1 /* $NetBSD: util.c,v 1.96 2000/06/15 13:08:27 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 1.96 2000/06/15 13:08:27 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 auto-login, if possible. 114 */ 115 void 116 setpeer(int argc, 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 if (gatemode && verbose) { 153 fprintf(ttyout, 154 "Connecting via pass-through server %s\n", 155 gateserver); 156 } 157 158 connected = 1; 159 /* 160 * Set up defaults for FTP. 161 */ 162 (void)strlcpy(typename, "ascii", sizeof(typename)); 163 type = TYPE_A; 164 curtype = TYPE_A; 165 (void)strlcpy(formname, "non-print", sizeof(formname)); 166 form = FORM_N; 167 (void)strlcpy(modename, "stream", sizeof(modename)); 168 mode = MODE_S; 169 (void)strlcpy(structname, "file", sizeof(structname)); 170 stru = STRU_F; 171 (void)strlcpy(bytename, "8", sizeof(bytename)); 172 bytesize = 8; 173 if (autologin) 174 (void)ftp_login(argv[1], NULL, NULL); 175 } 176 } 177 178 /* 179 * Determine the remote system type. 180 * Call after a successful login (i.e, connected = -1) 181 */ 182 void 183 remotesyst(void) 184 { 185 int overbose; 186 187 overbose = verbose; 188 if (debug == 0) 189 verbose = -1; 190 if (command("SYST") == COMPLETE && overbose) { 191 char *cp, c; 192 c = 0; 193 cp = strchr(reply_string + 4, ' '); 194 if (cp == NULL) 195 cp = strchr(reply_string + 4, '\r'); 196 if (cp) { 197 if (cp[-1] == '.') 198 cp--; 199 c = *cp; 200 *cp = '\0'; 201 } 202 203 fprintf(ttyout, "Remote system type is %s.\n", 204 reply_string + 4); 205 if (cp) 206 *cp = c; 207 } 208 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) { 209 if (proxy) 210 unix_proxy = 1; 211 else 212 unix_server = 1; 213 /* 214 * Set type to 0 (not specified by user), 215 * meaning binary by default, but don't bother 216 * telling server. We can use binary 217 * for text files unless changed by the user. 218 */ 219 type = 0; 220 (void)strlcpy(typename, "binary", sizeof(typename)); 221 if (overbose) 222 fprintf(ttyout, 223 "Using %s mode to transfer files.\n", 224 typename); 225 } else { 226 if (proxy) 227 unix_proxy = 0; 228 else 229 unix_server = 0; 230 if (overbose && 231 !strncmp(reply_string, "215 TOPS20", 10)) 232 fputs( 233 "Remember to set tenex mode when transferring binary files from this machine.\n", 234 ttyout); 235 } 236 verbose = overbose; 237 } 238 239 /* 240 * Reset the various variables that indicate connection state back to 241 * disconnected settings. 242 * The caller is responsible for issuing any commands to the remote server 243 * to perform a clean shutdown before this is invoked. 244 */ 245 void 246 cleanuppeer(void) 247 { 248 249 if (cout) 250 (void)fclose(cout); 251 cout = NULL; 252 connected = 0; 253 unix_server = 0; 254 unix_proxy = 0; 255 /* 256 * determine if anonftp was specifically set with -a 257 * (1), or implicitly set by auto_fetch() (2). in the 258 * latter case, disable after the current xfer 259 */ 260 if (anonftp == 2) 261 anonftp = 0; 262 data = -1; 263 epsv4bad = 0; 264 if (username) 265 free(username); 266 username = NULL; 267 if (!proxy) 268 macnum = 0; 269 } 270 271 /* 272 * Top-level signal handler for interrupted commands. 273 */ 274 void 275 intr(int dummy) 276 { 277 278 alarmtimer(0); 279 if (fromatty) 280 write(fileno(ttyout), "\n", 1); 281 siglongjmp(toplevel, 1); 282 } 283 284 /* 285 * Signal handler for lost connections; cleanup various elements of 286 * the connection state, and call cleanuppeer() to finish it off. 287 */ 288 void 289 lostpeer(int dummy) 290 { 291 int oerrno = errno; 292 293 alarmtimer(0); 294 if (connected) { 295 if (cout != NULL) { 296 (void)shutdown(fileno(cout), 1+1); 297 (void)fclose(cout); 298 cout = NULL; 299 } 300 if (data >= 0) { 301 (void)shutdown(data, 1+1); 302 (void)close(data); 303 data = -1; 304 } 305 connected = 0; 306 } 307 pswitch(1); 308 if (connected) { 309 if (cout != NULL) { 310 (void)shutdown(fileno(cout), 1+1); 311 (void)fclose(cout); 312 cout = NULL; 313 } 314 connected = 0; 315 } 316 proxflag = 0; 317 pswitch(0); 318 cleanuppeer(); 319 errno = oerrno; 320 } 321 322 323 /* 324 * Login to remote host, using given username & password if supplied. 325 * Return non-zero if successful. 