1 /* $OpenBSD: interactive.c,v 1.12 2001/07/07 18:26:19 deraadt Exp $ */ 2 /* $NetBSD: interactive.c,v 1.10 1997/03/19 08:42:52 lukem Exp $ */ 3 4 /* 5 * Copyright (c) 1985, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 #if 0 39 static char sccsid[] = "@(#)interactive.c 8.3 (Berkeley) 9/13/94"; 40 #else 41 static char rcsid[] = "$OpenBSD: interactive.c,v 1.12 2001/07/07 18:26:19 deraadt Exp $"; 42 #endif 43 #endif /* not lint */ 44 45 #include <sys/param.h> 46 #include <sys/time.h> 47 #include <sys/stat.h> 48 49 #include <ufs/ffs/fs.h> 50 #include <ufs/ufs/dinode.h> 51 #include <ufs/ufs/dir.h> 52 #include <protocols/dumprestore.h> 53 54 #include <setjmp.h> 55 #include <glob.h> 56 #include <stdio.h> 57 #include <errno.h> 58 #include <stdlib.h> 59 #include <string.h> 60 61 #include "restore.h" 62 #include "extern.h" 63 64 #define round(a, b) (((a) + (b) - 1) / (b) * (b)) 65 66 /* 67 * Things to handle interruptions. 68 */ 69 static int runshell; 70 static jmp_buf reset; 71 static char *nextarg = NULL; 72 73 /* 74 * Structure and routines associated with listing directories. 75 */ 76 struct afile { 77 ino_t fnum; /* inode number of file */ 78 char *fname; /* file name */ 79 short len; /* name length */ 80 char prefix; /* prefix character */ 81 char postfix; /* postfix character */ 82 }; 83 struct arglist { 84 int freeglob; /* glob structure needs to be freed */ 85 int argcnt; /* next globbed argument to return */ 86 glob_t glob; /* globbing information */ 87 char *cmd; /* the current command */ 88 }; 89 90 static char *copynext __P((char *, char *)); 91 static int fcmp __P((const void *, const void *)); 92 static void formatf __P((struct afile *, int)); 93 static void getcmd __P((char *, char *, char *, struct arglist *)); 94 struct dirent *glob_readdir __P((RST_DIR *dirp)); 95 static int glob_stat __P((const char *, struct stat *)); 96 static void mkentry __P((char *, struct direct *, struct afile *)); 97 static void printlist __P((char *, char *)); 98 99 /* 100 * Read and execute commands from the terminal. 101 */ 102 void 103 runcmdshell() 104 { 105 register struct entry *np; 106 ino_t ino; 107 struct arglist arglist; 108 char curdir[MAXPATHLEN]; 109 char name[MAXPATHLEN]; 110 char cmd[BUFSIZ]; 111 112 arglist.freeglob = 0; 113 arglist.argcnt = 0; 114 arglist.glob.gl_flags = GLOB_ALTDIRFUNC; 115 arglist.glob.gl_opendir = (void *)rst_opendir; 116 arglist.glob.gl_readdir = (void *)glob_readdir; 117 arglist.glob.gl_closedir = (void *)rst_closedir; 118 arglist.glob.gl_lstat = glob_stat; 119 arglist.glob.gl_stat = glob_stat; 120 canon("/", curdir); 121 loop: 122 if (setjmp(reset) != 0) { 123 if (arglist.freeglob != 0) { 124 arglist.freeglob = 0; 125 arglist.argcnt = 0; 126 globfree(&arglist.glob); 127 } 128 nextarg = NULL; 129 volno = 0; 130 } 131 runshell = 1; 132 getcmd(curdir, cmd, name, &arglist); 133 switch (cmd[0]) { 134 /* 135 * Add elements to the extraction list. 136 */ 137 case 'a': 138 if (strncmp(cmd, "add", strlen(cmd)) != 0) 139 goto bad; 140 ino = dirlookup(name); 141 if (ino == 0) 142 break; 143 if (mflag) 144 pathcheck(name); 145 treescan(name, ino, addfile); 146 break; 147 /* 148 * Change working directory. 