Changeset 8f335a8

Timestamp:

Apr 19, 2013, 3:22:54 AM (11 years ago)

Author:

Anders Kaseorg <andersk@mit.edu>

Branches:

master, release-1.10

Children:

0625919

Parents:

5175cf8

git-author:

Anders Kaseorg <andersk@mit.edu> (04/10/13 00:19:44)

git-committer:

Anders Kaseorg <andersk@mit.edu> (04/19/13 03:22:54)

Message:

zcrypt: Accept --help

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

File:

• zcrypt.c (modified) (5 diffs)

zcrypt.c

@@ -16 +16 @@
 #include <sys/wait.h>
 #include <ctype.h>
+#include <limits.h>
 #include <getopt.h>
 
@@ -117 +118 @@
 }
 
+void usage(FILE *file, const char *progname)
+{
+  fprintf(file, "Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", progname);
+  fprintf(file, "       [-advqtluon] [-s signature] [-f arg] [-m message]\n");
+  fprintf(file, "  One or more of class, instance, and keyfile must be specified.\n");
+}
+
 int main(int argc, char *argv[])
 {
@@ -135 +143 @@
   enum {
     OPT_VERSION = CHAR_MAX + 1,
+    OPT_HELP,
   };
   static const struct option options[] = {
     {"version", no_argument, NULL, OPT_VERSION},
+    {"help", no_argument, NULL, OPT_HELP},
     {NULL, 0, NULL, 0}
   };
@@ -148 +158 @@
         /* Version */
         printf("This is zcrypt version %s\n", OWL_VERSION_STRING);
+        exit(0);
+      case OPT_HELP:
+        /* Help */
+        usage(stdout, argv[0]);
         exit(0);
       case 'Z':
@@ -280 +294 @@
   if (error || !cryptspec)
   {
-    fprintf(stderr, "Usage: %s [-Z|-D|-E|-R|-S] [-F Keyfile] [-c class] [-i instance]\n", argv[0]);
-    fprintf(stderr, "       [-advqtluon] [-s signature] [-f arg] [-m message]\n");
-    fprintf(stderr, "  One or more of class, instance, and keyfile must be specified.\n");
+    usage(stderr, argv[0]);
     exit(1);
   }