git: bf95db1639af - stable/15 - gstat: Set errno = 0 before strtoul

The branch stable/15 has been updated by cperciva:

URL: https://cgit.FreeBSD.org/src/commit/?id=bf95db1639afd275a7d0c9aacde1a863ce649089

commit bf95db1639afd275a7d0c9aacde1a863ce649089
Author:     Colin Percival <cperciva@FreeBSD.org>
AuthorDate: 2026-08-29 20:22:15 +0000
Commit:     Colin Percival <cperciva@FreeBSD.org>
CommitDate: 2026-09-07 19:10:50 +0000

    gstat: Set errno = 0 before strtoul
    
    The strtoul function sets errno on error, but does not clear it on
    success; when using strtoul and checking errno (as one should) for
    ERANGE / EINVAL afterwards, it's important to zero errno first.
    
    While here, remove a dead store.
    
    Reviewed by:    phk
    Fixes:  4fe8c1b67be0 ("Add error and range checking ... ")
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D59270
    
    (cherry picked from commit 6ddb10cf6b7f870d749e96d2ae55976b18896f54)
---
 usr.sbin/gstat/gstat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/usr.sbin/gstat/gstat.c b/usr.sbin/gstat/gstat.c
index c650f7120a40..7bf5930939d5 100644
--- a/usr.sbin/gstat/gstat.c
+++ b/usr.sbin/gstat/gstat.c
@@ -142,7 +142,7 @@ main(int argc, char **argv)
 			strlcpy(f_s, optarg, sizeof(f_s));
 			break;
 		case 'I':
-			p = NULL;
+			errno = 0;
 			i = strtoul(optarg, &p, 0);
 			if (p == optarg || errno == EINVAL ||
 			    errno == ERANGE) {