1 /* $NetBSD: interactive.c,v 1.20 2005/01/08 14:30:39 fredb Exp $ */ 2 3 /* 4 * Copyright (c) 1985, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)interactive.c 8.5 (Berkeley) 5/1/95"; 36 #else 37 __RCSID("$NetBSD: interactive.c,v 1.20 2005/01/08 14:30:39 fredb Exp $"); 38 #endif 39 #endif /* not lint */ 40 41 #include <sys/param.h> 42 #include <sys/time.h> 43 #include <sys/stat.h> 44 45 #include <ufs/ufs/dinode.h> 46 #include <ufs/ufs/dir.h> 47 #include <ufs/ffs/fs.h> 48 #include <protocols/dumprestore.h> 49 50 #include <setjmp.h> 51 #include <glob.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 56 #include "restore.h" 57 #include "extern.h" 58 59 #define round(a, b) (((a) + (b) - 1) / (b) * (b)) 60 61 /* 62 * Things to handle interruptions. 63 */ 64 static int runshell; 65 static jmp_buf reset; 66 static char *nextarg = NULL; 67 68 /* 69 * Structure and routines associated with listing directories. 70 */ 71 struct afile { 72 ino_t fnum; /* inode number of file */ 73 char *fname; /* file name */ 74 short len; /* name length */ 75 char prefix; /* prefix character */ 76 char postfix; /* postfix character */ 77 }; 78 struct arglist { 79 int freeglob; /* glob structure needs to be freed */ 80 int argcnt; /* next globbed argument to return */ 81 glob_t glob; /* globbing information */ 82 char *cmd; /* the current command */ 83 }; 84 85 static char *copynext __P((char *, char *)); 86 static int fcmp __P((const void *, const void *)); 87 static void formatf __P((struct afile *, int)); 88 static void getcmd __P((char *, char *, char *, struct arglist *)); 89 struct dirent *glob_readdir __P((RST_DIR *dirp)); 90 static int glob_stat __P((const char *, struct stat *)); 91 static void mkentry __P((char *, struct direct *, struct afile *)); 92 static void printlist __P((char *, char *)); 93 94 /* 95 * Read and execute commands from the terminal. 96 */ 97 void 98 runcmdshell() 99 { 100 struct entry *np; 101 ino_t ino; 102 struct arglist arglist; 103 char curdir[MAXPATHLEN]; 104 char name[MAXPATHLEN]; 105 char cmd[BUFSIZ]; 106 107 arglist.freeglob = 0; 108 arglist.argcnt = 0; 109 arglist.glob.gl_flags = GLOB_ALTDIRFUNC; 110 arglist.glob.gl_opendir = (void *)rst_opendir; 111 arglist.glob.gl_readdir = (void *)glob_readdir; 112 arglist.glob.gl_closedir = (void *)rst_closedir; 113 arglist.glob.gl_lstat = glob_stat; 114 arglist.glob.gl_stat = glob_stat; 115 canon("/", curdir); 116 loop: 117 if (setjmp(reset) != 0) { 118 if (arglist.freeglob != 0) { 119 arglist.freeglob = 0; 120 arglist.argcnt = 0; 121 globfree(&arglist.glob); 122 } 123 nextarg = NULL; 124 volno = 0; 125 } 126 runshell = 1; 127 getcmd(curdir, cmd, name, &arglist); 128 switch (cmd[0]) { 129 /* 130 * Add elements to the extraction list. 131 */ 132 case 'a': 133 if (strncmp(cmd, "add", strlen(cmd)) != 0) 134 goto bad; 135 ino = dirlookup(name); 136 if (ino == 0) 137 break; 138 if (ino == ROOTINO) 139 dotflag = 1; 140 if (mflag) 141 pathcheck(name); 142 treescan(name, ino, addfile); 143 break; 144 /* 145 * Change working directory. 146 */ 147 case 'c': 148 if (strncmp(cmd, "cd", strlen(cmd)) != 0) 149 goto bad; 150 ino = dirlookup(name); 151 if (ino == 0) 152 break; 153 if (inodetype(ino) == LEAF) { 154 fprintf(stderr, "%s: not a directory\n", name); 155 break; 156 } 157 (void) strcpy(curdir, name); 158 break; 159 /* 160 * Delete elements from the extraction list. 161 */ 162 case 'd': 163 if (strncmp(cmd, "delete", strlen(cmd)) != 0) 164 goto bad; 165 np = lookupname(name); 166 if (np == NULL || (np->e_flags & NEW) == 0) { 167 fprintf(stderr, "%s: not on extraction list\n", name); 168 break; 169 } 170 treescan(name, np->e_ino, deletefile); 171 break; 172 /* 173 * Extract the requested list. 174 */ 175 case 'e': 176 if (strncmp(cmd, "extract", strlen(cmd)) != 0) 177 goto bad; 178 createfiles(); 179 createlinks(); 180 setdirmodes(0); 181 if (dflag) 182 checkrestore(); 183 volno = 0; 184 break; 185 /* 186 * List available commands. 