265 lines
7.9 KiB
Python
265 lines
7.9 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
|
||
|
|
import sys
|
||
|
|
import os
|
||
|
|
|
||
|
|
import struct
|
||
|
|
from collections import namedtuple
|
||
|
|
import StringIO
|
||
|
|
|
||
|
|
import argparse
|
||
|
|
parser = argparse.ArgumentParser()
|
||
|
|
parser.add_argument('rootdir', type=str, help='the path to rootfs')
|
||
|
|
parser.add_argument('output', type=argparse.FileType('wb'), nargs='?', help='output file name')
|
||
|
|
parser.add_argument('--dump', action='store_true', help='dump the fs hierarchy')
|
||
|
|
parser.add_argument('--binary', action='store_true', help='output binary file')
|
||
|
|
parser.add_argument('--addr', default='0', help='set the base address of the binary file, default to 0.')
|
||
|
|
|
||
|
|
class File(object):
|
||
|
|
def __init__(self, name):
|
||
|
|
self._name = name
|
||
|
|
self._data = open(name, 'rb').read()
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
return self._name
|
||
|
|
|
||
|
|
@property
|
||
|
|
def c_name(self):
|
||
|
|
return '_' + self._name.replace('.', '_')
|
||
|
|
|
||
|
|
@property
|
||
|
|
def bin_name(self):
|
||
|
|
# Pad to 4 bytes boundary with \0
|
||
|
|
pad_len = 4
|
||
|
|
bn = self._name + '\0' * (pad_len - len(self._name) % pad_len)
|
||
|
|
return bn
|
||
|
|
|
||
|
|
def c_data(self, prefix=''):
|
||
|
|
'''Get the C code represent of the file content.'''
|
||
|
|
head = 'static const rt_uint8_t %s[] = {\n' % \
|
||
|
|
(prefix + self.c_name)
|
||
|
|
tail = '\n};'
|
||
|
|
|
||
|
|
if self.entry_size == 0:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
return head + ','.join(('0x%02x' % ord(i) for i in self._data)) + tail
|
||
|
|
|
||
|
|
@property
|
||
|
|
def entry_size(self):
|
||
|
|
return len(self._data)
|
||
|
|
|
||
|
|
def bin_data(self, base_addr=0x0):
|
||
|
|
return bytes(self._data)
|
||
|
|
|
||
|
|
def dump(self, indent=0):
|
||
|
|
print('%s%s' % (' ' * indent, self._name))
|
||
|
|
|
||
|
|
class Folder(object):
|
||
|
|
bin_fmt = struct.Struct('IIII')
|
||
|
|
bin_item = namedtuple('dirent', 'type, name, data, size')
|
||
|
|
|
||
|
|
def __init__(self, name):
|
||
|
|
self._name = name
|
||
|
|
self._children = []
|
||
|
|
|
||
|
|
@property
|
||
|
|
def name(self):
|
||
|
|
return self._name
|
||
|
|
|
||
|
|
@property
|
||
|
|
def c_name(self):
|
||
|
|
# add _ to avoid conflict with C key words.
|
||
|
|
return '_' + self._name
|
||
|
|
|
||
|
|
@property
|
||
|
|
def bin_name(self):
|
||
|
|
# Pad to 4 bytes boundary with \0
|
||
|
|
pad_len = 4
|
||
|
|
bn = self._name + '\0' * (pad_len - len(self._name) % pad_len)
|
||
|
|
return bn
|
||
|
|
|
||
|
|
def walk(self):
