| 1 | /* |
| 2 | * psftp.c: front end for PSFTP. |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <stdarg.h> |
| 8 | #include <assert.h> |
| 9 | #include <limits.h> |
| 10 | |
| 11 | #define PUTTY_DO_GLOBALS |
| 12 | #include "putty.h" |
| 13 | #include "psftp.h" |
| 14 | #include "storage.h" |
| 15 | #include "ssh.h" |
| 16 | #include "sftp.h" |
| 17 | #include "int64.h" |
| 18 | |
| 19 | /* |
| 20 | * Since SFTP is a request-response oriented protocol, it requires |
| 21 | * no buffer management: when we send data, we stop and wait for an |
| 22 | * acknowledgement _anyway_, and so we can't possibly overfill our |
| 23 | * send buffer. |
| 24 | */ |
| 25 | |
| 26 | static int psftp_connect(char *userhost, char *user, int portnumber); |
| 27 | static int do_sftp_init(void); |
| 28 | |
| 29 | /* ---------------------------------------------------------------------- |
| 30 | * sftp client state. |
| 31 | */ |
| 32 | |
| 33 | char *pwd, *homedir; |
| 34 | static Backend *back; |
| 35 | static void *backhandle; |
| 36 | static Config cfg; |
| 37 | |
| 38 | /* ---------------------------------------------------------------------- |
| 39 | * Higher-level helper functions used in commands. |
| 40 | */ |
| 41 | |
| 42 | /* |
| 43 | * Attempt to canonify a pathname starting from the pwd. If |
| 44 | * canonification fails, at least fall back to returning a _valid_ |
| 45 | * pathname (though it may be ugly, eg /home/simon/../foobar). |
| 46 | */ |
| 47 | char *canonify(char *name) |
| 48 | { |
| 49 | char *fullname, *canonname; |
| 50 | struct sftp_packet *pktin; |
| 51 | struct sftp_request *req, *rreq; |
| 52 | |
| 53 | if (name[0] == '/') { |
| 54 | fullname = dupstr(name); |
| 55 | } else { |
| 56 | char *slash; |
| 57 | if (pwd[strlen(pwd) - 1] == '/') |
| 58 | slash = ""; |
| 59 | else |
| 60 | slash = "/"; |
| 61 | fullname = dupcat(pwd, slash, name, NULL); |
| 62 | } |
| 63 | |
| 64 | sftp_register(req = fxp_realpath_send(fullname)); |
| 65 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 66 | assert(rreq == req); |
| 67 | canonname = fxp_realpath_recv(pktin, rreq); |
| 68 | |
| 69 | if (canonname) { |
| 70 | sfree(fullname); |
| 71 | return canonname; |
| 72 | } else { |
| 73 | /* |
| 74 | * Attempt number 2. Some FXP_REALPATH implementations |
| 75 | * (glibc-based ones, in particular) require the _whole_ |
| 76 | * path to point to something that exists, whereas others |
| 77 | * (BSD-based) only require all but the last component to |
| 78 | * exist. So if the first call failed, we should strip off |
| 79 | * everything from the last slash onwards and try again, |
| 80 | * then put the final component back on. |
| 81 | * |
| 82 | * Special cases: |
| 83 | * |
| 84 | * - if the last component is "/." or "/..", then we don't |
| 85 | * bother trying this because there's no way it can work. |
| 86 | * |
| 87 | * - if the thing actually ends with a "/", we remove it |
| 88 | * before we start. Except if the string is "/" itself |
| 89 | * (although I can't see why we'd have got here if so, |
| 90 | * because surely "/" would have worked the first |
| 91 | * time?), in which case we don't bother. |
| 92 | * |
| 93 | * - if there's no slash in the string at all, give up in |
| 94 | * confusion (we expect at least one because of the way |
| 95 | * we constructed the string). |
| 96 | */ |
| 97 | |
| 98 | int i; |
| 99 | char *returnname; |
| 100 | |
| 101 | i = strlen(fullname); |
| 102 | if (i > 2 && fullname[i - 1] == '/') |
| 103 | fullname[--i] = '\0'; /* strip trailing / unless at pos 0 */ |
| 104 | while (i > 0 && fullname[--i] != '/'); |
| 105 | |
| 106 | /* |
| 107 | * Give up on special cases. |
| 108 | */ |
| 109 | if (fullname[i] != '/' || /* no slash at all */ |
| 110 | !strcmp(fullname + i, "/.") || /* ends in /. */ |
| 111 | !strcmp(fullname + i, "/..") || /* ends in /.. */ |
| 112 | !strcmp(fullname, "/")) { |
| 113 | return fullname; |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | * Now i points at the slash. Deal with the final special |
| 118 | * case i==0 (ie the whole path was "/nonexistentfile"). |
| 119 | */ |
| 120 | fullname[i] = '\0'; /* separate the string */ |
| 121 | if (i == 0) { |
| 122 | sftp_register(req = fxp_realpath_send("/")); |
| 123 | } else { |
| 124 | sftp_register(req = fxp_realpath_send(fullname)); |
| 125 | } |
| 126 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 127 | assert(rreq == req); |
| 128 | canonname = fxp_realpath_recv(pktin, rreq); |
| 129 | |
| 130 | if (!canonname) |
| 131 | return fullname; /* even that failed; give up */ |
| 132 | |
| 133 | /* |
| 134 | * We have a canonical name for all but the last path |
| 135 | * component. Concatenate the last component and return. |
| 136 | */ |
| 137 | returnname = dupcat(canonname, |
| 138 | canonname[strlen(canonname) - 1] == |
| 139 | '/' ? "" : "/", fullname + i + 1, NULL); |
| 140 | sfree(fullname); |
| 141 | sfree(canonname); |
| 142 | return returnname; |
| 143 | } |
| 144 | } |
| 145 | |
| 146 | /* |
| 147 | * Return a pointer to the portion of str that comes after the last |
| 148 | * slash (or backslash or colon, if `local' is TRUE). |
| 149 | */ |
| 150 | static char *stripslashes(char *str, int local) |
| 151 | { |
| 152 | char *p; |
| 153 | |
| 154 | if (local) { |
| 155 | p = strchr(str, ':'); |
| 156 | if (p) str = p+1; |
| 157 | } |
| 158 | |
| 159 | p = strrchr(str, '/'); |
| 160 | if (p) str = p+1; |
| 161 | |
| 162 | if (local) { |
| 163 | p = strrchr(str, '\\'); |
| 164 | if (p) str = p+1; |
| 165 | } |
| 166 | |
| 167 | return str; |
| 168 | } |
| 169 | |
| 170 | /* ---------------------------------------------------------------------- |
| 171 | * Actual sftp commands. |
| 172 | */ |
| 173 | struct sftp_command { |
| 174 | char **words; |
| 175 | int nwords, wordssize; |
| 176 | int (*obey) (struct sftp_command *); /* returns <0 to quit */ |
| 177 | }; |
| 178 | |
| 179 | int sftp_cmd_null(struct sftp_command *cmd) |
| 180 | { |
| 181 | return 1; /* success */ |
| 182 | } |
| 183 | |
| 184 | int sftp_cmd_unknown(struct sftp_command *cmd) |
| 185 | { |
| 186 | printf("psftp: unknown command \"%s\"\n", cmd->words[0]); |
| 187 | return 0; /* failure */ |
| 188 | } |
| 189 | |
| 190 | int sftp_cmd_quit(struct sftp_command *cmd) |
| 191 | { |
| 192 | return -1; |
| 193 | } |
| 194 | |
| 195 | /* |
| 196 | * List a directory. If no arguments are given, list pwd; otherwise |
| 197 | * list the directory given in words[1]. |
| 198 | */ |
| 199 | static int sftp_ls_compare(const void *av, const void *bv) |
| 200 | { |
| 201 | const struct fxp_name *const *a = (const struct fxp_name *const *) av; |
| 202 | const struct fxp_name *const *b = (const struct fxp_name *const *) bv; |
| 203 | return strcmp((*a)->filename, (*b)->filename); |
| 204 | } |
| 205 | int sftp_cmd_ls(struct sftp_command *cmd) |
| 206 | { |
| 207 | struct fxp_handle *dirh; |
| 208 | struct fxp_names *names; |
| 209 | struct fxp_name **ournames; |
| 210 | int nnames, namesize; |
| 211 | char *dir, *cdir; |
| 212 | struct sftp_packet *pktin; |
| 213 | struct sftp_request *req, *rreq; |
| 214 | int i; |
| 215 | |
| 216 | if (back == NULL) { |
| 217 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 218 | return 0; |
| 219 | } |
| 220 | |
| 221 | if (cmd->nwords < 2) |
| 222 | dir = "."; |
| 223 | else |
| 224 | dir = cmd->words[1]; |
| 225 | |
| 226 | cdir = canonify(dir); |
| 227 | if (!cdir) { |
| 228 | printf("%s: %s\n", dir, fxp_error()); |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | printf("Listing directory %s\n", cdir); |
| 233 | |
| 234 | sftp_register(req = fxp_opendir_send(cdir)); |
| 235 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 236 | assert(rreq == req); |
| 237 | dirh = fxp_opendir_recv(pktin, rreq); |
| 238 | |
| 239 | if (dirh == NULL) { |
| 240 | printf("Unable to open %s: %s\n", dir, fxp_error()); |
| 241 | } else { |
| 242 | nnames = namesize = 0; |
| 243 | ournames = NULL; |
| 244 | |
| 245 | while (1) { |
| 246 | |
| 247 | sftp_register(req = fxp_readdir_send(dirh)); |
| 248 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 249 | assert(rreq == req); |
