|
- /* $OpenBSD: sftp-client.c,v 1.175 2023/11/13 09:18:19 tobhe Exp $ */
- /*
- * Copyright (c) 2001-2004 Damien Miller <djm@openbsd.org>
- *
- * 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.
- *
- * 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.
- */
-
- /* XXX: memleaks */
- /* XXX: signed vs unsigned */
- /* XXX: remove all logging, only return status codes */
- /* XXX: copy between two remote sites */
-
- #include "includes.h"
-
- #include <sys/types.h>
- #ifdef HAVE_SYS_STATVFS_H
- #include <sys/statvfs.h>
- #endif
- #include "openbsd-compat/sys-queue.h"
- #ifdef HAVE_SYS_STAT_H
- # include <sys/stat.h>
- #endif
- #ifdef HAVE_SYS_TIME_H
- # include <sys/time.h>
- #endif
- #include <sys/uio.h>
-
- #include <dirent.h>
- #include <errno.h>
- #ifdef HAVE_POLL_H
- #include <poll.h>
- #else
- # ifdef HAVE_SYS_POLL_H
- # include <sys/poll.h>
- # endif
- #endif
- #include <fcntl.h>
- #include <signal.h>
- #include <stdarg.h>
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <unistd.h>
-
- #include "xmalloc.h"
- #include "ssherr.h"
- #include "sshbuf.h"
- #include "log.h"
- #include "atomicio.h"
- #include "progressmeter.h"
- #include "misc.h"
- #include "utf8.h"
-
- #include "sftp.h"
- #include "sftp-common.h"
- #include "sftp-client.h"
-
- extern volatile sig_atomic_t interrupted;
- extern int showprogress;
-
- /* Default size of buffer for up/download (fix sftp.1 scp.1 if changed) */
- #define DEFAULT_COPY_BUFLEN 32768
-
- /* Default number of concurrent xfer requests (fix sftp.1 scp.1 if changed) */
- #define DEFAULT_NUM_REQUESTS 64
-
- /* Minimum amount of data to read at a time */
- #define MIN_READ_SIZE 512
-
- /* Maximum depth to descend in directory trees */
- #define MAX_DIR_DEPTH 64
-
- /* Directory separator characters */
- #ifdef HAVE_CYGWIN
- # define SFTP_DIRECTORY_CHARS "/\\"
- #else /* HAVE_CYGWIN */
- # define SFTP_DIRECTORY_CHARS "/"
- #endif /* HAVE_CYGWIN */
-
- struct sftp_conn {
- int fd_in;
- int fd_out;
- u_int download_buflen;
- u_int upload_buflen;
- u_int num_requests;
- u_int version;
- u_int msg_id;
- #define SFTP_EXT_POSIX_RENAME 0x00000001
- #define SFTP_EXT_STATVFS 0x00000002
- #define SFTP_EXT_FSTATVFS 0x00000004
- #define SFTP_EXT_HARDLINK 0x00000008
- #define SFTP_EXT_FSYNC 0x00000010
- #define SFTP_EXT_LSETSTAT 0x00000020
- #define SFTP_EXT_LIMITS 0x00000040
- #define SFTP_EXT_PATH_EXPAND 0x00000080
- #define SFTP_EXT_COPY_DATA 0x00000100
- #define SFTP_EXT_GETUSERSGROUPS_BY_ID 0x00000200
- u_int exts;
- u_int64_t limit_kbps;
- struct bwlimit bwlimit_in, bwlimit_out;
- };
-
- /* Tracks in-progress requests during file transfers */
- struct request {
- u_int id;
- size_t len;
- u_int64_t offset;
- TAILQ_ENTRY(request) tq;
- };
- TAILQ_HEAD(requests, request);
-
- static u_char *
- get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
- const char *errfmt, ...) __attribute__((format(printf, 4, 5)));
-
- static struct request *
- request_enqueue(struct requests *requests, u_int id, size_t len,
- uint64_t offset)
- {
- struct request *req;
-
- req = xcalloc(1, sizeof(*req));
- req->id = id;
- req->len = len;
- req->offset = offset;
- TAILQ_INSERT_TAIL(requests, req, tq);
- return req;
- }
-
- static struct request *
- request_find(struct requests *requests, u_int id)
- {
- struct request *req;
-
- for (req = TAILQ_FIRST(requests);
- req != NULL && req->id != id;
- req = TAILQ_NEXT(req, tq))
- ;
- return req;
- }
-
- static int
- sftpio(void *_bwlimit, size_t amount)
- {
- struct bwlimit *bwlimit = (struct bwlimit *)_bwlimit;
-
- refresh_progress_meter(0);
- if (bwlimit != NULL)
- bandwidth_limit(bwlimit, amount);
- return 0;
- }
-
- static void
- send_msg(struct sftp_conn *conn, struct sshbuf *m)
- {
- u_char mlen[4];
- struct iovec iov[2];
-
- if (sshbuf_len(m) > SFTP_MAX_MSG_LENGTH)
- fatal("Outbound message too long %zu", sshbuf_len(m));
-
- /* Send length first */
- put_u32(mlen, sshbuf_len(m));
- iov[0].iov_base = mlen;
- iov[0].iov_len = sizeof(mlen);
- iov[1].iov_base = (u_char *)sshbuf_ptr(m);
- iov[1].iov_len = sshbuf_len(m);
-
- if (atomiciov6(writev, conn->fd_out, iov, 2, sftpio,
- conn->limit_kbps > 0 ? &conn->bwlimit_out : NULL) !=
- sshbuf_len(m) + sizeof(mlen))
- fatal("Couldn't send packet: %s", strerror(errno));
-
- sshbuf_reset(m);
- }
-
- static void
- get_msg_extended(struct sftp_conn *conn, struct sshbuf *m, int initial)
- {
- u_int msg_len;
- u_char *p;
- int r;
-
- sshbuf_reset(m);
- if ((r = sshbuf_reserve(m, 4, &p)) != 0)
- fatal_fr(r, "reserve");
- if (atomicio6(read, conn->fd_in, p, 4, sftpio,
- conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL) != 4) {
- if (errno == EPIPE || errno == ECONNRESET)
- fatal("Connection closed");
- else
- fatal("Couldn't read packet: %s", strerror(errno));
- }
-
- if ((r = sshbuf_get_u32(m, &msg_len)) != 0)
- fatal_fr(r, "sshbuf_get_u32");
- if (msg_len > SFTP_MAX_MSG_LENGTH) {
- do_log2(initial ? SYSLOG_LEVEL_ERROR : SYSLOG_LEVEL_FATAL,
- "Received message too long %u", msg_len);
- fatal("Ensure the remote shell produces no output "
- "for non-interactive sessions.");
- }
-
- if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
- fatal_fr(r, "reserve");
- if (atomicio6(read, conn->fd_in, p, msg_len, sftpio,
- conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL)
- != msg_len) {
- if (errno == EPIPE)
- fatal("Connection closed");
- else
- fatal("Read packet: %s", strerror(errno));
- }
- }
-
- static void
- get_msg(struct sftp_conn *conn, struct sshbuf *m)
- {
- get_msg_extended(conn, m, 0);
- }
-
- static void
- send_string_request(struct sftp_conn *conn, u_int id, u_int code, const char *s,
- u_int len)
- {
- struct sshbuf *msg;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, code)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_string(msg, s, len)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message fd %d T:%u I:%u", conn->fd_out, code, id);
- sshbuf_free(msg);
- }
-
- static void
- send_string_attrs_request(struct sftp_conn *conn, u_int id, u_int code,
- const void *s, u_int len, Attrib *a)
- {
- struct sshbuf *msg;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, code)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_string(msg, s, len)) != 0 ||
- (r = encode_attrib(msg, a)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message fd %d T:%u I:%u F:0x%04x M:%05o",
- conn->fd_out, code, id, a->flags, a->perm);
- sshbuf_free(msg);
- }
-
- static u_int
- get_status(struct sftp_conn *conn, u_int expected_id)
- {
- struct sshbuf *msg;
- u_char type;
- u_int id, status;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "compose");
-
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
- if (type != SSH2_FXP_STATUS)
- fatal("Expected SSH2_FXP_STATUS(%u) packet, got %u",
- SSH2_FXP_STATUS, type);
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse");
- sshbuf_free(msg);
-
- debug3("SSH2_FXP_STATUS %u", status);
-
- return status;
- }
-
- static u_char *
- get_handle(struct sftp_conn *conn, u_int expected_id, size_t *len,
- const char *errfmt, ...)
