- djm@cvs.openbsd.org 2010/01/30 02:54:53

[openssh.git] / sshlogin.c

diff --git a/sshlogin.c b/sshlogin.c
index e1cc4cc82ebef16866b81ce38e1c37b28d2d9b07..33bd652fb0b5f2be1dbc079b5986f3742e7fdc79 100644 (file)
--- a/sshlogin.c
+++ b/sshlogin.c
@@ -1,3 +1,4 @@
+/* $OpenBSD: sshlogin.c,v 1.26 2007/09/11 15:47:17 gilles Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -39,24 +40,82 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: sshlogin.c,v 1.7 2003/06/12 07:57:38 markus Exp $");
+
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
 
 #include "loginrec.h"
+#include "log.h"
+#include "buffer.h"
+#include "servconf.h"
+
+extern Buffer loginmsg;
+extern ServerOptions options;
 
 /*
  * Returns the time when the user last logged in.  Returns 0 if the
  * information is not available.  This must be called before record_login.
  * The host the user logged in from will be returned in buf.
  */
-u_long
+time_t
 get_last_login_time(uid_t uid, const char *logname,
-    char *buf, u_int bufsize)
+    char *buf, size_t bufsize)
 {
        struct logininfo li;
 
        login_get_lastlog(&li, uid);
        strlcpy(buf, li.hostname, bufsize);
-       return li.tv_sec;
+       return (time_t)li.tv_sec;
+}
+
+/*
+ * Generate and store last login message.  This must be done before
+ * login_login() is called and lastlog is updated.
+ */
+static void
+store_lastlog_message(const char *user, uid_t uid)
+{
+#ifndef NO_SSH_LASTLOG
+       char *time_string, hostname[MAXHOSTNAMELEN] = "", buf[512];
+       time_t last_login_time;
+
+       if (!options.print_lastlog)
+               return;
+
+# ifdef CUSTOM_SYS_AUTH_GET_LASTLOGIN_MSG
+       time_string = sys_auth_get_lastlogin_msg(user, uid);
+       if (time_string != NULL) {
+               buffer_append(&loginmsg, time_string, strlen(time_string));
+               xfree(time_string);
+       }
+# else
+       last_login_time = get_last_login_time(uid, user, hostname,
+           sizeof(hostname));
+
+       if (last_login_time != 0) {
+               time_string = ctime(&last_login_time);
+               time_string[strcspn(time_string, "\n")] = '\0';
+               if (strcmp(hostname, "") == 0)
+                       snprintf(buf, sizeof(buf), "Last login: %s\r\n",
+                           time_string);
+               else
+                       snprintf(buf, sizeof(buf), "Last login: %s from %s\r\n",
+                           time_string, hostname);
+               buffer_append(&loginmsg, buf, strlen(buf));
+       }
+# endif /* CUSTOM_SYS_AUTH_GET_LASTLOGIN_MSG */
+#endif /* NO_SSH_LASTLOG */
 }
 
 /*
@@ -64,12 +123,15 @@ get_last_login_time(uid_t uid, const char *logname,
  * systems were more standardized.
  */
 void
-record_login(pid_t pid, const char *ttyname, const char *user, uid_t uid,
-    const char *host, struct sockaddr * addr, socklen_t addrlen)
+record_login(pid_t pid, const char *tty, const char *user, uid_t uid,
+    const char *host, struct sockaddr *addr, socklen_t addrlen)
 {
        struct logininfo *li;
 
-       li = login_alloc_entry(pid, user, host, ttyname);
+       /* save previous login details before writing new */
+       store_lastlog_message(user, uid);
+
+       li = login_alloc_entry(pid, user, host, tty);
        login_set_addr(li, addr, addrlen);
        login_login(li);
        login_free_entry(li);
@@ -78,7 +140,7 @@ record_login(pid_t pid, const char *ttyname, const char *user, uid_t uid,
 #ifdef LOGIN_NEEDS_UTMPX
 void
 record_utmp_only(pid_t pid, const char *ttyname, const char *user,
-                const char *host, struct sockaddr * addr, socklen_t addrlen)
+                const char *host, struct sockaddr *addr, socklen_t addrlen)
 {
        struct logininfo *li;
 
@@ -91,11 +153,11 @@ record_utmp_only(pid_t pid, const char *ttyname, const char *user,
 
 /* Records that the user has logged out. */
 void
-record_logout(pid_t pid, const char *ttyname, const char *user)
+record_logout(pid_t pid, const char *tty, const char *user)
 {
        struct logininfo *li;
 
-       li = login_alloc_entry(pid, user, NULL, ttyname);
+       li = login_alloc_entry(pid, user, NULL, tty);
        login_logout(li);
        login_free_entry(li);
 }