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Create disk images without root

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`mke2fs` has a `-d` option that allows to populate the newly created filesystem without needing to temporarily mount it. That allows to use `parted` and `mkfs.ext3` on regular files without needing root access.
This commit is contained in:
Eduardo Sánchez Muñoz 2023-12-28 14:04:41 +01:00 • committed by fosslinux
parent 67aa2a4826
commit 679f73bbf1
3 changed files with 26 additions and 63 deletions
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30
lib/generator.py
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@ -59,26 +59,16 @@ class Generator():
# argument matrix ... or we could just use ext3 instead which
# is effectively universally the same
if kernel_bootstrap:
init_path = os.path.join(self.target_dir, 'init')
self.target_dir = os.path.join(self.target_dir, 'init')
os.mkdir(self.target_dir)
os.mkdir(init_path)
self.target_dir = init_path
if self.repo_path or self.external_sources:
target.add_disk("external", filesystem="ext3")
target.mount_disk("external", "external")
else:
if not self.repo_path and not self.external_sources:
self.external_dir = os.path.join(self.target_dir, 'external')
elif using_kernel:
self.target_dir = os.path.join(self.target_dir, 'disk')
target.add_disk("disk",
filesystem="ext3",
size=(str(target_size) + "M") if target_size else "16G",
bootable=True)
target.mount_disk("disk", "disk")
self.external_dir = os.path.join(self.target_dir, 'external')
os.makedirs(self.external_dir, exist_ok=True)
os.makedirs(self.external_dir)
if self.early_preseed:
# Extract tar containing preseed
@ -103,10 +93,16 @@ class Generator():
if kernel_bootstrap:
self.create_builder_hex0_disk_image(self.target_dir + '.img', target_size)
if kernel_bootstrap and (self.external_sources or self.repo_path):
target.umount_disk('external')
if self.repo_path or self.external_sources:
mkfs_args = ['-d', os.path.join(target.path, 'external')]
target.add_disk("external", filesystem="ext3", mkfs_args=mkfs_args)
elif using_kernel:
target.umount_disk('disk')
mkfs_args = ['-d', os.path.join(target.path, 'disk')]
target.add_disk("disk",
filesystem="ext3",
size=(str(target_size) + "M") if target_size else "16G",
bootable=True,
mkfs_args=mkfs_args)
def steps(self):
"""Copy in steps."""