1 /* $NetBSD: util.c,v 1.91 2000/01/31 22:01:05 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-1999 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 1.91 2000/01/31 22:01:05 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> 106 107 #include "ftp_var.h" 108 109 /* 110 * Connect to peer server and 111 * auto-login, if possible. 112 */ 113 void 114 setpeer(argc, argv) 115 int argc; 116 char *argv[]; 117 { 118 char *host; 119 char *port; 120 121 if (argc == 0) 122 goto usage; 123 if (connected) { 124 fprintf(ttyout, "Already connected to %s, use close first.\n", 125 hostname); 126 code = -1; 127 return; 128 } 129 if (argc < 2) 130 (void)another(&argc, &argv, "to"); 131 if (argc < 2 || argc > 3) { 132 usage: 133 fprintf(ttyout, "usage: %s host-name [port]\n", argv[0]); 134 code = -1; 135 return; 136 } 137 if (gatemode) 138 port = gateport; 139 else 140 port = ftpport; 141 if (argc > 2) 142 port = argv[2]; 143 144 if (gatemode) { 145 if (gateserver == NULL || *gateserver == '\0') 146 errx(1, "gateserver not defined (shouldn't happen)"); 147 host = hookup(gateserver, port); 148 } else 149 host = hookup(argv[1], port); 150 151 if (host) { 152 int overbose; 153 154 if (gatemode && verbose) { 155 fprintf(ttyout, 156 "Connecting via pass-through server %s\n", 157 gateserver); 158 } 159 160 connected = 1; 161 /* 162 * Set up defaults for FTP. 163 */ 164 (void)strlcpy(typename, "ascii", sizeof(typename)); 165 type = TYPE_A; 166 curtype = TYPE_A; 167 (void)strlcpy(formname, "non-print", sizeof(formname)); 168 form = FORM_N; 169 (void)strlcpy(modename, "stream", sizeof(modename)); 170 mode = MODE_S; 171 (void)strlcpy(structname, "file", sizeof(structname)); 172 stru = STRU_F; 173 (void)strlcpy(bytename, "8", sizeof(bytename)); 174 bytesize = 8; 175 if (autologin) 176 (void)ftp_login(argv[1], NULL, NULL); 177 178 overbose = verbose; 179 if (debug == 0) 180 verbose = -1; 181 if (command("SYST") == COMPLETE && overbose) { 182 char *cp, c; 183 c = 0; 184 cp = strchr(reply_string + 4, ' '); 185 if (cp == NULL) 186 cp = strchr(reply_string + 4, '\r'); 187 if (cp) { 188 if (cp[-1] == '.') 189 cp--; 190 c = *cp; 191 *cp = '\0'; 192 } 193 194 fprintf(ttyout, "Remote system type is %s.\n", 195 reply_string + 4); 196 if (cp) 197 *cp = c; 198 } 199 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) { 200 if (proxy) 201 unix_proxy = 1; 202 else 203 unix_server = 1; 204 /* 205 * Set type to 0 (not specified by user), 206 * meaning binary by default, but don't bother 207 * telling server. We can use binary 208 * for text files unless changed by the user. 209 */ 210 type = 0; 211 (void)strlcpy(typename, "binary", sizeof(typename)); 212 if (overbose) 213 fprintf(ttyout, 214 "Using %s mode to transfer files.\n", 215 typename); 216 } else { 217 if (proxy) 218 unix_proxy = 0; 219 else 220 unix_server = 0; 221 if (overbose && 222 !strncmp(reply_string, "215 TOPS20", 10)) 223 fputs( 224 "Remember to set tenex mode when transferring binary files from this machine.\n", 225 ttyout); 226 } 227 verbose = overbose; 228 } 229 } 230 231 /* 232 * Reset the various variables that indicate connection state back to 233 * disconnected settings. 234 * The caller is responsible for issuing any commands to the remote server 235 * to perform a clean shutdown before this is invoked. 236 */ 237 void 238 cleanuppeer() 239 { 240 241 if (cout) 242 (void)fclose(cout); 243 cout = NULL; 244 connected = 0; 245 /* 246 * determine if anonftp was specifically set with -a 247 * (1), or implicitly set by auto_fetch() (2). in the 248 * latter case, disable after the current xfer 249 */ 250 if (anonftp == 2) 251 anonftp = 0; 252 data = -1; 253 epsv4bad = 0; 254 if (username) 255 free(username); 256 username = NULL; 257 if (!proxy) 258 macnum = 0; 259 } 260 261 /* 262 * Top-level signal handler for interrupted commands. 