keyword expansion for localcommand. ok djm@

2 files changed, 40 insertions, 9 deletions

diff --git a/usr.bin/ssh/ssh.c b/usr.bin/ssh/ssh.c
index 0ab82f3a837..85221074b63 100644
--- a/usr.bin/ssh/ssh.c
+++ b/usr.bin/ssh/ssh.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh.c,v 1.316 2008/06/12 04:24:06 djm Exp $ */
+/* $OpenBSD: ssh.c,v 1.317 2008/06/12 16:35:31 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -632,6 +632,28 @@ main(int ac, char **av)
 	if (options.user == NULL)
 		options.user = xstrdup(pw->pw_name);
 
+	/* Get default port if port has not been set. */
+	if (options.port == 0) {
+		sp = getservbyname(SSH_SERVICE_NAME, "tcp");
+		options.port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
+	}
+
+	if (options.local_command != NULL) {
+		char thishost[NI_MAXHOST];
+
+		if (gethostname(thishost, sizeof(thishost)) == -1)
+			fatal("gethostname: %s", strerror(errno));
+		snprintf(buf, sizeof(buf), "%d", options.port);
+		debug3("expanding LocalCommand: %s", options.local_command);
+		cp = options.local_command;
+		options.local_command = percent_expand(cp, "d", pw->pw_dir,
+		    "h", options.hostname? options.hostname : host,
+                    "l", thishost, "n", host, "r", options.user, "p", buf,
+                    "u", pw->pw_name, (char *)NULL);
+		debug3("expanded LocalCommand: %s", options.local_command);
+		xfree(cp);
+	}
+
 	if (options.hostname != NULL)
 		host = options.hostname;
 
@@ -642,12 +664,6 @@ main(int ac, char **av)
 				*p = (char)tolower(*p);
 	}
 
-	/* Get default port if port has not been set. */
-	if (options.port == 0) {
-		sp = getservbyname(SSH_SERVICE_NAME, "tcp");
-		options.port = sp ? ntohs(sp->s_port) : SSH_DEFAULT_PORT;
-	}
-
 	if (options.proxy_command != NULL &&
 	    strcmp(options.proxy_command, "none") == 0) {
 		xfree(options.proxy_command);
diff --git a/usr.bin/ssh/ssh_config.5 b/usr.bin/ssh/ssh_config.5
index 8bcf323cc25..98cd9ac5b58 100644
--- a/usr.bin/ssh/ssh_config.5
+++ b/usr.bin/ssh/ssh_config.5
@@ -34,8 +34,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: ssh_config.5,v 1.108 2008/06/11 23:03:56 grunk Exp $
-.Dd $Mdocdate: June 11 2008 $
+.\" $OpenBSD: ssh_config.5,v 1.109 2008/06/12 16:35:31 dtucker Exp $
+.Dd $Mdocdate: June 12 2008 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -606,6 +606,21 @@ Specifies a command to execute on the local machine after successfully
 connecting to the server.
 The command string extends to the end of the line, and is executed with
 the user's shell.
+The following escape character substitutions will be performed:
+.Ql %d
+(local user's home directory),
+.Ql %h
+(remote host name),
+.Ql %l
+(local host name),
+.Ql %n
+(host name as provided on the command line),
+.Ql %p
+(remote port),
+.Ql %r
+(remote user name) or
+.Ql %u
+(local user name).
 This directive is ignored unless
 .Cm PermitLocalCommand
 has been enabled.