- {
- struct sshbuf *msg;
- u_int id, status;
- u_char type;
- u_char *handle;
- char errmsg[256];
- va_list args;
- int r;
-
- va_start(args, errfmt);
- if (errfmt != NULL)
- vsnprintf(errmsg, sizeof(errmsg), errfmt, args);
- va_end(args);
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- if (id != expected_id)
- fatal("%s: ID mismatch (%u != %u)",
- errfmt == NULL ? __func__ : errmsg, id, expected_id);
- if (type == SSH2_FXP_STATUS) {
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- if (errfmt != NULL)
- error("%s: %s", errmsg, fx2txt(status));
- sshbuf_free(msg);
- return(NULL);
- } else if (type != SSH2_FXP_HANDLE)
- fatal("%s: Expected SSH2_FXP_HANDLE(%u) packet, got %u",
- errfmt == NULL ? __func__ : errmsg, SSH2_FXP_HANDLE, type);
-
- if ((r = sshbuf_get_string(msg, &handle, len)) != 0)
- fatal_fr(r, "parse handle");
- sshbuf_free(msg);
-
- return handle;
- }
-
- static int
- get_decode_stat(struct sftp_conn *conn, u_int expected_id, int quiet, Attrib *a)
- {
- struct sshbuf *msg;
- u_int id;
- u_char type;
- int r;
- Attrib attr;
-
- if (a != NULL)
- memset(a, '\0', sizeof(*a));
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- get_msg(conn, msg);
-
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
- if (type == SSH2_FXP_STATUS) {
- u_int status;
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- if (quiet)
- debug("stat remote: %s", fx2txt(status));
- else
- error("stat remote: %s", fx2txt(status));
- sshbuf_free(msg);
- return -1;
- } else if (type != SSH2_FXP_ATTRS) {
- fatal("Expected SSH2_FXP_ATTRS(%u) packet, got %u",
- SSH2_FXP_ATTRS, type);
- }
- if ((r = decode_attrib(msg, &attr)) != 0) {
- error_fr(r, "decode_attrib");
- sshbuf_free(msg);
- return -1;
- }
- /* success */
- if (a != NULL)
- *a = attr;
- debug3("Received stat reply T:%u I:%u F:0x%04x M:%05o",
- type, id, attr.flags, attr.perm);
- sshbuf_free(msg);
-
- return 0;
- }
-
- static int
- get_decode_statvfs(struct sftp_conn *conn, struct sftp_statvfs *st,
- u_int expected_id, int quiet)
- {
- struct sshbuf *msg;
- u_char type;
- u_int id;
- u_int64_t flag;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- get_msg(conn, msg);
-
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- debug3("Received statvfs reply T:%u I:%u", type, id);
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
- if (type == SSH2_FXP_STATUS) {
- u_int status;
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- if (quiet)
- debug("remote statvfs: %s", fx2txt(status));
- else
- error("remote statvfs: %s", fx2txt(status));
- sshbuf_free(msg);
- return -1;
- } else if (type != SSH2_FXP_EXTENDED_REPLY) {
- fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u",
- SSH2_FXP_EXTENDED_REPLY, type);
- }
-
- memset(st, 0, sizeof(*st));
- if ((r = sshbuf_get_u64(msg, &st->f_bsize)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_frsize)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_blocks)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_bfree)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_bavail)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_files)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_ffree)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_favail)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_fsid)) != 0 ||
- (r = sshbuf_get_u64(msg, &flag)) != 0 ||
- (r = sshbuf_get_u64(msg, &st->f_namemax)) != 0)
- fatal_fr(r, "parse statvfs");
-
- st->f_flag = (flag & SSH2_FXE_STATVFS_ST_RDONLY) ? ST_RDONLY : 0;
- st->f_flag |= (flag & SSH2_FXE_STATVFS_ST_NOSUID) ? ST_NOSUID : 0;
-
- sshbuf_free(msg);
-
- return 0;
- }
-
- struct sftp_conn *
- sftp_init(int fd_in, int fd_out, u_int transfer_buflen, u_int num_requests,
- u_int64_t limit_kbps)
- {
- u_char type;
- struct sshbuf *msg;
- struct sftp_conn *ret;
- int r;
-
- ret = xcalloc(1, sizeof(*ret));
- ret->msg_id = 1;
- ret->fd_in = fd_in;
- ret->fd_out = fd_out;
- ret->download_buflen = ret->upload_buflen =
- transfer_buflen ? transfer_buflen : DEFAULT_COPY_BUFLEN;
- ret->num_requests =
- num_requests ? num_requests : DEFAULT_NUM_REQUESTS;
- ret->exts = 0;
- ret->limit_kbps = 0;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_INIT)) != 0 ||
- (r = sshbuf_put_u32(msg, SSH2_FILEXFER_VERSION)) != 0)
- fatal_fr(r, "parse");
-
- send_msg(ret, msg);
-
- get_msg_extended(ret, msg, 1);
-
- /* Expecting a VERSION reply */
- if ((r = sshbuf_get_u8(msg, &type)) != 0)
- fatal_fr(r, "parse type");
- if (type != SSH2_FXP_VERSION) {
- error("Invalid packet back from SSH2_FXP_INIT (type %u)",
- type);
- sshbuf_free(msg);
- free(ret);
- return(NULL);
- }
- if ((r = sshbuf_get_u32(msg, &ret->version)) != 0)
- fatal_fr(r, "parse version");
-
- debug2("Remote version: %u", ret->version);
-
- /* Check for extensions */
- while (sshbuf_len(msg) > 0) {
- char *name;
- u_char *value;
- size_t vlen;
- int known = 0;
-
- if ((r = sshbuf_get_cstring(msg, &name, NULL)) != 0 ||
- (r = sshbuf_get_string(msg, &value, &vlen)) != 0)
- fatal_fr(r, "parse extension");
- if (strcmp(name, "posix-rename@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_POSIX_RENAME;
- known = 1;
- } else if (strcmp(name, "statvfs@openssh.com") == 0 &&
- strcmp((char *)value, "2") == 0) {
- ret->exts |= SFTP_EXT_STATVFS;
- known = 1;
- } else if (strcmp(name, "fstatvfs@openssh.com") == 0 &&
- strcmp((char *)value, "2") == 0) {
- ret->exts |= SFTP_EXT_FSTATVFS;
- known = 1;
- } else if (strcmp(name, "hardlink@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_HARDLINK;
- known = 1;
- } else if (strcmp(name, "fsync@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_FSYNC;
- known = 1;
- } else if (strcmp(name, "lsetstat@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_LSETSTAT;
- known = 1;
- } else if (strcmp(name, "limits@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_LIMITS;
- known = 1;
- } else if (strcmp(name, "expand-path@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_PATH_EXPAND;
- known = 1;
- } else if (strcmp(name, "copy-data") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_COPY_DATA;
- known = 1;
- } else if (strcmp(name,
- "users-groups-by-id@openssh.com") == 0 &&
- strcmp((char *)value, "1") == 0) {
- ret->exts |= SFTP_EXT_GETUSERSGROUPS_BY_ID;
- known = 1;
- }
- if (known) {
- debug2("Server supports extension \"%s\" revision %s",
- name, value);
- } else {
- debug2("Unrecognised server extension \"%s\"", name);
- }
- free(name);
- free(value);
- }
-
- sshbuf_free(msg);
-
- /* Query the server for its limits */
- if (ret->exts & SFTP_EXT_LIMITS) {
- struct sftp_limits limits;
- if (sftp_get_limits(ret, &limits) != 0)
- fatal_f("limits failed");
-
- /* If the caller did not specify, find a good value */
- if (transfer_buflen == 0) {
- ret->download_buflen = MINIMUM(limits.read_length,
- SFTP_MAX_MSG_LENGTH - 1024);
- ret->upload_buflen = MINIMUM(limits.write_length,
- SFTP_MAX_MSG_LENGTH - 1024);
- ret->download_buflen = MAXIMUM(ret->download_buflen, 64);
- ret->upload_buflen = MAXIMUM(ret->upload_buflen, 64);
- debug3("server upload/download buffer sizes "
- "%llu / %llu; using %u / %u",
- (unsigned long long)limits.write_length,
- (unsigned long long)limits.read_length,
- ret->upload_buflen, ret->download_buflen);
- }
-
- /* Use the server limit to scale down our value only */
- if (num_requests == 0 && limits.open_handles) {
- ret->num_requests =
- MINIMUM(DEFAULT_NUM_REQUESTS, limits.open_handles);
- if (ret->num_requests == 0)
- ret->num_requests = 1;
- debug3("server handle limit %llu; using %u",
- (unsigned long long)limits.open_handles,
- ret->num_requests);
- }
- }
-
- /* Some filexfer v.0 servers don't support large packets */
- if (ret->version == 0) {
- ret->download_buflen = MINIMUM(ret->download_buflen, 20480);
- ret->upload_buflen = MINIMUM(ret->upload_buflen, 20480);
- }
-
- ret->limit_kbps = limit_kbps;
- if (ret->limit_kbps > 0) {
- bandwidth_limit_init(&ret->bwlimit_in, ret->limit_kbps,
- ret->download_buflen);
- bandwidth_limit_init(&ret->bwlimit_out, ret->limit_kbps,
- ret->upload_buflen);
- }
-
- return ret;
- }
-
- u_int
- sftp_proto_version(struct sftp_conn *conn)
- {
- return conn->version;
- }
-
- int
- sftp_get_limits(struct sftp_conn *conn, struct sftp_limits *limits)
- {
- u_int id, msg_id;
- u_char type;
- struct sshbuf *msg;
- int r;
-
- if ((conn->exts & SFTP_EXT_LIMITS) == 0) {
- error("Server does not support limits@openssh.com extension");
- return -1;
- }
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "limits@openssh.com")) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message limits@openssh.com I:%u", id);
-
- get_msg(conn, msg);
-
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &msg_id)) != 0)
- fatal_fr(r, "parse");
-
- debug3("Received limits reply T:%u I:%u", type, msg_id);
- if (id != msg_id)
- fatal("ID mismatch (%u != %u)", msg_id, id);
- if (type != SSH2_FXP_EXTENDED_REPLY) {
- debug_f("expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u",
- SSH2_FXP_EXTENDED_REPLY, type);
- /* Disable the limits extension */
- conn->exts &= ~SFTP_EXT_LIMITS;
- sshbuf_free(msg);
- return -1;
- }
-
- memset(limits, 0, sizeof(*limits));
- if ((r = sshbuf_get_u64(msg, &limits->packet_length)) != 0 ||
- (r = sshbuf_get_u64(msg, &limits->read_length)) != 0 ||
- (r = sshbuf_get_u64(msg, &limits->write_length)) != 0 ||
- (r = sshbuf_get_u64(msg, &limits->open_handles)) != 0)
- fatal_fr(r, "parse limits");
-
- sshbuf_free(msg);
-
- return 0;
- }
-
- int
- sftp_close(struct sftp_conn *conn, const u_char *handle, u_int handle_len)
- {
- u_int id, status;
- struct sshbuf *msg;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_CLOSE)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
- fatal_fr(r, "parse");
- send_msg(conn, msg);
- debug3("Sent message SSH2_FXP_CLOSE I:%u", id);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("close remote: %s", fx2txt(status));
-
- sshbuf_free(msg);
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
-
- static int
- sftp_lsreaddir(struct sftp_conn *conn, const char *path, int print_flag,
- SFTP_DIRENT ***dir)
- {
- struct sshbuf *msg;
- u_int count, id, i, expected_id, ents = 0;
- size_t handle_len;
- u_char type, *handle;
- int status = SSH2_FX_FAILURE;
- int r;
-
- if (dir)
- *dir = NULL;
-
- id = conn->msg_id++;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPENDIR)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, path)) != 0)
- fatal_fr(r, "compose OPENDIR");
- send_msg(conn, msg);
-
- handle = get_handle(conn, id, &handle_len,
