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putty/psftp.c

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84 KiB
C
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/*
* psftp.c: (platform-independent) front end for PSFTP.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <assert.h>
#include <limits.h>
#include "putty.h"
#include "psftp.h"
#include "storage.h"
#include "ssh.h"
#include "sftp.h"
const char *const appname = "PSFTP";
/*
* Since SFTP is a request-response oriented protocol, it requires
* no buffer management: when we send data, we stop and wait for an
* acknowledgement _anyway_, and so we can't possibly overfill our
* send buffer.
*/
static int psftp_connect(char *userhost, char *user, int portnumber);
static int do_sftp_init(void);
static void do_sftp_cleanup(void);
/* ----------------------------------------------------------------------
* sftp client state.
*/
static char *pwd, *homedir;
static LogContext *psftp_logctx = NULL;
static Backend *backend;
static Conf *conf;
static bool sent_eof = false;
/* ------------------------------------------------------------
* Seat vtable.
*/
static size_t psftp_output(Seat *, bool is_stderr, const void *, size_t);
static bool psftp_eof(Seat *);
static const SeatVtable psftp_seat_vt = {
psftp_output,
psftp_eof,
filexfer_get_userpass_input,
nullseat_notify_remote_exit,
console_connection_fatal,
nullseat_update_specials_menu,
nullseat_get_ttymode,
nullseat_set_busy_status,
console_verify_ssh_host_key,
console_confirm_weak_crypto_primitive,
console_confirm_weak_cached_hostkey,
nullseat_is_never_utf8,
nullseat_echoedit_update,
nullseat_get_x_display,
nullseat_get_windowid,
nullseat_get_window_pixel_size,
console_stripctrl_new,
nullseat_set_trust_status_vacuously,
cmdline_seat_verbose,
nullseat_interactive_yes,
};
static Seat psftp_seat[1] = {{ &psftp_seat_vt }};
/* ----------------------------------------------------------------------
* 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)
/* ----------------------------------------------------------------------
* Manage sending requests and waiting for replies.
*/
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(
psftp_seat, "did not receive SFTP response packet from server");
}
rreq = sftp_find_request(pktin);
if (rreq != req) {
seat_connection_fatal(
psftp_seat,
"unable to understand SFTP response packet from server: %s",
fxp_error());
}
return pktin;
}
/* ----------------------------------------------------------------------
* Higher-level helper functions used in commands.
*/
/*
* Attempt to canonify a pathname starting from the pwd. If
* canonification fails, at least fall back to returning a _valid_
* pathname (though it may be ugly, eg /home/simon/../foobar).
*/
char *canonify(const char *name)
{
char *fullname, *canonname;
struct sftp_packet *pktin;
struct sftp_request *req;
if (name[0] == '/') {
fullname = dupstr(name);
} else {
const char *slash;
if (pwd[strlen(pwd) - 1] == '/')
slash = "";
else
slash = "/";
fullname = dupcat(pwd, slash, name);
}
req = fxp_realpath_send(fullname);
pktin = sftp_wait_for_reply(req);
canonname = fxp_realpath_recv(pktin, req);
if (canonname) {
sfree(fullname);
return canonname;
} else {
/*
* Attempt number 2. Some FXP_REALPATH implementations
* (glibc-based ones, in particular) require the _whole_
* path to point to something that exists, whereas others
* (BSD-based) only require all but the last component to
* exist. So if the first call failed, we should strip off
* everything from the last slash onwards and try again,
* then put the final component back on.
*
* Special cases:
*
* - if the last component is "/." or "/..", then we don't
* bother trying this because there's no way it can work.
*
* - if the thing actually ends with a "/", we remove it
* before we start. Except if the string is "/" itself
* (although I can't see why we'd have got here if so,
* because surely "/" would have worked the first
* time?), in which case we don't bother.
*
* - if there's no slash in the string at all, give up in
* confusion (we expect at least one because of the way
* we constructed the string).
*/
int i;
char *returnname;
i = strlen(fullname);
if (i > 2 && fullname[i - 1] == '/')
fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */
while (i > 0 && fullname[--i] != '/');
/*
* Give up on special cases.
*/
if (fullname[i] != '/' || /* no slash at all */
!strcmp(fullname + i, "/.") || /* ends in /. */
!strcmp(fullname + i, "/..") || /* ends in /.. */
!strcmp(fullname, "/")) {
return fullname;
}
/*
* Now i points at the slash. Deal with the final special
* case i==0 (ie the whole path was "/nonexistentfile").
*/
fullname[i] = '\0'; /* separate the string */
if (i == 0) {
req = fxp_realpath_send("/");
} else {
req = fxp_realpath_send(fullname);
}
pktin = sftp_wait_for_reply(req);
canonname = fxp_realpath_recv(pktin, req);
if (!canonname) {
/* Even that failed. Restore our best guess at the
* constructed filename and give up */
fullname[i] = '/'; /* restore slash and last component */
return fullname;
}
/*
* We have a canonical name for all but the last path
* component. Concatenate the last component and return.
*/
returnname = dupcat(canonname,
(strendswith(canonname, "/") ? "" : "/"),
fullname + i + 1);
sfree(fullname);
sfree(canonname);
return returnname;
}
}
static int bare_name_compare(const void *av, const void *bv)
{
const char **a = (const char **) av;
const char **b = (const char **) bv;
return strcmp(*a, *b);
}
static void not_connected(void)
{
printf("psftp: not connected to a host; use \"open host.name\"\n");
}
/* ----------------------------------------------------------------------
* The meat of the `get' and `put' commands.
*/
bool sftp_get_file(char *fname, char *outfname, bool recurse, bool restart)
{
struct fxp_handle *fh;
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_xfer *xfer;
uint64_t offset;
WFile *file;
bool toret, shown_err = false;
struct fxp_attrs attrs;
/*
* In recursive mode, see if we're dealing with a directory.
* (If we're not in recursive mode, we need not even check: the
* subsequent FXP_OPEN will return a usable error message.)
*/
if (recurse) {
bool result;
req = fxp_stat_send(fname);
pktin = sftp_wait_for_reply(req);
result = fxp_stat_recv(pktin, req, &attrs);
if (result &&
(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) &&
(attrs.permissions & 0040000)) {
struct fxp_handle *dirhandle;
size_t nnames, namesize;
struct fxp_name **ournames;
struct fxp_names *names;
int i;
/*
* First, attempt to create the destination directory,
* unless it already exists.
*/
if (file_type(outfname) != FILE_TYPE_DIRECTORY &&
!create_directory(outfname)) {
with_stripctrl(san, outfname)
printf("%s: Cannot create directory\n", san);
return false;
}
/*
* Now get the list of filenames in the remote
* directory.
*/
req = fxp_opendir_send(fname);
pktin = sftp_wait_for_reply(req);
dirhandle = fxp_opendir_recv(pktin, req);
if (!dirhandle) {
with_stripctrl(san, fname)
printf("%s: unable to open directory: %s\n",
san, fxp_error());
return false;
}
nnames = namesize = 0;
ournames = NULL;
while (1) {
int i;
req = fxp_readdir_send(dirhandle);
pktin = sftp_wait_for_reply(req);
names = fxp_readdir_recv(pktin, req);
if (names == NULL) {
if (fxp_error_type() == SSH_FX_EOF)
break;
with_stripctrl(san, fname)
printf("%s: reading directory: %s\n",
san, fxp_error());
req = fxp_close_send(dirhandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
sfree(ournames);
return false;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
sgrowarrayn(ournames, namesize, nnames, names->nnames);
for (i = 0; i < names->nnames; i++)
if (strcmp(names->names[i].filename, ".") &&
strcmp(names->names[i].filename, "..")) {
if (!vet_filename(names->names[i].filename)) {
with_stripctrl(san, names->names[i].filename)
printf("ignoring potentially dangerous server-"
"supplied filename '%s'\n", san);
} else {
ournames[nnames++] =
fxp_dup_name(&names->names[i]);
}
}
fxp_free_names(names);
}
req = fxp_close_send(dirhandle);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
/*
* Sort the names into a clear order. This ought to
* make things more predictable when we're doing a
* reget of the same directory, just in case two
* readdirs on the same remote directory return a
* different order.
*/
if (nnames > 0)
qsort(ournames, nnames, sizeof(*ournames), sftp_name_compare);
/*
* If we're in restart mode, find the last filename on
* this list that already exists. We may have to do a
* reget on _that_ file, but shouldn't have to do
* anything on the previous files.
*
* If none of them exists, of course, we start at 0.
