X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/9e164d82c8990d3c8cff58d866fb9938907d4d7b..a197b71101b0fb9381f9ffbaf36329e430215ef1:/windows/winplink.c

diff --git a/windows/winplink.c b/windows/winplink.c
index 60232ffe..7eb3aec1 100644
--- a/windows/winplink.c
+++ b/windows/winplink.c
@@ -166,7 +166,7 @@ static void usage(void)
     printf("  -pgpfp    print PGP key fingerprints and exit\n");
     printf("  -v        show verbose messages\n");
     printf("  -load sessname  Load settings from saved session\n");
-    printf("  -ssh -telnet -rlogin -raw\n");
+    printf("  -ssh -telnet -rlogin -raw -serial\n");
     printf("            force use of a particular protocol\n");
     printf("  -P port   connect to specified port\n");
     printf("  -l user   connect with specified username\n");
@@ -193,6 +193,8 @@ static void usage(void)
     printf("  -N        don't start a shell/command (SSH-2 only)\n");
     printf("  -nc host:port\n");
     printf("            open tunnel in place of session (SSH-2 only)\n");
+    printf("  -sercfg configuration-string (e.g. 19200,8,n,1,X)\n");
+    printf("            Specify the serial configuration (serial only)\n");
     exit(1);
 }
 
@@ -279,6 +281,7 @@ int main(int argc, char **argv)
     int skcount, sksize;
     int exitcode;
     int errors;
+    int got_host = FALSE;
     int use_subsystem = 0;
     long now, next;
 
@@ -305,7 +308,6 @@ int main(int argc, char **argv)
 	 * Override the default protocol if PLINK_PROTOCOL is set.
 	 */
 	char *p = getenv("PLINK_PROTOCOL");
-	int i;
 	if (p) {
 	    const Backend *b = backend_from_name(p);
 	    if (b) {
@@ -342,7 +344,7 @@ int main(int argc, char **argv)
 		errors = 1;
 	    }
 	} else if (*p) {
-	    if (!cfg_launchable(&cfg)) {
+	    if (!cfg_launchable(&cfg) || !(got_host || loaded_session)) {
 		char *q = p;
 		/*
 		 * If the hostname starts with "telnet:", set the
@@ -368,6 +370,7 @@ int main(int argc, char **argv)
 			cfg.port = -1;
 		    strncpy(cfg.host, q, sizeof(cfg.host) - 1);
 		    cfg.host[sizeof(cfg.host) - 1] = '\0';
+		    got_host = TRUE;
 		} else {
 		    char *r, *user, *host;
 		    /*
@@ -416,8 +419,10 @@ int main(int argc, char **argv)
 			    strncpy(cfg.host, host, sizeof(cfg.host) - 1);
 			    cfg.host[sizeof(cfg.host) - 1] = '\0';
 			    cfg.port = default_port;
+			    got_host = TRUE;
 			} else {
 			    cfg = cfg2;
+			    loaded_session = TRUE;
 			}
 		    }
 
@@ -464,7 +469,7 @@ int main(int argc, char **argv)
     if (errors)
 	return 1;
 
-    if (!cfg_launchable(&cfg)) {
+    if (!cfg_launchable(&cfg) || !(got_host || loaded_session)) {
 	usage();
     }