- "remote readdir(\"%s\")", path);
- if (handle == NULL) {
- sshbuf_free(msg);
- return -1;
- }
-
- if (dir) {
- ents = 0;
- *dir = xcalloc(1, sizeof(**dir));
- (*dir)[0] = NULL;
- }
-
- for (; !interrupted;) {
- id = expected_id = conn->msg_id++;
-
- debug3("Sending SSH2_FXP_READDIR I:%u", id);
-
- sshbuf_reset(msg);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_READDIR)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
- fatal_fr(r, "compose READDIR");
- send_msg(conn, msg);
-
- sshbuf_reset(msg);
-
- get_msg(conn, msg);
-
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- debug3("Received reply T:%u I:%u", type, id);
-
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
-
- if (type == SSH2_FXP_STATUS) {
- u_int rstatus;
-
- if ((r = sshbuf_get_u32(msg, &rstatus)) != 0)
- fatal_fr(r, "parse status");
- debug3("Received SSH2_FXP_STATUS %d", rstatus);
- if (rstatus == SSH2_FX_EOF)
- break;
- error("Couldn't read directory: %s", fx2txt(rstatus));
- goto out;
- } else if (type != SSH2_FXP_NAME)
- fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
- SSH2_FXP_NAME, type);
-
- if ((r = sshbuf_get_u32(msg, &count)) != 0)
- fatal_fr(r, "parse count");
- if (count > SSHBUF_SIZE_MAX)
- fatal_f("nonsensical number of entries");
- if (count == 0)
- break;
- debug3("Received %d SSH2_FXP_NAME responses", count);
- for (i = 0; i < count; i++) {
- char *filename, *longname;
- Attrib a;
-
- if ((r = sshbuf_get_cstring(msg, &filename,
- NULL)) != 0 ||
- (r = sshbuf_get_cstring(msg, &longname,
- NULL)) != 0)
- fatal_fr(r, "parse filenames");
- if ((r = decode_attrib(msg, &a)) != 0) {
- error_fr(r, "couldn't decode attrib");
- free(filename);
- free(longname);
- goto out;
- }
-
- if (print_flag)
- mprintf("%s\n", longname);
-
- /*
- * Directory entries should never contain '/'
- * These can be used to attack recursive ops
- * (e.g. send '../../../../etc/passwd')
- */
- if (strpbrk(filename, SFTP_DIRECTORY_CHARS) != NULL) {
- error("Server sent suspect path \"%s\" "
- "during readdir of \"%s\"", filename, path);
- } else if (dir) {
- *dir = xreallocarray(*dir, ents + 2, sizeof(**dir));
- (*dir)[ents] = xcalloc(1, sizeof(***dir));
- (*dir)[ents]->filename = xstrdup(filename);
- (*dir)[ents]->longname = xstrdup(longname);
- memcpy(&(*dir)[ents]->a, &a, sizeof(a));
- (*dir)[++ents] = NULL;
- }
- free(filename);
- free(longname);
- }
- }
- status = 0;
-
- out:
- sshbuf_free(msg);
- sftp_close(conn, handle, handle_len);
- free(handle);
-
- if (status != 0 && dir != NULL) {
- /* Don't return results on error */
- sftp_free_dirents(*dir);
- *dir = NULL;
- } else if (interrupted && dir != NULL && *dir != NULL) {
- /* Don't return partial matches on interrupt */
- sftp_free_dirents(*dir);
- *dir = xcalloc(1, sizeof(**dir));
- **dir = NULL;
- }
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_readdir(struct sftp_conn *conn, const char *path, SFTP_DIRENT ***dir)
- {
- return sftp_lsreaddir(conn, path, 0, dir);
- }
-
- void sftp_free_dirents(SFTP_DIRENT **s)
- {
- int i;
-
- if (s == NULL)
- return;
- for (i = 0; s[i]; i++) {
- free(s[i]->filename);
- free(s[i]->longname);
- free(s[i]);
- }
- free(s);
- }
-
- int
- sftp_rm(struct sftp_conn *conn, const char *path)
- {
- u_int status, id;
-
- debug2("Sending SSH2_FXP_REMOVE \"%s\"", path);
-
- id = conn->msg_id++;
- send_string_request(conn, id, SSH2_FXP_REMOVE, path, strlen(path));
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote delete %s: %s", path, fx2txt(status));
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_mkdir(struct sftp_conn *conn, const char *path, Attrib *a, int print_flag)
- {
- u_int status, id;
-
- debug2("Sending SSH2_FXP_MKDIR \"%s\"", path);
-
- id = conn->msg_id++;
- send_string_attrs_request(conn, id, SSH2_FXP_MKDIR, path,
- strlen(path), a);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK && print_flag)
- error("remote mkdir \"%s\": %s", path, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_rmdir(struct sftp_conn *conn, const char *path)
- {
- u_int status, id;
-
- debug2("Sending SSH2_FXP_RMDIR \"%s\"", path);
-
- id = conn->msg_id++;
- send_string_request(conn, id, SSH2_FXP_RMDIR, path,
- strlen(path));
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote rmdir \"%s\": %s", path, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_stat(struct sftp_conn *conn, const char *path, int quiet, Attrib *a)
- {
- u_int id;
-
- debug2("Sending SSH2_FXP_STAT \"%s\"", path);
-
- id = conn->msg_id++;
-
- send_string_request(conn, id,
- conn->version == 0 ? SSH2_FXP_STAT_VERSION_0 : SSH2_FXP_STAT,
- path, strlen(path));
-
- return get_decode_stat(conn, id, quiet, a);
- }
-
- int
- sftp_lstat(struct sftp_conn *conn, const char *path, int quiet, Attrib *a)
- {
- u_int id;
-
- if (conn->version == 0) {
- do_log2(quiet ? SYSLOG_LEVEL_DEBUG1 : SYSLOG_LEVEL_INFO,
- "Server version does not support lstat operation");
- return sftp_stat(conn, path, quiet, a);
- }
-
- id = conn->msg_id++;
- send_string_request(conn, id, SSH2_FXP_LSTAT, path,
- strlen(path));
-
- return get_decode_stat(conn, id, quiet, a);
- }
-
- #ifdef notyet
- int
- sftp_fstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
- int quiet, Attrib *a)
- {
- u_int id;
-
- debug2("Sending SSH2_FXP_FSTAT \"%s\"");
-
- id = conn->msg_id++;
- send_string_request(conn, id, SSH2_FXP_FSTAT, handle,
- handle_len);
-
- return get_decode_stat(conn, id, quiet, a);
- }
- #endif
-
- int
- sftp_setstat(struct sftp_conn *conn, const char *path, Attrib *a)
- {
- u_int status, id;
-
- debug2("Sending SSH2_FXP_SETSTAT \"%s\"", path);
-
- id = conn->msg_id++;
- send_string_attrs_request(conn, id, SSH2_FXP_SETSTAT, path,
- strlen(path), a);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote setstat \"%s\": %s", path, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_fsetstat(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
- Attrib *a)
- {
- u_int status, id;
-
- debug2("Sending SSH2_FXP_FSETSTAT");
-
- id = conn->msg_id++;
- send_string_attrs_request(conn, id, SSH2_FXP_FSETSTAT, handle,
- handle_len, a);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote fsetstat: %s", fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- /* Implements both the realpath and expand-path operations */
- static char *
- sftp_realpath_expand(struct sftp_conn *conn, const char *path, int expand)
- {
- struct sshbuf *msg;
- u_int expected_id, count, id;
- char *filename, *longname;
- Attrib a;
- u_char type;
- int r;
- const char *what = "SSH2_FXP_REALPATH";
-
- if (expand)
- what = "expand-path@openssh.com";
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- expected_id = id = conn->msg_id++;
- if (expand) {
- debug2("Sending SSH2_FXP_EXTENDED(expand-path@openssh.com) "
- "\"%s\"", path);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg,
- "expand-path@openssh.com")) != 0 ||
- (r = sshbuf_put_cstring(msg, path)) != 0)
- fatal_fr(r, "compose %s", what);
- send_msg(conn, msg);
- } else {
- debug2("Sending SSH2_FXP_REALPATH \"%s\"", path);
- send_string_request(conn, id, SSH2_FXP_REALPATH,
- path, strlen(path));
- }
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
-
- if (type == SSH2_FXP_STATUS) {
- u_int status;
- char *errmsg;
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0 ||
- (r = sshbuf_get_cstring(msg, &errmsg, NULL)) != 0)
- fatal_fr(r, "parse status");
- error("%s %s: %s", expand ? "expand" : "realpath",
- path, *errmsg == '\0' ? fx2txt(status) : errmsg);
- free(errmsg);
- sshbuf_free(msg);
- return NULL;
- } else if (type != SSH2_FXP_NAME)
- fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
- SSH2_FXP_NAME, type);
-
- if ((r = sshbuf_get_u32(msg, &count)) != 0)
- fatal_fr(r, "parse count");
- if (count != 1)
- fatal("Got multiple names (%d) from %s", count, what);
-
- if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
- (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
- (r = decode_attrib(msg, &a)) != 0)
- fatal_fr(r, "parse filename/attrib");
-
- debug3("%s %s -> %s", what, path, filename);
-
- free(longname);
-
- sshbuf_free(msg);
-
- return(filename);
- }
-
- char *
- sftp_realpath(struct sftp_conn *conn, const char *path)
- {
- return sftp_realpath_expand(conn, path, 0);
- }
-
- int
- sftp_can_expand_path(struct sftp_conn *conn)
- {
- return (conn->exts & SFTP_EXT_PATH_EXPAND) != 0;
- }
-
- char *
- sftp_expand_path(struct sftp_conn *conn, const char *path)
- {
- if (!sftp_can_expand_path(conn)) {
- debug3_f("no server support, fallback to realpath");
- return sftp_realpath_expand(conn, path, 0);
- }
- return sftp_realpath_expand(conn, path, 1);
- }
-
- int
- sftp_copy(struct sftp_conn *conn, const char *oldpath, const char *newpath)
- {
- Attrib junk, attr;
- struct sshbuf *msg;
- u_char *old_handle, *new_handle;
- u_int mode, status, id;
- size_t old_handle_len, new_handle_len;
- int r;
-
- /* Return if the extension is not supported */
- if ((conn->exts & SFTP_EXT_COPY_DATA) == 0) {
- error("Server does not support copy-data extension");
- return -1;
- }
-
- /* Make sure the file exists, and we can copy its perms */
- if (sftp_stat(conn, oldpath, 0, &attr) != 0)
- return -1;
-
- /* Do not preserve set[ug]id here, as we do not preserve ownership */
- if (attr.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
- mode = attr.perm & 0777;
-
- if (!S_ISREG(attr.perm)) {
- error("Cannot copy non-regular file: %s", oldpath);
- return -1;
- }
- } else {
- /* NB: The user's umask will apply to this */
- mode = 0666;
- }
-
- /* Set up the new perms for the new file */
- attrib_clear(&attr);
- attr.perm = mode;
- attr.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal("%s: sshbuf_new failed", __func__);
-
- attrib_clear(&junk); /* Send empty attributes */
-
- /* Open the old file for reading */
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
- (r = sshbuf_put_u32(msg, SSH2_FXF_READ)) != 0 ||
- (r = encode_attrib(msg, &junk)) != 0)
- fatal("%s: buffer error: %s", __func__, ssh_err(r));
- send_msg(conn, msg);
- debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, oldpath);
-
- sshbuf_reset(msg);
-
- old_handle = get_handle(conn, id, &old_handle_len,
- "remote open(\"%s\")", oldpath);
- if (old_handle == NULL) {
- sshbuf_free(msg);
- return -1;
- }
-
- /* Open the new file for writing */
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, newpath)) != 0 ||
- (r = sshbuf_put_u32(msg, SSH2_FXF_WRITE|SSH2_FXF_CREAT|
- SSH2_FXF_TRUNC)) != 0 ||
- (r = encode_attrib(msg, &attr)) != 0)