326 */ 327 int 328 ftp_login(const char *host, const char *user, const char *pass) 329 { 330 char tmp[80]; 331 const char *acct; 332 struct passwd *pw; 333 int n, aflag, rval, freeuser, freepass, freeacct; 334 335 acct = NULL; 336 aflag = rval = freeuser = freepass = freeacct = 0; 337 338 if (debug) 339 fprintf(ttyout, "ftp_login: user `%s' pass `%s' host `%s'\n", 340 user ? user : "<null>", pass ? pass : "<null>", 341 host ? host : "<null>"); 342 343 344 /* 345 * Set up arguments for an anonymous FTP session, if necessary. 346 */ 347 if (anonftp) { 348 user = "anonymous"; /* as per RFC 1635 */ 349 pass = getoptionvalue("anonpass"); 350 } 351 352 if (user == NULL) 353 freeuser = 1; 354 if (pass == NULL) 355 freepass = 1; 356 freeacct = 1; 357 if (ruserpass(host, &user, &pass, &acct) < 0) { 358 code = -1; 359 goto cleanup_ftp_login; 360 } 361 362 while (user == NULL) { 363 const char *myname = getlogin(); 364 365 if (myname == NULL && (pw = getpwuid(getuid())) != NULL) 366 myname = pw->pw_name; 367 if (myname) 368 fprintf(ttyout, "Name (%s:%s): ", host, myname); 369 else 370 fprintf(ttyout, "Name (%s): ", host); 371 *tmp = '\0'; 372 if (fgets(tmp, sizeof(tmp) - 1, stdin) == NULL) { 373 fprintf(ttyout, "\nEOF received; login aborted.\n"); 374 clearerr(stdin); 375 code = -1; 376 goto cleanup_ftp_login; 377 } 378 tmp[strlen(tmp) - 1] = '\0'; 379 freeuser = 0; 380 if (*tmp == '\0') 381 user = myname; 382 else 383 user = tmp; 384 } 385 386 if (gatemode) { 387 char *nuser; 388 int len; 389 390 len = strlen(user) + 1 + strlen(host) + 1; 391 nuser = xmalloc(len); 392 (void)strlcpy(nuser, user, len); 393 (void)strlcat(nuser, "@", len); 394 (void)strlcat(nuser, host, len); 395 freeuser = 1; 396 user = nuser; 397 } 398 399 n = command("USER %s", user); 400 if (n == CONTINUE) { 401 if (pass == NULL) { 402 freepass = 0; 403 pass = getpass("Password:"); 404 } 405 n = command("PASS %s", pass); 406 } 407 if (n == CONTINUE) { 408 aflag++; 409 if (acct == NULL) { 410 freeacct = 0; 411 acct = getpass("Account:"); 412 } 413 if (acct[0] == '\0') { 414 warnx("Login failed."); 415 goto cleanup_ftp_login; 416 } 417 n = command("ACCT %s", acct); 418 } 419 if ((n != COMPLETE) || 420 (!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) { 421 warnx("Login failed."); 422 goto cleanup_ftp_login; 423 } 424 rval = 1; 425 username = xstrdup(user); 426 if (proxy) 427 goto cleanup_ftp_login; 428 429 connected = -1; 430 remotesyst(); 431 for (n = 0; n < macnum; ++n) { 432 if (!strcmp("init", macros[n].mac_name)) { 433 (void)strlcpy(line, "$init", sizeof(line)); 434 makeargv(); 435 domacro(margc, margv); 436 break; 437 } 438 } 439 updateremotepwd(); 440 441 cleanup_ftp_login: 442 if (user != NULL && freeuser) 443 free((char *)user); 444 if (pass != NULL && freepass) 445 free((char *)pass); 446 if (acct != NULL && freeacct) 447 free((char *)acct); 448 return (rval); 449 } 450 451 /* 452 * `another' gets another argument, and stores the new argc and argv. 453 * It reverts to the top level (via intr()) on EOF/error. 454 * 455 * Returns false if no new arguments have been added. 456 */ 457 int 458 another(int *pargc, char ***pargv, const char *prompt) 459 { 460 int len = strlen(line), ret; 461 462 if (len >= sizeof(line) - 3) { 463 fputs("sorry, arguments too long.\n", ttyout); 464 intr(0); 465 } 466 fprintf(ttyout, "(%s) ", prompt); 467 line[len++] = ' '; 468 if (fgets(&line[len], sizeof(line) - len, stdin) == NULL) { 469 clearerr(stdin); 470 intr(0); 471 } 472 len += strlen(&line[len]); 473 if (len > 0 && line[len - 1] == '\n') 474 line[len - 1] = '\0'; 475 makeargv(); 476 ret = margc > *pargc; 477 *pargc = margc; 478 *pargv = margv; 479 return (ret); 480 } 481 482 /* 483 * glob files given in argv[] from the remote server. 484 * if errbuf isn't NULL, store error messages there instead 485 * of writing to the screen. 