|
||
|
|
# os.listdir will return unicode list if the argument is unicode.
|
||
|
|
# TODO: take care of the unicode names
|
||
|
|
for ent in os.listdir(u'.'):
|
||
|
|
if os.path.isdir(ent):
|
||
|
|
cwd = os.getcwdu()
|
||
|
|
d = Folder(ent)
|
||
|
|
# depth-first
|
||
|
|
os.chdir(os.path.join(cwd, ent))
|
||
|
|
d.walk()
|
||
|
|
# restore the cwd
|
||
|
|
os.chdir(cwd)
|
||
|
|
self._children.append(d)
|
||
|
|
else:
|
||
|
|
self._children.append(File(ent))
|
||
|
|
|
||
|
|
def sort(self):
|
||
|
|
def _sort(x, y):
|
||
|
|
if x.name == y.name:
|
||
|
|
return 0
|
||
|
|
elif x.name > y.name:
|
||
|
|
return 1
|
||
|
|
else:
|
||
|
|
return -1
|
||
|
|
self._children.sort(cmp=_sort)
|
||
|
|
|
||
|
|
# sort recursively
|
||
|
|
for c in self._children:
|
||
|
|
if isinstance(c, Folder):
|
||
|
|
c.sort()
|
||
|
|
|
||
|
|
def dump(self, indent=0):
|
||
|
|
print('%s%s' % (' ' * indent, self._name))
|
||
|
|
for c in self._children:
|
||
|
|
c.dump(indent + 1)
|
||
|
|
|
||
|
|
def c_data(self, prefix=''):
|
||
|
|
'''get the C code represent of the folder.
|
||
|
|
|
||
|
|
It is recursive.'''
|
||
|
|
# make the current dirent
|
||
|
|
# static is good. Only root dirent is global visible.
|
||
|
|
if self.entry_size == 0:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
dhead = 'static const struct romfs_dirent %s[] = {\n' % (prefix + self.c_name)
|
||
|
|
dtail = '\n};'
|
||
|
|
body_fmt = ' {{{type}, "{name}", (rt_uint8_t *){data}, sizeof({data})/sizeof({data}[0])}}'
|
||
|
|
body_fmt0= ' {{{type}, "{name}", RT_NULL, 0}}'
|
||
|
|
# prefix of children
|
||
|
|
cpf = prefix+self.c_name
|
||
|
|
body_li = []
|
||
|
|
payload_li = []
|
||
|
|
for c in self._children:
|
||
|
|
entry_size = c.entry_size
|
||
|
|
if isinstance(c, File):
|
||
|
|
tp = 'ROMFS_DIRENT_FILE'
|
||
|
|
elif isinstance(c, Folder):
|
||
|
|
tp = 'ROMFS_DIRENT_DIR'
|
||
|
|
else:
|
||
|
|
assert False, 'Unkown instance:%s' % str(c)
|
||
|
|
if entry_size == 0:
|
||
|
|
body_li.append(body_fmt0.format(type=tp, name = c.name))
|
||
|
|
else:
|
||
|
|
body_li.append(body_fmt.format(type=tp,
|
||
|
|
name=c.name,
|
||
|
|
data=cpf+c.c_name))
|
||
|
|
payload_li.append(c.c_data(prefix=cpf))
|
||
|
|
|
||
|
|
# All the data we need is defined in payload so we should append the
|
||
|
|
# dirent to it. It also meet the depth-first policy in this code.
|
||
|
|
payload_li.append(dhead + ',\n'.join(body_li) + dtail)
|
||
|
|
|
||
|
|
return '\n\n'.join(payload_li)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def entry_size(self):
|
||
|
|
return len(self._children)
|
||
|
|
|
||
|
|
def bin_data(self, base_addr=0x0):
|
||
|
|
'''Return StringIO object'''
