printf("  -D listen-port   Dynamic SOCKS-based port forwarding\n");
static void usage(void){    printf("PuTTY Link: command-line connection utility\n");    printf("%s\n", ver);    printf("Usage: plink [options] [user@]host [command]\n");    printf("       (\"host\" can also be a PuTTY saved session name)\n");    printf("Options:\n");    printf("  -v        show verbose messages\n");    printf("  -load sessname  Load settings from saved session\n");    printf("  -ssh -telnet -rlogin -raw\n");    printf("            force use of a particular protocol (default SSH)\n");    printf("  -P port   connect to specified port\n");    printf("  -l user   connect with specified username\n");    printf("  -m file   read remote command(s) from file\n");    printf("  -batch    disable all interactive prompts\n");    printf("The following options only apply to SSH connections:\n");    printf("  -pw passw login with specified password\n");    printf("  -L listen-port:host:port   Forward local port to "	   "remote address\n");    printf("  -R listen-port:host:port   Forward remote port to"	   " local address\n");    printf("  -X -x     enable / disable X11 forwarding\n");    printf("  -A -a     enable / disable agent forwarding\n");    printf("  -t -T     enable / disable pty allocation\n");    printf("  -1 -2     force use of particular protocol version\n");    printf("  -C        enable compression\n");    printf("  -i key    private key file for authentication\n");    exit(1);}