shithub: mc

ref: c5649fe3ddc066335f816d59a4f31b9c26b1c230
dir: /lib/std/syswrap-ss+plan9.myr/

use sys

use "errno"
use "cstrconv"

pkg std =
	$noret const exit	: (status : int -> void)
	pkglocal const bgetcwd	: (buf : byte[:] -> errno)
;;

const bgetcwd = {buf
	var fd

	fd = sys.open(".", sys.Ordonly)
	if fd < 0
		-> fd castto(errno)
	;;

	if sys.fd2path(fd, buf) == 0
		/*
		Because we don't return the size, the best we can do is
		assume that if the buffer is completely full, we have
		truncated it. Since we truncate at utf8 characters, we
		can have at most 3 bytes truncated (4 bytes will fit
		any utf8 char), and one byte for the nul terminator.
		*/
		if cstrlen(buf) + 5 == buf.len
			-> Erange
		else
			-> cstrlen(buf) castto(errno)
		;;
	;;
	-> Emisc
}

const digitchars = "0123456789"
const exit	= {status
	var buf : byte[32]	/* big enough for exit status numbers */
	var n, i
	
	if status == 0
		sys.exits("")
	else
		status &= 255
		i = 100
		n = 0
		while i > 0
			if status >= i
				buf[n++] = digitchars[(status/i)%10]
			;;
			i /= 10
		;;
		sys.exits(buf[:n])
	;;
}