ls.c revision 1.70
1/* $NetBSD: ls.c,v 1.70 2012/11/20 12:37:29 abs 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\ 38 The Regents of the University of California. All rights reserved."); 39#endif /* not lint */ 40 41#ifndef lint 42#if 0 43static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 44#else 45__RCSID("$NetBSD: ls.c,v 1.70 2012/11/20 12:37:29 abs Exp $"); 46#endif 47#endif /* not lint */ 48 49#include <sys/param.h> 50#include <sys/types.h> 51#include <sys/stat.h> 52#include <sys/ioctl.h> 53 54#include <dirent.h> 55#include <err.h> 56#include <errno.h> 57#include <fts.h> 58#include <locale.h> 59#include <stdio.h> 60#include <stdlib.h> 61#include <string.h> 62#include <unistd.h> 63#include <termios.h> 64#include <pwd.h> 65#include <grp.h> 66#include <util.h> 67 68#include "ls.h" 69#include "extern.h" 70 71static void display(FTSENT *, FTSENT *); 72static int mastercmp(const FTSENT **, const FTSENT **); 73static void traverse(int, char **, int); 74 75static void (*printfcn)(DISPLAY *); 76static int (*sortfcn)(const FTSENT *, const FTSENT *); 77 78#define BY_NAME 0 79#define BY_SIZE 1 80#define BY_TIME 2 81 82long blocksize; /* block size units */ 83int termwidth = 80; /* default terminal width */ 84int sortkey = BY_NAME; 85int rval = EXIT_SUCCESS; /* exit value - set if error encountered */ 86 87/* flags */ 88int f_accesstime; /* use time of last access */ 89int f_column; /* columnated format */ 90int f_columnacross; /* columnated format, sorted across */ 91int f_flags; /* show flags associated with a file */ 92int f_grouponly; /* long listing without owner */ 93int f_humanize; /* humanize the size field */ 94int f_commas; /* separate size field with comma */ 95int f_inode; /* print inode */ 96int f_listdir; /* list actual directory, not contents */ 97int f_listdot; /* list files beginning with . */ 98int f_longform; /* long listing format */ 99int f_nonprint; /* show unprintables as ? */ 100int f_nosort; /* don't sort output */ 101int f_numericonly; /* don't convert uid/gid to name */ 102int f_octal; /* print octal escapes for nongraphic characters */ 103int f_octal_escape; /* like f_octal but use C escapes if possible */ 104int f_recursive; /* ls subdirectories also */ 105int f_reversesort; /* reverse whatever sort is used */ 106int f_sectime; /* print the real time for all files */ 107int f_singlecol; /* use single column output */ 108int f_size; /* list size in short listing */ 109int f_statustime; /* use time of last mode change */ 110int f_stream; /* stream format */ 111int f_type; /* add type character for non-regular files */ 112int f_typedir; /* add type character for directories */ 113int f_whiteout; /* show whiteout entries */ 114 115__dead static void 116usage(void) 117{ 118 119 (void)fprintf(stderr, 120 "usage: %s [-1AaBbCcdFfghikLlMmnopqRrSsTtuWwx] [file ...]\n", 121 getprogname()); 122 exit(EXIT_FAILURE); 123 /* NOTREACHED */ 124} 125 126int 127ls_main(int argc, char *argv[]) 128{ 129 static char dot[] = ".", *dotav[] = { dot, NULL }; 130 struct winsize win; 131 int ch, fts_options; 132 int kflag = 0; 133 const char *p; 134 135 setprogname(argv[0]); 136 (void)setlocale(LC_ALL, ""); 137 138 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 139 if (isatty(STDOUT_FILENO)) { 140 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 141 win.ws_col > 0) 142 termwidth = win.ws_col; 143 f_column = f_nonprint = 1; 144 } else 145 f_singlecol = 1; 146 147 /* Root is -A automatically. */ 148 if (!getuid()) 149 f_listdot = 1; 150 151 fts_options = FTS_PHYSICAL; 152 while ((ch = getopt(argc, argv, "1ABCFLMRSTWabcdfghiklmnopqrstuwx")) != -1) { 153 switch (ch) { 154 /* 155 * The -1, -C, -l, -m and -x options all override each other so 156 * shell aliasing works correctly. 