sd-network: introduce sd_network_link_get_stat()

yuwata · yuwata · commit 8e0bacab6eed · 2021-12-08T18:34:04.000+09:00
diff --git a/src/libsystemd/sd-network/sd-network.c b/src/libsystemd/sd-network/sd-network.c
@@ -387,6 +387,23 @@ int sd_network_link_get_carrier_bound_by(int ifindex, int **ret) {
         return network_link_get_ifindexes(ifindex, "CARRIER_BOUND_BY", ret);
 }
 
+int sd_network_link_get_stat(int ifindex, struct stat *ret) {
+        char path[STRLEN("/run/systemd/netif/links/") + DECIMAL_STR_MAX(ifindex)];
+        struct stat st;
+
+        assert_return(ifindex > 0, -EINVAL);
+
+        xsprintf(path, "/run/systemd/netif/links/%i", ifindex);
+
+        if (stat(path, &st) < 0)
+                return -errno;
+
+        if (ret)
+                *ret = st;
+
+        return 0;
+}
+
 static int MONITOR_TO_FD(sd_network_monitor *m) {
         return (int) (unsigned long) m - 1;
 }
diff --git a/src/systemd/sd-network.h b/src/systemd/sd-network.h
@@ -18,6 +18,7 @@
 ***/
 
 #include <inttypes.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 
 #include "_sd-common.h"
@@ -187,6 +188,8 @@ int sd_network_link_get_dhcp6_client_iaid_string(int ifindex, char **iaid);
 /* Get DHCPv6 client DUID for a given link. */
 int sd_network_link_get_dhcp6_client_duid_string(int ifindex, char **duid);
 
+int sd_network_link_get_stat(int ifindex, struct stat *ret);
+
 /* Monitor object */
 typedef struct sd_network_monitor sd_network_monitor;
 
