+#ifndef HAVE_STRLCAT
+/**
+ * Like strncat() but does not 0 fill the buffer and always null
+ * terminates.
+ *
+ * @param bufsize length of the buffer, which should be one more than
+ * the maximum resulting string length.
+ **/
+ size_t strlcat(char *d, const char *s, size_t bufsize)
+{
+ size_t len1 = strlen(d);
+ size_t len2 = strlen(s);
+ size_t ret = len1 + len2;
+
+ if (len1+len2 >= bufsize) {
+ len2 = bufsize - (len1+1);
+ }
+ if (len2 > 0) {
+ memcpy(d+len1, s, len2);
+ d[len1+len2] = 0;
+ }
+ return ret;
+}
+#endif
+
+#ifdef REPLACE_INET_NTOA
+ char *rep_inet_ntoa(struct in_addr ip)
+{
+ unsigned char *p = (unsigned char *)&ip.s_addr;
+ static char buf[18];
+#if WORDS_BIGENDIAN
+ snprintf(buf, 18, "%d.%d.%d.%d",
+ (int)p[0], (int)p[1], (int)p[2], (int)p[3]);
+#else
+ snprintf(buf, 18, "%d.%d.%d.%d",
+ (int)p[3], (int)p[2], (int)p[1], (int)p[0]);
+#endif
+ return buf;
+}
+#endif
+
+#ifdef REPLACE_INET_ATON
+ int inet_aton(const char *cp, struct in_addr *inp)
+{
+ unsigned int a1, a2, a3, a4;
+ unsigned long ret;
+
+ if (strcmp(cp, "255.255.255.255") == 0) {
+ inp->s_addr = (unsigned) -1;
+ return 0;
+ }
+
+ if (sscanf(cp, "%u.%u.%u.%u", &a1, &a2, &a3, &a4) != 4 ||
+ a1 > 255 || a2 > 255 || a3 > 255 || a4 > 255) {
+ return 0;
+ }
+
+ ret = (a1 << 24) | (a2 << 16) | (a3 << 8) | a4;
+
+ inp->s_addr = htonl(ret);
+
+ if (inp->s_addr == (unsigned) -1) {
+ return 0;
+ }
+ return 1;
+}
+#endif
+
+/* some systems don't take the 2nd argument */
+int sys_gettimeofday(struct timeval *tv)
+{
+#if HAVE_GETTIMEOFDAY_TZ
+ return gettimeofday(tv, NULL);
+#else
+ return gettimeofday(tv);
+#endif
+}