Module io 

I/O operations.

If you’re looking for SeekFrom, it’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.

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.

pread

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.

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.

read

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.