use os.posix_get_error_msg

src/unlink/unlink.c.v

@@ -1,3 +1,5 @@
+import os
+
 #include <sys/stat.h> // #include <signal.h>
 #include <errno.h>
 #include <unistd.h>
@@ -8,61 +10,10 @@ $if freebsd || openbsd {
 
 fn C.unlink(&char) int
 
-// TODO: See if this can be imported from somewhere
-pub enum Errno {
-	enoerror = 0x00000000
-	e2big    = 0x00000007
-	eacces   = 0x0000000d
-	eagain   = 0x0000000b
-	ebadf    = 0x00000009
-	ebusy    = 0x00000010
-	echild   = 0x0000000a
-	edom     = 0x00000021
-	eexist   = 0x00000011
-	efault   = 0x0000000e
-	efbig    = 0x0000001b
-	eintr    = 0x00000004
-	einval   = 0x00000016
-	eio      = 0x00000005
-	eisdir   = 0x00000015
-	emfile   = 0x00000018
-	emlink   = 0x0000001f
-	enfile   = 0x00000017
-	enodev   = 0x00000013
-	enoent   = 0x00000002
-	enoexec  = 0x00000008
-	enomem   = 0x0000000c
-	enospc   = 0x0000001c
-	enotblk  = 0x0000000f
-	enotdir  = 0x00000014
-	enotty   = 0x00000019
-	enxio    = 0x00000006
-	eperm    = 0x00000001
-	epipe    = 0x00000020
-	erange   = 0x00000022
-	erofs    = 0x0000001e
-	espipe   = 0x0000001d
-	esrch    = 0x00000003
-	etxtbsy  = 0x0000001a
-	exdev    = 0x00000012
-}
-
 fn unlink(settings Settings) {
 	err := C.unlink(&char(settings.target.str))
 	if err != 0 {
-		unsafe {
-			e := Errno(C.errno)
-			match e {
-				.enoent {
-					fail("cannot unlink '${settings.target}': No such file or directory")
-				}
-				.eisdir {
-					fail("cannot unlink '${settings.target}': Is a directory")
-				}
-				else {
-					fail("cannot unlink '${settings.target}': error ${e}")
-				}
-			}
-		}
+		posix_error := os.posix_get_error_msg(C.errno)
+		fail("cannot unlink '${settings.target}': ${posix_error}")
 	}
 }