TermiNexus
d6d07b25ee
内核：SEEK 补真正的 whence（0=SET 1=CUR 2=END，END 时 offset 为距末尾的距离，offset>size 返回 -1）；删除 TELL/SIZE 的枚举项、派发分支与 TELL/fsize 函数（fat32.tell/size 仍留给 SEEK 内部用）。 SDK：vpsdk/fs.vp 的 seek() 增加 whence 参数（默认 0，调用方不变）；tell() 改为 lseek(fd,0,SEEK_CUR)；fsize() 改为三次 lseek 往返（记住位置 → 跳末尾取大小 → 复位），不改变最终位置。 私有段只剩 5 项：OPENDIR/READDIR/CLOSEDIR（openat+getdents64）与 LOAD_SO/SO_CALL1（动态库加载下沉）。
150 lines
4.9 KiB
Plaintext
150 lines
4.9 KiB
Plaintext
from . import syscall as syscall
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define O_RDONLY = 0x01
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define O_WRONLY = 0x02
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define O_RDWR = 0x03
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define O_CREAT = 0x04
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define O_TRUNC = 0x08
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define O_APPEND = 0x30
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define SEEK_SET = 0
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define SEEK_CUR = 1
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define SEEK_END = 2
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define DT_UNKNOWN = 0
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define DT_FILE = 1
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define DT_DIR = 2
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def open(path: const str, flags: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.OPEN), uint64(path), uint64(flags), 0))
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def close(fd: int) -> int:
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return int(syscall._syscall1(uint64(syscall.Syscall.CLOSE), uint64(fd)))
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def read(fd: int, buf: rawptr, count: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.READ), uint64(fd), uint64(buf), uint64(count)))
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def write(fd: int, buf: rawptr, count: uint32) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.WRITE), uint64(fd), uint64(buf), uint64(count)))
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def seek(fd: int, offset: uint32, whence: uint32 = 0) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), uint64(offset), uint64(whence)))
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def tell(fd: int) -> uint32:
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"""当前位置 = lseek(fd, 0, SEEK_CUR)（TELL 私有 syscall 已删除）。"""
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return uint32(syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), 0, uint64(SEEK_CUR)))
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def fsize(fd: int) -> uint32:
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"""文件大小：SIZE 私有 syscall 已删除，改用 lseek 往返（不改变最终位置）。
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三次 lseek：记住当前位置 → 跳到末尾拿到大小 → 复位。多两次 syscall，换掉一个私有号。
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"""
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cur: uint32 = uint32(syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), 0, uint64(SEEK_CUR)))
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end: uint32 = uint32(syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), 0, uint64(SEEK_END)))
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syscall._syscall3(uint64(syscall.Syscall.SEEK), uint64(fd), uint64(cur), uint64(SEEK_SET))
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return end
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def mkdir(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.MKDIR), uint64(path), 0, 0))
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def remove(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.REMOVE), uint64(path), 0, 0))
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def opendir(path: const str) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.OPENDIR), uint64(path), 0, 0))
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def readdir(dd: int, info: rawptr) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.READDIR), uint64(dd), uint64(info), 0))
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def closedir(dd: int) -> int:
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return int(syscall._syscall1(uint64(syscall.Syscall.CLOSEDIR), uint64(dd)))
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def stat(path: const str, info: rawptr) -> int:
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return int(syscall._syscall3(uint64(syscall.Syscall.STAT), uint64(path), uint64(info), 0))
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def ioctl(fd: int, request: uint32, arg: rawptr) -> int:
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"""设备控制（Linux ioctl 子集）。当前只有 devfs 设备（如 /dev/fb0）实现了它。"""
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return int(syscall._syscall3(uint64(syscall.Syscall.IOCTL), uint64(fd), uint64(request), uint64(arg)))
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class FileIO:
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_fd: int
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_pos: uint32
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_size: uint32
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_flags: uint32
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_closed: int
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def __init__(self, fd: int, flags: uint32):
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self._fd = fd
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self._flags = flags
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self._pos = 0
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self._size = fsize(fd)
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self._closed = 0
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def read(self, buf: rawptr, count: uint32) -> int:
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if self._closed: return -1
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n: int = read(self._fd, buf, count)
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if n > 0:
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self._pos = self._pos + uint32(n)
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return n
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def write(self, buf: rawptr, count: uint32) -> int:
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if self._closed: return -1
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n: int = write(self._fd, buf, count)
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if n > 0:
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self._pos = self._pos + uint32(n)
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if self._pos > self._size:
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self._size = self._pos
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return n
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def seek(self, offset: uint32) -> int:
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if self._closed: return -1
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res: int = seek(self._fd, offset)
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if res == 0:
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self._pos = offset
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return res
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def tell(self) -> uint32:
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return self._pos
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def size(self) -> uint32:
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return self._size
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def close(self) -> int:
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if self._closed: return 0
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self._closed = 1
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return close(self._fd)
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def is_closed(self) -> int:
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return self._closed
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class DirIO:
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_dd: int
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_closed: int
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def __init__(self, dd: int):
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self._dd = dd
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self._closed = 0
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def read(self, info: rawptr) -> int:
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if self._closed: return -1
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return readdir(self._dd, info)
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def close(self) -> int:
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if self._closed: return 0
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self._closed = 1
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return closedir(self._dd)
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def is_closed(self) -> int:
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return self._closed
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def open_file(path: const str, flags: uint32) -> FileIO:
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fd: int = open(path, flags)
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if fd < 0: return None
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return FileIO(fd, flags)
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def open_dir(path: const str) -> DirIO:
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dd: int = opendir(path)
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if dd < 0: return None
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return DirIO(dd)
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