cmd: Allow numbered redirects at the beginning of a line.

programs/cmd/tests/test_builtins.cmd

@@ -176,6 +176,15 @@ del foo
 echo foo> foo
 echo foo7 7>> foo || (echo not supported & del foo)
 if exist foo (type foo) else echo not supported
+echo --- redirect at beginning of line
+>foo (echo foo)
+type foo
+1>foo (echo foo1)
+type foo
+2>foo (echo foo2 >&2)
+type foo
+>>foo (echo fooA)
+type foo
 echo --- redirections within IF statements
 if 1==1 echo foo1>bar
 type bar & del bar

programs/cmd/tests/test_builtins.cmd.exp

@@ -204,6 +204,12 @@ food2
 food21
 @todo_wine@foo7@space@@space@@or_broken@not supported@space@
 @todo_wine@foo@or_broken@not supported
+--- redirect at beginning of line
+foo
+foo1
+foo2@space@
+foo2@space@
+fooA
 --- redirections within IF statements
 foo1
 foo2

programs/cmd/wcmdmain.c

@@ -2070,9 +2070,9 @@ WCHAR *WCMD_ReadAndParseLine(const WCHAR *optionalcmd, CMD_LIST **output, HANDLE
                 /* See if 1>, 2> etc, in which case we have some patching up
                    to do (provided there's a preceding whitespace, and enough
                    chars read so far) */
-                if (curStringLen > 2
-                        && (*(curPos-1)>='1') && (*(curPos-1)<='9')
-                        && ((*(curPos-2)==' ') || (*(curPos-2)=='\t'))) {
+                if (curPos[-1] >= '1' && curPos[-1] <= '9'
+                        && (curStringLen == 1 ||
+                            curPos[-2] == ' ' || curPos[-2] == '\t')) {
                     curStringLen--;
                     curString[curStringLen] = 0x00;
                     curCopyTo[(*curLen)++] = *(curPos-1);