149 */ 150 case 'c': 151 if (strncmp(cmd, "cd", strlen(cmd)) != 0) 152 goto bad; 153 ino = dirlookup(name); 154 if (ino == 0) 155 break; 156 if (inodetype(ino) == LEAF) { 157 fprintf(stderr, "%s: not a directory\n", name); 158 break; 159 } 160 (void)strlcpy(curdir, name, sizeof curdir); 161 break; 162 /* 163 * Delete elements from the extraction list. 164 */ 165 case 'd': 166 if (strncmp(cmd, "delete", strlen(cmd)) != 0) 167 goto bad; 168 np = lookupname(name); 169 if (np == NULL || (np->e_flags & NEW) == 0) { 170 fprintf(stderr, "%s: not on extraction list\n", name); 171 break; 172 } 173 treescan(name, np->e_ino, deletefile); 174 break; 175 /* 176 * Extract the requested list. 177 */ 178 case 'e': 179 if (strncmp(cmd, "extract", strlen(cmd)) != 0) 180 goto bad; 181 createfiles(); 182 createlinks(); 183 setdirmodes(0); 184 if (dflag) 185 checkrestore(); 186 volno = 0; 187 break; 188 /* 189 * List available commands. 190 */ 191 case 'h': 192 if (strncmp(cmd, "help", strlen(cmd)) != 0) 193 goto bad; 194 case '?': 195 fprintf(stderr, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 196 "Available commands are:\n", 197 "\tls [arg] - list directory\n", 198 "\tcd arg - change directory\n", 199 "\tpwd - print current directory\n", 200 "\tadd [arg] - add `arg' to list of", 201 " files to be extracted\n", 202 "\tdelete [arg] - delete `arg' from", 203 " list of files to be extracted\n", 204 "\textract - extract requested files\n", 205 "\tsetmodes - set modes of requested directories\n", 206 "\tquit - immediately exit program\n", 207 "\twhat - list dump header information\n", 208 "\tverbose - toggle verbose flag", 209 " (useful with ``ls'')\n", 210 "\thelp or `?' - print this list\n", 211 "If no `arg' is supplied, the current", 212 " directory is used\n"); 213 break; 214 /* 215 * List a directory. 216 */ 217 case 'l': 218 if (strncmp(cmd, "ls", strlen(cmd)) != 0) 219 goto bad; 220 printlist(name, curdir); 221 break; 222 /* 223 * Print current directory. 224 */ 225 case 'p': 226 if (strncmp(cmd, "pwd", strlen(cmd)) != 0) 227 goto bad; 228 if (curdir[1] == '\0') 229 fprintf(stderr, "/\n"); 230 else 231 fprintf(stderr, "%s\n", &curdir[1]); 232 break; 233 /* 234 * Quit. 235 */ 236 case 'q': 237 if (strncmp(cmd, "quit", strlen(cmd)) != 0) 238 goto bad; 239 return; 240 case 'x': 241 if (strncmp(cmd, "xit", strlen(cmd)) != 0) 242 goto bad; 243 return; 244 /* 245 * Toggle verbose mode. 246 */ 247 case 'v': 248 if (strncmp(cmd, "verbose", strlen(cmd)) != 0) 249 goto bad; 250 if (vflag) { 251 fprintf(stderr, "verbose mode off\n"); 252 vflag = 0; 253 break; 254 } 255 fprintf(stderr, "verbose mode on\n"); 256 vflag++; 257 break; 258 /* 259 * Just restore requested directory modes. 260 */ 261 case 's': 262 if (strncmp(cmd, "setmodes", strlen(cmd)) != 0) 263 goto bad; 264 setdirmodes(FORCE); 265 break; 266 /* 267 * Print out dump header information. 268 */ 269 case 'w': 270 if (strncmp(cmd, "what", strlen(cmd)) != 0) 271 goto bad; 272 printdumpinfo(); 273 break; 274 /* 275 * Turn on debugging. 