#include <glib.h>
#include <string>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>

enum envpOption {
	ENVP_NULL,
	ENVP_PATH,
	ENVP_MISC
}; 

void spawnproc(envpOption opt)
{
    gchar * argv[2];
    gchar * envp[2];
    gchar * g_stdoutBuffer = NULL;
    gchar * g_stderrBuffer = NULL;
	gboolean resultStatus;

    int exit_status;
    GError * gerr = NULL;

    GSpawnFlags flags = (GSpawnFlags)(G_SPAWN_SEARCH_PATH);

    argv[0] = (gchar*)"./my_environ.exe";
    argv[1] = NULL;


	if (opt == ENVP_MISC)
	{
		envp[0] = (gchar *)"HELLO=world";
		envp[1] = NULL;

		resultStatus = g_spawn_sync("/home/mfisch/gspawn_issue",
				argv,
				envp,
				flags,
				NULL,
				NULL,
				&g_stdoutBuffer,
				&g_stderrBuffer,
				&exit_status,
				&gerr);
	}
	else if (opt == ENVP_PATH)
	{
		envp[0] = (gchar *)"PATH=/usr/bin";
		envp[1] = NULL;

		resultStatus = g_spawn_sync("/home/mfisch/gspawn_issue",
				argv,
				envp,
				flags,
				NULL,
				NULL,
				&g_stdoutBuffer,
				&g_stderrBuffer,
				&exit_status,
				&gerr);
	}
	else if (opt == ENVP_NULL)
	{
		resultStatus = g_spawn_sync("/home/mfisch/gspawn_issue",
				argv,
				NULL,
				flags,
				NULL,
				NULL,
				&g_stdoutBuffer,
				&g_stderrBuffer,
				&exit_status,
				&gerr);

	}


    if (gerr) 
	{
        g_warning("error: %s",gerr->message);
    }

    if (g_stdoutBuffer)
    {
		g_debug("result:\n%s",g_stdoutBuffer);
	}

    if (!resultStatus) 
	{
        g_warning("error: spawn failed");
    }
}

int main(void)
{
	g_debug("Calling my_environ with envp set to HELLO=world");
	spawnproc(ENVP_MISC);
	g_debug("------------------------------------");
	g_debug("Calling my_environ with envp set to PATH=/usr/bin");
	spawnproc(ENVP_PATH);
	g_debug("------------------------------------");
#if 0
	g_debug("Calling my_environ with envp Disabled");
	spawnproc(ENVP_NULL);
	g_debug("------------------------------------");
#endif
}