1 /* $NetBSD: interactive.c,v 1.9 1995/03/18 14:59:44 cgd 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)interactive.c 8.3 (Berkeley) 9/13/94"; 39 #else 40 static char rcsid[] = "$NetBSD: interactive.c,v 1.9 1995/03/18 14:59:44 cgd Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/time.h> 46 #include <sys/stat.h> 47 48 #include <ufs/ffs/fs.h> 49 #include <ufs/ufs/dinode.h> 50 #include <ufs/ufs/dir.h> 51 #include <protocols/dumprestore.h> 52 53 #include <setjmp.h> 54 #include <glob.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 59 #include "restore.h" 60 #include "extern.h" 61 62 #define round(a, b) (((a) + (b) - 1) / (b) * (b)) 63 64 /* 65 * Things to handle interruptions. 66 */ 67 static int runshell; 68 static jmp_buf reset; 69 static char *nextarg = NULL; 70 71 /* 72 * Structure and routines associated with listing directories. 73 */ 74 struct afile { 75 ino_t fnum; /* inode number of file */ 76 char *fname; /* file name */ 77 short len; /* name length */ 78 char prefix; /* prefix character */ 79 char postfix; /* postfix character */ 80 }; 81 struct arglist { 82 int freeglob; /* glob structure needs to be freed */ 83 int argcnt; /* next globbed argument to return */ 84 glob_t glob; /* globbing information */ 85 char *cmd; /* the current command */ 86 }; 87 88 static char *copynext __P((char *, char *)); 89 static int fcmp __P((const void *, const void *)); 90 static void formatf __P((struct afile *, int)); 91 static void getcmd __P((char *, char *, char *, struct arglist *)); 92 struct dirent *glob_readdir __P((RST_DIR *dirp)); 93 static int glob_stat __P((const char *, struct stat *)); 94 static void mkentry __P((char *, struct direct *, struct afile *)); 95 static void printlist __P((char *, char *)); 96 97 /* 98 * Read and execute commands from the terminal. 99 */ 100 void 101 runcmdshell() 102 { 103 register struct entry *np; 104 ino_t ino; 105 struct arglist arglist; 106 char curdir[MAXPATHLEN]; 107 char name[MAXPATHLEN]; 108 char cmd[BUFSIZ]; 109 110 arglist.freeglob = 0; 111 arglist.argcnt = 0; 112 arglist.glob.gl_flags = GLOB_ALTDIRFUNC; 113 arglist.glob.gl_opendir = (void *)rst_opendir; 114 arglist.glob.gl_readdir = (void *)glob_readdir; 115 arglist.glob.gl_closedir = (void *)rst_closedir; 116 arglist.glob.gl_lstat = glob_stat; 117 arglist.glob.gl_stat = glob_stat; 118 canon("/", curdir); 119 loop: 120 if (setjmp(reset) != 0) { 121 if (arglist.freeglob != 0) { 122 arglist.freeglob = 0; 123 arglist.argcnt = 0; 124 globfree(&arglist.glob); 125 } 126 nextarg = NULL; 127 volno = 0; 128 } 129 runshell = 1; 130 getcmd(curdir, cmd, name, &arglist); 131 switch (cmd[0]) { 132 /* 133 * Add elements to the extraction list. 134 */ 135 case 'a': 136 if (strncmp(cmd, "add", strlen(cmd)) != 0) 137 goto bad; 138 ino = dirlookup(name); 139 if (ino == 0) 140 break; 141 if (mflag) 142 pathcheck(name); 143 treescan(name, ino, addfile); 144 break; 145 /* 146 * Change working directory. 