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pscp.c
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pscp.c
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/*
* scp.c - Scp (Secure Copy) client for PuTTY.
* Joris van Rantwijk, Simon Tatham
*
* This is mainly based on ssh-1.2.26/scp.c by Timo Rinne & Tatu Ylonen.
* They, in turn, used stuff from BSD rcp.
*
* (SGT, 2001-09-10: Joris van Rantwijk assures me that although
* this file as originally submitted was inspired by, and
* _structurally_ based on, ssh-1.2.26's scp.c, there wasn't any
* actual code duplicated, so the above comment shouldn't give rise
* to licensing issues.)
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <time.h>
#include <assert.h>
#include "putty.h"
#include "psftp.h"
#include "ssh.h"
#include "sftp.h"
#include "storage.h"
static bool list = false;
static bool verbose = false;
static bool recursive = false;
static bool preserve = false;
static bool targetshouldbedirectory = false;
static bool statistics = true;
static int prev_stats_len = 0;
static bool scp_unsafe_mode = false;
static int errs = 0;
static bool try_scp = true;
static bool try_sftp = true;
static bool main_cmd_is_sftp = false;
static bool fallback_cmd_is_sftp = false;
static bool using_sftp = false;
static bool uploading = false;
static Backend *backend;
static Conf *conf;
static bool sent_eof = false;
static void source(const char *src);
static void rsource(const char *src);
static void sink(const char *targ, const char *src);
const char *const appname = "PSCP";
/*
* The maximum amount of queued data we accept before we stop and
* wait for the server to process some.
*/
#define MAX_SCP_BUFSIZE 16384
void ldisc_echoedit_update(Ldisc *ldisc) { }
static size_t pscp_output(Seat *, bool is_stderr, const void *, size_t);
static bool pscp_eof(Seat *);
static const SeatVtable pscp_seat_vt = {
.output = pscp_output,
.eof = pscp_eof,
.get_userpass_input = filexfer_get_userpass_input,
.notify_remote_exit = nullseat_notify_remote_exit,
.connection_fatal = console_connection_fatal,
.update_specials_menu = nullseat_update_specials_menu,
.get_ttymode = nullseat_get_ttymode,
.set_busy_status = nullseat_set_busy_status,
.verify_ssh_host_key = console_verify_ssh_host_key,
.confirm_weak_crypto_primitive = console_confirm_weak_crypto_primitive,
.confirm_weak_cached_hostkey = console_confirm_weak_cached_hostkey,
.is_utf8 = nullseat_is_never_utf8,
.echoedit_update = nullseat_echoedit_update,
.get_x_display = nullseat_get_x_display,
.get_windowid = nullseat_get_windowid,
.get_window_pixel_size = nullseat_get_window_pixel_size,
.stripctrl_new = console_stripctrl_new,
.set_trust_status = nullseat_set_trust_status_vacuously,
.verbose = cmdline_seat_verbose,
.interactive = nullseat_interactive_no,
.get_cursor_position = nullseat_get_cursor_position,
};
static Seat pscp_seat[1] = {{ &pscp_seat_vt }};
static void tell_char(FILE *stream, char c)
{
fputc(c, stream);
}
static void tell_str(FILE *stream, const char *str)
{
unsigned int i;
for (i = 0; i < strlen(str); ++i)
tell_char(stream, str[i]);
}
static void abandon_stats(void)
{
/*
* Output a \n to stdout (which is where we've been sending
* transfer statistics) so that the cursor will move to the next
* line. We should do this before displaying any other kind of
* output like an error message.
*/
if (prev_stats_len) {
putchar('\n');
fflush(stdout);
prev_stats_len = 0;
}
}
static PRINTF_LIKE(2, 3) void tell_user(FILE *stream, const char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n");
sfree(str);
abandon_stats();
tell_str(stream, str2);
sfree(str2);
}
/*
* Receive a block of data from the SSH link. Block until all data
* is available.
*
* To do this, we repeatedly call the SSH protocol module, with our
* own pscp_output() function to catch the data that comes back. We do
* this until we have enough data.
*/
static bufchain received_data;
static BinarySink *stderr_bs;
static size_t pscp_output(
Seat *seat, bool is_stderr, const void *data, size_t len)
{
/*
* stderr data is just spouted to local stderr (optionally via a
* sanitiser) and otherwise ignored.
