def ql_syscall_faccessat(ql: Qiling, dfd: int, filename: int, mode: int):
access_path = ql.os.utils.read_cstring(filename)
real_path = ql.os.path.transform_to_real_path(access_path)
if not os.path.exists(real_path):
regreturn = -1
elif stat.S_ISFIFO(Stat(real_path).st_mode):
regreturn = 0
else:
regreturn = -1
if regreturn == -1:
ql.log.debug(f'File not found or skipped: {access_path}')
else:
ql.log.debug(f'File found: {access_path}')
return regreturn
def ql_syscall_newfstatat(ql: Qiling, dirfd: int, path: int, buf_ptr: int,
flag: int):
# FIXME: dirfd(relative path) not implement.
file_path = ql.os.utils.read_cstring(path)
real_path = ql.os.path.transform_to_real_path(file_path)
relative_path = ql.os.path.transform_to_relative_path(file_path)
if os.path.exists(real_path):
buf = pack_stat_struct(ql, Stat(real_path))
ql.mem.write(buf_ptr, buf)
regreturn = 0
else:
regreturn = -1
ql.log.debug(
f'Directory {"found" if regreturn == 0 else "not found"}: {relative_path}'
)
return regreturn
def ql_syscall_ftruncate(ql: Qiling, fd: int, length: int):
real_path = ql.os.fd[fd].name
st_size = Stat(real_path).st_size
try:
if st_size >= length:
os.truncate(real_path, length)
else:
padding = length - st_size
with open(real_path, 'a+b') as ofile:
ofile.write(b'\x00' * padding)
except:
regreturn = -1
else:
regreturn = 0
ql.log.debug("ftruncate(%d, 0x%x) = %d" % (fd, length, regreturn))
return regreturn
def ql_syscall_truncate(ql: Qiling, path: int, length: int):
file_path = ql.os.utils.read_cstring(path)
real_path = ql.os.path.transform_to_real_path(file_path)
st_size = Stat(real_path).st_size
try:
if st_size >= length:
os.truncate(real_path, length)
else:
padding = length - st_size
with open(real_path, 'a+b') as ofile:
ofile.write(b'\x00' * padding)
except:
regreturn = -1
else:
regreturn = 0
ql.log.debug('truncate(%s, 0x%x) = %d' % (file_path, length, regreturn))
return regreturn