- fatal("%s: buffer error: %s", __func__, ssh_err(r));
- send_msg(conn, msg);
- debug3("Sent message SSH2_FXP_OPEN I:%u P:%s", id, newpath);
-
- sshbuf_reset(msg);
-
- new_handle = get_handle(conn, id, &new_handle_len,
- "remote open(\"%s\")", newpath);
- if (new_handle == NULL) {
- sshbuf_free(msg);
- free(old_handle);
- return -1;
- }
-
- /* Copy the file data */
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "copy-data")) != 0 ||
- (r = sshbuf_put_string(msg, old_handle, old_handle_len)) != 0 ||
- (r = sshbuf_put_u64(msg, 0)) != 0 ||
- (r = sshbuf_put_u64(msg, 0)) != 0 ||
- (r = sshbuf_put_string(msg, new_handle, new_handle_len)) != 0 ||
- (r = sshbuf_put_u64(msg, 0)) != 0)
- fatal("%s: buffer error: %s", __func__, ssh_err(r));
- send_msg(conn, msg);
- debug3("Sent message copy-data \"%s\" 0 0 -> \"%s\" 0",
- oldpath, newpath);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("Couldn't copy file \"%s\" to \"%s\": %s", oldpath,
- newpath, fx2txt(status));
-
- /* Clean up everything */
- sshbuf_free(msg);
- sftp_close(conn, old_handle, old_handle_len);
- sftp_close(conn, new_handle, new_handle_len);
- free(old_handle);
- free(new_handle);
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_rename(struct sftp_conn *conn, const char *oldpath, const char *newpath,
- int force_legacy)
- {
- struct sshbuf *msg;
- u_int status, id;
- int r, use_ext = (conn->exts & SFTP_EXT_POSIX_RENAME) && !force_legacy;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- /* Send rename request */
- id = conn->msg_id++;
- if (use_ext) {
- debug2("Sending SSH2_FXP_EXTENDED(posix-rename@openssh.com) "
- "\"%s\" to \"%s\"", oldpath, newpath);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg,
- "posix-rename@openssh.com")) != 0)
- fatal_fr(r, "compose posix-rename");
- } else {
- debug2("Sending SSH2_FXP_RENAME \"%s\" to \"%s\"",
- oldpath, newpath);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_RENAME)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0)
- fatal_fr(r, "compose rename");
- }
- if ((r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
- (r = sshbuf_put_cstring(msg, newpath)) != 0)
- fatal_fr(r, "compose paths");
- send_msg(conn, msg);
- debug3("Sent message %s \"%s\" -> \"%s\"",
- use_ext ? "posix-rename@openssh.com" :
- "SSH2_FXP_RENAME", oldpath, newpath);
- sshbuf_free(msg);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote rename \"%s\" to \"%s\": %s", oldpath,
- newpath, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_hardlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
- {
- struct sshbuf *msg;
- u_int status, id;
- int r;
-
- if ((conn->exts & SFTP_EXT_HARDLINK) == 0) {
- error("Server does not support hardlink@openssh.com extension");
- return -1;
- }
- debug2("Sending SSH2_FXP_EXTENDED(hardlink@openssh.com) "
- "\"%s\" to \"%s\"", oldpath, newpath);
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- /* Send link request */
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "hardlink@openssh.com")) != 0 ||
- (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
- (r = sshbuf_put_cstring(msg, newpath)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message hardlink@openssh.com \"%s\" -> \"%s\"",
- oldpath, newpath);
- sshbuf_free(msg);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote link \"%s\" to \"%s\": %s", oldpath,
- newpath, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_symlink(struct sftp_conn *conn, const char *oldpath, const char *newpath)
- {
- struct sshbuf *msg;
- u_int status, id;
- int r;
-
- if (conn->version < 3) {
- error("This server does not support the symlink operation");
- return(SSH2_FX_OP_UNSUPPORTED);
- }
- debug2("Sending SSH2_FXP_SYMLINK \"%s\" to \"%s\"", oldpath, newpath);
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- /* Send symlink request */
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_SYMLINK)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, oldpath)) != 0 ||
- (r = sshbuf_put_cstring(msg, newpath)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message SSH2_FXP_SYMLINK \"%s\" -> \"%s\"", oldpath,
- newpath);
- sshbuf_free(msg);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote symlink file \"%s\" to \"%s\": %s", oldpath,
- newpath, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- int
- sftp_fsync(struct sftp_conn *conn, u_char *handle, u_int handle_len)
- {
- struct sshbuf *msg;
- u_int status, id;
- int r;
-
- /* Silently return if the extension is not supported */
- if ((conn->exts & SFTP_EXT_FSYNC) == 0)
- return -1;
- debug2("Sending SSH2_FXP_EXTENDED(fsync@openssh.com)");
-
- /* Send fsync request */
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "fsync@openssh.com")) != 0 ||
- (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message fsync@openssh.com I:%u", id);
- sshbuf_free(msg);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote fsync: %s", fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- #ifdef notyet
- char *
- sftp_readlink(struct sftp_conn *conn, const char *path)
- {
- struct sshbuf *msg;
- u_int expected_id, count, id;
- char *filename, *longname;
- Attrib a;
- u_char type;
- int r;
-
- debug2("Sending SSH2_FXP_READLINK \"%s\"", path);
-
- expected_id = id = conn->msg_id++;
- send_string_request(conn, id, SSH2_FXP_READLINK, path, strlen(path));
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
-
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
-
- if (type == SSH2_FXP_STATUS) {
- u_int status;
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- error("Couldn't readlink: %s", fx2txt(status));
- sshbuf_free(msg);
- return(NULL);
- } else if (type != SSH2_FXP_NAME)
- fatal("Expected SSH2_FXP_NAME(%u) packet, got %u",
- SSH2_FXP_NAME, type);
-
- if ((r = sshbuf_get_u32(msg, &count)) != 0)
- fatal_fr(r, "parse count");
- if (count != 1)
- fatal("Got multiple names (%d) from SSH_FXP_READLINK", count);
-
- if ((r = sshbuf_get_cstring(msg, &filename, NULL)) != 0 ||
- (r = sshbuf_get_cstring(msg, &longname, NULL)) != 0 ||
- (r = decode_attrib(msg, &a)) != 0)
- fatal_fr(r, "parse filenames/attrib");
-
- debug3("SSH_FXP_READLINK %s -> %s", path, filename);
-
- free(longname);
-
- sshbuf_free(msg);
-
- return filename;
- }
- #endif
-
- int
- sftp_statvfs(struct sftp_conn *conn, const char *path, struct sftp_statvfs *st,
- int quiet)
- {
- struct sshbuf *msg;
- u_int id;
- int r;
-
- if ((conn->exts & SFTP_EXT_STATVFS) == 0) {
- error("Server does not support statvfs@openssh.com extension");
- return -1;
- }
-
- debug2("Sending SSH2_FXP_EXTENDED(statvfs@openssh.com) \"%s\"", path);
-
- id = conn->msg_id++;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "statvfs@openssh.com")) != 0 ||
- (r = sshbuf_put_cstring(msg, path)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- sshbuf_free(msg);
-
- return get_decode_statvfs(conn, st, id, quiet);
- }
-
- #ifdef notyet
- int
- sftp_fstatvfs(struct sftp_conn *conn, const u_char *handle, u_int handle_len,
- struct sftp_statvfs *st, int quiet)
- {
- struct sshbuf *msg;
- u_int id;
-
- if ((conn->exts & SFTP_EXT_FSTATVFS) == 0) {
- error("Server does not support fstatvfs@openssh.com extension");
- return -1;
- }
-
- debug2("Sending SSH2_FXP_EXTENDED(fstatvfs@openssh.com)");
-
- id = conn->msg_id++;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "fstatvfs@openssh.com")) != 0 ||
- (r = sshbuf_put_string(msg, handle, handle_len)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- sshbuf_free(msg);
-
- return get_decode_statvfs(conn, st, id, quiet);
- }
- #endif
-
- int
- sftp_lsetstat(struct sftp_conn *conn, const char *path, Attrib *a)
- {
- struct sshbuf *msg;
- u_int status, id;
- int r;
-
- if ((conn->exts & SFTP_EXT_LSETSTAT) == 0) {
- error("Server does not support lsetstat@openssh.com extension");
- return -1;
- }
-
- debug2("Sending SSH2_FXP_EXTENDED(lsetstat@openssh.com) \"%s\"", path);
-
- id = conn->msg_id++;
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, "lsetstat@openssh.com")) != 0 ||
- (r = sshbuf_put_cstring(msg, path)) != 0 ||
- (r = encode_attrib(msg, a)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- sshbuf_free(msg);
-
- status = get_status(conn, id);
- if (status != SSH2_FX_OK)
- error("remote lsetstat \"%s\": %s", path, fx2txt(status));
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- static void
- send_read_request(struct sftp_conn *conn, u_int id, u_int64_t offset,
- u_int len, const u_char *handle, u_int handle_len)
- {
- struct sshbuf *msg;
- int r;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_READ)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_string(msg, handle, handle_len)) != 0 ||
- (r = sshbuf_put_u64(msg, offset)) != 0 ||
- (r = sshbuf_put_u32(msg, len)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- sshbuf_free(msg);
- }
-
- static int
- send_open(struct sftp_conn *conn, const char *path, const char *tag,
- u_int openmode, Attrib *a, u_char **handlep, size_t *handle_lenp)
- {
- Attrib junk;
- u_char *handle;
- size_t handle_len;
- struct sshbuf *msg;
- int r;
- u_int id;
-
- debug2("Sending SSH2_FXP_OPEN \"%s\"", path);
-
- *handlep = NULL;
- *handle_lenp = 0;
-
- if (a == NULL) {
- attrib_clear(&junk); /* Send empty attributes */
- a = &junk;
- }
- /* Send open request */
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- id = conn->msg_id++;
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_OPEN)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg, path)) != 0 ||
- (r = sshbuf_put_u32(msg, openmode)) != 0 ||
- (r = encode_attrib(msg, a)) != 0)
- fatal_fr(r, "compose %s open", tag);
- send_msg(conn, msg);
- sshbuf_free(msg);
- debug3("Sent %s message SSH2_FXP_OPEN I:%u P:%s M:0x%04x",
- tag, id, path, openmode);
- if ((handle = get_handle(conn, id, &handle_len,
- "%s open \"%s\"", tag, path)) == NULL)
- return -1;
- /* success */
- *handlep = handle;
- *handle_lenp = handle_len;
- return 0;
- }
-
- static const char *
- progress_meter_path(const char *path)
- {
- const char *progresspath;
-
- if ((progresspath = strrchr(path, '/')) == NULL)
- return path;
- progresspath++;
- if (*progresspath == '\0')
- return path;
- return progresspath;
- }
-
- int
- sftp_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 inplace_flag)
- {
- struct sshbuf *msg;
- u_char *handle;
- int local_fd = -1, write_error;
- int read_error, write_errno, lmodified = 0, reordered = 0, r;
- u_int64_t offset = 0, size, highwater = 0, maxack = 0;
- u_int mode, id, buflen, num_req, max_req, status = SSH2_FX_OK;
