def ListEntries(image_fname, entry_paths):
"""List the entries in an image
This decodes the supplied image and displays a table of entries from that
image, preceded by a header.
Args:
image_fname: Image filename to process
entry_paths: List of wildcarded paths (e.g. ['*dtb*', 'u-boot*',
'section/u-boot'])
"""
image = Image.FromFile(image_fname)
entries, lines, widths = image.GetListEntries(entry_paths)
num_columns = len(widths)
for linenum, line in enumerate(lines):
if linenum == 1:
# Print header line
print('-' * (sum(widths) + num_columns * 2))
out = ''
for i, item in enumerate(line):
width = -widths[i]
if item.startswith('>'):
width = -width
item = item[1:]
txt = '%*s ' % (width, item)
out += txt
print(out.rstrip())
def WriteEntry(image_fname,
entry_path,
data,
do_compress=True,
allow_resize=True,
write_map=False):
"""Replace an entry in an image
This replaces the data in a particular entry in an image. This size of the
new data must match the size of the old data unless allow_resize is True.
Args:
image_fname: Image filename to process
entry_path: Path to entry to extract
data: Data to replace with
do_compress: True to compress the data if needed, False if data is
already compressed so should be used as is
allow_resize: True to allow entries to change size (this does a re-pack
of the entries), False to raise an exception
write_map: True to write a map file
Returns:
Image object that was updated
"""
tout.Info("Write entry '%s', file '%s'" % (entry_path, image_fname))
image = Image.FromFile(image_fname)
entry = image.FindEntryPath(entry_path)
WriteEntryToImage(image,
entry,
data,
do_compress=do_compress,
allow_resize=allow_resize,
write_map=write_map)
return image
def ExtractEntries(image_fname,
output_fname,
outdir,
entry_paths,
decomp=True):
"""Extract the data from one or more entries and write it to files
Args:
image_fname: Image filename to process
output_fname: Single output filename to use if extracting one file, None
otherwise
outdir: Output directory to use (for any number of files), else None
entry_paths: List of entry paths to extract
decomp: True to decompress the entry data
Returns:
List of EntryInfo records that were written
"""
image = Image.FromFile(image_fname)
# Output an entry to a single file, as a special case
if output_fname:
if not entry_paths:
raise ValueError('Must specify an entry path to write with -f')
if len(entry_paths) != 1:
raise ValueError(
'Must specify exactly one entry path to write with -f')
entry = image.FindEntryPath(entry_paths[0])
data = entry.ReadData(decomp)
tools.WriteFile(output_fname, data)
tout.Notice("Wrote %#x bytes to file '%s'" % (len(data), output_fname))
return
# Otherwise we will output to a path given by the entry path of each entry.
# This means that entries will appear in subdirectories if they are part of
# a sub-section.
einfos = image.GetListEntries(entry_paths)[0]
tout.Notice('%d entries match and will be written' % len(einfos))
for einfo in einfos:
entry = einfo.entry
data = entry.ReadData(decomp)
path = entry.GetPath()[1:]
fname = os.path.join(outdir, path)
# If this entry has children, create a directory for it and put its
# data in a file called 'root' in that directory
if entry.GetEntries():
if not os.path.exists(fname):
os.makedirs(fname)
fname = os.path.join(fname, 'root')
tout.Notice("Write entry '%s' to '%s'" % (entry.GetPath(), fname))
tools.WriteFile(fname, data)
return einfos
def ReadEntry(image_fname, entry_path, decomp=True):
"""Extract an entry from an image
This extracts the data from a particular entry in an image
Args:
image_fname: Image filename to process
entry_path: Path to entry to extract
decomp: True to return uncompressed data, if the data is compress
False to return the raw data
Returns:
data extracted from the entry
"""
image = Image.FromFile(image_fname)
entry = image.FindEntryPath(entry_path)
return entry.ReadData(decomp)
def ReplaceEntries(image_fname,
input_fname,
indir,
entry_paths,
do_compress=True,
allow_resize=True,
write_map=False):
"""Replace the data from one or more entries from input files
Args:
image_fname: Image filename to process
input_fname: Single input ilename to use if replacing one file, None
otherwise
indir: Input directory to use (for any number of files), else None
entry_paths: List of entry paths to extract
do_compress: True if the input data is uncompressed and may need to be
compressed if the entry requires it, False if the data is already
compressed.
write_map: True to write a map file
Returns:
List of EntryInfo records that were written
"""
image = Image.FromFile(image_fname)
# Replace an entry from a single file, as a special case
if input_fname:
if not entry_paths:
raise ValueError('Must specify an entry path to read with -f')
if len(entry_paths) != 1:
raise ValueError(
'Must specify exactly one entry path to write with -f')
entry = image.FindEntryPath(entry_paths[0])
data = tools.ReadFile(input_fname)
tout.Notice("Read %#x bytes from file '%s'" % (len(data), input_fname))
WriteEntryToImage(image,
entry,
data,
do_compress=do_compress,
allow_resize=allow_resize,
write_map=write_map)
return
# Otherwise we will input from a path given by the entry path of each entry.
# This means that files must appear in subdirectories if they are part of
# a sub-section.
einfos = image.GetListEntries(entry_paths)[0]
tout.Notice("Replacing %d matching entries in image '%s'" %
(len(einfos), image_fname))
BeforeReplace(image, allow_resize)
for einfo in einfos:
entry = einfo.entry
if entry.GetEntries():
tout.Info("Skipping section entry '%s'" % entry.GetPath())
continue
path = entry.GetPath()[1:]
fname = os.path.join(indir, path)
if os.path.exists(fname):
tout.Notice("Write entry '%s' from file '%s'" %
(entry.GetPath(), fname))
data = tools.ReadFile(fname)
ReplaceOneEntry(image, entry, data, do_compress, allow_resize)
else:
tout.Warning("Skipping entry '%s' from missing file '%s'" %
(entry.GetPath(), fname))
AfterReplace(image, allow_resize=allow_resize, write_map=write_map)
return image
