1 /* $NetBSD: util.c,v 1.95 2000/05/01 10:35:19 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 12 * NASA Ames Research Center. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the NetBSD 25 * Foundation, Inc. and its contributors. 26 * 4. Neither the name of The NetBSD Foundation nor the names of its 27 * contributors may be used to endorse or promote products derived 28 * from this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Copyright (c) 1985, 1989, 1993, 1994 45 * The Regents of the University of California. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. All advertising materials mentioning features or use of this software 56 * must display the following acknowledgement: 57 * This product includes software developed by the University of 58 * California, Berkeley and its contributors. 59 * 4. Neither the name of the University nor the names of its contributors 60 * may be used to endorse or promote products derived from this software 61 * without specific prior written permission. 62 * 63 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 64 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 65 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 66 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 67 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 68 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 69 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 70 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 71 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 72 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 73 * SUCH DAMAGE. 74 */ 75 76 #include <sys/cdefs.h> 77 #ifndef lint 78 __RCSID("$NetBSD: util.c,v 1.95 2000/05/01 10:35:19 lukem Exp $"); 79 #endif /* not lint */ 80 81 /* 82 * FTP User Program -- Misc support routines 83 */ 84 #include <sys/types.h> 85 #include <sys/socket.h> 86 #include <sys/ioctl.h> 87 #include <sys/time.h> 88 #include <netinet/in.h> 89 #include <arpa/ftp.h> 90 91 #include <ctype.h> 92 #include <err.h> 93 #include <errno.h> 94 #include <fcntl.h> 95 #include <glob.h> 96 #include <signal.h> 97 #include <limits.h> 98 #include <pwd.h> 99 #include <stdio.h> 100 #include <stdlib.h> 101 #include <string.h> 102 #include <termios.h> 103 #include <time.h> 104 #include <tzfile.h> 105 #include <unistd.h> 106 #ifdef INET6 107 #include <netdb.h> 108 #endif 109 110 #include "ftp_var.h" 111 112 /* 113 * Connect to peer server and 114 * auto-login, if possible. 115 */ 116 void 117 setpeer(int argc, char *argv[]) 118 { 119 char *host; 120 char *port; 121 122 if (argc == 0) 123 goto usage; 124 if (connected) { 125 fprintf(ttyout, "Already connected to %s, use close first.\n", 126 hostname); 127 code = -1; 128 return; 129 } 130 if (argc < 2) 131 (void)another(&argc, &argv, "to"); 132 if (argc < 2 || argc > 3) { 133 usage: 134 fprintf(ttyout, "usage: %s host-name [port]\n", argv[0]); 135 code = -1; 136 return; 137 } 138 if (gatemode) 139 port = gateport; 140 else 141 port = ftpport; 142 if (argc > 2) 143 port = argv[2]; 144 145 if (gatemode) { 146 if (gateserver == NULL || *gateserver == '\0') 147 errx(1, "gateserver not defined (shouldn't happen)"); 148 host = hookup(gateserver, port); 149 } else 150 host = hookup(argv[1], port); 151 152 if (host) { 153 int overbose; 154 155 if (gatemode && verbose) { 156 fprintf(ttyout, 157 "Connecting via pass-through server %s\n", 158 gateserver); 159 } 160 161 connected = 1; 162 /* 163 * Set up defaults for FTP. 164 */ 165 (void)strlcpy(typename, "ascii", sizeof(typename)); 166 type = TYPE_A; 167 curtype = TYPE_A; 168 (void)strlcpy(formname, "non-print", sizeof(formname)); 169 form = FORM_N; 170 (void)strlcpy(modename, "stream", sizeof(modename)); 171 mode = MODE_S; 172 (void)strlcpy(structname, "file", sizeof(structname)); 173 stru = STRU_F; 174 (void)strlcpy(bytename, "8", sizeof(bytename)); 175 bytesize = 8; 176 if (autologin) 177 (void)ftp_login(argv[1], NULL, NULL); 178 179 overbose = verbose; 180 if (debug == 0) 181 verbose = -1; 182 if (command("SYST") == COMPLETE && overbose) { 183 char *cp, c; 184 c = 0; 185 cp = strchr(reply_string + 4, ' '); 186 if (cp == NULL) 187 cp = strchr(reply_string + 4, '\r'); 188 if (cp) { 189 if (cp[-1] == '.') 190 cp--; 191 c = *cp; 192 *cp = '\0'; 193 } 194 195 fprintf(ttyout, "Remote system type is %s.\n", 196 reply_string + 4); 197 if (cp) 198 *cp = c; 199 } 200 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) { 201 if (proxy) 202 unix_proxy = 1; 203 else 204 unix_server = 1; 205 /* 206 * Set type to 0 (not specified by user), 207 * meaning binary by default, but don't bother 208 * telling server. We can use binary 209 * for text files unless changed by the user. 210 */ 211 type = 0; 212 (void)strlcpy(typename, "binary", sizeof(typename)); 213 if (overbose) 214 fprintf(ttyout, 215 "Using %s mode to transfer files.