add mac address to device info

[project/netifd.git] / system-linux.c

diff --git a/system-linux.c b/system-linux.c
index f2ee10a..1fcf22f 100644 (file)
--- a/system-linux.c
+++ b/system-linux.c
@@ -640,24 +640,28 @@ system_if_get_parent(struct device *dev)
 }
 
 static bool
-read_int_file(int dir_fd, const char *file, int *val)
+read_string_file(int dir_fd, const char *file, char *buf, int len)
 {
-       char buf[64];
-       int len, fd;
        bool ret = false;
+       char *c;
+       int fd;
 
        fd = openat(dir_fd, file, O_RDONLY);
        if (fd < 0)
                return false;
 
 retry:
-       len = read(fd, buf, sizeof(buf));
+       len = read(fd, buf, len - 1);
        if (len < 0) {
                if (errno == EINTR)
                        goto retry;
        } else if (len > 0) {
                        buf[len] = 0;
-                       *val = strtoul(buf, NULL, 0);
+
+                       c = strchr(buf, '\n');
+                       if (c)
+                               *c = 0;
+
                        ret = true;
        }
 
@@ -666,6 +670,19 @@ retry:
        return ret;
 }
 
+static bool
+read_int_file(int dir_fd, const char *file, int *val)
+{
+       char buf[64];
+       bool ret = false;
+
+       ret = read_string_file(dir_fd, file, buf, sizeof(buf));
+       if (ret)
+               *val = strtoul(buf, NULL, 0);
+
+       return ret;
+}
+
 int
 system_if_dump_info(struct device *dev, struct blob_buf *b)
 {
@@ -677,6 +694,8 @@ system_if_dump_info(struct device *dev, struct blob_buf *b)
 
        if (read_int_file(dir_fd, "carrier", &val))
                blobmsg_add_u8(b, "link", !!val);
+       if (read_string_file(dir_fd, "address", buf, sizeof(buf)))
+               blobmsg_add_string(b, "macaddr", buf);
 
        close(dir_fd);
        return 0;