276 */ 277 case 'D': 278 if (strncmp(cmd, "Debug", strlen(cmd)) != 0) 279 goto bad; 280 if (dflag) { 281 fprintf(stderr, "debugging mode off\n"); 282 dflag = 0; 283 break; 284 } 285 fprintf(stderr, "debugging mode on\n"); 286 dflag++; 287 break; 288 /* 289 * Unknown command. 290 */ 291 default: 292 bad: 293 fprintf(stderr, "%s: unknown command; type ? for help\n", cmd); 294 break; 295 } 296 goto loop; 297 } 298 299 /* 300 * Read and parse an interactive command. 301 * The first word on the line is assigned to "cmd". If 302 * there are no arguments on the command line, then "curdir" 303 * is returned as the argument. If there are arguments 304 * on the line they are returned one at a time on each 305 * successive call to getcmd. Each argument is first assigned 306 * to "name". If it does not start with "/" the pathname in 307 * "curdir" is prepended to it. Finally "canon" is called to 308 * eliminate any embedded ".." components. 309 */ 310 static void 311 getcmd(curdir, cmd, name, ap) 312 char *curdir, *cmd, *name; 313 struct arglist *ap; 314 { 315 register char *cp; 316 static char input[BUFSIZ]; 317 char output[BUFSIZ]; 318 # define rawname input /* save space by reusing input buffer */ 319 int globretval; 320 321 /* 322 * Check to see if still processing arguments. 323 */ 324 if (ap->argcnt > 0) 325 goto retnext; 326 if (nextarg != NULL) 327 goto getnext; 328 /* 329 * Read a command line and trim off trailing white space. 330 */ 331 do { 332 (void)fprintf(stderr, "%s > ", __progname); 333 (void)fflush(stderr); 334 (void)fgets(input, BUFSIZ, terminal); 335 } while (!feof(terminal) && input[0] == '\n'); 336 if (feof(terminal)) { 337 (void)strcpy(cmd, "quit"); 338 return; 339 } 340 for (cp = &input[strlen(input) - 2]; *cp == ' ' || *cp == '\t'; cp--) 341 /* trim off trailing white space and newline */; 342 *++cp = '\0'; 343 /* 344 * Copy the command into "cmd". 345 */ 346 cp = copynext(input, cmd); 347 ap->cmd = cmd; 348 /* 349 * If no argument, use curdir as the default. 350 */ 351 if (*cp == '\0') { 352 (void)strlcpy(name, curdir, MAXPATHLEN); 353 return; 354 } 355 nextarg = cp; 356 /* 357 * Find the next argument. 358 */ 359 getnext: 360 cp = copynext(nextarg, rawname); 361 if (*cp == '\0') 362 nextarg = NULL; 363 else 364 nextarg = cp; 365 /* 366 * If it is an absolute pathname, canonicalize it and return it. 367 */ 368 if (rawname[0] == '/') { 369 canon(rawname, name); 370 } else { 371 /* 372 * For relative pathnames, prepend the current directory to 373 * it then canonicalize and return it. 374 */ 375 snprintf(output, sizeof(output), "%s/%s", curdir, rawname); 376 canon(output, name); 377 } 378 if ((globretval = glob(name, GLOB_ALTDIRFUNC | GLOB_NOESCAPE, 379 NULL, &ap->glob)) < 0) { 380 fprintf(stderr, "%s: %s: ", ap->cmd, name); 381 switch (globretval) { 382 case GLOB_NOSPACE: 383 fprintf(stderr, "out of memory\n"); 384 break; 385 case GLOB_NOMATCH: 386 fprintf(stderr, "no filename match.\n"); 387 break; 388 case GLOB_ABORTED: 389 fprintf(stderr, "glob() aborted.