*/
i = 0;
if (restart) {
while (i < nnames) {
char *nextoutfname;
bool nonexistent;
nextoutfname = dir_file_cat(outfname,
ournames[i]->filename);
nonexistent = (file_type(nextoutfname) ==
FILE_TYPE_NONEXISTENT);
sfree(nextoutfname);
if (nonexistent)
break;
i++;
}
if (i > 0)
i--;
}
/*
* Now we're ready to recurse. Starting at ournames[i]
* and continuing on to the end of the list, we
* construct a new source and target file name, and
* call sftp_get_file again.
*/
for (; i < nnames; i++) {
char *nextfname, *nextoutfname;
bool retd;
nextfname = dupcat(fname, "/", ournames[i]->filename);
nextoutfname = dir_file_cat(outfname, ournames[i]->filename);
retd = sftp_get_file(
nextfname, nextoutfname, recurse, restart);
restart = false; /* after first partial file, do full */
sfree(nextoutfname);
sfree(nextfname);
if (!retd) {
for (i = 0; i < nnames; i++) {
fxp_free_name(ournames[i]);
}
sfree(ournames);
return false;
}
}
/*
* Done this recursion level. Free everything.
*/
for (i = 0; i < nnames; i++) {
fxp_free_name(ournames[i]);
}
sfree(ournames);
return true;
}
}
req = fxp_stat_send(fname);
pktin = sftp_wait_for_reply(req);
if (!fxp_stat_recv(pktin, req, &attrs))
attrs.flags = 0;
req = fxp_open_send(fname, SSH_FXF_READ, NULL);
pktin = sftp_wait_for_reply(req);
fh = fxp_open_recv(pktin, req);
if (!fh) {
with_stripctrl(san, fname)
printf("%s: open for read: %s\n", san, fxp_error());
return false;
}
if (restart) {
file = open_existing_wfile(outfname, NULL);
} else {
file = open_new_file(outfname, GET_PERMISSIONS(attrs, -1));
}
if (!file) {
with_stripctrl(san, outfname)
printf("local: unable to open %s\n", san);
req = fxp_close_send(fh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
return false;
}
if (restart) {
if (seek_file(file, 0, FROM_END) == -1) {
close_wfile(file);
with_stripctrl(san, outfname)
printf("reget: cannot restart %s - file too large\n", san);
req = fxp_close_send(fh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
return false;
}
offset = get_file_posn(file);
printf("reget: restarting at file position %"PRIu64"\n", offset);
} else {
offset = 0;
}
with_stripctrl(san, fname) {
with_stripctrl(sano, outfname)
printf("remote:%s => local:%s\n", san, sano);
}
/*
* FIXME: we can use FXP_FSTAT here to get the file size, and
* thus put up a progress bar.
*/
toret = true;
xfer = xfer_download_init(fh, offset);
while (!xfer_done(xfer)) {
void *vbuf;
int retd, len;
int wpos, wlen;
xfer_download_queue(xfer);
pktin = sftp_recv();
retd = xfer_download_gotpkt(xfer, pktin);
if (retd <= 0) {
if (!shown_err) {
printf("error while reading: %s\n", fxp_error());
shown_err = true;
}
if (retd == INT_MIN) /* pktin not even freed */
sfree(pktin);
toret = false;
}
while (xfer_download_data(xfer, &vbuf, &len)) {
unsigned char *buf = (unsigned char *)vbuf;
wpos = 0;
while (wpos < len) {
wlen = write_to_file(file, buf + wpos, len - wpos);
if (wlen <= 0) {
printf("error while writing local file\n");
toret = false;
xfer_set_error(xfer);
break;
}
wpos += wlen;
}
if (wpos < len) { /* we had an error */
toret = false;
xfer_set_error(xfer);
}
sfree(vbuf);
}
}
xfer_cleanup(xfer);
close_wfile(file);
req = fxp_close_send(fh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
return toret;
}
bool sftp_put_file(char *fname, char *outfname, bool recurse, bool restart)
{
struct fxp_handle *fh;
struct fxp_xfer *xfer;
struct sftp_packet *pktin;
struct sftp_request *req;
uint64_t offset;
RFile *file;
bool err = false, eof;
struct fxp_attrs attrs;
long permissions;
/*
* In recursive mode, see if we're dealing with a directory.
* (If we're not in recursive mode, we need not even check: the
* subsequent fopen will return an error message.)
*/
if (recurse && file_type(fname) == FILE_TYPE_DIRECTORY) {
bool result;
size_t nnames, namesize;
char *name, **ournames;
const char *opendir_err;
DirHandle *dh;
size_t i;
/*
* First, attempt to create the destination directory,
* unless it already exists.
*/
req = fxp_stat_send(outfname);
pktin = sftp_wait_for_reply(req);
result = fxp_stat_recv(pktin, req, &attrs);
if (!result ||
!(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) ||
!(attrs.permissions & 0040000)) {
req = fxp_mkdir_send(outfname, NULL);
pktin = sftp_wait_for_reply(req);
result = fxp_mkdir_recv(pktin, req);
if (!result) {
printf("%s: create directory: %s\n",
outfname, fxp_error());
return false;
}
}
/*
* Now get the list of filenames in the local directory.
*/
nnames = namesize = 0;
ournames = NULL;
dh = open_directory(fname, &opendir_err);
if (!dh) {
printf("%s: unable to open directory: %s\n", fname, opendir_err);
return false;
}
while ((name = read_filename(dh)) != NULL) {
sgrowarray(ournames, namesize, nnames);
ournames[nnames++] = name;
}
close_directory(dh);
/*
* Sort the names into a clear order. This ought to make
* things more predictable when we're doing a reput of the
* same directory, just in case two readdirs on the same
* local directory return a different order.
*/
if (nnames > 0)
qsort(ournames, nnames, sizeof(*ournames), bare_name_compare);
/*
* If we're in restart mode, find the last filename on this
* list that already exists. We may have to do a reput on
* _that_ file, but shouldn't have to do anything on the
* previous files.
*
* If none of them exists, of course, we start at 0.
*/
i = 0;
if (restart) {
while (i < nnames) {
char *nextoutfname;
nextoutfname = dupcat(outfname, "/", ournames[i]);
req = fxp_stat_send(nextoutfname);
pktin = sftp_wait_for_reply(req);
result = fxp_stat_recv(pktin, req, &attrs);
sfree(nextoutfname);
if (!result)
break;
i++;
}
if (i > 0)
i--;
}
/*
* Now we're ready to recurse. Starting at ournames[i]
* and continuing on to the end of the list, we
* construct a new source and target file name, and
* call sftp_put_file again.
*/
for (; i < nnames; i++) {
char *nextfname, *nextoutfname;
bool retd;
nextfname = dir_file_cat(fname, ournames[i]);
nextoutfname = dupcat(outfname, "/", ournames[i]);
retd = sftp_put_file(nextfname, nextoutfname, recurse, restart);
restart = false; /* after first partial file, do full */
sfree(nextoutfname);
sfree(nextfname);
if (!retd) {
for (size_t i = 0; i < nnames; i++) {
sfree(ournames[i]);
}
sfree(ournames);
return false;
}
}
/*
* Done this recursion level. Free everything.
*/
for (size_t i = 0; i < nnames; i++) {
sfree(ournames[i]);
}
sfree(ournames);
return true;
}
file = open_existing_file(fname, NULL, NULL, NULL, &permissions);
if (!file) {
printf("local: unable to open %s\n", fname);
return false;
}
attrs.flags = 0;
PUT_PERMISSIONS(attrs, permissions);
if (restart) {
req = fxp_open_send(outfname, SSH_FXF_WRITE, &attrs);
} else {
req = fxp_open_send(outfname,
SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC,
&attrs);
}
pktin = sftp_wait_for_reply(req);
fh = fxp_open_recv(pktin, req);
if (!fh) {
close_rfile(file);
printf("%s: open for write: %s\n", outfname, fxp_error());
return false;
}
if (restart) {
struct fxp_attrs attrs;
bool retd;
req = fxp_fstat_send(fh);
pktin = sftp_wait_for_reply(req);
retd = fxp_fstat_recv(pktin, req, &attrs);
if (!retd) {
printf("read size of %s: %s\n", outfname, fxp_error());
err = true;
goto cleanup;
}
if (!(attrs.flags & SSH_FILEXFER_ATTR_SIZE)) {
printf("read size of %s: size was not given\n", outfname);
err = true;
goto cleanup;
}
offset = attrs.size;
printf("reput: restarting at file position %"PRIu64"\n", offset);
if (seek_file((WFile *)file, offset, FROM_START) != 0)
seek_file((WFile *)file, 0, FROM_END); /* *shrug* */
} else {
offset = 0;
}
printf("local:%s => remote:%s\n", fname, outfname);
/*
* FIXME: we can use FXP_FSTAT here to get the file size, and
* thus put up a progress bar.
