/*
 *	This function queries pg_config to check for specific
 *	configure flags used to build PostgreSQL.  It can be
 *	easily modified to return true/false to the caller.
 *	This example tests thread safety.
 */
#include <stdio.h>
#include <string.h>


#define PG_CONFIG_CMD	"pg_config --configure"
/*
 *	pg_config's output should fit in one string because we don't want
 *	the search string to split across reads.
 */
#define POPEN_READ		8192

int
main(int argc, char *argv[])
{
	FILE	*p;
	char	str[POPEN_READ];
	
	if ((p = popen(PG_CONFIG_CMD, "r")) == NULL ||
		fgets(str, POPEN_READ, p) == NULL)
	{
		fprintf(stderr, "Cannot run \"%s\", perhaps incorrect $PATH", PG_CONFIG_CMD);
		if (p)
			pclose(p);
		exit(2);
	}

	pclose(p);

	if (strstr(str, "--enable-thread-safety") != NULL)
	{
		puts("threading enabled");
		return 0;
	}
	else
	{
		puts("threading not enabled");
		return 1;
	}
}