From 7cba7952cde7f33f4d37763acaf482f0e01cdce7 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fw@deneb.enyo.de>
Date: Sat, 17 May 2008 12:39:28 +0200
Subject: [PATCH] Add PID-setting preloadable DSO

---
 gen/.gitignore |  1 +
 gen/Makefile   | 20 ++++++++++++++++++++
 gen/setpid.c   |  7 +++++++
 3 files changed, 28 insertions(+)
 create mode 100644 gen/.gitignore
 create mode 100644 gen/Makefile
 create mode 100644 gen/setpid.c

diff --git a/gen/.gitignore b/gen/.gitignore
new file mode 100644
index 0000000..942e74c
--- /dev/null
+++ b/gen/.gitignore
@@ -0,0 +1 @@
+/setpid-*.so
diff --git a/gen/Makefile b/gen/Makefile
new file mode 100644
index 0000000..02a83ab
--- /dev/null
+++ b/gen/Makefile
@@ -0,0 +1,20 @@
+arch := $(shell dpkg-architecture -qDEB_HOST_ARCH)
+dso := setpid-$(arch).so
+
+.PHONY: all clean clean-all check-setpid
+
+all: $(dso)
+
+clean:
+	-rm -f $(dso)
+
+clean-all:
+	-rm -f *.so
+
+$(dso) : setpid.c
+	$(CC) $(CFLAGS) -fPIC -shared -o $@ $^
+
+check-setpid : $(dso)
+	test 555 = `SETPID=555 LD_PRELOAD=./$(dso) /bin/sh -c 'echo $$$$'`
+	test 555 = `SETPID=555 LD_PRELOAD=./$(dso) /bin/sh -c 'echo $$$$'`
+	test 555 = `SETPID=555 LD_PRELOAD=./$(dso) /bin/sh -c 'echo $$$$'`
diff --git a/gen/setpid.c b/gen/setpid.c
new file mode 100644
index 0000000..a708848
--- /dev/null
+++ b/gen/setpid.c
@@ -0,0 +1,7 @@
+#include <stdlib.h>
+
+int
+getpid(void)
+{
+  return atoi(getenv("SETPID"));
+}
-- 
2.11.4.GIT