*/
if (is_stderr) {
put_data(stderr_bs, data, len);
return 0;
}
bufchain_add(&received_data, data, len);
return 0;
}
static bool pscp_eof(Seat *seat)
{
/*
* We usually expect to be the party deciding when to close the
* connection, so if we see EOF before we sent it ourselves, we
* should panic. The exception is if we're using old-style scp and
* downloading rather than uploading.
*/
if ((using_sftp || uploading) && !sent_eof) {
seat_connection_fatal(
pscp_seat, "Received unexpected end-of-file from server");
}
return false;
}
static bool ssh_scp_recv(void *vbuf, size_t len)
{
char *buf = (char *)vbuf;
while (len > 0) {
while (bufchain_size(&received_data) == 0) {
if (backend_exitcode(backend) >= 0 ||
ssh_sftp_loop_iteration() < 0)
return false; /* doom */
}
size_t got = bufchain_fetch_consume_up_to(&received_data, buf, len);
buf += got;
len -= got;
}
return true;
}
/*
* Loop through the ssh connection and authentication process.
*/
static void ssh_scp_init(void)
{
while (!backend_sendok(backend)) {
if (backend_exitcode(backend) >= 0) {
errs++;
return;
}
if (ssh_sftp_loop_iteration() < 0) {
errs++;
return; /* doom */
}
}
/* Work out which backend we ended up using. */
if (!ssh_fallback_cmd(backend))
using_sftp = main_cmd_is_sftp;
else
using_sftp = fallback_cmd_is_sftp;
if (verbose) {
if (using_sftp)
tell_user(stderr, "Using SFTP");
else
tell_user(stderr, "Using SCP1");
}
}
/*
* Print an error message and exit after closing the SSH link.
*/
static NORETURN PRINTF_LIKE(1, 2) void bump(const char *fmt, ...)
{
char *str, *str2;
va_list ap;
va_start(ap, fmt);
str = dupvprintf(fmt, ap);
va_end(ap);
str2 = dupcat(str, "\n");
sfree(str);
abandon_stats();
tell_str(stderr, str2);
sfree(str2);
errs++;
if (backend && backend_connected(backend)) {
char ch;
backend_special(backend, SS_EOF, 0);
sent_eof = true;
ssh_scp_recv(&ch, 1);
}
cleanup_exit(1);
}
/*
* A nasty loop macro that lets me get an escape-sequence sanitised
* version of a string for display, and free it automatically
* afterwards.
*/
static StripCtrlChars *string_scc;
#define with_stripctrl(varname, input) \
for (char *varname = stripctrl_string(string_scc, input); varname; \
sfree(varname), varname = NULL)
/*
* Wait for the reply to a single SFTP request. Parallels the same
* function in psftp.c (but isn't centralised into sftp.c because the
* latter module handles SFTP only and shouldn't assume that SFTP is
* the only thing going on by calling seat_connection_fatal).
*/
struct sftp_packet *sftp_wait_for_reply(struct sftp_request *req)
{
struct sftp_packet *pktin;
struct sftp_request *rreq;
sftp_register(req);
pktin = sftp_recv();
if (pktin == NULL) {
seat_connection_fatal(
pscp_seat, "did not receive SFTP response packet from server");
}
rreq = sftp_find_request(pktin);
if (rreq != req) {
seat_connection_fatal(
pscp_seat,
"unable to understand SFTP response packet from server: %s",
fxp_error());
}
return pktin;
}
/*
* Open an SSH connection to user@host and execute cmd.
*/
static void do_cmd(char *host, char *user, char *cmd)
{
const char *err;
char *realhost;
LogContext *logctx;
if (host == NULL || host[0] == '\0')
bump("Empty host name");
/*
* Remove a colon suffix.
*/
host[host_strcspn(host, ":")] = '\0';
/*
* If we haven't loaded session details already (e.g., from -load),
* try looking for a session called "host".
*/
if (!cmdline_loaded_session()) {
/* Try to load settings for `host' into a temporary config */
Conf *conf2 = conf_new();
conf_set_str(conf2, CONF_host, "");
do_defaults(host, conf2);
if (conf_get_str(conf2, CONF_host)[0] != '\0') {
/* Settings present and include hostname */
/* Re-load data into the real config. */
do_defaults(host, conf);
} else {
/* Session doesn't exist or mention a hostname. */
/* Use `host' as a bare hostname. */
conf_set_str(conf, CONF_host, host);
}
conf_free(conf2);
} else {
/* Patch in hostname `host' to session details. */
conf_set_str(conf, CONF_host, host);
}
/*
* Force protocol to SSH if the user has somehow contrived to
* select one we don't support (e.g. by loading an inappropriate
* saved session). In that situation we assume the port number is
* useless too.)