486 */ 487 char * 488 remglob(char *argv[], int doswitch, char **errbuf) 489 { 490 char temp[MAXPATHLEN]; 491 static char buf[MAXPATHLEN]; 492 static FILE *ftemp = NULL; 493 static char **args; 494 int oldverbose, oldhash, fd, len; 495 char *cp, *mode; 496 497 if (!mflag || !connected) { 498 if (!doglob) 499 args = NULL; 500 else { 501 if (ftemp) { 502 (void)fclose(ftemp); 503 ftemp = NULL; 504 } 505 } 506 return (NULL); 507 } 508 if (!doglob) { 509 if (args == NULL) 510 args = argv; 511 if ((cp = *++args) == NULL) 512 args = NULL; 513 return (cp); 514 } 515 if (ftemp == NULL) { 516 len = strlcpy(temp, tmpdir, sizeof(temp)); 517 if (temp[len - 1] != '/') 518 (void)strlcat(temp, "/", sizeof(temp)); 519 (void)strlcat(temp, TMPFILE, sizeof(temp)); 520 if ((fd = mkstemp(temp)) < 0) { 521 warn("unable to create temporary file %s", temp); 522 return (NULL); 523 } 524 close(fd); 525 oldverbose = verbose; 526 verbose = (errbuf != NULL) ? -1 : 0; 527 oldhash = hash; 528 hash = 0; 529 if (doswitch) 530 pswitch(!proxy); 531 for (mode = "w"; *++argv != NULL; mode = "a") 532 recvrequest("NLST", temp, *argv, mode, 0, 0); 533 if ((code / 100) != COMPLETE) { 534 if (errbuf != NULL) 535 *errbuf = reply_string; 536 } 537 if (doswitch) 538 pswitch(!proxy); 539 verbose = oldverbose; 540 hash = oldhash; 541 ftemp = fopen(temp, "r"); 542 (void)unlink(temp); 543 if (ftemp == NULL) { 544 if (errbuf == NULL) 545 fputs( 546 "can't find list of remote files, oops.\n", 547 ttyout); 548 else 549 *errbuf = 550 "can't find list of remote files, oops."; 551 return (NULL); 552 } 553 } 554 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 555 (void)fclose(ftemp); 556 ftemp = NULL; 557 return (NULL); 558 } 559 if ((cp = strchr(buf, '\n')) != NULL) 560 *cp = '\0'; 561 return (buf); 562 } 563 564 /* 565 * Glob a local file name specification with the expectation of a single 566 * return value. Can't control multiple values being expanded from the 567 * expression, we return only the first. 568 * Returns NULL on error, or a pointer to a buffer containing the filename 569 * that's the caller's responsiblity to free(3) when finished with. 570 */ 571 char * 572 globulize(const char *pattern) 573 { 574 glob_t gl; 575 int flags; 576 char *p; 577 578 if (!doglob) 579 return (xstrdup(pattern)); 580 581 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 582 memset(&gl, 0, sizeof(gl)); 583 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 584 warnx("%s: not found", pattern); 585 globfree(&gl); 586 return (NULL); 587 } 588 p = xstrdup(gl.gl_pathv[0]); 589 globfree(&gl); 590 return (p); 591 } 592 593 /* 594 * determine size of remote file 595 */ 596 off_t 597 remotesize(const char *file, int noisy) 598 { 599 int overbose; 600 off_t size; 601 602 overbose = verbose; 603 size = -1; 604 if (debug == 0) 605 verbose = -1; 606 if (command("SIZE %s", file) == COMPLETE) { 607 char *cp, *ep; 608 609 cp = strchr(reply_string, ' '); 610 if (cp != NULL) { 611 cp++; 612 #ifndef NO_QUAD 613 size = strtoll(cp, &ep, 10); 614 #else 615 size = strtol(cp, &ep, 10); 616 #endif 617 if (*ep != '\0' && !isspace((unsigned char)*ep)) 618 size = -1; 619 } 620 } else if (noisy && debug == 0) { 621 fputs(reply_string, ttyout); 622 putc('\n', ttyout); 623 } 624 verbose = overbose; 625 return (size); 626 } 627 628 /* 629 * determine last modification time (in GMT) of remote file 630 */ 631 time_t 632 remotemodtime(const char *file, int noisy) 633 { 634 int overbose; 635 time_t rtime; 636 int ocode; 637 638 overbose = verbose; 639 ocode = code; 640 rtime = -1; 641 if (debug == 0) 642 verbose = -1; 643 if (command("MDTM %s", file) == COMPLETE) { 644 struct tm timebuf; 645 char *timestr, *frac; 646 int yy, mo, day, hour, min, sec; 647 648 /* 649 * time-val = 14DIGIT [ "." 1*DIGIT ] 650 * YYYYMMDDHHMMSS[.sss] 651 * mdtm-response = "213" SP time-val CRLF / error-response 652 */ 653 timestr = reply_string + 4; 654 655 /* 656 * parse fraction. 657 * XXX: ignored for now 658 */ 659 frac = strchr(timestr, '\r'); 660 if (frac != NULL) 661 *frac = '\0'; 662 frac = strchr(timestr, '.'); 663 if (frac != NULL) 664 *frac++ = '\0'; 665 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 666 /* 667 * XXX: Workaround for lame ftpd's that return 668 * `19100' instead of `2000' 669 */ 670 fprintf(ttyout, 671 "Y2K warning! Incorrect time-val `%s' received from server.