*/
xfer = xfer_upload_init(fh, offset);
eof = false;
while ((!err && !eof) || !xfer_done(xfer)) {
char buffer[4096];
int len, ret;
while (xfer_upload_ready(xfer) && !err && !eof) {
len = read_from_file(file, buffer, sizeof(buffer));
if (len == -1) {
printf("error while reading local file\n");
err = true;
} else if (len == 0) {
eof = true;
} else {
xfer_upload_data(xfer, buffer, len);
}
}
if (!xfer_done(xfer)) {
pktin = sftp_recv();
ret = xfer_upload_gotpkt(xfer, pktin);
if (ret <= 0) {
if (ret == INT_MIN) /* pktin not even freed */
sfree(pktin);
if (!err) {
printf("error while writing: %s\n", fxp_error());
err = true;
}
}
}
}
xfer_cleanup(xfer);
cleanup:
req = fxp_close_send(fh);
pktin = sftp_wait_for_reply(req);
if (!fxp_close_recv(pktin, req)) {
if (!err) {
printf("error while closing: %s", fxp_error());
err = true;
}
}
close_rfile(file);
return !err;
}
/* ----------------------------------------------------------------------
* A remote wildcard matcher, providing a similar interface to the
* local one in psftp.h.
*/
typedef struct SftpWildcardMatcher {
struct fxp_handle *dirh;
struct fxp_names *names;
int namepos;
char *wildcard, *prefix;
} SftpWildcardMatcher;
SftpWildcardMatcher *sftp_begin_wildcard_matching(char *name)
{
struct sftp_packet *pktin;
struct sftp_request *req;
char *wildcard;
char *unwcdir, *tmpdir, *cdir;
int len;
bool check;
SftpWildcardMatcher *swcm;
struct fxp_handle *dirh;
/*
* We don't handle multi-level wildcards; so we expect to find
* a fully specified directory part, followed by a wildcard
* after that.
*/
wildcard = stripslashes(name, false);
unwcdir = dupstr(name);
len = wildcard - name;
unwcdir[len] = '\0';
if (len > 0 && unwcdir[len-1] == '/')
unwcdir[len-1] = '\0';
tmpdir = snewn(1 + len, char);
check = wc_unescape(tmpdir, unwcdir);
sfree(tmpdir);
if (!check) {
printf("Multiple-level wildcards are not supported\n");
sfree(unwcdir);
return NULL;
}
cdir = canonify(unwcdir);
req = fxp_opendir_send(cdir);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (dirh) {
swcm = snew(SftpWildcardMatcher);
swcm->dirh = dirh;
swcm->names = NULL;
swcm->wildcard = dupstr(wildcard);
swcm->prefix = unwcdir;
} else {
printf("Unable to open %s: %s\n", cdir, fxp_error());
swcm = NULL;
sfree(unwcdir);
}
sfree(cdir);
return swcm;
}
char *sftp_wildcard_get_filename(SftpWildcardMatcher *swcm)
{
struct fxp_name *name;
struct sftp_packet *pktin;
struct sftp_request *req;
while (1) {
if (swcm->names && swcm->namepos >= swcm->names->nnames) {
fxp_free_names(swcm->names);
swcm->names = NULL;
}
if (!swcm->names) {
req = fxp_readdir_send(swcm->dirh);
pktin = sftp_wait_for_reply(req);
swcm->names = fxp_readdir_recv(pktin, req);
if (!swcm->names) {
if (fxp_error_type() != SSH_FX_EOF) {
with_stripctrl(san, swcm->prefix)
printf("%s: reading directory: %s\n",
san, fxp_error());
}
return NULL;
} else if (swcm->names->nnames == 0) {
/*
* Another failure mode which we treat as EOF is if
* the server reports success from FXP_READDIR but
* returns no actual names. This is unusual, since
* from most servers you'd expect at least "." and
* "..", but there's nothing forbidding a server from
* omitting those if it wants to.
*/
return NULL;
}
swcm->namepos = 0;
}
assert(swcm->names && swcm->namepos < swcm->names->nnames);
name = &swcm->names->names[swcm->namepos++];
if (!strcmp(name->filename, ".") || !strcmp(name->filename, ".."))
continue; /* expected bad filenames */
if (!vet_filename(name->filename)) {
with_stripctrl(san, name->filename)
printf("ignoring potentially dangerous server-"
"supplied filename '%s'\n", san);
continue; /* unexpected bad filename */
}
if (!wc_match(swcm->wildcard, name->filename))
continue; /* doesn't match the wildcard */
/*
* We have a working filename. Return it.
*/
return dupprintf("%s%s%s", swcm->prefix,
(!swcm->prefix[0] ||
swcm->prefix[strlen(swcm->prefix)-1]=='/' ?
"" : "/"),
name->filename);
}
}
void sftp_finish_wildcard_matching(SftpWildcardMatcher *swcm)
{
struct sftp_packet *pktin;
struct sftp_request *req;
req = fxp_close_send(swcm->dirh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
if (swcm->names)
fxp_free_names(swcm->names);
sfree(swcm->prefix);
sfree(swcm->wildcard);
sfree(swcm);
}
/*
* General function to match a potential wildcard in a filename
* argument and iterate over every matching file. Used in several
* PSFTP commands (rmdir, rm, chmod, mv).
*/
bool wildcard_iterate(char *filename, bool (*func)(void *, char *), void *ctx)
{
char *unwcfname, *newname, *cname;
bool is_wc, toret;
unwcfname = snewn(strlen(filename)+1, char);
is_wc = !wc_unescape(unwcfname, filename);
if (is_wc) {
SftpWildcardMatcher *swcm = sftp_begin_wildcard_matching(filename);
bool matched = false;
sfree(unwcfname);
if (!swcm)
return false;
toret = true;
while ( (newname = sftp_wildcard_get_filename(swcm)) != NULL ) {
cname = canonify(newname);
sfree(newname);
matched = true;
if (!func(ctx, cname))
toret = false;
sfree(cname);
}
if (!matched) {
/* Politely warn the user that nothing matched. */
printf("%s: nothing matched\n", filename);
}
sftp_finish_wildcard_matching(swcm);
} else {
cname = canonify(unwcfname);
toret = func(ctx, cname);
sfree(cname);
sfree(unwcfname);
}
return toret;
}
/*
* Handy helper function.
*/
bool is_wildcard(char *name)
{
char *unwcfname = snewn(strlen(name)+1, char);
bool is_wc = !wc_unescape(unwcfname, name);
sfree(unwcfname);
return is_wc;
}
/* ----------------------------------------------------------------------
* Actual sftp commands.
*/
struct sftp_command {
char **words;
size_t nwords, wordssize;
int (*obey) (struct sftp_command *); /* returns <0 to quit */
};
int sftp_cmd_null(struct sftp_command *cmd)
{
return 1; /* success */
}
int sftp_cmd_unknown(struct sftp_command *cmd)
{
printf("psftp: unknown command \"%s\"\n", cmd->words[0]);
return 0; /* failure */
}
int sftp_cmd_quit(struct sftp_command *cmd)
{
return -1;
}
int sftp_cmd_close(struct sftp_command *cmd)
{
if (!backend) {
not_connected();
return 0;
}
if (backend_connected(backend)) {
char ch;
backend_special(backend, SS_EOF, 0);
sent_eof = true;
sftp_recvdata(&ch, 1);
}
do_sftp_cleanup();
return 0;
}
void list_directory_from_sftp_warn_unsorted(void)
{
printf("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);
}
/*
* List a directory. If no arguments are given, list pwd; otherwise
* list the directory given in words[1].
*/
int sftp_cmd_ls(struct sftp_command *cmd)
{
struct fxp_handle *dirh;
struct fxp_names *names;
const char *dir;
char *cdir, *unwcdir, *wildcard;
struct sftp_packet *pktin;
struct sftp_request *req;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 2)
dir = ".";
else
dir = cmd->words[1];
unwcdir = snewn(1 + strlen(dir), char);
if (wc_unescape(unwcdir, dir)) {
dir = unwcdir;
wildcard = NULL;
} else {
char *tmpdir;
int len;
bool check;
sfree(unwcdir);
wildcard = stripslashes(dir, false);
unwcdir = dupstr(dir);
len = wildcard - dir;
unwcdir[len] = '\0';
if (len > 0 && unwcdir[len-1] == '/')
unwcdir[len-1] = '\0';
tmpdir = snewn(1 + len, char);
check = wc_unescape(tmpdir, unwcdir);
sfree(tmpdir);
if (!check) {
printf("Multiple-level wildcards are not supported\n");
sfree(unwcdir);
return 0;
}
dir = unwcdir;
}
cdir = canonify(dir);
with_stripctrl(san, cdir)
printf("Listing directory %s\n", san);
req = fxp_opendir_send(cdir);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (dirh == NULL) {
printf("Unable to open %s: %s\n", dir, fxp_error());
sfree(cdir);
sfree(unwcdir);
return 0;
} 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", dir, fxp_error());
break;
}
if (names->nnames == 0) {
fxp_free_names(names);
break;
}
for (size_t i = 0; i < names->nnames; i++)
if (!wildcard || wc_match(wildcard, names->names[i].filename))
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);
}
sfree(cdir);
sfree(unwcdir);
return 1;
}
/*
* Change directories. We do this by canonifying the new name, then
* trying to OPENDIR it. Only if that succeeds do we set the new pwd.
