[PATCH] kernel32: Allow double quote style escape in argv

[Brendan McGrath]

In Windows, two quotes together (within outer quotes) represents a
single quote (with the first quote acting as an escape character)

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46721
Signed-off-by: Brendan McGrath <brendan at redmandi.com>
---
 dlls/kernel32/process.c       | 17 +++++++++++++----
 dlls/kernel32/tests/process.c |  7 ++++---
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/dlls/kernel32/process.c b/dlls/kernel32/process.c
index ad257a054e4..89b561ef811 100644
--- a/dlls/kernel32/process.c
+++ b/dlls/kernel32/process.c
@@ -1505,9 +1505,13 @@ static char **build_argv( const UNICODE_STRING *cmdlineW, int reserved )
             /* '\', count them */
             bcount++;
         } else if ((*s=='"') && ((bcount & 1)==0)) {
-            /* unescaped '"' */
-            in_quotes=!in_quotes;
-            bcount=0;
+            if (in_quotes && s[1] == '"') {
+               s++;
+            } else {
+               /* unescaped '"' */
+               in_quotes=!in_quotes;
+               bcount=0;
+            }
         } else {
             /* a regular character */
             bcount=0;
@@ -1551,7 +1555,12 @@ static char **build_argv( const UNICODE_STRING *cmdlineW, int reserved )
                  */
                 d-=bcount/2;
                 s++;
-                in_quotes=!in_quotes;
+                if(in_quotes && *s == '"') {
+                  *d++='"';
+                  s++;
+                } else {
+                  in_quotes=!in_quotes;
+                }
             } else {
                 /* Preceded by an odd number of '\', this is half that
                  * number of '\' followed by a '"'
diff --git a/dlls/kernel32/tests/process.c b/dlls/kernel32/tests/process.c
index fe68d28e914..f62f8fb0ba1 100644
--- a/dlls/kernel32/tests/process.c
+++ b/dlls/kernel32/tests/process.c
@@ -896,7 +896,7 @@ static void test_CommandLine(void)
 
     /* the basics */
     get_file_name(resfile);
-    sprintf(buffer, "\"%s\" tests/process.c dump \"%s\" \"C:\\Program Files\\my nice app.exe\"", selfname, resfile);
+    sprintf(buffer, "\"%s\" tests/process.c dump \"%s\" \"C:\\Program Files\\my nice app.exe\" \"\"\"\"", selfname, resfile);
     ok(CreateProcessA(NULL, buffer, NULL, NULL, FALSE, 0L, NULL, NULL, &startup, &info), "CreateProcess\n");
     /* wait for child to terminate */
     ok(WaitForSingleObject(info.hProcess, 30000) == WAIT_OBJECT_0, "Child process termination\n");
@@ -905,9 +905,10 @@ static void test_CommandLine(void)
     CloseHandle(info.hThread);
     CloseHandle(info.hProcess);
 
-    okChildInt("Arguments", "argcA", 5);
+    okChildInt("Arguments", "argcA", 6);
     okChildString("Arguments", "argvA4", "C:\\Program Files\\my nice app.exe");
-    okChildString("Arguments", "argvA5", NULL);
+    okChildString("Arguments", "argvA5", "\"");
+    okChildString("Arguments", "argvA6", NULL);
     okChildString("Arguments", "CommandLineA", buffer);
     release_memory();
     DeleteFileA(resfile);
-- 
2.17.1