263 */ 264 void 265 intr(dummy) 266 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(dummy) 281 int dummy; 282 { 283 int oerrno = errno; 284 285 alarmtimer(0); 286 if (connected) { 287 if (cout != NULL) { 288 (void)shutdown(fileno(cout), 1+1); 289 (void)fclose(cout); 290 cout = NULL; 291 } 292 if (data >= 0) { 293 (void)shutdown(data, 1+1); 294 (void)close(data); 295 data = -1; 296 } 297 connected = 0; 298 } 299 pswitch(1); 300 if (connected) { 301 if (cout != NULL) { 302 (void)shutdown(fileno(cout), 1+1); 303 (void)fclose(cout); 304 cout = NULL; 305 } 306 connected = 0; 307 } 308 proxflag = 0; 309 pswitch(0); 310 cleanuppeer(); 311 errno = oerrno; 312 } 313 314 315 /* 316 * login to remote host, using given username & password if supplied 317 */ 318 int 319 ftp_login(host, user, pass) 320 const char *host; 321 const char *user, *pass; 322 { 323 char tmp[80]; 324 const char *acct; 325 struct passwd *pw; 326 int n, aflag, rval, freeuser, freepass, freeacct; 327 328 acct = NULL; 329 aflag = rval = freeuser = freepass = freeacct = 0; 330 331 if (debug) 332 fprintf(ttyout, "ftp_login: user `%s' pass `%s' host `%s'\n", 333 user ? user : "<null>", pass ? pass : "<null>", 334 host ? host : "<null>"); 335 336 337 /* 338 * Set up arguments for an anonymous FTP session, if necessary. 339 */ 340 if (anonftp) { 341 user = "anonymous"; /* as per RFC 1635 */ 342 pass = getoptionvalue("anonpass"); 343 } 344 345 if (user == NULL) 346 freeuser = 1; 347 if (pass == NULL) 348 freepass = 1; 349 freeacct = 1; 350 if (ruserpass(host, &user, &pass, &acct) < 0) { 351 code = -1; 352 goto cleanup_ftp_login; 353 } 354 355 while (user == NULL) { 356 const char *myname = getlogin(); 357 358 if (myname == NULL && (pw = getpwuid(getuid())) != NULL) 359 myname = pw->pw_name; 360 if (myname) 361 fprintf(ttyout, "Name (%s:%s): ", host, myname); 362 else 363 fprintf(ttyout, "Name (%s): ", host); 364 *tmp = '\0'; 365 if (fgets(tmp, sizeof(tmp) - 1, stdin) == NULL) { 366 fprintf(ttyout, "\nEOF received; login aborted.\n"); 367 clearerr(stdin); 368 code = -1; 369 goto cleanup_ftp_login; 370 } 371 tmp[strlen(tmp) - 1] = '\0'; 372 freeuser = 0; 373 if (*tmp == '\0') 374 user = myname; 375 else 376 user = tmp; 377 } 378 379 if (gatemode) { 380 char *nuser; 381 int len; 382 383 len = strlen(user) + 1 + strlen(host) + 1; 384 nuser = xmalloc(len); 385 (void)strlcpy(nuser, user, len); 386 (void)strlcat(nuser, "@", len); 387 (void)strlcat(nuser, host, len); 388 freeuser = 1; 389 user = nuser; 390 } 391 392 n = command("USER %s", user); 393 if (n == CONTINUE) { 394 if (pass == NULL) { 395 freepass = 0; 396 pass = getpass("Password:"); 397 } 398 n = command("PASS %s", pass); 399 } 400 if (n == CONTINUE) { 401 aflag++; 402 if (acct == NULL) { 403 freeacct = 0; 404 acct = getpass("Account:"); 405 } 406 if (acct[0] == '\0') { 407 warnx("Login failed."); 408 goto cleanup_ftp_login; 409 } 410 n = command("ACCT %s", acct); 411 } 412 if ((n != COMPLETE) || 413 (!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) { 414 warnx("Login failed."); 415 goto cleanup_ftp_login; 416 } 417 rval = 1; 418 username = xstrdup(user); 419 if (proxy) 420 goto cleanup_ftp_login; 421 422 connected = -1; 423 for (n = 0; n < macnum; ++n) { 424 if (!strcmp("init", macros[n].mac_name)) { 425 (void)strlcpy(line, "$init", sizeof(line)); 426 makeargv(); 427 domacro(margc, margv); 428 break; 429 } 430 } 431 updateremotepwd(); 432 433 cleanup_ftp_login: 434 if (user != NULL && freeuser) 435 free((char *)user); 436 if (pass != NULL && freepass) 437 free((char *)pass); 438 if (acct != NULL && freeacct) 439 free((char *)acct); 440 return (rval); 441 } 442 443 /* 444 * `another' gets another argument, and stores the new argc and argv. 445 * It reverts to the top level (via intr()) on EOF/error. 446 * 447 * Returns false if no new arguments have been added. 448 */ 449 int 450 another(pargc, pargv, prompt) 451 int *pargc; 452 char ***pargv; 453 const char *prompt; 454 { 455 int len = strlen(line), ret; 456 457 if (len >= sizeof(line) - 3) { 458 fputs("sorry, arguments too long.\n", ttyout); 459 intr(0); 460 } 461 fprintf(ttyout, "(%s) ", prompt); 462 line[len++] = ' '; 463 if (fgets(&line[len], sizeof(line) - len, stdin) == NULL) { 464 clearerr(stdin); 465 intr(0); 466 } 467 len += strlen(&line[len]); 468 if (len > 0 && line[len - 1] == '\n') 469 line[len - 1] = '\0'; 470 makeargv(); 471 ret = margc > *pargc; 472 *pargc = margc; 473 *pargv = margv; 474 return (ret); 475 } 476 477 /* 478 * glob files given in argv[] from the remote server. 479 * if errbuf isn't NULL, store error messages there instead 480 * of writing to the screen. 