From 56a0697fe079ff3e1ba30a2d5c26b5e45f7b71f8 Mon Sep 17 00:00:00 2001 From: "djm@openbsd.org" Date: Fri, 13 May 2022 06:31:50 +0000 Subject: upstream: arrange for scp, when in sftp mode, to not ftruncate(3) files early previous behavious of unconditionally truncating the destination file would cause "scp ~/foo localhost:" and "scp localhost:foo ~/" to delete all the contents of their destination. spotted by solene@ sthen@, also bz3431; ok dtucker@ OpenBSD-Commit-ID: ca39fdd39e0ec1466b9666f15cbcfddea6aaa179 --- sftp-client.c | 70 ++++++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 45 insertions(+), 25 deletions(-) (limited to 'sftp-client.c') diff --git a/sftp-client.c b/sftp-client.c index 1b8ce6d7..dffb35a2 100644 --- a/sftp-client.c +++ b/sftp-client.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sftp-client.c,v 1.162 2022/03/31 03:07:03 djm Exp $ */ +/* $OpenBSD: sftp-client.c,v 1.163 2022/05/13 06:31:50 djm Exp $ */ /* * Copyright (c) 2001-2004 Damien Miller * @@ -1580,7 +1580,7 @@ progress_meter_path(const char *path) int do_download(struct sftp_conn *conn, const char *remote_path, const char *local_path, Attrib *a, int preserve_flag, int resume_flag, - int fsync_flag) + int fsync_flag, int inplace_flag) { struct sshbuf *msg; u_char *handle; @@ -1627,8 +1627,8 @@ do_download(struct sftp_conn *conn, const char *remote_path, &handle, &handle_len) != 0) return -1; - local_fd = open(local_path, - O_WRONLY | O_CREAT | (resume_flag ? 0 : O_TRUNC), mode | S_IWUSR); + local_fd = open(local_path, O_WRONLY | O_CREAT | + ((resume_flag || inplace_flag) ? 0 : O_TRUNC), mode | S_IWUSR); if (local_fd == -1) { error("open local \"%s\": %s", local_path, strerror(errno)); goto fail; @@ -1851,7 +1851,7 @@ do_download(struct sftp_conn *conn, const char *remote_path, static int download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, int depth, Attrib *dirattrib, int preserve_flag, int print_flag, - int resume_flag, int fsync_flag, int follow_link_flag) + int resume_flag, int fsync_flag, int follow_link_flag, int inplace_flag) { int i, ret = 0; SFTP_DIRENT **dir_entries; @@ -1910,7 +1910,7 @@ download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, if (download_dir_internal(conn, new_src, new_dst, depth + 1, &(dir_entries[i]->a), preserve_flag, print_flag, resume_flag, - fsync_flag, follow_link_flag) == -1) + fsync_flag, follow_link_flag, inplace_flag) == -1) ret = -1; } else if (S_ISREG(dir_entries[i]->a.perm) || (follow_link_flag && S_ISLNK(dir_entries[i]->a.perm))) { @@ -1922,7 +1922,8 @@ download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, if (do_download(conn, new_src, new_dst, S_ISLNK(dir_entries[i]->a.perm) ? NULL : &(dir_entries[i]->a), - preserve_flag, resume_flag, fsync_flag) == -1) { + preserve_flag, resume_flag, fsync_flag, + inplace_flag) == -1) { error("Download of file %s to %s failed", new_src, new_dst); ret = -1; @@ -1960,7 +1961,7 @@ download_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, int download_dir(struct sftp_conn *conn, const char *src, const char *dst, Attrib *dirattrib, int preserve_flag, int print_flag, int resume_flag, - int fsync_flag, int follow_link_flag) + int fsync_flag, int follow_link_flag, int inplace_flag) { char *src_canon; int ret; @@ -1972,26 +1973,25 @@ download_dir(struct sftp_conn *conn, const char *src, const char *dst, ret = download_dir_internal(conn, src_canon, dst, 0, dirattrib, preserve_flag, print_flag, resume_flag, fsync_flag, - follow_link_flag); + follow_link_flag, inplace_flag); free(src_canon); return ret; } int do_upload(struct sftp_conn *conn, const char *local_path, - const char *remote_path, int preserve_flag, int resume, int fsync_flag) + const char *remote_path, int preserve_flag, int resume, + int fsync_flag, int inplace_flag) { int r, local_fd; - u_int status = SSH2_FX_OK; - u_int id; - u_char type; + u_int openmode, id, status = SSH2_FX_OK, reordered = 0; off_t offset, progress_counter; - u_char *handle, *data; + u_char type, *handle, *data; struct sshbuf *msg; struct stat sb; - Attrib a, *c = NULL; - u_int32_t startid; - u_int32_t ackid; + Attrib a, t, *c = NULL; + u_int32_t startid, ackid; + u_int64_t highwater = 0; struct request *ack = NULL; struct requests acks; size_t handle_len; @@ -2043,10 +2043,15 @@ do_upload(struct sftp_conn *conn, const char *local_path, } } + openmode = SSH2_FXF_WRITE|SSH2_FXF_CREAT; + if (resume) + openmode |= SSH2_FXF_APPEND; + else if (!inplace_flag) + openmode |= SSH2_FXF_TRUNC; + /* Send open request */ - if (send_open(conn, remote_path, "dest", SSH2_FXF_WRITE|SSH2_FXF_CREAT| - (resume ? SSH2_FXF_APPEND : SSH2_FXF_TRUNC), - &a, &handle, &handle_len) != 0) { + if (send_open(conn, remote_path, "dest", openmode, &a, + &handle, &handle_len) != 0) { close(local_fd); return -1; } @@ -2128,6 +2133,12 @@ do_upload(struct sftp_conn *conn, const char *local_path, ack->id, ack->len, (unsigned long long)ack->offset); ++ackid; progress_counter += ack->len; + if (!reordered && ack->offset <= highwater) + highwater = ack->offset + ack->len; + else if (!reordered && ack->offset > highwater) { + debug3_f("server reordered ACKs"); + reordered = 1; + } free(ack); } offset += len; @@ -2145,6 +2156,14 @@ do_upload(struct sftp_conn *conn, const char *local_path, status = SSH2_FX_FAILURE; } + if ((resume || inplace_flag) && (status != SSH2_FX_OK || interrupted)) { + debug("truncating at %llu", (unsigned long long)highwater); + attrib_clear(&t); + t.flags = SSH2_FILEXFER_ATTR_SIZE; + t.size = highwater; + do_fsetstat(conn, handle, handle_len, &a); + } + if (close(local_fd) == -1) { error("close local \"%s\": %s", local_path, strerror(errno)); status = SSH2_FX_FAILURE; @@ -2168,7 +2187,7 @@ do_upload(struct sftp_conn *conn, const char *local_path, static int upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, int depth, int preserve_flag, int print_flag, int resume, int fsync_flag, - int follow_link_flag) + int follow_link_flag, int inplace_flag) { int ret = 0; DIR *dirp; @@ -2246,12 +2265,13 @@ upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, if (upload_dir_internal(conn, new_src, new_dst, depth + 1, preserve_flag, print_flag, resume, - fsync_flag, follow_link_flag) == -1) + fsync_flag, follow_link_flag, inplace_flag) == -1) ret = -1; } else if (S_ISREG(sb.st_mode) || (follow_link_flag && S_ISLNK(sb.st_mode))) { if (do_upload(conn, new_src, new_dst, - preserve_flag, resume, fsync_flag) == -1) { + preserve_flag, resume, fsync_flag, + inplace_flag) == -1) { error("upload \"%s\" to \"%s\" failed", new_src, new_dst); ret = -1; @@ -2271,7 +2291,7 @@ upload_dir_internal(struct sftp_conn *conn, const char *src, const char *dst, int upload_dir(struct sftp_conn *conn, const char *src, const char *dst, int preserve_flag, int print_flag, int resume, int fsync_flag, - int follow_link_flag) + int follow_link_flag, int inplace_flag) { char *dst_canon; int ret; @@ -2282,7 +2302,7 @@ upload_dir(struct sftp_conn *conn, const char *src, const char *dst, } ret = upload_dir_internal(conn, src, dst_canon, 0, preserve_flag, - print_flag, resume, fsync_flag, follow_link_flag); + print_flag, resume, fsync_flag, follow_link_flag, inplace_flag); free(dst_canon); return ret; -- cgit v1.2.1