ls.c revision 1.62
1/* $NetBSD: ls.c,v 1.62 2006/12/14 14:15:26 christos 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 43static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 44#else 45__RCSID("$NetBSD: ls.c,v 1.62 2006/12/14 14:15:26 christos 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 69static void display(FTSENT *, FTSENT *); 70static int mastercmp(const FTSENT **, const FTSENT **); 71static void traverse(int, char **, int); 72 73static void (*printfcn)(DISPLAY *); 74static int (*sortfcn)(const FTSENT *, const FTSENT *); 75 76#define BY_NAME 0 77#define BY_SIZE 1 78#define BY_TIME 2 79 80long blocksize; /* block size units */ 81int termwidth = 80; /* default terminal width */ 82int sortkey = BY_NAME; 83int rval = EXIT_SUCCESS; /* exit value - set if error encountered */ 84 85/* flags */ 86int f_accesstime; /* use time of last access */ 87int f_column; /* columnated format */ 88int f_columnacross; /* columnated format, sorted across */ 89int f_flags; /* show flags associated with a file */ 90int f_grouponly; /* long listing without owner */ 91int f_humanize; /* humanize the size field */ 92int f_inode; /* print inode */ 93int f_listdir; /* list actual directory, not contents */ 94int f_listdot; /* list files beginning with . */ 95int f_longform; /* long listing format */ 96int f_nonprint; /* show unprintables as ? */ 97int f_nosort; /* don't sort output */ 98int f_numericonly; /* don't convert uid/gid to name */ 99int f_octal; /* print octal escapes for nongraphic characters */ 100int f_octal_escape; /* like f_octal but use C escapes if possible */ 101int f_recursive; /* ls subdirectories also */ 102int f_reversesort; /* reverse whatever sort is used */ 103int f_sectime; /* print the real time for all files */ 104int f_singlecol; /* use single column output */ 105int f_size; /* list size in short listing */ 106int f_statustime; /* use time of last mode change */ 107int f_stream; /* stream format */ 108int f_type; /* add type character for non-regular files */ 109int f_typedir; /* add type character for directories */ 110int f_whiteout; /* show whiteout entries */ 111 112int 113ls_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 (void)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 return rval; 374 /* NOTREACHED */ 375} 376 377static 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 */ 385static void 386traverse(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 (void)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 (void)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 */ 454static void 455display(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 ino_t maxinode; 463 int maxnlink, maxmajor, maxminor; 464 int bcfile, entries, flen, glen, ulen, maxflags, maxgroup, maxlen; 465 int maxuser, needstats; 466 const char *user, *group; 467 char buf[21]; /* 64 bits == 20 digits, +1 for NUL */ 468 char nuser[12], ngroup[12]; 469 char *flags = NULL; 470 471 /* 472 * If list is NULL there are two possibilities: that the parent 473 * directory p has no children, or that fts_children() returned an 474 * error. We ignore the error case since it will be replicated 475 * on the next call to fts_read() on the post-order visit to the 476 * directory p, and will be signalled in traverse(). 477 */ 478 if (list == NULL) 479 return; 480 481 needstats = f_inode || f_longform || f_size; 482 flen = 0; 483 maxinode = maxnlink = 0; 484 bcfile = 0; 485 maxuser = maxgroup = maxflags = maxlen = 0; 486 btotal = stotal = maxblock = maxsize = 0; 487 maxmajor = maxminor = 0; 488 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 489 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 490 warnx("%s: %s", 491 cur->fts_name, strerror(cur->fts_errno)); 492 cur->fts_number = NO_PRINT; 493 rval = EXIT_FAILURE; 494 continue; 495 } 496 497 /* 498 * P is NULL if list is the argv list, to which different rules 499 * apply. 