| 250 | names = fxp_readdir_recv(pktin, rreq); |
| 251 | |
| 252 | if (names == NULL) { |
| 253 | if (fxp_error_type() == SSH_FX_EOF) |
| 254 | break; |
| 255 | printf("Reading directory %s: %s\n", dir, fxp_error()); |
| 256 | break; |
| 257 | } |
| 258 | if (names->nnames == 0) { |
| 259 | fxp_free_names(names); |
| 260 | break; |
| 261 | } |
| 262 | |
| 263 | if (nnames + names->nnames >= namesize) { |
| 264 | namesize += names->nnames + 128; |
| 265 | ournames = sresize(ournames, namesize, struct fxp_name *); |
| 266 | } |
| 267 | |
| 268 | for (i = 0; i < names->nnames; i++) |
| 269 | ournames[nnames++] = fxp_dup_name(&names->names[i]); |
| 270 | |
| 271 | fxp_free_names(names); |
| 272 | } |
| 273 | sftp_register(req = fxp_close_send(dirh)); |
| 274 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 275 | assert(rreq == req); |
| 276 | fxp_close_recv(pktin, rreq); |
| 277 | |
| 278 | /* |
| 279 | * Now we have our filenames. Sort them by actual file |
| 280 | * name, and then output the longname parts. |
| 281 | */ |
| 282 | qsort(ournames, nnames, sizeof(*ournames), sftp_ls_compare); |
| 283 | |
| 284 | /* |
| 285 | * And print them. |
| 286 | */ |
| 287 | for (i = 0; i < nnames; i++) { |
| 288 | printf("%s\n", ournames[i]->longname); |
| 289 | fxp_free_name(ournames[i]); |
| 290 | } |
| 291 | sfree(ournames); |
| 292 | } |
| 293 | |
| 294 | sfree(cdir); |
| 295 | |
| 296 | return 1; |
| 297 | } |
| 298 | |
| 299 | /* |
| 300 | * Change directories. We do this by canonifying the new name, then |
| 301 | * trying to OPENDIR it. Only if that succeeds do we set the new pwd. |
| 302 | */ |
| 303 | int sftp_cmd_cd(struct sftp_command *cmd) |
| 304 | { |
| 305 | struct fxp_handle *dirh; |
| 306 | struct sftp_packet *pktin; |
| 307 | struct sftp_request *req, *rreq; |
| 308 | char *dir; |
| 309 | |
| 310 | if (back == NULL) { |
| 311 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 312 | return 0; |
| 313 | } |
| 314 | |
| 315 | if (cmd->nwords < 2) |
| 316 | dir = dupstr(homedir); |
| 317 | else |
| 318 | dir = canonify(cmd->words[1]); |
| 319 | |
| 320 | if (!dir) { |
| 321 | printf("%s: %s\n", dir, fxp_error()); |
| 322 | return 0; |
| 323 | } |
| 324 | |
| 325 | sftp_register(req = fxp_opendir_send(dir)); |
| 326 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 327 | assert(rreq == req); |
| 328 | dirh = fxp_opendir_recv(pktin, rreq); |
| 329 | |
| 330 | if (!dirh) { |
| 331 | printf("Directory %s: %s\n", dir, fxp_error()); |
| 332 | sfree(dir); |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | sftp_register(req = fxp_close_send(dirh)); |
| 337 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 338 | assert(rreq == req); |
| 339 | fxp_close_recv(pktin, rreq); |
| 340 | |
| 341 | sfree(pwd); |
| 342 | pwd = dir; |
| 343 | printf("Remote directory is now %s\n", pwd); |
| 344 | |
| 345 | return 1; |
| 346 | } |
| 347 | |
| 348 | /* |
| 349 | * Print current directory. Easy as pie. |
| 350 | */ |
| 351 | int sftp_cmd_pwd(struct sftp_command *cmd) |
| 352 | { |
| 353 | if (back == NULL) { |
| 354 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | printf("Remote directory is %s\n", pwd); |
| 359 | return 1; |
| 360 | } |
| 361 | |
| 362 | /* |
| 363 | * Get a file and save it at the local end. We have two very |
| 364 | * similar commands here: `get' and `reget', which differ in that |
| 365 | * `reget' checks for the existence of the destination file and |
| 366 | * starts from where a previous aborted transfer left off. |
| 367 | */ |
| 368 | int sftp_general_get(struct sftp_command *cmd, int restart) |
| 369 | { |
| 370 | struct fxp_handle *fh; |
| 371 | struct sftp_packet *pktin; |
| 372 | struct sftp_request *req, *rreq; |
| 373 | char *fname, *outfname; |
| 374 | uint64 offset; |
| 375 | FILE *fp; |
| 376 | int ret; |
| 377 | |
| 378 | if (back == NULL) { |
| 379 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | if (cmd->nwords < 2) { |
| 384 | printf("get: expects a filename\n"); |
| 385 | return 0; |
| 386 | } |
| 387 | |
| 388 | fname = canonify(cmd->words[1]); |
| 389 | if (!fname) { |
| 390 | printf("%s: %s\n", cmd->words[1], fxp_error()); |
| 391 | return 0; |
| 392 | } |
| 393 | outfname = (cmd->nwords == 2 ? |
| 394 | stripslashes(cmd->words[1], 0) : cmd->words[2]); |
| 395 | |
| 396 | sftp_register(req = fxp_open_send(fname, SSH_FXF_READ)); |
| 397 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 398 | assert(rreq == req); |
| 399 | fh = fxp_open_recv(pktin, rreq); |
| 400 | |
| 401 | if (!fh) { |
| 402 | printf("%s: %s\n", fname, fxp_error()); |
| 403 | sfree(fname); |
| 404 | return 0; |
| 405 | } |
| 406 | |
| 407 | if (restart) { |
| 408 | fp = fopen(outfname, "rb+"); |
| 409 | } else { |
| 410 | fp = fopen(outfname, "wb"); |
| 411 | } |
| 412 | |
| 413 | if (!fp) { |
| 414 | printf("local: unable to open %s\n", outfname); |
| 415 | |
| 416 | sftp_register(req = fxp_close_send(fh)); |
| 417 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 418 | assert(rreq == req); |
| 419 | fxp_close_recv(pktin, rreq); |
| 420 | |
| 421 | sfree(fname); |
| 422 | return 0; |
| 423 | } |
| 424 | |
| 425 | if (restart) { |
| 426 | long posn; |
| 427 | fseek(fp, 0L, SEEK_END); |
| 428 | posn = ftell(fp); |
| 429 | printf("reget: restarting at file position %ld\n", posn); |
| 430 | offset = uint64_make(0, posn); |
| 431 | } else { |
| 432 | offset = uint64_make(0, 0); |
| 433 | } |
| 434 | |
| 435 | printf("remote:%s => local:%s\n", fname, outfname); |
| 436 | |
| 437 | /* |
| 438 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
| 439 | * thus put up a progress bar. |
| 440 | */ |
| 441 | ret = 1; |
| 442 | while (1) { |
| 443 | char buffer[4096]; |
| 444 | int len; |
| 445 | int wpos, wlen; |
| 446 | |
| 447 | sftp_register(req = fxp_read_send(fh, offset, sizeof(buffer))); |
| 448 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 449 | assert(rreq == req); |
| 450 | len = fxp_read_recv(pktin, rreq, buffer, sizeof(buffer)); |
| 451 | |
| 452 | if ((len == -1 && fxp_error_type() == SSH_FX_EOF) || len == 0) |
| 453 | break; |
| 454 | if (len == -1) { |
| 455 | printf("error while reading: %s\n", fxp_error()); |
| 456 | ret = 0; |
| 457 | break; |
| 458 | } |
| 459 | |
| 460 | wpos = 0; |
| 461 | while (wpos < len) { |
| 462 | wlen = fwrite(buffer, 1, len - wpos, fp); |
| 463 | if (wlen <= 0) { |
| 464 | printf("error while writing local file\n"); |
| 465 | ret = 0; |
| 466 | break; |
| 467 | } |
| 468 | wpos += wlen; |
| 469 | } |
| 470 | if (wpos < len) { /* we had an error */ |
| 471 | ret = 0; |
| 472 | break; |
| 473 | } |
| 474 | offset = uint64_add32(offset, len); |
| 475 | } |
| 476 | |
| 477 | fclose(fp); |
| 478 | |
| 479 | sftp_register(req = fxp_close_send(fh)); |
| 480 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 481 | assert(rreq == req); |
| 482 | fxp_close_recv(pktin, rreq); |
| 483 | |
| 484 | sfree(fname); |
| 485 | |
| 486 | return ret; |
| 487 | } |
| 488 | int sftp_cmd_get(struct sftp_command *cmd) |
| 489 | { |
| 490 | return sftp_general_get(cmd, 0); |
| 491 | } |
| 492 | int sftp_cmd_reget(struct sftp_command *cmd) |
| 493 | { |
| 494 | return sftp_general_get(cmd, 1); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * Send a file and store it at the remote end. We have two very |
| 499 | * similar commands here: `put' and `reput', which differ in that |
| 500 | * `reput' checks for the existence of the destination file and |
| 501 | * starts from where a previous aborted transfer left off. |
| 502 | */ |
| 503 | int sftp_general_put(struct sftp_command *cmd, int restart) |
| 504 | { |
| 505 | struct fxp_handle *fh; |
| 506 | char *fname, *origoutfname, *outfname; |
| 507 | struct sftp_packet *pktin; |
| 508 | struct sftp_request *req, *rreq; |
| 509 | uint64 offset; |
| 510 | FILE *fp; |
| 511 | int ret; |
| 512 | |
| 513 | if (back == NULL) { |
| 514 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 515 | return 0; |
| 516 | } |
| 517 | |
| 518 | if (cmd->nwords < 2) { |
| 519 | printf("put: expects a filename\n"); |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | fname = cmd->words[1]; |
| 524 | origoutfname = (cmd->nwords == 2 ? |
