2 files changed, 70 insertions, 1 deletions
diff --git a/src/utils/bios.py b/src/utils/bios.py
new file mode 100644
index 0000000..e064ca0
--- /dev/null
+++ b/src/utils/bios.py
@@ -0,0 +1,53 @@
+#
+# Copyright (C) 2023 Soleta Networks <info@soleta.eu>
+#
+# This program is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+import logging
+import os
+
+
+def get_grub_boot_params(mountpoint, device):
+    grub_conf = f'{mountpoint}/etc/default/grub'
+    res = []
+
+    with open(grub_conf, 'r') as f:
+        for line in f:
+            if line.find('=') == -1:
+                continue
+            key, value = line.split('=', 1)
+            if key == 'GRUB_CMDLINE_LINUX' or key == 'GRUB_CMDLINE_LINUE_DEFAULT':
+                value = value.replace('\n', '')
+                value = value.strip('"')
+                res.append(value)
+    res.append(f'root={device}')
+    return " ".join(res)
+
+def get_vmlinuz_path(mountpoint):
+    linuz_dir = os.path.join(mountpoint, 'boot')
+    target_file = None
+
+    for file in sorted(os.listdir(linuz_dir)):
+        if file.startswith('vmlinuz-'):
+            target_file = file
+
+    if not target_file:
+        raise FileNotFoundError('vmlinuz not found in {initrd_dir}')
+
+    return os.path.join(linuz_dir, target_file)
+
+def get_initrd_path(mountpoint):
+    initrd_dir = os.path.join(mountpoint, 'boot')
+    target_file = None
+
+    for file in sorted(os.listdir(initrd_dir)):
+        if file.startswith('initrd.img-') or file.startswith('initramfs-') and file.endswith('.img'):
+            target_file = file
+
+    if not target_file:
+        raise FileNotFoundError('initrd not found in {initrd_dir}')
+
+    return os.path.join(initrd_dir, target_file)
diff --git a/src/utils/boot.py b/src/utils/boot.py
index 07a29ba..724fc06 100644
--- a/src/utils/boot.py
+++ b/src/utils/boot.py
@@ -14,6 +14,7 @@ import subprocess
 
 from src.utils.probe import OSFamily, get_os_family, get_linux_distro_id, os_probe
 from src.utils.disk import get_partition_device, get_efi_partition
+from src.utils.bios import *
 from src.utils.uefi import *
 from src.utils.fs import *
 
@@ -27,7 +28,22 @@ def _boot_bios_linux(disk, part, mountpoint):
     if not get_linux_distro_id(mountpoint) == 'ubuntu':
         raise NotImplementedError(f'{os_probe(mountpoint)} detected, only Ubuntu is supported for legacy BIOS boot')
 
-    _boot_bios_legacy(disk, part, mountpoint)
+    kernel_path = get_vmlinuz_path(mountpoint)
+    initrd_path = get_initrd_path(mountpoint)
+
+    device = get_partition_device(disk, part)
+    grub_boot_params = get_grub_boot_params(mountpoint, device)
+
+    kexec_cmd = f'kexec -l {kernel_path} --append="{grub_boot_params}" --initrd="{initrd_path}"'
+    kexec_reboot_cmd = 'kexec -e'
+
+    logging.info(f'Booting with: {kexec_cmd}')
+    try:
+        subprocess.run(shlex.split(kexec_cmd), check=True, text=True)
+        subprocess.run(shlex.split(kexec_reboot_cmd), check=True, text=True)
+    except subprocess.CalledProcessError as e:
+        logging.error(f'Error processing kexec: {e}')
+        raise e
 
 def _boot_bios_windows(disk, part, mountpoint):
     logging.info(f'Booting Windows system')