- off_t progress_counter;
- size_t handle_len;
- struct stat st;
- struct requests requests;
- struct request *req;
- u_char type;
- Attrib attr;
-
- debug2_f("download remote \"%s\" to local \"%s\"",
- remote_path, local_path);
-
- TAILQ_INIT(&requests);
-
- if (a == NULL) {
- if (sftp_stat(conn, remote_path, 0, &attr) != 0)
- return -1;
- a = &attr;
- }
-
- /* Do not preserve set[ug]id here, as we do not preserve ownership */
- if (a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS)
- mode = a->perm & 0777;
- else
- mode = 0666;
-
- if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
- (!S_ISREG(a->perm))) {
- error("download %s: not a regular file", remote_path);
- return(-1);
- }
-
- if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
- size = a->size;
- else
- size = 0;
-
- buflen = conn->download_buflen;
-
- /* Send open request */
- if (send_open(conn, remote_path, "remote", SSH2_FXF_READ, NULL,
- &handle, &handle_len) != 0)
- return -1;
-
- 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;
- }
- if (resume_flag) {
- if (fstat(local_fd, &st) == -1) {
- error("stat local \"%s\": %s",
- local_path, strerror(errno));
- goto fail;
- }
- if (st.st_size < 0) {
- error("\"%s\" has negative size", local_path);
- goto fail;
- }
- if ((u_int64_t)st.st_size > size) {
- error("Unable to resume download of \"%s\": "
- "local file is larger than remote", local_path);
- fail:
- sftp_close(conn, handle, handle_len);
- free(handle);
- if (local_fd != -1)
- close(local_fd);
- return -1;
- }
- offset = highwater = maxack = st.st_size;
- }
-
- /* Read from remote and write to local */
- write_error = read_error = write_errno = num_req = 0;
- max_req = 1;
- progress_counter = offset;
-
- if (showprogress && size != 0) {
- start_progress_meter(progress_meter_path(remote_path),
- size, &progress_counter);
- }
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- while (num_req > 0 || max_req > 0) {
- u_char *data;
- size_t len;
-
- /*
- * Simulate EOF on interrupt: stop sending new requests and
- * allow outstanding requests to drain gracefully
- */
- if (interrupted) {
- if (num_req == 0) /* If we haven't started yet... */
- break;
- max_req = 0;
- }
-
- /* Send some more requests */
- while (num_req < max_req) {
- debug3("Request range %llu -> %llu (%d/%d)",
- (unsigned long long)offset,
- (unsigned long long)offset + buflen - 1,
- num_req, max_req);
- req = request_enqueue(&requests, conn->msg_id++,
- buflen, offset);
- offset += buflen;
- num_req++;
- send_read_request(conn, req->id, req->offset,
- req->len, handle, handle_len);
- }
-
- sshbuf_reset(msg);
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
- debug3("Received reply T:%u I:%u R:%d", type, id, max_req);
-
- /* Find the request in our queue */
- if ((req = request_find(&requests, id)) == NULL)
- fatal("Unexpected reply %u", id);
-
- switch (type) {
- case SSH2_FXP_STATUS:
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- if (status != SSH2_FX_EOF)
- read_error = 1;
- max_req = 0;
- TAILQ_REMOVE(&requests, req, tq);
- free(req);
- num_req--;
- break;
- case SSH2_FXP_DATA:
- if ((r = sshbuf_get_string(msg, &data, &len)) != 0)
- fatal_fr(r, "parse data");
- debug3("Received data %llu -> %llu",
- (unsigned long long)req->offset,
- (unsigned long long)req->offset + len - 1);
- if (len > req->len)
- fatal("Received more data than asked for "
- "%zu > %zu", len, req->len);
- lmodified = 1;
- if ((lseek(local_fd, req->offset, SEEK_SET) == -1 ||
- atomicio(vwrite, local_fd, data, len) != len) &&
- !write_error) {
- write_errno = errno;
- write_error = 1;
- max_req = 0;
- } else {
- /*
- * Track both the highest offset acknowledged
- * and the highest *contiguous* offset
- * acknowledged.
- * We'll need the latter for ftruncate()ing
- * interrupted transfers.
- */
- if (maxack < req->offset + len)
- maxack = req->offset + len;
- if (!reordered && req->offset <= highwater)
- highwater = maxack;
- else if (!reordered && req->offset > highwater)
- reordered = 1;
- }
- progress_counter += len;
- free(data);
-
- if (len == req->len) {
- TAILQ_REMOVE(&requests, req, tq);
- free(req);
- num_req--;
- } else {
- /* Resend the request for the missing data */
- debug3("Short data block, re-requesting "
- "%llu -> %llu (%2d)",
- (unsigned long long)req->offset + len,
- (unsigned long long)req->offset +
- req->len - 1, num_req);
- req->id = conn->msg_id++;
- req->len -= len;
- req->offset += len;
- send_read_request(conn, req->id,
- req->offset, req->len, handle, handle_len);
- /* Reduce the request size */
- if (len < buflen)
- buflen = MAXIMUM(MIN_READ_SIZE, len);
- }
- if (max_req > 0) { /* max_req = 0 iff EOF received */
- if (size > 0 && offset > size) {
- /* Only one request at a time
- * after the expected EOF */
- debug3("Finish at %llu (%2d)",
- (unsigned long long)offset,
- num_req);
- max_req = 1;
- } else if (max_req < conn->num_requests) {
- ++max_req;
- }
- }
- break;
- default:
- fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
- SSH2_FXP_DATA, type);
- }
- }
-
- if (showprogress && size)
- stop_progress_meter();
-
- /* Sanity check */
- if (TAILQ_FIRST(&requests) != NULL)
- fatal("Transfer complete, but requests still in queue");
-
- if (!read_error && !write_error && !interrupted) {
- /* we got everything */
- highwater = maxack;
- }
-
- /*
- * Truncate at highest contiguous point to avoid holes on interrupt,
- * or unconditionally if writing in place.
- */
- if (inplace_flag || read_error || write_error || interrupted) {
- if (reordered && resume_flag &&
- (read_error || write_error || interrupted)) {
- error("Unable to resume download of \"%s\": "
- "server reordered requests", local_path);
- }
- debug("truncating at %llu", (unsigned long long)highwater);
- if (ftruncate(local_fd, highwater) == -1)
- error("local ftruncate \"%s\": %s", local_path,
- strerror(errno));
- }
- if (read_error) {
- error("read remote \"%s\" : %s", remote_path, fx2txt(status));
- status = -1;
- sftp_close(conn, handle, handle_len);
- } else if (write_error) {
- error("write local \"%s\": %s", local_path,
- strerror(write_errno));
- status = SSH2_FX_FAILURE;
- sftp_close(conn, handle, handle_len);
- } else {
- if (sftp_close(conn, handle, handle_len) != 0 || interrupted)
- status = SSH2_FX_FAILURE;
- else
- status = SSH2_FX_OK;
- /* Override umask and utimes if asked */
- #ifdef HAVE_FCHMOD
- if (preserve_flag && fchmod(local_fd, mode) == -1)
- #else
- if (preserve_flag && chmod(local_path, mode) == -1)
- #endif /* HAVE_FCHMOD */
- error("local chmod \"%s\": %s", local_path,
- strerror(errno));
- if (preserve_flag &&
- (a->flags & SSH2_FILEXFER_ATTR_ACMODTIME)) {
- struct timeval tv[2];
- tv[0].tv_sec = a->atime;
- tv[1].tv_sec = a->mtime;
- tv[0].tv_usec = tv[1].tv_usec = 0;
- if (utimes(local_path, tv) == -1)
- error("local set times \"%s\": %s",
- local_path, strerror(errno));
- }
- if (resume_flag && !lmodified)
- logit("File \"%s\" was not modified", local_path);
- else if (fsync_flag) {
- debug("syncing \"%s\"", local_path);
- if (fsync(local_fd) == -1)
- error("local sync \"%s\": %s",
- local_path, strerror(errno));
- }
- }
- close(local_fd);
- sshbuf_free(msg);
- free(handle);
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- 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 inplace_flag)
- {
- int i, ret = 0;
- SFTP_DIRENT **dir_entries;
- char *filename, *new_src = NULL, *new_dst = NULL;
- mode_t mode = 0777, tmpmode = mode;
- Attrib *a, ldirattrib, lsym;
-
- if (depth >= MAX_DIR_DEPTH) {
- error("Maximum directory depth exceeded: %d levels", depth);
- return -1;
- }
-
- debug2_f("download dir remote \"%s\" to local \"%s\"", src, dst);
-
- if (dirattrib == NULL) {
- if (sftp_stat(conn, src, 1, &ldirattrib) != 0) {
- error("stat remote \"%s\" directory failed", src);
- return -1;
- }
- dirattrib = &ldirattrib;
- }
- if (!S_ISDIR(dirattrib->perm)) {
- error("\"%s\" is not a directory", src);
- return -1;
- }
- if (print_flag && print_flag != SFTP_PROGRESS_ONLY)
- mprintf("Retrieving %s\n", src);
-
- if (dirattrib->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) {
- mode = dirattrib->perm & 01777;
- tmpmode = mode | (S_IWUSR|S_IXUSR);
- } else {
- debug("download remote \"%s\": server "
- "did not send permissions", dst);
- }
-
- if (mkdir(dst, tmpmode) == -1 && errno != EEXIST) {
- error("mkdir %s: %s", dst, strerror(errno));
- return -1;
- }
-
- if (sftp_readdir(conn, src, &dir_entries) == -1) {
- error("remote readdir \"%s\" failed", src);
- return -1;
- }
-
- for (i = 0; dir_entries[i] != NULL && !interrupted; i++) {
- free(new_dst);
- free(new_src);
-
- filename = dir_entries[i]->filename;
- new_dst = sftp_path_append(dst, filename);
- new_src = sftp_path_append(src, filename);
-
- a = &dir_entries[i]->a;
- if (S_ISLNK(a->perm)) {
- if (!follow_link_flag) {
- logit("download \"%s\": not a regular file",
- new_src);
- continue;
- }
- /* Replace the stat contents with the symlink target */
- if (sftp_stat(conn, new_src, 1, &lsym) != 0) {
- logit("remote stat \"%s\" failed", new_src);
- ret = -1;
- continue;
- }
- a = &lsym;
- }
-
- if (S_ISDIR(a->perm)) {
- if (strcmp(filename, ".") == 0 ||
- strcmp(filename, "..") == 0)
- continue;
- if (download_dir_internal(conn, new_src, new_dst,
- depth + 1, a, preserve_flag,
- print_flag, resume_flag,
- fsync_flag, follow_link_flag, inplace_flag) == -1)
- ret = -1;
- } else if (S_ISREG(a->perm)) {
- if (sftp_download(conn, new_src, new_dst, a,
- preserve_flag, resume_flag, fsync_flag,
- inplace_flag) == -1) {
- error("Download of file %s to %s failed",
- new_src, new_dst);
- ret = -1;
- }
- } else
- logit("download \"%s\": not a regular file", new_src);
-
- }
- free(new_dst);
- free(new_src);
-
- if (preserve_flag) {
- if (dirattrib->flags & SSH2_FILEXFER_ATTR_ACMODTIME) {
- struct timeval tv[2];
- tv[0].tv_sec = dirattrib->atime;
- tv[1].tv_sec = dirattrib->mtime;
- tv[0].tv_usec = tv[1].tv_usec = 0;
- if (utimes(dst, tv) == -1)
- error("local set times on \"%s\": %s",
- dst, strerror(errno));
- } else
- debug("Server did not send times for directory "
- "\"%s\"", dst);
- }
-
- if (mode != tmpmode && chmod(dst, mode) == -1)
- error("local chmod directory \"%s\": %s", dst,
- strerror(errno));
-
- sftp_free_dirents(dir_entries);
-
- return ret;
- }
-
- int
- sftp_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 inplace_flag)
- {
- char *src_canon;
- int ret;
-
- if ((src_canon = sftp_realpath(conn, src)) == NULL) {
- error("download \"%s\": path canonicalization failed", src);
