1 files changed, 6 insertions, 0 deletions
diff --git a/src/ninep/pty.zig b/src/ninep/pty.zig
index 68f98554..aa0f499a 100644
--- a/src/ninep/pty.zig
+++ b/src/ninep/pty.zig
@@ -61,6 +61,12 @@ pub fn writeCtl(p: *Pardes, req: Req, id: usize) Reply {
         while (it.next()) |raw| {
             const line = std.mem.trim(u8, raw, " \t\r");
             if (line.len == 0) continue;
+            // A shell restarted where the directory is gone would not start:
+            // refused before anything runs, as Tty there is.
+            if (!apply and std.mem.eql(u8, line, "exec")) if (p.panes[id]) |pane| if (pardes.exec.missingDir(p, pane.cwdSlice())) {
+                const dir = pane.cwdSlice();
+                return tree.failText(req.tag, E.NOENT, std.fmt.bufPrint(&p.fs.ename, "exec: {s}: no such directory", .{dir[0..@min(dir.len, 256)]}) catch "exec: no such directory");
+            };
             if (!verb(p, id, line, apply)) return tree.failText(req.tag, E.INVAL, if (outOfRange(line)) e_winsize_range else e_bad_pty_ctl);
         }
     }