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-rw-r--r--udev/lib/libudev-device.c64
-rw-r--r--udev/lib/libudev-monitor.c38
-rw-r--r--udev/lib/libudev-private.h1
3 files changed, 68 insertions, 35 deletions
diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index 8812f1fc84..dc198f0a0a 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -47,6 +47,8 @@ struct udev_device {
char *action;
char *devpath_old;
char *physdevpath;
+ char *monitor_buf;
+ size_t monitor_buf_len;
struct udev_list_node devlinks_list;
struct udev_list_node properties_list;
struct udev_list_node sysattr_list;
@@ -617,6 +619,7 @@ void udev_device_unref(struct udev_device *udev_device)
free(udev_device->envp[i]);
free(udev_device->envp);
}
+ free(udev_device->monitor_buf);
info(udev_device->udev, "udev_device: %p released\n", udev_device);
free(udev_device);
}
@@ -983,6 +986,7 @@ int udev_device_add_devlink(struct udev_device *udev_device, const char *devlink
struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value)
{
+ udev_device->monitor_buf_len = 0;
udev_device->envp_uptodate = 0;
if (value == NULL) {
struct udev_list_entry *list_entry;
@@ -1018,11 +1022,12 @@ char **udev_device_get_properties_envp(struct udev_device *udev_device)
unsigned int i;
struct udev_list_entry *list_entry;
- if (udev_device->envp) {
+ if (udev_device->envp != NULL) {
for (i = 0; i < ENVP_SIZE && udev_device->envp[i] != NULL; i++)
free(udev_device->envp[i]);
- } else
+ } else {
udev_device->envp = malloc(sizeof(char *) * ENVP_SIZE);
+ }
i = 0;
udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
@@ -1039,6 +1044,61 @@ char **udev_device_get_properties_envp(struct udev_device *udev_device)
return udev_device->envp;
}
+#define MONITOR_BUF_SIZE 4096
+ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf)
+{
+ if (udev_device->monitor_buf_len == 0) {
+ const char *action;
+ struct udev_list_entry *list_entry;
+ size_t bufpos;
+ size_t len;
+
+ free(udev_device->monitor_buf);
+ udev_device->monitor_buf = malloc(MONITOR_BUF_SIZE);
+ if (udev_device->monitor_buf == NULL)
+ return -ENOMEM;
+
+ /* header <action>@<devpath> */
+ action = udev_device_get_action(udev_device);
+ if (action == NULL)
+ return -EINVAL;
+ bufpos = util_strlcpy(udev_device->monitor_buf, action, MONITOR_BUF_SIZE);
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "@", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_device_get_devpath(udev_device),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;
+
+ /* property strings */
+ udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos],
+ udev_list_entry_get_name(list_entry), MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], "=", MONITOR_BUF_SIZE-bufpos);
+ if (len >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len;
+ len = util_strlcpy(&udev_device->monitor_buf[bufpos], udev_list_entry_get_value(list_entry),
+ MONITOR_BUF_SIZE-bufpos);
+ if (len+1 >= MONITOR_BUF_SIZE-bufpos)
+ return -EINVAL;
+ bufpos += len+1;
+ }
+printf("created buf %p, size %zu '%s'\n", udev_device->monitor_buf, bufpos, udev_device->monitor_buf);
+ udev_device->monitor_buf_len = bufpos;
+ }
+ *buf = udev_device->monitor_buf;
+printf("return buf %p, size %zu '%s'\n", *buf, udev_device->monitor_buf_len, *buf);
+ return udev_device->monitor_buf_len;
+}
+
int udev_device_set_action(struct udev_device *udev_device, const char *action)
{
free(udev_device->action);
diff --git a/udev/lib/libudev-monitor.c b/udev/lib/libudev-monitor.c
index 9f13917042..f70bdb2d03 100644
--- a/udev/lib/libudev-monitor.c
+++ b/udev/lib/libudev-monitor.c
@@ -380,43 +380,15 @@ struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monito
int udev_monitor_send_device(struct udev_monitor *udev_monitor, struct udev_device *udev_device)
{
- const char *action;
- struct udev_list_entry *list_entry;
- char buf[4096];
- size_t bufpos;
- size_t len;
+ const char *buf;
+ ssize_t len;
ssize_t count;
- action = udev_device_get_action(udev_device);
- if (action == NULL)
- return -EINVAL;
-
- bufpos = util_strlcpy(buf, action, sizeof(buf));
- len = util_strlcpy(&buf[bufpos], "@", sizeof(buf)-bufpos);
- if (len >= sizeof(buf)-bufpos)
+ len = udev_device_get_properties_monitor_buf(udev_device, &buf);
+ if (len < 32)
return -1;
- bufpos += len;
- len = util_strlcpy(&buf[bufpos], udev_device_get_devpath(udev_device), sizeof(buf)-bufpos);
- if (len+1 >= sizeof(buf)-bufpos)
- return -1;
- bufpos += len+1;
- udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
- len = util_strlcpy(&buf[bufpos], udev_list_entry_get_name(list_entry), sizeof(buf)-bufpos);
- if (len >= sizeof(buf)-bufpos)
- return -1;
- bufpos += len;
- len = util_strlcpy(&buf[bufpos], "=", sizeof(buf)-bufpos);
- if (len >= sizeof(buf)-bufpos)
- return -1;
- bufpos += len;
- len = util_strlcpy(&buf[bufpos], udev_list_entry_get_value(list_entry), sizeof(buf)-bufpos);
- if (len+1 >= sizeof(buf)-bufpos)
- return -1;
- bufpos += len+1;
- }
-
count = sendto(udev_monitor->sock,
- &buf, bufpos, 0,
+ buf, len, 0,
(struct sockaddr *)&udev_monitor->sun, udev_monitor->addrlen);
info(udev_monitor->udev, "passed %zi bytes to monitor %p, \n", count, udev_monitor);
return count;
diff --git a/udev/lib/libudev-private.h b/udev/lib/libudev-private.h
index 0dda4c3b5e..11e9ad9cb3 100644
--- a/udev/lib/libudev-private.h
+++ b/udev/lib/libudev-private.h
@@ -62,6 +62,7 @@ extern void udev_device_cleanup_devlinks_list(struct udev_device *udev_device);
extern struct udev_list_entry *udev_device_add_property(struct udev_device *udev_device, const char *key, const char *value);
extern struct udev_list_entry *udev_device_add_property_from_string(struct udev_device *udev_device, const char *property);
extern char **udev_device_get_properties_envp(struct udev_device *udev_device);
+extern ssize_t udev_device_get_properties_monitor_buf(struct udev_device *udev_device, const char **buf);
extern int udev_device_read_db(struct udev_device *udev_device);
extern int udev_device_read_uevent_file(struct udev_device *udev_device);
extern int udev_device_set_action(struct udev_device *udev_device, const char *action);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-20 16:57:12 +0000