1/* send.c 2 Routines to send a file. 3 4 Copyright (C) 1991, 1992, 1993, 1994, 1995, 2002 Ian Lance Taylor 5 6 This file is part of the Taylor UUCP package. 7 8 This program is free software; you can redistribute it and/or 9 modify it under the terms of the GNU General Public License as 10 published by the Free Software Foundation; either version 2 of the 11 License, or (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program; if not, write to the Free Software 20 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 21 22 The author of the program may be contacted at ian@airs.com. 23 */ 24 25#include "uucp.h" 26 27#if USE_RCS_ID 28const char send_rcsid[] = "$Id: send.c,v 1.57 2002/03/05 19:10:41 ian Rel $"; 29#endif 30 31#include <errno.h> 32 33#include "uudefs.h" 34#include "uuconf.h" 35#include "system.h" 36#include "prot.h" 37#include "trans.h" 38 39/* We keep this information in the pinfo field of the stransfer 40 structure. */ 41struct ssendinfo 42{ 43 /* Local user to send mail to (may be NULL). */ 44 char *zmail; 45 /* Full file name. */ 46 char *zfile; 47 /* Number of bytes in file. */ 48 long cbytes; 49 /* TRUE if this was a local request. */ 50 boolean flocal; 51 /* TRUE if this is a spool directory file. */ 52 boolean fspool; 53 /* TRUE if the file has been completely sent. */ 54 boolean fsent; 55 /* TRUE if the file send will never succeed; used by 56 flocal_send_cancelled. */ 57 boolean fnever; 58 /* Execution file for sending an unsupported E request. */ 59 char *zexec; 60 /* Confirmation command received in fsend_await_confirm. */ 61 char *zconfirm; 62}; 63 64/* Local functions. */ 65 66static void usfree_send P((struct stransfer *qtrans)); 67static boolean flocal_send_fail P((struct scmd *qcmd, 68 struct sdaemon *qdaemon, 69 const char *zwhy)); 70static boolean flocal_send_request P((struct stransfer *qtrans, 71 struct sdaemon *qdaemon)); 72static boolean flocal_send_await_reply P((struct stransfer *qtrans, 73 struct sdaemon *qdaemon, 74 const char *zdata, size_t cdata)); 75static boolean flocal_send_cancelled P((struct stransfer *qtrans, 76 struct sdaemon *qdaemon)); 77static boolean flocal_send_open_file P((struct stransfer *qtrans, 78 struct sdaemon *qdaemon)); 79static boolean fremote_rec_fail P((struct sdaemon *qdaemon, 80 enum tfailure twhy, int iremote)); 81static boolean fremote_rec_fail_send P((struct stransfer *qtrans, 82 struct sdaemon *qdaemon)); 83static boolean fremote_rec_reply P((struct stransfer *qtrans, 84 struct sdaemon *qdaemon)); 85static boolean fsend_file_end P((struct stransfer *qtrans, 86 struct sdaemon *qdaemon)); 87static boolean fsend_await_confirm P((struct stransfer *qtrans, 88 struct sdaemon *qdaemon, 89 const char *zdata, size_t cdata)); 90static boolean fsend_exec_file_init P((struct stransfer *qtrans, 91 struct sdaemon *qdaemon)); 92static void usadd_exec_line P((char **pz, size_t *pcalc, size_t *pclen, 93 int bcmd, const char *z1, const char *z2, 94 boolean fquote)); 95static boolean fsend_exec_file P((struct stransfer *qtrans, 96 struct sdaemon *qdaemon)); 97 98/* Free up a send stransfer structure. */ 99 100static void 101usfree_send (qtrans) 102 struct stransfer *qtrans; 103{ 104 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 105 106 if (qinfo != NULL) 107 { 108 ubuffree (qinfo->zmail); 109 ubuffree (qinfo->zfile); 110 ubuffree (qinfo->zexec); 111 ubuffree (qinfo->zconfirm); 112 xfree (qtrans->pinfo); 113 } 114 115 utransfree (qtrans); 116} 117 118/* Set up a local request to send a file. This may be called before 119 we have even tried to call the remote system. 120 121 If we are using a traditional protocol, which doesn't support 122 channel numbers and doesn't permit the file to be sent until an 123 acknowledgement has been received, the sequence of function calls 124 looks like this: 125 126 flocal_send_file_init --> fqueue_local 127 flocal_send_request (sends S request) --> fqueue_receive 128 flocal_send_await_reply (waits for SY) --> fqueue_send 129 flocal_send_open_file (opens file, calls pffile) --> fqueue_send 130 send file 131 fsend_file_end (calls pffile) --> fqueue_receive 132 fsend_await_confirm (waits for CY) 133 134 If flocal_send_await_reply gets an SN, it deletes the request. If 135 the SY reply contains a file position at which to start sending, 136 flocal_send_await_reply sets qinfo->ipos. 137 138 This gets more complex if the protocol supports channels. In that 139 case, we want to start sending the file data immediately, to avoid 140 the round trip delay between flocal_send_request and 141 flocal_send_await_reply. To do this, flocal_send_request calls 142 fqueue_send rather than fqueue_receive. The main execution 143 sequence looks like this: 144 145 flocal_send_file_init --> fqueue_local 146 flocal_send_request (sends S request) --> fqueue_send 147 flocal_send_open_file (opens file, calls pffile) --> fqueue_send 148 send file 149 fsend_file_end (calls pffile) --> fqueue_receive 150 sometime: flocal_send_await_reply (waits for SY) 151 fsend_await_confirm (waits for CY) 152 153 In this case flocal_send_await_reply must be run before 154 fsend_await_confirm; it may be run anytime after 155 flocal_send_request. 156 157 If flocal_send_await_reply is called before the entire file has 158 been sent: if it gets an SN, it sets the file position to the end 159 and arranges to call flocal_send_cancelled. If it gets a file 160 position request, it must adjust the file position accordingly. 