mirror of git://anongit.mindrot.org/openssh.git
- 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@
This commit is contained in:
Darren Tucker
parent
adab6f1299
commit
af1f909254
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@ -11,6 +11,13 @@
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[auth-rsa.c]
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move check for revoked keys to run earlier (in auth_rsa_key_allowed)
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bz#1829; patch from ldv AT altlinux.org; ok markus@
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- djm@cvs.openbsd.org 2010/12/04 00:18:01
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[sftp-server.c sftp.1 sftp-client.h sftp.c PROTOCOL sftp-client.c]
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add a protocol extension to support a hard link operation. It is
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available through the "ln" command in the client. The old "ln"
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behaviour of creating a symlink is available using its "-s" option
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or through the preexisting "symlink" command; based on a patch from
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miklos AT szeredi.hu in bz#1555; ok markus@
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20101204
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- (djm) [openbsd-compat/bindresvport.c] Use arc4random_uniform(range)
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18
PROTOCOL
18
PROTOCOL
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@ -275,4 +275,20 @@ The values of the f_flag bitmask are as follows:
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Both the "statvfs@openssh.com" and "fstatvfs@openssh.com" extensions are
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advertised in the SSH_FXP_VERSION hello with version "2".
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$OpenBSD: PROTOCOL,v 1.16 2010/08/31 11:54:45 djm Exp $
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10. sftp: Extension request "hardlink@openssh.com"
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This request is for creating a hard link to a regular file. This
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request is implemented as a SSH_FXP_EXTENDED request with the
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following format:
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uint32 id
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string "hardlink@openssh.com"
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string oldpath
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string newpath
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On receiving this request the server will perform the operation
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link(oldpath, newpath) and will respond with a SSH_FXP_STATUS message.
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This extension is advertised in the SSH_FXP_VERSION hello with version
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"1".
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$OpenBSD: PROTOCOL,v 1.17 2010/12/04 00:18:01 djm Exp $
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@ -1,4 +1,4 @@
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/* $OpenBSD: sftp-client.c,v 1.93 2010/09/22 22:58:51 djm Exp $ */
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/* $OpenBSD: sftp-client.c,v 1.94 2010/12/04 00:18:01 djm Exp $ */
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/*
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* Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
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*
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@ -75,6 +75,7 @@ struct sftp_conn {
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#define SFTP_EXT_POSIX_RENAME 0x00000001
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#define SFTP_EXT_STATVFS 0x00000002
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#define SFTP_EXT_FSTATVFS 0x00000004
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#define SFTP_EXT_HARDLINK 0x00000008
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u_int exts;
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u_int64_t limit_kbps;
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struct bwlimit bwlimit_in, bwlimit_out;
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@ -378,10 +379,14 @@ do_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests,
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strcmp(value, "2") == 0) {
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ret->exts |= SFTP_EXT_STATVFS;
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known = 1;
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} if (strcmp(name, "fstatvfs@openssh.com") == 0 &&
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} else if (strcmp(name, "fstatvfs@openssh.com") == 0 &&
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strcmp(value, "2") == 0) {
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ret->exts |= SFTP_EXT_FSTATVFS;
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known = 1;
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} else if (strcmp(name, "hardlink@openssh.com") == 0 &&
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strcmp(value, "1") == 0) {
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ret->exts |= SFTP_EXT_HARDLINK;
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known = 1;
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}
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if (known) {
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debug2("Server supports extension \"%s\" revision %s",
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@ -794,6 +799,39 @@ do_rename(struct sftp_conn *conn, char *oldpath, char *newpath)
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return(status);
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}
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int
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do_hardlink(struct sftp_conn *conn, char *oldpath, char *newpath)
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{
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Buffer msg;
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u_int status, id;
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buffer_init(&msg);
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/* Send link request */
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id = conn->msg_id++;
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if ((conn->exts & SFTP_EXT_HARDLINK) == 0) {
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error("Server does not support hardlink@openssh.com extension");
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return -1;
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}
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buffer_put_char(&msg, SSH2_FXP_EXTENDED);
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buffer_put_int(&msg, id);
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buffer_put_cstring(&msg, "hardlink@openssh.com");
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buffer_put_cstring(&msg, oldpath);
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buffer_put_cstring(&msg, newpath);
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send_msg(conn, &msg);
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debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"",
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oldpath, newpath);
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buffer_free(&msg);
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status = get_status(conn, id);
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if (status != SSH2_FX_OK)
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error("Couldn't link file \"%s\" to \"%s\": %s", oldpath,
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newpath, fx2txt(status));
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return(status);
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}
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int
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do_symlink(struct sftp_conn *conn, char *oldpath, char *newpath)
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{
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@ -1,4 +1,4 @@
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/* $OpenBSD: sftp-client.h,v 1.19 2010/09/22 22:58:51 djm Exp $ */
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/* $OpenBSD: sftp-client.h,v 1.20 2010/12/04 00:18:01 djm Exp $ */
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/*
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* Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
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@ -94,6 +94,9 @@ int do_statvfs(struct sftp_conn *, const char *, struct sftp_statvfs *, int);
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/* Rename 'oldpath' to 'newpath' */
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int do_rename(struct sftp_conn *, char *, char *);
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/* Link 'oldpath' to 'newpath' */
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int do_hardlink(struct sftp_conn *, char *, char *);
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/* Rename 'oldpath' to 'newpath' */
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int do_symlink(struct sftp_conn *, char *, char *);
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@ -1,4 +1,4 @@
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/* $OpenBSD: sftp-server.c,v 1.92 2010/11/04 02:45:34 djm Exp $ */
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/* $OpenBSD: sftp-server.c,v 1.93 2010/12/04 00:18:01 djm Exp $ */
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/*
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* Copyright (c) 2000-2004 Markus Friedl. All rights reserved.
