Check that EWOULDBLOCK is the same as EAGAIN

[elogind.git] / src / libudev / libudev-device.c

diff --git a/src/libudev/libudev-device.c b/src/libudev/libudev-device.c
index a7647b9d9cc4920b7eb7223d7b8b4f794051c306..b518a2f891b93fb9549159fce78be6baa06d7a4c 100644 (file)
--- a/src/libudev/libudev-device.c
+++ b/src/libudev/libudev-device.c
@@ -445,6 +445,23 @@ static int udev_device_set_syspath(struct udev_device *udev_device, const char *
         return 0;
 }
 
+static void udev_device_set_usec_initialized(struct udev_device *udev_device, usec_t usec_initialized)
+{
+        char num[DECIMAL_STR_MAX(usec_t)];
+
+        udev_device->usec_initialized = usec_initialized;
+        snprintf(num, sizeof(num), USEC_FMT, usec_initialized);
+        udev_device_add_property_internal(udev_device, "USEC_INITIALIZED", num);
+}
+
+void udev_device_ensure_usec_initialized(struct udev_device *udev_device, struct udev_device *old_device)
+{
+        if (old_device && old_device->usec_initialized != 0)
+                udev_device_set_usec_initialized(udev_device, old_device->usec_initialized);
+        else
+                udev_device_set_usec_initialized(udev_device, now(CLOCK_MONOTONIC));
+}
+
 /*
  * parse property string, and if needed, update internal values accordingly
  *
@@ -565,30 +582,27 @@ _public_ const char *udev_device_get_property_value(struct udev_device *udev_dev
         return udev_list_entry_get_value(list_entry);
 }
 
-int udev_device_read_db(struct udev_device *udev_device, const char *dbfile)
+int udev_device_read_db(struct udev_device *udev_device)
 {
         char filename[UTIL_PATH_SIZE];
         char line[UTIL_LINE_SIZE];
+        const char *id;
         FILE *f;
 
-        /* providing a database file will always force-load it */
-        if (dbfile == NULL) {
-                const char *id;
+        if (udev_device->db_loaded)
+                return 0;
 
-                if (udev_device->db_loaded)
-                        return 0;
-                udev_device->db_loaded = true;
+        udev_device->db_loaded = true;
 
-                id = udev_device_get_id_filename(udev_device);
-                if (id == NULL)
-                        return -1;
-                strscpyl(filename, sizeof(filename), "/run/udev/data/", id, NULL);
-                dbfile = filename;
-        }
+        id = udev_device_get_id_filename(udev_device);
+        if (id == NULL)
+                return -1;
+
+        strscpyl(filename, sizeof(filename), "/run/udev/data/", id, NULL);
 
-        f = fopen(dbfile, "re");
+        f = fopen(filename, "re");
         if (f == NULL)
-                return log_debug_errno(errno, "no db file to read %s: %m", dbfile);
+                return log_debug_errno(errno, "no db file to read %s: %m", filename);
 
         /* devices with a database entry are initialized */
         udev_device->is_initialized = true;
@@ -1306,7 +1320,7 @@ _public_ struct udev_list_entry *udev_device_get_devlinks_list_entry(struct udev
         if (udev_device == NULL)
                 return NULL;
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         return udev_list_get_entry(&udev_device->devlinks_list);
 }
 
@@ -1334,7 +1348,7 @@ _public_ struct udev_list_entry *udev_device_get_properties_list_entry(struct ud
                 return NULL;
         if (!udev_device->info_loaded) {
                 udev_device_read_uevent_file(udev_device);
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         }
         if (!udev_device->devlinks_uptodate) {
                 char symlinks[UTIL_PATH_SIZE];
@@ -1407,7 +1421,7 @@ _public_ unsigned long long int udev_device_get_usec_since_initialized(struct ud
         if (udev_device == NULL)
                 return 0;
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         if (udev_device->usec_initialized == 0)
                 return 0;
         now_ts = now(CLOCK_MONOTONIC);
@@ -1421,15 +1435,6 @@ usec_t udev_device_get_usec_initialized(struct udev_device *udev_device)
         return udev_device->usec_initialized;
 }
 
-void udev_device_set_usec_initialized(struct udev_device *udev_device, usec_t usec_initialized)
-{
-        char num[32];
-
-        udev_device->usec_initialized = usec_initialized;
-        snprintf(num, sizeof(num), USEC_FMT, usec_initialized);
-        udev_device_add_property_internal(udev_device, "USEC_INITIALIZED", num);
-}
-
 /**
  * udev_device_get_sysattr_value:
  * @udev_device: udev device
@@ -1736,7 +1741,7 @@ const char *udev_device_get_id_filename(struct udev_device *udev_device)
 _public_ int udev_device_get_is_initialized(struct udev_device *udev_device)
 {
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         return udev_device->is_initialized;
 }
 
@@ -1796,7 +1801,7 @@ _public_ struct udev_list_entry *udev_device_get_tags_list_entry(struct udev_dev
         if (udev_device == NULL)
                 return NULL;
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         return udev_list_get_entry(&udev_device->tags_list);
 }
 
@@ -1816,7 +1821,7 @@ _public_ int udev_device_has_tag(struct udev_device *udev_device, const char *ta
         if (udev_device == NULL)
                 return false;
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         list_entry = udev_device_get_tags_list_entry(udev_device);
         if (udev_list_entry_get_by_name(list_entry, tag) != NULL)
                 return true;
@@ -1905,7 +1910,7 @@ int udev_device_set_action(struct udev_device *udev_device, const char *action)
 int udev_device_get_devlink_priority(struct udev_device *udev_device)
 {
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         return udev_device->devlink_priority;
 }
 
@@ -1918,7 +1923,7 @@ int udev_device_set_devlink_priority(struct udev_device *udev_device, int prio)
 int udev_device_get_watch_handle(struct udev_device *udev_device)
 {
         if (!udev_device->info_loaded)
-                udev_device_read_db(udev_device, NULL);
+                udev_device_read_db(udev_device);
         return udev_device->watch_handle;
 }
 
@@ -1989,6 +1994,20 @@ struct udev_device *udev_device_shallow_clone(struct udev_device *old_device)
         return device;
 }
 
+struct udev_device *udev_device_clone_with_db(struct udev_device *old_device)
+{
+        struct udev_device *device;
+
+        device = udev_device_shallow_clone(old_device);
+        if (!device)
+                return NULL;
+
+        udev_device_read_db(device);
+        udev_device_set_info_loaded(device);
+
+        return device;
+}
+
 struct udev_device *udev_device_new_from_nulstr(struct udev *udev, char *nulstr, ssize_t buflen) {
         struct udev_device *device;
         ssize_t bufpos = 0;
@@ -2033,3 +2052,18 @@ struct udev_device *udev_device_new_from_nulstr(struct udev *udev, char *nulstr,
 
         return device;
 }
+
+int udev_device_copy_properties(struct udev_device *dst, struct udev_device *src) {
+        struct udev_list_entry *entry;
+
+        for ((entry = udev_device_get_properties_list_entry(src)); entry; entry = udev_list_entry_get_next(entry)) {
+                const char *key, *value;
+
+                key = udev_list_entry_get_name(entry);
+                value = udev_list_entry_get_value(entry);
+
+                udev_device_add_property(dst, key, value);
+        }
+
+        return 0;
+}