A fix for pkgtools/mksandbox

[Lloyd Parkes <lloyd%must-have-coffee.gen.nz@localhost>]

Kia ora,
Can I commit the following patch to pkgtools/mksandbox during the pkgsrc 
freeze?

Without this patch security/sudo will build a defective binary when 
built in a sandbox. The resulting sudo program crashes when trying to 
record the fact that the user has accepted the sudo lecture.

I have no idea how much of our published packages get built in a 
sandbox, but I'm guessing not much because nobody has noticed this sudo 
problem before.

I have tested this patch on NetBSD and Linux.

Ngā mihi,
Lloyd

--------------------------8<---------------------------

cvs diff: Diffing .
Index: Makefile
===================================================================
RCS file: /vol/source/cvs/mirror/pkgsrc/pkgtools/mksandbox/Makefile,v
retrieving revision 1.19
diff -u -r1.19 Makefile
--- Makefile    5 Dec 2023 20:45:27 -0000       1.19
+++ Makefile    16 Dec 2025 21:09:29 -0000
@@ -1,6 +1,6 @@
 # $NetBSD: Makefile,v 1.18 2023/08/31 20:14:35 triaxx Exp $

-PKGNAME=       mksandbox-1.11
+PKGNAME=       mksandbox-1.12
 CATEGORIES=    pkgtools

 MAINTAINER=    agc%NetBSD.org@localhost
cvs diff: Diffing files
Index: files/mksandbox
===================================================================
RCS file: /vol/source/cvs/mirror/pkgsrc/pkgtools/mksandbox/files/mksandbox,v
retrieving revision 1.20
diff -u -r1.20 mksandbox
--- files/mksandbox     21 Apr 2025 21:11:41 -0000      1.20
+++ files/mksandbox     16 Dec 2025 21:07:44 -0000
@@ -181,6 +181,14 @@
        ;;
 esac

+for vardir in /var/db /var/lib /var/adm /usr/adm; do
+    if test -d "$vardir"; then
+       sandboxEmptyDirs="$sandboxEmptyDirs $vardir"
+        break
+    fi
+done
+
+
 while [ $# -gt 0 ]; do
        case "$1" in
        --mounthost=*)          mounthost=`echo $1 | $sedprog -e 
's|^--mounthost=||'` ;;