X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/7440fd4419acfc9c784f142fb9dee3e64c9a18c2..05bea829b8868f5db4ac048897e944ed05dfc457:/plink.c

diff --git a/plink.c b/plink.c
index b46c5d6b..f6e2a702 100644
--- a/plink.c
+++ b/plink.c
@@ -1,5 +1,5 @@
 /*
- * PLink - a command-line (stdin/stdout) variant of PuTTY.
+ * PLink - a Windows command-line (stdin/stdout) variant of PuTTY.
  */
 
 #include <stdio.h>
@@ -210,21 +210,23 @@ static void usage(void)
     printf("Usage: plink [options] [user@]host [command]\n");
     printf("       (\"host\" can also be a PuTTY saved session name)\n");
     printf("Options:\n");
+    printf("  -V        print version information\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("            force use of a particular protocol\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("  -D listen-port   Dynamic SOCKS-based port forwarding\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("  -D [listen-IP:]listen-port\n");
+    printf("            Dynamic SOCKS-based port forwarding\n");
+    printf("  -L [listen-IP:]listen-port:host:port\n");
+    printf("            Forward local port to remote address\n");
+    printf("  -R [listen-IP:]listen-port:host:port\n");
+    printf("            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");
@@ -235,6 +237,12 @@ static void usage(void)
     exit(1);
 }
 
+static void version(void)
+{
+    printf("plink: %s\n", ver);
+    exit(1);
+}
+
 char *do_select(SOCKET skt, int startup)
 {
     int events;
@@ -287,6 +295,7 @@ int main(int argc, char **argv)
      * Process the command line.
      */
     do_defaults(NULL, &cfg);
+    loaded_session = FALSE;
     default_protocol = cfg.protocol;
     default_port = cfg.port;
     errors = 0;
@@ -325,6 +334,8 @@ int main(int argc, char **argv)
 	    } else if (!strcmp(p, "-s")) {
 		/* Save status to write to cfg later. */
 		use_subsystem = 1;
+	    } else if (!strcmp(p, "-V")) {
+                version();
 	    } else {
 		fprintf(stderr, "plink: unknown option \"%s\"\n", p);
 		errors = 1;
@@ -357,7 +368,7 @@ int main(int argc, char **argv)
 		    strncpy(cfg.host, q, sizeof(cfg.host) - 1);
 		    cfg.host[sizeof(cfg.host) - 1] = '\0';
 		} else {
-		    char *r;
+		    char *r, *user, *host;
 		    /*
 		     * Before we process the [user@]host string, we
 		     * first check for the presence of a protocol
@@ -381,41 +392,48 @@ int main(int argc, char **argv)
 		    }
 
 		    /*
-		     * Three cases. Either (a) there's a nonzero
-		     * length string followed by an @, in which
-		     * case that's user and the remainder is host.
-		     * Or (b) there's only one string, not counting
-		     * a potential initial @, and it exists in the
-		     * saved-sessions database. Or (c) only one
-		     * string and it _doesn't_ exist in the
-		     * database.
+		     * A nonzero length string followed by an @ is treated
+		     * as a username. (We discount an _initial_ @.) The
+		     * rest of the string (or the whole string if no @)
+		     * is treated as a session name and/or hostname.
 		     */
 		    r = strrchr(p, '@');
 		    if (r == p)
 			p++, r = NULL; /* discount initial @ */
-		    if (r == NULL) {
-			/*
-			 * One string.
-			 */
+		    if (r) {
+			*r++ = '\0';
+			user = p, host = r;
+		    } else {
+			user = NULL, host = p;
+		    }
+
+		    /*
+		     * Now attempt to load a saved session with the
+		     * same name as the hostname.
+		     */
+		    {
 			Config cfg2;
-			do_defaults(p, &cfg2);
-			if (cfg2.host[0] == '\0') {
+			do_defaults(host, &cfg2);
+			if (loaded_session || cfg2.host[0] == '\0') {
 			    /* No settings for this host; use defaults */
-			    strncpy(cfg.host, p, sizeof(cfg.host) - 1);
+			    /* (or session was already loaded with -load) */
+			    strncpy(cfg.host, host, sizeof(cfg.host) - 1);
 			    cfg.host[sizeof(cfg.host) - 1] = '\0';
 			    cfg.port = default_port;
 			} else {
 			    cfg = cfg2;
+			    /* Ick: patch up internal pointer after copy */
 			    cfg.remote_cmd_ptr = cfg.remote_cmd;
 			}
-		    } else {
-			*r++ = '\0';
-			strncpy(cfg.username, p, sizeof(cfg.username) - 1);
+		    }
+
+		    if (user) {
+			/* Patch in specified username. */
+			strncpy(cfg.username, user,
+				sizeof(cfg.username) - 1);
 			cfg.username[sizeof(cfg.username) - 1] = '\0';
-			strncpy(cfg.host, r, sizeof(cfg.host) - 1);
-			cfg.host[sizeof(cfg.host) - 1] = '\0';
-			cfg.port = default_port;
 		    }
+
 		}
 	    } else {
 		char *command;
@@ -466,7 +484,7 @@ int main(int argc, char **argv)
 
     /* See if host is of the form user@host */
     if (cfg.host[0] != '\0') {
-	char *atsign = strchr(cfg.host, '@');
+	char *atsign = strrchr(cfg.host, '@');
 	/* Make sure we're not overflowing the user field */
 	if (atsign) {
 	    if (atsign - cfg.host < sizeof cfg.username) {
@@ -554,7 +572,7 @@ int main(int argc, char **argv)
 	    (GetFileType(GetStdHandle(STD_INPUT_HANDLE)) == FILE_TYPE_CHAR);
 
 	error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port,
-			   &realhost, nodelay);
+			   &realhost, nodelay, cfg.tcp_keepalives);
 	if (error) {
 	    fprintf(stderr, "Unable to open connection:\n%s", error);
 	    return 1;