From 9a62f3a6b9dd1bb0f675edd50af64ee8ee50ab39 Mon Sep 17 00:00:00 2001
From: Russ Allbery <rra@stanford.edu>
Date: Thu, 17 Aug 2006 03:17:01 +0000
Subject: Initial very simple wallet client program.

---
 client/wallet.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 client/wallet.c

(limited to 'client/wallet.c')

diff --git a/client/wallet.c b/client/wallet.c
new file mode 100644
index 0000000..6106651
--- /dev/null
+++ b/client/wallet.c
@@ -0,0 +1,118 @@
+/*  $Id$
+**
+**  The client program for the wallet system.
+**
+**  Written by Russ Allbery <rra@stanford.edu>
+**  Copyright 2006 Board of Trustees, Leland Stanford Jr. University
+**
+**  See README for licensing terms.
+*/
+
+#include <config.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <remctl.h>
+
+/* Temporary until we have some real configuration. */
+#ifndef SERVER
+# define SERVER "wallet.stanford.edu"
+#endif
+#ifndef PORT
+# define PORT 4444
+#endif
+
+/* Usage message. */
+static const char usage_message[] = "\
+Usage: wallet (get|show) keytab <name>\n\
+\n\
+Options:\n\
+    -h            Display this help\n\
+    -v            Display the version of remctl\n";
+
+
+/*
+**  Display the usage message for remctl.
+*/
+static void
+usage(int status)
+{
+    fprintf((status == 0) ? stdout : stderr, "%s", usage_message);
+    exit(status);
+}
+
+
+/*
+**  Main routine.  Parse the arguments and then perform the desired
+**  operation.
+*/
+int
+main(int argc, char *argv[])
+{
+    int option, fd;
+    ssize_t status;
+    const char *command[3];
+    struct remctl_result *result;
+
+    while ((option = getopt(argc, argv, "hv")) != EOF) {
+        switch (option) {
+        case 'h':
+            usage(0);
+            break;
+        case 'v':
+            printf("%s\n", PACKAGE_STRING);
+            exit(0);
+            break;
+        default:
+            usage(1);
+            break;
+        }
+    }
+    argc -= optind;
+    argv += optind;
+    if (argc != 3)
+        usage(1);
+    if (strcmp(argv[1], "keytab") != 0)
+        usage(1);
+
+    /* Perform the desired operation based on the first argument. */
+    if (strcmp(argv[0], "get") == 0) {
+        command[0] = "get";
+    } else if (strcmp(argv[0], "show") == 0) {
+        command[0] = "show";
+    }
+    command[1] = "keytab";
+    command[2] = argv[2];
+    result = remctl(SERVER, PORT, NULL, command);
+
+    /* Display the results. */
+    if (result->error != NULL) {
+        fprintf(stderr, "%s\n", result->error);
+    } else if (result->stderr_len > 0) {
+        fwrite(result->stderr_buf, 1, result->stderr_len, stderr);
+    } else {
+        fd = open("keytab", O_WRONLY | O_CREAT | O_TRUNC, 0600);
+        if (fd < 0) {
+            fprintf(stderr, "open of keytab failed: %s", strerror(errno));
+            exit(1);
+        }
+        status = write(fd, result->stdout_buf, result->stdout_len);
+        if (status < 0) {
+            fprintf(stderr, "write to keytab failed: %s", strerror(errno));
+            exit(1);
+        } else if (status != result->stdout_len) {
+            fprintf(stderr, "write to keytab truncated");
+            exit(1);
+        }
+        if (close(fd) < 0) {
+            fprintf(stderr, "close of keytab failed: %s", strerror(errno));
+            exit(1);
+        }
+    }
+    exit(result->status);
+}
-- 
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