*/
if (!backend_vt_from_proto(conf_get_int(conf, CONF_protocol))) {
conf_set_int(conf, CONF_protocol, PROT_SSH);
conf_set_int(conf, CONF_port, 22);
}
/*
* Enact command-line overrides.
*/
cmdline_run_saved(conf);
/*
* Muck about with the hostname in various ways.
*/
{
char *hostbuf = dupstr(conf_get_str(conf, CONF_host));
char *host = hostbuf;
char *p, *q;
/*
* Trim leading whitespace.
*/
host += strspn(host, " \t");
/*
* See if host is of the form user@host, and separate out
* the username if so.
*/
if (host[0] != '\0') {
char *atsign = strrchr(host, '@');
if (atsign) {
*atsign = '\0';
conf_set_str(conf, CONF_username, host);
host = atsign + 1;
}
}
/*
* Remove any remaining whitespace.
*/
p = hostbuf;
q = host;
while (*q) {
if (*q != ' ' && *q != '\t')
*p++ = *q;
q++;
}
*p = '\0';
conf_set_str(conf, CONF_host, hostbuf);
sfree(hostbuf);
}
/* Set username */
if (user != NULL && user[0] != '\0') {
conf_set_str(conf, CONF_username, user);
} else if (conf_get_str(conf, CONF_username)[0] == '\0') {
user = get_username();
if (!user)
bump("Empty user name");
else {
if (verbose)
tell_user(stderr, "Guessing user name: %s", user);
conf_set_str(conf, CONF_username, user);
sfree(user);
}
}
/*
* Force protocol to SSH if the user has somehow contrived to
* select one we don't support (e.g. by loading an inappropriate
* saved session). In that situation we assume the port number is
* useless too.)
*/
if (!backend_vt_from_proto(conf_get_int(conf, CONF_protocol))) {
conf_set_int(conf, CONF_protocol, PROT_SSH);
conf_set_int(conf, CONF_port, 22);
}
/*
* Disable scary things which shouldn't be enabled for simple
* things like SCP and SFTP: agent forwarding, port forwarding,
* X forwarding.
*/
conf_set_bool(conf, CONF_x11_forward, false);
conf_set_bool(conf, CONF_agentfwd, false);
conf_set_bool(conf, CONF_ssh_simple, true);
{
char *key;
while ((key = conf_get_str_nthstrkey(conf, CONF_portfwd, 0)) != NULL)
conf_del_str_str(conf, CONF_portfwd, key);
}
/*
* Set up main and possibly fallback command depending on
* options specified by user.
* Attempt to start the SFTP subsystem as a first choice,
* falling back to the provided scp command if that fails.
*/
conf_set_str(conf, CONF_remote_cmd2, "");
if (try_sftp) {
/* First choice is SFTP subsystem. */
main_cmd_is_sftp = true;
conf_set_str(conf, CONF_remote_cmd, "sftp");
conf_set_bool(conf, CONF_ssh_subsys, true);
if (try_scp) {
/* Fallback is to use the provided scp command. */
fallback_cmd_is_sftp = false;
conf_set_str(conf, CONF_remote_cmd2, cmd);
conf_set_bool(conf, CONF_ssh_subsys2, false);
} else {
/* Since we're not going to try SCP, we may as well try
* harder to find an SFTP server, since in the current
* implementation we have a spare slot. */
fallback_cmd_is_sftp = true;
/* see psftp.c for full explanation of this kludge */
conf_set_str(conf, CONF_remote_cmd2,
"test -x /usr/lib/sftp-server &&"
" exec /usr/lib/sftp-server\n"
"test -x /usr/local/lib/sftp-server &&"
" exec /usr/local/lib/sftp-server\n"
"exec sftp-server");
conf_set_bool(conf, CONF_ssh_subsys2, false);
}
} else {
/* Don't try SFTP at all; just try the scp command. */
main_cmd_is_sftp = false;
conf_set_str(conf, CONF_remote_cmd, cmd);
conf_set_bool(conf, CONF_ssh_subsys, false);
}
conf_set_bool(conf, CONF_nopty, true);
logctx = log_init(console_cli_logpolicy, conf);
platform_psftp_pre_conn_setup(console_cli_logpolicy);
err = backend_init(backend_vt_from_proto(
conf_get_int(conf, CONF_protocol)),
pscp_seat, &backend, logctx, conf,
conf_get_str(conf, CONF_host),
conf_get_int(conf, CONF_port),
&realhost, 0,
conf_get_bool(conf, CONF_tcp_keepalives));
if (err != NULL)
bump("ssh_init: %s", err);
ssh_scp_init();
if (verbose && realhost != NULL && errs == 0)
tell_user(stderr, "Connected to %s", realhost);
sfree(realhost);
}
/*
* Update statistic information about current file.
