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

[Alexandre Julliard]

Module: wine
Branch: master
Commit: eba7092f0aba75b71175f0426ad05a4d880250a3
URL:    https://gitlab.winehq.org/wine/wine/-/commit/eba7092f0aba75b71175f0426ad05a4...

Author: Alex Henrie <alexhenrie24(a)gmail.com>
Date:   Fri Jun 30 23:24:45 2023 -0600

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

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55124

---

 programs/cmd/tests/test_builtins.cmd     | 9 +++++++++
 programs/cmd/tests/test_builtins.cmd.exp | 6 ++++++
 programs/cmd/wcmdmain.c                  | 6 +++---
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/programs/cmd/tests/test_builtins.cmd b/programs/cmd/tests/test_builtins.cmd
index eaee2900bc9..0cb05041fa9 100644
--- a/programs/cmd/tests/test_builtins.cmd
+++ b/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
diff --git a/programs/cmd/tests/test_builtins.cmd.exp b/programs/cmd/tests/test_builtins.cmd.exp
index 411eae303ac..16f9d647b8a 100644
--- a/programs/cmd/tests/test_builtins.cmd.exp
+++ b/programs/cmd/tests/test_builtins.cmd.exp
@@ -204,6 +204,12 @@ food2
 food21
 @todo_wine(a)foo7@space@@space@@or_broken(a)not supported(a)space@
 @todo_wine(a)foo@or_broken(a)not supported
+--- redirect at beginning of line
+foo
+foo1
+foo2(a)space@
+foo2(a)space@
+fooA
 --- redirections within IF statements
 foo1
 foo2
diff --git a/programs/cmd/wcmdmain.c b/programs/cmd/wcmdmain.c
index de6e721b26a..298606f6caa 100644
--- a/programs/cmd/wcmdmain.c
+++ b/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);