\n", 216 typename); 217 } else { 218 if (proxy) 219 unix_proxy = 0; 220 else 221 unix_server = 0; 222 if (overbose && 223 !strncmp(reply_string, "215 TOPS20", 10)) 224 fputs( 225 "Remember to set tenex mode when transferring binary files from this machine.\n", 226 ttyout); 227 } 228 verbose = overbose; 229 } 230 } 231 232 /* 233 * Reset the various variables that indicate connection state back to 234 * disconnected settings. 235 * The caller is responsible for issuing any commands to the remote server 236 * to perform a clean shutdown before this is invoked. 237 */ 238 void 239 cleanuppeer() 240 { 241 242 if (cout) 243 (void)fclose(cout); 244 cout = NULL; 245 connected = 0; 246 /* 247 * determine if anonftp was specifically set with -a 248 * (1), or implicitly set by auto_fetch() (2). in the 249 * latter case, disable after the current xfer 250 */ 251 if (anonftp == 2) 252 anonftp = 0; 253 data = -1; 254 epsv4bad = 0; 255 if (username) 256 free(username); 257 username = NULL; 258 if (!proxy) 259 macnum = 0; 260 } 261 262 /* 263 * Top-level signal handler for interrupted commands. 264 */ 265 void 266 intr(int dummy) 267 { 268 269 alarmtimer(0); 270 if (fromatty) 271 write(fileno(ttyout), "\n", 1); 272 siglongjmp(toplevel, 1); 273 } 274 275 /* 276 * Signal handler for lost connections; cleanup various elements of 277 * the connection state, and call cleanuppeer() to finish it off. 278 */ 279 void 280 lostpeer(int dummy) 281 { 282 int oerrno = errno; 283 284 alarmtimer(0); 285 if (connected) { 286 if (cout != NULL) { 287 (void)shutdown(fileno(cout), 1+1); 288 (void)fclose(cout); 289 cout = NULL; 290 } 291 if (data >= 0) { 292 (void)shutdown(data, 1+1); 293 (void)close(data); 294 data = -1; 295 } 296 connected = 0; 297 } 298 pswitch(1); 299 if (connected) { 300 if (cout != NULL) { 301 (void)shutdown(fileno(cout), 1+1); 302 (void)fclose(cout); 303 cout = NULL; 304 } 305 connected = 0; 306 } 307 proxflag = 0; 308 pswitch(0); 309 cleanuppeer(); 310 errno = oerrno; 311 } 312 313 314 /* 315 * login to remote host, using given username & password if supplied 316 */ 317 int 318 ftp_login(const char *host, const char *user, const char *pass) 319 { 320 char tmp[80]; 321 const char *acct; 322 struct passwd *pw; 323 int n, aflag, rval, freeuser, freepass, freeacct; 324 325 acct = NULL; 326 aflag = rval = freeuser = freepass = freeacct = 0; 327 328 if (debug) 329 fprintf(ttyout, "ftp_login: user `%s' pass `%s' host `%s'\n", 330 user ? user : "<null>", pass ? pass : "<null>", 331 host ? host : "<null>"); 332 333 334 /* 335 * Set up arguments for an anonymous FTP session, if necessary. 336 */ 337 if (anonftp) { 338 user = "anonymous"; /* as per RFC 1635 */ 339 pass = getoptionvalue("anonpass"); 340 } 341 342 if (user == NULL) 343 freeuser = 1; 344 if (pass == NULL) 345 freepass = 1; 346 freeacct = 1; 347 if (ruserpass(host, &user, &pass, &acct) < 0) { 348 code = -1; 349 goto cleanup_ftp_login; 350 } 351 352 while (user == NULL) { 353 const char *myname = getlogin(); 354 355 if (myname == NULL && (pw = getpwuid(getuid())) != NULL) 356 myname = pw->pw_name; 357 if (myname) 358 fprintf(ttyout, "Name (%s:%s): ", host, myname); 359 else 360 fprintf(ttyout, "Name (%s): ", host); 361 *tmp = '\0'; 362 if (fgets(tmp, sizeof(tmp) - 1, stdin) == NULL) { 363 fprintf(ttyout, "\nEOF received; login aborted.\n"); 364 clearerr(stdin); 365 code = -1; 366 goto cleanup_ftp_login; 367 } 368 tmp[strlen(tmp) - 1] = '\0'; 369 freeuser = 0; 370 if (*tmp == '\0') 371 user = myname; 372 else 373 user = tmp; 374 } 375 376 if (gatemode) { 377 char *nuser; 378 int len; 379 380 len = strlen(user) + 1 + strlen(host) + 1; 381 nuser = xmalloc(len); 382 (void)strlcpy(nuser, user, len); 383 (void)strlcat(nuser, "@", len); 384 (void)strlcat(nuser, host, len); 385 freeuser = 1; 386 user = nuser; 387 } 388 389 n = command("USER %s", user); 390 if (n == CONTINUE) { 391 if (pass == NULL) { 392 freepass = 0; 393 pass = getpass("Password:"); 394 } 395 n = command("PASS %s", pass); 396 } 397 if (n == CONTINUE) { 398 aflag++; 399 if (acct == NULL) { 400 freeacct = 0; 401 acct = getpass("Account:"); 402 } 403 if (acct[0] == '\0') { 404 warnx("Login failed."); 405 goto cleanup_ftp_login; 406 } 407 n = command("ACCT %s", acct); 408 } 409 if ((n != COMPLETE) || 410 (!