| 525 | stripslashes(cmd->words[1], 1) : cmd->words[2]); |
| 526 | outfname = canonify(origoutfname); |
| 527 | if (!outfname) { |
| 528 | printf("%s: %s\n", origoutfname, fxp_error()); |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | fp = fopen(fname, "rb"); |
| 533 | if (!fp) { |
| 534 | printf("local: unable to open %s\n", fname); |
| 535 | sfree(outfname); |
| 536 | return 0; |
| 537 | } |
| 538 | if (restart) { |
| 539 | sftp_register(req = fxp_open_send(outfname, SSH_FXF_WRITE)); |
| 540 | } else { |
| 541 | sftp_register(req = fxp_open_send(outfname, SSH_FXF_WRITE | |
| 542 | SSH_FXF_CREAT | SSH_FXF_TRUNC)); |
| 543 | } |
| 544 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 545 | assert(rreq == req); |
| 546 | fh = fxp_open_recv(pktin, rreq); |
| 547 | |
| 548 | if (!fh) { |
| 549 | printf("%s: %s\n", outfname, fxp_error()); |
| 550 | sfree(outfname); |
| 551 | return 0; |
| 552 | } |
| 553 | |
| 554 | if (restart) { |
| 555 | char decbuf[30]; |
| 556 | struct fxp_attrs attrs; |
| 557 | int ret; |
| 558 | |
| 559 | sftp_register(req = fxp_fstat_send(fh)); |
| 560 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 561 | assert(rreq == req); |
| 562 | ret = fxp_fstat_recv(pktin, rreq, &attrs); |
| 563 | |
| 564 | if (!ret) { |
| 565 | printf("read size of %s: %s\n", outfname, fxp_error()); |
| 566 | sfree(outfname); |
| 567 | return 0; |
| 568 | } |
| 569 | if (!(attrs.flags & SSH_FILEXFER_ATTR_SIZE)) { |
| 570 | printf("read size of %s: size was not given\n", outfname); |
| 571 | sfree(outfname); |
| 572 | return 0; |
| 573 | } |
| 574 | offset = attrs.size; |
| 575 | uint64_decimal(offset, decbuf); |
| 576 | printf("reput: restarting at file position %s\n", decbuf); |
| 577 | if (uint64_compare(offset, uint64_make(0, LONG_MAX)) > 0) { |
| 578 | printf("reput: remote file is larger than we can deal with\n"); |
| 579 | sfree(outfname); |
| 580 | return 0; |
| 581 | } |
| 582 | if (fseek(fp, offset.lo, SEEK_SET) != 0) |
| 583 | fseek(fp, 0, SEEK_END); /* *shrug* */ |
| 584 | } else { |
| 585 | offset = uint64_make(0, 0); |
| 586 | } |
| 587 | |
| 588 | printf("local:%s => remote:%s\n", fname, outfname); |
| 589 | |
| 590 | /* |
| 591 | * FIXME: we can use FXP_FSTAT here to get the file size, and |
| 592 | * thus put up a progress bar. |
| 593 | */ |
| 594 | ret = 1; |
| 595 | while (1) { |
| 596 | char buffer[4096]; |
| 597 | int len, ret; |
| 598 | |
| 599 | len = fread(buffer, 1, sizeof(buffer), fp); |
| 600 | if (len == -1) { |
| 601 | printf("error while reading local file\n"); |
| 602 | ret = 0; |
| 603 | break; |
| 604 | } else if (len == 0) { |
| 605 | break; |
| 606 | } |
| 607 | |
| 608 | sftp_register(req = fxp_write_send(fh, buffer, offset, len)); |
| 609 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 610 | assert(rreq == req); |
| 611 | ret = fxp_write_recv(pktin, rreq); |
| 612 | |
| 613 | if (!ret) { |
| 614 | printf("error while writing: %s\n", fxp_error()); |
| 615 | ret = 0; |
| 616 | break; |
| 617 | } |
| 618 | offset = uint64_add32(offset, len); |
| 619 | } |
| 620 | |
| 621 | sftp_register(req = fxp_close_send(fh)); |
| 622 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 623 | assert(rreq == req); |
| 624 | fxp_close_recv(pktin, rreq); |
| 625 | |
| 626 | fclose(fp); |
| 627 | sfree(outfname); |
| 628 | |
| 629 | return ret; |
| 630 | } |
| 631 | int sftp_cmd_put(struct sftp_command *cmd) |
| 632 | { |
| 633 | return sftp_general_put(cmd, 0); |
| 634 | } |
| 635 | int sftp_cmd_reput(struct sftp_command *cmd) |
| 636 | { |
| 637 | return sftp_general_put(cmd, 1); |
| 638 | } |
| 639 | |
| 640 | int sftp_cmd_mkdir(struct sftp_command *cmd) |
| 641 | { |
| 642 | char *dir; |
| 643 | struct sftp_packet *pktin; |
| 644 | struct sftp_request *req, *rreq; |
| 645 | int result; |
| 646 | |
| 647 | if (back == NULL) { |
| 648 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 649 | return 0; |
| 650 | } |
| 651 | |
| 652 | if (cmd->nwords < 2) { |
| 653 | printf("mkdir: expects a directory\n"); |
| 654 | return 0; |
| 655 | } |
| 656 | |
| 657 | dir = canonify(cmd->words[1]); |
| 658 | if (!dir) { |
| 659 | printf("%s: %s\n", dir, fxp_error()); |
| 660 | return 0; |
| 661 | } |
| 662 | |
| 663 | sftp_register(req = fxp_mkdir_send(dir)); |
| 664 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 665 | assert(rreq == req); |
| 666 | result = fxp_mkdir_recv(pktin, rreq); |
| 667 | |
| 668 | if (!result) { |
| 669 | printf("mkdir %s: %s\n", dir, fxp_error()); |
| 670 | sfree(dir); |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | sfree(dir); |
| 675 | return 1; |
| 676 | } |
| 677 | |
| 678 | int sftp_cmd_rmdir(struct sftp_command *cmd) |
| 679 | { |
| 680 | char *dir; |
| 681 | struct sftp_packet *pktin; |
| 682 | struct sftp_request *req, *rreq; |
| 683 | int result; |
| 684 | |
| 685 | if (back == NULL) { |
| 686 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 687 | return 0; |
| 688 | } |
| 689 | |
| 690 | if (cmd->nwords < 2) { |
| 691 | printf("rmdir: expects a directory\n"); |
| 692 | return 0; |
| 693 | } |
| 694 | |
| 695 | dir = canonify(cmd->words[1]); |
| 696 | if (!dir) { |
| 697 | printf("%s: %s\n", dir, fxp_error()); |
| 698 | return 0; |
| 699 | } |
| 700 | |
| 701 | sftp_register(req = fxp_rmdir_send(dir)); |
| 702 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 703 | assert(rreq == req); |
| 704 | result = fxp_rmdir_recv(pktin, rreq); |
| 705 | |
| 706 | if (!result) { |
| 707 | printf("rmdir %s: %s\n", dir, fxp_error()); |
| 708 | sfree(dir); |
| 709 | return 0; |
| 710 | } |
| 711 | |
| 712 | sfree(dir); |
| 713 | return 1; |
| 714 | } |
| 715 | |
| 716 | int sftp_cmd_rm(struct sftp_command *cmd) |
| 717 | { |
| 718 | char *fname; |
| 719 | struct sftp_packet *pktin; |
| 720 | struct sftp_request *req, *rreq; |
| 721 | int result; |
| 722 | |
| 723 | if (back == NULL) { |
| 724 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 725 | return 0; |
| 726 | } |
| 727 | |
| 728 | if (cmd->nwords < 2) { |
| 729 | printf("rm: expects a filename\n"); |
| 730 | return 0; |
| 731 | } |
| 732 | |
| 733 | fname = canonify(cmd->words[1]); |
| 734 | if (!fname) { |
| 735 | printf("%s: %s\n", fname, fxp_error()); |
| 736 | return 0; |
| 737 | } |
| 738 | |
| 739 | sftp_register(req = fxp_remove_send(fname)); |
| 740 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 741 | assert(rreq == req); |
| 742 | result = fxp_remove_recv(pktin, rreq); |
| 743 | |
| 744 | if (!result) { |
| 745 | printf("rm %s: %s\n", fname, fxp_error()); |
| 746 | sfree(fname); |
| 747 | return 0; |
| 748 | } |
| 749 | |
| 750 | sfree(fname); |
| 751 | return 1; |
| 752 | } |
| 753 | |
| 754 | int sftp_cmd_mv(struct sftp_command *cmd) |
| 755 | { |
| 756 | char *srcfname, *dstfname; |
| 757 | struct sftp_packet *pktin; |
| 758 | struct sftp_request *req, *rreq; |
| 759 | int result; |
| 760 | |
| 761 | if (back == NULL) { |
| 762 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 763 | return 0; |
| 764 | } |
| 765 | |
| 766 | if (cmd->nwords < 3) { |
| 767 | printf("mv: expects two filenames\n"); |
| 768 | return 0; |
| 769 | } |
| 770 | srcfname = canonify(cmd->words[1]); |
| 771 | if (!srcfname) { |
| 772 | printf("%s: %s\n", srcfname, fxp_error()); |
| 773 | return 0; |
| 774 | } |
| 775 | |
| 776 | dstfname = canonify(cmd->words[2]); |
| 777 | if (!dstfname) { |
| 778 | printf("%s: %s\n", dstfname, fxp_error()); |
| 779 | return 0; |
| 780 | } |
| 781 | |
| 782 | sftp_register(req = fxp_rename_send(srcfname, dstfname)); |
| 783 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 784 | assert(rreq == req); |
| 785 | result = fxp_rename_recv(pktin, rreq); |
| 786 | |
| 787 | if (!result) { |
| 788 | char const *error = fxp_error(); |
| 789 | struct fxp_attrs attrs; |
| 790 | |
| 791 | /* |
| 792 | * The move might have failed because dstfname pointed at a |
| 793 | * directory. We check this possibility now: if dstfname |
| 794 | * _is_ a directory, we re-attempt the move by appending |
| 795 | * the basename of srcfname to dstfname. |
| 796 | */ |
| 797 | sftp_register(req = fxp_stat_send(dstfname)); |
| 798 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 799 | assert(rreq == req); |
