X-Git-Url: http://andersk.mit.edu/gitweb/openssh.git/blobdiff_plain/fda04d7d7e5544d24e3bb0bc25c8f04a342136d2..8f81740767ba812744b66c3fb83bcc2d8d81bd91:/sftp-server.c

diff --git a/sftp-server.c b/sftp-server.c
index 9166853e..e8228005 100644
--- a/sftp-server.c
+++ b/sftp-server.c
@@ -1,28 +1,20 @@
 /*
- * Copyright (c) 2000, 2001, 2002 Markus Friedl.  All rights reserved.
+ * Copyright (c) 2000-2004 Markus Friedl.  All rights reserved.
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
  *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #include "includes.h"
-RCSID("$OpenBSD: sftp-server.c,v 1.43 2003/06/25 22:39:36 miod Exp $");
+RCSID("$OpenBSD: sftp-server.c,v 1.47 2004/06/25 05:38:48 dtucker Exp $");
 
 #include "buffer.h"
 #include "bufaux.h"
@@ -39,11 +31,7 @@ RCSID("$OpenBSD: sftp-server.c,v 1.43 2003/06/25 22:39:36 miod Exp $");
 #define get_string(lenp)		buffer_get_string(&iqueue, lenp);
 #define TRACE				debug
 
-#ifdef HAVE___PROGNAME
 extern char *__progname;
-#else
-char *__progname;
-#endif
 
 /* input and output queue */
 Buffer iqueue;
@@ -149,7 +137,7 @@ handle_init(void)
 }
 
 static int
-handle_new(int use, char *name, int fd, DIR *dirp)
+handle_new(int use, const char *name, int fd, DIR *dirp)
 {
 	int i;
 
@@ -184,7 +172,7 @@ handle_to_string(int handle, char **stringp, int *hlenp)
 }
 
 static int
-handle_from_string(char *handle, u_int hlen)
+handle_from_string(const char *handle, u_int hlen)
 {
 	int val;
 
@@ -268,7 +256,7 @@ send_msg(Buffer *m)
 }
 
 static void
-send_status(u_int32_t id, u_int32_t error)
+send_status(u_int32_t id, u_int32_t status)
 {
 	Buffer msg;
 	const char *status_messages[] = {
@@ -284,21 +272,21 @@ send_status(u_int32_t id, u_int32_t error)
 		"Unknown error"			/* Others */
 	};
 
-	TRACE("sent status id %u error %u", id, error);
+	TRACE("sent status id %u error %u", id, status);
 	buffer_init(&msg);
 	buffer_put_char(&msg, SSH2_FXP_STATUS);
 	buffer_put_int(&msg, id);
-	buffer_put_int(&msg, error);
+	buffer_put_int(&msg, status);
 	if (version >= 3) {
 		buffer_put_cstring(&msg,
-		    status_messages[MIN(error,SSH2_FX_MAX)]);
+		    status_messages[MIN(status,SSH2_FX_MAX)]);
 		buffer_put_cstring(&msg, "");
 	}
 	send_msg(&msg);
 	buffer_free(&msg);
 }
 static void
-send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
+send_data_or_handle(char type, u_int32_t id, const char *data, int dlen)
 {
 	Buffer msg;
 
@@ -311,7 +299,7 @@ send_data_or_handle(char type, u_int32_t id, char *data, int dlen)
 }
 
 static void
-send_data(u_int32_t id, char *data, int dlen)
+send_data(u_int32_t id, const char *data, int dlen)
 {
 	TRACE("sent data id %u len %d", id, dlen);
 	send_data_or_handle(SSH2_FXP_DATA, id, data, dlen);
@@ -330,7 +318,7 @@ send_handle(u_int32_t id, int handle)
 }
 
 static void
-send_names(u_int32_t id, int count, Stat *stats)
+send_names(u_int32_t id, int count, const Stat *stats)
 {
 	Buffer msg;
 	int i;
@@ -350,7 +338,7 @@ send_names(u_int32_t id, int count, Stat *stats)
 }
 
 static void
-send_attrib(u_int32_t id, Attrib *a)
+send_attrib(u_int32_t id, const Attrib *a)
 {
 	Buffer msg;
 
@@ -567,7 +555,7 @@ process_fstat(void)
 }
 
 static struct timeval *
-attrib_to_tv(Attrib *a)
+attrib_to_tv(const Attrib *a)
 {
 	static struct timeval tv[2];
 
@@ -847,9 +835,29 @@ process_rename(void)
 		status = errno_to_portable(errno);
 	else if (S_ISREG(sb.st_mode)) {
 		/* Race-free rename of regular files */
-		if (link(oldpath, newpath) == -1)
-			status = errno_to_portable(errno);
-		else if (unlink(oldpath) == -1) {
+		if (link(oldpath, newpath) == -1) {
+			if (errno == EOPNOTSUPP
+#ifdef LINK_OPNOTSUPP_ERRNO
+			    || errno == LINK_OPNOTSUPP_ERRNO
+#endif
+			    ) {
+				struct stat st;
+
+				/*
+				 * fs doesn't support links, so fall back to
+				 * stat+rename.  This is racy.
+				 */
+				if (stat(newpath, &st) == -1) {
+					if (rename(oldpath, newpath) == -1)
+						status =
+						    errno_to_portable(errno);
+					else
+						status = SSH2_FX_OK;
+				}
+			} else {
+				status = errno_to_portable(errno);
+			}
+		} else if (unlink(oldpath) == -1) {
 			status = errno_to_portable(errno);
 			/* clean spare link */
 			unlink(newpath);
@@ -871,20 +879,20 @@ process_readlink(void)
 {
 	u_int32_t id;
 	int len;
-	char link[MAXPATHLEN];
+	char buf[MAXPATHLEN];
 	char *path;
 
 	id = get_int();
 	path = get_string(NULL);
 	TRACE("readlink id %u path %s", id, path);
-	if ((len = readlink(path, link, sizeof(link) - 1)) == -1)
+	if ((len = readlink(path, buf, sizeof(buf) - 1)) == -1)
 		send_status(id, errno_to_portable(errno));
 	else {
 		Stat s;
 
-		link[len] = '\0';
+		buf[len] = '\0';
 		attrib_clear(&s.attrib);
-		s.name = s.long_name = link;
+		s.name = s.long_name = buf;
 		send_names(id, 1, &s);
 	}
 	xfree(path);