1 /* $NetBSD: ls.c,v 1.61 2006/09/23 19:54:53 elad Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Michael Fischbein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 __COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\ 38 The Regents of the University of California. All rights reserved.\n"); 39 #endif /* not lint */ 40 41 #ifndef lint 42 #if 0 43 static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 44 #else 45 __RCSID("$NetBSD: ls.c,v 1.61 2006/09/23 19:54:53 elad Exp $"); 46 #endif 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 #include <sys/stat.h> 51 #include <sys/ioctl.h> 52 53 #include <dirent.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fts.h> 57 #include <locale.h> 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <unistd.h> 62 #include <termios.h> 63 #include <pwd.h> 64 #include <grp.h> 65 66 #include "ls.h" 67 #include "extern.h" 68 69 static void display(FTSENT *, FTSENT *); 70 static int mastercmp(const FTSENT **, const FTSENT **); 71 static void traverse(int, char **, int); 72 73 static void (*printfcn)(DISPLAY *); 74 static int (*sortfcn)(const FTSENT *, const FTSENT *); 75 76 #define BY_NAME 0 77 #define BY_SIZE 1 78 #define BY_TIME 2 79 80 long blocksize; /* block size units */ 81 int termwidth = 80; /* default terminal width */ 82 int sortkey = BY_NAME; 83 int rval = EXIT_SUCCESS; /* exit value - set if error encountered */ 84 85 /* flags */ 86 int f_accesstime; /* use time of last access */ 87 int f_column; /* columnated format */ 88 int f_columnacross; /* columnated format, sorted across */ 89 int f_flags; /* show flags associated with a file */ 90 int f_grouponly; /* long listing without owner */ 91 int f_humanize; /* humanize the size field */ 92 int f_inode; /* print inode */ 93 int f_listdir; /* list actual directory, not contents */ 94 int f_listdot; /* list files beginning with . */ 95 int f_longform; /* long listing format */ 96 int f_nonprint; /* show unprintables as ? */ 97 int f_nosort; /* don't sort output */ 98 int f_numericonly; /* don't convert uid/gid to name */ 99 int f_octal; /* print octal escapes for nongraphic characters */ 100 int f_octal_escape; /* like f_octal but use C escapes if possible */ 101 int f_recursive; /* ls subdirectories also */ 102 int f_reversesort; /* reverse whatever sort is used */ 103 int f_sectime; /* print the real time for all files */ 104 int f_singlecol; /* use single column output */ 105 int f_size; /* list size in short listing */ 106 int f_statustime; /* use time of last mode change */ 107 int f_stream; /* stream format */ 108 int f_type; /* add type character for non-regular files */ 109 int f_typedir; /* add type character for directories */ 110 int f_whiteout; /* show whiteout entries */ 111 112 int 113 ls_main(int argc, char *argv[]) 114 { 115 static char dot[] = ".", *dotav[] = { dot, NULL }; 116 struct winsize win; 117 int ch, fts_options; 118 int kflag = 0; 119 const char *p; 120 121 setprogname(argv[0]); 122 setlocale(LC_ALL, ""); 123 124 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 125 if (isatty(STDOUT_FILENO)) { 126 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 127 win.ws_col > 0) 128 termwidth = win.ws_col; 129 f_column = f_nonprint = 1; 130 } else 131 f_singlecol = 1; 132 133 /* Root is -A automatically. */ 134 if (!getuid()) 135 f_listdot = 1; 136 137 fts_options = FTS_PHYSICAL; 138 while ((ch = getopt(argc, argv, "1ABCFLRSTWabcdfghiklmnopqrstuwx")) != -1) { 139 switch (ch) { 140 /* 141 * The -1, -C, -l, -m and -x options all override each other so 142 * shell aliasing works correctly. 