add a -V flag to print the version, but mostly as a way to check

the binary is functional; ok deraadt@

usr.bin/ssh/ssh-agent.1

@@ -1,4 +1,4 @@
-.\" $OpenBSD: ssh-agent.1,v 1.86 2025/10/04 21:41:35 naddy Exp $
+.\" $OpenBSD: ssh-agent.1,v 1.87 2026/05/27 03:04:30 djm Exp $
 .\"
 .\" Author: Tatu Ylonen <ylo@cs.hut.fi>
 .\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -34,7 +34,7 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: October 4 2025 $
+.Dd $Mdocdate: May 27 2026 $
 .Dt SSH-AGENT 1
 .Os
 .Sh NAME
@@ -62,6 +62,8 @@
 .Fl k
 .Nm ssh-agent
 .Fl u
+.Nm ssh-agent
+.Fl V
 .Sh DESCRIPTION
 .Nm
 is a program to hold private keys used for public key authentication.
@@ -208,6 +210,8 @@ If a command (and optional arguments) is given,
 this is executed as a subprocess of the agent.
 The agent exits automatically when the command given on the command
 line terminates.
+.It Fl V
+Display the version number and exit.
 .El
 .Pp
 There are two main ways to get an agent set up.

usr.bin/ssh/ssh-agent.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-agent.c,v 1.325 2026/04/28 21:32:05 djm Exp $ */
+/* $OpenBSD: ssh-agent.c,v 1.326 2026/05/27 03:04:30 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -77,6 +77,7 @@
 #include "ssh-pkcs11.h"
 #include "sk-api.h"
 #include "myproposal.h"
+#include "version.h"
 
 #ifndef DEFAULT_ALLOWED_PROVIDERS
 # define DEFAULT_ALLOWED_PROVIDERS "/usr/lib*/*,/usr/local/lib*/*"
@@ -2253,7 +2254,7 @@ main(int ac, char **av)
 	if (getrlimit(RLIMIT_NOFILE, &rlim) == -1)
 		fatal("%s: getrlimit: %s", __progname, strerror(errno));
 
-	while ((ch = getopt(ac, av, "cDdksTuUE:a:O:P:t:")) != -1) {
+	while ((ch = getopt(ac, av, "cDdksTuUVE:a:O:P:t:")) != -1) {
 		switch (ch) {
 		case 'E':
 			fingerprint_hash = ssh_digest_alg_by_name(optarg);
@@ -2319,6 +2320,10 @@ main(int ac, char **av)
 		case 'U':
 			U_flag++;
 			break;
+		case 'V':
+			fprintf(stderr, "%s, %s\n",
+			    SSH_VERSION, SSH_OPENSSL_VERSION);
+			exit(0);
 		default:
 			usage();
 		}