id = 2405
title = "Qemu on Windows fails to parse absolute file path in -acpitable switch"
state = "opened"
created_at = "2024-06-23T19:14:23.223Z"
closed_at = "n/a"
labels = ["ACPI", "host: x86", "hostos: Windows", "kind::Bug"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2405"
host-os = "Windows 11 23H2"
host-arch = "x64"
qemu-version = "v9.0.0-12054-g923cf646f4"
guest-os = "no matter"
guest-arch = "no matter"
description = """I expect qemu-system-x86_64.exe to navigate to the path provided with -acpitable switch and to try to parse it. Instead, Qemu prints: "can't open file C: No such file or directory" if provided with absolute path. Qemu thinks "C:" itself is a file with acpi table.

However, Qemu correctly processes files with relative path. If I run this command to try to parse file COPYING bundled in default qemu build:

`qemu-system-x86_64.exe -acpitable "file=copying"`

Qemu says: `qemu-system-x86_64.exe: -acpitable file=copying: warning: ACPI table has wrong length, header says 1313284128, actual size 17992 bytes`

Then it proceeds to boot BIOS, as usual."""
reproduce = """1. Run `qemu-system-x86_64.exe -acpitable "file=C:\\temp\\temp.txt"`
2. Experience "can't open file C: No such file or directory" error message returning you to the command prompt. No BIOS screen.
3. Run `qemu-system-x86_64.exe -acpitable "file=copying"` 
4. Experience insignificant warning and then a normal BIOS screen."""
additional = "n/a"