+/* ----------------------------------------------------------------------
+ * String handling routines.
+ */
+
+char *dupstr(char *s)
+{
+ int len = strlen(s);
+ char *p = smalloc(len + 1);
+ strcpy(p, s);
+ return p;
+}
+
+/* Allocate the concatenation of N strings. Terminate arg list with NULL. */
+char *dupcat(char *s1, ...)
+{
+ int len;
+ char *p, *q, *sn;
+ va_list ap;
+
+ len = strlen(s1);
+ va_start(ap, s1);
+ while (1) {
+ sn = va_arg(ap, char *);
+ if (!sn)
+ break;
+ len += strlen(sn);
+ }
+ va_end(ap);
+
+ p = smalloc(len + 1);
+ strcpy(p, s1);
+ q = p + strlen(p);
+
+ va_start(ap, s1);
+ while (1) {
+ sn = va_arg(ap, char *);
+ if (!sn)
+ break;
+ strcpy(q, sn);
+ q += strlen(q);
+ }
+ va_end(ap);
+
+ return p;
+}
+
+/* ----------------------------------------------------------------------