187 */ 188 case 'h': 189 if (strncmp(cmd, "help", strlen(cmd)) != 0) 190 goto bad; 191 case '?': 192 fprintf(stderr, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 193 "Available commands are:\n", 194 "\tls [arg] - list directory\n", 195 "\tcd arg - change directory\n", 196 "\tpwd - print current directory\n", 197 "\tadd [arg] - add `arg' to list of", 198 " files to be extracted\n", 199 "\tdelete [arg] - delete `arg' from", 200 " list of files to be extracted\n", 201 "\textract - extract requested files\n", 202 "\tsetmodes - set modes of requested directories\n", 203 "\tquit or xit - immediately exit program\n", 204 "\twhat - list dump header information\n", 205 "\tverbose - toggle verbose flag", 206 " (useful with ``ls'')\n", 207 "\thelp or `?' - print this list\n", 208 "\tDebug - turn on debugging\n", 209 "If no `arg' is supplied, the current", 210 " directory is used\n"); 211 break; 212 /* 213 * List a directory. 214 */ 215 case 'l': 216 if (strncmp(cmd, "ls", strlen(cmd)) != 0) 217 goto bad; 218 printlist(name, curdir); 219 break; 220 /* 221 * Print current directory. 222 */ 223 case 'p': 224 if (strncmp(cmd, "pwd", strlen(cmd)) != 0) 225 goto bad; 226 if (curdir[1] == '\0') 227 fprintf(stderr, "/\n"); 228 else 229 fprintf(stderr, "%s\n", &curdir[1]); 230 break; 231 /* 232 * Quit. 233 */ 234 case 'q': 235 if (strncmp(cmd, "quit", strlen(cmd)) != 0) 236 goto bad; 237 return; 238 case 'x': 239 if (strncmp(cmd, "xit", strlen(cmd)) != 0) 240 goto bad; 241 return; 242 /* 243 * Toggle verbose mode. 244 */ 245 case 'v': 246 if (strncmp(cmd, "verbose", strlen(cmd)) != 0) 247 goto bad; 248 if (vflag) { 249 fprintf(stderr, "verbose mode off\n"); 250 vflag = 0; 251 break; 252 } 253 fprintf(stderr, "verbose mode on\n"); 254 vflag++; 255 break; 256 /* 257 * Just restore requested directory modes. 258 */ 259 case 's': 260 if (strncmp(cmd, "setmodes", strlen(cmd)) != 0) 261 goto bad; 262 setdirmodes(FORCE); 263 break; 264 /* 265 * Print out dump header information. 266 */ 267 case 'w': 268 if (strncmp(cmd, "what", strlen(cmd)) != 0) 269 goto bad; 270 printdumpinfo(); 271 break; 272 /* 273 * Turn on debugging. 274 */ 275 case 'D': 276 if (strncmp(cmd, "Debug", strlen(cmd)) != 0) 277 goto bad; 278 if (dflag) { 279 fprintf(stderr, "debugging mode off\n"); 280 dflag = 0; 281 break; 282 } 283 fprintf(stderr, "debugging mode on\n"); 284 dflag++; 285 break; 286 /* 287 * Unknown command. 288 */ 289 default: 290 bad: 291 fprintf(stderr, "%s: unknown command; type ? for help\n", cmd); 292 break; 293 } 294 goto loop; 295 } 296 297 /* 298 * Read and parse an interactive command. 299 * The first word on the line is assigned to "cmd". If 300 * there are no arguments on the command line, then "curdir" 301 * is returned as the argument. If there are arguments 302 * on the line they are returned one at a time on each 303 * successive call to getcmd. Each argument is first assigned 304 * to "name". If it does not start with "/" the pathname in 305 * "curdir" is prepended to it. Finally "canon" is called to 306 * eliminate any embedded ".." components. 307 */ 308 static void 309 getcmd(curdir, cmd, name, ap) 310 char *curdir, *cmd, *name; 311 struct arglist *ap; 312 { 313 char *cp; 314 static char input[BUFSIZ]; 315 char output[BUFSIZ]; 316 int globretval; 317 # define rawname input /* save space by reusing input buffer */ 318 319 /* 320 * Check to see if still processing arguments. 