#include "util.h"
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <pwd.h>
#include <stdio.h>

char *util_userHome(int uid, char *buffer, size_t len)
{
	struct passwd pwd;
	struct passwd *res;
	char b[1000];
	getpwuid_r(uid, &pwd, b, sizeof b, &res);
	if (res == NULL || res->pw_dir == NULL)
		return NULL;
	int printret = snprintf(buffer, len, "%s", res->pw_dir);
	if (printret < 0 || printret >= (int)len)
		return NULL;
	buffer[len-1] = '\0';
	return buffer;
}

char *util_sockPath(int uid, int pid, char *buffer, size_t len)
{
	char home[120];
	if (uid == -1) {
		uid = (int)getuid();
	}
	if (pid == -1) {
		pid = (int)getpid();
	}
	if (util_userHome(uid, home, sizeof home) == NULL)
		return NULL;
	int printret = snprintf(buffer, len, "%s/.printergui.%d", pid);
	if (printret < 0 || printret >= (int)len)
		return NULL;
	return buffer;
}