157 */ 158 case '1': 159 f_singlecol = 1; 160 f_column = f_columnacross = f_longform = f_stream = 0; 161 break; 162 case 'C': 163 f_column = 1; 164 f_columnacross = f_longform = f_singlecol = f_stream = 165 0; 166 break; 167 case 'g': 168 if (f_grouponly != -1) 169 f_grouponly = 1; 170 f_longform = 1; 171 f_column = f_columnacross = f_singlecol = f_stream = 0; 172 break; 173 case 'l': 174 f_longform = 1; 175 f_column = f_columnacross = f_singlecol = f_stream = 0; 176 /* Never let -g take precedence over -l. */ 177 f_grouponly = -1; 178 break; 179 case 'm': 180 f_stream = 1; 181 f_column = f_columnacross = f_longform = f_singlecol = 182 0; 183 break; 184 case 'x': 185 f_columnacross = 1; 186 f_column = f_longform = f_singlecol = f_stream = 0; 187 break; 188 /* The -c and -u options override each other. */ 189 case 'c': 190 f_statustime = 1; 191 f_accesstime = 0; 192 break; 193 case 'u': 194 f_accesstime = 1; 195 f_statustime = 0; 196 break; 197 case 'F': 198 f_type = 1; 199 break; 200 case 'L': 201 fts_options &= ~FTS_PHYSICAL; 202 fts_options |= FTS_LOGICAL; 203 break; 204 case 'R': 205 f_recursive = 1; 206 break; 207 case 'a': 208 fts_options |= FTS_SEEDOT; 209 /* FALLTHROUGH */ 210 case 'A': 211 f_listdot = 1; 212 break; 213 /* The -B option turns off the -b, -q and -w options. */ 214 case 'B': 215 f_nonprint = 0; 216 f_octal = 1; 217 f_octal_escape = 0; 218 break; 219 /* The -b option turns off the -B, -q and -w options. */ 220 case 'b': 221 f_nonprint = 0; 222 f_octal = 0; 223 f_octal_escape = 1; 224 break; 225 /* The -d option turns off the -R option. */ 226 case 'd': 227 f_listdir = 1; 228 f_recursive = 0; 229 break; 230 case 'f': 231 f_nosort = 1; 232 break; 233 case 'i': 234 f_inode = 1; 235 break; 236 case 'k': 237 blocksize = 1024; 238 kflag = 1; 239 f_humanize = 0; 240 break; 241 /* The -h option forces all sizes to be measured in bytes. */ 242 case 'h': 243 f_humanize = 1; 244 kflag = 0; 245 f_commas = 0; 246 break; 247 case 'M': 248 f_humanize = 0; 249 f_commas = 1; 250 break; 251 case 'n': 252 f_numericonly = 1; 253 f_longform = 1; 254 f_column = f_columnacross = f_singlecol = f_stream = 0; 255 break; 256 case 'o': 257 f_flags = 1; 258 break; 259 case 'p': 260 f_typedir = 1; 261 break; 262 /* The -q option turns off the -B, -b and -w options. */ 263 case 'q': 264 f_nonprint = 1; 265 f_octal = 0; 266 f_octal_escape = 0; 267 break; 268 case 'r': 269 f_reversesort = 1; 270 break; 271 case 'S': 272 sortkey = BY_SIZE; 273 break; 274 case 's': 275 f_size = 1; 276 break; 277 case 'T': 278 f_sectime = 1; 279 break; 280 case 't': 281 sortkey = BY_TIME; 282 break; 283 case 'W': 284 f_whiteout = 1; 285 break; 286 /* The -w option turns off the -B, -b and -q options. */ 287 case 'w': 288 f_nonprint = 0; 289 f_octal = 0; 290 f_octal_escape = 0; 291 break; 292 default: 293 case '?': 294 usage(); 295 } 296 } 297 argc -= optind; 298 argv += optind; 299 300 if (f_column || f_columnacross || f_stream) { 301 if ((p = getenv("COLUMNS")) != NULL) 302 termwidth = atoi(p); 303 } 304 305 /* 306 * If both -g and -l options, let -l take precedence. 