[PATCH xorg-gtest] xserver: add environment variable to suspend after startup

[Peter Hutterer]

Allows for attaching gdb to a server without messing around too much in the
test code.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 README          |    5 +++++
 src/xserver.cpp |    6 ++++++
 2 files changed, 11 insertions(+)

diff --git a/README b/README
index 7a44075..33e1fe3 100644
--- a/README
+++ b/README
@@ -74,3 +74,8 @@ xorg-gtest main() library targets if you will not use them. Copy the gtest and
 xorg-gtest library targets if multiple builds with different compilation flags
 are needed. Finally, link the tests with the appropriate gtest and xorg-gtest
 libraries and their dependencies: libpthread and libX11.
+
+Environment variables
+---------------------
+XORG_GTEST_XSERVER_SIGSTOP
+  If set, an XServer object will raise a SIGSTOP signal after startup.
diff --git a/src/xserver.cpp b/src/xserver.cpp
index b420dd1..bb25373 100644
--- a/src/xserver.cpp
+++ b/src/xserver.cpp
@@ -302,6 +302,12 @@ void xorg::testing::XServer::Start(const std::string &program) {
   }
 
   Process::Start(program.empty() ? d_->path_to_server : program, args);
+
+  if (Pid() > 0) {
+    char *sleepwait = getenv("XORG_GTEST_XSERVER_SIGSTOP");
+    if (sleepwait)
+      raise(SIGSTOP);
+  }
 }
 
 bool xorg::testing::XServer::Terminate(unsigned int timeout) {
-- 
1.7.10.4