cmd: Fix empty strings between PATH separators.

Previously if an empty string was encountered while parsing out PATH, cmd.exe would ignore the rest of the PATH entirely. Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55097Signed-off-by: Liam Middlebrook <lmiddlebrook@nvidia.com>

cmd: Fix empty strings between PATH separators.
0911d462 · Liam Middlebrook · Alexandre Julliard · 9aee47f7 · 0911d462
Commit 0911d462 authored Jun 20, 2023 by Liam Middlebrook Committed by Alexandre Julliard Jun 21, 2023
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wcmdmain.c programs/cmd/wcmdmain.c +6 -0

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--- a/programs/cmd/wcmdmain.c
+++ b/programs/cmd/wcmdmain.c
@@ -1135,6 +1135,12 @@ void WCMD_run_program (WCHAR *command, BOOL called)
        else
            lstrcpyW(temp, thisDir + 1);

+        /* When temp is an empty string, skip over it. This needs
+           to be done before the expansion, because WCMD_get_fullpath
+           fails when given an empty string                         */
+        if (*temp == '\0')
+            continue;
+
        /* Since you can have eg. ..\.. on the path, need to expand
           to full information                                      */
        if (!WCMD_get_fullpath(temp, ARRAY_SIZE(thisDir), thisDir, NULL)) return;