X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Flibelogind%2Fsd-device%2Fsd-device.c;h=ddb7b93ae70bfefe2b99a665c2170da7dff2ae85;hb=165d7d44bd29a34a0bc598314884e3204d8f753d;hp=7a7b323f3ce61ab4d57668cb454f55a724f504a7;hpb=ce7df9fb79cd1b48dfa9ddf8662a2f9ed2884eb3;p=elogind.git

diff --git a/src/libelogind/sd-device/sd-device.c b/src/libelogind/sd-device/sd-device.c
index 7a7b323f3..ddb7b93ae 100644
--- a/src/libelogind/sd-device/sd-device.c
+++ b/src/libelogind/sd-device/sd-device.c
@@ -500,6 +500,8 @@ int device_read_uevent_file(sd_device *device) {
         if (device->uevent_loaded || device->sealed)
                 return 0;
 
+        device->uevent_loaded = true;
+
         r = sd_device_get_syspath(device, &syspath);
         if (r < 0)
                 return r;
@@ -510,6 +512,9 @@ int device_read_uevent_file(sd_device *device) {
         if (r == -EACCES)
                 /* empty uevent files may be write-only */
                 return 0;
+        else if (r == -ENOENT)
+                /* some devices may not have uevent files, see set_syspath() */
+                return 0;
         else if (r < 0) {
                 log_debug("sd-device: failed to read uevent file '%s': %s", path, strerror(-r));
                 return r;
@@ -567,8 +572,6 @@ int device_read_uevent_file(sd_device *device) {
                         log_debug("sd-device: could not set 'MAJOR=%s' or 'MINOR=%s' from '%s': %s", major, minor, path, strerror(-r));
         }
 
-        device->uevent_loaded = true;
-
         return 0;
 }
 
@@ -782,7 +785,7 @@ _public_ int sd_device_get_subsystem(sd_device *device, const char **ret) {
                          path_startswith(device->devpath, "/class/") ||
                          path_startswith(device->devpath, "/bus/"))
                         r = device_set_subsystem(device, "subsystem");
-                if (r < 0)
+                if (r < 0 && r != -ENOENT)
                         return log_debug_errno(r, "sd-device: could not set subsystem for %s: %m", device->devpath);
 
                 device->subsystem_set = true;
@@ -898,8 +901,11 @@ _public_ int sd_device_get_driver(sd_device *device, const char **ret) {
                 if (r >= 0) {
                         r = device_set_driver(device, driver);
                         if (r < 0)
-                                return r;
-                }
+                                return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath);
+                } else if (r == -ENOENT)
+                        device->driver_set = true;
+                else
+                        return log_debug_errno(r, "sd-device: could not set driver for %s: %m", device->devpath);
         }
 
         *ret = device->driver;
@@ -1185,17 +1191,19 @@ int device_get_id_filename(sd_device *device, const char **ret) {
                         return r;
 
                 if (major(devnum) > 0) {
+                        assert(subsystem);
+
                         /* use dev_t -- b259:131072, c254:0 */
                         r = asprintf(&id, "%c%u:%u",
                                      streq(subsystem, "block") ? 'b' : 'c',
                                      major(devnum), minor(devnum));
                         if (r < 0)
-                                return -errno;
+                                return -ENOMEM;
                 } else if (ifindex > 0) {
                         /* use netdev ifindex -- n3 */
                         r = asprintf(&id, "n%u", ifindex);
                         if (r < 0)
-                                return -errno;
+                                return -ENOMEM;
                 } else {
                         /* use $subsys:$sysname -- pci:0000:00:1f.2
                          * sysname() has '!' translated, get it from devpath
@@ -1206,9 +1214,12 @@ int device_get_id_filename(sd_device *device, const char **ret) {
                         if (!sysname)
                                 return -EINVAL;
 
+                        if (!subsystem)
+                                return -EINVAL;
+
                         r = asprintf(&id, "+%s:%s", subsystem, sysname);
                         if (r < 0)
-                                return -errno;
+                                return -ENOMEM;
                 }
 
                 device->id_filename = id;
@@ -1220,7 +1231,7 @@ int device_get_id_filename(sd_device *device, const char **ret) {
         return 0;
 }
 
-static int device_read_db(sd_device *device) {
+int device_read_db_aux(sd_device *device, bool force) {
         _cleanup_free_ char *db = NULL;
         char *path;
         const char *id, *value;
@@ -1237,9 +1248,11 @@ static int device_read_db(sd_device *device) {
                 INVALID_LINE,
         } state = PRE_KEY;
 
-        if (device->db_loaded || device->sealed)
+        if (device->db_loaded || (!force && device->sealed))
                 return 0;
 
+        device->db_loaded = true;
+
         r = device_get_id_filename(device, &id);
         if (r < 0)
                 return r;
@@ -1308,11 +1321,13 @@ static int device_read_db(sd_device *device) {
                 }
         }
 
-        device->db_loaded = true;
-
         return 0;
 }
 
+static int device_read_db(sd_device *device) {
+        return device_read_db_aux(device, false);
+}
+
 _public_ int sd_device_get_is_initialized(sd_device *device, int *initialized) {
         int r;