From 2452b7a318fa81edac19d97b21945ef984f5340c Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Wed, 18 Jul 2007 16:43:56 +1000
Subject: [PATCH] added mkdir_preload

---
 mkdir_preload/Makefile        | 11 +++++++++++
 mkdir_preload/mkdir_preload.c | 30 ++++++++++++++++++++++++++++++
 mkdir_preload/testprog.c      | 21 +++++++++++++++++++++
 3 files changed, 62 insertions(+)
 create mode 100644 mkdir_preload/Makefile
 create mode 100644 mkdir_preload/mkdir_preload.c
 create mode 100644 mkdir_preload/testprog.c

diff --git a/mkdir_preload/Makefile b/mkdir_preload/Makefile
new file mode 100644
index 0000000..b6d7fe3
--- /dev/null
+++ b/mkdir_preload/Makefile
@@ -0,0 +1,11 @@
+CFLAGS=-Wall -fPIC -O2
+LIBS=-ldl
+
+all: mkdir_preload.so
+
+mkdir_preload.so: mkdir_preload.o
+	ld -shared -o $@ $^ $(LIBS)
+
+clean:
+	/bin/rm -f *.o *.so *~ 
+
diff --git a/mkdir_preload/mkdir_preload.c b/mkdir_preload/mkdir_preload.c
new file mode 100644
index 0000000..252c0dd
--- /dev/null
+++ b/mkdir_preload/mkdir_preload.c
@@ -0,0 +1,30 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <fcntl.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <dlfcn.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int mkdir(const char *pathname, mode_t mode)
+{
+	static int (*mkdir_orig)(const char *pathname, mode_t mode);
+	int logfd;
+	struct stat st;
+	if (!mkdir_orig) {
+		mkdir_orig = dlsym(RTLD_NEXT, "mkdir");
+	}
+	logfd = open("/tmp/mkdir.log", O_APPEND|O_WRONLY|O_CREAT, 0666);
+	if (logfd != -1) {
+		dprintf(logfd, "%-8s %s\n", 
+			stat(pathname, &st) == 0? "exist":"notexist",
+			pathname);
+		close(logfd);
+	}
+	return mkdir_orig(pathname, mode);
+}
diff --git a/mkdir_preload/testprog.c b/mkdir_preload/testprog.c
new file mode 100644
index 0000000..e37d9cd
--- /dev/null
+++ b/mkdir_preload/testprog.c
@@ -0,0 +1,21 @@
+void another_function(int *yy)
+{
+	/* add some local variables for "bt full" to see */
+	int y = 7;
+	double foo = 1.2;
+	*yy = 2;
+}
+
+void foo(int *x)
+{
+	/* add some local variables for "bt full" to see */
+	int foovar = 7;
+	double myval = 1.2;
+	another_function(x);
+}
+
+int main(void)
+{
+	foo((int *)3);
+	return 0;
+}
-- 
2.34.1