Adding a "--dry-run" commandline option

Hi all,

(I am non-subscribed poster)

One of the components of the freedombox project is the privoxy with
updated frequently from Adblock-plus and https_everywhere
projects. 

http://www.freedomboxfoundation.org/news/freedombox-privoxy/

Give the frequent updates, it is most useful if privoxy had a
way to validate the rules so that one could recover if failure.


Please consider the following patch (tested on Linux only)

diff --git a/jcc.c b/jcc.c
index 721d187..3cbdc3d 100644
--- a/jcc.c
+++ b/jcc.c
@@ -2700,7 +2700,7 @@ static void usage(const char *myname)
 #if defined(unix)
           "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup
hostname] [--user user[.group]] "
 #endif /* defined(unix) */
-          "[--version] [configfile]\n"
+          "[--version] [--dry-run] [configfile]\n"
           "Aborting\n", myname);
 
    exit(2);
@@ -2883,6 +2883,7 @@ int main(int argc, char **argv)
 {
    int argc_pos = 0;
    unsigned int random_seed;
+   int do_dry_run = 0;
 #ifdef unix
    struct passwd *pw = NULL;
    struct group *grp = NULL;
@@ -2954,6 +2955,11 @@ int main(int argc, char **argv)
          exit(0);
       }
 
+      else if (strcmp(argv[argc_pos], "--dry-run") == 0)
+      {
+         do_dry_run = 1;
+      }
+
 #if defined(unix)
 
       else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
@@ -3072,6 +3078,15 @@ int main(int argc, char **argv)
    files->next = NULL;
    clients->next = NULL;
 
+   if (do_dry_run) {
+      if (load_config()) {
+         return EXIT_SUCCESS;
+      } 
+      else {
+         return EXIT_FAILURE;
+      }
+   } /* not reached if dry_run */
+
    /* XXX: factor out initialising after the next stable release. */
 #ifdef AMIGA
    InitAmiga();



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