| 800 | result = fxp_stat_recv(pktin, rreq, &attrs); |
| 801 | |
| 802 | if (result && |
| 803 | (attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS) && |
| 804 | (attrs.permissions & 0040000)) { |
| 805 | char *p; |
| 806 | char *newname, *newcanon; |
| 807 | printf("(destination %s is a directory)\n", dstfname); |
| 808 | p = srcfname + strlen(srcfname); |
| 809 | while (p > srcfname && p[-1] != '/') p--; |
| 810 | newname = dupcat(dstfname, "/", p, NULL); |
| 811 | newcanon = canonify(newname); |
| 812 | sfree(newname); |
| 813 | if (newcanon) { |
| 814 | sfree(dstfname); |
| 815 | dstfname = newcanon; |
| 816 | |
| 817 | sftp_register(req = fxp_rename_send(srcfname, dstfname)); |
| 818 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 819 | assert(rreq == req); |
| 820 | result = fxp_rename_recv(pktin, rreq); |
| 821 | |
| 822 | error = result ? NULL : fxp_error(); |
| 823 | } |
| 824 | } |
| 825 | if (error) { |
| 826 | printf("mv %s %s: %s\n", srcfname, dstfname, error); |
| 827 | sfree(srcfname); |
| 828 | sfree(dstfname); |
| 829 | return 0; |
| 830 | } |
| 831 | } |
| 832 | printf("%s -> %s\n", srcfname, dstfname); |
| 833 | |
| 834 | sfree(srcfname); |
| 835 | sfree(dstfname); |
| 836 | return 1; |
| 837 | } |
| 838 | |
| 839 | int sftp_cmd_chmod(struct sftp_command *cmd) |
| 840 | { |
| 841 | char *fname, *mode; |
| 842 | int result; |
| 843 | struct fxp_attrs attrs; |
| 844 | unsigned attrs_clr, attrs_xor, oldperms, newperms; |
| 845 | struct sftp_packet *pktin; |
| 846 | struct sftp_request *req, *rreq; |
| 847 | |
| 848 | if (back == NULL) { |
| 849 | printf("psftp: not connected to a host; use \"open host.name\"\n"); |
| 850 | return 0; |
| 851 | } |
| 852 | |
| 853 | if (cmd->nwords < 3) { |
| 854 | printf("chmod: expects a mode specifier and a filename\n"); |
| 855 | return 0; |
| 856 | } |
| 857 | |
| 858 | /* |
| 859 | * Attempt to parse the mode specifier in cmd->words[1]. We |
| 860 | * don't support the full horror of Unix chmod; instead we |
| 861 | * support a much simpler syntax in which the user can either |
| 862 | * specify an octal number, or a comma-separated sequence of |
| 863 | * [ugoa]*[-+=][rwxst]+. (The initial [ugoa] sequence may |
| 864 | * _only_ be omitted if the only attribute mentioned is t, |
| 865 | * since all others require a user/group/other specification. |
| 866 | * Additionally, the s attribute may not be specified for any |
| 867 | * [ugoa] specifications other than exactly u or exactly g. |
| 868 | */ |
| 869 | attrs_clr = attrs_xor = 0; |
| 870 | mode = cmd->words[1]; |
| 871 | if (mode[0] >= '0' && mode[0] <= '9') { |
| 872 | if (mode[strspn(mode, "01234567")]) { |
| 873 | printf("chmod: numeric file modes should" |
| 874 | " contain digits 0-7 only\n"); |
| 875 | return 0; |
| 876 | } |
| 877 | attrs_clr = 07777; |
| 878 | sscanf(mode, "%o", &attrs_xor); |
| 879 | attrs_xor &= attrs_clr; |
| 880 | } else { |
| 881 | while (*mode) { |
| 882 | char *modebegin = mode; |
| 883 | unsigned subset, perms; |
| 884 | int action; |
| 885 | |
| 886 | subset = 0; |
| 887 | while (*mode && *mode != ',' && |
| 888 | *mode != '+' && *mode != '-' && *mode != '=') { |
| 889 | switch (*mode) { |
| 890 | case 'u': subset |= 04700; break; /* setuid, user perms */ |
| 891 | case 'g': subset |= 02070; break; /* setgid, group perms */ |
| 892 | case 'o': subset |= 00007; break; /* just other perms */ |
| 893 | case 'a': subset |= 06777; break; /* all of the above */ |
| 894 | default: |
| 895 | printf("chmod: file mode '%.*s' contains unrecognised" |
| 896 | " user/group/other specifier '%c'\n", |
| 897 | (int)strcspn(modebegin, ","), modebegin, *mode); |
| 898 | return 0; |
| 899 | } |
| 900 | mode++; |
| 901 | } |
| 902 | if (!*mode || *mode == ',') { |
| 903 | printf("chmod: file mode '%.*s' is incomplete\n", |
| 904 | (int)strcspn(modebegin, ","), modebegin); |
| 905 | return 0; |
| 906 | } |
| 907 | action = *mode++; |
| 908 | if (!*mode || *mode == ',') { |
| 909 | printf("chmod: file mode '%.*s' is incomplete\n", |
| 910 | (int)strcspn(modebegin, ","), modebegin); |
| 911 | return 0; |
| 912 | } |
| 913 | perms = 0; |
| 914 | while (*mode && *mode != ',') { |
| 915 | switch (*mode) { |
| 916 | case 'r': perms |= 00444; break; |
| 917 | case 'w': perms |= 00222; break; |
| 918 | case 'x': perms |= 00111; break; |
| 919 | case 't': perms |= 01000; subset |= 01000; break; |
| 920 | case 's': |
| 921 | if ((subset & 06777) != 04700 && |
| 922 | (subset & 06777) != 02070) { |
| 923 | printf("chmod: file mode '%.*s': set[ug]id bit should" |
| 924 | " be used with exactly one of u or g only\n", |
| 925 | (int)strcspn(modebegin, ","), modebegin); |
| 926 | return 0; |
| 927 | } |
| 928 | perms |= 06000; |
| 929 | break; |
| 930 | default: |
| 931 | printf("chmod: file mode '%.*s' contains unrecognised" |
| 932 | " permission specifier '%c'\n", |
| 933 | (int)strcspn(modebegin, ","), modebegin, *mode); |
| 934 | return 0; |
| 935 | } |
| 936 | mode++; |
| 937 | } |
| 938 | if (!(subset & 06777) && (perms &~ subset)) { |
| 939 | printf("chmod: file mode '%.*s' contains no user/group/other" |
| 940 | " specifier and permissions other than 't' \n", |
| 941 | (int)strcspn(modebegin, ","), modebegin); |
| 942 | return 0; |
| 943 | } |
| 944 | perms &= subset; |
| 945 | switch (action) { |
| 946 | case '+': |
| 947 | attrs_clr |= perms; |
| 948 | attrs_xor |= perms; |
| 949 | break; |
| 950 | case '-': |
| 951 | attrs_clr |= perms; |
| 952 | attrs_xor &= ~perms; |
| 953 | break; |
| 954 | case '=': |
| 955 | attrs_clr |= subset; |
| 956 | attrs_xor |= perms; |
| 957 | break; |
| 958 | } |
| 959 | if (*mode) mode++; /* eat comma */ |
| 960 | } |
| 961 | } |
| 962 | |
| 963 | fname = canonify(cmd->words[2]); |
| 964 | if (!fname) { |
| 965 | printf("%s: %s\n", fname, fxp_error()); |
| 966 | return 0; |
| 967 | } |
| 968 | |
| 969 | sftp_register(req = fxp_stat_send(fname)); |
| 970 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 971 | assert(rreq == req); |
| 972 | result = fxp_stat_recv(pktin, rreq, &attrs); |
| 973 | |
| 974 | if (!result || !(attrs.flags & SSH_FILEXFER_ATTR_PERMISSIONS)) { |
| 975 | printf("get attrs for %s: %s\n", fname, |
| 976 | result ? "file permissions not provided" : fxp_error()); |
| 977 | sfree(fname); |
| 978 | return 0; |
| 979 | } |
| 980 | |
| 981 | attrs.flags = SSH_FILEXFER_ATTR_PERMISSIONS; /* perms _only_ */ |
| 982 | oldperms = attrs.permissions & 07777; |
| 983 | attrs.permissions &= ~attrs_clr; |
| 984 | attrs.permissions ^= attrs_xor; |
| 985 | newperms = attrs.permissions & 07777; |
| 986 | |
| 987 | sftp_register(req = fxp_setstat_send(fname, attrs)); |
| 988 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 989 | assert(rreq == req); |
| 990 | result = fxp_setstat_recv(pktin, rreq); |
| 991 | |
| 992 | if (!result) { |
| 993 | printf("set attrs for %s: %s\n", fname, fxp_error()); |
| 994 | sfree(fname); |
| 995 | return 0; |
| 996 | } |
| 997 | |
| 998 | printf("%s: %04o -> %04o\n", fname, oldperms, newperms); |
| 999 | |
| 1000 | sfree(fname); |
| 1001 | return 1; |
| 1002 | } |
| 1003 | |
| 1004 | static int sftp_cmd_open(struct sftp_command *cmd) |
| 1005 | { |
| 1006 | if (back != NULL) { |
| 1007 | printf("psftp: already connected\n"); |
| 1008 | return 0; |
| 1009 | } |
| 1010 | |
| 1011 | if (cmd->nwords < 2) { |
| 1012 | printf("open: expects a host name\n"); |
| 1013 | return 0; |
| 1014 | } |
| 1015 | |
| 1016 | if (psftp_connect(cmd->words[1], NULL, 0)) { |
| 1017 | back = NULL; /* connection is already closed */ |
| 1018 | return -1; /* this is fatal */ |
| 1019 | } |
| 1020 | do_sftp_init(); |
| 1021 | return 1; |
| 1022 | } |
| 1023 | |
| 1024 | static int sftp_cmd_lcd(struct sftp_command *cmd) |
| 1025 | { |
| 1026 | char *currdir, *errmsg; |
| 1027 | |
| 1028 | if (cmd->nwords < 2) { |
| 1029 | printf("lcd: expects a local directory name\n"); |
| 1030 | return 0; |
| 1031 | } |
| 1032 | |
| 1033 | errmsg = psftp_lcd(cmd->words[1]); |
| 1034 | if (errmsg) { |
| 1035 | printf("lcd: unable to change directory: %s\n", errmsg); |
| 1036 | sfree(errmsg); |
| 1037 | return 0; |
| 1038 | } |
| 1039 | |