147 */ 148 case 'c': 149 if (strncmp(cmd, "cd", strlen(cmd)) != 0) 150 goto bad; 151 ino = dirlookup(name); 152 if (ino == 0) 153 break; 154 if (inodetype(ino) == LEAF) { 155 fprintf(stderr, "%s: not a directory\n", name); 156 break; 157 } 158 (void) strcpy(curdir, name); 159 break; 160 /* 161 * Delete elements from the extraction list. 162 */ 163 case 'd': 164 if (strncmp(cmd, "delete", strlen(cmd)) != 0) 165 goto bad; 166 np = lookupname(name); 167 if (np == NULL || (np->e_flags & NEW) == 0) { 168 fprintf(stderr, "%s: not on extraction list\n", name); 169 break; 170 } 171 treescan(name, np->e_ino, deletefile); 172 break; 173 /* 174 * Extract the requested list. 175 */ 176 case 'e': 177 if (strncmp(cmd, "extract", strlen(cmd)) != 0) 178 goto bad; 179 createfiles(); 180 createlinks(); 181 setdirmodes(0); 182 if (dflag) 183 checkrestore(); 184 volno = 0; 185 break; 186 /* 187 * List available commands. 188 */ 189 case 'h': 190 if (strncmp(cmd, "help", strlen(cmd)) != 0) 191 goto bad; 192 case '?': 193 fprintf(stderr, "%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s", 194 "Available commands are:\n", 195 "\tls [arg] - list directory\n", 196 "\tcd arg - change directory\n", 197 "\tpwd - print current directory\n", 198 "\tadd [arg] - add `arg' to list of", 199 " files to be extracted\n", 200 "\tdelete [arg] - delete `arg' from", 201 " list of files to be extracted\n", 202 "\textract - extract requested files\n", 203 "\tsetmodes - set modes of requested directories\n", 204 "\tquit - immediately exit program\n", 205 "\twhat - list dump header information\n", 206 "\tverbose - toggle verbose flag", 207 " (useful with ``ls'')\n", 208 "\thelp or `?' - print this list\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 register char *cp; 314 static char input[BUFSIZ]; 315 char output[BUFSIZ]; 316 # define rawname input /* save space by reusing input buffer */ 317 318 /* 319 * Check to see if still processing arguments. 320 */ 321 if (ap->argcnt > 0) 322 goto retnext; 323 if (nextarg != NULL) 324 goto getnext; 325 /* 326 * Read a command line and trim off trailing white space. 327 */ 328 do { 329 fprintf(stderr, "restore > "); 330 (void) fflush(stderr); 331 (void) fgets(input, BUFSIZ, terminal); 332 } while (!feof(terminal) && input[0] == '\n'); 333 if (feof(terminal)) { 334 (void) strcpy(cmd, "quit"); 335 return; 336 } 337 for (cp = &input[strlen(input) - 2]; *cp == ' ' || *cp == '\t'; cp--) 338 /* trim off trailing white space and newline */; 339 *++cp = '\0'; 340 /* 341 * Copy the command into "cmd". 342 */ 343 cp = copynext(input, cmd); 344 ap->cmd = cmd; 345 /* 346 * If no argument, use curdir as the default. 347 */ 348 if (*cp == '\0') { 349 (void) strcpy(name, curdir); 350 return; 351 } 352 nextarg = cp; 353 /* 354 * Find the next argument. 