1 files changed, 161 insertions, 0 deletions
diff --git a/src/tests/resolve/resolve.c b/src/tests/resolve/resolve.c
new file mode 100644
index 000000000000..7339d21bd9ac
--- /dev/null
+++ b/src/tests/resolve/resolve.c
@@ -0,0 +1,161 @@
+/* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* tests/resolve/resolve.c */
+/*
+ * Copyright 1995 by the Massachusetts Institute of Technology.
+ * All Rights Reserved.
+ *
+ * Export of this software from the United States of America may
+ *   require a specific license from the United States Government.
+ *   It is the responsibility of any person or organization contemplating
+ *   export to obtain such a license before exporting.
+ *
+ * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
+ * distribute this software and its documentation for any purpose and
+ * without fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright notice and
+ * this permission notice appear in supporting documentation, and that
+ * the name of M.I.T. not be used in advertising or publicity pertaining
+ * to distribution of the software without specific, written prior
+ * permission.  Furthermore if you modify this software you must label
+ * your software as modified software and not distribute it in such a
+ * fashion that it might be confused with the original M.I.T. software.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose.  It is provided "as is" without express
+ * or implied warranty.
+ */
+
+/*
+ * A simple program to test the functionality of the resolver library.
+ * It simply will try to get the IP address of the host, and then look
+ * up the name from the address. If the resulting name does not contain the
+ * domain name, then the resolve library is broken.
+ *
+ * Warning: It is possible to fool this program into thinking everything is
+ * alright by a clever use of /etc/hosts - but this is better than nothing.
+ *
+ * Usage:
+ *   resolve [hostname]
+ *
+ *   When invoked with no arguments, gethostname is used for the local host.
+ *
+ */
+
+/* This program tests the resolve library and sees if it is broken... */
+
+#include "autoconf.h"
+#include <stdio.h>
+
+#if STDC_HEADERS
+#include <string.h>
+#else
+#ifndef HAVE_STRCHR
+#define strchr index
+#endif
+char *strchr();
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_SYS_SOCKET_H
+#include <sys/socket.h>
+#endif
+
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include <netinet/in.h>
+#include <netdb.h>
+
+int
+main(argc, argv)
+    int argc;
+    char **argv;
+{
+    char myname[MAXHOSTNAMELEN+1];
+    char *ptr, *fqdn;
+    struct in_addr addrcopy;
+    struct hostent *host;
+    int quiet = 0;
+
+    argc--; argv++;
+    while (argc) {
+        if ((strcmp(*argv, "--quiet") == 0) ||
+            (strcmp(*argv, "-q") == 0)) {
+            quiet++;
+        } else
+            break;
+        argc--; argv++;
+    }
+
+    if (argc >= 1) {
+        strncpy(myname, *argv, MAXHOSTNAMELEN);
+    } else {
+        if(gethostname(myname, MAXHOSTNAMELEN)) {
+            perror("gethostname failure");
+            exit(1);
+        }
+    }
+
+    myname[MAXHOSTNAMELEN] = '\0';  /* for safety */
+
+    /* Look up the address... */
+    if (!quiet)
+        printf("Hostname:  %s\n", myname);
+
+
+    /* Set the hosts db to close each time - effectively rewinding file */
+    sethostent(0);
+
+    if((host = gethostbyname (myname)) == NULL) {
+        fprintf(stderr,
+                "Could not look up address for hostname '%s' - fatal\n",
+                myname);
+        exit(2);
+    }
+
+    fqdn = strdup(host->h_name);
+    if (fqdn == NULL) {
+        perror("strdup");
+        exit(2);
+    }
+
+    ptr = host->h_addr_list[0];
+#define UC(a) (((int)a)&0xff)
+    if (!quiet)
+        printf("Host address: %d.%d.%d.%d\n",
+               UC(ptr[0]), UC(ptr[1]), UC(ptr[2]), UC(ptr[3]));
+
+    memcpy(&addrcopy.s_addr, ptr, 4);
+
+    /* Convert back to full name */
+    if ((host = gethostbyaddr(&addrcopy.s_addr, 4, AF_INET)) == NULL) {
+        if (!quiet)
+            fprintf(stderr, "Error looking up IP address\n");
+    } else {
+        free(fqdn);
+        fqdn = strdup(host->h_name);
+        if (fqdn == NULL) {
+            perror("strdup");
+            exit (2);
+        }
+    }
+
+    if (quiet)
+        printf("%s\n", fqdn);
+    else
+        printf("FQDN: %s\n", fqdn);
+
+    if (!quiet)
+        printf("Resolve library appears to have passed the test\n");
+
+    /* All ok */
+    exit(0);
+
+}