| 1040 | currdir = psftp_getcwd(); |
| 1041 | printf("New local directory is %s\n", currdir); |
| 1042 | sfree(currdir); |
| 1043 | |
| 1044 | return 1; |
| 1045 | } |
| 1046 | |
| 1047 | static int sftp_cmd_lpwd(struct sftp_command *cmd) |
| 1048 | { |
| 1049 | char *currdir; |
| 1050 | |
| 1051 | currdir = psftp_getcwd(); |
| 1052 | printf("Current local directory is %s\n", currdir); |
| 1053 | sfree(currdir); |
| 1054 | |
| 1055 | return 1; |
| 1056 | } |
| 1057 | |
| 1058 | static int sftp_cmd_pling(struct sftp_command *cmd) |
| 1059 | { |
| 1060 | int exitcode; |
| 1061 | |
| 1062 | exitcode = system(cmd->words[1]); |
| 1063 | return (exitcode == 0); |
| 1064 | } |
| 1065 | |
| 1066 | static int sftp_cmd_help(struct sftp_command *cmd); |
| 1067 | |
| 1068 | static struct sftp_cmd_lookup { |
| 1069 | char *name; |
| 1070 | /* |
| 1071 | * For help purposes, there are two kinds of command: |
| 1072 | * |
| 1073 | * - primary commands, in which `longhelp' is non-NULL. In |
| 1074 | * this case `shorthelp' is descriptive text, and `longhelp' |
| 1075 | * is longer descriptive text intended to be printed after |
| 1076 | * the command name. |
| 1077 | * |
| 1078 | * - alias commands, in which `longhelp' is NULL. In this case |
| 1079 | * `shorthelp' is the name of a primary command, which |
| 1080 | * contains the help that should double up for this command. |
| 1081 | */ |
| 1082 | int listed; /* do we list this in primary help? */ |
| 1083 | char *shorthelp; |
| 1084 | char *longhelp; |
| 1085 | int (*obey) (struct sftp_command *); |
| 1086 | } sftp_lookup[] = { |
| 1087 | /* |
| 1088 | * List of sftp commands. This is binary-searched so it MUST be |
| 1089 | * in ASCII order. |
| 1090 | */ |
| 1091 | { |
| 1092 | "!", TRUE, "run a local command", |
| 1093 | "<command>\n" |
| 1094 | /* FIXME: this example is crap for non-Windows. */ |
| 1095 | " Runs a local command. For example, \"!del myfile\".\n", |
| 1096 | sftp_cmd_pling |
| 1097 | }, |
| 1098 | { |
| 1099 | "bye", TRUE, "finish your SFTP session", |
| 1100 | "\n" |
| 1101 | " Terminates your SFTP session and quits the PSFTP program.\n", |
| 1102 | sftp_cmd_quit |
| 1103 | }, |
| 1104 | { |
| 1105 | "cd", TRUE, "change your remote working directory", |
| 1106 | " [ <New working directory> ]\n" |
| 1107 | " Change the remote working directory for your SFTP session.\n" |
| 1108 | " If a new working directory is not supplied, you will be\n" |
| 1109 | " returned to your home directory.\n", |
| 1110 | sftp_cmd_cd |
| 1111 | }, |
| 1112 | { |
| 1113 | "chmod", TRUE, "change file permissions and modes", |
| 1114 | " ( <octal-digits> | <modifiers> ) <filename>\n" |
| 1115 | " Change the file permissions on a file or directory.\n" |
| 1116 | " <octal-digits> can be any octal Unix permission specifier.\n" |
| 1117 | " Alternatively, <modifiers> can include:\n" |
| 1118 | " u+r make file readable by owning user\n" |
| 1119 | " u+w make file writable by owning user\n" |
| 1120 | " u+x make file executable by owning user\n" |
| 1121 | " u-r make file not readable by owning user\n" |
| 1122 | " [also u-w, u-x]\n" |
| 1123 | " g+r make file readable by members of owning group\n" |
| 1124 | " [also g+w, g+x, g-r, g-w, g-x]\n" |
| 1125 | " o+r make file readable by all other users\n" |
| 1126 | " [also o+w, o+x, o-r, o-w, o-x]\n" |
| 1127 | " a+r make file readable by absolutely everybody\n" |
| 1128 | " [also a+w, a+x, a-r, a-w, a-x]\n" |
| 1129 | " u+s enable the Unix set-user-ID bit\n" |
| 1130 | " u-s disable the Unix set-user-ID bit\n" |
| 1131 | " g+s enable the Unix set-group-ID bit\n" |
| 1132 | " g-s disable the Unix set-group-ID bit\n" |
| 1133 | " +t enable the Unix \"sticky bit\"\n" |
| 1134 | " You can give more than one modifier for the same user (\"g-rwx\"), and\n" |
| 1135 | " more than one user for the same modifier (\"ug+w\"). You can\n" |
| 1136 | " use commas to separate different modifiers (\"u+rwx,g+s\").\n", |
| 1137 | sftp_cmd_chmod |
| 1138 | }, |
| 1139 | { |
| 1140 | "del", TRUE, "delete a file", |
| 1141 | " <filename>\n" |
| 1142 | " Delete a file.\n", |
| 1143 | sftp_cmd_rm |
| 1144 | }, |
| 1145 | { |
| 1146 | "delete", FALSE, "del", NULL, sftp_cmd_rm |
| 1147 | }, |
| 1148 | { |
| 1149 | "dir", TRUE, "list contents of a remote directory", |
| 1150 | " [ <directory-name> ]\n" |
| 1151 | " List the contents of a specified directory on the server.\n" |
| 1152 | " If <directory-name> is not given, the current working directory\n" |
| 1153 | " will be listed.\n", |
| 1154 | sftp_cmd_ls |
| 1155 | }, |
| 1156 | { |
| 1157 | "exit", TRUE, "bye", NULL, sftp_cmd_quit |
| 1158 | }, |
| 1159 | { |
| 1160 | "get", TRUE, "download a file from the server to your local machine", |
| 1161 | " <filename> [ <local-filename> ]\n" |
| 1162 | " Downloads a file on the server and stores it locally under\n" |
| 1163 | " the same name, or under a different one if you supply the\n" |
| 1164 | " argument <local-filename>.\n", |
| 1165 | sftp_cmd_get |
| 1166 | }, |
| 1167 | { |
| 1168 | "help", TRUE, "give help", |
| 1169 | " [ <command> [ <command> ... ] ]\n" |
| 1170 | " Give general help if no commands are specified.\n" |
| 1171 | " If one or more commands are specified, give specific help on\n" |
| 1172 | " those particular commands.\n", |
| 1173 | sftp_cmd_help |
| 1174 | }, |
| 1175 | { |
| 1176 | "lcd", TRUE, "change local working directory", |
| 1177 | " <local-directory-name>\n" |
| 1178 | " Change the local working directory of the PSFTP program (the\n" |
| 1179 | " default location where the \"get\" command will save files).\n", |
| 1180 | sftp_cmd_lcd |
| 1181 | }, |
| 1182 | { |
| 1183 | "lpwd", TRUE, "print local working directory", |
| 1184 | "\n" |
| 1185 | " Print the local working directory of the PSFTP program (the\n" |
| 1186 | " default location where the \"get\" command will save files).\n", |
| 1187 | sftp_cmd_lpwd |
| 1188 | }, |
| 1189 | { |
| 1190 | "ls", TRUE, "dir", NULL, |
| 1191 | sftp_cmd_ls |
| 1192 | }, |
| 1193 | { |
| 1194 | "mkdir", TRUE, "create a directory on the remote server", |
| 1195 | " <directory-name>\n" |
| 1196 | " Creates a directory with the given name on the server.\n", |
| 1197 | sftp_cmd_mkdir |
| 1198 | }, |
| 1199 | { |
| 1200 | "mv", TRUE, "move or rename a file on the remote server", |
| 1201 | " <source-filename> <destination-filename>\n" |
| 1202 | " Moves or renames the file <source-filename> on the server,\n" |
| 1203 | " so that it is accessible under the name <destination-filename>.\n", |
| 1204 | sftp_cmd_mv |
| 1205 | }, |
| 1206 | { |
| 1207 | "open", TRUE, "connect to a host", |
| 1208 | " [<user>@]<hostname>\n" |
| 1209 | " Establishes an SFTP connection to a given host. Only usable\n" |
| 1210 | " when you did not already specify a host name on the command\n" |
| 1211 | " line.\n", |
| 1212 | sftp_cmd_open |
| 1213 | }, |
| 1214 | { |
| 1215 | "put", TRUE, "upload a file from your local machine to the server", |
| 1216 | " <filename> [ <remote-filename> ]\n" |
| 1217 | " Uploads a file to the server and stores it there under\n" |
| 1218 | " the same name, or under a different one if you supply the\n" |
| 1219 | " argument <remote-filename>.\n", |
| 1220 | sftp_cmd_put |
| 1221 | }, |
| 1222 | { |
| 1223 | "pwd", TRUE, "print your remote working directory", |
| 1224 | "\n" |
| 1225 | " Print the current remote working directory for your SFTP session.\n", |
| 1226 | sftp_cmd_pwd |
| 1227 | }, |
| 1228 | { |
| 1229 | "quit", TRUE, "bye", NULL, |
| 1230 | sftp_cmd_quit |
| 1231 | }, |
| 1232 | { |
| 1233 | "reget", TRUE, "continue downloading a file", |
| 1234 | " <filename> [ <local-filename> ]\n" |
| 1235 | " Works exactly like the \"get\" command, but the local file\n" |
| 1236 | " must already exist. The download will begin at the end of the\n" |
| 1237 | " file. This is for resuming a download that was interrupted.\n", |
| 1238 | sftp_cmd_reget |
| 1239 | }, |
| 1240 | { |
| 1241 | "ren", TRUE, "mv", NULL, |
| 1242 | sftp_cmd_mv |
| 1243 | }, |
| 1244 | { |
| 1245 | "rename", FALSE, "mv", NULL, |
| 1246 | sftp_cmd_mv |
| 1247 | }, |
| 1248 | { |
| 1249 | "reput", TRUE, "continue uploading a file", |