- return -1;
- }
-
- ret = download_dir_internal(conn, src_canon, dst, 0,
- dirattrib, preserve_flag, print_flag, resume_flag, fsync_flag,
- follow_link_flag, inplace_flag);
- free(src_canon);
- return ret;
- }
-
- int
- sftp_upload(struct sftp_conn *conn, const char *local_path,
- const char *remote_path, int preserve_flag, int resume,
- int fsync_flag, int inplace_flag)
- {
- int r, local_fd;
- u_int openmode, id, status = SSH2_FX_OK, reordered = 0;
- off_t offset, progress_counter;
- u_char type, *handle, *data;
- struct sshbuf *msg;
- struct stat sb;
- Attrib a, t, c;
- u_int32_t startid, ackid;
- u_int64_t highwater = 0, maxack = 0;
- struct request *ack = NULL;
- struct requests acks;
- size_t handle_len;
-
- debug2_f("upload local \"%s\" to remote \"%s\"",
- local_path, remote_path);
-
- TAILQ_INIT(&acks);
-
- if ((local_fd = open(local_path, O_RDONLY)) == -1) {
- error("open local \"%s\": %s", local_path, strerror(errno));
- return(-1);
- }
- if (fstat(local_fd, &sb) == -1) {
- error("fstat local \"%s\": %s", local_path, strerror(errno));
- close(local_fd);
- return(-1);
- }
- if (!S_ISREG(sb.st_mode)) {
- error("local \"%s\" is not a regular file", local_path);
- close(local_fd);
- return(-1);
- }
- stat_to_attrib(&sb, &a);
-
- a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
- a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
- a.perm &= 0777;
- if (!preserve_flag)
- a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
-
- if (resume) {
- /* Get remote file size if it exists */
- if (sftp_stat(conn, remote_path, 0, &c) != 0) {
- close(local_fd);
- return -1;
- }
-
- if ((off_t)c.size >= sb.st_size) {
- error("resume \"%s\": destination file "
- "same size or larger", local_path);
- close(local_fd);
- return -1;
- }
-
- if (lseek(local_fd, (off_t)c.size, SEEK_SET) == -1) {
- close(local_fd);
- return -1;
- }
- }
-
- 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", openmode, &a,
- &handle, &handle_len) != 0) {
- close(local_fd);
- return -1;
- }
-
- id = conn->msg_id;
- startid = ackid = id + 1;
- data = xmalloc(conn->upload_buflen);
-
- /* Read from local and write to remote */
- offset = progress_counter = (resume ? c.size : 0);
- if (showprogress) {
- start_progress_meter(progress_meter_path(local_path),
- sb.st_size, &progress_counter);
- }
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- for (;;) {
- int len;
-
- /*
- * Can't use atomicio here because it returns 0 on EOF,
- * thus losing the last block of the file.
- * Simulate an EOF on interrupt, allowing ACKs from the
- * server to drain.
- */
- if (interrupted || status != SSH2_FX_OK)
- len = 0;
- else do
- len = read(local_fd, data, conn->upload_buflen);
- while ((len == -1) &&
- (errno == EINTR || errno == EAGAIN || errno == EWOULDBLOCK));
-
- if (len == -1) {
- fatal("read local \"%s\": %s",
- local_path, strerror(errno));
- } else if (len != 0) {
- ack = request_enqueue(&acks, ++id, len, offset);
- sshbuf_reset(msg);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_WRITE)) != 0 ||
- (r = sshbuf_put_u32(msg, ack->id)) != 0 ||
- (r = sshbuf_put_string(msg, handle,
- handle_len)) != 0 ||
- (r = sshbuf_put_u64(msg, offset)) != 0 ||
- (r = sshbuf_put_string(msg, data, len)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%u",
- id, (unsigned long long)offset, len);
- } else if (TAILQ_FIRST(&acks) == NULL)
- break;
-
- if (ack == NULL)
- fatal("Unexpected ACK %u", id);
-
- if (id == startid || len == 0 ||
- id - ackid >= conn->num_requests) {
- u_int rid;
-
- sshbuf_reset(msg);
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &rid)) != 0)
- fatal_fr(r, "parse");
-
- if (type != SSH2_FXP_STATUS)
- fatal("Expected SSH2_FXP_STATUS(%d) packet, "
- "got %d", SSH2_FXP_STATUS, type);
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- debug3("SSH2_FXP_STATUS %u", status);
-
- /* Find the request in our queue */
- if ((ack = request_find(&acks, rid)) == NULL)
- fatal("Can't find request for ID %u", rid);
- TAILQ_REMOVE(&acks, ack, tq);
- debug3("In write loop, ack for %u %zu bytes at %lld",
- ack->id, ack->len, (unsigned long long)ack->offset);
- ++ackid;
- progress_counter += ack->len;
- /*
- * Track both the highest offset acknowledged and the
- * highest *contiguous* offset acknowledged.
- * We'll need the latter for ftruncate()ing
- * interrupted transfers.
- */
- if (maxack < ack->offset + ack->len)
- maxack = ack->offset + ack->len;
- if (!reordered && ack->offset <= highwater)
- highwater = maxack;
- else if (!reordered && ack->offset > highwater) {
- debug3_f("server reordered ACKs");
- reordered = 1;
- }
- free(ack);
- }
- offset += len;
- if (offset < 0)
- fatal_f("offset < 0");
- }
- sshbuf_free(msg);
-
- if (showprogress)
- stop_progress_meter();
- free(data);
-
- if (status == SSH2_FX_OK && !interrupted) {
- /* we got everything */
- highwater = maxack;
- }
- if (status != SSH2_FX_OK) {
- error("write remote \"%s\": %s", remote_path, fx2txt(status));
- status = SSH2_FX_FAILURE;
- }
-
- if (inplace_flag || (resume && (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;
- sftp_fsetstat(conn, handle, handle_len, &t);
- }
-
- if (close(local_fd) == -1) {
- error("close local \"%s\": %s", local_path, strerror(errno));
- status = SSH2_FX_FAILURE;
- }
-
- /* Override umask and utimes if asked */
- if (preserve_flag)
- sftp_fsetstat(conn, handle, handle_len, &a);
-
- if (fsync_flag)
- (void)sftp_fsync(conn, handle, handle_len);
-
- if (sftp_close(conn, handle, handle_len) != 0)
- status = SSH2_FX_FAILURE;
-
- free(handle);
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- 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 inplace_flag)
- {
- int ret = 0;
- DIR *dirp;
- struct dirent *dp;
- char *filename, *new_src = NULL, *new_dst = NULL;
- struct stat sb;
- Attrib a, dirattrib;
- u_int32_t saved_perm;
-
- debug2_f("upload local dir \"%s\" to remote \"%s\"", src, dst);
-
- if (depth >= MAX_DIR_DEPTH) {
- error("Maximum directory depth exceeded: %d levels", depth);
- return -1;
- }
-
- if (stat(src, &sb) == -1) {
- error("stat local \"%s\": %s", src, strerror(errno));
- return -1;
- }
- if (!S_ISDIR(sb.st_mode)) {
- error("\"%s\" is not a directory", src);
- return -1;
- }
- if (print_flag && print_flag != SFTP_PROGRESS_ONLY)
- mprintf("Entering %s\n", src);
-
- stat_to_attrib(&sb, &a);
- a.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
- a.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
- a.perm &= 01777;
- if (!preserve_flag)
- a.flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
-
- /*
- * sftp lacks a portable status value to match errno EEXIST,
- * so if we get a failure back then we must check whether
- * the path already existed and is a directory. Ensure we can
- * write to the directory we create for the duration of the transfer.
- */
- saved_perm = a.perm;
- a.perm |= (S_IWUSR|S_IXUSR);
- if (sftp_mkdir(conn, dst, &a, 0) != 0) {
- if (sftp_stat(conn, dst, 0, &dirattrib) != 0)
- return -1;
- if (!S_ISDIR(dirattrib.perm)) {
- error("\"%s\" exists but is not a directory", dst);
- return -1;
- }
- }
- a.perm = saved_perm;
-
- if ((dirp = opendir(src)) == NULL) {
- error("local opendir \"%s\": %s", src, strerror(errno));
- return -1;
- }
-
- while (((dp = readdir(dirp)) != NULL) && !interrupted) {
- if (dp->d_ino == 0)
- continue;
- free(new_dst);
- free(new_src);
- filename = dp->d_name;
- new_dst = sftp_path_append(dst, filename);
- new_src = sftp_path_append(src, filename);
-
- if (strcmp(filename, ".") == 0 || strcmp(filename, "..") == 0)
- continue;
- if (lstat(new_src, &sb) == -1) {
- logit("local lstat \"%s\": %s", filename,
- strerror(errno));
- ret = -1;
- continue;
- }
- if (S_ISLNK(sb.st_mode)) {
- if (!follow_link_flag) {
- logit("%s: not a regular file", filename);
- continue;
- }
- /* Replace the stat contents with the symlink target */
- if (stat(new_src, &sb) == -1) {
- logit("local stat \"%s\": %s", filename,
- strerror(errno));
- ret = -1;
- continue;
- }
- }
- if (S_ISDIR(sb.st_mode)) {
- if (upload_dir_internal(conn, new_src, new_dst,
- depth + 1, preserve_flag, print_flag, resume,
- fsync_flag, follow_link_flag, inplace_flag) == -1)
- ret = -1;
- } else if (S_ISREG(sb.st_mode)) {
- if (sftp_upload(conn, new_src, new_dst,
- preserve_flag, resume, fsync_flag,
- inplace_flag) == -1) {
- error("upload \"%s\" to \"%s\" failed",
- new_src, new_dst);
- ret = -1;
- }
- } else
- logit("%s: not a regular file", filename);
- }
- free(new_dst);
- free(new_src);
-
- sftp_setstat(conn, dst, &a);
-
- (void) closedir(dirp);
- return ret;
- }
-
- int
- sftp_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 inplace_flag)
- {
- char *dst_canon;
- int ret;
-
- if ((dst_canon = sftp_realpath(conn, dst)) == NULL) {
- error("upload \"%s\": path canonicalization failed", dst);
- return -1;
- }
-
- ret = upload_dir_internal(conn, src, dst_canon, 0, preserve_flag,
- print_flag, resume, fsync_flag, follow_link_flag, inplace_flag);
-
- free(dst_canon);
- return ret;
- }
-
- static void
- handle_dest_replies(struct sftp_conn *to, const char *to_path, int synchronous,
- u_int *nreqsp, u_int *write_errorp)
- {
- struct sshbuf *msg;
- u_char type;
- u_int id, status;
- int r;
- struct pollfd pfd;
-
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
-
- /* Try to eat replies from the upload side */
- while (*nreqsp > 0) {
- debug3_f("%u outstanding replies", *nreqsp);
- if (!synchronous) {
- /* Bail out if no data is ready to be read */
- pfd.fd = to->fd_in;
- pfd.events = POLLIN;
- if ((r = poll(&pfd, 1, 0)) == -1) {
- if (errno == EINTR)
- break;
- fatal_f("poll: %s", strerror(errno));
- } else if (r == 0)
- break; /* fd not ready */
- }
- sshbuf_reset(msg);
- get_msg(to, msg);
-
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "dest parse");
- debug3("Received dest reply T:%u I:%u R:%u", type, id, *nreqsp);
- if (type != SSH2_FXP_STATUS) {
- fatal_f("Expected SSH2_FXP_STATUS(%d) packet, got %d",
- SSH2_FXP_STATUS, type);
- }
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse dest status");
- debug3("dest SSH2_FXP_STATUS %u", status);
- if (status != SSH2_FX_OK) {
- /* record first error */
- if (*write_errorp == 0)
- *write_errorp = status;
- }
- /*
- * XXX this doesn't do full reply matching like sftp_upload and
- * so cannot gracefully truncate terminated uploads at a
- * high-water mark. ATM the only caller of this function (scp)
- * doesn't support transfer resumption, so this doesn't matter
- * a whole lot.