|
||
|
|
# The binary layout is different from the C code layout. We put the
|
||
|
|
# dirent before the payload in this mode. But the idea is still simple:
|
||
|
|
# Depth-First.
|
||
|
|
|
||
|
|
#{
|
||
|
|
# rt_uint32_t type;
|
||
|
|
# const char *name;
|
||
|
|
# const rt_uint8_t *data;
|
||
|
|
# rt_size_t size;
|
||
|
|
#}
|
||
|
|
d_li = []
|
||
|
|
# payload base
|
||
|
|
p_base = base_addr + self.bin_fmt.size * self.entry_size
|
||
|
|
# the length to record how many data is in
|
||
|
|
v_len = p_base
|
||
|
|
# payload
|
||
|
|
p_li = []
|
||
|
|
for c in self._children:
|
||
|
|
if isinstance(c, File):
|
||
|
|
# ROMFS_DIRENT_FILE
|
||
|
|
tp = 0
|
||
|
|
elif isinstance(c, Folder):
|
||
|
|
# ROMFS_DIRENT_DIR
|
||
|
|
tp = 1
|
||
|
|
else:
|
||
|
|
assert False, 'Unkown instance:%s' % str(c)
|
||
|
|
|
||
|
|
name = bytes(c.bin_name)
|
||
|
|
name_addr = v_len
|
||
|
|
v_len += len(name)
|
||
|
|
|
||
|
|
data = c.bin_data(base_addr=v_len)
|
||
|
|
data_addr = v_len
|
||
|
|
# pad the data to 4 bytes boundary
|
||
|
|
pad_len = 4
|
||
|
|
if len(data) % pad_len != 0:
|
||
|
|
data += '\0' * (pad_len - len(data) % pad_len)
|
||
|
|
v_len += len(data)
|
||
|
|
|
||
|
|
d_li.append(self.bin_fmt.pack(*self.bin_item(
|
||
|
|
type=tp,
|
||
|
|
name=name_addr,
|
||
|
|
data=data_addr,
|
||
|
|
size=c.entry_size)))
|
||
|
|
|
||
|
|
p_li.extend((name, data))
|
||
|
|
|
||
|
|
return bytes().join(d_li) + bytes().join(p_li)
|
||
|
|
|
||
|
|
def get_c_data(tree):
|
||
|
|
# Handle the root dirent specially.
|
||
|
|
root_dirent_fmt = '''/* Generated by mkromfs. Edit with caution. */
|
||
|
|
#include <rtthread.h>
|
||
|
|
#include <dfs_romfs.h>
|
||
|
|
|
||
|
|
{data}
|
||
|
|
|
||
|
|
const struct romfs_dirent {name} = {{
|
||
|
|
ROMFS_DIRENT_DIR, "/", (rt_uint8_t *){rootdirent}, sizeof({rootdirent})/sizeof({rootdirent}[0])
|
||
|
|
}};
|
||
|
|
'''
|
||
|
|
|
||
|
|
return root_dirent_fmt.format(name='romfs_root',
|
||
|
|
rootdirent=tree.c_name,
|
||
|
|
data=tree.c_data())
|
||
|
|
|
||
|
|
def get_bin_data(tree, base_addr):
|
||
|
|
v_len = base_addr + Folder.bin_fmt.size
|
||
|
|
name = bytes('/\0\0\0')
|
||
|
|
name_addr = v_len
|
||
|
|
v_len += len(name)
|
||
|
|
data_addr = v_len
|
||
|
|
# root entry
|
||
|
|
data = Folder.bin_fmt.pack(*Folder.bin_item(type=1,
|
||
|
|
name=name_addr,
|
||
|
|
data=data_addr,
|
||
|
|
size=tree.entry_size))
|
||
|
|
return data + name + tree.bin_data(v_len)
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
args = parser.parse_args()
|
||
|
|
|
||
|
|
os.chdir(args.rootdir)
|
||
|
|
|
||
|
|
tree = Folder('romfs_root')
|
||
|
|
tree.walk()
|
||
|
|
tree.sort()
|
||
|
|
|
||
|
|
if args.dump:
|
||
|
|
tree.dump()
|
||
|
|
|
||
|
|
if args.binary:
|
||
|
|
data = get_bin_data(tree, int(args.addr, 16))
|
||
|
|
else:
|
||
|
|
data = get_c_data(tree)
|
||
|
|
|
||
|
|
output = args.output
|
||
|
|
if not output:
|
||
|
|
output = sys.stdout
|
||
|
|
|
||
|
|
output.write(data)
|