\n"); 390 break; 391 default: 392 fprintf(stderr, "unknown error!\n"); 393 break; 394 } 395 } 396 397 if (ap->glob.gl_pathc == 0) 398 return; 399 ap->freeglob = 1; 400 ap->argcnt = ap->glob.gl_pathc; 401 402 retnext: 403 strlcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt], 404 MAXPATHLEN); 405 if (--ap->argcnt == 0) { 406 ap->freeglob = 0; 407 globfree(&ap->glob); 408 } 409 # undef rawname 410 } 411 412 /* 413 * Strip off the next token of the input. 414 */ 415 static char * 416 copynext(input, output) 417 char *input, *output; 418 { 419 register char *cp, *bp; 420 char quote; 421 422 for (cp = input; *cp == ' ' || *cp == '\t'; cp++) 423 /* skip to argument */; 424 bp = output; 425 while (*cp != ' ' && *cp != '\t' && *cp != '\0') { 426 /* 427 * Handle back slashes. 428 */ 429 if (*cp == '\\') { 430 if (*++cp == '\0') { 431 fprintf(stderr, 432 "command lines cannot be continued\n"); 433 continue; 434 } 435 *bp++ = *cp++; 436 continue; 437 } 438 /* 439 * The usual unquoted case. 440 */ 441 if (*cp != '\'' && *cp != '"') { 442 *bp++ = *cp++; 443 continue; 444 } 445 /* 446 * Handle single and double quotes. 447 */ 448 quote = *cp++; 449 while (*cp != quote && *cp != '\0') 450 *bp++ = *cp++; 451 if (*cp++ == '\0') { 452 fprintf(stderr, "missing %c\n", quote); 453 cp--; 454 continue; 455 } 456 } 457 *bp = '\0'; 458 return (cp); 459 } 460 461 /* 462 * Canonicalize file names to always start with ``./'' and 463 * remove any imbedded "." and ".." components. 464 */ 465 void 466 canon(rawname, canonname) 467 char *rawname, *canonname; 468 { 469 register char *cp, *np; 470 471 if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) 472 (void)strcpy(canonname, ""); 473 else if (rawname[0] == '/') 474 (void)strcpy(canonname, "."); 475 else 476 (void)strcpy(canonname, "./"); 477 (void)strlcat(canonname, rawname, MAXPATHLEN); 478 /* 479 * Eliminate multiple and trailing '/'s 480 */ 481 for (cp = np = canonname; *np != '\0'; cp++) { 482 *cp = *np++; 483 while (*cp == '/' && *np == '/') 484 np++; 485 } 486 *cp = '\0'; 487 if (*--cp == '/') 488 *cp = '\0'; 489 /* 490 * Eliminate extraneous "." and ".." from pathnames. 491 */ 492 for (np = canonname; *np != '\0'; ) { 493 np++; 494 cp = np; 495 while (*np != '/' && *np != '\0') 496 np++; 497 if (np - cp == 1 && *cp == '.') { 498 cp--; 499 (void)strcpy(cp, np); 500 np = cp; 501 } 502 if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { 503 cp--; 504 while (cp > &canonname[1] && *--cp != '/') 505 /* find beginning of name */; 506 (void)strcpy(cp, np); 507 np = cp; 508 } 509 } 510 } 511 512 /* 513 * Do an "ls" style listing of a directory 514 */ 515 static void 516 printlist(name, basename) 517 char *name; 518 char *basename; 519 { 520 register struct afile *fp, *list, *listp = NULL; 521 register struct direct *dp; 522 struct afile single; 523 RST_DIR *dirp; 524 int entries, len, namelen; 525 char locname[MAXPATHLEN]; 526 527 dp = pathsearch(name); 528 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 529 (!vflag && dp->d_ino == WINO)) 530 return; 531 if ((dirp = rst_opendir(name)) == NULL) { 532 