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-rw-r--r--disk/part.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/disk/part.c b/disk/part.c
index 64d76e8..3022969 100644
--- a/disk/part.c
+++ b/disk/part.c
@@ -489,7 +489,8 @@ int get_device_and_partition(const char *ifname, const char *dev_part_str,
disk_partition_t tmpinfo;
/* If no dev_part_str, use bootdevice environment variable */
- if (!dev_part_str)
+ if (!dev_part_str || !strlen(dev_part_str) ||
+ !strcmp(dev_part_str, "-"))
dev_part_str = getenv("bootdevice");
/* If still no dev_part_str, it's an error */