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) { 411 warnx("Login failed."); 412 goto cleanup_ftp_login; 413 } 414 rval = 1; 415 username = xstrdup(user); 416 if (proxy) 417 goto cleanup_ftp_login; 418 419 connected = -1; 420 for (n = 0; n < macnum; ++n) { 421 if (!strcmp("init", macros[n].mac_name)) { 422 (void)strlcpy(line, "$init", sizeof(line)); 423 makeargv(); 424 domacro(margc, margv); 425 break; 426 } 427 } 428 updateremotepwd(); 429 430 cleanup_ftp_login: 431 if (user != NULL && freeuser) 432 free((char *)user); 433 if (pass != NULL && freepass) 434 free((char *)pass); 435 if (acct != NULL && freeacct) 436 free((char *)acct); 437 return (rval); 438 } 439 440 /* 441 * `another' gets another argument, and stores the new argc and argv. 442 * It reverts to the top level (via intr()) on EOF/error. 443 * 444 * Returns false if no new arguments have been added. 445 */ 446 int 447 another(int *pargc, char ***pargv, const char *prompt) 448 { 449 int len = strlen(line), ret; 450 451 if (len >= sizeof(line) - 3) { 452 fputs("sorry, arguments too long.\n", ttyout); 453 intr(0); 454 } 455 fprintf(ttyout, "(%s) ", prompt); 456 line[len++] = ' '; 457 if (fgets(&line[len], sizeof(line) - len, stdin) == NULL) { 458 clearerr(stdin); 459 intr(0); 460 } 461 len += strlen(&line[len]); 462 if (len > 0 && line[len - 1] == '\n') 463 line[len - 1] = '\0'; 464 makeargv(); 465 ret = margc > *pargc; 466 *pargc = margc; 467 *pargv = margv; 468 return (ret); 469 } 470 471 /* 472 * glob files given in argv[] from the remote server. 473 * if errbuf isn't NULL, store error messages there instead 474 * of writing to the screen. 475 */ 476 char * 477 remglob(char *argv[], int doswitch, char **errbuf) 478 { 479 char temp[MAXPATHLEN]; 480 static char buf[MAXPATHLEN]; 481 static FILE *ftemp = NULL; 482 static char **args; 483 int oldverbose, oldhash, fd, len; 484 char *cp, *mode; 485 486 if (!mflag || !connected) { 487 if (!doglob) 488 args = NULL; 489 else { 490 if (ftemp) { 491 (void)fclose(ftemp); 492 ftemp = NULL; 493 } 494 } 495 return (NULL); 496 } 497 if (!doglob) { 498 if (args == NULL) 499 args = argv; 500 if ((cp = *++args) == NULL) 501 args = NULL; 502 return (cp); 503 } 504 if (ftemp == NULL) { 505 len = strlcpy(temp, tmpdir, sizeof(temp)); 506 if (temp[len - 1] != '/') 507 (void)strlcat(temp, "/", sizeof(temp)); 508 (void)strlcat(temp, TMPFILE, sizeof(temp)); 509 if ((fd = mkstemp(temp)) < 0) { 510 warn("unable to create temporary file %s", temp); 511 return (NULL); 512 } 513 close(fd); 514 oldverbose = verbose; 515 verbose = (errbuf != NULL) ? -1 : 0; 516 oldhash = hash; 517 hash = 0; 518 if (doswitch) 519 pswitch(!proxy); 520 for (mode = "w"; *++argv != NULL; mode = "a") 521 recvrequest("NLST", temp, *argv, mode, 0, 0); 522 if ((code / 100) != COMPLETE) { 523 if (errbuf != NULL) 524 *errbuf = reply_string; 525 } 526 if (doswitch) 527 pswitch(!proxy); 528 verbose = oldverbose; 529 hash = oldhash; 530 ftemp = fopen(temp, "r"); 531 (void)unlink(temp); 532 if (ftemp == NULL) { 533 if (errbuf == NULL) 534 fputs( 535 "can't find list of remote files, oops.\n", 536 ttyout); 537 else 538 *errbuf = 539 "can't find list of remote files, oops."; 540 return (NULL); 541 } 542 } 543 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 544 (void)fclose(ftemp); 545 ftemp = NULL; 546 return (NULL); 547 } 548 if ((cp = strchr(buf, '\n')) != NULL) 549 *cp = '\0'; 550 return (buf); 551 } 552 553 /* 554 * Glob a local file name specification with the expectation of a single 555 * return value. Can't control multiple values being expanded from the 556 * expression, we return only the first. 557 * Returns NULL on error, or a pointer to a buffer containing the filename 558 * that's the caller's responsiblity to free(3) when finished with. 559 */ 560 char * 561 globulize(const char *pattern) 562 { 563 glob_t gl; 564 int flags; 565 char *p; 566 567 if (!doglob) 568 return (xstrdup(pattern)); 569 570 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 571 memset(&gl, 0, sizeof(gl)); 572 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 573 warnx("%s: not found", pattern); 574 globfree(&gl); 575 return (NULL); 576 } 577 p = xstrdup(gl.gl_pathv[0]); 578 globfree(&gl); 579 return (p); 580 } 581 582 /* 583 * determine size of remote file 584 */ 585 off_t 586 remotesize(const char *file, int noisy) 587 { 588 int overbose; 589 off_t size; 590 591 overbose = verbose; 592 size = -1; 593 if (debug == 0) 594 verbose = -1; 595 if (command("SIZE %s", file) == COMPLETE) { 596 char *cp, *ep; 597 598 cp = strchr(reply_string, ' '); 599 if (cp != NULL) { 600 cp++; 601 #ifndef NO_QUAD 602 size = strtoll(cp, &ep, 10); 603 #else 604 size = strtol(cp, &ep, 