- *
- * To be safe, sftp_crossload truncates the destination file to
- * zero length on upload failure, since we can't trust the
- * server not to have reordered replies that could have
- * inserted holes where none existed in the source file.
- *
- * XXX we could get a more accutate progress bar if we updated
- * the counter based on the reply from the destination...
- */
- (*nreqsp)--;
- }
- debug3_f("done: %u outstanding replies", *nreqsp);
- sshbuf_free(msg);
- }
-
- int
- sftp_crossload(struct sftp_conn *from, struct sftp_conn *to,
- const char *from_path, const char *to_path,
- Attrib *a, int preserve_flag)
- {
- struct sshbuf *msg;
- int write_error, read_error, r;
- u_int64_t offset = 0, size;
- u_int id, buflen, num_req, max_req, status = SSH2_FX_OK;
- u_int num_upload_req;
- off_t progress_counter;
- u_char *from_handle, *to_handle;
- size_t from_handle_len, to_handle_len;
- struct requests requests;
- struct request *req;
- u_char type;
- Attrib attr;
-
- debug2_f("crossload src \"%s\" to dst \"%s\"", from_path, to_path);
-
- TAILQ_INIT(&requests);
-
- if (a == NULL) {
- if (sftp_stat(from, from_path, 0, &attr) != 0)
- return -1;
- a = &attr;
- }
-
- if ((a->flags & SSH2_FILEXFER_ATTR_PERMISSIONS) &&
- (!S_ISREG(a->perm))) {
- error("download \"%s\": not a regular file", from_path);
- return(-1);
- }
- if (a->flags & SSH2_FILEXFER_ATTR_SIZE)
- size = a->size;
- else
- size = 0;
-
- buflen = from->download_buflen;
- if (buflen > to->upload_buflen)
- buflen = to->upload_buflen;
-
- /* Send open request to read side */
- if (send_open(from, from_path, "origin", SSH2_FXF_READ, NULL,
- &from_handle, &from_handle_len) != 0)
- return -1;
-
- /* Send open request to write side */
- a->flags &= ~SSH2_FILEXFER_ATTR_SIZE;
- a->flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
- a->perm &= 0777;
- if (!preserve_flag)
- a->flags &= ~SSH2_FILEXFER_ATTR_ACMODTIME;
- if (send_open(to, to_path, "dest",
- SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC, a,
- &to_handle, &to_handle_len) != 0) {
- sftp_close(from, from_handle, from_handle_len);
- return -1;
- }
-
- /* Read from remote "from" and write to remote "to" */
- offset = 0;
- write_error = read_error = num_req = num_upload_req = 0;
- max_req = 1;
- progress_counter = 0;
-
- if (showprogress && size != 0) {
- start_progress_meter(progress_meter_path(from_path),
- size, &progress_counter);
- }
- if ((msg = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- while (num_req > 0 || max_req > 0) {
- u_char *data;
- size_t len;
-
- /*
- * Simulate EOF on interrupt: stop sending new requests and
- * allow outstanding requests to drain gracefully
- */
- if (interrupted) {
- if (num_req == 0) /* If we haven't started yet... */
- break;
- max_req = 0;
- }
-
- /* Send some more requests */
- while (num_req < max_req) {
- debug3("Request range %llu -> %llu (%d/%d)",
- (unsigned long long)offset,
- (unsigned long long)offset + buflen - 1,
- num_req, max_req);
- req = request_enqueue(&requests, from->msg_id++,
- buflen, offset);
- offset += buflen;
- num_req++;
- send_read_request(from, req->id, req->offset,
- req->len, from_handle, from_handle_len);
- }
-
- /* Try to eat replies from the upload side (nonblocking) */
- handle_dest_replies(to, to_path, 0,
- &num_upload_req, &write_error);
-
- sshbuf_reset(msg);
- get_msg(from, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
- debug3("Received origin reply T:%u I:%u R:%d",
- type, id, max_req);
-
- /* Find the request in our queue */
- if ((req = request_find(&requests, id)) == NULL)
- fatal("Unexpected reply %u", id);
-
- switch (type) {
- case SSH2_FXP_STATUS:
- if ((r = sshbuf_get_u32(msg, &status)) != 0)
- fatal_fr(r, "parse status");
- if (status != SSH2_FX_EOF)
- read_error = 1;
- max_req = 0;
- TAILQ_REMOVE(&requests, req, tq);
- free(req);
- num_req--;
- break;
- case SSH2_FXP_DATA:
- if ((r = sshbuf_get_string(msg, &data, &len)) != 0)
- fatal_fr(r, "parse data");
- debug3("Received data %llu -> %llu",
- (unsigned long long)req->offset,
- (unsigned long long)req->offset + len - 1);
- if (len > req->len)
- fatal("Received more data than asked for "
- "%zu > %zu", len, req->len);
-
- /* Write this chunk out to the destination */
- sshbuf_reset(msg);
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_WRITE)) != 0 ||
- (r = sshbuf_put_u32(msg, to->msg_id++)) != 0 ||
- (r = sshbuf_put_string(msg, to_handle,
- to_handle_len)) != 0 ||
- (r = sshbuf_put_u64(msg, req->offset)) != 0 ||
- (r = sshbuf_put_string(msg, data, len)) != 0)
- fatal_fr(r, "compose write");
- send_msg(to, msg);
- debug3("Sent message SSH2_FXP_WRITE I:%u O:%llu S:%zu",
- id, (unsigned long long)offset, len);
- num_upload_req++;
- progress_counter += len;
- free(data);
-
- if (len == req->len) {
- TAILQ_REMOVE(&requests, req, tq);
- free(req);
- num_req--;
- } else {
- /* Resend the request for the missing data */
- debug3("Short data block, re-requesting "
- "%llu -> %llu (%2d)",
- (unsigned long long)req->offset + len,
- (unsigned long long)req->offset +
- req->len - 1, num_req);
- req->id = from->msg_id++;
- req->len -= len;
- req->offset += len;
- send_read_request(from, req->id,
- req->offset, req->len,
- from_handle, from_handle_len);
- /* Reduce the request size */
- if (len < buflen)
- buflen = MAXIMUM(MIN_READ_SIZE, len);
- }
- if (max_req > 0) { /* max_req = 0 iff EOF received */
- if (size > 0 && offset > size) {
- /* Only one request at a time
- * after the expected EOF */
- debug3("Finish at %llu (%2d)",
- (unsigned long long)offset,
- num_req);
- max_req = 1;
- } else if (max_req < from->num_requests) {
- ++max_req;
- }
- }
- break;
- default:
- fatal("Expected SSH2_FXP_DATA(%u) packet, got %u",
- SSH2_FXP_DATA, type);
- }
- }
-
- if (showprogress && size)
- stop_progress_meter();
-
- /* Drain replies from the server (blocking) */
- debug3_f("waiting for %u replies from destination", num_upload_req);
- handle_dest_replies(to, to_path, 1, &num_upload_req, &write_error);
-
- /* Sanity check */
- if (TAILQ_FIRST(&requests) != NULL)
- fatal("Transfer complete, but requests still in queue");
- /* Truncate at 0 length on interrupt or error to avoid holes at dest */
- if (read_error || write_error || interrupted) {
- debug("truncating \"%s\" at 0", to_path);
- sftp_close(to, to_handle, to_handle_len);
- free(to_handle);
- if (send_open(to, to_path, "dest",
- SSH2_FXF_WRITE|SSH2_FXF_CREAT|SSH2_FXF_TRUNC, a,
- &to_handle, &to_handle_len) != 0) {
- error("dest truncate \"%s\" failed", to_path);
- to_handle = NULL;
- }
- }
- if (read_error) {
- error("read origin \"%s\": %s", from_path, fx2txt(status));
- status = -1;
- sftp_close(from, from_handle, from_handle_len);
- if (to_handle != NULL)
- sftp_close(to, to_handle, to_handle_len);
- } else if (write_error) {
- error("write dest \"%s\": %s", to_path, fx2txt(write_error));
- status = SSH2_FX_FAILURE;
- sftp_close(from, from_handle, from_handle_len);
- if (to_handle != NULL)
- sftp_close(to, to_handle, to_handle_len);
- } else {
- if (sftp_close(from, from_handle, from_handle_len) != 0 ||
- interrupted)
- status = -1;
- else
- status = SSH2_FX_OK;
- if (to_handle != NULL) {
- /* Need to resend utimes after write */
- if (preserve_flag)
- sftp_fsetstat(to, to_handle, to_handle_len, a);
- sftp_close(to, to_handle, to_handle_len);
- }
- }
- sshbuf_free(msg);
- free(from_handle);
- free(to_handle);
-
- return status == SSH2_FX_OK ? 0 : -1;
- }
-
- static int
- crossload_dir_internal(struct sftp_conn *from, struct sftp_conn *to,
- const char *from_path, const char *to_path,
- int depth, Attrib *dirattrib, int preserve_flag, int print_flag,
- int follow_link_flag)
- {
- int i, ret = 0;
- SFTP_DIRENT **dir_entries;
- char *filename, *new_from_path = NULL, *new_to_path = NULL;
- mode_t mode = 0777;
- Attrib *a, curdir, ldirattrib, newdir, lsym;
-
- debug2_f("crossload dir src \"%s\" to dst \"%s\"", from_path, to_path);
-
- if (depth >= MAX_DIR_DEPTH) {
- error("Maximum directory depth exceeded: %d levels", depth);
- return -1;
- }
-
- if (dirattrib == NULL) {
- if (sftp_stat(from, from_path, 1, &ldirattrib) != 0) {
- error("stat remote \"%s\" failed", from_path);
- return -1;
- }
- dirattrib = &ldirattrib;
- }
- if (!S_ISDIR(dirattrib->perm)) {
- error("\"%s\" is not a directory", from_path);
- return -1;
- }
- if (print_flag && print_flag != SFTP_PROGRESS_ONLY)
- mprintf("Retrieving %s\n", from_path);
-
- curdir = *dirattrib; /* dirattrib will be clobbered */
- curdir.flags &= ~SSH2_FILEXFER_ATTR_SIZE;
- curdir.flags &= ~SSH2_FILEXFER_ATTR_UIDGID;
- if ((curdir.flags & SSH2_FILEXFER_ATTR_PERMISSIONS) == 0) {
- debug("Origin did not send permissions for "
- "directory \"%s\"", to_path);
- curdir.perm = S_IWUSR|S_IXUSR;
- curdir.flags |= SSH2_FILEXFER_ATTR_PERMISSIONS;
- }
- /* We need to be able to write to the directory while we transfer it */
- mode = curdir.perm & 01777;
- curdir.perm = mode | (S_IWUSR|S_IXUSR);
-
- /*
- * sftp lacks a portable status value to match errno EEXIST,
- * so if we get a failure back then we must check whether
- * the path already existed and is a directory. Ensure we can
- * write to the directory we create for the duration of the transfer.
