A library for passing arbitrary file descriptors when spawning child processes.
```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
.fdmappings(vec![
// Map file as FD 3 in the child process.
FdMapping {
parentfd: file.asrawfd(),
childfd: 3,
},
// Map this process's stdin as FD 5 in the child process.
FdMapping {
parentfd: 0,
child_fd: 5,
},
])
.unwrap();
// Spawn the child process. let mut child = command.spawn().unwrap(); child.wait().unwrap(); ```
Licensed under the Apache License, Version 2.0.
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