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dump_file: Switch from "stat" to "ls" for getting filesize - recent firmware prevents using "stat", "ls" however is supported on old and new firmware.

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tuxuser 2017-11-25 23:43:22 +01:00
parent 8a5b0b9cbc
commit 47b3f41f5d
1 changed files with 13 additions and 6 deletions
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19
dump-file.py
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@ -15,14 +15,21 @@ def read_uint32(data, offset):
return struct.unpack_from('<I', data, offset)[0] return struct.unpack_from('<I', data, offset)[0]
def get_file_size(comm, path): def get_file_size(comm, path):
shell_command = b'stat -t ' + path.encode('utf8') + b'\0' shell_command = b'ls -ld ' + path.encode('utf8') + b'\0'
output = comm.call(lglaf.make_request(b'EXEC', body=shell_command))[1] output = comm.call(lglaf.make_request(b'EXEC', body=shell_command))[1]
output = output.decode('utf8') output = output.decode('utf8')
if not output.startswith(path + ' '): if not len(output):
_logger.debug("Output: %r", output) raise RuntimeError("Cannot find file %s" % path)
raise RuntimeError("Cannot get filesize for %s" % path) # Example output: "-rwxr-x--- root root 496888 1970-01-01 00:00 lafd"
size_bytes = output.lstrip(path + ' ').split()[0] # Accommodate for varying ls output
return int(size_bytes) fields = output.split()
if len(fields) >= 7:
for field in fields[3:]:
if field.isdigit():
return int(field)
_logger.debug("ls output: %s", output)
raise RuntimeError("Cannot find filesize for path %s" % path)
@contextmanager @contextmanager
def laf_open_ro(comm, filename): def laf_open_ro(comm, filename):