\n", 672 timestr); 673 timestr++; 674 timestr[0] = '2'; 675 timestr[1] = '0'; 676 fprintf(ttyout, "Converted to `%s'\n", timestr); 677 } 678 if (strlen(timestr) != 14 || 679 sscanf(timestr, "%04d%02d%02d%02d%02d%02d", 680 &yy, &mo, &day, &hour, &min, &sec) != 6) { 681 bad_parse_time: 682 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 683 goto cleanup_parse_time; 684 } 685 memset(&timebuf, 0, sizeof(timebuf)); 686 timebuf.tm_sec = sec; 687 timebuf.tm_min = min; 688 timebuf.tm_hour = hour; 689 timebuf.tm_mday = day; 690 timebuf.tm_mon = mo - 1; 691 timebuf.tm_year = yy - TM_YEAR_BASE; 692 timebuf.tm_isdst = -1; 693 rtime = timegm(&timebuf); 694 if (rtime == -1) { 695 if (noisy || debug != 0) 696 goto bad_parse_time; 697 else 698 goto cleanup_parse_time; 699 } else if (debug) 700 fprintf(ttyout, "parsed date as: %s", ctime(&rtime)); 701 } else if (noisy && debug == 0) { 702 fputs(reply_string, ttyout); 703 putc('\n', ttyout); 704 } 705 cleanup_parse_time: 706 verbose = overbose; 707 if (rtime == -1) 708 code = ocode; 709 return (rtime); 710 } 711 712 /* 713 * update global `remotepwd', which contains the state of the remote cwd 714 */ 715 void 716 updateremotepwd(void) 717 { 718 int overbose, ocode, i; 719 char *cp; 720 721 overbose = verbose; 722 ocode = code; 723 if (debug == 0) 724 verbose = -1; 725 if (command("PWD") != COMPLETE) 726 goto badremotepwd; 727 cp = strchr(reply_string, ' '); 728 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 729 goto badremotepwd; 730 cp += 2; 731 for (i = 0; *cp && i < sizeof(remotepwd) - 1; i++, cp++) { 732 if (cp[0] == '"') { 733 if (cp[1] == '"') 734 cp++; 735 else 736 break; 737 } 738 remotepwd[i] = *cp; 739 } 740 remotepwd[i] = '\0'; 741 if (debug) 742 fprintf(ttyout, "got remotepwd as `%s'\n", remotepwd); 743 goto cleanupremotepwd; 744 badremotepwd: 745 remotepwd[0]='\0'; 746 cleanupremotepwd: 747 verbose = overbose; 748 code = ocode; 749 } 750 751 #ifndef NO_PROGRESS 752 753 /* 754 * return non-zero if we're the current foreground process 755 */ 756 int 757 foregroundproc(void) 758 { 759 static pid_t pgrp = -1; 760 761 if (pgrp == -1) 762 pgrp = getpgrp(); 763 764 return (tcgetpgrp(fileno(ttyout)) == pgrp); 765 } 766 767 768 static void updateprogressmeter(int); 769 770 /* 771 * SIGALRM handler to update the progress meter 772 */ 773 static void 774 updateprogressmeter(int dummy) 775 { 776 int oerrno = errno; 777 778 progressmeter(0); 779 errno = oerrno; 780 } 781 #endif /* NO_PROGRESS */ 782 783 784 /* 785 * List of order of magnitude prefixes. 786 * The last is `P', as 2^64 = 16384 Petabytes 787 */ 788 static const char prefixes[] = " KMGTP"; 789 790 /* 791 * Display a transfer progress bar if progress is non-zero. 792 * SIGALRM is hijacked for use by this function. 793 * - Before the transfer, set filesize to size of file (or -1 if unknown), 794 * and call with flag = -1. This starts the once per second timer, 795 * and a call to updateprogressmeter() upon SIGALRM. 796 * - During the transfer, updateprogressmeter will call progressmeter 797 * with flag = 0 798 * - After the transfer, call with flag = 1 799 */ 800 static struct timeval start; 801 static struct timeval lastupdate; 802 803 #define BUFLEFT (sizeof(buf) - len) 804 805 void 806 progressmeter(int flag) 807 { 808 static off_t lastsize; 809 #ifndef NO_PROGRESS 810 struct timeval now, td, wait; 811 off_t cursize, abbrevsize, bytespersec; 812 double elapsed; 813 int ratio, barlength, i, len, remaining; 814 815 /* 816 * Work variables for progress bar. 817 * 818 * XXX: if the format of the progress bar changes 819 * (especially the number of characters in the 820 * `static' portion of it), be sure to update 821 * these appropriately. 822 */ 823 char buf[256]; /* workspace for progress bar */ 824 #define BAROVERHEAD 43 /* non `*' portion of progress bar */ 825 /* 826 * stars should contain at least 827 * sizeof(buf) - BAROVERHEAD entries 828 */ 829 const char stars[] = 830 "*****************************************************************************" 831 "*****************************************************************************" 832 "*****************************************************************************"; 833 834 #endif 835 836 if (flag == -1) { 837 (void)gettimeofday(&start, NULL); 838 lastupdate = start; 839 lastsize = restart_point; 840 } 841 #ifndef NO_PROGRESS 842 len = 0; 843 if (!progress || filesize <= 0) 844 return; 845 846 (void)gettimeofday(&now, NULL); 847 cursize = bytes + restart_point; 848 timersub(&now, &lastupdate, &wait); 849 if (cursize > lastsize) { 850 lastupdate = now; 851 lastsize = cursize; 852 wait.tv_sec = 0; 853 } 854 855 /* 856 * print progress bar only if we are foreground process. 