| 1250 | " <filename> [ <remote-filename> ]\n" |
| 1251 | " Works exactly like the \"put\" command, but the remote file\n" |
| 1252 | " must already exist. The upload will begin at the end of the\n" |
| 1253 | " file. This is for resuming an upload that was interrupted.\n", |
| 1254 | sftp_cmd_reput |
| 1255 | }, |
| 1256 | { |
| 1257 | "rm", TRUE, "del", NULL, |
| 1258 | sftp_cmd_rm |
| 1259 | }, |
| 1260 | { |
| 1261 | "rmdir", TRUE, "remove a directory on the remote server", |
| 1262 | " <directory-name>\n" |
| 1263 | " Removes the directory with the given name on the server.\n" |
| 1264 | " The directory will not be removed unless it is empty.\n", |
| 1265 | sftp_cmd_rmdir |
| 1266 | } |
| 1267 | }; |
| 1268 | |
| 1269 | const struct sftp_cmd_lookup *lookup_command(char *name) |
| 1270 | { |
| 1271 | int i, j, k, cmp; |
| 1272 | |
| 1273 | i = -1; |
| 1274 | j = sizeof(sftp_lookup) / sizeof(*sftp_lookup); |
| 1275 | while (j - i > 1) { |
| 1276 | k = (j + i) / 2; |
| 1277 | cmp = strcmp(name, sftp_lookup[k].name); |
| 1278 | if (cmp < 0) |
| 1279 | j = k; |
| 1280 | else if (cmp > 0) |
| 1281 | i = k; |
| 1282 | else { |
| 1283 | return &sftp_lookup[k]; |
| 1284 | } |
| 1285 | } |
| 1286 | return NULL; |
| 1287 | } |
| 1288 | |
| 1289 | static int sftp_cmd_help(struct sftp_command *cmd) |
| 1290 | { |
| 1291 | int i; |
| 1292 | if (cmd->nwords == 1) { |
| 1293 | /* |
| 1294 | * Give short help on each command. |
| 1295 | */ |
| 1296 | int maxlen; |
| 1297 | maxlen = 0; |
| 1298 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
| 1299 | int len; |
| 1300 | if (!sftp_lookup[i].listed) |
| 1301 | continue; |
| 1302 | len = strlen(sftp_lookup[i].name); |
| 1303 | if (maxlen < len) |
| 1304 | maxlen = len; |
| 1305 | } |
| 1306 | for (i = 0; i < sizeof(sftp_lookup) / sizeof(*sftp_lookup); i++) { |
| 1307 | const struct sftp_cmd_lookup *lookup; |
| 1308 | if (!sftp_lookup[i].listed) |
| 1309 | continue; |
| 1310 | lookup = &sftp_lookup[i]; |
| 1311 | printf("%-*s", maxlen+2, lookup->name); |
| 1312 | if (lookup->longhelp == NULL) |
| 1313 | lookup = lookup_command(lookup->shorthelp); |
| 1314 | printf("%s\n", lookup->shorthelp); |
| 1315 | } |
| 1316 | } else { |
| 1317 | /* |
| 1318 | * Give long help on specific commands. |
| 1319 | */ |
| 1320 | for (i = 1; i < cmd->nwords; i++) { |
| 1321 | const struct sftp_cmd_lookup *lookup; |
| 1322 | lookup = lookup_command(cmd->words[i]); |
| 1323 | if (!lookup) { |
| 1324 | printf("help: %s: command not found\n", cmd->words[i]); |
| 1325 | } else { |
| 1326 | printf("%s", lookup->name); |
| 1327 | if (lookup->longhelp == NULL) |
| 1328 | lookup = lookup_command(lookup->shorthelp); |
| 1329 | printf("%s", lookup->longhelp); |
| 1330 | } |
| 1331 | } |
| 1332 | } |
| 1333 | return 1; |
| 1334 | } |
| 1335 | |
| 1336 | /* ---------------------------------------------------------------------- |
| 1337 | * Command line reading and parsing. |
| 1338 | */ |
| 1339 | struct sftp_command *sftp_getcmd(FILE *fp, int mode, int modeflags) |
| 1340 | { |
| 1341 | char *line; |
| 1342 | int linelen, linesize; |
| 1343 | struct sftp_command *cmd; |
| 1344 | char *p, *q, *r; |
| 1345 | int quoting; |
| 1346 | |
| 1347 | if ((mode == 0) || (modeflags & 1)) { |
| 1348 | printf("psftp> "); |
| 1349 | } |
| 1350 | fflush(stdout); |
| 1351 | |
| 1352 | cmd = snew(struct sftp_command); |
| 1353 | cmd->words = NULL; |
| 1354 | cmd->nwords = 0; |
| 1355 | cmd->wordssize = 0; |
| 1356 | |
| 1357 | line = NULL; |
| 1358 | linesize = linelen = 0; |
| 1359 | while (1) { |
| 1360 | int len; |
| 1361 | char *ret; |
| 1362 | |
| 1363 | linesize += 512; |
| 1364 | line = sresize(line, linesize, char); |
| 1365 | ret = fgets(line + linelen, linesize - linelen, fp); |
| 1366 | |
| 1367 | if (!ret || (linelen == 0 && line[0] == '\0')) { |
| 1368 | cmd->obey = sftp_cmd_quit; |
| 1369 | if ((mode == 0) || (modeflags & 1)) |
| 1370 | printf("quit\n"); |
| 1371 | return cmd; /* eof */ |
| 1372 | } |
| 1373 | len = linelen + strlen(line + linelen); |
| 1374 | linelen += len; |
| 1375 | if (line[linelen - 1] == '\n') { |
| 1376 | linelen--; |
| 1377 | line[linelen] = '\0'; |
| 1378 | break; |
| 1379 | } |
| 1380 | } |
| 1381 | if (modeflags & 1) { |
| 1382 | printf("%s\n", line); |
| 1383 | } |
| 1384 | |
| 1385 | p = line; |
| 1386 | while (*p && (*p == ' ' || *p == '\t')) |
| 1387 | p++; |
| 1388 | |
| 1389 | if (*p == '!') { |
| 1390 | /* |
| 1391 | * Special case: the ! command. This is always parsed as |
| 1392 | * exactly two words: one containing the !, and the second |
| 1393 | * containing everything else on the line. |
| 1394 | */ |
| 1395 | cmd->nwords = cmd->wordssize = 2; |
| 1396 | cmd->words = sresize(cmd->words, cmd->wordssize, char *); |
| 1397 | cmd->words[0] = "!"; |
| 1398 | cmd->words[1] = p+1; |
| 1399 | } else { |
| 1400 | |
| 1401 | /* |
| 1402 | * Parse the command line into words. The syntax is: |
| 1403 | * - double quotes are removed, but cause spaces within to be |
| 1404 | * treated as non-separating. |
| 1405 | * - a double-doublequote pair is a literal double quote, inside |
| 1406 | * _or_ outside quotes. Like this: |
| 1407 | * |
| 1408 | * firstword "second word" "this has ""quotes"" in" and""this"" |
| 1409 | * |
| 1410 | * becomes |
| 1411 | * |
| 1412 | * >firstword< |
| 1413 | * >second word< |
| 1414 | * >this has "quotes" in< |
| 1415 | * >and"this"< |
| 1416 | */ |
| 1417 | while (*p) { |
| 1418 | /* skip whitespace */ |
| 1419 | while (*p && (*p == ' ' || *p == '\t')) |
| 1420 | p++; |
| 1421 | /* mark start of word */ |
| 1422 | q = r = p; /* q sits at start, r writes word */ |
| 1423 | quoting = 0; |
| 1424 | while (*p) { |
| 1425 | if (!quoting && (*p == ' ' || *p == '\t')) |
| 1426 | break; /* reached end of word */ |
| 1427 | else if (*p == '"' && p[1] == '"') |
| 1428 | p += 2, *r++ = '"'; /* a literal quote */ |
| 1429 | else if (*p == '"') |
| 1430 | p++, quoting = !quoting; |
| 1431 | else |
| 1432 | *r++ = *p++; |
| 1433 | } |
| 1434 | if (*p) |
| 1435 | p++; /* skip over the whitespace */ |
| 1436 | *r = '\0'; |
| 1437 | if (cmd->nwords >= cmd->wordssize) { |
| 1438 | cmd->wordssize = cmd->nwords + 16; |
| 1439 | cmd->words = sresize(cmd->words, cmd->wordssize, char *); |
| 1440 | } |
| 1441 | cmd->words[cmd->nwords++] = q; |
| 1442 | } |
| 1443 | } |
| 1444 | |
| 1445 | /* |
| 1446 | * Now parse the first word and assign a function. |
| 1447 | */ |
| 1448 | |
| 1449 | if (cmd->nwords == 0) |
| 1450 | cmd->obey = sftp_cmd_null; |
| 1451 | else { |
| 1452 | const struct sftp_cmd_lookup *lookup; |
| 1453 | lookup = lookup_command(cmd->words[0]); |
| 1454 | if (!lookup) |
| 1455 | cmd->obey = sftp_cmd_unknown; |
| 1456 | else |
| 1457 | cmd->obey = lookup->obey; |
| 1458 | } |
| 1459 | |
| 1460 | return cmd; |
| 1461 | } |
| 1462 | |
| 1463 | static int do_sftp_init(void) |
| 1464 | { |
| 1465 | struct sftp_packet *pktin; |
| 1466 | struct sftp_request *req, *rreq; |
| 1467 | |
| 1468 | /* |
| 1469 | * Do protocol initialisation. |
| 1470 | */ |
| 1471 | if (!fxp_init()) { |
| 1472 | fprintf(stderr, |
| 1473 | "Fatal: unable to initialise SFTP: %s\n", fxp_error()); |
| 1474 | return 1; /* failure */ |
| 1475 | } |
| 1476 | |
| 1477 | /* |
| 1478 | * Find out where our home directory is. |
| 1479 | */ |
| 1480 | sftp_register(req = fxp_realpath_send(".")); |
| 1481 | rreq = sftp_find_request(pktin = sftp_recv()); |
| 1482 | assert(rreq == req); |
| 1483 | homedir = fxp_realpath_recv(pktin, rreq); |
| 1484 | |
| 1485 | if (!homedir) { |
| 1486 | fprintf(stderr, |
| 1487 | "Warning: failed to resolve home directory: %s\n", |
| 1488 | fxp_error()); |
| 1489 | homedir = dupstr("."); |
| 1490 | } else { |
| 1491 | printf("Remote working directory is %s\n", homedir); |
| 1492 | } |
| 1493 | pwd = dupstr(homedir); |
| 1494 | return 0; |
| 1495 | } |
| 1496 | |
| 1497 | void do_sftp(int mode, int modeflags, char *batchfile) |
| 1498 | { |
| 1499 | FILE *fp; |
| 1500 | int ret; |
| 1501 | |
| 1502 | /* |
| 1503 | * Batch mode? |
| 1504 | */ |
| 1505 | if (mode == 0) { |
| 1506 | |
| 1507 | /* ------------------------------------------------------------------ |
| 1508 | * Now we're ready to do Real Stuff. |