143 */ 144 case '1': 145 f_singlecol = 1; 146 f_column = f_columnacross = f_longform = f_stream = 0; 147 break; 148 case 'C': 149 f_column = 1; 150 f_columnacross = f_longform = f_singlecol = f_stream = 151 0; 152 break; 153 case 'g': 154 if (f_grouponly != -1) 155 f_grouponly = 1; 156 f_longform = 1; 157 f_column = f_columnacross = f_singlecol = f_stream = 0; 158 break; 159 case 'l': 160 f_longform = 1; 161 f_column = f_columnacross = f_singlecol = f_stream = 0; 162 /* Never let -g take precedence over -l. */ 163 f_grouponly = -1; 164 break; 165 case 'm': 166 f_stream = 1; 167 f_column = f_columnacross = f_longform = f_singlecol = 168 0; 169 break; 170 case 'x': 171 f_columnacross = 1; 172 f_column = f_longform = f_singlecol = f_stream = 0; 173 break; 174 /* The -c and -u options override each other. */ 175 case 'c': 176 f_statustime = 1; 177 f_accesstime = 0; 178 break; 179 case 'u': 180 f_accesstime = 1; 181 f_statustime = 0; 182 break; 183 case 'F': 184 f_type = 1; 185 break; 186 case 'L': 187 fts_options &= ~FTS_PHYSICAL; 188 fts_options |= FTS_LOGICAL; 189 break; 190 case 'R': 191 f_recursive = 1; 192 break; 193 case 'a': 194 fts_options |= FTS_SEEDOT; 195 /* FALLTHROUGH */ 196 case 'A': 197 f_listdot = 1; 198 break; 199 /* The -B option turns off the -b, -q and -w options. */ 200 case 'B': 201 f_nonprint = 0; 202 f_octal = 1; 203 f_octal_escape = 0; 204 break; 205 /* The -b option turns off the -B, -q and -w options. */ 206 case 'b': 207 f_nonprint = 0; 208 f_octal = 0; 209 f_octal_escape = 1; 210 break; 211 /* The -d option turns off the -R option. */ 212 case 'd': 213 f_listdir = 1; 214 f_recursive = 0; 215 break; 216 case 'f': 217 f_nosort = 1; 218 break; 219 case 'i': 220 f_inode = 1; 221 break; 222 case 'k': 223 blocksize = 1024; 224 kflag = 1; 225 f_humanize = 0; 226 break; 227 /* The -h option forces all sizes to be measured in bytes. */ 228 case 'h': 229 f_humanize = 1; 230 kflag = 0; 231 break; 232 case 'n': 233 f_numericonly = 1; 234 break; 235 case 'o': 236 f_flags = 1; 237 break; 238 case 'p': 239 f_typedir = 1; 240 break; 241 /* The -q option turns off the -B, -b and -w options. */ 242 case 'q': 243 f_nonprint = 1; 244 f_octal = 0; 245 f_octal_escape = 0; 246 break; 247 case 'r': 248 f_reversesort = 1; 249 break; 250 case 'S': 251 sortkey = BY_SIZE; 252 break; 253 case 's': 254 f_size = 1; 255 break; 256 case 'T': 257 f_sectime = 1; 258 break; 259 case 't': 260 sortkey = BY_TIME; 261 break; 262 case 'W': 263 f_whiteout = 1; 264 break; 265 /* The -w option turns off the -B, -b and -q options. */ 266 case 'w': 267 f_nonprint = 0; 268 f_octal = 0; 269 f_octal_escape = 0; 270 break; 271 default: 272 case '?': 273 usage(); 274 } 275 } 276 argc -= optind; 277 argv += optind; 278 279 if (f_column || f_columnacross || f_stream) { 280 if ((p = getenv("COLUMNS")) != NULL) 281 termwidth = atoi(p); 282 } 283 284 /* 285 * If both -g and -l options, let -l take precedence. 286 */ 287 if (f_grouponly == -1) 288 f_grouponly = 0; 289 290 /* 291 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 292 * information. 