161 162 If flocal_send_await_reply is called after the entire file has been 163 sent: if it gets an SN, it can simply delete the request. It can 164 ignore any file position request. 165 166 If the request is not deleted, flocal_send_await_reply must arrange 167 for the next string to be passed to fsend_await_confirm. 168 Presumably fsend_await_confirm will only be called after the entire 169 file has been sent. 170 171 Just to make things even more complex, these same routines support 172 sending execution requests, since that is much like sending a file. 173 For an execution request, the bcmd character will be E rather than 174 S. If an execution request is being sent to a system which does 175 not support them, it must be sent as two S requests instead. The 176 second one will be the execution file, but no actual file is 177 created; instead the zexec and znext fields in the ssendinfo 178 structure are used. So if the bcmd character is E, then if the 179 zexec field is NULL, the data file is being sent, otherwise the 180 fake execution file is being sent. */ 181 182boolean 183flocal_send_file_init (qdaemon, qcmd) 184 struct sdaemon *qdaemon; 185 struct scmd *qcmd; 186{ 187 const struct uuconf_system *qsys; 188 boolean fspool; 189 char *zfile; 190 long cbytes; 191 struct ssendinfo *qinfo; 192 struct stransfer *qtrans; 193 194 qsys = qdaemon->qsys; 195 196 if (qdaemon->fcaller 197 ? ! qsys->uuconf_fcall_transfer 198 : ! qsys->uuconf_fcalled_transfer) 199 { 200 /* uux or uucp should have already made sure that the transfer 201 is possible, but it might have changed since then. */ 202 if (! qsys->uuconf_fcall_transfer 203 && ! qsys->uuconf_fcalled_transfer) 204 return flocal_send_fail (qcmd, qdaemon, 205 "not permitted to transfer files"); 206 207 /* We can't do the request now, but it may get done later. */ 208 return TRUE; 209 } 210 211 /* The 'C' option means that the file has been copied to the spool 212 directory. */ 213 if (strchr (qcmd->zoptions, 'C') == NULL 214 && ! fspool_file (qcmd->zfrom)) 215 { 216 fspool = FALSE; 217 if (! fin_directory_list (qcmd->zfrom, 218 qsys->uuconf_pzlocal_send, 219 qsys->uuconf_zpubdir, TRUE, 220 TRUE, qcmd->zuser)) 221 return flocal_send_fail (qcmd, qdaemon, "not permitted to send"); 222 zfile = zbufcpy (qcmd->zfrom); 223 } 224 else 225 { 226 fspool = TRUE; 227 zfile = zsysdep_spool_file_name (qsys, qcmd->ztemp, qcmd->pseq); 228 if (zfile == NULL) 229 return FALSE; 230 } 231 232 /* Make sure we meet any local size restrictions. The connection 233 may not have been opened at this point, so we can't check remote 234 size restrictions. */ 235 cbytes = csysdep_size (zfile); 236 if (cbytes < 0) 237 { 238 ubuffree (zfile); 239 if (cbytes != -1) 240 return flocal_send_fail (qcmd, qdaemon, "can not get size"); 241 /* A cbytes value of -1 means that the file does not exist. 242 This can happen legitimately if it has already been sent from 243 the spool directory. */ 244 if (! fspool) 245 return flocal_send_fail (qcmd, qdaemon, "does not exist"); 246 (void) fsysdep_did_work (qcmd->pseq); 247 return TRUE; 248 } 249 250 if (qdaemon->clocal_size != -1 251 && qdaemon->clocal_size < cbytes) 252 { 253 ubuffree (zfile); 254 255 if (qdaemon->cmax_ever == -2) 256 { 257 long c1, c2; 258 259 c1 = cmax_size_ever (qsys->uuconf_qcall_local_size); 260 c2 = cmax_size_ever (qsys->uuconf_qcalled_local_size); 261 if (c1 > c2) 262 qdaemon->cmax_ever = c1; 263 else 264 qdaemon->cmax_ever = c2; 265 } 266 267 if (qdaemon->cmax_ever != -1 268 && qdaemon->cmax_ever < qcmd->cbytes) 269 return flocal_send_fail (qcmd, qdaemon, "too large to send"); 270 271 return TRUE; 272 } 273 274 /* We are now prepared to send the command to the remote system. We 275 queue up a transfer request to send the command when we are 276 ready. */ 277 qinfo = (struct ssendinfo *) xmalloc (sizeof (struct ssendinfo)); 278 if (strchr (qcmd->zoptions, 'm') == NULL) 279 qinfo->zmail = NULL; 280 else 281 qinfo->zmail = zbufcpy (qcmd->zuser); 282 qinfo->zfile = zfile; 283 qinfo->cbytes = cbytes; 284 qinfo->flocal = strchr (qcmd->zuser, '!') == NULL; 285 qinfo->fspool = fspool; 286 qinfo->fsent = FALSE; 287 qinfo->zexec = NULL; 288 qinfo->zconfirm = NULL; 289 290 qtrans = qtransalc (qcmd); 291 qtrans->psendfn = flocal_send_request; 292 qtrans->pinfo = (pointer) qinfo; 293 294 return fqueue_local (qdaemon, qtrans); 295} 296 297/* Clean up after a failing local send request. If zwhy is not NULL, 298 this reports an error to the log file and to the user. */ 299 300static boolean 301flocal_send_fail (qcmd, qdaemon, zwhy) 302 struct scmd *qcmd; 303 struct sdaemon *qdaemon; 304 const char *zwhy; 305{ 306 if (zwhy != NULL) 307 { 308 const char *zfrom; 309 char *zfree; 310 const char *ztemp; 311 312 if (qcmd->bcmd != 'E') 313 { 314 zfrom = qcmd->zfrom; 315 zfree = NULL; 316 } 317 else 318 { 319 zfree = zbufalc (strlen (qcmd->zfrom) 320 + sizeof " (execution of \"\")" 321 + strlen (qcmd->zcmd)); 322 sprintf (zfree, "%s (execution of \"%s\")", qcmd->zfrom, 323 qcmd->zcmd); 324 zfrom = zfree; 325 } 326 327 ulog (LOG_ERROR, "%s: %s", zfrom, zwhy); 328 329 /* We only save the temporary file if this is a request from the 330 local system; otherwise a remote system could launch a denial 331 of service attack by filling up the .Preserve directory 332 (local users have much simpler methods for this type of 333 denial of service attack, so there is little point to using a 334 more sophisticated scheme). */ 335 if (strchr (qcmd->zuser, '!') == NULL) 336 ztemp = zsysdep_save_temp_file (qcmd->pseq); 337 else 338 ztemp = NULL; 339 (void) fmail_transfer (FALSE, qcmd->zuser, (const char *) NULL, 340 zwhy, zfrom, (const char *) NULL, 341 qcmd->zto, qdaemon->qsys->uuconf_zname, ztemp); 342 343 ubuffree (zfree); 344 } 345 346 (void) fsysdep_did_work (qcmd->pseq); 347 348 return TRUE; 349} 350 351/* This is called when we are ready to send the request to the remote 352 system. We form the request and send it over. If the protocol 353 does not support multiple channels, we start waiting for the 354 response; otherwise we can start sending the file immediately. */ 355 356static boolean 357flocal_send_request (qtrans, qdaemon) 358 struct stransfer *qtrans; 359 struct sdaemon *qdaemon; 360{ 361 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 362 boolean fquote; 363 const struct scmd *qcmd; 364 struct scmd squoted; 365 const char *znotify; 366 char absize[20]; 367 char *zsend; 368 boolean fret; 369 370 /* Make sure the file meets any remote size restrictions. */ 371 if (qdaemon->cmax_receive != -1 372 && qdaemon->cmax_receive < qinfo->cbytes) 373 { 374 fret = flocal_send_fail (&qtrans->s, qdaemon, "too large for receiver"); 375 usfree_send (qtrans); 376 return fret; 377 } 378 379 /* Make sure the file still exists--it may have been removed between 380 the conversation startup and now. After we have sent over the S 381 command we must give an error if we can't find the file. */ 382 if (! fsysdep_file_exists (qinfo->zfile)) 383 { 384 (void) fsysdep_did_work (qtrans->s.pseq); 385 usfree_send (qtrans); 386 return TRUE; 387 } 388 389 /* If we are using a protocol which can make multiple channels, then 390 we can open and send the file whenever we are ready. This is 391 because we will be able to distinguish the response by the 392 channel it is directed to. This assumes that every protocol 393 which supports multiple channels also supports sending the file 394 position in mid-stream, since otherwise we would not be able to 395 restart files. */ 396 qtrans->fcmd = TRUE; 397 qtrans->psendfn = flocal_send_open_file; 398 qtrans->precfn = flocal_send_await_reply; 399 400 if (qdaemon->cchans > 1) 401 fret = fqueue_send (qdaemon, qtrans); 402 else 403 fret = fqueue_receive (qdaemon, qtrans); 404 if (! fret) 405 return FALSE; 406 407 fquote = fcmd_needs_quotes (&qtrans->s); 408 if (! fquote) 409 qcmd = &qtrans->s; 410 else 411 { 412 if ((qdaemon->ifeatures & FEATURE_QUOTES) == 0) 413 { 414 fret = flocal_send_fail (&qtrans->s, qdaemon, 415 "remote system does not support required quoting"); 416 usfree_send (qtrans); 417 return fret; 418 } 419 uquote_cmd (&qtrans->s, &squoted); 420 qcmd = &squoted; 421 } 422 423 /* Construct the notify string to send. If we are going to send a 424 size or an execution command, it must be non-empty. */ 425 znotify = qcmd->znotify; 426 if (znotify == NULL) 427 znotify = ""; 428 if ((qdaemon->ifeatures & FEATURE_SIZES) != 0 429 || (qcmd->bcmd == 'E' 430 && (qdaemon->ifeatures & FEATURE_EXEC) != 0)) 431 { 432 if (*znotify == '\0') 433 znotify = "\"\""; 434 } 435 else 436 { 437 /* We don't need a notify string. Some crufty UUCP code can't 438 handle a pair of double quotes. */ 439 if (strcmp (znotify, "\"\"") == 0) 440 znotify = ""; 441 } 442 443 /* Construct the size string to send. */ 444 if ((qdaemon->ifeatures & FEATURE_SIZES) == 0 445 && (qcmd->bcmd != 'E' 446 || (qdaemon->ifeatures & FEATURE_EXEC) == 0)) 447 absize[0] = '\0'; 448 else if ((qdaemon->ifeatures & FEATURE_V103) == 0) 449 sprintf (absize, "0x%lx", (unsigned long) qinfo->cbytes); 450 else 451 sprintf (absize, "%ld", qinfo->cbytes); 452 453 zsend = zbufalc (strlen (qcmd->zfrom) + strlen (qcmd->zto) 454 + strlen (qcmd->zuser) + strlen (qcmd->zoptions) 455 + strlen (qcmd->ztemp) + strlen (znotify) 456 + strlen (absize) 457 + (qcmd->zcmd != NULL ? strlen (qcmd->zcmd) : 0) 458 + 50); 459 460 /* If this an execution request and the other side supports 461 execution requests, we send an E command. Otherwise we send an S 462 command. The case of an execution request when we are sending 463 the fake execution file is handled just like an S request at this 464 point. */ 465 if (qcmd->bcmd == 'E' 466 && (qdaemon->ifeatures & FEATURE_EXEC) != 0) 467 { 468 /* Send the string 469 E zfrom zto zuser zoptions ztemp imode znotify size zcmd 470 to the remote system. We put a '-' in front of the (possibly 471 empty) options and a '0' in front of the mode. */ 472 sprintf (zsend, "E %s %s %s -%s %s 0%o %s %s %s", qcmd->zfrom, 473 qcmd->zto, qcmd->zuser, qcmd->zoptions, 474 qcmd->ztemp, qcmd->imode, znotify, absize, 475 qcmd->zcmd); 476 } 477 else 478 { 479 const char *zoptions, *zdummy; 480 481 /* Send the string 482 S zfrom zto zuser zoptions ztemp imode znotify 483 to the remote system. We put a '-' in front of the (possibly 484 empty) options and a '0' in front of the mode. If size 485 negotiation is supported, we also send the size; in this case 486 if znotify is empty we must send it as "". If this is really 487 an execution request, we have to simplify the options string 488 to remove the various execution options which may confuse the 489 remote system. SVR4 expects a string "dummy" between the 490 notify string and the size; I don't know why. */ 491 if (qcmd->bcmd != 'E') 492 zoptions = qcmd->zoptions; 493 else if (strchr (qcmd->zoptions, 'C') != NULL) 494 { 495 /* This should set zoptions to "C", but at least one UUCP 496 program gets confused by