From 68e1eb53827acb4a29d244a30345449294e032c7 Mon Sep 17 00:00:00 2001
From: Jeremy Fleischman <jeremyfleischman@gmail.com>
Date: Wed, 15 Oct 2025 19:43:57 -0400
Subject: [PATCH] fix: don't crash if public dir does not exist

On my machine, I do not have a `~/Public` directory, which causes
quickqemu to spit out a warning and then crash:

```console
$ quickemu --vm vm.conf
 - WARNING! Public directory: '/home/jeremy/Public' doesn't exist!
Quickemu 4.9.7 using /nix/store/nk59c14nwf79bafmrsnnhndmpnrlplrv-qemu-10.1.0/bin/qemu-system-x86_64 v10.1.0
...
 - 9P:       On guest: sudo mount -t 9p -o trans=virtio,version=9p2000.L,msize=104857600  ~/Public
...
 - Process:  ERROR! Failed to start /nix/store/va3md6gv82fqf7pxbfxd0cd5gfnmnz9f-vm.conf as va3md6gv82fqf7pxbfxd0cd5gfnmnz9f-vm

qemu-system-x86_64: -netdev user,hostname=va3md6gv82fqf7pxbfxd0cd5gfnmnz9f-vm,hostfwd=tcp::22220-:22,smb=/home/jeremy/Public,id=nic: Error accessing shared directory '/home/jeremy/Public': No such file or directory
```

Here's my `vm.conf`. Note how I'm not asking for a public dir:

```
iso="/nix/store/q3j8357dz3kmyjv84wfj4pyn20b65h9l-nixos-minimal-25.11pre-git-x86_64-linux.iso/iso/nixos-minimal-25.11pre-git-x86_64-linux.iso"
```
---
 quickemu | 1 +
 1 file changed, 1 insertion(+)

diff --git a/quickemu b/quickemu
index caa8454..09581fa 100755
--- a/quickemu
+++ b/quickemu
@@ -1823,6 +1823,7 @@ function fileshare_param_check() {
 
         if [ ! -d "${PUBLIC}" ]; then
             echo " - WARNING! Public directory: '${PUBLIC}' doesn't exist!"
+            PUBLIC=""
         else
             PUBLIC_TAG="Public-${USER,,}"
             PUBLIC_PERMS=$(${STAT}  -c "%A" "${PUBLIC}")