1 files changed, 57 insertions, 0 deletions
diff --git a/rubystub.c b/rubystub.c
new file mode 100644
index 0000000000..80b04d4b27
--- /dev/null
+++ b/rubystub.c
@@ -0,0 +1,57 @@
+#include "internal.h"
+#if defined HAVE_DLADDR
+#include <dlfcn.h>
+#endif
+static void* stub_options(int argc, char **argv);
+#define ruby_options stub_options
+#include <main.c>
+#undef ruby_options
+
+void *
+stub_options(int argc, char **argv)
+{
+    char xflag[] = "-x";
+    char *xargv[4] = {NULL, xflag};
+    char *cmd = argv[0];
+    void *ret;
+
+#if defined __CYGWIN__ || defined _WIN32
+    /* GetCommandLineW should contain the accessible path,
+     * use argv[0] as is */
+#elif defined __linux__
+    {
+	char selfexe[MAXPATHLEN];
+	ssize_t len = readlink("/proc/self/exe", selfexe, sizeof(selfexe));
+	if (len < 0) {
+	    perror("readlink(\"/proc/self/exe\")");
+	    return NULL;
+	}
+	selfexe[len] = '\0';
+	cmd = selfexe;
+    }
+#elif defined HAVE_DLADDR
+    {
+	Dl_info dli;
+	if (!dladdr(stub_options, &dli)) {
+	    perror("dladdr");
+	    return NULL;
+	}
+	cmd = (char *)dli.dli_fname;
+    }
+#endif
+
+#ifndef HAVE_SETPROCTITLE
+    /* argc and argv must be the original */
+    ruby_init_setproctitle(argc, argv);
+#endif
+
+    /* set script with -x option */
+    /* xargv[0] is NULL not to re-initialize setproctitle again */
+    xargv[2] = cmd;
+    ret = ruby_options(3, xargv);
+
+    /* set all arguments to ARGV */
+    ruby_set_argv(argc - 1, argv + 1);
+
+    return ret;
+}