Added the --experimental option

CHANGES

@@ -1,5 +1,9 @@
 
-####################### V 1.7.4.5:
+Features:
+	Added the --experimental option that enables use of features that might
+	change in the future.
+
+####################### V 1.7.4.5 (not released):
 
 Corrections:
 	On connect() failure and in some other situations Socat tries to get

VERSION

@@ -1 +1 @@
-"1.7.4.5"
+"1.7.4.5+"

doc/socat.yo

@@ -118,6 +118,9 @@ dit(bf(tt(-d -d -d -d))) Prints fatal, error, warning, notice, info, and debug
    messages. 
 dit(bf(tt(-D)))
    Logs information about file descriptors before starting the transfer phase.
+dit(bf(tt(--experimental)))
+   New features that are not well tested or are subject to change in the future
+   must me explicitely enabled using this option.
 dit(bf(tt(-ly[<facility>])))
    Writes messages to syslog instead of stderr; severity as defined with -d
    option. With optional link(<facility>)(TYPE_FACILITY), the syslog type can

socat.c

@@ -264,8 +264,9 @@ int main(int argc, const char *argv[]) {
 	    }
 	 }
 	 break;
-      case 'W': if (socat_opts.lock.lockfile)
+      case 'W': if (socat_opts.lock.lockfile) {
 	    Error("only one -L and -W option allowed");
+	 }
 	 if (arg1[0][2]) {
 	    socat_opts.lock.lockfile = *arg1+2;
 	 } else {
@@ -291,6 +292,13 @@ int main(int argc, const char *argv[]) {
 	 xioopts.preferred_ip = arg1[0][1];
 	 break;
 #endif /* WITH_IP4 || WITH_IP6 */
+      case '-':
+	 if (!strcmp("experimental", &arg1[0][2])) {
+	    xioopts.experimental = true;
+	 } else {
+	    Error1("unknown option \"%s\"; use option \"-h\" for help", arg1[0]);
+	 }
+	 break;
       case '\0':
       case ',':
       case ':':
@@ -389,6 +397,7 @@ void socat_usage(FILE *fd) {
 #if WITH_FILAN
    fputs("      -D     analyze file descriptors before loop\n", fd);
 #endif
+   fputs("      --experimental enable experimental features\n", fd);
    fputs("      -ly[facility]  log to syslog, using facility (default is daemon)\n", fd);
    fputs("      -lf<logfile>   log to file\n", fd);
    fputs("      -ls            log to stderr (default if no other log)\n", fd);

xio-readline.c

@@ -30,8 +30,7 @@ static int xioopen_readline(int argc, const char *argv[], struct opt *opts,
 			    int dummy1, int dummy2, int dummy3);
 
 
-const struct addrdesc addr_readline = {
-   "readline", 3, xioopen_readline, GROUP_FD|GROUP_TERMIOS|GROUP_READLINE, 0, 0, 0 HELP(NULL) };
+const struct addrdesc addr_readline = { "readline", 3, xioopen_readline, GROUP_FD|GROUP_TERMIOS|GROUP_READLINE, 0, 0, 0 HELP(NULL) };
 
 const struct optdesc opt_history_file = { "history-file", "history", OPT_HISTORY_FILE, GROUP_READLINE, PH_LATE, TYPE_STRING, OFUNC_OFFSET, XIO_OFFSETOF(para.readline.history_file) };
 const struct optdesc opt_prompt       = { "prompt",       NULL,      OPT_PROMPT,       GROUP_READLINE, PH_LATE, TYPE_STRING, OFUNC_OFFSET, XIO_OFFSETOF(para.readline.prompt) };

xio.h

@@ -102,6 +102,7 @@ typedef struct {
    char default_ip;	/* default prot.fam for IP based listen ('4' or '6') */
    char preferred_ip;	/* preferred prot.fam. for name resolution ('0' for
 			   unspecified, '4', or '6') */
+   bool experimental;	/* enable some features */
 } xioopts_t;
 
 /* pack the description of a lock file */

xioparam.c

@@ -20,7 +20,8 @@ xioopts_t xioopts = {
    '\0',	/* logopt */
    NULL,	/* syslogfac */
    '4',		/* default_ip */
-   '4'		/* preferred_ip */
+   '4',		/* preferred_ip */
+   false 	/* experimental */
 } ;