321 */ 322 if (ap->argcnt > 0) 323 goto retnext; 324 if (nextarg != NULL) 325 goto getnext; 326 /* 327 * Read a command line and trim off trailing white space. 328 */ 329 do { 330 fprintf(stderr, "%s > ", getprogname()); 331 (void) fflush(stderr); 332 (void) fgets(input, BUFSIZ, terminal); 333 } while (!feof(terminal) && input[0] == '\n'); 334 if (feof(terminal)) { 335 (void) strcpy(cmd, "quit"); 336 return; 337 } 338 for (cp = &input[strlen(input) - 2]; *cp == ' ' || *cp == '\t'; cp--) 339 /* trim off trailing white space and newline */; 340 *++cp = '\0'; 341 /* 342 * Copy the command into "cmd". 343 */ 344 cp = copynext(input, cmd); 345 ap->cmd = cmd; 346 /* 347 * If no argument, use curdir as the default. 348 */ 349 if (*cp == '\0') { 350 (void) strcpy(name, curdir); 351 return; 352 } 353 nextarg = cp; 354 /* 355 * Find the next argument. 356 */ 357 getnext: 358 cp = copynext(nextarg, rawname); 359 if (*cp == '\0') 360 nextarg = NULL; 361 else 362 nextarg = cp; 363 /* 364 * If it is an absolute pathname, canonicalize it and return it. 365 */ 366 if (rawname[0] == '/') { 367 canon(rawname, name); 368 } else { 369 /* 370 * For relative pathnames, prepend the current directory to 371 * it then canonicalize and return it. 372 */ 373 (void) strcpy(output, curdir); 374 (void) strcat(output, "/"); 375 (void) strcat(output, rawname); 376 canon(output, name); 377 } 378 if ((globretval = glob(name, GLOB_ALTDIRFUNC, NULL, &ap->glob)) < 0) { 379 fprintf(stderr, "%s: %s: ", ap->cmd, name); 380 switch (globretval) { 381 case GLOB_NOSPACE: 382 fprintf(stderr, "out of memory\n"); 383 break; 384 case GLOB_NOMATCH: 385 fprintf(stderr, "no filename match.\n"); 386 break; 387 case GLOB_ABORTED: 388 fprintf(stderr, "glob() aborted.\n"); 389 break; 390 default: 391 fprintf(stderr, "unknown error!\n"); 392 break; 393 } 394 } 395 if (ap->glob.gl_pathc == 0) 396 return; 397 ap->freeglob = 1; 398 ap->argcnt = ap->glob.gl_pathc; 399 400 retnext: 401 strcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt]); 402 if (--ap->argcnt == 0) { 403 ap->freeglob = 0; 404 globfree(&ap->glob); 405 } 406 # undef rawname 407 } 408 409 /* 410 * Strip off the next token of the input. 411 */ 412 static char * 413 copynext(input, output) 414 char *input, *output; 415 { 416 char *cp, *bp; 417 char quote; 418 419 for (cp = input; *cp == ' ' || *cp == '\t'; cp++) 420 /* skip to argument */; 421 bp = output; 422 while (*cp != ' ' && *cp != '\t' && *cp != '\0') { 423 /* 424 * Handle back slashes. 425 */ 426 if (*cp == '\\') { 427 if (*++cp == '\0') { 428 fprintf(stderr, 429 "command lines cannot be continued\n"); 430 continue; 431 } 432 *bp++ = *cp++; 433 continue; 434 } 435 /* 436 * The usual unquoted case. 437 */ 438 if (*cp != '\'' && *cp != '"') { 439 *bp++ = *cp++; 440 continue; 441 } 442 /* 443 * Handle single and double quotes. 444 */ 445 quote = *cp++; 446 while (*cp != quote && *cp != '\0') 447 *bp++ = *cp++; 448 if (*cp++ == '\0') { 449 fprintf(stderr, "missing %c\n", quote); 450 cp--; 451 continue; 452 } 453 } 454 *bp = '\0'; 455 return (cp); 456 } 457 458 /* 459 * Canonicalize file names to always start with ``./'' and 460 * remove any imbedded "." and ".." components. 461 */ 462 void 463 canon(rawname, canonname) 464 char *rawname, *canonname; 465 { 466 char *cp, *np; 467 468 if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) 469 (void) strcpy(canonname, ""); 470 else if (rawname[0] == '/') 471 (void) strcpy(canonname, "."); 472 else 473 (void) strcpy(canonname, "./"); 474 (void) strcat(canonname, rawname); 475 /* 476 * Eliminate multiple and trailing '/'s 477 */ 478 for (cp = np = canonname; *np != '\0'; cp++) { 479 *cp = *np++; 480 while (*cp == '/' && *np == '/') 481 np++; 482 } 483 *cp = '\0'; 484 if (*--cp == '/') 485 *cp = '\0'; 486 /* 487 * Eliminate extraneous "." and ".." from pathnames. 