def cmd_add_header_ext(fd, magic, data):
try:
magic = int(magic, 0)
except ValueError:
print("'%s' is not a valid magic number" % magic)
sys.exit(1)
h = QcowHeader(fd)
h.extensions.append(QcowHeaderExtension.create(magic,
data.encode('ascii')))
h.update(fd)
def cmd_set_header(fd, name, value):
try:
value = int(value, 0)
except ValueError:
print("'%s' is not a valid number" % value)
sys.exit(1)
fields = (field[2] for field in QcowHeader.fields)
if name not in fields:
print("'%s' is not a known header field" % name)
sys.exit(1)
h = QcowHeader(fd)
h.__dict__[name] = value
h.update(fd)
def cmd_del_header_ext(fd, magic):
try:
magic = int(magic, 0)
except ValueError:
print("'%s' is not a valid magic number" % magic)
sys.exit(1)
h = QcowHeader(fd)
found = False
for ex in h.extensions:
if ex.magic == magic:
found = True
h.extensions.remove(ex)
if not found:
print("No such header extension")
return
h.update(fd)
def cmd_set_feature_bit(fd, group, bit):
try:
bit = int(bit, 0)
if bit < 0 or bit >= 64:
raise ValueError
except ValueError:
print("'%s' is not a valid bit number in range [0, 64)" % bit)
sys.exit(1)
h = QcowHeader(fd)
if group == 'incompatible':
h.incompatible_features |= 1 << bit
elif group == 'compatible':
h.compatible_features |= 1 << bit
elif group == 'autoclear':
h.autoclear_features |= 1 << bit
else:
print("'%s' is not a valid group, try "
"'incompatible', 'compatible', or 'autoclear'" % group)
sys.exit(1)
h.update(fd)