293 */ 294 if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir && 295 sortkey == BY_NAME) 296 fts_options |= FTS_NOSTAT; 297 298 /* 299 * If not -F, -d or -l options, follow any symbolic links listed on 300 * the command line. 301 */ 302 if (!f_longform && !f_listdir && !f_type) 303 fts_options |= FTS_COMFOLLOW; 304 305 /* 306 * If -W, show whiteout entries 307 */ 308 #ifdef FTS_WHITEOUT 309 if (f_whiteout) 310 fts_options |= FTS_WHITEOUT; 311 #endif 312 313 /* If -l or -s, figure out block size. */ 314 if (f_inode || f_longform || f_size) { 315 if (!kflag) 316 (void)getbsize(NULL, &blocksize); 317 blocksize /= 512; 318 } 319 320 /* Select a sort function. */ 321 if (f_reversesort) { 322 switch (sortkey) { 323 case BY_NAME: 324 sortfcn = revnamecmp; 325 break; 326 case BY_SIZE: 327 sortfcn = revsizecmp; 328 break; 329 case BY_TIME: 330 if (f_accesstime) 331 sortfcn = revacccmp; 332 else if (f_statustime) 333 sortfcn = revstatcmp; 334 else /* Use modification time. */ 335 sortfcn = revmodcmp; 336 break; 337 } 338 } else { 339 switch (sortkey) { 340 case BY_NAME: 341 sortfcn = namecmp; 342 break; 343 case BY_SIZE: 344 sortfcn = sizecmp; 345 break; 346 case BY_TIME: 347 if (f_accesstime) 348 sortfcn = acccmp; 349 else if (f_statustime) 350 sortfcn = statcmp; 351 else /* Use modification time. */ 352 sortfcn = modcmp; 353 break; 354 } 355 } 356 357 /* Select a print function. */ 358 if (f_singlecol) 359 printfcn = printscol; 360 else if (f_columnacross) 361 printfcn = printacol; 362 else if (f_longform) 363 printfcn = printlong; 364 else if (f_stream) 365 printfcn = printstream; 366 else 367 printfcn = printcol; 368 369 if (argc) 370 traverse(argc, argv, fts_options); 371 else 372 traverse(1, dotav, fts_options); 373 exit(rval); 374 /* NOTREACHED */ 375 } 376 377 static int output; /* If anything output. */ 378 379 /* 380 * Traverse() walks the logical directory structure specified by the argv list 381 * in the order specified by the mastercmp() comparison function. During the 382 * traversal it passes linked lists of structures to display() which represent 383 * a superset (may be exact set) of the files to be displayed. 384 */ 385 static void 386 traverse(int argc, char *argv[], int options) 387 { 388 FTS *ftsp; 389 FTSENT *p, *chp; 390 int ch_options, error; 391 392 if ((ftsp = 393 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 394 err(EXIT_FAILURE, NULL); 395 396 display(NULL, fts_children(ftsp, 0)); 397 if (f_listdir) { 398 fts_close(ftsp); 399 return; 400 } 401 402 /* 403 * If not recursing down this tree and don't need stat info, just get 404 * the names. 405 */ 406 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 407 408 while ((p = fts_read(ftsp)) != NULL) 409 switch (p->fts_info) { 410 case FTS_DC: 411 warnx("%s: directory causes a cycle", p->fts_name); 412 break; 413 case FTS_DNR: 414 case FTS_ERR: 415 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 416 rval = EXIT_FAILURE; 417 break; 418 case FTS_D: 419 if (p->fts_level != FTS_ROOTLEVEL && 420 p->fts_name[0] == '.' && !f_listdot) 421 break; 422 423 /* 424 * If already output something, put out a newline as 425 * a separator. If multiple arguments, precede each 426 * directory with its