*/
static void print_stats(const char *name, uint64_t size, uint64_t done,
time_t start, time_t now)
{
float ratebs;
unsigned long eta;
char *etastr;
int pct;
int len;
int elap;
elap = (unsigned long) difftime(now, start);
if (now > start)
ratebs = (float)done / elap;
else
ratebs = (float)done;
if (ratebs < 1.0)
eta = size - done;
else
eta = (unsigned long)((size - done) / ratebs);
etastr = dupprintf("%02ld:%02ld:%02ld",
eta / 3600, (eta % 3600) / 60, eta % 60);
pct = (int) (100.0 * done / size);
{
/* divide by 1024 to provide kB */
len = printf("\r%-25.25s | %"PRIu64" kB | %5.1f kB/s | "
"ETA: %8s | %3d%%", name, done >> 10,
ratebs / 1024.0, etastr, pct);
if (len < prev_stats_len)
printf("%*s", prev_stats_len - len, "");
prev_stats_len = len;
if (done == size)
abandon_stats();
fflush(stdout);
}
free(etastr);
}
/*
* Find a colon in str and return a pointer to the colon.
* This is used to separate hostname from filename.
*/
static char *colon(char *str)
{
/* We ignore a leading colon, since the hostname cannot be
empty. We also ignore a colon as second character because
of filenames like f:myfile.txt. */
if (str[0] == '\0' || str[0] == ':' ||
(str[0] != '[' && str[1] == ':'))
return (NULL);
str += host_strcspn(str, ":/\\");
if (*str == ':')
return (str);
else
return (NULL);
}
/*
* Determine whether a string is entirely composed of dots.
*/
static bool is_dots(char *str)
{
return str[strspn(str, ".")] == '\0';
}
/*
* Wait for a response from the other side.
* Return 0 if ok, -1 if error.
*/
static int response(void)
{
char ch, resp, rbuf[2048];
int p;
if (!ssh_scp_recv(&resp, 1))
bump("Lost connection");
p = 0;
switch (resp) {
case 0: /* ok */
return (0);
default:
rbuf[p++] = resp;
/* fallthrough */
case 1: /* error */
case 2: /* fatal error */
do {
if (!ssh_scp_recv(&ch, 1))
bump("Protocol error: Lost connection");
rbuf[p++] = ch;
} while (p < sizeof(rbuf) && ch != '\n');
rbuf[p - 1] = '\0';
if (resp == 1)
tell_user(stderr, "%s", rbuf);
else
bump("%s", rbuf);
errs++;
return (-1);
}
}
bool sftp_recvdata(char *buf, size_t len)
{
return ssh_scp_recv(buf, len);
}
bool sftp_senddata(const char *buf, size_t len)
{
backend_send(backend, buf, len);
return true;
}
size_t sftp_sendbuffer(void)
{
return backend_sendbuffer(backend);
}
/* ----------------------------------------------------------------------
* sftp-based replacement for the hacky `pscp -ls'.
