From a7d56527c2fd0730eea2551087c3b785691603b2 Mon Sep 17 00:00:00 2001
From: Jose Luis Duran <jlduran@FreeBSD.org>
Date: Sun, 17 Nov 2024 23:55:14 +0000
Subject: [PATCH] geom: Allow BSD type '!0' partitions

Allow the creation of '!0' partition types.

Fix it by not considering "0" an invalid partition type.

Reviewed by:	emaste
Approved by:	emaste (mentor)
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D47652

(cherry picked from commit accf71534c612b76ee2701f2dfcaa464748e527a)
---
 sys/geom/part/g_part_bsd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/geom/part/g_part_bsd.c b/sys/geom/part/g_part_bsd.c
index bb1aed0cf59..625cdb4c727 100644
--- a/sys/geom/part/g_part_bsd.c
+++ b/sys/geom/part/g_part_bsd.c
@@ -136,7 +136,7 @@ bsd_parse_type(const char *type, uint8_t *fstype)
 
 	if (type[0] == '!') {
 		lt = strtol(type + 1, &endp, 0);
-		if (type[1] == '\0' || *endp != '\0' || lt <= 0 || lt >= 256)
+		if (type[1] == '\0' || *endp != '\0' || lt < 0 || lt >= 256)
 			return (EINVAL);
 		*fstype = (u_int)lt;
 		return (0);