- dtucker@cvs.openbsd.org 2013/04/07 02:10:33

     [log.c log.h ssh.1 ssh.c sshd.8 sshd.c]
     Add -E option to ssh and sshd to append debugging logs to a specified file
     instead of stderr or syslog.  ok markus@, man page help jmc@

1 files changed, 20 insertions, 8 deletions

diff --git a/ssh.c b/ssh.c
index b50fca38f..cd56f8a74 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh.c,v 1.374 2013/03/08 06:32:58 djm Exp $ */
+/* $OpenBSD: ssh.c,v 1.375 2013/04/07 02:10:33 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -197,8 +197,8 @@ usage(void)
 {
         fprintf(stderr,
 "usage: ssh [-1246AaCfgKkMNnqsTtVvXxYy] [-b bind_address] [-c cipher_spec]\n"
-"           [-D [bind_address:]port] [-e escape_char] [-F configfile]\n"
-"           [-I pkcs11] [-i identity_file]\n"
+"           [-D [bind_address:]port] [-E log_file] [-e escape_char]\n"
+"           [-F configfile] [-I pkcs11] [-i identity_file]\n"
 "           [-L [bind_address:]port:host:hostport]\n"
 "           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]\n"
 "           [-R [bind_address:]port:host:hostport] [-S ctl_path]\n"
@@ -238,7 +238,7 @@ int
 main(int ac, char **av)
 {
         int i, r, opt, exit_status, use_syslog;
-        char *p, *cp, *line, *argv0, buf[MAXPATHLEN], *host_arg;
+        char *p, *cp, *line, *argv0, buf[MAXPATHLEN], *host_arg, *logfile;
         char thishost[NI_MAXHOST], shorthost[NI_MAXHOST], portstr[NI_MAXSERV];
         struct stat st;
         struct passwd *pw;
@@ -322,11 +322,12 @@ main(int ac, char **av)
         /* Parse command-line arguments. */
         host = NULL;
         use_syslog = 0;
+        logfile = NULL;
         argv0 = av[0];
 
  again:
         while ((opt = getopt(ac, av, "1246ab:c:e:fgi:kl:m:no:p:qstvx"
-            "ACD:F:I:KL:MNO:PR:S:TVw:W:XYy")) != -1) {
+            "ACD:E:F:I:KL:MNO:PR:S:TVw:W:XYy")) != -1) {
                 switch (opt) {
                 case '1':
                         options.protocol = SSH_PROTO_1;
@@ -356,6 +357,9 @@ main(int ac, char **av)
                 case 'y':
                         use_syslog = 1;
                         break;
+                case 'E':
+                        logfile = xstrdup(optarg);
+                        break;
                 case 'Y':
                         options.forward_x11 = 1;
                         options.forward_x11_trusted = 1;
@@ -427,9 +431,8 @@ main(int ac, char **av)
                         } else {
                                 if (options.log_level < SYSLOG_LEVEL_DEBUG3)
                                         options.log_level++;
-                                break;
                         }
-                        /* FALLTHROUGH */
+                        break;
                 case 'V':
                         fprintf(stderr, "%s, %s\n",
                             SSH_RELEASE, SSLeay_version(SSLEAY_VERSION));
@@ -663,12 +666,21 @@ main(int ac, char **av)
 
         /*
          * Initialize "log" output.  Since we are the client all output
-         * actually goes to stderr.
+         * goes to stderr unless otherwise specified by -y or -E.
          */
+        if (use_syslog && logfile != NULL)
+                fatal("Can't specify both -y and -E");
+        if (logfile != NULL) {
+                log_redirect_stderr_to(logfile);
+                xfree(logfile);
+        }
         log_init(argv0,
             options.log_level == -1 ? SYSLOG_LEVEL_INFO : options.log_level,
             SYSLOG_FACILITY_USER, !use_syslog);
 
+        if (debug_flag)
+                logit("%s, %s", SSH_VERSION, SSLeay_version(SSLEAY_VERSION));
+
         /*
          * Read per-user configuration file.  Ignore the system wide config
          * file if the user specifies a config file on the command line.