481 */ 482 char * 483 remglob(argv, doswitch, errbuf) 484 char *argv[]; 485 int doswitch; 486 char **errbuf; 487 { 488 char temp[MAXPATHLEN]; 489 static char buf[MAXPATHLEN]; 490 static FILE *ftemp = NULL; 491 static char **args; 492 int oldverbose, oldhash, fd, len; 493 char *cp, *mode; 494 495 if (!mflag || !connected) { 496 if (!doglob) 497 args = NULL; 498 else { 499 if (ftemp) { 500 (void)fclose(ftemp); 501 ftemp = NULL; 502 } 503 } 504 return (NULL); 505 } 506 if (!doglob) { 507 if (args == NULL) 508 args = argv; 509 if ((cp = *++args) == NULL) 510 args = NULL; 511 return (cp); 512 } 513 if (ftemp == NULL) { 514 len = strlcpy(temp, tmpdir, sizeof(temp)); 515 if (temp[len - 1] != '/') 516 (void)strlcat(temp, "/", sizeof(temp)); 517 (void)strlcat(temp, TMPFILE, sizeof(temp)); 518 if ((fd = mkstemp(temp)) < 0) { 519 warn("unable to create temporary file %s", temp); 520 return (NULL); 521 } 522 close(fd); 523 oldverbose = verbose; 524 verbose = (errbuf != NULL) ? -1 : 0; 525 oldhash = hash; 526 hash = 0; 527 if (doswitch) 528 pswitch(!proxy); 529 for (mode = "w"; *++argv != NULL; mode = "a") 530 recvrequest("NLST", temp, *argv, mode, 0, 0); 531 if ((code / 100) != COMPLETE) { 532 if (errbuf != NULL) 533 *errbuf = reply_string; 534 } 535 if (doswitch) 536 pswitch(!proxy); 537 verbose = oldverbose; 538 hash = oldhash; 539 ftemp = fopen(temp, "r"); 540 (void)unlink(temp); 541 if (ftemp == NULL) { 542 if (errbuf == NULL) 543 fputs( 544 "can't find list of remote files, oops.\n", 545 ttyout); 546 else 547 *errbuf = 548 "can't find list of remote files, oops."; 549 return (NULL); 550 } 551 } 552 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 553 (void)fclose(ftemp); 554 ftemp = NULL; 555 return (NULL); 556 } 557 if ((cp = strchr(buf, '\n')) != NULL) 558 *cp = '\0'; 559 return (buf); 560 } 561 562 /* 563 * Glob a local file name specification with the expectation of a single 564 * return value. Can't control multiple values being expanded from the 565 * expression, we return only the first. 566 * Returns NULL on error, or a pointer to a buffer containing the filename 567 * that's the caller's responsiblity to free(3) when finished with. 568 */ 569 char * 570 globulize(pattern) 571 const char *pattern; 572 { 573 glob_t gl; 574 int flags; 575 char *p; 576 577 if (!doglob) 578 return (xstrdup(pattern)); 579 580 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 581 memset(&gl, 0, sizeof(gl)); 582 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 583 warnx("%s: not found", pattern); 584 globfree(&gl); 585 return (NULL); 586 } 587 p = xstrdup(gl.gl_pathv[0]); 588 globfree(&gl); 589 return (p); 590 } 591 592 /* 593 * determine size of remote file 594 */ 595 off_t 596 remotesize(file, noisy) 597 const char *file; 598 int noisy; 599 { 600 int overbose; 601 off_t size; 602 603 overbose = verbose; 604 size = -1; 605 if (debug == 0) 606 verbose = -1; 607 if (command("SIZE %s", file) == COMPLETE) { 608 char *cp, *ep; 609 610 cp = strchr(reply_string, ' '); 611 if (cp != NULL) { 612 cp++; 613 #ifndef NO_QUAD 614 size = strtoq(cp, &ep, 10); 615 #else 616 size = strtol(cp, &ep, 10); 617 #endif 618 if (*ep != '\0' && !isspace((unsigned char)*ep)) 619 size = -1; 620 } 621 } else if (noisy && debug == 0) { 622 fputs(reply_string, ttyout); 623 putc('\n', ttyout); 624 } 625 verbose = overbose; 626 return (size); 627 } 628 629 /* 630 * determine last modification time (in GMT) of remote file 631 */ 632 time_t 633 remotemodtime(file, noisy) 634 const char *file; 635 int noisy; 636 { 637 int overbose; 638 time_t rtime; 639 int ocode; 640 641 overbose = verbose; 642 ocode = code; 643 rtime = -1; 644 if (debug == 0) 645 verbose = -1; 646 if (command("MDTM %s", file) == COMPLETE) { 647 struct tm timebuf; 648 char *timestr, *frac; 649 int yy, mo, day, hour, min, sec; 650 651 /* 652 * time-val = 14DIGIT [ "." 1*DIGIT ] 653 * YYYYMMDDHHMMSS[.sss] 654 * mdtm-response = "213" SP time-val CRLF / error-response 655 */ 656 timestr = reply_string + 4; 657 658 /* 659 * parse fraction. 660 * XXX: ignored for now 661 */ 662 frac = strchr(timestr, '\r'); 663 if (frac != NULL) 664 *frac = '\0'; 665 frac = strchr(timestr, '.'); 666 if (frac != NULL) 667 *frac++ = '\0'; 668 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 669 /* 670 * XXX: Workaround for lame ftpd's that return 671 * `19100' instead of `2000' 672 */ 673 fprintf(ttyout, 674 "Y2K warning! Incorrect time-val `%s' received from server.