it. That means that it will 497 fail in certain cases, but I suppose we might as well 498 kowtow to compatibility. This shouldn't matter to any 499 other program, I hope. */ 500 zoptions = ""; 501 } 502 else 503 zoptions = "c"; 504 505 if ((qdaemon->ifeatures & FEATURE_SVR4) != 0) 506 zdummy = " dummy "; 507 else 508 zdummy = " "; 509 510 sprintf (zsend, "S %s %s %s -%s %s 0%o %s%s%s", qcmd->zfrom, 511 qcmd->zto, qcmd->zuser, zoptions, 512 qcmd->ztemp, qcmd->imode, znotify, zdummy, 513 absize); 514 } 515 516 fret = (*qdaemon->qproto->pfsendcmd) (qdaemon, zsend, qtrans->ilocal, 517 qtrans->iremote); 518 ubuffree (zsend); 519 520 if (fquote) 521 ufree_quoted_cmd (&squoted); 522 523 /* If fret is FALSE, we should free qtrans here, but see the comment 524 at the end of flocal_rec_send_request. */ 525 526 return fret; 527} 528 529/* This is called when a reply is received for the send request. As 530 described at length above, if the protocol supports multiple 531 channels we may be in the middle of sending the file, or we may 532 even finished sending the file. */ 533 534static boolean 535flocal_send_await_reply (qtrans, qdaemon, zdata, cdata) 536 struct stransfer *qtrans; 537 struct sdaemon *qdaemon; 538 const char *zdata; 539 size_t cdata ATTRIBUTE_UNUSED; 540{ 541 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 542 char bcmd; 543 544 if (qtrans->s.bcmd == 'E' 545 && (qdaemon->ifeatures & FEATURE_EXEC) != 0) 546 bcmd = 'E'; 547 else 548 bcmd = 'S'; 549 if (zdata[0] != bcmd 550 || (zdata[1] != 'Y' && zdata[1] != 'N')) 551 { 552 ulog (LOG_ERROR, "%s: Bad response to %c request: \"%s\"", 553 qtrans->s.zfrom, bcmd, zdata); 554 usfree_send (qtrans); 555 return FALSE; 556 } 557 558 if (zdata[1] == 'N') 559 { 560 const char *zerr; 561 boolean fnever; 562 563 fnever = TRUE; 564 if (zdata[2] == '2') 565 zerr = "permission denied by remote"; 566 else if (zdata[2] == '4') 567 { 568 zerr = "remote cannot create work files"; 569 fnever = FALSE; 570 } 571 else if (zdata[2] == '6') 572 { 573 zerr = "too large for remote now"; 574 fnever = FALSE; 575 } 576 else if (zdata[2] == '7') 577 { 578 /* The file is too large to ever send. */ 579 zerr = "too large for remote"; 580 } 581 else if (zdata[2] == '8') 582 { 583 /* The file was already received by the remote system. This 584 is not an error, it just means that the ack from the 585 remote was lost in the previous conversation, and there 586 is no need to resend the file. */ 587 zerr = NULL; 588 } 589 else if (zdata[2] == '9') 590 { 591 /* Remote has run out of channels. */ 592 zerr = "too many channels for remote"; 593 fnever = FALSE; 594 595 /* Drop one channel; using exactly one channel causes 596 slightly different behahaviour in a few places, so don't 597 decrement to one. */ 598 if (qdaemon->cchans > 2) 599 --qdaemon->cchans; 600 } 601 else 602 zerr = "unknown reason"; 603 604 if (! fnever 605 || (qtrans->s.bcmd == 'E' 606 && (qdaemon->ifeatures & FEATURE_EXEC) == 0 607 && qinfo->zexec == NULL)) 608 { 609 if (qtrans->s.bcmd == 'E') 610 ulog (LOG_ERROR, "%s (execution of \"%s\"): %s", 611 qtrans->s.zfrom, qtrans->s.zcmd, zerr); 612 else 613 ulog (LOG_ERROR, "%s: %s", qtrans->s.zfrom, zerr); 614 } 615 else 616 { 617 if (! flocal_send_fail (&qtrans->s, qdaemon, zerr)) 618 return FALSE; 619 } 620 621 /* If the protocol does not support multiple channels, we can 622 simply remove the transaction. Otherwise we must make sure 623 the remote side knows that we have finished sending the file 624 data. If we have already sent the entire file, there will be 625 no confusion. */ 626 if (qdaemon->cchans == 1 || qinfo->fsent) 627 { 628 /* If we are breaking a 'E' command into two 'S' commands, 629 and that was for the first 'S' command, we still have to 630 send the second one. */ 631 if (fnever 632 && qtrans->s.bcmd == 'E' 633 && (qdaemon->ifeatures & FEATURE_EXEC) == 0 634 && qinfo->zexec == NULL) 635 return fsend_exec_file_init (qtrans, qdaemon); 636 637 usfree_send (qtrans); 638 return TRUE; 639 } 640 else 641 { 642 /* Seek to the end of the file so that the next read will 643 send end of file. We have to be careful here, because we 644 may not have opened the file yet, or we may have actually 645 already sent end of file--we could be being called 646 because of data received while the end of file block was 647 sent. */ 648 if (qtrans->fsendfile && ! ffileseekend (qtrans->e)) 649 { 650 ulog (LOG_ERROR, "seek to end: %s", strerror (errno)); 651 usfree_send (qtrans); 652 return FALSE; 653 } 654 qtrans->psendfn = flocal_send_cancelled; 655 qtrans->precfn = NULL; 656 657 qinfo->fnever = fnever; 658 659 return fqueue_send (qdaemon, qtrans); 660 } 661 } 662 663 /* A number following the SY or EY is the file position to start 664 sending from. If we are already sending the file, we must set 665 the position accordingly. */ 666 if (zdata[2] != '\0') 667 { 668 long cskip; 669 670 cskip = strtol ((char *) (zdata + 2), (char **) NULL, 0); 671 if (cskip > 0 && qtrans->ipos < cskip) 672 { 673 if (qtrans->fsendfile && ! qinfo->fsent) 674 { 675 if (! ffileseek (qtrans->e, cskip)) 676 { 677 ulog (LOG_ERROR, "seek: %s", strerror (errno)); 678 usfree_send (qtrans); 679 return FALSE; 680 } 681 } 682 qtrans->ipos = cskip; 683 } 684 } 685 686 /* Now queue up to send the file or to wait for the confirmation. 