X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/9ff4e23db2fbfb85ef8c76c8c079c1326190f1ad..5d145a14925b0ea8a60af808252a7c3cf78f9631:/psftp.c

diff --git a/psftp.c b/psftp.c
index ca01f12a..d395b6f1 100644
--- a/psftp.c
+++ b/psftp.c
@@ -616,12 +616,13 @@ int sftp_general_put(struct sftp_command *cmd, int restart)
 	    }
 	}
 
-	pktin = sftp_recv();
-	ret = xfer_upload_gotpkt(xfer, pktin);
-
-	if (!ret) {
-	    printf("error while writing: %s\n", fxp_error());
-	    err = 1;
+	if (!xfer_done(xfer)) {
+	    pktin = sftp_recv();
+	    ret = xfer_upload_gotpkt(xfer, pktin);
+	    if (!ret) {
+		printf("error while writing: %s\n", fxp_error());
+		err = 1;
+	    }
 	}
     }
 
@@ -1639,14 +1640,13 @@ int from_backend(void *frontend, int is_stderr, const char *data, int datalen)
     unsigned char *p = (unsigned char *) data;
     unsigned len = (unsigned) datalen;
 
-    assert(len > 0);
-
     /*
      * stderr data is just spouted to local stderr and otherwise
      * ignored.
      */
     if (is_stderr) {
-	fwrite(data, 1, len, stderr);
+	if (len > 0)
+	    fwrite(data, 1, len, stderr);
 	return 0;
     }
 
@@ -1656,7 +1656,7 @@ int from_backend(void *frontend, int is_stderr, const char *data, int datalen)
     if (!outptr)
 	return 0;
 
-    if (outlen > 0) {
+    if ((outlen > 0) && (len > 0)) {
 	unsigned used = outlen;
 	if (used > len)
 	    used = len;