[PATCH] udevinfo symlink reverse query

[elogind.git] / udevdb.c

diff --git a/udevdb.c b/udevdb.c
index a1f79a7c65b016b39bc0b0b295d8ef107252ecdd..95bc06ce6725669d9039fc8f9d4284d6f589173d 100644 (file)
--- a/udevdb.c
+++ b/udevdb.c
@@ -27,6 +27,7 @@
 #define _KLIBC_HAS_ARCH_SIG_ATOMIC_T
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 #include <fcntl.h>
 #include <string.h>
 #include <sys/stat.h>
@@ -178,13 +179,29 @@ static int find_found;
 
 static int find_device_by_name(char *path, struct udevice *dev)
 {
+       int l, i, j;
        if (strncmp(dev->name, find_name, sizeof(dev->name)) == 0) {
-               memcpy(find_dev, dev, sizeof(*find_dev));
-               strfieldcpy(find_path, path);
+               memcpy(find_dev, dev, sizeof(struct udevice));
+               strnfieldcpy(find_path, path, NAME_SIZE);
                find_found = 1;
                /* stop search */
                return 1;
        }
+       /* look for matching symlink*/
+       l = strlen(dev->symlink);
+       if (!l)
+               return 0;
+       i = j = 0;
+       do {
+               j = strcspn(&dev->symlink[i], " ");
+               if (j && strncmp(&dev->symlink[i], find_name, j) == 0) {
+                       memcpy(find_dev, dev, sizeof(struct udevice));
+                       strnfieldcpy(find_path, path, NAME_SIZE);
+                       find_found = 1;
+                       return 1;
+               }
+               i = i + j + 1;
+       } while (i < l);
        return 0;
 }