10); 605 #endif 606 if (*ep != '\0' && !isspace((unsigned char)*ep)) 607 size = -1; 608 } 609 } else if (noisy && debug == 0) { 610 fputs(reply_string, ttyout); 611 putc('\n', ttyout); 612 } 613 verbose = overbose; 614 return (size); 615 } 616 617 /* 618 * determine last modification time (in GMT) of remote file 619 */ 620 time_t 621 remotemodtime(const char *file, int noisy) 622 { 623 int overbose; 624 time_t rtime; 625 int ocode; 626 627 overbose = verbose; 628 ocode = code; 629 rtime = -1; 630 if (debug == 0) 631 verbose = -1; 632 if (command("MDTM %s", file) == COMPLETE) { 633 struct tm timebuf; 634 char *timestr, *frac; 635 int yy, mo, day, hour, min, sec; 636 637 /* 638 * time-val = 14DIGIT [ "." 1*DIGIT ] 639 * YYYYMMDDHHMMSS[.sss] 640 * mdtm-response = "213" SP time-val CRLF / error-response 641 */ 642 timestr = reply_string + 4; 643 644 /* 645 * parse fraction. 646 * XXX: ignored for now 647 */ 648 frac = strchr(timestr, '\r'); 649 if (frac != NULL) 650 *frac = '\0'; 651 frac = strchr(timestr, '.'); 652 if (frac != NULL) 653 *frac++ = '\0'; 654 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 655 /* 656 * XXX: Workaround for lame ftpd's that return 657 * `19100' instead of `2000' 658 */ 659 fprintf(ttyout, 660 "Y2K warning! Incorrect time-val `%s' received from server.\n", 661 timestr); 662 timestr++; 663 timestr[0] = '2'; 664 timestr[1] = '0'; 665 fprintf(ttyout, "Converted to `%s'\n", timestr); 666 } 667 if (strlen(timestr) != 14 || 668 sscanf(timestr, "%04d%02d%02d%02d%02d%02d", 669 &yy, &mo, &day, &hour, &min, &sec) != 6) { 670 bad_parse_time: 671 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 672 goto cleanup_parse_time; 673 } 674 memset(&timebuf, 0, sizeof(timebuf)); 675 timebuf.tm_sec = sec; 676 timebuf.tm_min = min; 677 timebuf.tm_hour = hour; 678 timebuf.tm_mday = day; 679 timebuf.tm_mon = mo - 1; 680 timebuf.tm_year = yy - TM_YEAR_BASE; 681 timebuf.tm_isdst = -1; 682 rtime = timegm(&timebuf); 683 if (rtime == -1) { 684 if (noisy || debug != 0) 685 goto bad_parse_time; 686 else 687 goto cleanup_parse_time; 688 } else if (debug) 689 fprintf(ttyout, "parsed date as: %s", ctime(&rtime)); 690 } else if (noisy && debug == 0) { 691 fputs(reply_string, ttyout); 692 putc('\n', ttyout); 693 } 694 cleanup_parse_time: 695 verbose = overbose; 696 if (rtime == -1) 697 code = ocode; 698 return (rtime); 699 } 700 701 /* 702 * update global `remotepwd', which contains the state of the remote cwd 703 */ 704 void 705 updateremotepwd(void) 706 { 707 int overbose, ocode, i; 708 char *cp; 709 710 overbose = verbose; 711 ocode = code; 712 if (debug == 0) 713 verbose = -1; 714 if (command("PWD") != COMPLETE) 715 goto badremotepwd; 716 cp = strchr(reply_string, ' '); 717 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 718 goto badremotepwd; 719 cp += 2; 720 for (i = 0; *cp && i < sizeof(remotepwd) - 1; i++, cp++) { 721 if (cp[0] == '"') { 722 if (cp[1] == '"') 723 cp++; 724 else 725 break; 726 } 727 remotepwd[i] = *cp; 728 } 729 remotepwd[i] = '\0'; 730 if (debug) 731 fprintf(ttyout, "got remotepwd as `%s'\n", remotepwd); 732 goto cleanupremotepwd; 733 badremotepwd: 734 remotepwd[0]='\0'; 735 cleanupremotepwd: 736 verbose = overbose; 737 code = ocode; 738 } 739 740 #ifndef NO_PROGRESS 741 742 /* 743 * return non-zero if we're the current foreground process 744 */ 745 int 746 foregroundproc(void) 747 { 748 static pid_t pgrp = -1; 749 750 if (pgrp == -1) 751 pgrp = getpgrp(); 752 753 return (tcgetpgrp(fileno(ttyout)) == pgrp); 754 } 755 756 757 static void updateprogressmeter(int); 758 759 /* 760 * SIGALRM handler to update the progress meter 761 */ 762 static void 763 updateprogressmeter(int dummy) 764 { 765 int oerrno = errno; 766 767 progressmeter(0); 768 errno = oerrno; 769 } 770 #endif /* NO_PROGRESS */ 771 772 773 /* 774 * List of order of magnitude prefixes. 775 * The last is `P', as 2^64 = 16384 Petabytes 776 */ 777 static const char prefixes[] = " KMGTP"; 778 779 /* 780 * Display a transfer progress bar if progress is non-zero. 781 * SIGALRM is hijacked for use by this function. 782 * - Before the transfer, set filesize to size of file (or -1 if unknown), 783 * and call with flag = -1. This starts the once per second timer, 784 * and a call to updateprogressmeter() upon SIGALRM. 