Python ftruncate_syscall примеры использования

Пример #1

Файл: lind_fuse.py Проект: uditabose/Collectibles

 def ftruncate(self, len):
     try:
         trunc = lind.ftruncate_syscall(self.fd, len)
     except lind.SyscallError, e:
         return -errno[e[1]]

Пример #2

 def ftruncate(self, len):
     try:
         trunc = lind.ftruncate_syscall(self.fd, len)
     except lind.SyscallError, e:
         return -errno[e[1]]

Пример #3

Файл: ut_lind_fs_truncate.py Проект: Ashmita89/attic

from lind_fs_constants import *

lind_test_server._blank_fs_init()

fd = lind_test_server.open_syscall('/foo', O_CREAT | O_EXCL | O_RDWR, S_IRWXA)

# Make a big file
msg = "Hello" * 100
size = len(msg)

# how small will we make the file
TRUNCATE_SIZE = 10
NEW_TRUNCATE_SIZE = 200
lind_test_server.write_syscall(fd, msg)

lind_test_server.ftruncate_syscall(fd, TRUNCATE_SIZE)

# seek to the beginning...
assert(lind_test_server.lseek_syscall(fd, 0, SEEK_SET) == 0)


data = lind_test_server.read_syscall(fd, 100)

assert len(data) == TRUNCATE_SIZE, "File must be smaller after truncate"

assert data == msg[:TRUNCATE_SIZE], "New files contents must match: \n%s\n%s" \
       % (data, msg[:TRUNCATE_SIZE])

lind_test_server.ftruncate_syscall(fd, NEW_TRUNCATE_SIZE)

# seek to the beginning...

Пример #4

from lind_fs_constants import *

lind_test_server._blank_fs_init()

fd = lind_test_server.open_syscall('/foo', O_CREAT | O_EXCL | O_RDWR, S_IRWXA)

# Make a big file
msg = "Hello" * 100
size = len(msg)

# how small will we make the file
TRUNCATE_SIZE = 10
NEW_TRUNCATE_SIZE = 200
lind_test_server.write_syscall(fd, msg)

lind_test_server.ftruncate_syscall(fd, TRUNCATE_SIZE)

# seek to the beginning...
assert (lind_test_server.lseek_syscall(fd, 0, SEEK_SET) == 0)

data = lind_test_server.read_syscall(fd, 100)

assert len(data) == TRUNCATE_SIZE, "File must be smaller after truncate"

assert data == msg[:TRUNCATE_SIZE], "New files contents must match: \n%s\n%s" \
       % (data, msg[:TRUNCATE_SIZE])

lind_test_server.ftruncate_syscall(fd, NEW_TRUNCATE_SIZE)

# seek to the beginning...
assert (lind_test_server.lseek_syscall(fd, 0, SEEK_SET) == 0)