\n", 675 timestr); 676 timestr++; 677 timestr[0] = '2'; 678 timestr[1] = '0'; 679 fprintf(ttyout, "Converted to `%s'\n", timestr); 680 } 681 if (strlen(timestr) != 14 || 682 sscanf(timestr, "%04d%02d%02d%02d%02d%02d", 683 &yy, &mo, &day, &hour, &min, &sec) != 6) { 684 bad_parse_time: 685 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 686 goto cleanup_parse_time; 687 } 688 memset(&timebuf, 0, sizeof(timebuf)); 689 timebuf.tm_sec = sec; 690 timebuf.tm_min = min; 691 timebuf.tm_hour = hour; 692 timebuf.tm_mday = day; 693 timebuf.tm_mon = mo - 1; 694 timebuf.tm_year = yy - TM_YEAR_BASE; 695 timebuf.tm_isdst = -1; 696 rtime = timegm(&timebuf); 697 if (rtime == -1) { 698 if (noisy || debug != 0) 699 goto bad_parse_time; 700 else 701 goto cleanup_parse_time; 702 } else if (debug) 703 fprintf(ttyout, "parsed date as: %s", ctime(&rtime)); 704 } else if (noisy && debug == 0) { 705 fputs(reply_string, ttyout); 706 putc('\n', ttyout); 707 } 708 cleanup_parse_time: 709 verbose = overbose; 710 if (rtime == -1) 711 code = ocode; 712 return (rtime); 713 } 714 715 /* 716 * update global `remotepwd', which contains the state of the remote cwd 717 */ 718 void 719 updateremotepwd() 720 { 721 int overbose, ocode, i; 722 char *cp; 723 724 overbose = verbose; 725 ocode = code; 726 if (debug == 0) 727 verbose = -1; 728 if (command("PWD") != COMPLETE) 729 goto badremotepwd; 730 cp = strchr(reply_string, ' '); 731 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 732 goto badremotepwd; 733 cp += 2; 734 for (i = 0; *cp && i < sizeof(remotepwd) - 1; i++, cp++) { 735 if (cp[0] == '"') { 736 if (cp[1] == '"') 737 cp++; 738 else 739 break; 740 } 741 remotepwd[i] = *cp; 742 } 743 remotepwd[i] = '\0'; 744 if (debug) 745 fprintf(ttyout, "got remotepwd as `%s'\n", remotepwd); 746 goto cleanupremotepwd; 747 badremotepwd: 748 remotepwd[0]='\0'; 749 cleanupremotepwd: 750 verbose = overbose; 751 code = ocode; 752 } 753 754 #ifndef NO_PROGRESS 755 756 /* 757 * return non-zero if we're the current foreground process 758 */ 759 int 760 foregroundproc() 761 { 762 static pid_t pgrp = -1; 763 764 if (pgrp == -1) 765 pgrp = getpgrp(); 766 767 return (tcgetpgrp(fileno(ttyout)) == pgrp); 768 } 769 770 771 static void updateprogressmeter __P((int)); 772 773 /* 774 * SIGALRM handler to update the progress meter 775 */ 776 static void 777 updateprogressmeter(dummy) 778 int dummy; 779 { 780 int oerrno = errno; 781 782 progressmeter(0); 783 errno = oerrno; 784 } 785 #endif /* NO_PROGRESS */ 786 787 788 /* 789 * List of order of magnitude prefixes. 790 * The last is `P', as 2^64 = 16384 Petabytes 791 */ 792 static const char prefixes[] = " KMGTP"; 793 794 /* 795 * Display a transfer progress bar if progress is non-zero. 796 * SIGALRM is hijacked for use by this function. 797 * - Before the transfer, set filesize to size of file (or -1 if unknown), 798 * and call with flag = -1. This starts the once per second timer, 799 * and a call to updateprogressmeter() upon SIGALRM. 800 * - During the transfer, updateprogressmeter will call progressmeter 801 * with flag = 0 802 * - After the transfer, call with flag = 1 803 */ 804 static struct timeval start; 805 static struct timeval lastupdate; 806 807 #define BUFLEFT (sizeof(buf) - len) 808 809 void 810 progressmeter(flag) 811 int flag; 812 { 813 static off_t lastsize; 814 #ifndef NO_PROGRESS 815 struct timeval now, td, wait; 816 off_t cursize, abbrevsize, bytespersec; 817 double elapsed; 818 int ratio, barlength, i, len, remaining; 819 820 /* 821 * Work variables for progress bar. 822 * 823 * XXX: if the format of the progress bar changes 824 * (especially the number of characters in the 825 * `static' portion of it), be sure to update 826 * these appropriately. 827 */ 828 char buf[256]; /* workspace for progress bar */ 829 #define BAROVERHEAD 43 /* non `*' portion of progress bar */ 830 /* 831 * stars should contain at least 832 * sizeof(buf) - BAROVERHEAD entries 833 */ 834 const char stars[] = 835 "*****************************************************************************" 836 "*****************************************************************************" 837 "*****************************************************************************"; 838 839 #endif 840 841 if (flag == -1) { 842 (void)gettimeofday(&start, NULL); 843 lastupdate = start; 844 lastsize = restart_point; 845 } 846 #ifndef NO_PROGRESS 847 len = 0; 848 if (!progress || filesize <= 0) 849 return; 850 851 (void)gettimeofday(&now, NULL); 852 cursize = bytes + restart_point; 853 timersub(&now, &lastupdate, &wait); 854 if (cursize > lastsize) { 855 lastupdate = now; 856 lastsize = cursize; 857 wait.tv_sec = 0; 858 } 859 860 /* 861 * print progress bar only if we are foreground process. 