687 We already set psendfn at the end of flocal_send_request. If the 688 protocol supports multiple channels, we have already called 689 fqueue_send; calling it again would move the request in the 690 queue, which would make the log file a bit confusing. */ 691 qtrans->fcmd = TRUE; 692 qtrans->precfn = fsend_await_confirm; 693 if (qinfo->fsent) 694 return fqueue_receive (qdaemon, qtrans); 695 else if (qdaemon->cchans <= 1) 696 return fqueue_send (qdaemon, qtrans); 697 else 698 return TRUE; 699} 700 701/* Open the file, if any, and prepare to send it. */ 702 703static boolean 704flocal_send_open_file (qtrans, qdaemon) 705 struct stransfer *qtrans; 706 struct sdaemon *qdaemon; 707{ 708 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 709 const char *zuser; 710 711 /* If this is not a fake execution file, open it. */ 712 if (qinfo->zexec == NULL) 713 { 714 /* If there is an ! in the user name, this is a remote request 715 queued up by fremote_xcmd_init. */ 716 zuser = qtrans->s.zuser; 717 if (strchr (zuser, '!') != NULL) 718 zuser = NULL; 719 720 qtrans->e = esysdep_open_send (qdaemon->qsys, qinfo->zfile, 721 ! qinfo->fspool, zuser); 722 if (! ffileisopen (qtrans->e)) 723 { 724 (void) fmail_transfer (FALSE, qtrans->s.zuser, 725 (const char *) NULL, 726 "cannot open file", 727 qtrans->s.zfrom, (const char *) NULL, 728 qtrans->s.zto, 729 qdaemon->qsys->uuconf_zname, 730 (qinfo->flocal 731 ? zsysdep_save_temp_file (qtrans->s.pseq) 732 : (const char *) NULL)); 733 (void) fsysdep_did_work (qtrans->s.pseq); 734 usfree_send (qtrans); 735 736 /* Unfortunately, there is no way to cancel a file send 737 after we've already put it in progress. So we have to 738 return FALSE to drop the connection. */ 739 return FALSE; 740 } 741 } 742 743 /* If flocal_send_await_reply has received a reply with a file 744 position, it will have set qtrans->ipos to the position at which 745 to start. */ 746 if (qtrans->ipos > 0) 747 { 748 if (qinfo->zexec != NULL) 749 { 750 if (qtrans->ipos > qtrans->cbytes) 751 qtrans->ipos = qtrans->cbytes; 752 } 753 else 754 { 755 if (! ffileseek (qtrans->e, qtrans->ipos)) 756 { 757 ulog (LOG_ERROR, "seek: %s", strerror (errno)); 758 usfree_send (qtrans); 759 return FALSE; 760 } 761 } 762 } 763 764 /* We don't bother to log sending the execution file. */ 765 if (qinfo->zexec == NULL) 766 { 767 const char *zsend; 768 char *zalc; 769 770 if (qtrans->s.bcmd != 'E') 771 { 772 zsend = qtrans->s.zfrom; 773 zalc = NULL; 774 } 775 else 776 { 777 zalc = zbufalc (strlen (qtrans->s.zcmd) + sizeof " ()" 778 + strlen (qtrans->s.zfrom)); 779 sprintf (zalc, "%s (%s)", qtrans->s.zcmd, qtrans->s.zfrom); 780 zsend = zalc; 781 } 782 783 qtrans->zlog = zbufalc (sizeof "Sending ( bytes resume at )" 784 + strlen (zsend) + 50); 785 sprintf (qtrans->zlog, "Sending %s (%ld bytes", zsend, qinfo->cbytes); 786 if (qtrans->ipos > 0) 787 sprintf (qtrans->zlog + strlen (qtrans->zlog), " resume at %ld", 788 qtrans->ipos); 789 strcat (qtrans->zlog, ")"); 790 791 ubuffree (zalc); 792 } 793 794 if (qdaemon->qproto->pffile != NULL) 795 { 796 boolean fhandled; 797 798 if (! (*qdaemon->qproto->pffile) (qdaemon, qtrans, TRUE, TRUE, 799 qinfo->cbytes - qtrans->ipos, 800 &fhandled)) 801 { 802 usfree_send (qtrans); 803 return FALSE; 804 } 805 806 if (fhandled) 807 return TRUE; 808 } 809 810 if (qinfo->zexec != NULL) 811 qtrans->psendfn = fsend_exec_file; 812 else 813 { 814 qtrans->fsendfile = TRUE; 815 qtrans->psendfn = fsend_file_end; 816 } 817 818 return fqueue_send (qdaemon, qtrans); 819} 820 821/* Cancel a file send. This is only called for a protocol which 822 supports multiple channels. It is needed so that both systems 823 agree as to when a channel is no longer needed. */ 824 825static boolean 826flocal_send_cancelled (qtrans, qdaemon) 827 struct stransfer *qtrans; 828 struct sdaemon *qdaemon; 829{ 830 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 831 832 /* If we are breaking a 'E' command into two 'S' commands, and that 833 was for the first 'S' command, and the first 'S' command will 834 never be sent, we still have to send the second one. */ 835 if (qinfo->fnever 836 && qtrans->s.bcmd == 'E' 837 && (qdaemon->ifeatures & FEATURE_EXEC) == 0 838 && qinfo->zexec == NULL) 839 return fsend_exec_file_init (qtrans, qdaemon); 840 841 usfree_send (qtrans); 842 return TRUE; 843} 844 845/* A remote request to receive a file (meaning that we have to send a 846 file). The sequence of functions calls is as follows: 847 848 fremote_rec_file_init (open file) --> fqueue_remote 849 fremote_rec_reply (send RY, call pffile) --> fqueue_send 850 send file 851 fsend_file_end (calls pffile) --> fqueue_receive 852 fsend_await_confirm (waits for CY) 853 */ 854 855boolean 856fremote_rec_file_init (qdaemon, qcmd, iremote) 857 struct sdaemon *qdaemon; 858 struct scmd *qcmd; 859 int iremote; 860{ 861 const struct uuconf_system *qsys; 862 char *zfile; 863 boolean fbadname; 864 long cbytes; 865 unsigned int imode; 866 openfile_t e; 867 struct ssendinfo *qinfo; 868 struct stransfer *qtrans; 869 870 qsys = qdaemon->qsys; 871 872 if (! qsys->uuconf_fsend_request) 873 { 874 ulog (LOG_ERROR, "%s: not permitted to send files to remote", 875 qcmd->zfrom); 876 return fremote_rec_fail (qdaemon, FAILURE_PERM, iremote); 877 } 878 879 if (fspool_file (qcmd->zfrom)) 880 { 881 ulog (LOG_ERROR, "%s: not permitted to send", qcmd->zfrom); 882 return fremote_rec_fail (qdaemon, FAILURE_PERM, iremote); 883 } 884 885 zfile = zsysdep_local_file (qcmd->zfrom, qsys->uuconf_zpubdir, &fbadname); 886 if (zfile == NULL && fbadname) 887 { 888 ulog (LOG_ERROR, "%s: bad local file name", qcmd->zfrom); 889 return