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-rw-r--r--src/libudev/libudev-device.c45
-rw-r--r--src/libudev/libudev-monitor.c34
-rw-r--r--src/libudev/libudev-private.h1
3 files changed, 53 insertions, 27 deletions
diff --git a/src/libudev/libudev-device.c b/src/libudev/libudev-device.c
index 08331a2329..6031237762 100644
--- a/src/libudev/libudev-device.c
+++ b/src/libudev/libudev-device.c
@@ -1965,3 +1965,48 @@ struct udev_device *udev_device_shallow_clone(struct udev_device *old_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;
+
+ if (nulstr == NULL || buflen <= 0) {
+ errno = EINVAL;
+
+ return NULL;
+ }
+
+ device = udev_device_new(udev);
+ if (!device) {
+ errno = ENOMEM;
+
+ return NULL;
+ }
+
+ udev_device_set_info_loaded(device);
+
+ while (bufpos < buflen) {
+ char *key;
+ size_t keylen;
+
+ key = nulstr + bufpos;
+ keylen = strlen(key);
+ if (keylen == 0)
+ break;
+
+ bufpos += keylen + 1;
+ udev_device_add_property_from_string_parse(device, key);
+ }
+
+ if (udev_device_add_property_from_string_parse_finish(device) < 0) {
+ log_debug("missing values, invalid device");
+
+ udev_device_unref(device);
+
+ errno = EINVAL;
+
+ return NULL;
+ }
+
+ return device;
+}
diff --git a/src/libudev/libudev-monitor.c b/src/libudev/libudev-monitor.c
index 4cfb2f617c..08ddde8fd7 100644
--- a/src/libudev/libudev-monitor.c
+++ b/src/libudev/libudev-monitor.c
@@ -585,6 +585,7 @@ _public_ struct udev_device *udev_monitor_receive_device(struct udev_monitor *ud
} buf;
ssize_t buflen;
ssize_t bufpos;
+ bool is_initialized = false;
retry:
if (udev_monitor == NULL)
@@ -638,63 +639,42 @@ retry:
return NULL;
}
- udev_device = udev_device_new(udev_monitor->udev);
- if (udev_device == NULL)
- return NULL;
-
if (memcmp(buf.raw, "libudev", 8) == 0) {
/* udev message needs proper version magic */
if (buf.nlh.magic != htonl(UDEV_MONITOR_MAGIC)) {
log_debug("unrecognized message signature (%x != %x)",
buf.nlh.magic, htonl(UDEV_MONITOR_MAGIC));
- udev_device_unref(udev_device);
return NULL;
}
if (buf.nlh.properties_off+32 > (size_t)buflen) {
- udev_device_unref(udev_device);
return NULL;
}
bufpos = buf.nlh.properties_off;
/* devices received from udev are always initialized */
- udev_device_set_is_initialized(udev_device);
+ is_initialized = true;
} else {
/* kernel message with header */
bufpos = strlen(buf.raw) + 1;
if ((size_t)bufpos < sizeof("a@/d") || bufpos >= buflen) {
log_debug("invalid message length");
- udev_device_unref(udev_device);
return NULL;
}
/* check message header */
if (strstr(buf.raw, "@/") == NULL) {
log_debug("unrecognized message header");
- udev_device_unref(udev_device);
return NULL;
}
}
- udev_device_set_info_loaded(udev_device);
-
- while (bufpos < buflen) {
- char *key;
- size_t keylen;
-
- key = &buf.raw[bufpos];
- keylen = strlen(key);
- if (keylen == 0)
- break;
- bufpos += keylen + 1;
- udev_device_add_property_from_string_parse(udev_device, key);
- }
-
- if (udev_device_add_property_from_string_parse_finish(udev_device) < 0) {
- log_debug("missing values, invalid device");
- udev_device_unref(udev_device);
+ udev_device = udev_device_new_from_nulstr(udev_monitor->udev, &buf.raw[bufpos], buflen - bufpos);
+ if (!udev_device)
return NULL;
- }
+
+ if (is_initialized)
+ udev_device_set_is_initialized(udev_device);
/* skip device, if it does not pass the current filter */
if (!passes_filter(udev_monitor, udev_device)) {
diff --git a/src/libudev/libudev-private.h b/src/libudev/libudev-private.h
index 31f150c764..d8bc647e9c 100644
--- a/src/libudev/libudev-private.h
+++ b/src/libudev/libudev-private.h
@@ -38,6 +38,7 @@ int udev_get_rules_path(struct udev *udev, char **path[], usec_t *ts_usec[]);
/* libudev-device.c */
struct udev_device *udev_device_new(struct udev *udev);
+struct udev_device *udev_device_new_from_nulstr(struct udev *udev, char *nulstr, ssize_t buflen);
struct udev_device *udev_device_shallow_clone(struct udev_device *old_device);
mode_t udev_device_get_devnode_mode(struct udev_device *udev_device);
uid_t udev_device_get_devnode_uid(struct udev_device *udev_device);