1 files changed, 42 insertions, 0 deletions
diff --git a/win32/stub.c b/win32/stub.c
new file mode 100644
index 0000000000..fc82d73e2c
--- /dev/null
+++ b/win32/stub.c
@@ -0,0 +1,42 @@
+#include <ruby.h>
+static void stub_sysinit(int *argc, char ***argv);
+#define ruby_sysinit stub_sysinit
+#include <main.c>
+#undef ruby_sysinit
+
+void
+stub_sysinit(int *argc, char ***argv)
+{
+    char exename[4096];
+    size_t lenexe, len0, lenall;
+    int i, ac;
+    char **av, *p;
+
+    lenexe = (size_t)GetModuleFileName(NULL, exename, sizeof exename);
+    ruby_sysinit(argc, argv);
+    ac = *argc;
+    av = *argv;
+    len0 = strlen(av[0]) + 1;
+    lenall = 0;
+    for (i = 1; i < ac; ++i) {
+	lenall += strlen(av[i]) + 1;
+    }
+    *argv = av = realloc(av, lenall + (lenexe + 1) * 2 + sizeof(char *) * (i + 2));
+    *argc = ++ac;
+    p = (char *)(av + i + 2);
+    memmove(p + (lenexe + 1) * 2, (char *)(av + ac) + len0, lenall);
+    memcpy(p, exename, lenexe);
+    p[lenexe] = '\0';
+    *av++ = p;
+    p += lenexe + 1;
+    memcpy(p, exename, lenexe);
+    p[lenexe] = '\0';
+    *av++ = p;
+    p += lenexe + 1;
+    while (--i) {
+	*av++ = p;
+	p += strlen(p) + 1;
+    }
+    *av = NULL;
+}
+