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*
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@ -535,6 +535,9 @@ process_init(void)
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/* fstatvfs extension */
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buffer_put_cstring(&msg, "fstatvfs@openssh.com");
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buffer_put_cstring(&msg, "2"); /* version */
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/* hardlink extension */
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buffer_put_cstring(&msg, "hardlink@openssh.com");
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buffer_put_cstring(&msg, "1"); /* version */
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send_msg(&msg);
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buffer_free(&msg);
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}
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@ -1222,6 +1225,27 @@ process_extended_fstatvfs(u_int32_t id)
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send_statvfs(id, &st);
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}
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static void
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process_extended_hardlink(u_int32_t id)
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{
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char *oldpath, *newpath;
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int ret, status;
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oldpath = get_string(NULL);
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newpath = get_string(NULL);
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debug3("request %u: hardlink", id);
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logit("hardlink old \"%s\" new \"%s\"", oldpath, newpath);
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if (readonly)
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status = SSH2_FX_PERMISSION_DENIED;
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else {
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ret = link(oldpath, newpath);
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status = (ret == -1) ? errno_to_portable(errno) : SSH2_FX_OK;
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}
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send_status(id, status);
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xfree(oldpath);
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xfree(newpath);
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}
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static void
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process_extended(void)
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{
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@ -1236,6 +1260,8 @@ process_extended(void)
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process_extended_statvfs(id);
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else if (strcmp(request, "fstatvfs@openssh.com") == 0)
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process_extended_fstatvfs(id);
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else if (strcmp(request, "hardlink@openssh.com") == 0)
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process_extended_hardlink(id);
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else
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send_status(id, SSH2_FX_OP_UNSUPPORTED); /* MUST */
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xfree(request);
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18
sftp.1
18
sftp.1
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@ -1,4 +1,4 @@
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.\" $OpenBSD: sftp.1,v 1.87 2010/11/18 15:01:00 jmc Exp $
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.\" $OpenBSD: sftp.1,v 1.88 2010/12/04 00:18:01 djm Exp $
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.\"
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.\" Copyright (c) 2001 Damien Miller. All rights reserved.
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.\"
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@ -22,7 +22,7 @@
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd $Mdocdate: November 18 2010 $
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.Dd $Mdocdate: December 4 2010 $
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.Dt SFTP 1
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.Os
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.Sh NAME
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@ -128,7 +128,7 @@ commands fail:
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.Ic get , put , rename , ln ,
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.Ic rm , mkdir , chdir , ls ,
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.Ic lchdir , chmod , chown ,
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.Ic chgrp , lpwd , df ,
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.Ic chgrp , lpwd , df , symlink ,
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and
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.Ic lmkdir .
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Termination on error can be suppressed on a command by command basis by
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@ -392,11 +392,19 @@ characters and may match multiple files.
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.It Ic lmkdir Ar path
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Create local directory specified by
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.Ar path .
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.It Ic ln Ar oldpath Ar newpath
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Create a symbolic link from
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.It Xo Ic ln
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.Op Fl s
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.Ar oldpath
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.Ar newpath
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.Xc
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Create a link from
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.Ar oldpath
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to
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.Ar newpath .
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If the
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.Fl s
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flag is specified the created link is a symbolic link, otherwise it is
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a hard link.
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.It Ic lpwd
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Print local working directory.
