From caa2dd77749dc91d621f01187e20327aa413a3d7 Mon Sep 17 00:00:00 2001
From: comex
Date: Sat, 17 Jan 2015 14:40:29 -0500
Subject: interpose works; add test

---
 test/test-interpose.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 test/test-interpose.c

(limited to 'test/test-interpose.c')

diff --git a/test/test-interpose.c b/test/test-interpose.c
new file mode 100644
index 0000000..ea28abb
--- /dev/null
+++ b/test/test-interpose.c
@@ -0,0 +1,35 @@
+#include "substitute.h"
+
+#include <unistd.h>
+#include <stdio.h>
+#include <mach-o/dyld.h>
+#include <assert.h>
+
+static void *getpid_plus = (void *) getpid + 5;
+
+static pid_t (*old_getpid)();
+static pid_t my_getpid() {
+	return old_getpid() + 1;
+}
+static gid_t my_getgid() {
+	return 42;
+}
+
+int main() {
+	const char *self = _dyld_get_image_name(0);
+	void *handle = substitute_open_image(self);
+	assert(handle);
+	struct substitute_import_hook hooks[] = {
+		{"_getpid", my_getpid, &old_getpid},
+		{"_getgid", my_getgid, NULL},
+
+	};
+	pid_t (*gp)() = getpid_plus - 5;
+	printf("original pid: %d\n", (int) gp());
+	substitute_interpose_imports(handle, hooks, sizeof(hooks)/sizeof(*hooks), 0);
+	gp = getpid_plus - 5;
+	printf("new pid: %d\n", (int) gp());
+	printf("new gid: %d\n", (int) getgid());
+
+	substitute_close_image(handle);
+}
-- 
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