From c0a0f12f9b7c596f08ab58fe4d42b7c75741da3e Mon Sep 17 00:00:00 2001
From: Warner Losh <imp@FreeBSD.org>
Date: Tue, 21 Nov 2017 07:35:29 +0000
Subject: [PATCH] This program is more useful if it skips leading whitespace
 when parsing a textual UEFI Device Path, since otherwise it things the passed
 in path is a filename. While here, reduce the repetition of 8192.

Sponsored by: Netflix
---
 usr.sbin/efidp/efidp.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/usr.sbin/efidp/efidp.c b/usr.sbin/efidp/efidp.c
index a96cf9f70b6..c9b100bd630 100644
--- a/usr.sbin/efidp/efidp.c
+++ b/usr.sbin/efidp/efidp.c
@@ -27,6 +27,7 @@
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <ctype.h>
 #include <efivar.h>
 #include <efivar-dp.h>
 #include <err.h>
@@ -133,16 +134,22 @@ main(int argc, char **argv)
 	} else if (flag_parse) {
 		efidp dp;
 		ssize_t dplen;
-		char *str;
+		char *str, *walker;
 
-		dp = malloc(8192);
+		dplen = 8192;
+		dp = malloc(dplen);
 		str = realloc(data, len + 1);
 		if (str == NULL || dp == NULL)
 			errx(1, "Can't allocate memory.");
 		str[len] = '\0';
-		dplen = efidp_parse_device_path(str, dp, 8192);
+		walker = str;
+		while (isspace(*walker))
+			walker++;
+		dplen = efidp_parse_device_path(walker, dp, dplen);
 		if (dplen == -1)
-			errx(1, "Can't parse %s", str);
+			errx(1, "Can't parse %s", walker);
 		write(STDOUT_FILENO, dp, dplen);
+		free(dp);
+		free(str);
 	}
 }