1 files changed, 34 insertions, 0 deletions
diff --git a/dnsname.c b/dnsname.c
new file mode 100644
index 0000000..0e5eb26
--- /dev/null
+++ b/dnsname.c
@@ -0,0 +1,34 @@
+#include "buffer.h"
+#include "exit.h"
+#include "strerr.h"
+#include "ip4.h"
+#include "dns.h"
+
+#define FATAL "dnsname: fatal: "
+
+static char seed[128];
+
+char ip[4];
+static stralloc out;
+
+int main(int argc,char **argv)
+{
+  dns_random_init(seed);
+
+  if (*argv) ++argv;
+
+  while (*argv) {
+    if (!ip4_scan(*argv,ip))
+      strerr_die3x(111,FATAL,"unable to parse IP address ",*argv);
+    if (dns_name4(&out,ip) == -1)
+      strerr_die4sys(111,FATAL,"unable to find host name for ",*argv,": ");
+
+    buffer_put(buffer_1,out.s,out.len);
+    buffer_puts(buffer_1,"\n");
+
+    ++argv;
+  }
+
+  buffer_flush(buffer_1);
+  _exit(0);
+}