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

[openssh.git] / sshlogin.c

diff --git a/sshlogin.c b/sshlogin.c
index 4cd1c0059c54418ab4344670a7d6ffb135ed3715..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
@@ -39,63 +40,124 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: sshlogin.c,v 1.5 2002/08/29 15:57:25 stevesk 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;
+       struct logininfo li;
 
-  login_get_lastlog(&li, uid);
-  strlcpy(buf, li.hostname, bufsize);
-  return li.tv_sec;
+       login_get_lastlog(&li, uid);
+       strlcpy(buf, li.hostname, bufsize);
+       return (time_t)li.tv_sec;
 }
 
 /*
- * Records that the user has logged in.  I these parts of operating systems
- * were more standardized.
+ * 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 */
+}
+
+/*
+ * Records that the user has logged in.  I wish these parts of operating
+ * 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;
+       struct logininfo *li;
+
+       /* save previous login details before writing new */
+       store_lastlog_message(user, uid);
 
-  li = login_alloc_entry(pid, user, host, ttyname);
-  login_set_addr(li, addr, sizeof(struct sockaddr));
-  login_login(li);
-  login_free_entry(li);
+       li = login_alloc_entry(pid, user, host, tty);
+       login_set_addr(li, addr, addrlen);
+       login_login(li);
+       login_free_entry(li);
 }
 
 #ifdef LOGIN_NEEDS_UTMPX
 void
 record_utmp_only(pid_t pid, const char *ttyname, const char *user,
-                const char *host, struct sockaddr * addr)
+                const char *host, struct sockaddr *addr, socklen_t addrlen)
 {
-  struct logininfo *li;
+       struct logininfo *li;
 
-  li = login_alloc_entry(pid, user, host, ttyname);
-  login_set_addr(li, addr, sizeof(struct sockaddr));
-  login_utmp_only(li);
-  login_free_entry(li);
+       li = login_alloc_entry(pid, user, host, ttyname);
+       login_set_addr(li, addr, addrlen);
+       login_utmp_only(li);
+       login_free_entry(li);
 }
 #endif
 
 /* 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;
+       struct logininfo *li;
 
-  li = login_alloc_entry(pid, user, NULL, ttyname);
-  login_logout(li);
-  login_free_entry(li);
+       li = login_alloc_entry(pid, user, NULL, tty);
+       login_logout(li);
+       login_free_entry(li);
 }