name. 427 */ 428 if (output) 429 (void)printf("\n%s:\n", p->fts_path); 430 else if (argc > 1) { 431 (void)printf("%s:\n", p->fts_path); 432 output = 1; 433 } 434 435 chp = fts_children(ftsp, ch_options); 436 display(p, chp); 437 438 if (!f_recursive && chp != NULL) 439 (void)fts_set(ftsp, p, FTS_SKIP); 440 break; 441 } 442 error = errno; 443 fts_close(ftsp); 444 errno = error; 445 if (errno) 446 err(EXIT_FAILURE, "fts_read"); 447 } 448 449 /* 450 * Display() takes a linked list of FTSENT structures and passes the list 451 * along with any other necessary information to the print function. P 452 * points to the parent directory of the display list. 453 */ 454 static void 455 display(FTSENT *p, FTSENT *list) 456 { 457 struct stat *sp; 458 DISPLAY d; 459 FTSENT *cur; 460 NAMES *np; 461 u_int64_t btotal, stotal, maxblock, maxsize; 462 int maxinode, maxnlink, maxmajor, maxminor; 463 int bcfile, entries, flen, glen, ulen, maxflags, maxgroup, maxlen; 464 int maxuser, needstats; 465 const char *user, *group; 466 char buf[21]; /* 64 bits == 20 digits, +1 for NUL */ 467 char nuser[12], ngroup[12]; 468 char *flags = NULL; 469 470 #ifdef __GNUC__ 471 /* This outrageous construct just to shut up a GCC warning. */ 472 (void) &maxsize; 473 #endif 474 475 /* 476 * If list is NULL there are two possibilities: that the parent 477 * directory p has no children, or that fts_children() returned an 478 * error. We ignore the error case since it will be replicated 479 * on the next call to fts_read() on the post-order visit to the 480 * directory p, and will be signalled in traverse(). 481 */ 482 if (list == NULL) 483 return; 484 485 needstats = f_inode || f_longform || f_size; 486 flen = 0; 487 maxinode = maxnlink = 0; 488 bcfile = 0; 489 maxuser = maxgroup = maxflags = maxlen = 0; 490 btotal = stotal = maxblock = maxsize = 0; 491 maxmajor = maxminor = 0; 492 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 493 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 494 warnx("%s: %s", 495 cur->fts_name, strerror(cur->fts_errno)); 496 cur->fts_number = NO_PRINT; 497 rval = EXIT_FAILURE; 498 continue; 499 } 500 501 /* 502 * P is NULL if list is the argv list, to which different rules 503 * apply. 504 */ 505 if (p == NULL) { 506 /* Directories will be displayed later. */ 507 if (cur->fts_info == FTS_D && !f_listdir) { 508 cur->fts_number = NO_PRINT; 509 continue; 510 } 511 } else { 512 /* Only display dot file if -a/-A set. */ 513 if (cur->fts_name[0] == '.' && !f_listdot) { 514 cur->fts_number = NO_PRINT; 515 continue; 516 } 517 } 518 if (cur->fts_namelen > maxlen) 519 maxlen = cur->fts_namelen; 520 if (needstats) { 521 sp = cur->fts_statp; 522 if (sp->st_blocks > maxblock) 523 maxblock = sp->st_blocks; 524 if (sp->st_ino > maxinode) 525 maxinode = sp->st_ino; 526 if (sp->st_nlink > maxnlink) 527 maxnlink = sp->st_nlink; 528 if (sp->st_size > maxsize) 529 maxsize = sp->st_size; 530 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 531 bcfile = 1; 532 if (major(sp->st_rdev) > maxmajor) 533 maxmajor = major(sp->st_rdev); 534 if (minor(sp->st_rdev) > maxminor) 535 maxminor = minor(sp->st_rdev); 536 } 537 538 btotal += sp->st_blocks; 539 stotal += sp->st_size; 540 if (f_longform) { 541 if (f_numericonly || 542 (user = user_from_uid(sp->st_uid, 0)) == 543 