862 */ 863 if (! foregroundproc()) 864 return; 865 866 ratio = (int)((double)cursize * 100.0 / (double)filesize); 867 ratio = MAX(ratio, 0); 868 ratio = MIN(ratio, 100); 869 len += snprintf(buf + len, BUFLEFT, "\r%3d%% ", ratio); 870 871 /* 872 * calculate the length of the `*' bar, ensuring that 873 * the number of stars won't exceed the buffer size 874 */ 875 barlength = MIN(sizeof(buf) - 1, ttywidth) - BAROVERHEAD; 876 if (barlength > 0) { 877 i = barlength * ratio / 100; 878 len += snprintf(buf + len, BUFLEFT, 879 "|%.*s%*s|", i, stars, barlength - i, ""); 880 } 881 882 abbrevsize = cursize; 883 for (i = 0; abbrevsize >= 100000 && i < sizeof(prefixes); i++) 884 abbrevsize >>= 10; 885 len += snprintf(buf + len, BUFLEFT, 886 #ifndef NO_QUAD 887 " %5lld %c%c ", (long long)abbrevsize, 888 #else 889 " %5ld %c%c ", (long)abbrevsize, 890 #endif 891 prefixes[i], 892 i == 0 ? ' ' : 'B'); 893 894 timersub(&now, &start, &td); 895 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 896 897 bytespersec = 0; 898 if (bytes > 0) { 899 bytespersec = bytes; 900 if (elapsed > 0.0) 901 bytespersec /= elapsed; 902 } 903 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 904 bytespersec >>= 10; 905 len += snprintf(buf + len, BUFLEFT, 906 #ifndef NO_QUAD 907 " %3lld.%02d %cB/s ", (long long)bytespersec / 1024, 908 #else 909 " %3ld.%02d %cB/s ", (long)bytespersec / 1024, 910 #endif 911 (int)((bytespersec % 1024) * 100 / 1024), 912 prefixes[i]); 913 914 if (bytes <= 0 || elapsed <= 0.0 || cursize > filesize) { 915 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 916 } else if (wait.tv_sec >= STALLTIME) { 917 len += snprintf(buf + len, BUFLEFT, " - stalled -"); 918 } else { 919 remaining = (int) 920 ((filesize - restart_point) / (bytes / elapsed) - elapsed); 921 if (remaining >= 100 * SECSPERHOUR) 922 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 923 else { 924 i = remaining / SECSPERHOUR; 925 if (i) 926 len += snprintf(buf + len, BUFLEFT, "%2d:", i); 927 else 928 len += snprintf(buf + len, BUFLEFT, " "); 929 i = remaining % SECSPERHOUR; 930 len += snprintf(buf + len, BUFLEFT, 931 "%02d:%02d ETA", i / 60, i % 60); 932 } 933 } 934 if (flag == 1) 935 len += snprintf(buf + len, BUFLEFT, "\n"); 936 (void)write(fileno(ttyout), buf, len); 937 938 if (flag == -1) { 939 (void)xsignal_restart(SIGALRM, updateprogressmeter, 1); 940 alarmtimer(1); /* set alarm timer for 1 Hz */ 941 } else if (flag == 1) { 942 (void)xsignal(SIGALRM, SIG_DFL); 943 alarmtimer(0); 944 } 945 #endif /* !NO_PROGRESS */ 946 } 947 948 /* 949 * Display transfer statistics. 950 * Requires start to be initialised by progressmeter(-1), 951 * direction to be defined by xfer routines, and filesize and bytes 952 * to be updated by xfer routines 953 * If siginfo is nonzero, an ETA is displayed, and the output goes to stderr 954 * instead of ttyout. 955 */ 956 void 957 ptransfer(siginfo) 958 int siginfo; 959 { 960 struct timeval now, td, wait; 961 double elapsed; 962 off_t bytespersec; 963 int remaining, hh, i, len; 964 965 char buf[256]; /* Work variable for transfer status. */ 966 967 if (!verbose && !progress && !siginfo) 968 return; 969 970 (void)gettimeofday(&now, NULL); 971 timersub(&now, &start, &td); 972 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 973 bytespersec = 0; 974 if (bytes > 0) { 975 bytespersec = bytes; 976 if (elapsed > 0.0) 977 bytespersec /= elapsed; 978 } 979 len = 0; 980 len += snprintf(buf + len, BUFLEFT, 981 #ifndef NO_QUAD 982 "%lld byte%s %s in ", (long long)bytes, 983 #else 984 "%ld byte%s %s in ", (long)bytes, 985 #endif 986 bytes == 1 ? "" : "s", direction); 987 remaining = (int)elapsed; 988 if (remaining > SECSPERDAY) { 989 int days; 990 991 days = remaining / SECSPERDAY; 992 remaining %= SECSPERDAY; 993 len += snprintf(buf + len, BUFLEFT, 994 "%d day%s ", days, days == 1 ? "" : "s"); 995 } 996 hh = remaining / SECSPERHOUR; 997 remaining %= SECSPERHOUR; 998 if (hh) 999 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 1000 len += snprintf(buf + len, BUFLEFT, 1001 "%02d:%02d ", remaining / 60, remaining % 60); 1002 1003 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 1004 bytespersec >>= 10; 1005 len += snprintf(buf + len, BUFLEFT, 1006 #ifndef NO_QUAD 1007 "(%lld.