307 */ 308 if (f_grouponly == -1) 309 f_grouponly = 0; 310 311 /* 312 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 313 * information. 314 */ 315 if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir && 316 sortkey == BY_NAME) 317 fts_options |= FTS_NOSTAT; 318 319 /* 320 * If not -F, -d or -l options, follow any symbolic links listed on 321 * the command line. 322 */ 323 if (!f_longform && !f_listdir && !f_type) 324 fts_options |= FTS_COMFOLLOW; 325 326 /* 327 * If -W, show whiteout entries 328 */ 329#ifdef FTS_WHITEOUT 330 if (f_whiteout) 331 fts_options |= FTS_WHITEOUT; 332#endif 333 334 /* If -i, -l, or -s, figure out block size. */ 335 if (f_inode || f_longform || f_size) { 336 if (!kflag) 337 (void)getbsize(NULL, &blocksize); 338 blocksize /= 512; 339 } 340 341 /* Select a sort function. */ 342 if (f_reversesort) { 343 switch (sortkey) { 344 case BY_NAME: 345 sortfcn = revnamecmp; 346 break; 347 case BY_SIZE: 348 sortfcn = revsizecmp; 349 break; 350 case BY_TIME: 351 if (f_accesstime) 352 sortfcn = revacccmp; 353 else if (f_statustime) 354 sortfcn = revstatcmp; 355 else /* Use modification time. */ 356 sortfcn = revmodcmp; 357 break; 358 } 359 } else { 360 switch (sortkey) { 361 case BY_NAME: 362 sortfcn = namecmp; 363 break; 364 case BY_SIZE: 365 sortfcn = sizecmp; 366 break; 367 case BY_TIME: 368 if (f_accesstime) 369 sortfcn = acccmp; 370 else if (f_statustime) 371 sortfcn = statcmp; 372 else /* Use modification time. */ 373 sortfcn = modcmp; 374 break; 375 } 376 } 377 378 /* Select a print function. */ 379 if (f_singlecol) 380 printfcn = printscol; 381 else if (f_columnacross) 382 printfcn = printacol; 383 else if (f_longform) 384 printfcn = printlong; 385 else if (f_stream) 386 printfcn = printstream; 387 else 388 printfcn = printcol; 389 390 if (argc) 391 traverse(argc, argv, fts_options); 392 else 393 traverse(1, dotav, fts_options); 394 return rval; 395 /* NOTREACHED */ 396} 397 398static int output; /* If anything output. */ 399 400/* 401 * Traverse() walks the logical directory structure specified by the argv list 402 * in the order specified by the mastercmp() comparison function. During the 403 * traversal it passes linked lists of structures to display() which represent 404 * a superset (may be exact set) of the files to be displayed. 405 */ 406static void 407traverse(int argc, char *argv[], int options) 408{ 409 FTS *ftsp; 410 FTSENT *p, *chp; 411 int ch_options, error; 412 413 if ((ftsp = 414 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 415 err(EXIT_FAILURE, NULL); 416 417 display(NULL, fts_children(ftsp, 0)); 418 if (f_listdir) { 419 (void)fts_close(ftsp); 420 return; 421 } 422 423 /* 424 * If not recursing down this tree and don't need stat info, just get 425 * the names. 426 */ 427 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 428 429 while ((p = fts_read(ftsp)) != NULL) 430 switch (p->fts_info) { 431 case FTS_DC: 432 warnx("%s: directory causes a cycle", p->fts_name); 433 break; 434 case FTS_DNR: 435 case FTS_ERR: 436 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 437 rval = EXIT_FAILURE; 438 break; 439 case FTS_D: 440 if (p->fts_level != FTS_ROOTLEVEL && 441 p->fts_name[0] == '.' && !f_listdot) 442 break; 443 444 /* 445 * If already output something, put out a newline as 446 * a separator. If multiple arguments, precede each 447 * directory with its name. 448 */ 449 if (output) 450 (void)printf("\n%s:\n", p->fts_path); 451 else if (argc > 1) { 452 (void)printf("%s:\n", p->fts_path); 453 output = 1; 454 } 455 456 chp = fts_children(ftsp, ch_options); 457 display(p, chp); 458 459 if (!f_recursive && chp != NULL) 460 (void)fts_set(ftsp, p, FTS_SKIP); 461 break; 462 } 463 error = errno; 464 (void)fts_close(ftsp); 465 errno = error; 466 if (errno) 467 err(EXIT_FAILURE, "fts_read"); 468} 469 470/* 471 * Display() takes a linked list of FTSENT structures and passes the list 472 * along with any other necessary information to the print function. P 473 * points to the parent directory of the display list. 474 */ 475static void 476display(FTSENT *p, FTSENT *list) 477{ 478 struct stat *sp; 479 DISPLAY d; 480 FTSENT *cur; 481 NAMES *np; 482 u_int64_t btotal, stotal; 483 off_t maxsize; 484 blkcnt_t maxblock; 485 ino_t maxinode; 486 int maxmajor, maxminor; 487 uint32_t maxnlink; 488 int bcfile, entries, flen, glen, ulen, maxflags, maxgroup; 489 unsigned int maxlen; 490 int maxuser, needstats; 491 const char *user, *group; 492 char buf[21]; /* 64 bits == 20 digits, +1 for NUL */ 493 char nuser[12], ngroup[12]; 494 char *flags = NULL; 495 496 /* 497 * If list is NULL there are two possibilities: that the parent 498 * directory p has no children, or that fts_children() returned an 499 * error. We ignore the error case since it will be replicated 500 * on the next call to fts_read() on the post-order visit to the 501 * directory p, and will be signalled in traverse(). 502 */ 503 if (list == NULL) 504 return; 505 506 needstats = f_inode || f_longform || f_size; 507 flen = 0; 508 maxinode = maxnlink = 0; 509 bcfile = 0; 510 maxuser = maxgroup = maxflags = maxlen = 0; 511 btotal = stotal = maxblock = maxsize = 0; 512 maxmajor = maxminor = 0; 513 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 514 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 515 warnx("%s: %s", 516 cur->fts_name, strerror(cur->fts_errno)); 517 cur->fts_number = NO_PRINT; 518 rval = EXIT_FAILURE; 519 continue; 520 } 521 522 /* 523 * P is NULL if list is the argv list, to which different rules 524 * apply. 525 */ 526 if (p == NULL) { 527 /* Directories will be displayed later. */ 528 if (cur->fts_info == FTS_D && !f_listdir) { 529 cur->fts_number = NO_PRINT; 530 continue; 531 } 532 } else { 533 /* Only display dot file if -a/-A set. */ 534 if (cur->fts_name[0] == '.' && !f_listdot) { 535 cur->fts_number = NO_PRINT; 536 continue; 537 } 538 } 539 if (cur->fts_namelen > maxlen) 540 maxlen = cur->fts_namelen; 541 if (needstats) { 542 sp = cur->fts_statp; 543 if (sp->st_blocks > maxblock) 544 maxblock = sp->st_blocks; 545 if (sp->st_ino > maxinode) 546 maxinode = sp->st_ino; 547 if (sp->st_nlink > maxnlink) 548 maxnlink = sp->st_nlink; 549 if (sp->st_size > maxsize) 550 maxsize = sp->st_size; 551 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 552 bcfile = 1; 553 if (major(sp->st_rdev) > maxmajor) 554 maxmajor = major(sp->st_rdev); 555 if (minor(sp->st_rdev) > maxminor) 556 maxminor = minor(sp->st_rdev); 557 } 558 559 btotal += sp->st_blocks; 560 stotal += sp->st_size; 561 if (f_longform) { 562 if (f_numericonly || 563 (user = user_from_uid(sp->st_uid, 0)) == 564 NULL) { 565 (void)snprintf(nuser, sizeof(nuser), 566 "%u", sp->st_uid); 567 user = nuser; 568 } 569 if (f_numericonly || 570 (group = group_from_gid(sp->st_gid, 