Module stdio 

Available on crate feature stdio only.

Functions returning the stdio file descriptors.

Safety

Some of the functions in this module can cause the process’ stdio file descriptors to be closed, which breaks the assumption made in Rust’s std that these file descriptors are always open.

And in no-std mode, some of the functions in this module similarly assume that the process’ stdio file descriptors are open, which we don’t take as given in no-std mode because we don’t have std also making that assumption.

See the individual functions’ safety comments for more details.

Functions

dup2_stderrNeither Windows nor WASI

Utility function to safely dup2 over stderr (fd 2).

dup2_stdinNeither Windows nor WASI

Utility function to safely dup2 over stdin (fd 0).

dup2_stdoutNeither Windows nor WASI

Utility function to safely dup2 over stdout (fd 1).

raw_stderr

STDERR_FILENO—Standard error, raw.

raw_stdin

STDIN_FILENO—Standard input, raw.

raw_stdout

STDOUT_FILENO—Standard output, raw.

stderrstd

STDERR_FILENO—Standard error, borrowed.

stdinstd

STDIN_FILENO—Standard input, borrowed.

stdoutstd

STDOUT_FILENO—Standard output, borrowed.

take_stderr^⚠

STDERR_FILENO—Standard error, owned.

take_stdin^⚠

STDIN_FILENO—Standard input, owned.

take_stdout^⚠

STDOUT_FILENO—Standard output, owned.