857 */ 858 if (! foregroundproc()) 859 return; 860 861 ratio = (int)((double)cursize * 100.0 / (double)filesize); 862 ratio = MAX(ratio, 0); 863 ratio = MIN(ratio, 100); 864 len += snprintf(buf + len, BUFLEFT, "\r%3d%% ", ratio); 865 866 /* 867 * calculate the length of the `*' bar, ensuring that 868 * the number of stars won't exceed the buffer size 869 */ 870 barlength = MIN(sizeof(buf) - 1, ttywidth) - BAROVERHEAD; 871 if (barlength > 0) { 872 i = barlength * ratio / 100; 873 len += snprintf(buf + len, BUFLEFT, 874 "|%.*s%*s|", i, stars, barlength - i, ""); 875 } 876 877 abbrevsize = cursize; 878 for (i = 0; abbrevsize >= 100000 && i < sizeof(prefixes); i++) 879 abbrevsize >>= 10; 880 len += snprintf(buf + len, BUFLEFT, 881 #ifndef NO_QUAD 882 " %5lld %c%c ", (long long)abbrevsize, 883 #else 884 " %5ld %c%c ", (long)abbrevsize, 885 #endif 886 prefixes[i], 887 i == 0 ? ' ' : 'B'); 888 889 timersub(&now, &start, &td); 890 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 891 892 bytespersec = 0; 893 if (bytes > 0) { 894 bytespersec = bytes; 895 if (elapsed > 0.0) 896 bytespersec /= elapsed; 897 } 898 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 899 bytespersec >>= 10; 900 len += snprintf(buf + len, BUFLEFT, 901 #ifndef NO_QUAD 902 " %3lld.%02d %cB/s ", (long long)bytespersec / 1024, 903 #else 904 " %3ld.%02d %cB/s ", (long)bytespersec / 1024, 905 #endif 906 (int)((bytespersec % 1024) * 100 / 1024), 907 prefixes[i]); 908 909 if (bytes <= 0 || elapsed <= 0.0 || cursize > filesize) { 910 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 911 } else if (wait.tv_sec >= STALLTIME) { 912 len += snprintf(buf + len, BUFLEFT, " - stalled -"); 913 } else { 914 remaining = (int) 915 ((filesize - restart_point) / (bytes / elapsed) - elapsed); 916 if (remaining >= 100 * SECSPERHOUR) 917 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 918 else { 919 i = remaining / SECSPERHOUR; 920 if (i) 921 len += snprintf(buf + len, BUFLEFT, "%2d:", i); 922 else 923 len += snprintf(buf + len, BUFLEFT, " "); 924 i = remaining % SECSPERHOUR; 925 len += snprintf(buf + len, BUFLEFT, 926 "%02d:%02d ETA", i / 60, i % 60); 927 } 928 } 929 if (flag == 1) 930 len += snprintf(buf + len, BUFLEFT, "\n"); 931 (void)write(fileno(ttyout), buf, len); 932 933 if (flag == -1) { 934 (void)xsignal_restart(SIGALRM, updateprogressmeter, 1); 935 alarmtimer(1); /* set alarm timer for 1 Hz */ 936 } else if (flag == 1) { 937 (void)xsignal(SIGALRM, SIG_DFL); 938 alarmtimer(0); 939 } 940 #endif /* !NO_PROGRESS */ 941 } 942 943 /* 944 * Display transfer statistics. 945 * Requires start to be initialised by progressmeter(-1), 946 * direction to be defined by xfer routines, and filesize and bytes 947 * to be updated by xfer routines 948 * If siginfo is nonzero, an ETA is displayed, and the output goes to stderr 949 * instead of ttyout. 950 */ 951 void 952 ptransfer(int siginfo) 953 { 954 struct timeval now, td, wait; 955 double elapsed; 956 off_t bytespersec; 957 int remaining, hh, i, len; 958 959 char buf[256]; /* Work variable for transfer status. */ 960 961 if (!verbose && !progress && !siginfo) 962 return; 963 964 (void)gettimeofday(&now, NULL); 965 timersub(&now, &start, &td); 966 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 967 bytespersec = 0; 968 if (bytes > 0) { 969 bytespersec = bytes; 970 if (elapsed > 0.0) 971 bytespersec /= elapsed; 972 } 973 len = 0; 974 len += snprintf(buf + len, BUFLEFT, 975 #ifndef NO_QUAD 976 "%lld byte%s %s in ", (long long)bytes, 977 #else 978 "%ld byte%s %s in ", (long)bytes, 979 #endif 980 bytes == 1 ? "" : "s", direction); 981 remaining = (int)elapsed; 982 if (remaining > SECSPERDAY) { 983 int days; 984 985 days = remaining / SECSPERDAY; 986 remaining %= SECSPERDAY; 987 len += snprintf(buf + len, BUFLEFT, 988 "%d day%s ", days, days == 1 ? "" : "s"); 989 } 990 hh = remaining / SECSPERHOUR; 991 remaining %= SECSPERHOUR; 992 if (hh) 993 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 994 len += snprintf(buf + len, BUFLEFT, 995 "%02d:%02d ", remaining / 60, remaining % 60); 996 997 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 998 bytespersec >>= 10; 999 len += snprintf(buf + len, BUFLEFT, 1000 #ifndef NO_QUAD 1001 "(%lld.