- */
- if (sftp_mkdir(to, to_path, &curdir, 0) != 0) {
- if (sftp_stat(to, to_path, 0, &newdir) != 0)
- return -1;
- if (!S_ISDIR(newdir.perm)) {
- error("\"%s\" exists but is not a directory", to_path);
- return -1;
- }
- }
- curdir.perm = mode;
-
- if (sftp_readdir(from, from_path, &dir_entries) == -1) {
- error("origin readdir \"%s\" failed", from_path);
- return -1;
- }
-
- for (i = 0; dir_entries[i] != NULL && !interrupted; i++) {
- free(new_from_path);
- free(new_to_path);
-
- filename = dir_entries[i]->filename;
- new_from_path = sftp_path_append(from_path, filename);
- new_to_path = sftp_path_append(to_path, filename);
-
- a = &dir_entries[i]->a;
- if (S_ISLNK(a->perm)) {
- if (!follow_link_flag) {
- logit("%s: not a regular file", filename);
- continue;
- }
- /* Replace the stat contents with the symlink target */
- if (sftp_stat(from, new_from_path, 1, &lsym) != 0) {
- logit("remote stat \"%s\" failed",
- new_from_path);
- ret = -1;
- continue;
- }
- a = &lsym;
- }
- if (S_ISDIR(a->perm)) {
- if (strcmp(filename, ".") == 0 ||
- strcmp(filename, "..") == 0)
- continue;
- if (crossload_dir_internal(from, to,
- new_from_path, new_to_path,
- depth + 1, a, preserve_flag,
- print_flag, follow_link_flag) == -1)
- ret = -1;
- } else if (S_ISREG(a->perm)) {
- if (sftp_crossload(from, to, new_from_path,
- new_to_path, a, preserve_flag) == -1) {
- error("crossload \"%s\" to \"%s\" failed",
- new_from_path, new_to_path);
- ret = -1;
- }
- } else {
- logit("origin \"%s\": not a regular file",
- new_from_path);
- }
- }
- free(new_to_path);
- free(new_from_path);
-
- sftp_setstat(to, to_path, &curdir);
-
- sftp_free_dirents(dir_entries);
-
- return ret;
- }
-
- int
- sftp_crossload_dir(struct sftp_conn *from, struct sftp_conn *to,
- const char *from_path, const char *to_path,
- Attrib *dirattrib, int preserve_flag, int print_flag, int follow_link_flag)
- {
- char *from_path_canon;
- int ret;
-
- if ((from_path_canon = sftp_realpath(from, from_path)) == NULL) {
- error("crossload \"%s\": path canonicalization failed",
- from_path);
- return -1;
- }
-
- ret = crossload_dir_internal(from, to, from_path_canon, to_path, 0,
- dirattrib, preserve_flag, print_flag, follow_link_flag);
- free(from_path_canon);
- return ret;
- }
-
- int
- sftp_can_get_users_groups_by_id(struct sftp_conn *conn)
- {
- return (conn->exts & SFTP_EXT_GETUSERSGROUPS_BY_ID) != 0;
- }
-
- int
- sftp_get_users_groups_by_id(struct sftp_conn *conn,
- const u_int *uids, u_int nuids,
- const u_int *gids, u_int ngids,
- char ***usernamesp, char ***groupnamesp)
- {
- struct sshbuf *msg, *uidbuf, *gidbuf;
- u_int i, expected_id, id;
- char *name, **usernames = NULL, **groupnames = NULL;
- u_char type;
- int r;
-
- *usernamesp = *groupnamesp = NULL;
- if (!sftp_can_get_users_groups_by_id(conn))
- return SSH_ERR_FEATURE_UNSUPPORTED;
-
- if ((msg = sshbuf_new()) == NULL ||
- (uidbuf = sshbuf_new()) == NULL ||
- (gidbuf = sshbuf_new()) == NULL)
- fatal_f("sshbuf_new failed");
- expected_id = id = conn->msg_id++;
- debug2("Sending SSH2_FXP_EXTENDED(users-groups-by-id@openssh.com)");
- for (i = 0; i < nuids; i++) {
- if ((r = sshbuf_put_u32(uidbuf, uids[i])) != 0)
- fatal_fr(r, "compose uids");
- }
- for (i = 0; i < ngids; i++) {
- if ((r = sshbuf_put_u32(gidbuf, gids[i])) != 0)
- fatal_fr(r, "compose gids");
- }
- if ((r = sshbuf_put_u8(msg, SSH2_FXP_EXTENDED)) != 0 ||
- (r = sshbuf_put_u32(msg, id)) != 0 ||
- (r = sshbuf_put_cstring(msg,
- "users-groups-by-id@openssh.com")) != 0 ||
- (r = sshbuf_put_stringb(msg, uidbuf)) != 0 ||
- (r = sshbuf_put_stringb(msg, gidbuf)) != 0)
- fatal_fr(r, "compose");
- send_msg(conn, msg);
- get_msg(conn, msg);
- if ((r = sshbuf_get_u8(msg, &type)) != 0 ||
- (r = sshbuf_get_u32(msg, &id)) != 0)
- fatal_fr(r, "parse");
- if (id != expected_id)
- fatal("ID mismatch (%u != %u)", id, expected_id);
- if (type == SSH2_FXP_STATUS) {
- u_int status;
- char *errmsg;
-
- if ((r = sshbuf_get_u32(msg, &status)) != 0 ||
- (r = sshbuf_get_cstring(msg, &errmsg, NULL)) != 0)
- fatal_fr(r, "parse status");
- error("users-groups-by-id %s",
- *errmsg == '\0' ? fx2txt(status) : errmsg);
- free(errmsg);
- sshbuf_free(msg);
- sshbuf_free(uidbuf);
- sshbuf_free(gidbuf);
- return -1;
- } else if (type != SSH2_FXP_EXTENDED_REPLY)
- fatal("Expected SSH2_FXP_EXTENDED_REPLY(%u) packet, got %u",
- SSH2_FXP_EXTENDED_REPLY, type);
-
- /* reuse */
- sshbuf_free(uidbuf);
- sshbuf_free(gidbuf);
- uidbuf = gidbuf = NULL;
- if ((r = sshbuf_froms(msg, &uidbuf)) != 0 ||
- (r = sshbuf_froms(msg, &gidbuf)) != 0)
- fatal_fr(r, "parse response");
- if (nuids > 0) {
- usernames = xcalloc(nuids, sizeof(*usernames));
- for (i = 0; i < nuids; i++) {
- if ((r = sshbuf_get_cstring(uidbuf, &name, NULL)) != 0)
- fatal_fr(r, "parse user name");
- /* Handle unresolved names */
- if (*name == '\0') {
- free(name);
- name = NULL;
- }
- usernames[i] = name;
- }
- }
- if (ngids > 0) {
- groupnames = xcalloc(ngids, sizeof(*groupnames));
- for (i = 0; i < ngids; i++) {
- if ((r = sshbuf_get_cstring(gidbuf, &name, NULL)) != 0)
- fatal_fr(r, "parse user name");
- /* Handle unresolved names */
- if (*name == '\0') {
- free(name);
- name = NULL;
- }
- groupnames[i] = name;
- }
- }
- if (sshbuf_len(uidbuf) != 0)
- fatal_f("unexpected extra username data");
- if (sshbuf_len(gidbuf) != 0)
- fatal_f("unexpected extra groupname data");
- sshbuf_free(uidbuf);
- sshbuf_free(gidbuf);
- sshbuf_free(msg);
- /* success */
- *usernamesp = usernames;
- *groupnamesp = groupnames;
- return 0;
- }
-
- char *
- sftp_path_append(const char *p1, const char *p2)
- {
- char *ret;
- size_t len = strlen(p1) + strlen(p2) + 2;
-
- ret = xmalloc(len);
- strlcpy(ret, p1, len);
- if (p1[0] != '\0' && p1[strlen(p1) - 1] != '/')
- strlcat(ret, "/", len);
- strlcat(ret, p2, len);
-
- return(ret);
- }
-
- /*
- * Arg p must be dynamically allocated. It will either be returned or
- * freed and a replacement allocated. Caller must free returned string.
- */
- char *
- sftp_make_absolute(char *p, const char *pwd)
- {
- char *abs_str;
-
- /* Derelativise */
- if (p && !path_absolute(p)) {
- abs_str = sftp_path_append(pwd, p);
- free(p);
- return(abs_str);
- } else
- return(p);
- }
-
- int
- sftp_remote_is_dir(struct sftp_conn *conn, const char *path)
- {
- Attrib a;
-
- /* XXX: report errors? */
- if (sftp_stat(conn, path, 1, &a) != 0)
- return(0);
- if (!(a.flags & SSH2_FILEXFER_ATTR_PERMISSIONS))
- return(0);
- return S_ISDIR(a.perm);
- }
-
-
- /* Check whether path returned from glob(..., GLOB_MARK, ...) is a directory */
- int
- sftp_globpath_is_dir(const char *pathname)
- {
- size_t l = strlen(pathname);
-
- return l > 0 && pathname[l - 1] == '/';
- }
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