1 /* $OpenBSD: interactive.c,v 1.19 2003/07/28 06:13:26 tedu 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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static char sccsid[] = "@(#)interactive.c 8.3 (Berkeley) 9/13/94"; 36 #else 37 static const char rcsid[] = "$OpenBSD: interactive.c,v 1.19 2003/07/28 06:13:26 tedu 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/ffs/fs.h> 46 #include <ufs/ufs/dinode.h> 47 #include <ufs/ufs/dir.h> 48 #include <protocols/dumprestore.h> 49 50 #include <setjmp.h> 51 #include <glob.h> 52 #include <stdio.h> 53 #include <errno.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <unistd.h> 57 58 #include "restore.h" 59 #include "extern.h" 60 61 #define round(a, b) (((a) + (b) - 1) / (b) * (b)) 62 63 /* 64 * Things to handle interruptions. 65 */ 66 static int runshell; 67 static jmp_buf reset; 68 static char *nextarg = NULL; 69 70 /* 71 * Structure and routines associated with listing directories. 72 */ 73 struct afile { 74 ino_t fnum; /* inode number of file */ 75 char *fname; /* file name */ 76 short len; /* name length */ 77 char prefix; /* prefix character */ 78 char postfix; /* postfix character */ 79 }; 80 struct arglist { 81 int freeglob; /* glob structure needs to be freed */ 82 int argcnt; /* next globbed argument to return */ 83 glob_t glob; /* globbing information */ 84 char *cmd; /* the current command */ 85 }; 86 87 static char *copynext(char *, char *); 88 static int fcmp(const void *, const void *); 89 static void formatf(struct afile *, int); 90 static void getcmd(char *, char *, size_t, char *, size_t, struct arglist *); 91 struct dirent *glob_readdir(RST_DIR *dirp); 92 static int glob_stat(const char *, struct stat *); 93 static void mkentry(char *, struct direct *, struct afile *); 94 static void printlist(char *, char *); 95 96 /* 97 * Read and execute commands from the terminal. 98 */ 99 void 100 runcmdshell() 101 { 102 struct entry *np; 103 ino_t ino; 104 struct arglist arglist; 105 char curdir[MAXPATHLEN]; 106 char name[MAXPATHLEN]; 107 char cmd[BUFSIZ]; 108 109 arglist.freeglob = 0; 110 arglist.argcnt = 0; 111 arglist.glob.gl_flags = GLOB_ALTDIRFUNC; 112 arglist.glob.gl_opendir = (void *)rst_opendir; 113 arglist.glob.gl_readdir = (void *)glob_readdir; 114 arglist.glob.gl_closedir = (void *)rst_closedir; 115 arglist.glob.gl_lstat = glob_stat; 116 arglist.glob.gl_stat = glob_stat; 117 canon("/", curdir, sizeof curdir); 118 loop: 119 if (setjmp(reset) != 0) { 120 if (arglist.freeglob != 0) { 121 arglist.freeglob = 0; 122 arglist.argcnt = 0; 123 globfree(&arglist.glob); 124 } 125 nextarg = NULL; 126 volno = 0; 127 } 128 runshell = 1; 129 getcmd(curdir, cmd, sizeof cmd, name, sizeof name, &arglist); 130 switch (cmd[0]) { 131 /* 132 * Add elements to the extraction list. 133 */ 134 case 'a': 135 if (strncmp(cmd, "add", strlen(cmd)) != 0) 136 goto bad; 137 ino = dirlookup(name); 138 if (ino == 0) 139 break; 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)strlcpy(curdir, name, sizeof curdir); 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", 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 - 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 "If no `arg' is supplied, the current", 209 " directory is used\n"); 210 break; 211 /* 212 * List a directory. 213 */ 214 case 'l': 215 if (strncmp(cmd, "ls", strlen(cmd)) != 0) 216 goto bad; 217 printlist(name, curdir); 218 break; 219 /* 220 * Print current directory. 