*/
int sftp_cmd_cd(struct sftp_command *cmd)
{
struct fxp_handle *dirh;
struct sftp_packet *pktin;
struct sftp_request *req;
char *dir;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 2)
dir = dupstr(homedir);
else {
dir = canonify(cmd->words[1]);
}
req = fxp_opendir_send(dir);
pktin = sftp_wait_for_reply(req);
dirh = fxp_opendir_recv(pktin, req);
if (!dirh) {
with_stripctrl(san, dir)
printf("Directory %s: %s\n", san, fxp_error());
sfree(dir);
return 0;
}
req = fxp_close_send(dirh);
pktin = sftp_wait_for_reply(req);
fxp_close_recv(pktin, req);
sfree(pwd);
pwd = dir;
with_stripctrl(san, pwd)
printf("Remote directory is now %s\n", san);
return 1;
}
/*
* Print current directory. Easy as pie.
*/
int sftp_cmd_pwd(struct sftp_command *cmd)
{
if (!backend) {
not_connected();
return 0;
}
with_stripctrl(san, pwd)
printf("Remote directory is %s\n", san);
return 1;
}
/*
* Get a file and save it at the local end. We have three very
* similar commands here. The basic one is `get'; `reget' differs
* in that it checks for the existence of the destination file and
* starts from where a previous aborted transfer left off; `mget'
* differs in that it interprets all its arguments as files to
* transfer (never as a different local name for a remote file) and
* can handle wildcards.
*/
int sftp_general_get(struct sftp_command *cmd, bool restart, bool multiple)
{
char *fname, *unwcfname, *origfname, *origwfname, *outfname;
int i, toret;
bool recurse = false;
if (!backend) {
not_connected();
return 0;
}
i = 1;
while (i < cmd->nwords && cmd->words[i][0] == '-') {
if (!strcmp(cmd->words[i], "--")) {
/* finish processing options */
i++;
break;
} else if (!strcmp(cmd->words[i], "-r")) {
recurse = true;
} else {
printf("%s: unrecognised option '%s'\n", cmd->words[0], cmd->words[i]);
return 0;
}
i++;
}
if (i >= cmd->nwords) {
printf("%s: expects a filename\n", cmd->words[0]);
return 0;
}
toret = 1;
do {
SftpWildcardMatcher *swcm;
origfname = cmd->words[i++];
unwcfname = snewn(strlen(origfname)+1, char);
if (multiple && !wc_unescape(unwcfname, origfname)) {
swcm = sftp_begin_wildcard_matching(origfname);
if (!swcm) {
sfree(unwcfname);
continue;
}
origwfname = sftp_wildcard_get_filename(swcm);
if (!origwfname) {
/* Politely warn the user that nothing matched. */
printf("%s: nothing matched\n", origfname);
sftp_finish_wildcard_matching(swcm);
sfree(unwcfname);
continue;
}
} else {
origwfname = origfname;
swcm = NULL;
}
while (origwfname) {
fname = canonify(origwfname);
if (!multiple && i < cmd->nwords)
outfname = cmd->words[i++];
else
outfname = stripslashes(origwfname, false);
toret = sftp_get_file(fname, outfname, recurse, restart);
sfree(fname);
if (swcm) {
sfree(origwfname);
origwfname = sftp_wildcard_get_filename(swcm);
} else {
origwfname = NULL;
}
}
sfree(unwcfname);
if (swcm)
sftp_finish_wildcard_matching(swcm);
if (!toret)
return toret;
} while (multiple && i < cmd->nwords);
return toret;
}
int sftp_cmd_get(struct sftp_command *cmd)
{
return sftp_general_get(cmd, false, false);
}
int sftp_cmd_mget(struct sftp_command *cmd)
{
return sftp_general_get(cmd, false, true);
}
int sftp_cmd_reget(struct sftp_command *cmd)
{
return sftp_general_get(cmd, true, false);
}
/*
* Send a file and store it at the remote end. We have three very
* similar commands here. The basic one is `put'; `reput' differs
* in that it checks for the existence of the destination file and
* starts from where a previous aborted transfer left off; `mput'
* differs in that it interprets all its arguments as files to
* transfer (never as a different remote name for a local file) and
* can handle wildcards.
*/
int sftp_general_put(struct sftp_command *cmd, bool restart, bool multiple)
{
char *fname, *wfname, *origoutfname, *outfname;
int i;
int toret;
bool recurse = false;
if (!backend) {
not_connected();
return 0;
}
i = 1;
while (i < cmd->nwords && cmd->words[i][0] == '-') {
if (!strcmp(cmd->words[i], "--")) {
/* finish processing options */
i++;
break;
} else if (!strcmp(cmd->words[i], "-r")) {
recurse = true;
} else {
printf("%s: unrecognised option '%s'\n", cmd->words[0], cmd->words[i]);
return 0;
}
i++;
}
if (i >= cmd->nwords) {
printf("%s: expects a filename\n", cmd->words[0]);
return 0;
}
toret = 1;
do {
WildcardMatcher *wcm;
fname = cmd->words[i++];
if (multiple && test_wildcard(fname, false) == WCTYPE_WILDCARD) {
wcm = begin_wildcard_matching(fname);
wfname = wildcard_get_filename(wcm);
if (!wfname) {
/* Politely warn the user that nothing matched. */
printf("%s: nothing matched\n", fname);
finish_wildcard_matching(wcm);
continue;
}
} else {
wfname = fname;
wcm = NULL;
}
while (wfname) {
if (!multiple && i < cmd->nwords)
origoutfname = cmd->words[i++];
else
origoutfname = stripslashes(wfname, true);
outfname = canonify(origoutfname);
toret = sftp_put_file(wfname, outfname, recurse, restart);
sfree(outfname);
if (wcm) {
sfree(wfname);
wfname = wildcard_get_filename(wcm);
} else {
wfname = NULL;
}
}
if (wcm)
finish_wildcard_matching(wcm);
if (!toret)
return toret;
} while (multiple && i < cmd->nwords);
return toret;
}
int sftp_cmd_put(struct sftp_command *cmd)
{
return sftp_general_put(cmd, false, false);
}
int sftp_cmd_mput(struct sftp_command *cmd)
{
return sftp_general_put(cmd, false, true);
}
int sftp_cmd_reput(struct sftp_command *cmd)
{
return sftp_general_put(cmd, true, false);
}
int sftp_cmd_mkdir(struct sftp_command *cmd)
{
char *dir;
struct sftp_packet *pktin;
struct sftp_request *req;
bool result;
int i, ret;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 2) {
printf("mkdir: expects a directory\n");
return 0;
}
ret = 1;
for (i = 1; i < cmd->nwords; i++) {
dir = canonify(cmd->words[i]);
req = fxp_mkdir_send(dir, NULL);
pktin = sftp_wait_for_reply(req);
result = fxp_mkdir_recv(pktin, req);
if (!result) {
with_stripctrl(san, dir)
printf("mkdir %s: %s\n", san, fxp_error());
ret = 0;
} else
with_stripctrl(san, dir)
printf("mkdir %s: OK\n", san);
sfree(dir);
}
return ret;
}
static bool sftp_action_rmdir(void *vctx, char *dir)
{
struct sftp_packet *pktin;
struct sftp_request *req;
bool result;
req = fxp_rmdir_send(dir);
pktin = sftp_wait_for_reply(req);
result = fxp_rmdir_recv(pktin, req);
if (!result) {
printf("rmdir %s: %s\n", dir, fxp_error());
return false;
}
printf("rmdir %s: OK\n", dir);
return true;
}
int sftp_cmd_rmdir(struct sftp_command *cmd)
{
int i, ret;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 2) {
printf("rmdir: expects a directory\n");
return 0;
}
ret = 1;
for (i = 1; i < cmd->nwords; i++)
ret &= wildcard_iterate(cmd->words[i], sftp_action_rmdir, NULL);
return ret;
}
static bool sftp_action_rm(void *vctx, char *fname)
{
struct sftp_packet *pktin;
struct sftp_request *req;
bool result;
req = fxp_remove_send(fname);
pktin = sftp_wait_for_reply(req);
result = fxp_remove_recv(pktin, req);
if (!result) {
printf("rm %s: %s\n", fname, fxp_error());
return false;
}
printf("rm %s: OK\n", fname);
return true;
}
int sftp_cmd_rm(struct sftp_command *cmd)
{
int i, ret;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 2) {
printf("rm: expects a filename\n");
return 0;
}
ret = 1;
for (i = 1; i < cmd->nwords; i++)
ret &= wildcard_iterate(cmd->words[i], sftp_action_rm, NULL);
return ret;
}
static bool check_is_dir(char *dstfname)
{
struct sftp_packet *pktin;
struct sftp_request *req;
struct fxp_attrs attrs;
bool result;
req = fxp_stat_send(dstfname);
pktin = sftp_wait_for_reply(req);
result = fxp_stat_recv(pktin, req, &attrs);
if (result &&
(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) &&
(attrs.permissions & 0040000))
return true;
else
return false;
}
struct sftp_context_mv {
char *dstfname;
bool dest_is_dir;
};
static bool sftp_action_mv(void *vctx, char *srcfname)