785 * - During the transfer, updateprogressmeter will call progressmeter 786 * with flag = 0 787 * - After the transfer, call with flag = 1 788 */ 789 static struct timeval start; 790 static struct timeval lastupdate; 791 792 #define BUFLEFT (sizeof(buf) - len) 793 794 void 795 progressmeter(int flag) 796 { 797 static off_t lastsize; 798 #ifndef NO_PROGRESS 799 struct timeval now, td, wait; 800 off_t cursize, abbrevsize, bytespersec; 801 double elapsed; 802 int ratio, barlength, i, len, remaining; 803 804 /* 805 * Work variables for progress bar. 806 * 807 * XXX: if the format of the progress bar changes 808 * (especially the number of characters in the 809 * `static' portion of it), be sure to update 810 * these appropriately. 811 */ 812 char buf[256]; /* workspace for progress bar */ 813 #define BAROVERHEAD 43 /* non `*' portion of progress bar */ 814 /* 815 * stars should contain at least 816 * sizeof(buf) - BAROVERHEAD entries 817 */ 818 const char stars[] = 819 "*****************************************************************************" 820 "*****************************************************************************" 821 "*****************************************************************************"; 822 823 #endif 824 825 if (flag == -1) { 826 (void)gettimeofday(&start, NULL); 827 lastupdate = start; 828 lastsize = restart_point; 829 } 830 #ifndef NO_PROGRESS 831 len = 0; 832 if (!progress || filesize <= 0) 833 return; 834 835 (void)gettimeofday(&now, NULL); 836 cursize = bytes + restart_point; 837 timersub(&now, &lastupdate, &wait); 838 if (cursize > lastsize) { 839 lastupdate = now; 840 lastsize = cursize; 841 wait.tv_sec = 0; 842 } 843 844 /* 845 * print progress bar only if we are foreground process. 846 */ 847 if (! foregroundproc()) 848 return; 849 850 ratio = (int)((double)cursize * 100.0 / (double)filesize); 851 ratio = MAX(ratio, 0); 852 ratio = MIN(ratio, 100); 853 len += snprintf(buf + len, BUFLEFT, "\r%3d%% ", ratio); 854 855 /* 856 * calculate the length of the `*' bar, ensuring that 857 * the number of stars won't exceed the buffer size 858 */ 859 barlength = MIN(sizeof(buf) - 1, ttywidth) - BAROVERHEAD; 860 if (barlength > 0) { 861 i = barlength * ratio / 100; 862 len += snprintf(buf + len, BUFLEFT, 863 "|%.*s%*s|", i, stars, barlength - i, ""); 864 } 865 866 abbrevsize = cursize; 867 for (i = 0; abbrevsize >= 100000 && i < sizeof(prefixes); i++) 868 abbrevsize >>= 10; 869 len += snprintf(buf + len, BUFLEFT, 870 #ifndef NO_QUAD 871 " %5lld %c%c ", (long long)abbrevsize, 872 #else 873 " %5ld %c%c ", (long)abbrevsize, 874 #endif 875 prefixes[i], 876 i == 0 ? ' ' : 'B'); 877 878 timersub(&now, &start, &td); 879 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 880 881 bytespersec = 0; 882 if (bytes > 0) { 883 bytespersec = bytes; 884 if (elapsed > 0.0) 885 bytespersec /= elapsed; 886 } 887 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 888 bytespersec >>= 10; 889 len += snprintf(buf + len, BUFLEFT, 890 #ifndef NO_QUAD 891 " %3lld.%02d %cB/s ", (long long)bytespersec / 1024, 892 #else 893 " %3ld.%02d %cB/s ", (long)bytespersec / 1024, 894 #endif 895 (int)((bytespersec % 1024) * 100 / 1024), 896 prefixes[i]); 897 898 if (bytes <= 0 || elapsed <= 0.0 || cursize > filesize) { 899 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 900 } else if (wait.tv_sec >= STALLTIME) { 901 len += snprintf(buf + len, BUFLEFT, " - stalled -"); 902 } else { 903 remaining = (int) 904 ((filesize - restart_point) / (bytes / elapsed) - elapsed); 905 if (remaining >= 100 * SECSPERHOUR) 906 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 907 else { 908 i = remaining / SECSPERHOUR; 909 if (i) 910 len += snprintf(buf + len, BUFLEFT, "%2d:", i); 911 else 912 len += snprintf(buf + len, BUFLEFT, " "); 913 i = remaining % SECSPERHOUR; 914 len += snprintf(buf + len, BUFLEFT, 915 "%02d:%02d ETA", i / 60, i % 60); 916 } 917 } 918 if (flag == 1) 919 len += snprintf(buf + len, BUFLEFT, "\n"); 920 (void)write(fileno(ttyout), buf, len); 921 922 if (flag == -1) { 923 (void)xsignal_restart(SIGALRM, updateprogressmeter, 1); 924 alarmtimer(1); /* set alarm timer for 1 Hz */ 925 } else if (flag == 1) { 926 (void)xsignal(SIGALRM, SIG_DFL); 927 alarmtimer(0); 928 } 929 #endif /* !NO_PROGRESS */ 930 } 931 932 /* 933 * Display transfer statistics. 934 * Requires start to be initialised by progressmeter(-1), 935 * direction to be defined by xfer routines, and filesize and bytes 936 * to be updated by xfer routines 937 * If siginfo is nonzero, an ETA is displayed, and the output goes to stderr 938 * instead of ttyout. 