- djm@cvs.openbsd.org 2008/02/27 20:21:15

     [sftp-server.c]
     add an extension method "posix-rename@openssh.com" to perform POSIX atomic
     rename() operations. based on patch from miklos AT szeredi.hu in bz#1400;
     ok dtucker@ markus@

1 files changed, 25 insertions, 2 deletions

diff --git a/sftp-server.c b/sftp-server.c
index d3ae54428..d9549f5bc 100644
--- a/sftp-server.c
+++ b/sftp-server.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sftp-server.c,v 1.77 2008/02/08 23:24:07 djm Exp $ */
+/* $OpenBSD: sftp-server.c,v 1.78 2008/02/27 20:21:15 djm Exp $ */
 /*
  * Copyright (c) 2000-2004 Markus Friedl.  All rights reserved.
  *
@@ -487,6 +487,9 @@ process_init(void)
         buffer_init(&msg);
         buffer_put_char(&msg, SSH2_FXP_VERSION);
         buffer_put_int(&msg, SSH2_FILEXFER_VERSION);
+        /* POSIX rename extension */
+        buffer_put_cstring(&msg, "posix-rename@openssh.com");
+        buffer_put_cstring(&msg, "1"); /* version */
         send_msg(&msg);
         buffer_free(&msg);
 }
@@ -1080,6 +1083,23 @@ process_symlink(void)
 }
 
 static void
+process_extended_posix_rename(u_int32_t id)
+{
+        char *oldpath, *newpath;
+
+        oldpath = get_string(NULL);
+        newpath = get_string(NULL);
+        debug3("request %u: posix-rename", id);
+        logit("posix-rename old \"%s\" new \"%s\"", oldpath, newpath);
+        if (rename(oldpath, newpath) == -1)
+                send_status(id, errno_to_portable(errno));
+        else
+                send_status(id, SSH2_FX_OK);
+        xfree(oldpath);
+        xfree(newpath);
+}
+
+static void
 process_extended(void)
 {
         u_int32_t id;
@@ -1087,7 +1107,10 @@ process_extended(void)
 
         id = get_int();
         request = get_string(NULL);
-        send_status(id, SSH2_FX_OP_UNSUPPORTED);                /* MUST */
+        if (strcmp(request, "posix-rename@openssh.com") == 0)
+                process_extended_posix_rename(id);
+        else
+                send_status(id, SSH2_FX_OP_UNSUPPORTED);        /* MUST */
         xfree(request);
 }