{
struct sftp_context_mv *ctx = (struct sftp_context_mv *)vctx;
struct sftp_packet *pktin;
struct sftp_request *req;
const char *error;
char *finalfname, *newcanon = NULL;
bool toret, result;
if (ctx->dest_is_dir) {
char *p;
char *newname;
p = srcfname + strlen(srcfname);
while (p > srcfname && p[-1] != '/') p--;
newname = dupcat(ctx->dstfname, "/", p);
newcanon = canonify(newname);
sfree(newname);
finalfname = newcanon;
} else {
finalfname = ctx->dstfname;
}
req = fxp_rename_send(srcfname, finalfname);
pktin = sftp_wait_for_reply(req);
result = fxp_rename_recv(pktin, req);
error = result ? NULL : fxp_error();
if (error) {
with_stripctrl(san, finalfname)
printf("mv %s %s: %s\n", srcfname, san, error);
toret = false;
} else {
with_stripctrl(san, finalfname)
printf("%s -> %s\n", srcfname, san);
toret = true;
}
sfree(newcanon);
return toret;
}
int sftp_cmd_mv(struct sftp_command *cmd)
{
struct sftp_context_mv ctx[1];
int i, ret;
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 3) {
printf("mv: expects two filenames\n");
return 0;
}
ctx->dstfname = canonify(cmd->words[cmd->nwords-1]);
/*
* If there's more than one source argument, or one source
* argument which is a wildcard, we _require_ that the
* destination is a directory.
*/
ctx->dest_is_dir = check_is_dir(ctx->dstfname);
if ((cmd->nwords > 3 || is_wildcard(cmd->words[1])) && !ctx->dest_is_dir) {
printf("mv: multiple or wildcard arguments require the destination"
" to be a directory\n");
sfree(ctx->dstfname);
return 0;
}
/*
* Now iterate over the source arguments.
*/
ret = 1;
for (i = 1; i < cmd->nwords-1; i++)
ret &= wildcard_iterate(cmd->words[i], sftp_action_mv, ctx);
sfree(ctx->dstfname);
return ret;
}
struct sftp_context_chmod {
unsigned attrs_clr, attrs_xor;
};
static bool sftp_action_chmod(void *vctx, char *fname)
{
struct fxp_attrs attrs;
struct sftp_packet *pktin;
struct sftp_request *req;
bool result;
unsigned oldperms, newperms;
struct sftp_context_chmod *ctx = (struct sftp_context_chmod *)vctx;
req = fxp_stat_send(fname);
pktin = sftp_wait_for_reply(req);
result = fxp_stat_recv(pktin, req, &attrs);
if (!result || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) {
printf("get attrs for %s: %s\n", fname,
result ? "file permissions not provided" : fxp_error());
return false;
}
attrs.flags = SSH_FILEXFER_ATTR_PERMISSIONS; /* perms _only_ */
oldperms = attrs.permissions & 07777;
attrs.permissions &= ~ctx->attrs_clr;
attrs.permissions ^= ctx->attrs_xor;
newperms = attrs.permissions & 07777;
if (oldperms == newperms)
return true; /* no need to do anything! */
req = fxp_setstat_send(fname, attrs);
pktin = sftp_wait_for_reply(req);
result = fxp_setstat_recv(pktin, req);
if (!result) {
printf("set attrs for %s: %s\n", fname, fxp_error());
return false;
}
printf("%s: %04o -> %04o\n", fname, oldperms, newperms);
return true;
}
int sftp_cmd_chmod(struct sftp_command *cmd)
{
char *mode;
int i, ret;
struct sftp_context_chmod ctx[1];
if (!backend) {
not_connected();
return 0;
}
if (cmd->nwords < 3) {
printf("chmod: expects a mode specifier and a filename\n");
return 0;
}
/*
* Attempt to parse the mode specifier in cmd->words[1]. We
* don't support the full horror of Unix chmod; instead we
* support a much simpler syntax in which the user can either
* specify an octal number, or a comma-separated sequence of
* [ugoa]*[-+=][rwxst]+. (The initial [ugoa] sequence may
* _only_ be omitted if the only attribute mentioned is t,
* since all others require a user/group/other specification.
* Additionally, the s attribute may not be specified for any
* [ugoa] specifications other than exactly u or exactly g.
*/
ctx->attrs_clr = ctx->attrs_xor = 0;
mode = cmd->words[1];
if (mode[0] >= '0' && mode[0] <= '9') {
if (mode[strspn(mode, "01234567")]) {
printf("chmod: numeric file modes should"
" contain digits 0-7 only\n");
return 0;
}
ctx->attrs_clr = 07777;
sscanf(mode, "%o", &ctx->attrs_xor);
ctx->attrs_xor &= ctx->attrs_clr;
} else {
while (*mode) {
char *modebegin = mode;
unsigned subset, perms;
int action;
subset = 0;
while (*mode && *mode != ',' &&
*mode != '+' && *mode != '-' && *mode != '=') {
switch (*mode) {
case 'u': subset |= 04700; break; /* setuid, user perms */
case 'g': subset |= 02070; break; /* setgid, group perms */
case 'o': subset |= 00007; break; /* just other perms */
case 'a': subset |= 06777; break; /* all of the above */
default:
printf("chmod: file mode '%.*s' contains unrecognised"
" user/group/other specifier '%c'\n",
(int)strcspn(modebegin, ","), modebegin, *mode);
return 0;
}
mode++;
}
if (!*mode || *mode == ',') {
printf("chmod: file mode '%.*s' is incomplete\n",
(int)strcspn(modebegin, ","), modebegin);
return 0;
}
action = *mode++;
if (!*mode || *mode == ',') {
printf("chmod: file mode '%.*s' is incomplete\n",
(int)strcspn(modebegin, ","), modebegin);
return 0;
}
perms = 0;
while (*mode && *mode != ',') {
switch (*mode) {
case 'r': perms |= 00444; break;
case 'w': perms |= 00222; break;
case 'x': perms |= 00111; break;
case 't': perms |= 01000; subset |= 01000; break;
case 's':
if ((subset & 06777) != 04700 &&
(subset & 06777) != 02070) {
printf("chmod: file mode '%.*s': set[ug]id bit should"
" be used with exactly one of u or g only\n",
(int)strcspn(modebegin, ","), modebegin);
return 0;
}
perms |= 06000;
break;
default:
printf("chmod: file mode '%.*s' contains unrecognised"
" permission specifier '%c'\n",
(int)strcspn(modebegin, ","), modebegin, *mode);
return 0;
}
mode++;
}
if (!(subset & 06777) && (perms &~ subset)) {
printf("chmod: file mode '%.*s' contains no user/group/other"
" specifier and permissions other than 't' \n",
(int)strcspn(modebegin, ","), modebegin);
return 0;
}
perms &= subset;
switch (action) {
case '+':
ctx->attrs_clr |= perms;
ctx->attrs_xor |= perms;
break;
case '-':
ctx->attrs_clr |= perms;
ctx->attrs_xor &= ~perms;
break;
case '=':
ctx->attrs_clr |= subset;
ctx->attrs_xor |= perms;
break;
}
if (*mode) mode++; /* eat comma */
}
}
ret = 1;
for (i = 2; i < cmd->nwords; i++)
ret &= wildcard_iterate(cmd->words[i], sftp_action_chmod, ctx);
return ret;
}
static int sftp_cmd_open(struct sftp_command *cmd)
{
int portnumber;
if (backend) {
printf("psftp: already connected\n");
return 0;
}
if (cmd->nwords < 2) {
printf("open: expects a host name\n");
return 0;
}
if (cmd->nwords > 2) {
portnumber = atoi(cmd->words[2]);
if (portnumber == 0) {
printf("open: invalid port number\n");
return 0;
}
} else
portnumber = 0;
if (psftp_connect(cmd->words[1], NULL, portnumber)) {
backend = NULL; /* connection is already closed */
return -1; /* this is fatal */
}
do_sftp_init();
return 1;
}
static int sftp_cmd_lcd(struct sftp_command *cmd)
{
char *currdir, *errmsg;
if (cmd->nwords < 2) {
printf("lcd: expects a local directory name\n");
return 0;
}
errmsg = psftp_lcd(cmd->words[1]);
if (errmsg) {
printf("lcd: unable to change directory: %s\n", errmsg);
sfree(errmsg);
return 0;
}
currdir = psftp_getcwd();
printf("New local directory is %s\n", currdir);
sfree(currdir);
return 1;
}
static int sftp_cmd_lpwd(struct sftp_command *cmd)
{
char *currdir;
currdir = psftp_getcwd();
printf("Current local directory is %s\n", currdir);
sfree(currdir);
return 1;
}
static int sftp_cmd_pling(struct sftp_command *cmd)
{
int exitcode;
exitcode = system(cmd->words[1]);
return (exitcode == 0);
}
static int sftp_cmd_help(struct sftp_command *cmd);
static struct sftp_cmd_lookup {
const char *name;
/*
* For help purposes, there are two kinds of command:
*
* - primary commands, in which `longhelp' is non-NULL. In
* this case `shorthelp' is descriptive text, and `longhelp'
* is longer descriptive text intended to be printed after
* the command name.