%02d %cB/s)", (long long)bytespersec / 1024, 1008 #else 1009 "(%ld.%02d %cB/s)", (long)bytespersec / 1024, 1010 #endif 1011 (int)((bytespersec % 1024) * 100 / 1024), 1012 prefixes[i]); 1013 1014 if (siginfo && bytes > 0 && elapsed > 0.0 && filesize >= 0 1015 && bytes + restart_point <= filesize) { 1016 remaining = (int)((filesize - restart_point) / 1017 (bytes / elapsed) - elapsed); 1018 hh = remaining / SECSPERHOUR; 1019 remaining %= SECSPERHOUR; 1020 len += snprintf(buf + len, BUFLEFT, " ETA: "); 1021 if (hh) 1022 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 1023 len += snprintf(buf + len, BUFLEFT, "%02d:%02d", 1024 remaining / 60, remaining % 60); 1025 timersub(&now, &lastupdate, &wait); 1026 if (wait.tv_sec >= STALLTIME) 1027 len += snprintf(buf + len, BUFLEFT, " (stalled)"); 1028 } 1029 len += snprintf(buf + len, BUFLEFT, "\n"); 1030 (void)write(siginfo ? STDERR_FILENO : fileno(ttyout), buf, len); 1031 } 1032 1033 /* 1034 * SIG{INFO,QUIT} handler to print transfer stats if a transfer is in progress 1035 */ 1036 void 1037 psummary(notused) 1038 int notused; 1039 { 1040 int oerrno = errno; 1041 1042 if (bytes > 0) { 1043 if (fromatty) 1044 write(fileno(ttyout), "\n", 1); 1045 ptransfer(1); 1046 } 1047 errno = oerrno; 1048 } 1049 1050 /* 1051 * List words in stringlist, vertically arranged 1052 */ 1053 void 1054 list_vertical(sl) 1055 StringList *sl; 1056 { 1057 int i, j, w; 1058 int columns, width, lines, items; 1059 char *p; 1060 1061 width = items = 0; 1062 1063 for (i = 0 ; i < sl->sl_cur ; i++) { 1064 w = strlen(sl->sl_str[i]); 1065 if (w > width) 1066 width = w; 1067 } 1068 width = (width + 8) &~ 7; 1069 1070 columns = ttywidth / width; 1071 if (columns == 0) 1072 columns = 1; 1073 lines = (sl->sl_cur + columns - 1) / columns; 1074 for (i = 0; i < lines; i++) { 1075 for (j = 0; j < columns; j++) { 1076 p = sl->sl_str[j * lines + i]; 1077 if (p) 1078 fputs(p, ttyout); 1079 if (j * lines + i + lines >= sl->sl_cur) { 1080 putc('\n', ttyout); 1081 break; 1082 } 1083 w = strlen(p); 1084 while (w < width) { 1085 w = (w + 8) &~ 7; 1086 (void)putc('\t', ttyout); 1087 } 1088 } 1089 } 1090 } 1091 1092 /* 1093 * Update the global ttywidth value, using TIOCGWINSZ. 1094 */ 1095 void 1096 setttywidth(a) 1097 int a; 1098 { 1099 struct winsize winsize; 1100 int oerrno = errno; 1101 1102 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 1103 winsize.ws_col != 0) 1104 ttywidth = winsize.ws_col; 1105 else 1106 ttywidth = 80; 1107 errno = oerrno; 1108 } 1109 1110 /* 1111 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 1112 */ 1113 void 1114 crankrate(sig) 1115 int sig; 1116 { 1117 1118 switch (sig) { 1119 case SIGUSR1: 1120 if (rate_get) 1121 rate_get += rate_get_incr; 1122 if (rate_put) 1123 rate_put += rate_put_incr; 1124 break; 1125 case SIGUSR2: 1126 if (rate_get && rate_get > rate_get_incr) 1127 rate_get -= rate_get_incr; 1128 if (rate_put && rate_put > rate_put_incr) 1129 rate_put -= rate_put_incr; 1130 break; 1131 default: 1132 err(1, "crankrate invoked with unknown signal: %d", sig); 1133 } 1134 } 1135 1136 1137 /* 1138 * Set the SIGALRM interval timer for wait seconds, 0 to disable. 1139 */ 1140 void 1141 alarmtimer(wait) 1142 int wait; 1143 { 1144 struct itimerval itv; 1145 1146 itv.it_value.tv_sec = wait; 1147 itv.it_value.tv_usec = 0; 1148 itv.it_interval = itv.it_value; 1149 setitimer(ITIMER_REAL, &itv, NULL); 1150 } 1151 1152 /* 1153 * Setup or cleanup EditLine structures 1154 */ 1155 #ifndef NO_EDITCOMPLETE 1156 void 1157 controlediting() 1158 { 1159 if (editing && el == NULL && hist == NULL) { 1160 HistEvent ev; 1161 int editmode; 1162 1163 el = el_init(__progname, stdin, ttyout, stderr); 1164 /* init editline */ 1165 hist = history_init(); /* init the builtin history */ 1166 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 1167 el_set(el, EL_HIST, history, hist); /* use history */ 1168 1169 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 1170 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 1171 el_set(el, EL_RPROMPT, rprompt); 1172 1173 /* add local file completion, bind to TAB */ 1174 el_set(el, EL_ADDFN, "ftp-complete", 1175 "Context sensitive argument completion", 1176 