*/
void list_directory_from_sftp_warn_unsorted(void)
{
fprintf(stderr,
"Directory is too large to sort; writing file names unsorted\n");
}
void list_directory_from_sftp_print(struct fxp_name *name)
{
with_stripctrl(san, name->longname)
printf("%s\n", san);
}
void scp_sftp_listdir(const char *dirname)
{
struct fxp_handle *dirh;
struct fxp_names *names;
struct sftp_packet *pktin;
struct sftp_request *req;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return;
}
printf("Listing directory %s\n", dirname);
req = fxp_opendir_send(dirname);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (dirh == NULL) {
tell_user(stderr, "Unable to open %s: %s\n", dirname, fxp_error());
errs++;
} else {
struct list_directory_from_sftp_ctx *ctx =
list_directory_from_sftp_new();
while (1) {
req = fxp_readdir_send(dirh);
pktin = sftp_wait_for_reply(req);
names = fxp_readdir_recv(pktin, req);
if (names == NULL) {
if (fxp_error_type() == SSH_FX_EOF)
break;
printf("Reading directory %s: %s\n", dirname, fxp_error());
break;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
for (size_t i = 0; i < names->nnames; i++)
list_directory_from_sftp_feed(ctx, &names->names[i]);
fxp_free_names(names);
}
req = fxp_close_send(dirh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
list_directory_from_sftp_finish(ctx);
list_directory_from_sftp_free(ctx);
}
}
/* ----------------------------------------------------------------------
* Helper routines that contain the actual SCP protocol elements,
* implemented both as SCP1 and SFTP.
*/
static struct scp_sftp_dirstack {
struct scp_sftp_dirstack *next;
struct fxp_name *names;
int namepos, namelen;
char *dirpath;
char *wildcard;
bool matched_something; /* wildcard match set was non-empty */
} *scp_sftp_dirstack_head;
static char *scp_sftp_remotepath, *scp_sftp_currentname;
static char *scp_sftp_wildcard;
static bool scp_sftp_targetisdir, scp_sftp_donethistarget;
static bool scp_sftp_preserve, scp_sftp_recursive;
static unsigned long scp_sftp_mtime, scp_sftp_atime;
static bool scp_has_times;
static struct fxp_handle *scp_sftp_filehandle;
static struct fxp_xfer *scp_sftp_xfer;
static uint64_t scp_sftp_fileoffset;
int scp_source_setup(const char *target, bool shouldbedir)
{
if (using_sftp) {
/*
* Find out whether the target filespec is in fact a
* directory.
*/
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
bool ret;
if (!fxp_init()) {
tell_user(stderr, "unable to initialise SFTP: %s", fxp_error());
errs++;
return 1;
}
req = fxp_stat_send(target);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS))
scp_sftp_targetisdir = false;
else
scp_sftp_targetisdir = (attrs.permissions & 0040000) != 0;
if (shouldbedir && !scp_sftp_targetisdir) {
bump("pscp: remote filespec %s: not a directory\n", target);
}
scp_sftp_remotepath = dupstr(target);
scp_has_times = false;
} else {
(void) response();
}
return 0;
}
int scp_send_errmsg(char *str)
{
if (using_sftp) {
/* do nothing; we never need to send our errors to the server */
} else {
backend_send(backend, "\001", 1);/* scp protocol error prefix */
backend_send(backend, str, strlen(str));
}
return 0; /* can't fail */
}
int scp_send_filetimes(unsigned long mtime, unsigned long atime)
{
if (using_sftp) {
scp_sftp_mtime = mtime;
scp_sftp_atime = atime;
scp_has_times = true;
return 0;
} else {
char buf[80];
sprintf(buf, "T%lu 0 %lu 0\n", mtime, atime);
backend_send(backend, buf, strlen(buf));
return response();
}
}
int scp_send_filename(const char *name, uint64_t size, int permissions)
{
if (using_sftp) {
char *fullname;
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
if (scp_sftp_targetisdir) {
fullname = dupcat(scp_sftp_remotepath, "/", name);
} else {
fullname = dupstr(scp_sftp_remotepath);
}
attrs.flags = 0;
PUT_PERMISSIONS(attrs, permissions);
req = fxp_open_send(fullname,
SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC,
&attrs);
pktin = sftp_wait_for_reply(req);
scp_sftp_filehandle = fxp_open_recv(pktin, req);
if (!scp_sftp_filehandle) {
tell_user(stderr, "pscp: unable to open %s: %s",
fullname, fxp_error());
sfree(fullname);
errs++;
return 1;
}
scp_sftp_fileoffset = 0;
scp_sftp_xfer = xfer_upload_init(scp_sftp_filehandle,
scp_sftp_fileoffset);
sfree(fullname);
return 0;
} else {
char *buf;
if (permissions < 0)
permissions = 0644;
buf = dupprintf("C%04o %"PRIu64" ", (int)(permissions & 07777), size);
backend_send(backend, buf, strlen(buf));
sfree(buf);
backend_send(backend, name, strlen(name));
backend_send(backend, "\n", 1);
return response();
}
}
int scp_send_filedata(char *data, int len)
{
if (using_sftp) {
int ret;
struct sftp_packet *pktin;
if (!scp_sftp_filehandle) {
return 1;
}
while (!xfer_upload_ready(scp_sftp_xfer)) {
if (toplevel_callback_pending()) {
/* If we have pending callbacks, they might make
* xfer_upload_ready start to return true. So we should
* run them and then re-check xfer_upload_ready, before
* we go as far as waiting for an entire packet to
* arrive. */
run_toplevel_callbacks();
continue;
}
pktin = sftp_recv();
ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_upload_data(scp_sftp_xfer, data, len);
scp_sftp_fileoffset += len;
return 0;
} else {
int bufsize = backend_send(backend, data, len);
/*
* If the network transfer is backing up - that is, the
* remote site is not accepting data as fast as we can
* produce it - then we must loop on network events until
* we have space in the buffer again.