939 */ 940 void 941 ptransfer(int siginfo) 942 { 943 struct timeval now, td, wait; 944 double elapsed; 945 off_t bytespersec; 946 int remaining, hh, i, len; 947 948 char buf[256]; /* Work variable for transfer status. */ 949 950 if (!verbose && !progress && !siginfo) 951 return; 952 953 (void)gettimeofday(&now, NULL); 954 timersub(&now, &start, &td); 955 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 956 bytespersec = 0; 957 if (bytes > 0) { 958 bytespersec = bytes; 959 if (elapsed > 0.0) 960 bytespersec /= elapsed; 961 } 962 len = 0; 963 len += snprintf(buf + len, BUFLEFT, 964 #ifndef NO_QUAD 965 "%lld byte%s %s in ", (long long)bytes, 966 #else 967 "%ld byte%s %s in ", (long)bytes, 968 #endif 969 bytes == 1 ? "" : "s", direction); 970 remaining = (int)elapsed; 971 if (remaining > SECSPERDAY) { 972 int days; 973 974 days = remaining / SECSPERDAY; 975 remaining %= SECSPERDAY; 976 len += snprintf(buf + len, BUFLEFT, 977 "%d day%s ", days, days == 1 ? "" : "s"); 978 } 979 hh = remaining / SECSPERHOUR; 980 remaining %= SECSPERHOUR; 981 if (hh) 982 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 983 len += snprintf(buf + len, BUFLEFT, 984 "%02d:%02d ", remaining / 60, remaining % 60); 985 986 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 987 bytespersec >>= 10; 988 len += snprintf(buf + len, BUFLEFT, 989 #ifndef NO_QUAD 990 "(%lld.%02d %cB/s)", (long long)bytespersec / 1024, 991 #else 992 "(%ld.%02d %cB/s)", (long)bytespersec / 1024, 993 #endif 994 (int)((bytespersec % 1024) * 100 / 1024), 995 prefixes[i]); 996 997 if (siginfo && bytes > 0 && elapsed > 0.0 && filesize >= 0 998 && bytes + restart_point <= filesize) { 999 remaining = (int)((filesize - restart_point) / 1000 (bytes / elapsed) - elapsed); 1001 hh = remaining / SECSPERHOUR; 1002 remaining %= SECSPERHOUR; 1003 len += snprintf(buf + len, BUFLEFT, " ETA: "); 1004 if (hh) 1005 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 1006 len += snprintf(buf + len, BUFLEFT, "%02d:%02d", 1007 remaining / 60, remaining % 60); 1008 timersub(&now, &lastupdate, &wait); 1009 if (wait.tv_sec >= STALLTIME) 1010 len += snprintf(buf + len, BUFLEFT, " (stalled)"); 1011 } 1012 len += snprintf(buf + len, BUFLEFT, "\n"); 1013 (void)write(siginfo ? STDERR_FILENO : fileno(ttyout), buf, len); 1014 } 1015 1016 /* 1017 * SIG{INFO,QUIT} handler to print transfer stats if a transfer is in progress 1018 */ 1019 void 1020 psummary(int notused) 1021 { 1022 int oerrno = errno; 1023 1024 if (bytes > 0) { 1025 if (fromatty) 1026 write(fileno(ttyout), "\n", 1); 1027 ptransfer(1); 1028 } 1029 errno = oerrno; 1030 } 1031 1032 /* 1033 * List words in stringlist, vertically arranged 1034 */ 1035 void 1036 list_vertical(StringList *sl) 1037 { 1038 int i, j, w; 1039 int columns, width, lines, items; 1040 char *p; 1041 1042 width = items = 0; 1043 1044 for (i = 0 ; i < sl->sl_cur ; i++) { 1045 w = strlen(sl->sl_str[i]); 1046 if (w > width) 1047 width = w; 1048 } 1049 width = (width + 8) &~ 7; 1050 1051 columns = ttywidth / width; 1052 if (columns == 0) 1053 columns = 1; 1054 lines = (sl->sl_cur + columns - 1) / columns; 1055 for (i = 0; i < lines; i++) { 1056 for (j = 0; j < columns; j++) { 1057 p = sl->sl_str[j * lines + i]; 1058 if (p) 1059 fputs(p, ttyout); 1060 if (j * lines + i + lines >= sl->sl_cur) { 1061 putc('\n', ttyout); 1062 break; 1063 } 1064 w = strlen(p); 1065 while (w < width) { 1066 w = (w + 8) &~ 7; 1067 (void)putc('\t', ttyout); 1068 } 1069 } 1070 } 1071 } 1072 1073 /* 1074 * Update the global ttywidth value, using TIOCGWINSZ. 1075 */ 1076 void 1077 setttywidth(int a) 1078 { 1079 struct winsize winsize; 1080 int oerrno = errno; 1081 1082 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 1083 winsize.ws_col != 0) 1084 ttywidth = winsize.ws_col; 1085 else 1086 ttywidth = 80; 1087 errno = oerrno; 1088 } 1089 1090 /* 1091 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 1092 */ 1093 void 1094 crankrate(int sig) 1095 { 1096 1097 switch (sig) { 1098 case SIGUSR1: 1099 if (rate_get) 1100 rate_get += rate_get_incr; 1101 if (rate_put) 1102 rate_put += rate_put_incr; 1103 break; 1104 case SIGUSR2: 1105 if (rate_get && rate_get > rate_get_incr) 1106 rate_get -= rate_get_incr; 1107 if (rate_put && rate_put > rate_put_incr) 1108 rate_put -= rate_put_incr; 1109 break; 1110 default: 1111 err(1, "crankrate invoked with unknown signal: %d", sig); 1112 } 1113 } 1114 1115 1116 /* 1117 * Set the SIGALRM interval timer for wait seconds, 0 to disable. 