fremote_rec_fail (qdaemon, FAILURE_PERM, iremote); 890 } 891 if (zfile != NULL) 892 { 893 char *zbased; 894 895 zbased = zsysdep_add_base (zfile, qcmd->zto); 896 ubuffree (zfile); 897 zfile = zbased; 898 } 899 if (zfile == NULL) 900 return fremote_rec_fail (qdaemon, FAILURE_PERM, iremote); 901 902 if (! fin_directory_list (zfile, qsys->uuconf_pzremote_send, 903 qsys->uuconf_zpubdir, TRUE, TRUE, 904 (const char *) NULL)) 905 { 906 ulog (LOG_ERROR, "%s: not permitted to send", zfile); 907 ubuffree (zfile); 908 return fremote_rec_fail (qdaemon, FAILURE_PERM, iremote); 909 } 910 911 /* If the file is larger than the amount of space the other side 912 reported, we can't send it. Should we adjust this check based on 913 the restart position? */ 914 cbytes = csysdep_size (zfile); 915 if (cbytes != -1 916 && ((qcmd->cbytes != -1 && qcmd->cbytes < cbytes) 917 || (qdaemon->cremote_size != -1 918 && qdaemon->cremote_size < cbytes) 919 || (qdaemon->cmax_receive != -1 920 && qdaemon->cmax_receive < cbytes))) 921 { 922 ulog (LOG_ERROR, "%s: too large to send", zfile); 923 ubuffree (zfile); 924 return fremote_rec_fail (qdaemon, FAILURE_SIZE, iremote); 925 } 926 927 imode = ixsysdep_file_mode (zfile); 928 929 e = esysdep_open_send (qsys, zfile, TRUE, (const char *) NULL); 930 if (! ffileisopen (e)) 931 { 932 ubuffree (zfile); 933 return fremote_rec_fail (qdaemon, FAILURE_OPEN, iremote); 934 } 935 936 /* If the remote requested that the file send start from a 937 particular position, arrange to do so. */ 938 if (qcmd->ipos > 0) 939 { 940 if (! ffileseek (e, qcmd->ipos)) 941 { 942 ulog (LOG_ERROR, "seek: %s", strerror (errno)); 943 ubuffree (zfile); 944 return FALSE; 945 } 946 } 947 948 qinfo = (struct ssendinfo *) xmalloc (sizeof (struct ssendinfo)); 949 qinfo->zmail = NULL; 950 qinfo->zfile = zfile; 951 qinfo->cbytes = cbytes; 952 qinfo->flocal = FALSE; 953 qinfo->fspool = FALSE; 954 qinfo->fsent = FALSE; 955 qinfo->zexec = NULL; 956 qinfo->zconfirm = NULL; 957 958 qtrans = qtransalc (qcmd); 959 qtrans->psendfn = fremote_rec_reply; 960 qtrans->iremote = iremote; 961 qtrans->pinfo = (pointer) qinfo; 962 qtrans->e = e; 963 qtrans->ipos = qcmd->ipos; 964 qtrans->s.imode = imode; 965 966 return fqueue_remote (qdaemon, qtrans); 967} 968 969/* Reply to a receive request from the remote system, and prepare to 970 start sending the file. */ 971 972static boolean 973fremote_rec_reply (qtrans, qdaemon) 974 struct stransfer *qtrans; 975 struct sdaemon *qdaemon; 976{ 977 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 978 char absend[50]; 979 980 qtrans->fsendfile = TRUE; 981 qtrans->psendfn = fsend_file_end; 982 qtrans->fcmd = TRUE; 983 qtrans->precfn = fsend_await_confirm; 984 985 if (! fqueue_send (qdaemon, qtrans)) 986 return FALSE; 987 988 qtrans->zlog = zbufalc (sizeof "Sending ( bytes) " 989 + strlen (qtrans->s.zfrom) + 25); 990 sprintf (qtrans->zlog, "Sending %s (%ld bytes)", qtrans->s.zfrom, 991 qinfo->cbytes); 992 993 /* We send the file size because SVR4 UUCP does. We don't look for 994 it. We send a trailing M if we want to request a hangup. We 995 send it both after the mode and at the end of the entire string; 996 I don't know where programs look for it. */ 997 if (qdaemon->frequest_hangup) 998 DEBUG_MESSAGE0 (DEBUG_UUCP_PROTO, 999 "fremote_rec_reply: Requesting remote to transfer control"); 1000 sprintf (absend, "RY 0%o%s 0x%lx%s", qtrans->s.imode, 1001 qdaemon->frequest_hangup ? "M" : "", 1002 (unsigned long) qinfo->cbytes, 1003 qdaemon->frequest_hangup ? "M" : ""); 1004 if (! (*qdaemon->qproto->pfsendcmd) (qdaemon, absend, qtrans->ilocal, 1005 qtrans->iremote)) 1006 { 1007 (void) ffileclose (qtrans->e); 1008 qtrans->e = EFILECLOSED; 1009 /* Should probably free qtrans here, but see the comment at the 1010 end of flocal_rec_send_request. */ 1011 return FALSE; 1012 } 1013 1014 if (qdaemon->qproto->pffile != NULL) 1015 { 1016 boolean fhandled; 1017 1018 if (! (*qdaemon->qproto->pffile) (qdaemon, qtrans, TRUE, TRUE, 1019 qinfo->cbytes, &fhandled)) 1020 { 1021 usfree_send (qtrans); 1022 return FALSE; 1023 } 1024 } 1025 1026 return TRUE; 1027} 1028 1029/* If we can't send a file as requested by the remote system, queue up 1030 a failure reply which will be sent when possible. */ 1031 1032static boolean 1033fremote_rec_fail (qdaemon, twhy, iremote) 1034 struct sdaemon *qdaemon; 1035 enum tfailure twhy; 1036 int iremote; 1037{ 1038 enum tfailure *ptinfo; 1039 struct stransfer *qtrans; 1040 1041 ptinfo = (enum tfailure *) xmalloc (sizeof (enum tfailure)); 1042 *ptinfo = twhy; 1043 1044 qtrans = qtransalc ((struct scmd *) NULL); 1045 qtrans->psendfn = fremote_rec_fail_send; 1046 qtrans->iremote = iremote; 1047 qtrans->pinfo = (pointer) ptinfo; 1048 1049 return fqueue_remote (qdaemon, qtrans); 1050} 1051 1052/* Send a failure string for a receive command to the remote system; 1053 this is called when we are ready to reply to the command. */ 1054 1055static boolean 1056fremote_rec_fail_send (qtrans, qdaemon) 1057 struct stransfer *qtrans; 1058 struct sdaemon *qdaemon; 1059{ 1060 enum tfailure *ptinfo = (enum tfailure *) qtrans->pinfo; 1061 const char *z; 1062 int ilocal, iremote; 1063 1064 switch (*ptinfo) 1065 { 1066 case FAILURE_PERM: 1067 case FAILURE_OPEN: 1068 z = "RN2"; 1069 break; 1070 case FAILURE_SIZE: 1071 z = "RN6"; 1072 break; 1073 default: 1074 z = "RN"; 1075 break; 1076 } 1077 1078 ilocal = qtrans->ilocal; 1079 iremote = qtrans->iremote; 1080 1081 xfree (qtrans->pinfo); 1082 