*/
while (bufsize > MAX_SCP_BUFSIZE) {
if (ssh_sftp_loop_iteration() < 0)
return 1;
bufsize = backend_sendbuffer(backend);
}
return 0;
}
}
int scp_send_finish(void)
{
if (using_sftp) {
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
while (!xfer_done(scp_sftp_xfer)) {
pktin = sftp_recv();
int ret = xfer_upload_gotpkt(scp_sftp_xfer, pktin);
if (ret <= 0) {
tell_user(stderr, "error while writing: %s", fxp_error());
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
errs++;
return 1;
}
}
xfer_cleanup(scp_sftp_xfer);
if (!scp_sftp_filehandle) {
return 1;
}
if (scp_has_times) {
attrs.flags = SSH_FILEXFER_ATTR_ACMODTIME;
attrs.atime = scp_sftp_atime;
attrs.mtime = scp_sftp_mtime;
req = fxp_fsetstat_send(scp_sftp_filehandle, attrs);
pktin = sftp_wait_for_reply(req);
bool ret = fxp_fsetstat_recv(pktin, req);
if (!ret) {
tell_user(stderr, "unable to set file times: %s", fxp_error());
errs++;
}
}
req = fxp_close_send(scp_sftp_filehandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
scp_has_times = false;
return 0;
} else {
backend_send(backend, "", 1);
return response();
}
}
char *scp_save_remotepath(void)
{
if (using_sftp)
return scp_sftp_remotepath;
else
return NULL;
}
void scp_restore_remotepath(char *data)
{
if (using_sftp)
scp_sftp_remotepath = data;
}
int scp_send_dirname(const char *name, int modes)
{
if (using_sftp) {
char *fullname;
char const *err;
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
bool ret;
if (scp_sftp_targetisdir) {
fullname = dupcat(scp_sftp_remotepath, "/", name);
} else {
fullname = dupstr(scp_sftp_remotepath);
}
/*
* We don't worry about whether we managed to create the
* directory, because if it exists already it's OK just to
* use it. Instead, we will stat it afterwards, and if it
* exists and is a directory we will assume we were either
* successful or it didn't matter.
*/
req = fxp_mkdir_send(fullname, NULL);
pktin = sftp_wait_for_reply(req);
ret = fxp_mkdir_recv(pktin, req);
if (!ret)
err = fxp_error();
else
err = "server reported no error";
req = fxp_stat_send(fullname);
pktin = sftp_wait_for_reply(req);
ret = fxp_stat_recv(pktin, req, &attrs);
if (!ret || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) ||
!(attrs.permissions & 0040000)) {
tell_user(stderr, "unable to create directory %s: %s",
fullname, err);
sfree(fullname);
errs++;
return 1;
}
scp_sftp_remotepath = fullname;
return 0;
} else {
char buf[40];
sprintf(buf, "D%04o 0 ", modes);
backend_send(backend, buf, strlen(buf));
backend_send(backend, name, strlen(name));
backend_send(backend, "\n", 1);
return response();
}
}
int scp_send_enddir(void)
{
if (using_sftp) {
sfree(scp_sftp_remotepath);
return 0;
} else {
backend_send(backend, "E\n", 2);
return response();
}
}
/*
* Yes, I know; I have an scp_sink_setup _and_ an scp_sink_init.
* That's bad. The difference is that scp_sink_setup is called once