%02d %cB/s)", (long long)bytespersec / 1024, 1002 #else 1003 "(%ld.%02d %cB/s)", (long)bytespersec / 1024, 1004 #endif 1005 (int)((bytespersec % 1024) * 100 / 1024), 1006 prefixes[i]); 1007 1008 if (siginfo && bytes > 0 && elapsed > 0.0 && filesize >= 0 1009 && bytes + restart_point <= filesize) { 1010 remaining = (int)((filesize - restart_point) / 1011 (bytes / elapsed) - elapsed); 1012 hh = remaining / SECSPERHOUR; 1013 remaining %= SECSPERHOUR; 1014 len += snprintf(buf + len, BUFLEFT, " ETA: "); 1015 if (hh) 1016 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 1017 len += snprintf(buf + len, BUFLEFT, "%02d:%02d", 1018 remaining / 60, remaining % 60); 1019 timersub(&now, &lastupdate, &wait); 1020 if (wait.tv_sec >= STALLTIME) 1021 len += snprintf(buf + len, BUFLEFT, " (stalled)"); 1022 } 1023 len += snprintf(buf + len, BUFLEFT, "\n"); 1024 (void)write(siginfo ? STDERR_FILENO : fileno(ttyout), buf, len); 1025 } 1026 1027 /* 1028 * SIG{INFO,QUIT} handler to print transfer stats if a transfer is in progress 1029 */ 1030 void 1031 psummary(int notused) 1032 { 1033 int oerrno = errno; 1034 1035 if (bytes > 0) { 1036 if (fromatty) 1037 write(fileno(ttyout), "\n", 1); 1038 ptransfer(1); 1039 } 1040 errno = oerrno; 1041 } 1042 1043 /* 1044 * List words in stringlist, vertically arranged 1045 */ 1046 void 1047 list_vertical(StringList *sl) 1048 { 1049 int i, j, w; 1050 int columns, width, lines, items; 1051 char *p; 1052 1053 width = items = 0; 1054 1055 for (i = 0 ; i < sl->sl_cur ; i++) { 1056 w = strlen(sl->sl_str[i]); 1057 if (w > width) 1058 width = w; 1059 } 1060 width = (width + 8) &~ 7; 1061 1062 columns = ttywidth / width; 1063 if (columns == 0) 1064 columns = 1; 1065 lines = (sl->sl_cur + columns - 1) / columns; 1066 for (i = 0; i < lines; i++) { 1067 for (j = 0; j < columns; j++) { 1068 p = sl->sl_str[j * lines + i]; 1069 if (p) 1070 fputs(p, ttyout); 1071 if (j * lines + i + lines >= sl->sl_cur) { 1072 putc('\n', ttyout); 1073 break; 1074 } 1075 w = strlen(p); 1076 while (w < width) { 1077 w = (w + 8) &~ 7; 1078 (void)putc('\t', ttyout); 1079 } 1080 } 1081 } 1082 } 1083 1084 /* 1085 * Update the global ttywidth value, using TIOCGWINSZ. 1086 */ 1087 void 1088 setttywidth(int a) 1089 { 1090 struct winsize winsize; 1091 int oerrno = errno; 1092 1093 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 1094 winsize.ws_col != 0) 1095 ttywidth = winsize.ws_col; 1096 else 1097 ttywidth = 80; 1098 errno = oerrno; 1099 } 1100 1101 /* 1102 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 1103 */ 1104 void 1105 crankrate(int sig) 1106 { 1107 1108 switch (sig) { 1109 case SIGUSR1: 1110 if (rate_get) 1111 rate_get += rate_get_incr; 1112 if (rate_put) 1113 rate_put += rate_put_incr; 1114 break; 1115 case SIGUSR2: 1116 if (rate_get && rate_get > rate_get_incr) 1117 rate_get -= rate_get_incr; 1118 if (rate_put && rate_put > rate_put_incr) 1119 rate_put -= rate_put_incr; 1120 break; 1121 default: 1122 err(1, "crankrate invoked with unknown signal: %d", sig); 1123 } 1124 } 1125 1126 1127 /* 1128 * Set the SIGALRM interval timer for wait seconds, 0 to disable. 1129 */ 1130 void 1131 alarmtimer(int wait) 1132 { 1133 struct itimerval itv; 1134 1135 itv.it_value.tv_sec = wait; 1136 itv.it_value.tv_usec = 0; 1137 itv.it_interval = itv.it_value; 1138 setitimer(ITIMER_REAL, &itv, NULL); 1139 } 1140 1141 /* 1142 * Setup or cleanup EditLine structures 1143 */ 1144 #ifndef NO_EDITCOMPLETE 1145 void 1146 controlediting(void) 1147 { 1148 if (editing && el == NULL && hist == NULL) { 1149 HistEvent ev; 1150 int editmode; 1151 1152 el = el_init(__progname, stdin, ttyout, stderr); 1153 /* init editline */ 1154 hist = history_init(); /* init the builtin history */ 1155 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 1156 el_set(el, EL_HIST, history, hist); /* use history */ 1157 1158 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 1159 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 1160 el_set(el, EL_RPROMPT, rprompt); 1161 1162 /* add local file completion, bind to TAB */ 1163 el_set(el, EL_ADDFN, "ftp-complete", 1164 "Context sensitive argument completion", 1165 complete); 1166 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 1167 el_source(el, NULL); /* read ~/.editrc */ 1168 