355 */ 356 getnext: 357 cp = copynext(nextarg, rawname); 358 if (*cp == '\0') 359 nextarg = NULL; 360 else 361 nextarg = cp; 362 /* 363 * If it is an absolute pathname, canonicalize it and return it. 364 */ 365 if (rawname[0] == '/') { 366 canon(rawname, name); 367 } else { 368 /* 369 * For relative pathnames, prepend the current directory to 370 * it then canonicalize and return it. 371 */ 372 (void) strcpy(output, curdir); 373 (void) strcat(output, "/"); 374 (void) strcat(output, rawname); 375 canon(output, name); 376 } 377 if (glob(name, GLOB_ALTDIRFUNC, NULL, &ap->glob) < 0) 378 fprintf(stderr, "%s: out of memory\n", ap->cmd); 379 if (ap->glob.gl_pathc == 0) 380 return; 381 ap->freeglob = 1; 382 ap->argcnt = ap->glob.gl_pathc; 383 384 retnext: 385 strcpy(name, ap->glob.gl_pathv[ap->glob.gl_pathc - ap->argcnt]); 386 if (--ap->argcnt == 0) { 387 ap->freeglob = 0; 388 globfree(&ap->glob); 389 } 390 # undef rawname 391 } 392 393 /* 394 * Strip off the next token of the input. 395 */ 396 static char * 397 copynext(input, output) 398 char *input, *output; 399 { 400 register char *cp, *bp; 401 char quote; 402 403 for (cp = input; *cp == ' ' || *cp == '\t'; cp++) 404 /* skip to argument */; 405 bp = output; 406 while (*cp != ' ' && *cp != '\t' && *cp != '\0') { 407 /* 408 * Handle back slashes. 409 */ 410 if (*cp == '\\') { 411 if (*++cp == '\0') { 412 fprintf(stderr, 413 "command lines cannot be continued\n"); 414 continue; 415 } 416 *bp++ = *cp++; 417 continue; 418 } 419 /* 420 * The usual unquoted case. 421 */ 422 if (*cp != '\'' && *cp != '"') { 423 *bp++ = *cp++; 424 continue; 425 } 426 /* 427 * Handle single and double quotes. 428 */ 429 quote = *cp++; 430 while (*cp != quote && *cp != '\0') 431 *bp++ = *cp++ | 0200; 432 if (*cp++ == '\0') { 433 fprintf(stderr, "missing %c\n", quote); 434 cp--; 435 continue; 436 } 437 } 438 *bp = '\0'; 439 return (cp); 440 } 441 442 /* 443 * Canonicalize file names to always start with ``./'' and 444 * remove any imbedded "." and ".." components. 445 */ 446 void 447 canon(rawname, canonname) 448 char *rawname, *canonname; 449 { 450 register char *cp, *np; 451 452 if (strcmp(rawname, ".") == 0 || strncmp(rawname, "./", 2) == 0) 453 (void) strcpy(canonname, ""); 454 else if (rawname[0] == '/') 455 (void) strcpy(canonname, "."); 456 else 457 (void) strcpy(canonname, "./"); 458 (void) strcat(canonname, rawname); 459 /* 460 * Eliminate multiple and trailing '/'s 461 */ 462 for (cp = np = canonname; *np != '\0'; cp++) { 463 *cp = *np++; 464 while (*cp == '/' && *np == '/') 465 np++; 466 } 467 *cp = '\0'; 468 if (*--cp == '/') 469 *cp = '\0'; 470 /* 471 * Eliminate extraneous "." and ".." from pathnames. 472 */ 473 for (np = canonname; *np != '\0'; ) { 474 np++; 475 cp = np; 476 while (*np != '/' && *np != '\0') 477 np++; 478 if (np - cp == 1 && *cp == '.') { 479 cp--; 480 (void) strcpy(cp, np); 481 np = cp; 482 } 483 if (np - cp == 2 && strncmp(cp, "..", 2) == 0) { 484 cp--; 485 while (cp > &canonname[1] && *--cp != '/') 486 /* find beginning of name */; 487 (void) strcpy(cp, np); 488 np = cp; 489 } 490 } 491 } 492 493 /* 494 * Do an "ls" style listing of a directory 495 */ 496 static void 497 printlist(name, basename) 498 char *name; 499 char *basename; 500 { 501 register struct afile *fp, *list, *listp; 502 register struct direct *dp; 503 struct afile single; 504 RST_DIR *dirp; 505 int entries, len, namelen; 506 char locname[MAXPATHLEN + 1]; 507 508 dp = pathsearch(name); 509 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 