# HG changeset patch
# User Rob Landley <rob@landley.net>
# Date 1426791422 18000
# Node ID 0c30e5484516079fa1362c16cf02031d7256d629
# Parent  da1296acc73eecb2b5426d6a604f0aaae70318ea
Add -123 support to head (suggested by Elliott Hughes).

diff -r da1296acc73e -r 0c30e5484516 toys/posix/head.c
--- a/toys/posix/head.c	Wed Mar 18 16:32:01 2015 -0500
+++ b/toys/posix/head.c	Thu Mar 19 13:57:02 2015 -0500
@@ -4,7 +4,7 @@
  *
  * See http://opengroup.org/onlinepubs/9699919799/utilities/head.html
 
-USE_HEAD(NEWTOY(head, "n#<0=10", TOYFLAG_BIN))
+USE_HEAD(NEWTOY(head, "?n#<0=10", TOYFLAG_BIN))
 
 config HEAD
   bool "head"
@@ -50,5 +50,12 @@
 
 void head_main(void)
 {
-  loopfiles(toys.optargs, do_head);
+  char *arg = *toys.optargs;
+
+  // handle old "-42" style arguments
+  if (arg && *arg == '-' && arg[1]) {
+    TT.lines = atolx(arg+1);
+    toys.optc--;
+  }
+  loopfiles(toys.optargs+!!arg, do_head);
 }