NULL) { 544 (void)snprintf(nuser, sizeof(nuser), 545 "%u", sp->st_uid); 546 user = nuser; 547 } 548 if (f_numericonly || 549 (group = group_from_gid(sp->st_gid, 0)) == 550 NULL) { 551 (void)snprintf(ngroup, sizeof(ngroup), 552 "%u", sp->st_gid); 553 group = ngroup; 554 } 555 if ((ulen = strlen(user)) > maxuser) 556 maxuser = ulen; 557 if ((glen = strlen(group)) > maxgroup) 558 maxgroup = glen; 559 if (f_flags) { 560 flags = 561 flags_to_string(sp->st_flags, "-"); 562 if ((flen = strlen(flags)) > maxflags) 563 maxflags = flen; 564 } else 565 flen = 0; 566 567 if ((np = malloc(sizeof(NAMES) + 568 ulen + glen + flen + 2)) == NULL) 569 err(EXIT_FAILURE, NULL); 570 571 np->user = &np->data[0]; 572 (void)strcpy(np->user, user); 573 np->group = &np->data[ulen + 1]; 574 (void)strcpy(np->group, group); 575 576 if (f_flags) { 577 np->flags = &np->data[ulen + glen + 2]; 578 (void)strcpy(np->flags, flags); 579 } 580 cur->fts_pointer = np; 581 } 582 } 583 ++entries; 584 } 585 586 if (!entries) 587 return; 588 589 d.list = list; 590 d.entries = entries; 591 d.maxlen = maxlen; 592 if (needstats) { 593 d.btotal = btotal; 594 d.stotal = stotal; 595 if (f_humanize) { 596 d.s_block = 4; /* min buf length for humanize_number */ 597 } else { 598 (void)snprintf(buf, sizeof(buf), "%llu", 599 (long long)howmany(maxblock, blocksize)); 600 d.s_block = strlen(buf); 601 } 602 d.s_flags = maxflags; 603 d.s_group = maxgroup; 604 (void)snprintf(buf, sizeof(buf), "%u", maxinode); 605 d.s_inode = strlen(buf); 606 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 607 d.s_nlink = strlen(buf); 608 if (f_humanize) { 609 d.s_size = 4; /* min buf length for humanize_number */ 610 } else { 611 (void)snprintf(buf, sizeof(buf), "%llu", 612 (long long)maxsize); 613 d.s_size = strlen(buf); 614 } 615 d.s_user = maxuser; 616 if (bcfile) { 617 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 618 d.s_major = strlen(buf); 619 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 620 d.s_minor = strlen(buf); 621 if (d.s_major + d.s_minor + 2 > d.s_size) 622 d.s_size = d.s_major + d.s_minor + 2; 623 else if (d.s_size - d.s_minor - 2 > d.s_major) 624 d.s_major = d.s_size - d.s_minor - 2; 625 } else { 626 d.s_major = 0; 627 d.s_minor = 0; 628 } 629 } 630 631 printfcn(&d); 632 output = 1; 633 634 if (f_longform) 635 for (cur = list; cur; cur = cur->fts_link) 636 free(cur->fts_pointer); 637 } 638 639 /* 640 * Ordering for mastercmp: 641 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 642 * as larger than directories. Within either group, use the sort function. 643 * All other levels use the sort function. Error entries remain unsorted. 644 */ 645 static int 646 mastercmp(const FTSENT **a, const FTSENT **b) 647 { 648 int a_info, b_info; 649 650 a_info = (*a)->fts_info; 651 if (a_info == FTS_ERR) 652 return (0); 653 b_info = (*b)->fts_info; 654 if (b_info == FTS_ERR) 655 return (0); 656 657 if (a_info == FTS_NS || b_info == FTS_NS) { 658 if (b_info != FTS_NS) 659 return (1); 660 else if (a_info != FTS_NS) 661 return (-1); 662 else 663 return (namecmp(*a, *b)); 664 } 665 666 if (a_info != b_info && !f_listdir && 667 (*a)->fts_level == FTS_ROOTLEVEL) { 668 if (a_info == FTS_D) 669 return (1); 670 else if (b_info == FTS_D) 671 return (-1); 672 } 673 return (sortfcn(*a, *b)); 674 } 675