221 */ 222 case 'p': 223 if (strncmp(cmd, "pwd", strlen(cmd)) != 0) 224 goto bad; 225 if (curdir[1] == '\0') 226 fprintf(stderr, "/\n"); 227 else 228 fprintf(stderr, "%s\n", &curdir[1]); 229 break; 230 /* 231 * Quit. 232 */ 233 case 'q': 234 if (strncmp(cmd, "quit", strlen(cmd)) != 0) 235 goto bad; 236 return; 237 case 'x': 238 if (strncmp(cmd, "xit", strlen(cmd)) != 0) 239 goto bad; 240 return; 241 /* 242 * Toggle verbose mode. 243 */ 244 case 'v': 245 if (strncmp(cmd, "verbose", strlen(cmd)) != 0) 246 goto bad; 247 if (vflag) { 248 fprintf(stderr, "verbose mode off\n"); 249 vflag = 0; 250 break; 251 } 252 fprintf(stderr, "verbose mode on\n"); 253 vflag++; 254 break; 255 /* 256 * Just restore requested directory modes. 257 */ 258 case 's': 259 if (strncmp(cmd, "setmodes", strlen(cmd)) != 0) 260 goto bad; 261 setdirmodes(FORCE); 262 break; 263 /* 264 * Print out dump header information. 265 */ 266 case 'w': 267 if (strncmp(cmd, "what", strlen(cmd)) != 0) 268 goto bad; 269 printdumpinfo(); 270 break; 271 /* 272 * Turn on debugging. 273 */ 274 case 'D': 275 if (strncmp(cmd, "Debug", strlen(cmd)) != 0) 276 goto bad; 277 if (dflag) { 278 fprintf(stderr, "debugging mode off\n"); 279 dflag = 0; 280 break; 281 } 282 fprintf(stderr, "debugging mode on\n"); 283 dflag++; 284 break; 285 /* 286 * Unknown command. 287 */ 288 default: 289 bad: 290 fprintf(stderr, "%s: unknown command; type ? for help\n", cmd); 291 break; 292 } 293 goto loop; 294 } 295 296 /* 297 * Read and parse an interactive command. 298 * The first word on the line is assigned to "cmd". If 299 * there are no arguments on the command line, then "curdir" 300 * is returned as the argument. If there are arguments 301 * on the line they are returned one at a time on each 302 * successive call to getcmd. Each argument is first assigned 303 * to "name". If it does not start with "/" the pathname in 304 * "curdir" is prepended to it. Finally "canon" is called to 305 * eliminate any embedded ".." components. 306 */ 307 static void 308 getcmd(curdir, cmd, cmdlen, name, namelen, ap) 309 char *curdir, *cmd; 310 size_t cmdlen; 311 char *name; 312 size_t namelen; 313 struct arglist *ap; 314 { 315 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)strlcpy(cmd, "quit", cmdlen); 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, namelen); 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, namelen); 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 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, canonnamelen) 467 char *rawname, *canonname; 468 size_t canonnamelen; 469 { 470 char *cp, *np; 471 472 if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) 473 (void)strlcpy(canonname, "", canonnamelen); 474 else if (rawname[0] == '/') 475 (void)strlcpy(canonname, ".", canonnamelen); 476 else 477 (void)strlcpy(canonname, "./", canonnamelen); 478 (void)strlcat(canonname, rawname, canonnamelen); 479 /* 480 * Eliminate multiple and trailing '/'s 481 */ 482 for (cp = np = canonname; *np != '\0'; cp++) { 483 *cp = *np++; 484 while (*cp == '/' && *np == '/') 485 np++; 486 } 487 *cp = '\0'; 488 if (*--cp == '/') 489 *cp = '\0'; 490 /* 491 * Eliminate extraneous "." and ".." from pathnames. 