| 1509 | */ |
| 1510 | while (1) { |
| 1511 | struct sftp_command *cmd; |
| 1512 | cmd = sftp_getcmd(stdin, 0, 0); |
| 1513 | if (!cmd) |
| 1514 | break; |
| 1515 | if (cmd->obey(cmd) < 0) |
| 1516 | break; |
| 1517 | } |
| 1518 | } else { |
| 1519 | fp = fopen(batchfile, "r"); |
| 1520 | if (!fp) { |
| 1521 | printf("Fatal: unable to open %s\n", batchfile); |
| 1522 | return; |
| 1523 | } |
| 1524 | while (1) { |
| 1525 | struct sftp_command *cmd; |
| 1526 | cmd = sftp_getcmd(fp, mode, modeflags); |
| 1527 | if (!cmd) |
| 1528 | break; |
| 1529 | ret = cmd->obey(cmd); |
| 1530 | if (ret < 0) |
| 1531 | break; |
| 1532 | if (ret == 0) { |
| 1533 | if (!(modeflags & 2)) |
| 1534 | break; |
| 1535 | } |
| 1536 | } |
| 1537 | fclose(fp); |
| 1538 | |
| 1539 | } |
| 1540 | } |
| 1541 | |
| 1542 | /* ---------------------------------------------------------------------- |
| 1543 | * Dirty bits: integration with PuTTY. |
| 1544 | */ |
| 1545 | |
| 1546 | static int verbose = 0; |
| 1547 | |
| 1548 | /* |
| 1549 | * Print an error message and perform a fatal exit. |
| 1550 | */ |
| 1551 | void fatalbox(char *fmt, ...) |
| 1552 | { |
| 1553 | char *str, *str2; |
| 1554 | va_list ap; |
| 1555 | va_start(ap, fmt); |
| 1556 | str = dupvprintf(fmt, ap); |
| 1557 | str2 = dupcat("Fatal: ", str, "\n", NULL); |
| 1558 | sfree(str); |
| 1559 | va_end(ap); |
| 1560 | fputs(str2, stderr); |
| 1561 | sfree(str2); |
| 1562 | |
| 1563 | cleanup_exit(1); |
| 1564 | } |
| 1565 | void modalfatalbox(char *fmt, ...) |
| 1566 | { |
| 1567 | char *str, *str2; |
| 1568 | va_list ap; |
| 1569 | va_start(ap, fmt); |
| 1570 | str = dupvprintf(fmt, ap); |
| 1571 | str2 = dupcat("Fatal: ", str, "\n", NULL); |
| 1572 | sfree(str); |
| 1573 | va_end(ap); |
| 1574 | fputs(str2, stderr); |
| 1575 | sfree(str2); |
| 1576 | |
| 1577 | cleanup_exit(1); |
| 1578 | } |
| 1579 | void connection_fatal(void *frontend, char *fmt, ...) |
| 1580 | { |
| 1581 | char *str, *str2; |
| 1582 | va_list ap; |
| 1583 | va_start(ap, fmt); |
| 1584 | str = dupvprintf(fmt, ap); |
| 1585 | str2 = dupcat("Fatal: ", str, "\n", NULL); |
| 1586 | sfree(str); |
| 1587 | va_end(ap); |
| 1588 | fputs(str2, stderr); |
| 1589 | sfree(str2); |
| 1590 | |
| 1591 | cleanup_exit(1); |
| 1592 | } |
| 1593 | |
| 1594 | void ldisc_send(void *handle, char *buf, int len, int interactive) |
| 1595 | { |
| 1596 | /* |
| 1597 | * This is only here because of the calls to ldisc_send(NULL, |
| 1598 | * 0) in ssh.c. Nothing in PSFTP actually needs to use the |
| 1599 | * ldisc as an ldisc. So if we get called with any real data, I |
| 1600 | * want to know about it. |
| 1601 | */ |
| 1602 | assert(len == 0); |
| 1603 | } |
| 1604 | |
| 1605 | /* |
| 1606 | * In psftp, all agent requests should be synchronous, so this is a |
| 1607 | * never-called stub. |
| 1608 | */ |
| 1609 | void agent_schedule_callback(void (*callback)(void *, void *, int), |
| 1610 | void *callback_ctx, void *data, int len) |
| 1611 | { |
| 1612 | assert(!"We shouldn't be here"); |
| 1613 | } |
| 1614 | |
| 1615 | /* |
| 1616 | * Receive a block of data from the SSH link. Block until all data |
| 1617 | * is available. |
| 1618 | * |
| 1619 | * To do this, we repeatedly call the SSH protocol module, with our |
| 1620 | * own trap in from_backend() to catch the data that comes back. We |
| 1621 | * do this until we have enough data. |
| 1622 | */ |
| 1623 | |
| 1624 | static unsigned char *outptr; /* where to put the data */ |
| 1625 | static unsigned outlen; /* how much data required */ |
| 1626 | static unsigned char *pending = NULL; /* any spare data */ |
| 1627 | static unsigned pendlen = 0, pendsize = 0; /* length and phys. size of buffer */ |
| 1628 | int from_backend(void *frontend, int is_stderr, const char *data, int datalen) |
| 1629 | { |
| 1630 | unsigned char *p = (unsigned char *) data; |
| 1631 | unsigned len = (unsigned) datalen; |
| 1632 | |
| 1633 | assert(len > 0); |
| 1634 | |
| 1635 | /* |
| 1636 | * stderr data is just spouted to local stderr and otherwise |
| 1637 | * ignored. |
| 1638 | */ |
| 1639 | if (is_stderr) { |
| 1640 | fwrite(data, 1, len, stderr); |
| 1641 | return 0; |
| 1642 | } |
| 1643 | |
| 1644 | /* |
| 1645 | * If this is before the real session begins, just return. |
| 1646 | */ |
| 1647 | if (!outptr) |
| 1648 | return 0; |
| 1649 | |
| 1650 | if (outlen > 0) { |
| 1651 | unsigned used = outlen; |
| 1652 | if (used > len) |
| 1653 | used = len; |
| 1654 | memcpy(outptr, p, used); |
| 1655 | outptr += used; |
| 1656 | outlen -= used; |
| 1657 | p += used; |
| 1658 | len -= used; |
| 1659 | } |
| 1660 | |
| 1661 | if (len > 0) { |
| 1662 | if (pendsize < pendlen + len) { |
| 1663 | pendsize = pendlen + len + 4096; |
| 1664 | pending = sresize(pending, pendsize, unsigned char); |
| 1665 | } |
| 1666 | memcpy(pending + pendlen, p, len); |
| 1667 | pendlen += len; |
| 1668 | } |
| 1669 | |
| 1670 | return 0; |
| 1671 | } |
| 1672 | int sftp_recvdata(char *buf, int len) |
| 1673 | { |
| 1674 | outptr = (unsigned char *) buf; |
| 1675 | outlen = len; |
| 1676 | |
| 1677 | /* |
| 1678 | * See if the pending-input block contains some of what we |
| 1679 | * need. |
| 1680 | */ |
| 1681 | if (pendlen > 0) { |
| 1682 | unsigned pendused = pendlen; |
| 1683 | if (pendused > outlen) |
| 1684 | pendused = outlen; |
| 1685 | memcpy(outptr, pending, pendused); |
| 1686 | memmove(pending, pending + pendused, pendlen - pendused); |
| 1687 | outptr += pendused; |
| 1688 | outlen -= pendused; |
| 1689 | pendlen -= pendused; |
| 1690 | if (pendlen == 0) { |
| 1691 | pendsize = 0; |
| 1692 | sfree(pending); |
| 1693 | pending = NULL; |
| 1694 | } |
| 1695 | if (outlen == 0) |
| 1696 | return 1; |
| 1697 | } |
| 1698 | |
| 1699 | while (outlen > 0) { |
| 1700 | if (ssh_sftp_loop_iteration() < 0) |
| 1701 | return 0; /* doom */ |
| 1702 | } |
| 1703 | |
| 1704 | return 1; |
| 1705 | } |
| 1706 | int sftp_senddata(char *buf, int len) |
| 1707 | { |
| 1708 | back->send(backhandle, (unsigned char *) buf, len); |
| 1709 | return 1; |
| 1710 | } |
| 1711 | |
| 1712 | /* |
| 1713 | * Short description of parameters. |
| 1714 | */ |
| 1715 | static void usage(void) |
| 1716 | { |
| 1717 | printf("PuTTY Secure File Transfer (SFTP) client\n"); |
| 1718 | printf("%s\n", ver); |
| 1719 | printf("Usage: psftp [options] user@host\n"); |
| 1720 | printf("Options:\n"); |
| 1721 | printf(" -b file use specified batchfile\n"); |
| 1722 | printf(" -bc output batchfile commands\n"); |
| 1723 | printf(" -be don't stop batchfile processing if errors\n"); |
| 1724 | printf(" -v show verbose messages\n"); |
| 1725 | printf(" -load sessname Load settings from saved session\n"); |
| 1726 | printf(" -l user connect with specified username\n"); |
| 1727 | printf(" -P port connect to specified port\n"); |
| 1728 | printf(" -pw passw login with specified password\n"); |
| 1729 | printf(" -1 -2 force use of particular SSH protocol version\n"); |
| 1730 | printf(" -C enable compression\n"); |
| 1731 | printf(" -i key private key file for authentication\n"); |
| 1732 | printf(" -batch disable all interactive prompts\n"); |
| 1733 | cleanup_exit(1); |
| 1734 | } |
| 1735 | |
| 1736 | /* |
| 1737 | * Connect to a host. |
| 1738 | */ |
| 1739 | static int psftp_connect(char *userhost, char *user, int portnumber) |
| 1740 | { |
| 1741 | char *host, *realhost; |
| 1742 | const char *err; |
| 1743 | void *logctx; |
| 1744 | |
| 1745 | /* Separate host and username */ |
| 1746 | host = userhost; |
| 1747 | host = strrchr(host, '@'); |
| 1748 | if (host == NULL) { |
| 1749 | host = userhost; |
| 1750 | } else { |
| 1751 | *host++ = '\0'; |
| 1752 | if (user) { |
| 1753 | printf("psftp: multiple usernames specified; using \"%s\"\n", |
| 1754 | user); |
| 1755 | } else |
| 1756 | user = userhost; |
| 1757 | } |
| 1758 | |
| 1759 | /* Try to load settings for this host */ |
| 1760 | do_defaults(host, &cfg); |
| 1761 | if (cfg.host[0] == '\0') { |
| 1762 | /* No settings for this host; use defaults */ |
| 1763 | do_defaults(NULL, &cfg); |
| 1764 | strncpy(cfg.host, host, sizeof(cfg.host) - 1); |
| 1765 | cfg.host[sizeof(cfg.host) - 1] = '\0'; |