*
* - alias commands, in which `longhelp' is NULL. In this case
* `shorthelp' is the name of a primary command, which
* contains the help that should double up for this command.
*/
bool listed; /* do we list this in primary help? */
const char *shorthelp;
const char *longhelp;
int (*obey) (struct sftp_command *);
} sftp_lookup[] = {
/*
* List of sftp commands. This is binary-searched so it MUST be
* in ASCII order.
*/
{
"!", true, "run a local command",
"<command>\n"
/* FIXME: this example is crap for non-Windows. */
" Runs a local command. For example, \"!del myfile\".\n",
sftp_cmd_pling
},
{
"bye", true, "finish your SFTP session",
"\n"
" Terminates your SFTP session and quits the PSFTP program.\n",
sftp_cmd_quit
},
{
"cd", true, "change your remote working directory",
" [ <new working directory> ]\n"
" Change the remote working directory for your SFTP session.\n"
" If a new working directory is not supplied, you will be\n"
" returned to your home directory.\n",
sftp_cmd_cd
},
{
"chmod", true, "change file permissions and modes",
" <modes> <filename-or-wildcard> [ <filename-or-wildcard>... ]\n"
" Change the file permissions on one or more remote files or\n"
" directories.\n"
" <modes> can be any octal Unix permission specifier.\n"
" Alternatively, <modes> can include the following modifiers:\n"
" u+r make file readable by owning user\n"
" u+w make file writable by owning user\n"
" u+x make file executable by owning user\n"
" u-r make file not readable by owning user\n"
" [also u-w, u-x]\n"
" g+r make file readable by members of owning group\n"
" [also g+w, g+x, g-r, g-w, g-x]\n"
" o+r make file readable by all other users\n"
" [also o+w, o+x, o-r, o-w, o-x]\n"
" a+r make file readable by absolutely everybody\n"
" [also a+w, a+x, a-r, a-w, a-x]\n"
" u+s enable the Unix set-user-ID bit\n"
" u-s disable the Unix set-user-ID bit\n"
" g+s enable the Unix set-group-ID bit\n"
" g-s disable the Unix set-group-ID bit\n"
" +t enable the Unix \"sticky bit\"\n"
" You can give more than one modifier for the same user (\"g-rwx\"), and\n"
" more than one user for the same modifier (\"ug+w\"). You can\n"
" use commas to separate different modifiers (\"u+rwx,g+s\").\n",
sftp_cmd_chmod
},
{
"close", true, "finish your SFTP session but do not quit PSFTP",
"\n"
" Terminates your SFTP session, but does not quit the PSFTP\n"
" program. You can then use \"open\" to start another SFTP\n"
" session, to the same server or to a different one.\n",
sftp_cmd_close
},
{
"del", true, "delete files on the remote server",
" <filename-or-wildcard> [ <filename-or-wildcard>... ]\n"
" Delete a file or files from the server.\n",
sftp_cmd_rm
},
{
"delete", false, "del", NULL, sftp_cmd_rm
},
{
"dir", true, "list remote files",
" [ <directory-name> ]/[ <wildcard> ]\n"
" List the contents of a specified directory on the server.\n"
" If <directory-name> is not given, the current working directory\n"
" is assumed.\n"
" If <wildcard> is given, it is treated as a set of files to\n"
" list; otherwise, all files are listed.\n",
sftp_cmd_ls
},
{
"exit", true, "bye", NULL, sftp_cmd_quit
},
{
"get", true, "download a file from the server to your local machine",
" [ -r ] [ -- ] <filename> [ <local-filename> ]\n"
" Downloads a file on the server and stores it locally under\n"
" the same name, or under a different one if you supply the\n"
" argument <local-filename>.\n"
" If -r specified, recursively fetch a directory.\n",
sftp_cmd_get
},
{
"help", true, "give help",
" [ <command> [ <command> ... ] ]\n"
" Give general help if no commands are specified.\n"
" If one or more commands are specified, give specific help on\n"
" those particular commands.\n",
sftp_cmd_help
},
{
"lcd", true, "change local working directory",
" <local-directory-name>\n"
" Change the local working directory of the PSFTP program (the\n"
" default location where the \"get\" command will save files).\n",
sftp_cmd_lcd
},
{
"lpwd", true, "print local working directory",
"\n"
" Print the local working directory of the PSFTP program (the\n"
" default location where the \"get\" command will save files).\n",
sftp_cmd_lpwd
},
{
"ls", true, "dir", NULL,
sftp_cmd_ls
},
{
"mget", true, "download multiple files at once",
" [ -r ] [ -- ] <filename-or-wildcard> [ <filename-or-wildcard>... ]\n"
" Downloads many files from the server, storing each one under\n"
" the same name it has on the server side. You can use wildcards\n"
" such as \"*.c\" to specify lots of files at once.\n"
" If -r specified, recursively fetch files and directories.\n",
sftp_cmd_mget
},
{
"mkdir", true, "create directories on the remote server",
" <directory-name> [ <directory-name>... ]\n"
" Creates directories with the given names on the server.\n",
sftp_cmd_mkdir
},
{
"mput", true, "upload multiple files at once",
" [ -r ] [ -- ] <filename-or-wildcard> [ <filename-or-wildcard>... ]\n"
" Uploads many files to the server, storing each one under the\n"
" same name it has on the client side. You can use wildcards\n"
" such as \"*.c\" to specify lots of files at once.\n"
" If -r specified, recursively store files and directories.\n",
sftp_cmd_mput
},
{
"mv", true, "move or rename file(s) on the remote server",
" <source> [ <source>... ] <destination>\n"
" Moves or renames <source>(s) on the server to <destination>,\n"
" also on the server.\n"
" If <destination> specifies an existing directory, then <source>\n"
" may be a wildcard, and multiple <source>s may be given; all\n"
" source files are moved into <destination>.\n"
" Otherwise, <source> must specify a single file, which is moved\n"
" or renamed so that it is accessible under the name <destination>.\n",
sftp_cmd_mv
},
{
"open", true, "connect to a host",
" [<user>@]<hostname> [<port>]\n"
" Establishes an SFTP connection to a given host. Only usable\n"
" when you are not already connected to a server.\n",
sftp_cmd_open
},
{
"put", true, "upload a file from your local machine to the server",
" [ -r ] [ -- ] <filename> [ <remote-filename> ]\n"
" Uploads a file to the server and stores it there under\n"
" the same name, or under a different one if you supply the\n"
" argument <remote-filename>.\n"
" If -r specified, recursively store a directory.\n",
sftp_cmd_put
},
{
"pwd", true, "print your remote working directory",
"\n"
" Print the current remote working directory for your SFTP session.\n",
sftp_cmd_pwd
},
{
"quit", true, "bye", NULL,
sftp_cmd_quit
},
{
"reget", true, "continue downloading files",
" [ -r ] [ -- ] <filename> [ <local-filename> ]\n"
" Works exactly like the \"get\" command, but the local file\n"
" must already exist. The download will begin at the end of the\n"
" file. This is for resuming a download that was interrupted.\n"
" If -r specified, resume interrupted \"get -r\".\n",
sftp_cmd_reget
},
{
"ren", true, "mv", NULL,
sftp_cmd_mv
},
{
"rename", false, "mv", NULL,
sftp_cmd_mv
},
{
"reput", true, "continue uploading files",
" [ -r ] [ -- ] <filename> [ <remote-filename> ]\n"
" Works exactly like the \"put\" command, but the remote file\n"
" must already exist. The upload will begin at the end of the\n"
" file. This is for resuming an upload that was interrupted.\n"
" If -r specified, resume interrupted \"put -r\".\n",
sftp_cmd_reput
},
{
"rm", true, "del", NULL,
sftp_cmd_rm
},
{
"rmdir", true, "remove directories on the remote server",
" <directory-name> [ <directory-name>... ]\n"
" Removes the directory with the given name on the server.\n"
" The directory will not be removed unless it is empty.\n"
" Wildcards may be used to specify multiple directories.\n",
sftp_cmd_rmdir
}
};
const struct sftp_cmd_lookup *lookup_command(const char *name)
{
int i, j, k, cmp;
i = -1;
j = lenof(sftp_lookup);
while (j - i > 1) {
k = (j + i) / 2;
cmp = strcmp(name, sftp_lookup[k].name);
if (cmp < 0)
j = k;
else if (cmp > 0)
i = k;
else {
return &sftp_lookup[k];
}
}
return NULL;
}
static int sftp_cmd_help(struct sftp_command *cmd)
{
int i;
if (cmd->nwords == 1) {
/*
* Give short help on each command.
