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List:       openssh-commits
Subject:    [openssh-commits] [openssh] 01/04: upstream: Add %-TOKEN, environment variable and tilde expansion t
From:       git+noreply () mindrot ! org
Date:       2020-07-17 3:53:10
Message-ID: a00019a990162727 () fuyu ! mindrot ! org
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djm pushed a commit to branch master
in repository openssh.

commit c4f239944a4351810fd317edf408bdcd5c0102d9
Author: dtucker@openbsd.org <dtucker@openbsd.org>
Date:   Fri Jul 17 03:23:10 2020 +0000

    upstream: Add %-TOKEN, environment variable and tilde expansion to
    
    UserKnownHostsFile, allowing the file to be automagically split up in the
    configuration (eg bz#1654).  ok djm@, man page parts jmc@
    
    OpenBSD-Commit-ID: 7e1b406caf147638bb51558836a72d6cc0bd1b18
---
 ssh.c        | 18 +++++++++++++++++-
 ssh_config.5 | 18 +++++++++++++-----
 2 files changed, 30 insertions(+), 6 deletions(-)

diff --git a/ssh.c b/ssh.c
index b13783d4..5c93c3d2 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh.c,v 1.531 2020/07/05 23:59:45 djm Exp $ */
+/* $OpenBSD: ssh.c,v 1.532 2020/07/17 03:23:10 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -654,6 +654,7 @@ main(int ac, char **av)
 	struct Forward fwd;
 	struct addrinfo *addrs = NULL;
 	size_t n, len;
+	u_int j;
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
@@ -1427,6 +1428,21 @@ main(int ac, char **av)
 		options.forward_agent_sock_path = cp;
 	}
 
+	for (j = 0; j < options.num_user_hostfiles; j++) {
+		if (options.user_hostfiles[j] != NULL) {
+			cp = tilde_expand_filename(options.user_hostfiles[j],
+			    getuid());
+			p = default_client_percent_dollar_expand(cp,
+			    pw->pw_dir, host, options.user, pw->pw_name);
+			if (strcmp(options.user_hostfiles[j], p) != 0)
+				debug3("expanded UserKnownHostsFile '%s' -> "
+				    "'%s'", options.user_hostfiles[j], p);
+			free(options.user_hostfiles[j]);
+			free(cp);
+			options.user_hostfiles[j] = p;
+		}
+	}
+
 	for (i = 0; i < options.num_local_forwards; i++) {
 		if (options.local_forwards[i].listen_path != NULL) {
 			cp = options.local_forwards[i].listen_path;
diff --git a/ssh_config.5 b/ssh_config.5
index d5c561a1..fce59d13 100644
--- a/ssh_config.5
+++ b/ssh_config.5
@@ -33,8 +33,8 @@
 .\" (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 1.328 2020/05/29 05:48:39 jmc Exp $
-.Dd $Mdocdate: May 29 2020 $
+.\" $OpenBSD: ssh_config.5,v 1.329 2020/07/17 03:23:10 dtucker Exp $
+.Dd $Mdocdate: July 17 2020 $
 .Dt SSH_CONFIG 5
 .Os
 .Sh NAME
@@ -1738,6 +1738,12 @@ having to remember to give the user name on the command line.
 .It Cm UserKnownHostsFile
 Specifies one or more files to use for the user
 host key database, separated by whitespace.
+Each filename may use tilde notation to refer to the user's home directory,
+the tokens described in the
+.Sx TOKENS
+section and environment variables as described in the
+.Sx ENVIRONMENT VARIABLES
+section.
 The default is
 .Pa ~/.ssh/known_hosts ,
 .Pa ~/.ssh/known_hosts2 .
@@ -1874,8 +1880,9 @@ The local username.
 .Cm LocalForward ,
 .Cm Match exec ,
 .Cm RemoteCommand ,
+.Cm RemoteForward ,
 and
-.Cm RemoteForward
+.Com UserKnownHostsFile
 accept the tokens %%, %C, %d, %h, %i, %L, %l, %n, %p, %r, and %u.
 .Pp
 .Cm Hostname
@@ -1899,9 +1906,10 @@ returned and the setting for that keyword will be ignored.
 The keywords
 .Cm CertificateFile ,
 .Cm ControlPath ,
-.Cm IdentityAgent
-and
+.Cm IdentityAgent ,
 .Cm IdentityFile
+and
+.Cm UserKnownHostsFile
 support environment variables.
 The keywords
 .Cm LocalForward

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