1118 */ 1119 void 1120 alarmtimer(int wait) 1121 { 1122 struct itimerval itv; 1123 1124 itv.it_value.tv_sec = wait; 1125 itv.it_value.tv_usec = 0; 1126 itv.it_interval = itv.it_value; 1127 setitimer(ITIMER_REAL, &itv, NULL); 1128 } 1129 1130 /* 1131 * Setup or cleanup EditLine structures 1132 */ 1133 #ifndef NO_EDITCOMPLETE 1134 void 1135 controlediting(void) 1136 { 1137 if (editing && el == NULL && hist == NULL) { 1138 HistEvent ev; 1139 int editmode; 1140 1141 el = el_init(__progname, stdin, ttyout, stderr); 1142 /* init editline */ 1143 hist = history_init(); /* init the builtin history */ 1144 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 1145 el_set(el, EL_HIST, history, hist); /* use history */ 1146 1147 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 1148 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 1149 el_set(el, EL_RPROMPT, rprompt); 1150 1151 /* add local file completion, bind to TAB */ 1152 el_set(el, EL_ADDFN, "ftp-complete", 1153 "Context sensitive argument completion", 1154 complete); 1155 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 1156 el_source(el, NULL); /* read ~/.editrc */ 1157 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 1158 editing = 0; /* the user doesn't want editing, 1159 * so disable, and let statement 1160 * below cleanup */ 1161 else 1162 el_set(el, EL_SIGNAL, 1); 1163 } 1164 if (!editing) { 1165 if (hist) { 1166 history_end(hist); 1167 hist = NULL; 1168 } 1169 if (el) { 1170 el_end(el); 1171 el = NULL; 1172 } 1173 } 1174 } 1175 #endif /* !NO_EDITCOMPLETE */ 1176 1177 /* 1178 * Convert the string `arg' to an int, which may have an optional SI suffix 1179 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1180 */ 1181 int 1182 strsuftoi(const char *arg) 1183 { 1184 char *cp; 1185 long val; 1186 1187 if (!isdigit((unsigned char)arg[0])) 1188 return (-1); 1189 1190 val = strtol(arg, &cp, 10); 1191 if (cp != NULL) { 1192 if (cp[0] != '\0' && cp[1] != '\0') 1193 return (-1); 1194 switch (tolower((unsigned char)cp[0])) { 1195 case '\0': 1196 case 'b': 1197 break; 1198 case 'k': 1199 val <<= 10; 1200 break; 1201 case 'm': 1202 val <<= 20; 1203 break; 1204 case 'g': 1205 val <<= 30; 1206 break; 1207 default: 1208 return (-1); 1209 } 1210 } 1211 if (val < 0 || val > INT_MAX) 1212 return (-1); 1213 1214 return (val); 1215 } 1216 1217 /* 1218 * Set up socket buffer sizes before a connection is made. 1219 */ 1220 void 1221 setupsockbufsize(int sock) 1222 { 1223 1224 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void *) &sndbuf_size, 1225 sizeof(rcvbuf_size)) < 0) 1226 warn("unable to set sndbuf size %d", sndbuf_size); 1227 1228 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *) &rcvbuf_size, 1229 sizeof(rcvbuf_size)) < 0) 1230 warn("unable to set rcvbuf size %d", rcvbuf_size); 1231 } 1232 1233 /* 1234 * Copy characters from src into dst, \ quoting characters that require it 1235 */ 1236 void 1237 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen) 1238 { 1239 int di, si; 1240 1241 for (di = si = 0; 1242 src[si] != '\0' && di < dstlen && si < srclen; 1243 di++, si++) { 1244 switch (src[si]) { 1245 case '\\': 1246 case ' ': 1247 case '\t': 1248 case '\r': 1249 case '\n': 1250 case '"': 1251 dst[di++] = '\\'; 1252 if (di >= dstlen) 1253 break; 1254 /* FALLTHROUGH */ 1255 default: 1256 dst[di] = src[si]; 1257 } 1258 } 1259 dst[di] = '\0'; 1260 } 1261 1262 /* 1263 * Copy src into buf (which is len bytes long), expanding % sequences. 1264 */ 1265 void 1266 formatbuf(char *buf, size_t len, const char *src) 1267 { 1268 const char *p; 1269 char *p2, *q; 1270 int i, op, updirs, pdirs; 1271 1272 #define ADDBUF(x) do { \ 1273 if (i >= len - 1) \ 1274 goto endbuf; \ 1275 buf[i++] = (x); \ 1276 } while (0) 1277 1278 p = src; 1279 for (i = 0; *p; p++) { 1280 if (*p != '%') { 1281 ADDBUF(*p); 1282 continue; 1283 } 1284 p++; 1285 1286 switch (op = *p) { 1287 1288 case '/': 1289 case '.': 1290 case 'c': 1291 p2 = connected ? remotepwd : ""; 1292 updirs = pdirs = 0; 1293 1294 /* option to determine fixed # of dirs from path */ 1295 if (op == '.' || op == 'c') { 1296 int skip; 1297 1298 q = p2; 1299 while (*p2) /* calc # of /'s */ 1300 if (*p2++ == '/') 1301 updirs++; 1302 if (p[1] == '0') { /* print <x> or ... */ 1303 pdirs = 1; 1304 p++; 1305 } 1306 if (p[1] >= '1' && p[1] <= '9') { 1307 /* calc # to skip */ 1308 skip = p[1] - '0'; 1309 p++; 1310 } else 1311 skip = 1; 1312 1313 updirs -= skip; 1314 while (skip-- > 0) { 1315 while ((p2 > q) && (*p2 != '/')) 1316 p2--; /* back up */ 1317 if (skip && p2 > q) 1318 p2--; 1319 } 1320 if (*p2 == '/' && p2 != q) 1321 p2++; 1322 } 1323 1324 if (updirs > 0 && pdirs) { 1325 if (i >= len - 5) 1326 break; 1327 if (op == '.') { 1328 ADDBUF('.'); 1329 ADDBUF('.'); 1330 ADDBUF('.'); 1331 } else { 1332 ADDBUF('/'); 1333 ADDBUF('<'); 1334 if (updirs > 9) { 1335 ADDBUF('9'); 1336 ADDBUF('+'); 1337 } else 1338 ADDBUF('0' + updirs); 1339 ADDBUF('>'); 1340 } 1341 } 1342 for (; *p2; p2++) 1343 ADDBUF(*p2); 1344 break; 1345 1346 case 'M': 1347 case 'm': 1348 for (p2 = connected ? hostname : "-"; *p2; p2++) { 1349 if (op == 'm' && *p2 == '.') 