/*
 * <https://forge.univention.org/bugzilla/show_bug.cgi?id=40059>
 */
#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <grp.h>
#include <string.h>
#include <limits.h>
#include <stdarg.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

#define ARRAY_SIZE(a) ((sizeof (a)) / sizeof (*(a)))
#define BUFLEN 4096

// cyrus-sasl
int check(void) {
	const char *addr = "0.0.0.0;7636";
	char hbuf[NI_MAXHOST];
	struct addrinfo hints, *ai = NULL;
	int i, j;

	/* Parse the address */
	for (i = 0; addr[i] != '\0' && addr[i] != ';'; i++) {
		if (i >= NI_MAXHOST)
			return 3;
		hbuf[i] = addr[i];
	}
	hbuf[i] = '\0';

	if (addr[i] == ';')
		i++;
	/* XXX: Do we need this check? */
	for (j = i; addr[j] != '\0'; j++)
		if (!isdigit((int)(addr[j])))
			return 2;

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = PF_UNSPEC;
	hints.ai_socktype = SOCK_STREAM;
	hints.ai_flags = AI_PASSIVE | AI_NUMERICHOST;
	if (getaddrinfo(hbuf, &addr[i], &hints, &ai) != 0)
		return 1;

	freeaddrinfo(ai);

	return 0;
}

static pthread_t thread[10];

static void *run(void *data) {
	unsigned int round, j;

	unsigned int self = (unsigned int)(unsigned long)data;
	pthread_t tid = pthread_self();

	printf("[%d] POSIX thread ID is %u\n", self, (unsigned int)tid);

	for (round = 0; round < 1000; round++) {
		for (j = 0; j < 1000; j++) {
			int i;
			i = check();
			if (i)
				break;
		}
		printf("%d\n", round);

		unsigned int usecs = (round * (unsigned int)tid) % 1000000;
		usleep(usecs);
		if (round % 10 == 0)
			putchar('0' + (self % 10));
	}

	printf("[%d] end\n", self);
	pthread_exit(NULL);
}

int main(int argc, char *argv[], char *envp[]) {
	pid_t pid = getpid();
	printf("pid=%d\n", pid);

	unsigned int t;
	for (t = 0; t < ARRAY_SIZE(thread); t++)
		pthread_create(&thread[t], NULL, run, (void *)(long)t);

	int ret = 0;
	void *value_ptr;
	for (t = 0; t < ARRAY_SIZE(thread); t++)
		ret |= pthread_join(thread[t], &value_ptr);

	return ret;
}
/* :!gcc -O0 -g -Wall -lpthread % */