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 1169 editing = 0; /* the user doesn't want editing, 1170 * so disable, and let statement 1171 * below cleanup */ 1172 else 1173 el_set(el, EL_SIGNAL, 1); 1174 } 1175 if (!editing) { 1176 if (hist) { 1177 history_end(hist); 1178 hist = NULL; 1179 } 1180 if (el) { 1181 el_end(el); 1182 el = NULL; 1183 } 1184 } 1185 } 1186 #endif /* !NO_EDITCOMPLETE */ 1187 1188 /* 1189 * Convert the string `arg' to an int, which may have an optional SI suffix 1190 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1191 */ 1192 int 1193 strsuftoi(const char *arg) 1194 { 1195 char *cp; 1196 long val; 1197 1198 if (!isdigit((unsigned char)arg[0])) 1199 return (-1); 1200 1201 val = strtol(arg, &cp, 10); 1202 if (cp != NULL) { 1203 if (cp[0] != '\0' && cp[1] != '\0') 1204 return (-1); 1205 switch (tolower((unsigned char)cp[0])) { 1206 case '\0': 1207 case 'b': 1208 break; 1209 case 'k': 1210 val <<= 10; 1211 break; 1212 case 'm': 1213 val <<= 20; 1214 break; 1215 case 'g': 1216 val <<= 30; 1217 break; 1218 default: 1219 return (-1); 1220 } 1221 } 1222 if (val < 0 || val > INT_MAX) 1223 return (-1); 1224 1225 return (val); 1226 } 1227 1228 /* 1229 * Set up socket buffer sizes before a connection is made. 1230 */ 1231 void 1232 setupsockbufsize(int sock) 1233 { 1234 1235 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, (void *) &sndbuf_size, 1236 sizeof(rcvbuf_size)) < 0) 1237 warn("unable to set sndbuf size %d", sndbuf_size); 1238 1239 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, (void *) &rcvbuf_size, 1240 sizeof(rcvbuf_size)) < 0) 1241 warn("unable to set rcvbuf size %d", rcvbuf_size); 1242 } 1243 1244 /* 1245 * Copy characters from src into dst, \ quoting characters that require it 1246 */ 1247 void 1248 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen) 1249 { 1250 int di, si; 1251 1252 for (di = si = 0; 1253 src[si] != '\0' && di < dstlen && si < srclen; 1254 di++, si++) { 1255 switch (src[si]) { 1256 case '\\': 1257 case ' ': 1258 case '\t': 1259 case '\r': 1260 case '\n': 1261 case '"': 1262 dst[di++] = '\\'; 1263 if (di >= dstlen) 1264 break; 1265 /* FALLTHROUGH */ 1266 default: 1267 dst[di] = src[si]; 1268 } 1269 } 1270 dst[di] = '\0'; 1271 } 1272 1273 /* 1274 * Copy src into buf (which is len bytes long), expanding % sequences. 1275 */ 1276 void 1277 formatbuf(char *buf, size_t len, const char *src) 1278 { 1279 const char *p; 1280 char *p2, *q; 1281 int i, op, updirs, pdirs; 1282 1283 #define ADDBUF(x) do { \ 1284 if (i >= len - 1) \ 1285 goto endbuf; \ 1286 buf[i++] = (x); \ 1287 } while (0) 1288 1289 p = src; 1290 for (i = 0; *p; p++) { 1291 if (*p != '%') { 1292 ADDBUF(*p); 1293 continue; 1294 } 1295 p++; 1296 1297 switch (op = *p) { 1298 1299 case '/': 1300 case '.': 1301 case 'c': 1302 p2 = connected ? remotepwd : ""; 1303 updirs = pdirs = 0; 1304 1305 /* option to determine fixed # of dirs from path */ 1306 if (op == '.' || op == 'c') { 1307 int skip; 1308 1309 q = p2; 1310 while (*p2) /* calc # of /'s */ 1311 if (*p2++ == '/') 1312 updirs++; 1313 if (p[1] == '0') { /* print <x> or ... */ 1314 pdirs = 1; 1315 p++; 1316 } 1317 if (p[1] >= '1' && p[1] <= '9') { 1318 /* calc # to skip */ 1319 skip = p[1] - '0'; 1320 p++; 1321 } else 1322 skip = 1; 1323 1324 updirs -= skip; 1325 while (skip-- > 0) { 1326 while ((p2 > q) && (*p2 != '/')) 1327 p2--; /* back up */ 1328 if (skip && p2 > q) 1329 p2--; 1330 } 1331 if (*p2 == '/' && p2 != q) 1332 p2++; 1333 } 1334 1335 if (updirs > 0 && pdirs) { 1336 if (i >= len - 5) 1337 break; 1338 if (op == '.') { 1339 ADDBUF('.'); 1340 ADDBUF('.'); 1341 ADDBUF('.'); 1342 } else { 1343 ADDBUF('/'); 1344 ADDBUF('<'); 1345 if (updirs > 9) { 1346 ADDBUF('9'); 1347 ADDBUF('+'); 1348 } else 1349 ADDBUF('0' + updirs); 1350 ADDBUF('>'); 1351 } 1352 } 1353 for (; *p2; p2++) 1354 ADDBUF(*p2); 1355 break; 1356 1357 case 'M': 1358 case 'm': 1359 for (p2 = connected ? hostname : "-"; *p2; p2++) { 1360 if (op == 'm' && *p2 == '.') 