| 32,84 → 32,105 |
|---|
| |
| import sys |
| import os |
| import struct |
| import xstruct |
| |
| def align_up(size, alignment): |
| "Align upwards to a given alignment" |
| return (((size) + ((alignment) - 1)) & ~((alignment) - 1)) |
| HEADER = """little: |
| char tag[5] /* 'TMPFS' */ |
| """ |
| |
| DENTRY_NONE = """little: |
| uint8_t kind /* NONE */ |
| uint32_t fname_len /* 0 */ |
| """ |
| |
| DENTRY_FILE = """little: |
| uint8_t kind /* FILE */ |
| uint32_t fname_len /* filename length */ |
| char fname[%d] /* filename */ |
| uint32_t flen /* file length */ |
| """ |
| |
| DENTRY_DIRECTORY = """little: |
| uint8_t kind /* DIRECTORY */ |
| uint32_t fname_len /* filename length */ |
| char fname[%d] /* filename */ |
| """ |
| |
| TMPFS_NONE = 0 |
| TMPFS_FILE = 1 |
| TMPFS_DIRECTORY = 2 |
| |
| def usage(prname): |
| "Print usage syntax" |
| print prname + " <ALIGNMENT> <PATH> <IMAGE>" |
| print prname + " <PATH> <IMAGE>" |
| |
| def recursion(root, outf): |
| "Recursive directory walk" |
| |
| payload_size = 0 |
| |
| for name in os.listdir(root): |
| canon = os.path.join(root, name) |
| |
| if (os.path.isfile(canon)): |
| outf.write(struct.pack("<BL" + ("%d" % len(name)) + "s", 1, len(name), name)) |
| payload_size += 5 + len(name) |
| size = os.path.getsize(canon) |
| rd = 0; |
| outf.write(struct.pack("<L", size)) |
| payload_size += 4 |
| |
| dentry = xstruct.create(DENTRY_FILE % len(name)) |
| dentry.kind = TMPFS_FILE |
| dentry.fname_len = len(name) |
| dentry.fname = name |
| dentry.flen = size |
| |
| outf.write(dentry.pack()) |
| |
| inf = file(canon, "r") |
| rd = 0; |
| while (rd < size): |
| data = inf.read(4096); |
| outf.write(data) |
| payload_size += len(data) |
| rd += len(data) |
| inf.close() |
| |
| if (os.path.isdir(canon)): |
| outf.write(struct.pack("<BL" + ("%d" % len(name)) + "s", 2, len(name), name)) |
| payload_size += 5 + len(name) |
| payload_size += recursion(canon, outf) |
| outf.write(struct.pack("<BL", 0, 0)) |
| payload_size += 5 |
| |
| return payload_size |
| dentry = xstruct.create(DENTRY_DIRECTORY % len(name)) |
| dentry.kind = TMPFS_DIRECTORY |
| dentry.fname_len = len(name) |
| dentry.fname = name |
| |
| outf.write(dentry.pack()) |
| |
| recursion(canon, outf) |
| |
| dentry = xstruct.create(DENTRY_NONE) |
| dentry.kind = TMPFS_NONE |
| dentry.fname_len = 0 |
| |
| outf.write(dentry.pack()) |
| |
| def main(): |
| if (len(sys.argv) < 4): |
| if (len(sys.argv) < 3): |
| usage(sys.argv[0]) |
| return |
| |
| if (not sys.argv[1].isdigit()): |
| print "<ALIGNMENT> must be a number" |
| return |
| |
| align = int(sys.argv[1], 0) |
| path = os.path.abspath(sys.argv[2]) |
| path = os.path.abspath(sys.argv[1]) |
| if (not os.path.isdir(path)): |
| print "<PATH> must be a directory" |
| return |
| |
| header_size = align_up(18, align) |
| outf = file(sys.argv[3], "w") |
| outf.write(struct.pack("<" + ("%d" % header_size) + "x")) |
| outf = file(sys.argv[2], "w") |
| |
| outf.write(struct.pack("<5s", "TMPFS")) |
| payload_size = 5 |
| header = xstruct.create(HEADER) |
| header.tag = "TMPFS" |
| |
| payload_size += recursion(path, outf) |
| |
| outf.write(struct.pack("<BL", 0, 0)) |
| payload_size += 5 |
| outf.write(header.pack()) |
| |
| aligned_size = align_up(payload_size, align) |
| recursion(path, outf) |
| |
| if (aligned_size - payload_size > 0): |
| outf.write(struct.pack("<" + ("%d" % (aligned_size - payload_size)) + "x")) |
| |
| outf.seek(0) |
| outf.write(struct.pack("<4sBBLQ", "HORD", 1, 1, header_size, aligned_size)) |
| dentry = xstruct.create(DENTRY_NONE) |
| dentry.kind = TMPFS_NONE |
| dentry.fname_len = 0 |
| |
| outf.write(dentry.pack()) |
| |
| outf.close() |
| |
| |
| if __name__ == '__main__': |
| main() |