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.It Xo Ic ls
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53
sftp.c
53
sftp.c
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@ -1,4 +1,4 @@
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/* $OpenBSD: sftp.c,v 1.131 2010/10/23 22:06:12 sthen Exp $ */
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/* $OpenBSD: sftp.c,v 1.132 2010/12/04 00:18:01 djm Exp $ */
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/*
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* Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
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*
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@ -132,6 +132,7 @@ extern char *__progname;
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#define I_GET 5
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#define I_HELP 6
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#define I_LCHDIR 7
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#define I_LINK 25
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#define I_LLS 8
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#define I_LMKDIR 9
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#define I_LPWD 10
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@ -176,7 +177,7 @@ static const struct CMD cmds[] = {
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{ "lchdir", I_LCHDIR, LOCAL },
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{ "lls", I_LLS, LOCAL },
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{ "lmkdir", I_LMKDIR, LOCAL },
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{ "ln", I_SYMLINK, REMOTE },
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{ "ln", I_LINK, REMOTE },
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{ "lpwd", I_LPWD, LOCAL },
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{ "ls", I_LS, REMOTE },
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{ "lumask", I_LUMASK, NOARGS },
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@ -240,7 +241,7 @@ help(void)
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"lcd path Change local directory to 'path'\n"
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"lls [ls-options [path]] Display local directory listing\n"
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"lmkdir path Create local directory\n"
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"ln oldpath newpath Symlink remote file\n"
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"ln [-s] oldpath newpath Link remote file (-s for symlink)\n"
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"lpwd Print local working directory\n"
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"ls [-1afhlnrSt] [path] Display remote directory listing\n"
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"lumask umask Set local umask to 'umask'\n"
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@ -376,6 +377,30 @@ parse_getput_flags(const char *cmd, char **argv, int argc, int *pflag,
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return optind;
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}
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static int
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parse_link_flags(const char *cmd, char **argv, int argc, int *sflag)
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{
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extern int opterr, optind, optopt, optreset;
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int ch;
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optind = optreset = 1;
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opterr = 0;
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*sflag = 0;
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while ((ch = getopt(argc, argv, "s")) != -1) {
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switch (ch) {
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case 's':
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*sflag = 1;
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break;
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default:
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error("%s: Invalid flag -%c", cmd, optopt);
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return -1;
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}
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}
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return optind;
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}
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static int
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parse_ls_flags(char **argv, int argc, int *lflag)
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{
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@ -1088,7 +1113,7 @@ makeargv(const char *arg, int *argcp, int sloppy, char *lastquote,
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static int
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parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag,
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int *hflag, unsigned long *n_arg, char **path1, char **path2)
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int *hflag, int *sflag, unsigned long *n_arg, char **path1, char **path2)
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{
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const char *cmd, *cp = *cpp;
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char *cp2, **argv;
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@ -1138,7 +1163,8 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag,
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switch (cmdnum) {
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case I_GET:
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case I_PUT:
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if ((optidx = parse_getput_flags(cmd, argv, argc, pflag, rflag)) == -1)
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if ((optidx = parse_getput_flags(cmd, argv, argc,
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pflag, rflag)) == -1)
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return -1;
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/* Get first pathname (mandatory) */
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if (argc - optidx < 1) {
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@ -1154,8 +1180,11 @@ parse_args(const char **cpp, int *pflag, int *rflag, int *lflag, int *iflag,
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undo_glob_escape(*path2);
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}
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break;
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case I_RENAME:
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case I_LINK:
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if ((optidx = parse_link_flags(cmd, argv, argc, sflag)) == -1)
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return -1;
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case I_SYMLINK:
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case I_RENAME:
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if (argc - optidx < 2) {
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error("You must specify two paths after a %s "
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"command.", cmd);
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@ -1258,7 +1287,8 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
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int err_abort)
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{
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char *path1, *path2, *tmp;
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int pflag = 0, rflag = 0, lflag = 0, iflag = 0, hflag = 0, cmdnum, i;
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int pflag = 0, rflag = 0, lflag = 0, iflag = 0, hflag = 0, sflag = 0;
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int cmdnum, i;
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unsigned long n_arg = 0;
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Attrib a, *aa;
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char path_buf[MAXPATHLEN];
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@ -1266,8 +1296,8 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
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glob_t g;
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path1 = path2 = NULL;
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cmdnum = parse_args(&cmd, &pflag, &rflag, &lflag, &iflag, &hflag, &n_arg,
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&path1, &path2);
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cmdnum = parse_args(&cmd, &pflag, &rflag, &lflag, &iflag, &hflag,
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&sflag, &n_arg, &path1, &path2);
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if (iflag != 0)
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err_abort = 0;
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@ -1295,8 +1325,11 @@ parse_dispatch_command(struct sftp_conn *conn, const char *cmd, char **pwd,
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err = do_rename(conn, path1, path2);
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break;
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case I_SYMLINK:
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sflag = 1;
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case I_LINK:
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path1 = make_absolute(path1, *pwd);
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path2 = make_absolute(path2, *pwd);
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err = do_symlink(conn, path1, path2);
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err = (sflag ? do_symlink : do_hardlink)(conn, path1, path2);
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break;
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case I_RM:
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path1 = make_absolute(path1, *pwd);
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Loading…
Reference in New Issue