0)) == 571 NULL) { 572 (void)snprintf(ngroup, sizeof(ngroup), 573 "%u", sp->st_gid); 574 group = ngroup; 575 } 576 if ((ulen = strlen(user)) > maxuser) 577 maxuser = ulen; 578 if ((glen = strlen(group)) > maxgroup) 579 maxgroup = glen; 580 if (f_flags) { 581 flags = 582 flags_to_string((u_long)sp->st_flags, "-"); 583 if ((flen = strlen(flags)) > maxflags) 584 maxflags = flen; 585 } else 586 flen = 0; 587 588 if ((np = malloc(sizeof(NAMES) + 589 ulen + glen + flen + 2)) == NULL) 590 err(EXIT_FAILURE, NULL); 591 592 np->user = &np->data[0]; 593 (void)strcpy(np->user, user); 594 np->group = &np->data[ulen + 1]; 595 (void)strcpy(np->group, group); 596 597 if (f_flags) { 598 np->flags = &np->data[ulen + glen + 2]; 599 (void)strcpy(np->flags, flags); 600 free(flags); 601 } 602 cur->fts_pointer = np; 603 } 604 } 605 ++entries; 606 } 607 608 if (!entries) 609 return; 610 611 d.list = list; 612 d.entries = entries; 613 d.maxlen = maxlen; 614 if (needstats) { 615 d.btotal = btotal; 616 d.stotal = stotal; 617 if (f_humanize) { 618 d.s_block = 4; /* min buf length for humanize_number */ 619 } else { 620 (void)snprintf(buf, sizeof(buf), "%llu", 621 (long long)howmany(maxblock, blocksize)); 622 d.s_block = strlen(buf); 623 if (f_commas) /* allow for commas before every third digit */ 624 d.s_block += (d.s_block - 1) / 3; 625 } 626 d.s_flags = maxflags; 627 d.s_group = maxgroup; 628 (void)snprintf(buf, sizeof(buf), "%llu", 629 (unsigned long long)maxinode); 630 d.s_inode = strlen(buf); 631 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 632 d.s_nlink = strlen(buf); 633 if (f_humanize) { 634 d.s_size = 4; /* min buf length for humanize_number */ 635 } else { 636 (void)snprintf(buf, sizeof(buf), "%llu", 637 (long long)maxsize); 638 d.s_size = strlen(buf); 639 if (f_commas) /* allow for commas before every third digit */ 640 d.s_size += (d.s_size - 1) / 3; 641 } 642 d.s_user = maxuser; 643 if (bcfile) { 644 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 645 d.s_major = strlen(buf); 646 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 647 d.s_minor = strlen(buf); 648 if (d.s_major + d.s_minor + 2 > d.s_size) 649 d.s_size = d.s_major + d.s_minor + 2; 650 else if (d.s_size - d.s_minor - 2 > d.s_major) 651 d.s_major = d.s_size - d.s_minor - 2; 652 } else { 653 d.s_major = 0; 654 d.s_minor = 0; 655 } 656 } 657 658 printfcn(&d); 659 output = 1; 660 661 if (f_longform) 662 for (cur = list; cur; cur = cur->fts_link) 663 free(cur->fts_pointer); 664} 665 666/* 667 * Ordering for mastercmp: 668 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 669 * as larger than directories. Within either group, use the sort function. 670 * All other levels use the sort function. Error entries remain unsorted. 671 */ 672static int 673mastercmp(const FTSENT **a, const FTSENT **b) 674{ 675 int a_info, b_info; 676 677 a_info = (*a)->fts_info; 678 if (a_info == FTS_ERR) 679 return (0); 680 b_info = (*b)->fts_info; 681 if (b_info == FTS_ERR) 682 return (0); 683 684 if (a_info == FTS_NS || b_info == FTS_NS) { 685 if (b_info != FTS_NS) 686 return (1); 687 else if (a_info != FTS_NS) 688 return (-1); 689 else 690 return (namecmp(*a, *b)); 691 } 692 693 if (a_info != b_info && !f_listdir && 694 (*a)->fts_level == FTS_ROOTLEVEL) { 695 if (a_info == FTS_D) 696 return (1); 697 else if (b_info == FTS_D) 698 return (-1); 699 } 700 return (sortfcn(*a, *b)); 701} 702