*/
int maxlen;
maxlen = 0;
for (i = 0; i < lenof(sftp_lookup); i++) {
int len;
if (!sftp_lookup[i].listed)
continue;
len = strlen(sftp_lookup[i].name);
if (maxlen < len)
maxlen = len;
}
for (i = 0; i < lenof(sftp_lookup); i++) {
const struct sftp_cmd_lookup *lookup;
if (!sftp_lookup[i].listed)
continue;
lookup = &sftp_lookup[i];
printf("%-*s", maxlen+2, lookup->name);
if (lookup->longhelp == NULL)
lookup = lookup_command(lookup->shorthelp);
printf("%s\n", lookup->shorthelp);
}
} else {
/*
* Give long help on specific commands.
*/
for (i = 1; i < cmd->nwords; i++) {
const struct sftp_cmd_lookup *lookup;
lookup = lookup_command(cmd->words[i]);
if (!lookup) {
printf("help: %s: command not found\n", cmd->words[i]);
} else {
printf("%s", lookup->name);
if (lookup->longhelp == NULL)
lookup = lookup_command(lookup->shorthelp);
printf("%s", lookup->longhelp);
}
}
}
return 1;
}
/* ----------------------------------------------------------------------
* Command line reading and parsing.
*/
struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags)
{
char *line;
struct sftp_command *cmd;
char *p, *q, *r;
bool quoting;
cmd = snew(struct sftp_command);
cmd->words = NULL;
cmd->nwords = 0;
cmd->wordssize = 0;
line = NULL;
if (fp) {
if (modeflags & 1)
printf("psftp> ");
line = fgetline(fp);
} else {
line = ssh_sftp_get_cmdline("psftp> ", !backend);
}
if (!line || !*line) {
cmd->obey = sftp_cmd_quit;
if ((mode == 0) || (modeflags & 1))
printf("quit\n");
sfree(line);
return cmd; /* eof */
}
line[strcspn(line, "\r\n")] = '\0';
if (modeflags & 1) {
printf("%s\n", line);
}
p = line;
while (*p && (*p == ' ' || *p == '\t'))
p++;
if (*p == '!') {
/*
* Special case: the ! command. This is always parsed as
* exactly two words: one containing the !, and the second
* containing everything else on the line.
*/
cmd->nwords = 2;
sgrowarrayn(cmd->words, cmd->wordssize, cmd->nwords, 0);
cmd->words[0] = dupstr("!");
cmd->words[1] = dupstr(p+1);
} else if (*p == '#') {
/*
* Special case: comment. Entire line is ignored.
*/
cmd->nwords = cmd->wordssize = 0;
} else {
/*
* Parse the command line into words. The syntax is:
* - double quotes are removed, but cause spaces within to be
* treated as non-separating.
* - a double-doublequote pair is a literal double quote, inside
* _or_ outside quotes. Like this:
*
* firstword "second word" "this has ""quotes"" in" and""this""
*
* becomes
*
* >firstword<
* >second word<
* >this has "quotes" in<
* >and"this"<
*/
while (1) {
/* skip whitespace */
while (*p && (*p == ' ' || *p == '\t'))
p++;
/* terminate loop */
if (!*p)
break;
/* mark start of word */
q = r = p; /* q sits at start, r writes word */
quoting = false;
while (*p) {
if (!quoting && (*p == ' ' || *p == '\t'))
break; /* reached end of word */
else if (*p == '"' && p[1] == '"')
p += 2, *r++ = '"'; /* a literal quote */
else if (*p == '"')
p++, quoting = !quoting;
else
*r++ = *p++;
}
if (*p)
p++; /* skip over the whitespace */
*r = '\0';
sgrowarray(cmd->words, cmd->wordssize, cmd->nwords);
cmd->words[cmd->nwords++] = dupstr(q);
}
}
sfree(line);
/*
* Now parse the first word and assign a function.
*/
if (cmd->nwords == 0)
cmd->obey = sftp_cmd_null;
else {
const struct sftp_cmd_lookup *lookup;
lookup = lookup_command(cmd->words[0]);
if (!lookup)
cmd->obey = sftp_cmd_unknown;
else
cmd->obey = lookup->obey;
}
return cmd;
}
static void sftp_cmd_free(struct sftp_command *cmd)
{
if (cmd->words) {
for (size_t i = 0; i < cmd->nwords; i++)
sfree(cmd->words[i]);
sfree(cmd->words);
}
sfree(cmd);
}
static int do_sftp_init(void)
{
struct sftp_packet *pktin;
struct sftp_request *req;
/*
* Do protocol initialisation.
*/
if (!fxp_init()) {
fprintf(stderr,
"Fatal: unable to initialise SFTP: %s\n", fxp_error());
return 1; /* failure */
}
/*
* Find out where our home directory is.
*/
req = fxp_realpath_send(".");
pktin = sftp_wait_for_reply(req);
homedir = fxp_realpath_recv(pktin, req);
if (!homedir) {
fprintf(stderr,
"Warning: failed to resolve home directory: %s\n",
fxp_error());
homedir = dupstr(".");
} else {
with_stripctrl(san, homedir)
printf("Remote working directory is %s\n", san);
}
pwd = dupstr(homedir);
return 0;
}
static void do_sftp_cleanup(void)
{
char ch;
if (backend) {
backend_special(backend, SS_EOF, 0);
sent_eof = true;
sftp_recvdata(&ch, 1);
backend_free(backend);
sftp_cleanup_request();
backend = NULL;
}
if (pwd) {
sfree(pwd);
pwd = NULL;
}
if (homedir) {
sfree(homedir);
homedir = NULL;
}
}
int do_sftp(int mode, int modeflags, char *batchfile)
{
FILE *fp;
int ret;
/*
* Batch mode?
*/
if (mode == 0) {
/* ------------------------------------------------------------------
* Now we're ready to do Real Stuff.
*/
while (1) {
struct sftp_command *cmd;
cmd = sftp_getcmd(NULL, 0, 0);
if (!cmd)
break;
ret = cmd->obey(cmd);
sftp_cmd_free(cmd);
if (ret < 0)
break;
}
} else {
fp = fopen(batchfile, "r");
if (!fp) {
printf("Fatal: unable to open %s\n", batchfile);
return 1;
}
ret = 0;
while (1) {
struct sftp_command *cmd;
cmd = sftp_getcmd(fp, mode, modeflags);
if (!cmd)
break;
ret = cmd->obey(cmd);
sftp_cmd_free(cmd);
if (ret < 0)
break;
if (ret == 0) {
if (!(modeflags & 2))
break;
}
}
fclose(fp);
/*
* In batch mode, and if exit on command failure is enabled,
* any command failure causes the whole of PSFTP to fail.
*/
if (ret == 0 && !(modeflags & 2)) return 2;
}
return 0;
}
/* ----------------------------------------------------------------------
* Dirty bits: integration with PuTTY.