utransfree (qtrans); 1083 1084 return (*qdaemon->qproto->pfsendcmd) (qdaemon, z, ilocal, iremote); 1085} 1086 1087/* This is called when the main loop has finished sending a file. It 1088 prepares to wait for a response from the remote system. Note that 1089 if this is a local request and the protocol supports multiple 1090 channels, we may not even have received a confirmation of the send 1091 request. */ 1092 1093static boolean 1094fsend_file_end (qtrans, qdaemon) 1095 struct stransfer *qtrans; 1096 struct sdaemon *qdaemon; 1097{ 1098 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 1099 1100 if (qdaemon->qproto->pffile != NULL) 1101 { 1102 boolean fhandled; 1103 1104 if (! (*qdaemon->qproto->pffile) (qdaemon, qtrans, FALSE, TRUE, 1105 (long) -1, &fhandled)) 1106 { 1107 usfree_send (qtrans); 1108 return FALSE; 1109 } 1110 1111 if (fhandled) 1112 return TRUE; 1113 } 1114 1115 qinfo->fsent = TRUE; 1116 1117 /* If zconfirm is set, then we have already received the 1118 confirmation, and should call fsend_await_confirm directly. */ 1119 if (qinfo->zconfirm != NULL) 1120 return fsend_await_confirm (qtrans, qdaemon, qinfo->zconfirm, 1121 strlen (qinfo->zconfirm) + 1); 1122 1123 /* qtrans->precfn should have been set by a previous function. */ 1124 return fqueue_receive (qdaemon, qtrans); 1125} 1126 1127/* Handle the confirmation string received after sending a file. */ 1128 1129/*ARGSUSED*/ 1130static boolean 1131fsend_await_confirm (qtrans, qdaemon, zdata, cdata) 1132 struct stransfer *qtrans; 1133 struct sdaemon *qdaemon; 1134 const char *zdata; 1135 size_t cdata ATTRIBUTE_UNUSED; 1136{ 1137 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 1138 boolean fnever; 1139 const char *zerr; 1140 1141 /* If fsent is FALSE, it means that we have received the 1142 confirmation before fsend_file_end got called. To avoid 1143 confusion, we save away the confirmation message, and let 1144 fsend_file_end call us directly. If we did not do this, we would 1145 have to fix a thorny race condition in floop, which wants to 1146 refer to the qtrans structure after sending the end of the file. */ 1147 if (! qinfo->fsent) 1148 { 1149 qinfo->zconfirm = zbufcpy (zdata); 1150 return TRUE; 1151 } 1152 1153 if (qinfo->zexec == NULL) 1154 { 1155 (void) ffileclose (qtrans->e); 1156 qtrans->e = EFILECLOSED; 1157 } 1158 1159 fnever = FALSE; 1160 if (zdata[0] != 'C' 1161 || (zdata[1] != 'Y' && zdata[1] != 'N')) 1162 { 1163 zerr = "bad confirmation from remote"; 1164 ulog (LOG_ERROR, "%s: %s \"%s\"", qtrans->s.zfrom, zerr, zdata); 1165 } 1166 else if (zdata[1] == 'N') 1167 { 1168 fnever = TRUE; 1169 if (zdata[2] == '5') 1170 { 1171 zerr = "file could not be stored in final location"; 1172 ulog (LOG_ERROR, "%s: %s", qtrans->s.zfrom, zerr); 1173 } 1174 else 1175 { 1176 zerr = "file send failed for unknown reason"; 1177 ulog (LOG_ERROR, "%s: %s \"%s\"", qtrans->s.zfrom, zerr, zdata); 1178 } 1179 } 1180 else 1181 { 1182 zerr = NULL; 1183 1184 /* If we receive CYM, it means that the other side wants us to 1185 hang up so that they can send us something. The 1186 fhangup_requested field is checked in the main loop. */ 1187 if (zdata[2] == 'M' && qdaemon->fmaster) 1188 { 1189 DEBUG_MESSAGE0 (DEBUG_UUCP_PROTO, 1190 "fsend_await_confirm: Remote has requested transfer of control"); 1191 qdaemon->fhangup_requested = TRUE; 1192 } 1193 } 1194 1195 ustats (zerr == NULL, qtrans->s.zuser, qdaemon->qsys->uuconf_zname, 1196 TRUE, qtrans->cbytes, qtrans->isecs, qtrans->imicros, 1197 qdaemon->fcaller); 1198 qdaemon->csent += qtrans->cbytes; 1199 1200 if (zerr == NULL) 1201 { 1202 /* If this is an execution request, and the remote system 1203 doesn't support execution requests, we have to set up the 1204 fake execution file and loop around again. */ 1205 if (qtrans->s.bcmd == 'E' 1206 && (qdaemon->ifeatures & FEATURE_EXEC) == 0 1207 && qinfo->zexec == NULL) 1208 return fsend_exec_file_init (qtrans, qdaemon); 1209 1210 /* Send mail about the transfer if requested. */ 1211 if (qinfo->zmail != NULL && *qinfo->zmail != '\0') 1212 (void) fmail_transfer (TRUE, qtrans->s.zuser, qinfo->zmail, 1213 (const char *) NULL, 1214 qtrans->s.zfrom, (const char *) NULL, 1215 qtrans->s.zto, qdaemon->qsys->uuconf_zname, 1216 (const char *) NULL); 1217 1218 if (qtrans->s.pseq != NULL) 1219 (void) fsysdep_did_work (qtrans->s.pseq); 1220 } 1221 else 1222 { 1223 /* If the file send failed, we only try to save the file and 1224 send mail if it was requested locally and it will never 1225 succeed. We send mail to qinfo->zmail if set, otherwise to 1226 qtrans->s.zuser. I hope this is reasonable. */ 1227 if (fnever && qinfo->flocal) 1228 { 1229 (void) fmail_transfer (FALSE, qtrans->s.zuser, qinfo->zmail, 1230 zerr, qtrans->s.zfrom, (const char *) NULL, 1231 qtrans->s.zto, qdaemon->qsys->uuconf_zname, 1232 zsysdep_save_temp_file (qtrans->s.pseq)); 1233 (void) fsysdep_did_work (qtrans->s.pseq); 1234 } 1235 } 1236 1237 usfree_send (qtrans); 1238 1239 return TRUE; 1240} 1241 1242/* Prepare to send an execution file to a system which does not 1243 support execution requests. We build the execution file in memory, 1244 and then call flocal_send_request as though we were sending a real 1245 file. Instead of sending a file, the code in flocal_send_open_file 1246 will arrange to call fsend_exec_file which will send data out of 1247 the buffer we have created. */ 1248 1249static boolean 1250fsend_exec_file_init (qtrans, qdaemon) 1251 struct stransfer *qtrans; 1252 