From af1f90925494deba97a4b877798cf250f7dc75cf Mon Sep 17 00:00:00 2001 From: Darren Tucker Date: Sun, 5 Dec 2010 09:02:47 +1100 Subject: - djm@cvs.openbsd.org 2010/12/04 00:18:01 [sftp-server.c sftp.1 sftp-client.h sftp.c PROTOCOL sftp-client.c] add a protocol extension to support a hard link operation. It is available through the "ln" command in the client. The old "ln" behaviour of creating a symlink is available using its "-s" option or through the preexisting "symlink" command; based on a patch from miklos AT szeredi.hu in bz#1555; ok markus@ --- sftp-client.c | 42 ++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 40 insertions(+), 2 deletions(-) (limited to 'sftp-client.c') diff --git a/sftp-client.c b/sftp-client.c index 4e009ef25..caa384b4e 100644 --- a/sftp-client.c +++ b/sftp-client.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-client.c,v 1.93 2010/09/22 22:58:51 djm Exp $ */ +/* $OpenBSD: sftp-client.c,v 1.94 2010/12/04 00:18:01 djm Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller * @@ -75,6 +75,7 @@ struct sftp_conn { #define SFTP_EXT_POSIX_RENAME 0x00000001 #define SFTP_EXT_STATVFS 0x00000002 #define SFTP_EXT_FSTATVFS 0x00000004 +#define SFTP_EXT_HARDLINK 0x00000008 u_int exts; u_int64_t limit_kbps; struct bwlimit bwlimit_in, bwlimit_out; @@ -378,10 +379,14 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests, strcmp(value, "2") == 0) { ret->exts |= SFTP_EXT_STATVFS; known = 1; - } if (strcmp(name, "fstatvfs@openssh.com") == 0 && + } else if (strcmp(name, "fstatvfs@openssh.com") == 0 && strcmp(value, "2") == 0) { ret->exts |= SFTP_EXT_FSTATVFS; known = 1; + } else if (strcmp(name, "hardlink@openssh.com") == 0 && + strcmp(value, "1") == 0) { + ret->exts |= SFTP_EXT_HARDLINK; + known = 1; } if (known) { debug2("Server supports extension \"%s\" revision %s", @@ -794,6 +799,39 @@ do_rename(struct sftp_conn *conn, char *oldpath, char *newpath) return(status); } +int +do_hardlink(struct sftp_conn *conn, char *oldpath, char *newpath) +{ + Buffer msg; + u_int status, id; + + buffer_init(&msg); + + /* Send link request */ + id = conn->msg_id++; + if ((conn->exts & SFTP_EXT_HARDLINK) == 0) { + error("Server does not support hardlink@openssh.com extension"); + return -1; + } + + buffer_put_char(&msg, SSH2_FXP_EXTENDED); + buffer_put_int(&msg, id); + buffer_put_cstring(&msg, "hardlink@openssh.com"); + buffer_put_cstring(&msg, oldpath); + buffer_put_cstring(&msg, newpath); + send_msg(conn, &msg); + debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"", + oldpath, newpath); + buffer_free(&msg); + + status = get_status(conn, id); + if (status != SSH2_FX_OK) + error("Couldn't link file \"%s\" to \"%s\": %s", oldpath, + newpath, fx2txt(status)); + + return(status); +} + int do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath) { -- cgit v1.2.3