SubprocessTestParentDeathHelper.cpp File Reference

#include <fcntl.h>
#include <signal.h>
#include <sys/types.h>
#include <glog/logging.h>
#include <folly/Conv.h>
#include <folly/Subprocess.h>
#include <folly/portability/GFlags.h>
#include <folly/portability/Unistd.h>

Go to the source code of this file.

Functions
	DEFINE_bool (child, false,"")
void	runChild (const char *file)
void	runParent (const char *file)
int	main (int argc, char *argv[])

Function Documentation

DEFINE_bool	(	child	,
		false	,
		""
	)

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 73 of file SubprocessTestParentDeathHelper.cpp.

References runChild(), and runParent().

                                 {
  gflags::ParseCommandLineFlags(&argc, &argv, true);
  CHECK_EQ(argc, 2);
  if (FLAGS_child) {
    runChild(argv[1]);
  } else {
    runParent(argv[1]);
  }
  return 0;
}

void runChild

(

const char *

file

)

Definition at line 44 of file SubprocessTestParentDeathHelper.cpp.

References folly::sig.

Referenced by main(), and folly::Subprocess::spawnInternal().

                                {
  // Block SIGUSR1 so it's queued
  sigset_t sigs;
  CHECK_ERR(sigemptyset(&sigs));
  CHECK_ERR(sigaddset(&sigs, kSignal));
  CHECK_ERR(sigprocmask(SIG_BLOCK, &sigs, nullptr));

  // Kill the parent, wait for our signal.
  CHECK_ERR(kill(getppid(), SIGKILL));

  int sig = 0;
  CHECK_ERR(sigwait(&sigs, &sig));
  CHECK_EQ(sig, kSignal);

  // Signal completion by creating the file
  CHECK_ERR(creat(file, 0600));
}

void runParent

(

const char *

file

)

Definition at line 62 of file SubprocessTestParentDeathHelper.cpp.

References folly::Subprocess::poll(), and folly::ProcessReturnCode::running().

Referenced by main().

                                              {
  std::vector<std::string> args{"/proc/self/exe", "--child", file};
  Subprocess proc(args, Subprocess::Options().parentDeathSignal(kSignal));
  CHECK(proc.poll().running());

  // The child will kill us.
  for (;;) {
    pause();
  }
}