entries = 1; 533 list = &single; 534 mkentry(name, dp, list); 535 len = strlen(basename) + 1; 536 if (strlen(name) - len > single.len) { 537 freename(single.fname); 538 single.fname = savename(&name[len]); 539 single.len = strlen(single.fname); 540 } 541 } else { 542 entries = 0; 543 while ((dp = rst_readdir(dirp))) 544 entries++; 545 rst_closedir(dirp); 546 list = (struct afile *)malloc(entries * sizeof(struct afile)); 547 if (list == NULL) { 548 fprintf(stderr, "ls: out of memory\n"); 549 return; 550 } 551 if ((dirp = rst_opendir(name)) == NULL) 552 panic("directory reopen failed\n"); 553 fprintf(stderr, "%s:\n", name); 554 entries = 0; 555 listp = list; 556 namelen = snprintf(locname, sizeof(locname), "%s/", name); 557 if (namelen >= sizeof(locname)) 558 namelen = sizeof(locname) - 1; 559 while ((dp = rst_readdir(dirp))) { 560 if (dp == NULL) 561 break; 562 if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) 563 continue; 564 if (!vflag && (dp->d_ino == WINO || 565 strcmp(dp->d_name, ".") == 0 || 566 strcmp(dp->d_name, "..") == 0)) 567 continue; 568 locname[namelen] = '\0'; 569 if (namelen + dp->d_namlen >= MAXPATHLEN) { 570 fprintf(stderr, "%s%s: name exceeds %d char\n", 571 locname, dp->d_name, MAXPATHLEN); 572 } else { 573 (void)strncat(locname, dp->d_name, 574 (int)dp->d_namlen); 575 mkentry(locname, dp, listp++); 576 entries++; 577 } 578 } 579 rst_closedir(dirp); 580 if (entries == 0) { 581 fprintf(stderr, "\n"); 582 free(list); 583 return; 584 } 585 qsort((char *)list, entries, sizeof(struct afile), fcmp); 586 } 587 formatf(list, entries); 588 if (dirp != NULL) { 589 for (fp = listp - 1; fp >= list; fp--) 590 freename(fp->fname); 591 fprintf(stderr, "\n"); 592 free(list); 593 } 594 } 595 596 /* 597 * Read the contents of a directory. 598 */ 599 static void 600 mkentry(name, dp, fp) 601 char *name; 602 struct direct *dp; 603 register struct afile *fp; 604 { 605 char *cp; 606 struct entry *np; 607 608 fp->fnum = dp->d_ino; 609 fp->fname = savename(dp->d_name); 610 for (cp = fp->fname; *cp; cp++) 611 if (!vflag && (*cp < ' ' || *cp >= 0177)) 612 *cp = '?'; 613 fp->len = cp - fp->fname; 614 if (dflag && TSTINO(fp->fnum, dumpmap) == 0) 615 fp->prefix = '^'; 616 else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) 617 fp->prefix = '*'; 618 else 619 fp->prefix = ' '; 620 switch(dp->d_type) { 621 622 default: 623 fprintf(stderr, "Warning: undefined file type %d\n", 624 dp->d_type); 625 /* fall through */ 626 case DT_REG: 627 fp->postfix = ' '; 628 break; 629 630 case DT_LNK: 631 fp->postfix = '@'; 632 break; 633 634 case DT_FIFO: 635 case DT_SOCK: 636 fp->postfix = '='; 637 break; 638 639 case DT_CHR: 640 case DT_BLK: 641 fp->postfix = '#'; 642 break; 643 644 case DT_WHT: 645 fp->postfix = '%'; 646 break; 647 648 case DT_UNKNOWN: 649 case DT_DIR: 650 if (inodetype(dp->d_ino) == NODE) 651 fp->postfix = '/'; 652 else 653 fp->postfix = ' '; 654 break; 655 } 656 return; 657 } 658 659 /* 660 * Print out a pretty listing of a directory 661 */ 662 static void 663 formatf(list, nentry) 664 register struct afile *list; 665 