510 (!vflag && dp->d_ino == WINO)) 511 return; 512 if ((dirp = rst_opendir(name)) == NULL) { 513 entries = 1; 514 list = &single; 515 mkentry(name, dp, list); 516 len = strlen(basename) + 1; 517 if (strlen(name) - len > single.len) { 518 freename(single.fname); 519 single.fname = savename(&name[len]); 520 single.len = strlen(single.fname); 521 } 522 } else { 523 entries = 0; 524 while (dp = rst_readdir(dirp)) 525 entries++; 526 rst_closedir(dirp); 527 list = (struct afile *)malloc(entries * sizeof(struct afile)); 528 if (list == NULL) { 529 fprintf(stderr, "ls: out of memory\n"); 530 return; 531 } 532 if ((dirp = rst_opendir(name)) == NULL) 533 panic("directory reopen failed\n"); 534 fprintf(stderr, "%s:\n", name); 535 entries = 0; 536 listp = list; 537 (void) strncpy(locname, name, MAXPATHLEN); 538 (void) strncat(locname, "/", MAXPATHLEN); 539 namelen = strlen(locname); 540 while (dp = rst_readdir(dirp)) { 541 if (dp == NULL) 542 break; 543 if (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) 544 continue; 545 if (!vflag && (dp->d_ino == WINO || 546 strcmp(dp->d_name, ".") == 0 || 547 strcmp(dp->d_name, "..") == 0)) 548 continue; 549 locname[namelen] = '\0'; 550 if (namelen + dp->d_namlen >= MAXPATHLEN) { 551 fprintf(stderr, "%s%s: name exceeds %d char\n", 552 locname, dp->d_name, MAXPATHLEN); 553 } else { 554 (void) strncat(locname, dp->d_name, 555 (int)dp->d_namlen); 556 mkentry(locname, dp, listp++); 557 entries++; 558 } 559 } 560 rst_closedir(dirp); 561 if (entries == 0) { 562 fprintf(stderr, "\n"); 563 free(list); 564 return; 565 } 566 qsort((char *)list, entries, sizeof(struct afile), fcmp); 567 } 568 formatf(list, entries); 569 if (dirp != NULL) { 570 for (fp = listp - 1; fp >= list; fp--) 571 freename(fp->fname); 572 fprintf(stderr, "\n"); 573 free(list); 574 } 575 } 576 577 /* 578 * Read the contents of a directory. 579 */ 580 static void 581 mkentry(name, dp, fp) 582 char *name; 583 struct direct *dp; 584 register struct afile *fp; 585 { 586 char *cp; 587 struct entry *np; 588 589 fp->fnum = dp->d_ino; 590 fp->fname = savename(dp->d_name); 591 for (cp = fp->fname; *cp; cp++) 592 if (!vflag && (*cp < ' ' || *cp >= 0177)) 593 *cp = '?'; 594 fp->len = cp - fp->fname; 595 if (dflag && TSTINO(fp->fnum, dumpmap) == 0) 596 fp->prefix = '^'; 597 else if ((np = lookupname(name)) != NULL && (np->e_flags & NEW)) 598 fp->prefix = '*'; 599 else 600 fp->prefix = ' '; 601 switch(dp->d_type) { 602 603 default: 604 fprintf(stderr, "Warning: undefined file type %d\n", 605 dp->d_type); 606 /* fall through */ 607 case DT_REG: 608 fp->postfix = ' '; 609 break; 610 611 case DT_LNK: 612 fp->postfix = '@'; 613 break; 614 615 case DT_FIFO: 616 case DT_SOCK: 617 fp->postfix = '='; 618 break; 619 620 case DT_CHR: 621 case DT_BLK: 622 fp->postfix = '#'; 623 break; 624 625 case DT_WHT: 626 fp->postfix = '%'; 627 break; 628 629 case DT_UNKNOWN: 630 case DT_DIR: 631 if (inodetype(dp->d_ino) == NODE) 632 fp->postfix = '/'; 633 else 634 fp->postfix = ' '; 635 break; 636 } 637 return; 638 } 639 640 /* 641 * Print out a pretty