1350 break; 1351 ADDBUF(*p2); 1352 } 1353 break; 1354 1355 case 'n': 1356 for (p2 = connected ? username : "-"; *p2 ; p2++) 1357 ADDBUF(*p2); 1358 break; 1359 1360 case '%': 1361 ADDBUF('%'); 1362 break; 1363 1364 default: /* display unknown codes literally */ 1365 ADDBUF('%'); 1366 ADDBUF(op); 1367 break; 1368 1369 } 1370 } 1371 endbuf: 1372 buf[i] = '\0'; 1373 } 1374 1375 /* 1376 * Determine if given string is an IPv6 address or not. 1377 * Return 1 for yes, 0 for no 1378 */ 1379 int 1380 isipv6addr(const char *addr) 1381 { 1382 int rv = 0; 1383 #ifdef INET6 1384 struct addrinfo hints, *res; 1385 1386 memset(&hints, 0, sizeof(hints)); 1387 hints.ai_family = PF_INET6; 1388 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1389 hints.ai_flags = AI_NUMERICHOST; 1390 if (getaddrinfo(addr, "0", &hints, &res) != 0) 1391 rv = 0; 1392 else { 1393 rv = 1; 1394 freeaddrinfo(res); 1395 } 1396 if (debug) 1397 fprintf(ttyout, "isipv6addr: got %d for %s\n", rv, addr); 1398 #endif 1399 return (rv == 1) ? 1 : 0; 1400 } 1401 1402 1403 /* 1404 * Internal version of connect(2); sets socket buffer sizes first. 1405 */ 1406 int 1407 xconnect(int sock, const struct sockaddr *name, int namelen) 1408 { 1409 1410 setupsockbufsize(sock); 1411 return (connect(sock, name, namelen)); 1412 } 1413 1414 /* 1415 * Internal version of listen(2); sets socket buffer sizes first. 1416 */ 1417 int 1418 xlisten(int sock, int backlog) 1419 { 1420 1421 setupsockbufsize(sock); 1422 return (listen(sock, backlog)); 1423 } 1424 1425 /* 1426 * malloc() with inbuilt error checking 1427 */ 1428 void * 1429 xmalloc(size_t size) 1430 { 1431 void *p; 1432 1433 p = malloc(size); 1434 if (p == NULL) 1435 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1436 return (p); 1437 } 1438 1439 /* 1440 * sl_init() with inbuilt error checking 1441 */ 1442 StringList * 1443 xsl_init(void) 1444 { 1445 StringList *p; 1446 1447 p = sl_init(); 1448 if (p == NULL) 1449 err(1, "Unable to allocate memory for stringlist"); 1450 return (p); 1451 } 1452 1453 /* 1454 * sl_add() with inbuilt error checking 1455 */ 1456 void 1457 xsl_add(StringList *sl, char *i) 1458 { 1459 1460 if (sl_add(sl, i) == -1) 1461 err(1, "Unable to add `%s' to stringlist", i); 1462 } 1463 1464 /* 1465 * strdup() with inbuilt error checking 1466 */ 1467 char * 1468 xstrdup(const char *str) 1469 { 1470 char *s; 1471 1472 if (str == NULL) 1473 errx(1, "xstrdup() called with NULL argument"); 1474 s = strdup(str); 1475 if (s == NULL) 1476 err(1, "Unable to allocate memory for string copy"); 1477 return (s); 1478 } 1479 1480 /* 1481 * Install a POSIX signal handler, allowing the invoker to set whether 1482 * the signal should be restartable or not 1483 */ 1484 sigfunc 1485 xsignal_restart(int sig, sigfunc func, int restartable) 1486 { 1487 struct sigaction act, oact; 1488 act.sa_handler = func; 1489 1490 sigemptyset(&act.sa_mask); 1491 #if defined(SA_RESTART) /* 4.4BSD, Posix(?), SVR4 */ 1492 act.sa_flags = restartable ? SA_RESTART : 0; 1493 #elif defined(SA_INTERRUPT) /* SunOS 4.x */ 1494 act.sa_flags = restartable ? 0 : SA_INTERRUPT; 1495 #else 1496 #error "system must have SA_RESTART or SA_INTERRUPT" 1497 #endif 1498 if (sigaction(sig, &act, &oact) < 0) 1499 return (SIG_ERR); 1500 return (oact.sa_handler); 1501 } 1502 1503 /* 1504 * Install a signal handler with the `restartable' flag set dependent upon 1505 * which signal is being set. (This is a wrapper to xsignal_restart()) 1506 */ 1507 sigfunc 1508 xsignal(int sig, sigfunc func) 1509 { 1510 int restartable; 1511 1512 /* 1513 * Some signals print output or change the state of the process. 1514 * There should be restartable, so that reads and writes are 1515 * not affected. Some signals should cause program flow to change; 1516 * these signals should not be restartable, so that the system call 1517 * will return with EINTR, and the program will go do something 1518 * different. If the signal handler calls longjmp() or siglongjmp(), 1519 * it doesn't matter if it's restartable. 1520 */ 1521 1522 switch(sig) { 1523 #ifdef SIGINFO 1524 case SIGINFO: 1525 #endif 1526 case SIGQUIT: 1527 case SIGUSR1: 1528 case SIGUSR2: 1529 case SIGWINCH: 1530 restartable = 1; 1531 break; 1532 1533 case SIGALRM: 1534 case SIGINT: 1535 case SIGPIPE: 1536 restartable = 0; 1537 break; 1538 1539 default: 1540 /* 1541 * This is unpleasant, but I don't know what would be better. 1542 * Right now, this "can't happen" 1543 */ 1544 errx(1, "xsignal_restart called with signal %d", sig); 1545 } 1546 1547 return(xsignal_restart(sig, func, restartable)); 1548 } 1549