int nentry; 666 { 667 register struct afile *fp, *endlist; 668 int width, bigino, haveprefix, havepostfix; 669 int i, j, w, precision = 0, columns, lines; 670 671 width = 0; 672 haveprefix = 0; 673 havepostfix = 0; 674 bigino = ROOTINO; 675 endlist = &list[nentry]; 676 for (fp = &list[0]; fp < endlist; fp++) { 677 if (bigino < fp->fnum) 678 bigino = fp->fnum; 679 if (width < fp->len) 680 width = fp->len; 681 if (fp->prefix != ' ') 682 haveprefix = 1; 683 if (fp->postfix != ' ') 684 havepostfix = 1; 685 } 686 if (haveprefix) 687 width++; 688 if (havepostfix) 689 width++; 690 if (vflag) { 691 for (precision = 0, i = bigino; i > 0; i /= 10) 692 precision++; 693 width += precision + 1; 694 } 695 width++; 696 columns = 81 / width; 697 if (columns == 0) 698 columns = 1; 699 lines = (nentry + columns - 1) / columns; 700 for (i = 0; i < lines; i++) { 701 for (j = 0; j < columns; j++) { 702 fp = &list[j * lines + i]; 703 if (vflag) { 704 fprintf(stderr, "%*d ", precision, fp->fnum); 705 fp->len += precision + 1; 706 } 707 if (haveprefix) { 708 putc(fp->prefix, stderr); 709 fp->len++; 710 } 711 fprintf(stderr, "%s", fp->fname); 712 if (havepostfix) { 713 putc(fp->postfix, stderr); 714 fp->len++; 715 } 716 if (fp + lines >= endlist) { 717 fprintf(stderr, "\n"); 718 break; 719 } 720 for (w = fp->len; w < width; w++) 721 putc(' ', stderr); 722 } 723 } 724 } 725 726 /* 727 * Skip over directory entries that are not on the tape 728 * 729 * First have to get definition of a dirent. 730 */ 731 #undef DIRBLKSIZ 732 #include <dirent.h> 733 #undef d_ino 734 735 struct dirent * 736 glob_readdir(dirp) 737 RST_DIR *dirp; 738 { 739 struct direct *dp; 740 static struct dirent adirent; 741 742 while ((dp = rst_readdir(dirp)) != NULL) { 743 if (!vflag && dp->d_ino == WINO) 744 continue; 745 if (dflag || TSTINO(dp->d_ino, dumpmap)) 746 break; 747 } 748 if (dp == NULL) 749 return (NULL); 750 adirent.d_fileno = dp->d_ino; 751 adirent.d_namlen = dp->d_namlen; 752 memcpy(adirent.d_name, dp->d_name, dp->d_namlen + 1); 753 return (&adirent); 754 } 755 756 /* 757 * Return st_mode information in response to stat or lstat calls 758 */ 759 static int 760 glob_stat(name, stp) 761 const char *name; 762 struct stat *stp; 763 { 764 register struct direct *dp; 765 766 dp = pathsearch(name); 767 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 768 (!vflag && dp->d_ino == WINO)) 769 return (-1); 770 if (inodetype(dp->d_ino) == NODE) 771 stp->st_mode = S_IFDIR; 772 else 773 stp->st_mode = S_IFREG; 774 return (0); 775 } 776 777 /* 778 * Comparison routine for qsort. 779 */ 780 static int 781 fcmp(f1, f2) 782 register const void *f1, *f2; 783 { 784 return (strcmp(((struct afile *)f1)->fname, 785 ((struct afile *)f2)->fname)); 786 } 787 788 /* 789 * respond to interrupts 790 */ 791 void 792 onintr(signo) 793 int signo; 794 { 795 int save_errno = errno; 796 797 if (command == 'i' && runshell) 798 longjmp(reset, 1); /* XXX signal/longjmp reentrancy */ 799 if (reply("restore interrupted, continue") == FAIL) /* XXX signal race */ 800 _exit(1); 801 errno = save_errno; 802 } 803