complete); 1177 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 1178 el_source(el, NULL); /* read ~/.editrc */ 1179 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 1180 editing = 0; /* the user doesn't want editing, 1181 * so disable, and let statement 1182 * below cleanup */ 1183 else 1184 el_set(el, EL_SIGNAL, 1); 1185 } 1186 if (!editing) { 1187 if (hist) { 1188 history_end(hist); 1189 hist = NULL; 1190 } 1191 if (el) { 1192 el_end(el); 1193 el = NULL; 1194 } 1195 } 1196 } 1197 #endif /* !NO_EDITCOMPLETE */ 1198 1199 /* 1200 * Convert the string `arg' to an int, which may have an optional SI suffix 1201 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1202 */ 1203 int 1204 strsuftoi(arg) 1205 const char *arg; 1206 { 1207 char *cp; 1208 long val; 1209 1210 if (!isdigit((unsigned char)arg[0])) 1211 return (-1); 1212 1213 val = strtol(arg, &cp, 10); 1214 if (cp != NULL) { 1215 if (cp[0] != '\0' && cp[1] != '\0') 1216 return (-1); 1217 switch (tolower((unsigned char)cp[0])) { 1218 case '\0': 1219 case 'b': 1220 break; 1221 case 'k': 1222 val <<= 10; 1223 break; 1224 case 'm': 1225 val <<= 20; 1226 break; 1227 case 'g': 1228 val <<= 30; 1229 break; 1230 default: 1231 return (-1); 1232 } 1233 } 1234 if (val < 0 || val > INT_MAX) 1235 return (-1); 1236 1237 return (val); 1238 } 1239 1240 /* 1241 * Set up socket buffer sizes before a connection is made. 1242 */ 1243 void 1244 setupsockbufsize(sock) 1245 int sock; 1246 { 1247 1248 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void *) &sndbuf_size, 1249 sizeof(rcvbuf_size)) < 0) 1250 warn("unable to set sndbuf size %d", sndbuf_size); 1251 1252 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *) &rcvbuf_size, 1253 sizeof(rcvbuf_size)) < 0) 1254 warn("unable to set rcvbuf size %d", rcvbuf_size); 1255 } 1256 1257 /* 1258 * Copy characters from src into dst, \ quoting characters that require it 1259 */ 1260 void 1261 ftpvis(dst, dstlen, src, srclen) 1262 char *dst; 1263 size_t dstlen; 1264 const char *src; 1265 size_t srclen; 1266 { 1267 int di, si; 1268 1269 for (di = si = 0; 1270 src[si] != '\0' && di < dstlen && si < srclen; 1271 di++, si++) { 1272 switch (src[si]) { 1273 case '\\': 1274 case ' ': 1275 case '\t': 1276 case '\r': 1277 case '\n': 1278 case '"': 1279 dst[di++] = '\\'; 1280 if (di >= dstlen) 1281 break; 1282 /* FALLTHROUGH */ 1283 default: 1284 dst[di] = src[si]; 1285 } 1286 } 1287 dst[di] = '\0'; 1288 } 1289 1290 /* 1291 * Copy src into buf (which is len bytes long), expanding % sequences. 1292 */ 1293 void 1294 formatbuf(buf, len, src) 1295 char *buf; 1296 size_t len; 1297 const char *src; 1298 { 1299 const char *p; 1300 char *p2, *q; 1301 int i, op, updirs, pdirs; 1302 1303 #define ADDBUF(x) do { \ 1304 if (i >= len - 1) \ 1305 goto endbuf; \ 1306 buf[i++] = (x); \ 1307 } while (0) 1308 1309 p = src; 1310 for (i = 0; *p; p++) { 1311 if (*p != '%') { 1312 ADDBUF(*p); 1313 continue; 1314 } 1315 p++; 1316 1317 switch (op = *p) { 1318 1319 case '/': 1320 case '.': 1321 case 'c': 1322 p2 = connected ? remotepwd : ""; 1323 updirs = pdirs = 0; 1324 1325 /* option to determine fixed # of dirs from path */ 1326 if (op == '.' || op == 'c') { 1327 int skip; 1328 1329 q = p2; 1330 while (*p2) /* calc # of /'s */ 1331 if (*p2++ == '/') 1332 updirs++; 1333 if (p[1] == '0') { /* print <x> or ... */ 1334 pdirs = 1; 1335 p++; 1336 } 1337 if (p[1] >= '1' && p[1] <= '9') { 1338 /* calc # to skip */ 1339 skip = p[1] - '0'; 1340 p++; 1341 } else 1342 skip = 1; 1343 1344 updirs -= skip; 1345 while (skip-- > 0) { 1346 while ((p2 > q) && (*p2 != '/')) 1347 p2--; /* back up */ 1348 if (skip && p2 > q) 1349 p2--; 1350 } 1351 if (*p2 == '/' && p2 != q) 1352 p2++; 1353 } 1354 1355 if (updirs > 0 && pdirs) { 1356 if (i >= len - 5) 1357 break; 1358 if (op == '.') { 1359 ADDBUF('.'); 1360 ADDBUF('.'); 1361 ADDBUF('.'); 1362 } else { 1363 ADDBUF('/'); 1364 ADDBUF('<'); 1365 if (updirs > 9) { 1366 ADDBUF('9'); 1367 ADDBUF('+'); 1368 } else 1369 ADDBUF('0' + updirs); 1370 ADDBUF('>'); 1371 } 1372 } 1373 for (; *p2; p2++) 1374 ADDBUF(*p2); 1375 break; 1376 1377 case 'M': 1378 case 'm': 1379 for (p2 = connected ? hostname : "-"; *p2; p2++) { 1380 if (op == 'm' && *p2 == '.') 