492 */ 493 for (np = canonname; *np != '\0'; ) { 494 np++; 495 cp = np; 496 while (*np != '/' && *np != '\0') 497 np++; 498 if (np - cp == 1 && *cp == '.') { 499 cp--; 500 (void)strlcpy(cp, np, canonname + canonnamelen - cp); 501 np = cp; 502 } 503 if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { 504 cp--; 505 while (cp > &canonname[1] && *--cp != '/') 506 /* find beginning of name */; 507 (void)strlcpy(cp, np, canonname + canonnamelen - cp); 508 np = cp; 509 } 510 } 511 } 512 513 /* 514 * Do an "ls" style listing of a directory 515 */ 516 static void 517 printlist(name, basename) 518 char *name; 519 char *basename; 520 { 521 struct afile *fp, *list, *listp = NULL; 522 struct direct *dp; 523 struct afile single; 524 RST_DIR *dirp; 525 int entries, len, namelen; 526 char locname[MAXPATHLEN]; 527 528 dp = pathsearch(name); 529 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 530 (!vflag && dp->d_ino == WINO)) 531 return; 532 if ((dirp = rst_opendir(name)) == NULL) { 533 entries = 1; 534 list = &single; 535 mkentry(name, dp, list); 536 len = strlen(basename) + 1; 537 if (strlen(name) - len > single.len) { 538 freename(single.fname); 539 single.fname = savename(&name[len]); 540 single.len = strlen(single.fname); 541 } 542 } else { 543 entries = 0; 544 while ((dp = rst_readdir(dirp))) 545 entries++; 546 rst_closedir(dirp); 547 list = (struct afile *)malloc(entries * sizeof(struct afile)); 548 if (list == NULL) { 549 fprintf(stderr, "ls: out of memory\n"); 550 return; 551 } 552 if ((dirp = rst_opendir(name)) == NULL) 553 panic("directory reopen failed\n"); 554 fprintf(stderr, "%s:\n", name); 555 entries = 0; 556 listp = list; 557 namelen = snprintf(locname, sizeof(locname), "%s/", name); 558 if (namelen >= sizeof(locname)) 559 namelen = sizeof(locname) - 1; 560 while ((dp = rst_readdir(dirp))) { 561 if (dp == NULL) 562 break; 563 if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) 564 continue; 565 if (!vflag && (dp->d_ino == WINO || 566 strcmp(dp->d_name, ".") == 0 || 567 strcmp(dp->d_name, "..") == 0)) 568 continue; 569 locname[namelen] = '\0'; 570 if (namelen + dp->d_namlen >= MAXPATHLEN) { 571 fprintf(stderr, "%s%s: name exceeds %d char\n", 572 locname, dp->d_name, MAXPATHLEN); 573 } else { 574 (void)strncat(locname, dp->d_name, 575 (int)dp->d_namlen); 576 mkentry(locname, dp, listp++); 577 entries++; 578 } 579 } 580 rst_closedir(dirp); 581 if (entries == 0) { 582 fprintf(stderr, "\n"); 583 free(list); 584 return; 585 } 586 qsort((char *)list, entries, sizeof(struct afile), fcmp); 587 } 588 formatf(list, entries); 589 if (dirp != NULL) { 590 for (fp = listp - 1; fp >= list; fp--) 591 freename(fp->fname); 592 fprintf(stderr, "\n"); 593 free(list); 594 } 595 } 596 597 /* 598 * Read the contents of a directory. 599 */ 600 static void 601 mkentry(name, dp, fp) 602 char *name; 603 struct direct *dp; 604 struct afile *fp; 605 { 606 char *cp; 607 struct entry *np; 608 609 fp->fnum = dp->d_ino; 610 fp->fname = savename(dp->d_name); 611 for (cp = fp->fname; *cp; cp++) 612 if (!vflag && (*cp < ' ' || *cp >= 0177)) 613 *cp = '?'; 614 fp->len = cp - fp->fname; 615 if (dflag && TSTINO(fp->fnum, dumpmap) == 0) 616 fp->prefix = '^'; 617 else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) 618 fp->prefix = '*'; 619 else 620 fp->prefix = ' '; 621 switch(dp->d_type) { 622 623 default: 624 fprintf(stderr, "Warning: undefined file type %d\n", 625 dp->d_type); 626 /* fall through */ 627 case DT_REG: 628 fp->postfix = ' '; 629 break; 630 631 case DT_LNK: 632 fp->postfix = '@'; 633 break; 634 635 case DT_FIFO: 636 case DT_SOCK: 637 fp->postfix = '='; 638 break; 639 640 case DT_CHR: 641 case DT_BLK: 642 fp->postfix = '#'; 643 break; 644 645 case DT_WHT: 646 fp->postfix = '%'; 647 break; 648 649 case DT_UNKNOWN: 650 case DT_DIR: 651 if (inodetype(dp->d_ino) == NODE) 652 fp->postfix = '/'; 653 else 654 fp->postfix = ' '; 655 break; 656 } 657 return; 658 } 659 660 /* 661 * Print out a pretty listing of a directory 662 */ 663 static void 664 formatf(list, nentry) 665 struct afile *list; 666 int nentry; 667 { 668 struct afile *fp, *endlist; 669 int width, bigino, haveprefix, havepostfix; 670 int i, j, w, precision = 0, columns, lines; 671 672 width = 0; 673 haveprefix = 0; 674 havepostfix = 0; 675 bigino = ROOTINO; 676 endlist = &list[nentry]; 677 for (fp = &list[0]; fp < endlist; fp++) { 678 if (bigino < fp->fnum) 679 bigino = fp->fnum; 680 if (width < fp->len) 681 width = fp->len; 682 if (fp->prefix != ' ') 683 haveprefix = 1; 684 if (fp->postfix != ' ') 685 havepostfix = 1; 686 } 687 if (haveprefix) 688 width++; 689 if (havepostfix) 690 width++; 691 if (vflag) { 692 for (precision = 0, i = bigino; i > 0; i /= 10) 693 precision++; 694 width += precision + 1; 695 } 696 width++; 697 columns = 81 / width; 698 if (columns == 0) 699 columns = 1; 700 lines = (nentry + columns - 1) / columns; 701 for (i = 0; i < lines; i++) { 702 for (j = 0; j < columns; j++) { 703 fp = &list[j * lines + i]; 704 if (vflag) { 705 fprintf(stderr, "%*d ", precision, fp->fnum); 706 fp->len += precision + 1; 707 } 708 if (haveprefix) { 709 putc(fp->prefix, stderr); 710 fp->len++; 711 } 712 fprintf(stderr, "%s", fp->fname); 713 if (havepostfix) { 714 putc(fp->postfix, stderr); 715 fp->len++; 716 } 717 if (fp + lines >= endlist) { 718 fprintf(stderr, "\n"); 719 break; 720 } 721 for (w = fp->len; w < width; w++) 722 putc(' ', stderr); 723 } 724 } 725 } 726 727 /* 728 * Skip over directory entries that are not on the tape 729 * 730 * First have to get definition of a dirent. 731 */ 732 #undef DIRBLKSIZ 733 #include <dirent.h> 734 #undef d_ino 735 736 struct dirent * 737 glob_readdir(dirp) 738 RST_DIR *dirp; 739 { 740 struct direct *dp; 741 static struct dirent adirent; 742 743 while ((dp = rst_readdir(dirp)) != NULL) { 744 if (!vflag && dp->d_ino == WINO) 745 continue; 746 if (dflag || TSTINO(dp->d_ino, dumpmap)) 747 break; 748 } 749 if (dp == NULL) 750 return (NULL); 751 adirent.d_fileno = dp->d_ino; 752 adirent.d_namlen = dp->d_namlen; 753 memcpy(adirent.d_name, dp->d_name, dp->d_namlen + 1); 754 return (&adirent); 755 } 756 757 /* 758 * Return st_mode information in response to stat or lstat calls 759 */ 760 static int 761 glob_stat(name, stp) 762 const char *name; 763 struct stat *stp; 764 { 765 struct direct *dp; 766 767 dp = pathsearch(name); 768 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 769 (!vflag && dp->d_ino == WINO)) 770 return (-1); 771 if (inodetype(dp->d_ino) == NODE) 772 stp->st_mode = S_IFDIR; 773 else 774 stp->st_mode = S_IFREG; 775 return (0); 776 } 777 778 /* 779 * Comparison routine for qsort. 780 */ 781 static int 782 fcmp(f1, f2) 783 const void *f1, *f2; 784 { 785 return (strcmp(((struct afile *)f1)->fname, 786 ((struct afile *)f2)->fname)); 787 } 788 789 /* 790 * respond to interrupts 791 */ 792 void 793 onintr(signo) 794 int signo; 795 { 796 int save_errno = errno; 797 798 if (command == 'i' && runshell) 799 longjmp(reset, 1); /* XXX signal/longjmp reentrancy */ 800 if (reply("restore interrupted, continue") == FAIL) /* XXX signal race */ 801 _exit(1); 802 errno = save_errno; 803 } 804