488 */ 489 for (np = canonname; *np != '\0'; ) { 490 np++; 491 cp = np; 492 while (*np != '/' && *np != '\0') 493 np++; 494 if (np - cp == 1 && *cp == '.') { 495 cp--; 496 (void) strcpy(cp, np); 497 np = cp; 498 } 499 if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { 500 cp--; 501 while (cp > &canonname[1] && *--cp != '/') 502 /* find beginning of name */; 503 (void) strcpy(cp, np); 504 np = cp; 505 } 506 } 507 } 508 509 /* 510 * Do an "ls" style listing of a directory 511 */ 512 static void 513 printlist(name, basename) 514 char *name; 515 char *basename; 516 { 517 struct afile *fp, *list, *listp; 518 struct direct *dp; 519 struct afile single; 520 RST_DIR *dirp; 521 int entries, len, namelen; 522 char locname[MAXPATHLEN + 1]; 523 524 dp = pathsearch(name); 525 listp = NULL; 526 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 527 (!vflag && dp->d_ino == WINO)) 528 return; 529 if ((dirp = rst_opendir(name)) == NULL) { 530 entries = 1; 531 list = &single; 532 mkentry(name, dp, list); 533 len = strlen(basename) + 1; 534 if (strlen(name) - len > single.len) { 535 freename(single.fname); 536 single.fname = savename(&name[len]); 537 single.len = strlen(single.fname); 538 } 539 } else { 540 entries = 0; 541 while ((dp = rst_readdir(dirp)) != NULL) 542 entries++; 543 rst_closedir(dirp); 544 list = (struct afile *)malloc(entries * sizeof(struct afile)); 545 if (list == NULL) { 546 fprintf(stderr, "ls: out of memory\n"); 547 return; 548 } 549 if ((dirp = rst_opendir(name)) == NULL) 550 panic("directory reopen failed\n"); 551 fprintf(stderr, "%s:\n", name); 552 entries = 0; 553 listp = list; 554 (void) strncpy(locname, name, MAXPATHLEN); 555 (void) strncat(locname, "/", MAXPATHLEN); 556 namelen = strlen(locname); 557 while ((dp = rst_readdir(dirp)) != NULL) { 558 if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) 559 continue; 560 if (!vflag && (dp->d_ino == WINO || 561 strcmp(dp->d_name, ".") == 0 || 562 strcmp(dp->d_name, "..") == 0)) 563 continue; 564 locname[namelen] = '\0'; 565 if (namelen + dp->d_namlen >= MAXPATHLEN) { 566 fprintf(stderr, "%s%s: name exceeds %d char\n", 567 locname, dp->d_name, MAXPATHLEN); 568 } else { 569 (void) strncat(locname, dp->d_name, 570 (int)dp->d_namlen); 571 mkentry(locname, dp, listp++); 572 entries++; 573 } 574 } 575 rst_closedir(dirp); 576 if (entries == 0) { 577 fprintf(stderr, "\n"); 578 free(list); 579 return; 580 } 581 qsort((char *)list, entries, sizeof(struct afile), fcmp); 582 } 583 formatf(list, entries); 584 if (dirp != NULL) { 585 for (fp = listp - 1; fp >= list; fp--) 586 freename(fp->fname); 587 fprintf(stderr, "\n"); 588 free(list); 589 } 590 } 591 592 /* 593 * Read the contents of a directory. 594 */ 595 static void 596 mkentry(name, dp, fp) 597 char *name; 598 struct direct *dp; 599 struct afile *fp; 600 { 601 char *cp; 602 struct entry *np; 603 604 fp->fnum = dp->d_ino; 605 fp->fname = savename(dp->d_name); 606 for (cp = fp->fname; *cp; cp++) 607 if (!vflag && (*cp < ' ' || *cp >= 0177)) 608 *cp = '?'; 609 fp->len = cp - fp->fname; 610 if (dflag && TSTINO(fp->fnum, dumpmap) == 0) 611 fp->prefix = '^'; 612 else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) 613 fp->prefix = '*'; 614 else 615 fp->prefix = ' '; 616 switch(dp->d_type) { 617 618 default: 619 fprintf(stderr, "Warning: undefined file type %d\n", 620 dp->d_type); 621 /* fall through */ 622 case DT_REG: 623 fp->postfix = ' '; 624 break; 625 626 case DT_LNK: 627 fp->postfix = '@'; 628 break; 629 630 case DT_FIFO: 631 case DT_SOCK: 632 fp->postfix = '='; 633 break; 634 635 case DT_CHR: 636 case DT_BLK: 637 fp->postfix = '#'; 638 break; 639 640 case DT_WHT: 641 fp->postfix = '%'; 642 break; 643 644 case DT_UNKNOWN: 645 case DT_DIR: 646 if (inodetype(dp->d_ino) == NODE) 647 fp->postfix = '/'; 648 else 649 fp->postfix = ' '; 650 break; 651 } 652 return; 653 } 654 655 /* 656 * Print out a pretty listing of a directory 657 */ 658 static void 659 formatf(list, nentry) 660 struct afile *list; 661 int nentry; 662 { 663 struct afile *fp, *endlist; 664 int width, bigino, haveprefix, havepostfix; 665 int i, j, w, precision, columns, lines; 666 667 width = 0; 668 haveprefix = 0; 669 havepostfix = 0; 670 precision = 0; 671 bigino = ROOTINO; 672 endlist = &list[nentry]; 673 for (fp = &list[0]; fp < endlist; fp++) { 674 if (bigino < fp->fnum) 675 bigino = fp->fnum; 676 if (width < fp->len) 677 width = fp->len; 678 if (fp->prefix != ' ') 679 haveprefix = 1; 680 if (fp->postfix != ' ') 681 havepostfix = 1; 682 } 683 if (haveprefix) 684 width++; 685 if (havepostfix) 686 width++; 687 if (vflag) { 688 for (precision = 0, i = bigino; i > 0; i /= 10) 689 precision++; 690 width += precision + 1; 691 } 692 width++; 693 columns = 81 / width; 694 if (columns == 0) 695 columns = 1; 696 lines = (nentry + columns - 1) / columns; 697 for (i = 0; i < lines; i++) { 698 for (j = 0; j < columns; j++) { 699 fp = &list[j * lines + i]; 700 if (vflag) { 701 fprintf(stderr, "%*d ", precision, fp->fnum); 702 fp->len += precision + 1; 703 } 704 if (haveprefix) { 705 putc(fp->prefix, stderr); 706 fp->len++; 707 } 708 fprintf(stderr, "%s", fp->fname); 709 if (havepostfix) { 710 putc(fp->postfix, stderr); 711 fp->len++; 712 } 713 if (fp + lines >= endlist) { 714 fprintf(stderr, "\n"); 715 break; 716 } 717 for (w = fp->len; w < width; w++) 718 putc(' ', stderr); 719 } 720 } 721 } 722 723 /* 724 * Skip over directory entries that are not on the tape 725 * 726 * First have to get definition of a dirent. 727 */ 728 #undef DIRBLKSIZ 729 #include <dirent.h> 730 #undef d_ino 731 732 struct dirent * 733 glob_readdir(dirp) 734 RST_DIR *dirp; 735 { 736 struct direct *dp; 737 static struct dirent adirent; 738 739 while ((dp = rst_readdir(dirp)) != NULL) { 740 if (!vflag && dp->d_ino == WINO) 741 continue; 742 if (dflag || TSTINO(dp->d_ino, dumpmap)) 743 break; 744 } 745 if (dp == NULL) 746 return (NULL); 747 adirent.d_fileno = dp->d_ino; 748 adirent.d_namlen = dp->d_namlen; 749 memmove(adirent.d_name, dp->d_name, dp->d_namlen + 1); 750 return (&adirent); 751 } 752 753 /* 754 * Return st_mode information in response to stat or lstat calls 755 */ 756 static int 757 glob_stat(name, stp) 758 const char *name; 759 struct stat *stp; 760 { 761 struct direct *dp; 762 763 dp = pathsearch(name); 764 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 765 (!vflag && dp->d_ino == WINO)) 766 return (-1); 767 if (inodetype(dp->d_ino) == NODE) 768 stp->st_mode = S_IFDIR; 769 else 770 stp->st_mode = S_IFREG; 771 return (0); 772 } 773 774 /* 775 * Comparison routine for qsort. 776 */ 777 static int 778 fcmp(f1, f2) 779 const void *f1, *f2; 780 { 781 return (strcmp(((struct afile *)f1)->fname, 782 ((struct afile *)f2)->fname)); 783 } 784 785 /* 786 * respond to interrupts 787 */ 788 void 789 onintr(signo) 790 int signo; 791 { 792 if (command == 'i' && runshell) 793 longjmp(reset, 1); 794 if (reply("restore interrupted, continue") == FAIL) 795 exit(1); 796 } 797