parent --> libcasper
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	jfree
	Jul 21 2023, 9:36 PM

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parent --> libcasper
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	#include <sys/nv.h>

	#define WITH_CASPER 1

	#include <err.h>
	#include <libcasper.h>
	#include <libcasper_service.h>
	#include <stdio.h>
	#include <string.h>

	int val;
	cap_channel_t *cap_config;

	int
	main(void)
	{
	val = 1024;

	cap_channel_t *cap_casper = cap_init();
	if (cap_casper == NULL)
	err(1, "failed to contact casper");
	cap_config = cap_service_open(cap_casper, "casper.test");
	if (cap_config == NULL)
	err(1, "failed to open test service");
	cap_close(cap_casper);

	nvlist_t *nvl = nvlist_create(0);
	nvlist_add_string(nvl, "cmd", "print");

	printf("parent cap_config: %p\n", cap_config);
	printf("parent val: %d\n", val);
	if (cap_send_nvlist(cap_config, nvl) == -1)
	err(1, "send failed");

	return (0);
	}

	static int
	cmd(const char cmd, const nvlist_t nvlim,
	nvlist_t nvnew, nvlist_t nvold)
	{
	if (strcmp(cmd, "print") == 0) {
	printf("casper cap_config: %p\n", cap_config);
	printf("casper val: %d\n", val);
	}
	return (0);
	}

	CREATE_SERVICE("casper.test", NULL, cmd, CASPER_SERVICE_STDIO);