50 lines
1.3 KiB
Markdown
50 lines
1.3 KiB
Markdown
|
# command-fds
|
||
|
|
|
||
|
|
[](https://crates.io/crates/command-fds)
|
||
|
|
[](https://docs.rs/command-fds)
|
||
|
|
|
||
|
|
A library for passing arbitrary file descriptors when spawning child processes.
|
||
|
|
|
||
|
|
## Example
|
||
|
|
|
||
|
|
```rust
|
||
|
|
use command_fds::{CommandFdExt, FdMapping};
|
||
|
|
use std::fs::File;
|
||
|
|
use std::os::unix::io::AsRawFd;
|
||
|
|
use std::process::Command;
|
||
|
|
|
||
|
|
// Open a file.
|
||
|
|
let file = File::open("Cargo.toml").unwrap();
|
||
|
|
|
||
|
|
// Prepare to run `ls -l /proc/self/fd` with some FDs mapped.
|
||
|
|
let mut command = Command::new("ls");
|
||
|
|
command.arg("-l").arg("/proc/self/fd");
|
||
|
|
command
|
||
|
|
.fd_mappings(vec![
|
||
|
|
// Map `file` as FD 3 in the child process.
|
||
|
|
FdMapping {
|
||
|
|
parent_fd: file.as_raw_fd(),
|
||
|
|
child_fd: 3,
|
||
|
|
},
|
||
|
|
// Map this process's stdin as FD 5 in the child process.
|
||
|
|
FdMapping {
|
||
|
|
parent_fd: 0,
|
||
|
|
child_fd: 5,
|
||
|
|
},
|
||
|
|
])
|
||
|
|
.unwrap();
|
||
|
|
|
||
|
|
// Spawn the child process.
|
||
|
|
let mut child = command.spawn().unwrap();
|
||
|
|
child.wait().unwrap();
|
||
|
|
```
|
||
|
|
|
||
|
|
## License
|
||
|
|
|
||
|
|
Licensed under the [Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0).
|
||
|
|
|
||
|
|
## Contributing
|
||
|
|
|
||
|
|
If you want to contribute to the project, see details of
|
||
|
|
[how we accept contributions](CONTRIBUTING.md).
|