A few small improvements to get to v1.1

They are:
 - Put the version number in the usage string and the man page
 - Improved the efficiency of pulling the command out of argv
 - Check for /dev/urandom via autoconf so that you don't build
   the program it it's not going to work anyway.

NEWS

@@ -1,10 +1,15 @@
 N E W S
 -------
 
+2020-06-20
+
+  Version 1.1 Put the program version in the usage string.  Also
+  improved argument handling efficiency.
+
 2020-06-19
 
-  Put encryption and rekey functions into the program.  Added a 
-  man page with example usage.
+  Version 1.0 Put encryption and rekey functions into the program.
+  Added a man page with example usage.
 
 2020-06-17
 

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.69])
-AC_INIT([spritz], [1.0], [https://github.com/rwtodd/spritz_cipher])
+AC_INIT([spritz], [1.1], [https://github.com/rwtodd/spritz_cipher])
 AC_CONFIG_SRCDIR([src/b64.c])
 AC_CONFIG_HEADERS([src/config.h])
 
@@ -36,5 +36,9 @@ AC_CHECK_FUNCS([memset],
                [],
 	       AC_MSG_ERROR([Missing required stdlib function!]))
 
-AC_CONFIG_FILES([Makefile])
+# we need /dev/urandom to exist...
+AC_CHECK_FILE([/dev/urandom],[],
+   AC_MSG_ERROR([This program requires /dev/urandom to exist on your system.]))
+
+AC_CONFIG_FILES([Makefile spritz.1])
 AC_OUTPUT

spritz.1 → spritz.1.in

@@ -1,4 +1,4 @@
-.TH spritz "1" "19 February 2020" "" "Utility"
+.TH spritz "1" "19 February 2020" "@PACKAGE_STRING@" "Utility"
 
 .SH NAME
 spritz \- compute hashes and encrypt via the spritz streaming cipher

src/main.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include <string.h>
 #include <stdio.h>
 
@@ -16,11 +17,11 @@ main (int argc, char **argv)
 
   if (argc >= 2)
     {
-      /* peel off the command, and shift up the rest of the args */
+      /* remove the command from the argument list */
       cmd = argv[1];
-      for (int i = 2; i < argc; ++i)
-        argv[i - 1] = argv[i];
+      argv[1] = argv[0];
       --argc;
+      ++argv;
     }
 
   if (!strcmp (cmd, "hash"))
@@ -34,7 +35,8 @@ main (int argc, char **argv)
   /* print usage if we didn't find a command to run */
   if (cmd_func == NULL)
     {
-      fputs ("Usage: spritz hash [-h] [-s size] [file1 file2 ...]\n"
+      fputs (PACKAGE_STRING "\n", stderr);
+      fputs ("Usage: spritz hash  [-h] [-s size] [file1 file2 ...]\n"
              "       spritz crypt [-d] [-p pwd] [file]\n"
              "       spritz crypt -n [-p pwd] [file1 file2 ...]\n"
              "       spritz rekey [-o oldpwd] [-n newpwd] file1 file2 ...\n\n",