*/
static bool verbose = false;
void ldisc_echoedit_update(Ldisc *ldisc) { }
/*
* 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 psftp_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 psftp_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 psftp_eof(Seat *seat)
{
/*
* We expect to be the party deciding when to close the
* connection, so if we see EOF before we sent it ourselves, we
* should panic.
*/
if (!sent_eof) {
seat_connection_fatal(
psftp_seat, "Received unexpected end-of-file from SFTP server");
}
return false;
}
bool sftp_recvdata(char *buf, size_t len)
{
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;
}
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);
}
/*
* Short description of parameters.
*/
static void usage(void)
{
printf("PuTTY Secure File Transfer (SFTP) client\n");
printf("%s\n", ver);
printf("Usage: psftp [options] [user@]host\n");
printf("Options:\n");
printf(" -V print version information and exit\n");
printf(" -pgpfp print PGP key fingerprints and exit\n");
printf(" -b file use specified batchfile\n");
printf(" -bc output batchfile commands\n");
printf(" -be don't stop batchfile processing if errors\n");
printf(" -v show verbose messages\n");
printf(" -load sessname Load settings from saved session\n");
printf(" -l user connect with specified username\n");
printf(" -P port connect to specified port\n");
printf(" -pw passw login with specified password\n");
printf(" -1 -2 force use of particular SSH protocol version\n");
printf(" -4 -6 force use of IPv4 or IPv6\n");
printf(" -C enable compression\n");
printf(" -i key private key file for user authentication\n");
printf(" -noagent disable use of Pageant\n");
printf(" -agent enable use of Pageant\n");
printf(" -hostkey aa:bb:cc:...\n");
printf(" manually specify a host key (may be repeated)\n");
printf(" -batch disable all interactive prompts\n");
printf(" -no-sanitise-stderr don't strip control chars from"
" standard error\n");
printf(" -proxycmd command\n");
printf(" use 'command' as local proxy\n");
printf(" -sshlog file\n");
printf(" -sshrawlog file\n");
printf(" log protocol details to a file\n");
cleanup_exit(1);
}
static void version(void)
{
char *buildinfo_text = buildinfo("\n");
printf("psftp: %s\n%s\n", ver, buildinfo_text);
sfree(buildinfo_text);
exit(0);
}
/*
* Connect to a host.
*/
static int psftp_connect(char *userhost, char *user, int portnumber)
{
char *host, *realhost;
const char *err;
/* Separate host and username */
host = userhost;
host = strrchr(host, '@');
if (host == NULL) {
host = userhost;
} else {
*host++ = '\0';
if (user) {
printf("psftp: multiple usernames specified; using \"%s\"\n",
user);
} else
user = userhost;
}
/*
* 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);
}
/*
* If saved session / Default Settings says SSH-1 (`1 only' or `1'),
* then change it to SSH-2, on the grounds that that's more likely to
* work for SFTP. (Can be overridden with `-1' option.)
* But if it says `2 only' or `2', respect which.
*/
if ((conf_get_int(conf, CONF_sshprot) & ~1) != 2) /* is it 2 or 3? */
conf_set_int(conf, CONF_sshprot, 2);
/*
* 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);
}
if (portnumber)
conf_set_int(conf, CONF_port, portnumber);
/*
* 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 subsystem name. */
conf_set_str(conf, CONF_remote_cmd, "sftp");
conf_set_bool(conf, CONF_ssh_subsys, true);
conf_set_bool(conf, CONF_nopty, true);
/*
* Set up fallback option, for SSH-1 servers or servers with the
* sftp subsystem not enabled but the server binary installed
* in the usual place. We only support fallback on Unix
* systems, and we use a kludgy piece of shellery which should
* try to find sftp-server in various places (the obvious
* systemwide spots /usr/lib and /usr/local/lib, and then the
* user's PATH) and finally give up.
*
* test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server
* test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server
* exec sftp-server
*
* the idea being that this will attempt to use either of the
* obvious pathnames and then give up, and when it does give up
* it will print the preferred pathname in the error messages.
*/
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);
psftp_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)),
psftp_seat, &backend, psftp_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) {
fprintf(stderr, "ssh_init: %s\n", err);
return 1;
}
while (!backend_sendok(backend)) {
if (backend_exitcode(backend) >= 0)
return 1;
if (ssh_sftp_loop_iteration() < 0) {
fprintf(stderr, "ssh_init: error during SSH connection setup\n");
return 1;
}
}
if (verbose && realhost != NULL)
printf("Connected to %s\n", realhost);
if (realhost != NULL)
sfree(realhost);
return 0;
}
void cmdline_error(const char *p, ...)
{
va_list ap;
fprintf(stderr, "psftp: ");
va_start(ap, p);
vfprintf(stderr, p, ap);
va_end(ap);
fprintf(stderr, "\n try typing \"psftp -h\" for help\n");
exit(1);
}
const bool share_can_be_downstream = true;
const bool share_can_be_upstream = false;
static stdio_sink stderr_ss;
static StripCtrlChars *stderr_scc;
const unsigned cmdline_tooltype = TOOLTYPE_FILETRANSFER;
/*
* Main program. Parse arguments etc.
*/
int psftp_main(int argc, char *argv[])
{
int i, ret;
int portnumber = 0;
char *userhost, *user;
int mode = 0;
int modeflags = 0;
bool sanitise_stderr = true;
char *batchfile = NULL;
sk_init();
userhost = user = NULL;
/* Load Default Settings before doing anything else. */
conf = conf_new();
do_defaults(NULL, conf);
for (i = 1; i < argc; i++) {
int ret;
if (argv[i][0] != '-') {
if (userhost)
usage();
else
userhost = dupstr(argv[i]);
continue;
}
ret = cmdline_process_param(argv[i], i+1<argc?argv[i+1]:NULL, 1, conf);
if (ret == -2) {
cmdline_error("option \"%s\" requires an argument", argv[i]);
} else if (ret == 2) {
i++; /* skip next argument */
} else if (ret == 1) {
/* We have our own verbosity in addition to `flags'. */
if (cmdline_verbose())
verbose = true;
} else if (strcmp(argv[i], "-h") == 0 ||
strcmp(argv[i], "-?") == 0 ||
strcmp(argv[i], "--help") == 0) {
usage();
} else if (strcmp(argv[i], "-pgpfp") == 0) {
pgp_fingerprints();
return 1;
} else if (strcmp(argv[i], "-V") == 0 ||
strcmp(argv[i], "--version") == 0) {
version();
} else if (strcmp(argv[i], "-batch") == 0) {
console_batch_mode = true;
} else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) {
mode = 1;
batchfile = argv[++i];
} else if (strcmp(argv[i], "-bc") == 0) {
modeflags = modeflags | 1;
} else if (strcmp(argv[i], "-be") == 0) {
modeflags = modeflags | 2;
} else if (strcmp(argv[i], "-sanitise-stderr") == 0) {
sanitise_stderr = true;
} else if (strcmp(argv[i], "-no-sanitise-stderr") == 0) {
sanitise_stderr = false;
} else if (strcmp(argv[i], "--") == 0) {
i++;
break;
} else {
cmdline_error("unknown option \"%s\"", argv[i]);
}
}
argc -= i;
argv += i;
backend = NULL;
stdio_sink_init(&stderr_ss, stderr);
stderr_bs = BinarySink_UPCAST(&stderr_ss);
if (sanitise_stderr) {
stderr_scc = stripctrl_new(stderr_bs, false, L'\0');
stderr_bs = BinarySink_UPCAST(stderr_scc);
}
string_scc = stripctrl_new(NULL, false, L'\0');
/*
* If the loaded session provides a hostname, and a hostname has not
* otherwise been specified, pop it in `userhost' so that
* `psftp -load sessname' is sufficient to start a session.
*/
if (!userhost && conf_get_str(conf, CONF_host)[0] != '\0') {
userhost = dupstr(conf_get_str(conf, CONF_host));
}
/*
* If a user@host string has already been provided, connect to
* it now.
*/
if (userhost) {
int ret;
ret = psftp_connect(userhost, user, portnumber);
sfree(userhost);
if (ret)
return 1;
if (do_sftp_init())
return 1;
} else {
printf("psftp: no hostname specified; use \"open host.name\""
" to connect\n");
}
ret = do_sftp(mode, modeflags, batchfile);
if (backend && backend_connected(backend)) {
char ch;
backend_special(backend, SS_EOF, 0);
sent_eof = true;
sftp_recvdata(&ch, 1);
}
do_sftp_cleanup();
random_save_seed();
cmdline_cleanup();
sk_cleanup();
stripctrl_free(string_scc);
stripctrl_free(stderr_scc);
if (psftp_logctx)
log_free(psftp_logctx);
return ret;
}
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