52 lines
1.4 KiB
Rust
52 lines
1.4 KiB
Rust
use std::fmt::Display;
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use crate::prelude::*;
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pub const SIG_EXIT_OFFSET: i32 = 128;
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pub fn get_bin_path(command: &str, shenv: &ShEnv) -> Option<PathBuf> {
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let env = shenv.vars().env();
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let path_var = env.get("PATH")?;
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let mut paths = path_var.split(':');
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while let Some(raw_path) = paths.next() {
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let mut path = PathBuf::from(raw_path);
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path.push(command);
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//TODO: handle this unwrap
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if path.exists() {
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return Some(path)
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}
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}
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None
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}
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pub fn write_out(text: impl Display) -> ShResult<()> {
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write(borrow_fd(1), text.to_string().as_bytes())?;
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Ok(())
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}
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pub fn write_err(text: impl Display) -> ShResult<()> {
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write(borrow_fd(2), text.to_string().as_bytes())?;
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Ok(())
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}
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/// Return is `readpipe`, `writepipe`
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/// Contains all of the necessary boilerplate for grabbing two pipe fds using libc::pipe()
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pub fn c_pipe() -> Result<(RawFd,RawFd),Errno> {
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let mut pipes: [i32;2] = [0;2];
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let ret = unsafe { libc::pipe(pipes.as_mut_ptr()) };
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if ret < 0 {
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return Err(Errno::from_raw(ret))
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}
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Ok((pipes[0],pipes[1]))
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}
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pub fn execvpe(cmd: String, argv: Vec<String>, envp: Vec<String>) -> Result<(),Errno> {
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let cmd_raw = CString::new(cmd).unwrap();
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let argv = argv.into_iter().map(|arg| CString::new(arg).unwrap()).collect::<Vec<CString>>();
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let envp = envp.into_iter().map(|var| CString::new(var).unwrap()).collect::<Vec<CString>>();
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nix::unistd::execvpe(&cmd_raw, &argv, &envp).unwrap();
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Ok(())
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}
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