# HG changeset patch
# User Rob Landley <rob@landley.net>
# Date 1401362952 18000
# Node ID b91284c2e56964847304d1db648faeea10fb2fdd
# Parent  4d898affda0c50ab98f5be4412e748f3216af260
Make "losetup /dev/loop0 filename" work.

Sigh. Implement the complex cases and you screw up the simple cases you already tested...

diff -r 4d898affda0c -r b91284c2e569 toys/other/losetup.c
--- a/toys/other/losetup.c	Thu May 29 05:22:02 2014 -0500
+++ b/toys/other/losetup.c	Thu May 29 06:29:12 2014 -0500
@@ -179,10 +179,13 @@
   } else {
     char *file = (toys.optflags & (FLAG_d|FLAG_c)) ? NULL : toys.optargs[1];
 
-    if (!toys.optc || (file && toys.optc>1)) {
+    if (!toys.optc || (file && toys.optc != 2)) {
       toys.exithelp++;
-      perror_exit("needs 1 arg");
+      perror_exit("needs %d arg%s", 1+!!file, file ? "s" : "");
     }
-    for (s = toys.optargs; *s; s++) loopback_setup(*s, file);
+    for (s = toys.optargs; *s; s++) {
+      loopback_setup(*s, file);
+      if (file) break;
+    }
   }
 }