1381 break; 1382 ADDBUF(*p2); 1383 } 1384 break; 1385 1386 case 'n': 1387 for (p2 = connected ? username : "-"; *p2 ; p2++) 1388 ADDBUF(*p2); 1389 break; 1390 1391 case '%': 1392 ADDBUF('%'); 1393 break; 1394 1395 default: /* display unknown codes literally */ 1396 ADDBUF('%'); 1397 ADDBUF(op); 1398 break; 1399 1400 } 1401 } 1402 endbuf: 1403 buf[i] = '\0'; 1404 } 1405 1406 /* 1407 * Determine if given string is an IPv6 address or not. 1408 * Return 1 for yes, 0 for no 1409 */ 1410 int 1411 isipv6addr(addr) 1412 const char *addr; 1413 { 1414 int rv = 0; 1415 #ifdef INET6 1416 struct sockaddr_in6 su_sin6; 1417 1418 rv = inet_pton(AF_INET6, addr, &su_sin6.sin6_addr); 1419 if (debug) 1420 fprintf(ttyout, "isipv6addr: got %d for %s\n", rv, addr); 1421 #endif 1422 return (rv == 1) ? 1 : 0; 1423 } 1424 1425 1426 /* 1427 * Internal version of connect(2); sets socket buffer sizes first. 1428 */ 1429 int 1430 xconnect(sock, name, namelen) 1431 int sock; 1432 const struct sockaddr *name; 1433 int namelen; 1434 { 1435 1436 setupsockbufsize(sock); 1437 return (connect(sock, name, namelen)); 1438 } 1439 1440 /* 1441 * Internal version of listen(2); sets socket buffer sizes first. 1442 */ 1443 int 1444 xlisten(sock, backlog) 1445 int sock, backlog; 1446 { 1447 1448 setupsockbufsize(sock); 1449 return (listen(sock, backlog)); 1450 } 1451 1452 /* 1453 * malloc() with inbuilt error checking 1454 */ 1455 void * 1456 xmalloc(size) 1457 size_t size; 1458 { 1459 void *p; 1460 1461 p = malloc(size); 1462 if (p == NULL) 1463 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1464 return (p); 1465 } 1466 1467 /* 1468 * sl_init() with inbuilt error checking 1469 */ 1470 StringList * 1471 xsl_init() 1472 { 1473 StringList *p; 1474 1475 p = sl_init(); 1476 if (p == NULL) 1477 err(1, "Unable to allocate memory for stringlist"); 1478 return (p); 1479 } 1480 1481 /* 1482 * sl_add() with inbuilt error checking 1483 */ 1484 void 1485 xsl_add(sl, i) 1486 StringList *sl; 1487 char *i; 1488 { 1489 1490 if (sl_add(sl, i) == -1) 1491 err(1, "Unable to add `%s' to stringlist", i); 1492 } 1493 1494 /* 1495 * strdup() with inbuilt error checking 1496 */ 1497 char * 1498 xstrdup(str) 1499 const char *str; 1500 { 1501 char *s; 1502 1503 if (str == NULL) 1504 errx(1, "xstrdup() called with NULL argument"); 1505 s = strdup(str); 1506 if (s == NULL) 1507 err(1, "Unable to allocate memory for string copy"); 1508 return (s); 1509 } 1510 1511 /* 1512 * Install a POSIX signal handler, allowing the invoker to set whether 1513 * the signal should be restartable or not 1514 */ 1515 sigfunc 1516 xsignal_restart(sig, func, restartable) 1517 int sig; 1518 sigfunc func; 1519 int restartable; 1520 { 1521 struct sigaction act, oact; 1522 act.sa_handler = func; 1523 1524 sigemptyset(&act.sa_mask); 1525 #if defined(SA_RESTART) /* 4.4BSD, Posix(?), SVR4 */ 1526 act.sa_flags = restartable ? SA_RESTART : 0; 1527 #elif defined(SA_INTERRUPT) /* SunOS 4.x */ 1528 act.sa_flags = restartable ? 0 : SA_INTERRUPT; 1529 #else 1530 #error "system must have SA_RESTART or SA_INTERRUPT" 1531 #endif 1532 if (sigaction(sig, &act, &oact) < 0) 1533 return (SIG_ERR); 1534 return (oact.sa_handler); 1535 } 1536 1537 /* 1538 * Install a signal handler with the `restartable' flag set dependent upon 1539 * which signal is being set. (This is a wrapper to xsignal_restart()) 1540 */ 1541 sigfunc 1542 xsignal(sig, func) 1543 int sig; 1544 sigfunc func; 1545 { 1546 int restartable; 1547 1548 /* 1549 * Some signals print output or change the state of the process. 1550 * There should be restartable, so that reads and writes are 1551 * not affected. Some signals should cause program flow to change; 1552 * these signals should not be restartable, so that the system call 1553 * will return with EINTR, and the program will go do something 1554 * different. If the signal handler calls longjmp() or siglongjmp(), 1555 * it doesn't matter if it's restartable. 1556 */ 1557 1558 switch(sig) { 1559 #ifdef SIGINFO 1560 case SIGINFO: 1561 #endif 1562 case SIGQUIT: 1563 case SIGUSR1: 1564 case SIGUSR2: 1565 case SIGWINCH: 1566 restartable = 1; 1567 break; 1568 1569 case SIGALRM: 1570 case SIGINT: 1571 case SIGPIPE: 1572 restartable = 0; 1573 break; 1574 1575 default: 1576 /* 1577 * This is unpleasant, but I don't know what would be better. 1578 * Right now, this "can't happen" 1579 */ 1580 errx(1, "xsignal_restart called with signal %d", sig); 1581 } 1582 1583 return(xsignal_restart(sig, func, restartable)); 1584 } 1585