Module io

I/O operations.

If you’re looking for SeekFrom, that’s in the fs module.

Structs

• DupFlags
  O_* constants for use with dup2.
• Errno
  errno—An error code.
• FdFlags
  FD_* constants for use with fcntl_getfd and fcntl_setfd.
• IoSlice
  A buffer type used with Write::write_vectored.
• IoSliceMut
  A buffer type used with Read::read_vectored.
• ReadWriteFlags
  RWF_* constants for use with preadv2 and pwritev2.

Functions

• close^⚠
  close(raw_fd)—Closes a RawFd directly.
• dup
  dup(fd)—Creates a new OwnedFd instance that shares the same underlying file description as fd.
• dup2
  dup2(fd, new)—Changes the file description of a file descriptor.
• dup3
  dup3(fd, new, flags)—Changes the file description of a file descriptor, with flags.
• fcntl_dupfd_cloexec
  fcntl(fd, F_DUPFD_CLOEXEC)—Creates a new OwnedFd instance, with value at least min, that has O_CLOEXEC set and that shares the same underlying file description as fd.
• fcntl_getfd
  fcntl(fd, F_GETFD)—Returns a file descriptor’s flags.
• fcntl_setfd
  fcntl(fd, F_SETFD, flags)—Sets a file descriptor’s flags.
• ioctl_fionbio
  ioctl(fd, FIONBIO, &value)—Enables or disables non-blocking mode.
• ioctl_fionread
  ioctl(fd, FIONREAD)—Returns the number of bytes ready to be read.
• is_read_write
  Returns a pair of booleans indicating whether the file descriptor is readable and/or writable, respectively.
• pread
  pread(fd, buf, offset)—Reads from a file at a given position.
• pread_uninit
  pread(fd, buf, offset)—Reads from a file at a given position.
• preadv
  preadv(fd, bufs, offset)—Reads from a file at a given position into multiple buffers.
• preadv2
  preadv2(fd, bufs, offset, flags)—Reads data, with several options.
• pwrite
  pwrite(fd, bufs)—Writes to a file at a given position.
• pwritev
  pwritev(fd, bufs, offset)—Writes to a file at a given position from multiple buffers.
• pwritev2
  pwritev2(fd, bufs, offset, flags)—Writes data, with several options.
• read
  read(fd, buf)—Reads from a stream.
• read_uninit
  read(fd, buf)—Reads from a stream.
• readv
  readv(fd, bufs)—Reads from a stream into multiple buffers.
• retry_on_intr
  Call f until it either succeeds or fails other than Errno::INTR.
• write
  write(fd, buf)—Writes to a stream.
• writev
  writev(fd, bufs)—Writes to a stream from multiple buffers.

Type Aliases

• Result
  A specialized Result type for rustix APIs.