| 1766 | } |
| 1767 | |
| 1768 | /* |
| 1769 | * Force use of SSH. (If they got the protocol wrong we assume the |
| 1770 | * port is useless too.) |
| 1771 | */ |
| 1772 | if (cfg.protocol != PROT_SSH) { |
| 1773 | cfg.protocol = PROT_SSH; |
| 1774 | cfg.port = 22; |
| 1775 | } |
| 1776 | |
| 1777 | /* |
| 1778 | * Enact command-line overrides. |
| 1779 | */ |
| 1780 | cmdline_run_saved(&cfg); |
| 1781 | |
| 1782 | /* |
| 1783 | * Trim leading whitespace off the hostname if it's there. |
| 1784 | */ |
| 1785 | { |
| 1786 | int space = strspn(cfg.host, " \t"); |
| 1787 | memmove(cfg.host, cfg.host+space, 1+strlen(cfg.host)-space); |
| 1788 | } |
| 1789 | |
| 1790 | /* See if host is of the form user@host */ |
| 1791 | if (cfg.host[0] != '\0') { |
| 1792 | char *atsign = strchr(cfg.host, '@'); |
| 1793 | /* Make sure we're not overflowing the user field */ |
| 1794 | if (atsign) { |
| 1795 | if (atsign - cfg.host < sizeof cfg.username) { |
| 1796 | strncpy(cfg.username, cfg.host, atsign - cfg.host); |
| 1797 | cfg.username[atsign - cfg.host] = '\0'; |
| 1798 | } |
| 1799 | memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1)); |
| 1800 | } |
| 1801 | } |
| 1802 | |
| 1803 | /* |
| 1804 | * Trim a colon suffix off the hostname if it's there. |
| 1805 | */ |
| 1806 | cfg.host[strcspn(cfg.host, ":")] = '\0'; |
| 1807 | |
| 1808 | /* |
| 1809 | * Remove any remaining whitespace from the hostname. |
| 1810 | */ |
| 1811 | { |
| 1812 | int p1 = 0, p2 = 0; |
| 1813 | while (cfg.host[p2] != '\0') { |
| 1814 | if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t') { |
| 1815 | cfg.host[p1] = cfg.host[p2]; |
| 1816 | p1++; |
| 1817 | } |
| 1818 | p2++; |
| 1819 | } |
| 1820 | cfg.host[p1] = '\0'; |
| 1821 | } |
| 1822 | |
| 1823 | /* Set username */ |
| 1824 | if (user != NULL && user[0] != '\0') { |
| 1825 | strncpy(cfg.username, user, sizeof(cfg.username) - 1); |
| 1826 | cfg.username[sizeof(cfg.username) - 1] = '\0'; |
| 1827 | } |
| 1828 | if (!cfg.username[0]) { |
| 1829 | printf("login as: "); |
| 1830 | fflush(stdout); |
| 1831 | if (!fgets(cfg.username, sizeof(cfg.username), stdin)) { |
| 1832 | fprintf(stderr, "psftp: aborting\n"); |
| 1833 | cleanup_exit(1); |
| 1834 | } else { |
| 1835 | int len = strlen(cfg.username); |
| 1836 | if (cfg.username[len - 1] == '\n') |
| 1837 | cfg.username[len - 1] = '\0'; |
| 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | if (portnumber) |
| 1842 | cfg.port = portnumber; |
| 1843 | |
| 1844 | /* SFTP uses SSH2 by default always */ |
| 1845 | cfg.sshprot = 2; |
| 1846 | |
| 1847 | /* |
| 1848 | * Disable scary things which shouldn't be enabled for simple |
| 1849 | * things like SCP and SFTP: agent forwarding, port forwarding, |
| 1850 | * X forwarding. |
| 1851 | */ |
| 1852 | cfg.x11_forward = 0; |
| 1853 | cfg.agentfwd = 0; |
| 1854 | cfg.portfwd[0] = cfg.portfwd[1] = '\0'; |
| 1855 | |
| 1856 | /* Set up subsystem name. */ |
| 1857 | strcpy(cfg.remote_cmd, "sftp"); |
| 1858 | cfg.ssh_subsys = TRUE; |
| 1859 | cfg.nopty = TRUE; |
| 1860 | |
| 1861 | /* |
| 1862 | * Set up fallback option, for SSH1 servers or servers with the |
| 1863 | * sftp subsystem not enabled but the server binary installed |
| 1864 | * in the usual place. We only support fallback on Unix |
| 1865 | * systems, and we use a kludgy piece of shellery which should |
| 1866 | * try to find sftp-server in various places (the obvious |
| 1867 | * systemwide spots /usr/lib and /usr/local/lib, and then the |
| 1868 | * user's PATH) and finally give up. |
| 1869 | * |
| 1870 | * test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server |
| 1871 | * test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server |
| 1872 | * exec sftp-server |
| 1873 | * |
| 1874 | * the idea being that this will attempt to use either of the |
| 1875 | * obvious pathnames and then give up, and when it does give up |
| 1876 | * it will print the preferred pathname in the error messages. |
| 1877 | */ |
| 1878 | cfg.remote_cmd_ptr2 = |
| 1879 | "test -x /usr/lib/sftp-server && exec /usr/lib/sftp-server\n" |
| 1880 | "test -x /usr/local/lib/sftp-server && exec /usr/local/lib/sftp-server\n" |
| 1881 | "exec sftp-server"; |
| 1882 | cfg.ssh_subsys2 = FALSE; |
| 1883 | |
| 1884 | back = &ssh_backend; |
| 1885 | |
| 1886 | err = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, &realhost,0); |
| 1887 | if (err != NULL) { |
| 1888 | fprintf(stderr, "ssh_init: %s\n", err); |
| 1889 | return 1; |
| 1890 | } |
| 1891 | logctx = log_init(NULL, &cfg); |
| 1892 | back->provide_logctx(backhandle, logctx); |
| 1893 | console_provide_logctx(logctx); |
| 1894 | while (!back->sendok(backhandle)) { |
| 1895 | if (ssh_sftp_loop_iteration() < 0) { |
| 1896 | fprintf(stderr, "ssh_init: error during SSH connection setup\n"); |
| 1897 | return 1; |
| 1898 | } |
| 1899 | } |
| 1900 | if (verbose && realhost != NULL) |
| 1901 | printf("Connected to %s\n", realhost); |
| 1902 | return 0; |
| 1903 | } |
| 1904 | |
| 1905 | void cmdline_error(char *p, ...) |
| 1906 | { |
| 1907 | va_list ap; |
| 1908 | fprintf(stderr, "psftp: "); |
| 1909 | va_start(ap, p); |
| 1910 | vfprintf(stderr, p, ap); |
| 1911 | va_end(ap); |
| 1912 | fprintf(stderr, "\n try typing \"psftp -h\" for help\n"); |
| 1913 | exit(1); |
| 1914 | } |
| 1915 | |
| 1916 | /* |
| 1917 | * Main program. Parse arguments etc. |
| 1918 | */ |
| 1919 | int psftp_main(int argc, char *argv[]) |
| 1920 | { |
| 1921 | int i; |
| 1922 | int portnumber = 0; |
| 1923 | char *userhost, *user; |
| 1924 | int mode = 0; |
| 1925 | int modeflags = 0; |
| 1926 | char *batchfile = NULL; |
| 1927 | int errors = 0; |
| 1928 | |
| 1929 | flags = FLAG_STDERR | FLAG_INTERACTIVE |
| 1930 | #ifdef FLAG_SYNCAGENT |
| 1931 | | FLAG_SYNCAGENT |
| 1932 | #endif |
| 1933 | ; |
| 1934 | cmdline_tooltype = TOOLTYPE_FILETRANSFER; |
| 1935 | ssh_get_line = &console_get_line; |
| 1936 | sk_init(); |
| 1937 | |
| 1938 | userhost = user = NULL; |
| 1939 | |
| 1940 | errors = 0; |
| 1941 | for (i = 1; i < argc; i++) { |
| 1942 | int ret; |
| 1943 | if (argv[i][0] != '-') { |
| 1944 | if (userhost) |
| 1945 | usage(); |
| 1946 | else |
| 1947 | userhost = dupstr(argv[i]); |
| 1948 | continue; |
| 1949 | } |
| 1950 | ret = cmdline_process_param(argv[i], i+1<argc?argv[i+1]:NULL, 1, &cfg); |
| 1951 | if (ret == -2) { |
| 1952 | cmdline_error("option \"%s\" requires an argument", argv[i]); |
| 1953 | } else if (ret == 2) { |
| 1954 | i++; /* skip next argument */ |
| 1955 | } else if (ret == 1) { |
| 1956 | /* We have our own verbosity in addition to `flags'. */ |
| 1957 | if (flags & FLAG_VERBOSE) |
| 1958 | verbose = 1; |
| 1959 | } else if (strcmp(argv[i], "-h") == 0 || |
| 1960 | strcmp(argv[i], "-?") == 0) { |
| 1961 | usage(); |
| 1962 | } else if (strcmp(argv[i], "-batch") == 0) { |
| 1963 | console_batch_mode = 1; |
| 1964 | } else if (strcmp(argv[i], "-b") == 0 && i + 1 < argc) { |
| 1965 | mode = 1; |
| 1966 | batchfile = argv[++i]; |
| 1967 | } else if (strcmp(argv[i], "-bc") == 0) { |
| 1968 | modeflags = modeflags | 1; |
| 1969 | } else if (strcmp(argv[i], "-be") == 0) { |
| 1970 | modeflags = modeflags | 2; |
| 1971 | } else if (strcmp(argv[i], "--") == 0) { |
| 1972 | i++; |
| 1973 | break; |
| 1974 | } else { |
| 1975 | cmdline_error("unknown option \"%s\"", argv[i]); |
| 1976 | } |
| 1977 | } |
| 1978 | argc -= i; |
| 1979 | argv += i; |
| 1980 | back = NULL; |
| 1981 | |
| 1982 | /* |
| 1983 | * If a user@host string has already been provided, connect to |
| 1984 | * it now. |
| 1985 | */ |
| 1986 | if (userhost) { |
| 1987 | if (psftp_connect(userhost, user, portnumber)) |
| 1988 | return 1; |
| 1989 | if (do_sftp_init()) |
| 1990 | return 1; |
| 1991 | } else { |
| 1992 | printf("psftp: no hostname specified; use \"open host.name\"" |
| 1993 | " to connect\n"); |
| 1994 | } |
| 1995 | |
| 1996 | do_sftp(mode, modeflags, batchfile); |
| 1997 | |
| 1998 | if (back != NULL && back->socket(backhandle) != NULL) { |
| 1999 | char ch; |
| 2000 | back->special(backhandle, TS_EOF); |
| 2001 | sftp_recvdata(&ch, 1); |
| 2002 | } |
| 2003 | random_save_seed(); |
| 2004 | |
| 2005 | return 0; |
| 2006 | } |