry = readdir(dir))) {
+ for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
char path[UTIL_PATH_SIZE];
struct stat statbuf;
/* only handle symlinks and regular files */
- if (DT_LNK != entry->d_type && DT_REG != entry->d_type)
+ if (dent->d_type != DT_LNK && dent->d_type != DT_REG)
continue;
- util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device),
- "/", entry->d_name, NULL);
- if (0 != lstat(path, &statbuf))
+ util_strscpyl(path, sizeof(path), udev_device_get_syspath(udev_device), "/", dent->d_name, NULL);
+ if (lstat(path, &statbuf) != 0)
continue;
-
- if (0 == (statbuf.st_mode & S_IRUSR))
+ if ((statbuf.st_mode & S_IRUSR) == 0)
continue;
- if (DT_LNK == entry->d_type) {
- if (strcmp(entry->d_name, "driver") != 0 &&
- strcmp(entry->d_name, "subsystem") != 0 &&
- strcmp(entry->d_name, "module") != 0)
- continue;
- }
- udev_list_entry_add(udev_device->udev,
- &udev_device->available_sysattr_list, entry->d_name,
- DT_LNK == entry->d_type ? "s" : "r", 0, 0);
- ++num;
+ udev_list_entry_add(udev_device->udev, &udev_device->sysattr_list,
+ dent->d_name, NULL, 0, 0);
+ num++;
}
- dbg(udev_device->udev, "found %d sysattrs for '%s'\n", num,
- udev_device_get_syspath(udev_device));
- udev_device->sysattrs_cached = true;
+ closedir(dir);
+ dbg(udev_device->udev, "found %d sysattrs for '%s'\n", num, udev_device_get_syspath(udev_device));
+ udev_device->sysattr_list_read = true;
return num;
}
@@ -1298,22 +1288,21 @@ static int udev_device_cache_sysattrs(struct udev_device *udev_device)
* @udev_device: udev device
*
* Retrieve the list of available sysattrs, with value being empty;
- * This is to be able to read all available sysfs attributes for a particular
- * device without the necessity to access sysfs from outside libudev.
+ * This just return all available sysfs attributes for a particular
+ * device without reading their values.
*
* Returns: the first entry of the property list
**/
struct udev_list_entry *udev_device_get_sysattr_list_entry(struct udev_device *udev_device)
{
- /* perform initial caching of sysattr list */
- if (!udev_device->sysattrs_cached) {
+ if (!udev_device->sysattr_list_read) {
int ret;
- ret = udev_device_cache_sysattrs(udev_device);
+ ret = udev_device_sysattr_list_read(udev_device);
if (0 > ret)
return NULL;
}
- return udev_list_get_entry(&udev_device->available_sysattr_list);
+ return udev_list_get_entry(&udev_device->sysattr_list);
}
int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath)
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 03:09:33 +0000