listing of a directory 642 */ 643 static void 644 formatf(list, nentry) 645 register struct afile *list; 646 int nentry; 647 { 648 register struct afile *fp, *endlist; 649 int width, bigino, haveprefix, havepostfix; 650 int i, j, w, precision, columns, lines; 651 652 width = 0; 653 haveprefix = 0; 654 havepostfix = 0; 655 bigino = ROOTINO; 656 endlist = &list[nentry]; 657 for (fp = &list[0]; fp < endlist; fp++) { 658 if (bigino < fp->fnum) 659 bigino = fp->fnum; 660 if (width < fp->len) 661 width = fp->len; 662 if (fp->prefix != ' ') 663 haveprefix = 1; 664 if (fp->postfix != ' ') 665 havepostfix = 1; 666 } 667 if (haveprefix) 668 width++; 669 if (havepostfix) 670 width++; 671 if (vflag) { 672 for (precision = 0, i = bigino; i > 0; i /= 10) 673 precision++; 674 width += precision + 1; 675 } 676 width++; 677 columns = 81 / width; 678 if (columns == 0) 679 columns = 1; 680 lines = (nentry + columns - 1) / columns; 681 for (i = 0; i < lines; i++) { 682 for (j = 0; j < columns; j++) { 683 fp = &list[j * lines + i]; 684 if (vflag) { 685 fprintf(stderr, "%*d ", precision, fp->fnum); 686 fp->len += precision + 1; 687 } 688 if (haveprefix) { 689 putc(fp->prefix, stderr); 690 fp->len++; 691 } 692 fprintf(stderr, "%s", fp->fname); 693 if (havepostfix) { 694 putc(fp->postfix, stderr); 695 fp->len++; 696 } 697 if (fp + lines >= endlist) { 698 fprintf(stderr, "\n"); 699 break; 700 } 701 for (w = fp->len; w < width; w++) 702 putc(' ', stderr); 703 } 704 } 705 } 706 707 /* 708 * Skip over directory entries that are not on the tape 709 * 710 * First have to get definition of a dirent. 711 */ 712 #undef DIRBLKSIZ 713 #include <dirent.h> 714 #undef d_ino 715 716 struct dirent * 717 glob_readdir(dirp) 718 RST_DIR *dirp; 719 { 720 struct direct *dp; 721 static struct dirent adirent; 722 723 while ((dp = rst_readdir(dirp)) != NULL) { 724 if (!vflag && dp->d_ino == WINO) 725 continue; 726 if (dflag || TSTINO(dp->d_ino, dumpmap)) 727 break; 728 } 729 if (dp == NULL) 730 return (NULL); 731 adirent.d_fileno = dp->d_ino; 732 adirent.d_namlen = dp->d_namlen; 733 memcpy(adirent.d_name, dp->d_name, dp->d_namlen + 1); 734 return (&adirent); 735 } 736 737 /* 738 * Return st_mode information in response to stat or lstat calls 739 */ 740 static int 741 glob_stat(name, stp) 742 const char *name; 743 struct stat *stp; 744 { 745 register struct direct *dp; 746 747 dp = pathsearch(name); 748 if (dp == NULL || (!dflag && TSTINO(dp->d_ino, dumpmap) == 0) || 749 (!vflag && dp->d_ino == WINO)) 750 return (-1); 751 if (inodetype(dp->d_ino) == NODE) 752 stp->st_mode = S_IFDIR; 753 else 754 stp->st_mode = S_IFREG; 755 return (0); 756 } 757 758 /* 759 * Comparison routine for qsort. 760 */ 761 static int 762 fcmp(f1, f2) 763 register const void *f1, *f2; 764 { 765 return (strcmp(((struct afile *)f1)->fname, 766 ((struct afile *)f2)->fname)); 767 } 768 769 /* 770 * respond to interrupts 771 */ 772 void 773 onintr(signo) 774 int signo; 775 { 776 if (command == 'i' && runshell) 777 longjmp(reset, 1); 778 if (reply("restore interrupted, continue") == FAIL) 779 exit(1); 780 } 781