Added fqdn command.

dns/GNUmakefile

@@ -1,8 +1,12 @@
 include GNUmakevars
 include GNUmakerules
 
-all: gethostbyname
-install: $(BINDIR)/gethostbyname
+all: gethostbyname fqdn
+install: \
+	$(BINDIR)/gethostbyname \
+	$(BINDIR)/axfr \
+	$(BINDIR)/fqdn \
+
 
 clean:
 	rm -f *.bak *.o core gethostbyname
@@ -15,6 +19,14 @@ cfg/%:
 
 gethostbyname: gethostbyname.o hstrerror.o
 
+fqdn: fqdn.o hstrerror.o
+
 hstrerror.o: cfg/have_hstrerror.h
 
+axfr:
+
+%: %.pl
+	cp $< $@
+	chmod +x $@
+
 -include *.d

dns/fqdn.c

@@ -0,0 +1,37 @@
+#include <netdb.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "hstrerror.h"
+
+char *cmnd;
+
+void usage(void) {
+    fprintf(stderr, "Usage: %s [hostname ...]\n", cmnd);
+    exit(1);
+}
+
+int main(int argc, char **argv) {
+    int i;
+    int rc = 0;
+
+    cmnd = argv[0];
+
+    if (argc < 2) {
+	usage();
+    }
+
+    for (i = 1; i < argc; i++) {
+	struct hostent *he = gethostbyname(argv[i]);
+
+	if (!he) {
+	    fprintf(stderr, "%s: cannot resolve %s: %s\n",
+	    	    argv[0], argv[i], hstrerror(h_errno));
+	    rc++;
+	    continue;
+	}
+
+	printf("%s\n", he->h_name);
+    }
+    return rc;
+}