1361 break; 1362 ADDBUF(*p2); 1363 } 1364 break; 1365 1366 case 'n': 1367 for (p2 = connected ? username : "-"; *p2 ; p2++) 1368 ADDBUF(*p2); 1369 break; 1370 1371 case '%': 1372 ADDBUF('%'); 1373 break; 1374 1375 default: /* display unknown codes literally */ 1376 ADDBUF('%'); 1377 ADDBUF(op); 1378 break; 1379 1380 } 1381 } 1382 endbuf: 1383 buf[i] = '\0'; 1384 } 1385 1386 /* 1387 * Determine if given string is an IPv6 address or not. 1388 * Return 1 for yes, 0 for no 1389 */ 1390 int 1391 isipv6addr(const char *addr) 1392 { 1393 int rv = 0; 1394 #ifdef INET6 1395 struct addrinfo hints, *res; 1396 1397 memset(&hints, 0, sizeof(hints)); 1398 hints.ai_family = PF_INET6; 1399 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1400 hints.ai_flags = AI_NUMERICHOST; 1401 if (getaddrinfo(addr, "0", &hints, &res) != 0) 1402 rv = 0; 1403 else { 1404 rv = 1; 1405 freeaddrinfo(res); 1406 } 1407 if (debug) 1408 fprintf(ttyout, "isipv6addr: got %d for %s\n", rv, addr); 1409 #endif 1410 return (rv == 1) ? 1 : 0; 1411 } 1412 1413 1414 /* 1415 * Internal version of connect(2); sets socket buffer sizes first. 1416 */ 1417 int 1418 xconnect(int sock, const struct sockaddr *name, int namelen) 1419 { 1420 1421 setupsockbufsize(sock); 1422 return (connect(sock, name, namelen)); 1423 } 1424 1425 /* 1426 * Internal version of listen(2); sets socket buffer sizes first. 1427 */ 1428 int 1429 xlisten(int sock, int backlog) 1430 { 1431 1432 setupsockbufsize(sock); 1433 return (listen(sock, backlog)); 1434 } 1435 1436 /* 1437 * malloc() with inbuilt error checking 1438 */ 1439 void * 1440 xmalloc(size_t size) 1441 { 1442 void *p; 1443 1444 p = malloc(size); 1445 if (p == NULL) 1446 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1447 return (p); 1448 } 1449 1450 /* 1451 * sl_init() with inbuilt error checking 1452 */ 1453 StringList * 1454 xsl_init(void) 1455 { 1456 StringList *p; 1457 1458 p = sl_init(); 1459 if (p == NULL) 1460 err(1, "Unable to allocate memory for stringlist"); 1461 return (p); 1462 } 1463 1464 /* 1465 * sl_add() with inbuilt error checking 1466 */ 1467 void 1468 xsl_add(StringList *sl, char *i) 1469 { 1470 1471 if (sl_add(sl, i) == -1) 1472 err(1, "Unable to add `%s' to stringlist", i); 1473 } 1474 1475 /* 1476 * strdup() with inbuilt error checking 1477 */ 1478 char * 1479 xstrdup(const char *str) 1480 { 1481 char *s; 1482 1483 if (str == NULL) 1484 errx(1, "xstrdup() called with NULL argument"); 1485 s = strdup(str); 1486 if (s == NULL) 1487 err(1, "Unable to allocate memory for string copy"); 1488 return (s); 1489 } 1490 1491 /* 1492 * Install a POSIX signal handler, allowing the invoker to set whether 1493 * the signal should be restartable or not 1494 */ 1495 sigfunc 1496 xsignal_restart(int sig, sigfunc func, int restartable) 1497 { 1498 struct sigaction act, oact; 1499 act.sa_handler = func; 1500 1501 sigemptyset(&act.sa_mask); 1502 #if defined(SA_RESTART) /* 4.4BSD, Posix(?), SVR4 */ 1503 act.sa_flags = restartable ? SA_RESTART : 0; 1504 #elif defined(SA_INTERRUPT) /* SunOS 4.x */ 1505 act.sa_flags = restartable ? 0 : SA_INTERRUPT; 1506 #else 1507 #error "system must have SA_RESTART or SA_INTERRUPT" 1508 #endif 1509 if (sigaction(sig, &act, &oact) < 0) 1510 return (SIG_ERR); 1511 return (oact.sa_handler); 1512 } 1513 1514 /* 1515 * Install a signal handler with the `restartable' flag set dependent upon 1516 * which signal is being set. (This is a wrapper to xsignal_restart()) 1517 */ 1518 sigfunc 1519 xsignal(int sig, sigfunc func) 1520 { 1521 int restartable; 1522 1523 /* 1524 * Some signals print output or change the state of the process. 1525 * There should be restartable, so that reads and writes are 1526 * not affected. Some signals should cause program flow to change; 1527 * these signals should not be restartable, so that the system call 1528 * will return with EINTR, and the program will go do something 1529 * different. If the signal handler calls longjmp() or siglongjmp(), 1530 * it doesn't matter if it's restartable. 1531 */ 1532 1533 switch(sig) { 1534 #ifdef SIGINFO 1535 case SIGINFO: 1536 #endif 1537 case SIGQUIT: 1538 case SIGUSR1: 1539 case SIGUSR2: 1540 case SIGWINCH: 1541 restartable = 1; 1542 break; 1543 1544 case SIGALRM: 1545 case SIGINT: 1546 case SIGPIPE: 1547 restartable = 0; 1548 break; 1549 1550 default: 1551 /* 1552 * This is unpleasant, but I don't know what would be better. 1553 * Right now, this "can't happen" 1554 */ 1555 errx(1, "xsignal_restart called with signal %d", sig); 1556 } 1557 1558 return(xsignal_restart(sig, func, restartable)); 1559 } 1560