putty/pscp.c at master · github/putty · GitHub

This repository was archived by the owner on Oct 20, 2023. It is now read-only.

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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

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