struct sdaemon *qdaemon; 1253{ 1254 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 1255 char *zxqtfile; 1256 char abtname[CFILE_NAME_LEN]; 1257 char abxname[CFILE_NAME_LEN]; 1258 char *z; 1259 size_t calc, clen; 1260 boolean fquote; 1261 1262 z = NULL; 1263 calc = 0; 1264 clen = 0; 1265 1266 fquote = fcmd_needs_quotes (&qtrans->s); 1267 1268 if (fquote) 1269 usadd_exec_line (&z, &calc, &clen, 'Q', "", "", TRUE); 1270 1271 usadd_exec_line (&z, &calc, &clen, 'U', qtrans->s.zuser, 1272 qdaemon->zlocalname, fquote); 1273 usadd_exec_line (&z, &calc, &clen, 'F', qtrans->s.zto, "", fquote); 1274 usadd_exec_line (&z, &calc, &clen, 'I', qtrans->s.zto, "", fquote); 1275 if (strchr (qtrans->s.zoptions, 'N') != NULL) 1276 usadd_exec_line (&z, &calc, &clen, 'N', "", "", fquote); 1277 if (strchr (qtrans->s.zoptions, 'Z') != NULL) 1278 usadd_exec_line (&z, &calc, &clen, 'Z', "", "", fquote); 1279 if (strchr (qtrans->s.zoptions, 'R') != NULL) 1280 usadd_exec_line (&z, &calc, &clen, 'R', qtrans->s.znotify, "", fquote); 1281 if (strchr (qtrans->s.zoptions, 'e') != NULL) 1282 usadd_exec_line (&z, &calc, &clen, 'e', "", "", fquote); 1283 1284 /* For the command, we only quote backslashes. If there is anything 1285 which requires fancier handling, uux will not have generated an 1286 'E' command. */ 1287 if (! fquote) 1288 usadd_exec_line (&z, &calc, &clen, 'C', qtrans->s.zcmd, "", FALSE); 1289 else 1290 { 1291 char *zquoted; 1292 1293 zquoted = zquote_cmd_string (qtrans->s.zcmd, TRUE); 1294 usadd_exec_line (&z, &calc, &clen, 'C', zquoted, "", FALSE); 1295 ubuffree (zquoted); 1296 } 1297 1298 qinfo->zexec = z; 1299 qinfo->cbytes = clen; 1300 1301 zxqtfile = zsysdep_data_file_name (qdaemon->qsys, qdaemon->zlocalname, 1302 BDEFAULT_UUX_GRADE, TRUE, abtname, 1303 (char *) NULL, abxname); 1304 if (zxqtfile == NULL) 1305 { 1306 usfree_send (qtrans); 1307 return FALSE; 1308 } 1309 ubuffree (zxqtfile); 1310 1311 ubuffree ((char *) qtrans->s.zfrom); 1312 qtrans->s.zfrom = zbufcpy (abtname); 1313 ubuffree ((char *) qtrans->s.zto); 1314 qtrans->s.zto = zbufcpy (abxname); 1315 ubuffree ((char *) qtrans->s.zoptions); 1316 qtrans->s.zoptions = zbufcpy ("C"); 1317 ubuffree ((char *) qtrans->s.ztemp); 1318 qtrans->s.ztemp = zbufcpy (abtname); 1319 1320 qtrans->psendfn = flocal_send_request; 1321 qtrans->precfn = NULL; 1322 qtrans->ipos = 0; 1323 qtrans->cbytes = 0; 1324 qtrans->isecs = 0; 1325 qtrans->imicros = 0; 1326 qinfo->fsent = FALSE; 1327 ubuffree (qinfo->zconfirm); 1328 qinfo->zconfirm = NULL; 1329 1330 return fqueue_send (qdaemon, qtrans); 1331} 1332 1333/* Add a line to the fake execution file. */ 1334 1335static void 1336usadd_exec_line (pz, pcalc, pclen, bcmd, z1, z2, fquote) 1337 char **pz; 1338 size_t *pcalc; 1339 size_t *pclen; 1340 int bcmd; 1341 const char *z1; 1342 const char *z2; 1343 boolean fquote; 1344{ 1345 char *z1q; 1346 char *z2q; 1347 size_t c1, c2; 1348 char *znew; 1349 1350 z1q = NULL; 1351 z2q = NULL; 1352 if (fquote) 1353 { 1354 if (*z1 != '\0') 1355 { 1356 z1q = zquote_cmd_string (z1, FALSE); 1357 z1 = z1q; 1358 } 1359 1360 if (*z2 != '\0') 1361 { 1362 z2q = zquote_cmd_string (z2, FALSE); 1363 z2 = z2q; 1364 } 1365 } 1366 1367 c1 = strlen (z1); 1368 c2 = strlen (z2); 1369 1370 if (*pclen + c1 + c2 + 4 >= *pcalc) 1371 { 1372 *pcalc += c1 + c2 + 100; 1373 znew = zbufalc (*pcalc); 1374 if (*pclen > 0) 1375 { 1376 memcpy (znew, *pz, *pclen); 1377 ubuffree (*pz); 1378 } 1379 *pz = znew; 1380 } 1381 1382 znew = *pz + *pclen; 1383 *znew++ = bcmd; 1384 if (*z1 != '\0') 1385 { 1386 *znew++ = ' '; 1387 memcpy (znew, z1, c1); 1388 znew += c1; 1389 if (*z2 != '\0') 1390 { 1391 *znew++ = ' '; 1392 memcpy (znew, z2, c2); 1393 znew += c2; 1394 } 1395 } 1396 1397 if (fquote) 1398 { 1399 ubuffree (z1q); 1400 ubuffree (z2q); 1401 } 1402 1403 /* In some bizarre non-Unix case we might have to worry about the 1404 newline here. We don't know how a newline is normally written 1405 out to a file, but whatever is written to a file is what we will 1406 normally transfer. If that is not simply \n then this fake 1407 execution file will not look like other execution files. */ 1408 *znew++ = '\n'; 1409 1410 *pclen = znew - *pz; 1411} 1412 1413/* This routine is called to send the contents of the fake execution 1414 file. Normally file data is sent by the floop routine in trans.c, 1415 but since we don't have an actual file we must do it here. This 1416 routine sends the complete buffer, followed by a zero length 1417 packet, and then calls fsend_file_end. */ 1418 1419static boolean 1420fsend_exec_file (qtrans, qdaemon) 1421 struct stransfer *qtrans; 1422 struct sdaemon *qdaemon; 1423{ 1424 struct ssendinfo *qinfo = (struct ssendinfo *) qtrans->pinfo; 1425 char *zdata; 1426 size_t cdata; 1427 size_t csend; 1428 1429 zdata = (*qdaemon->qproto->pzgetspace) (qdaemon, &cdata); 1430 if (zdata == NULL) 1431 { 1432 usfree_send (qtrans); 1433 return FALSE; 1434 } 1435 1436 csend = qinfo->cbytes - qtrans->ipos; 1437 if (csend > cdata) 1438 csend = cdata; 1439 1440 memcpy (zdata, qinfo->zexec + qtrans->ipos, csend); 1441 1442 if (! (*qdaemon->qproto->pfsenddata) (qdaemon, zdata, csend, 1443 qtrans->ilocal, qtrans->iremote, 1444 qtrans->ipos)) 1445 { 1446 usfree_send (qtrans); 1447 return FALSE; 1448 } 1449 1450 qtrans->cbytes += csend; 1451 qtrans->ipos += csend; 1452 1453 if (csend == 0) 1454 return fsend_file_end (qtrans, qdaemon); 1455 1456 /* Leave the job on the send queue. */ 1457 1458 return TRUE; 1459} 1460