500 */ 501 if (p == NULL) { 502 /* Directories will be displayed later. */ 503 if (cur->fts_info == FTS_D && !f_listdir) { 504 cur->fts_number = NO_PRINT; 505 continue; 506 } 507 } else { 508 /* Only display dot file if -a/-A set. */ 509 if (cur->fts_name[0] == '.' && !f_listdot) { 510 cur->fts_number = NO_PRINT; 511 continue; 512 } 513 } 514 if (cur->fts_namelen > maxlen) 515 maxlen = cur->fts_namelen; 516 if (needstats) { 517 sp = cur->fts_statp; 518 if (sp->st_blocks > maxblock) 519 maxblock = sp->st_blocks; 520 if (sp->st_ino > maxinode) 521 maxinode = sp->st_ino; 522 if (sp->st_nlink > maxnlink) 523 maxnlink = sp->st_nlink; 524 if (sp->st_size > maxsize) 525 maxsize = sp->st_size; 526 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 527 bcfile = 1; 528 if (major(sp->st_rdev) > maxmajor) 529 maxmajor = major(sp->st_rdev); 530 if (minor(sp->st_rdev) > maxminor) 531 maxminor = minor(sp->st_rdev); 532 } 533 534 btotal += sp->st_blocks; 535 stotal += sp->st_size; 536 if (f_longform) { 537 if (f_numericonly || 538 (user = user_from_uid(sp->st_uid, 0)) == 539 NULL) { 540 (void)snprintf(nuser, sizeof(nuser), 541 "%u", sp->st_uid); 542 user = nuser; 543 } 544 if (f_numericonly || 545 (group = group_from_gid(sp->st_gid, 0)) == 546 NULL) { 547 (void)snprintf(ngroup, sizeof(ngroup), 548 "%u", sp->st_gid); 549 group = ngroup; 550 } 551 if ((ulen = strlen(user)) > maxuser) 552 maxuser = ulen; 553 if ((glen = strlen(group)) > maxgroup) 554 maxgroup = glen; 555 if (f_flags) { 556 flags = 557 flags_to_string((u_long)sp->st_flags, "-"); 558 if ((flen = strlen(flags)) > maxflags) 559 maxflags = flen; 560 } else 561 flen = 0; 562 563 if ((np = malloc(sizeof(NAMES) + 564 ulen + glen + flen + 2)) == NULL) 565 err(EXIT_FAILURE, NULL); 566 567 np->user = &np->data[0]; 568 (void)strcpy(np->user, user); 569 np->group = &np->data[ulen + 1]; 570 (void)strcpy(np->group, group); 571 572 if (f_flags) { 573 np->flags = &np->data[ulen + glen + 2]; 574 (void)strcpy(np->flags, flags); 575 } 576 cur->fts_pointer = np; 577 } 578 } 579 ++entries; 580 } 581 582 if (!entries) 583 return; 584 585 d.list = list; 586 d.entries = entries; 587 d.maxlen = maxlen; 588 if (needstats) { 589 d.btotal = btotal; 590 d.stotal = stotal; 591 if (f_humanize) { 592 d.s_block = 4; /* min buf length for humanize_number */ 593 } else { 594 (void)snprintf(buf, sizeof(buf), "%llu", 595 (long long)howmany(maxblock, blocksize)); 596 d.s_block = strlen(buf); 597 } 598 d.s_flags = maxflags; 599 d.s_group = maxgroup; 600 (void)snprintf(buf, sizeof(buf), "%llu", 601 (unsigned long long)maxinode); 602 d.s_inode = strlen(buf); 603 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 604 d.s_nlink = strlen(buf); 605 if (f_humanize) { 606 d.s_size = 4; /* min buf length for humanize_number */ 607 } else { 608 (void)snprintf(buf, sizeof(buf), "%llu", 609 (long long)maxsize); 610 d.s_size = strlen(buf); 611 } 612 d.s_user = maxuser; 613 if (bcfile) { 614 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 615 d.s_major = strlen(buf); 616 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 617 d.s_minor = strlen(buf); 618 if (d.s_major + d.s_minor + 2 > d.s_size) 619 d.s_size = d.s_major + d.s_minor + 2; 620 else if (d.s_size - d.s_minor - 2 > d.s_major) 621 d.s_major = d.s_size - d.s_minor - 2; 622 } else { 623 d.s_major = 0; 624 d.s_minor = 0; 625 } 626 } 627 628 printfcn(&d); 629 output = 1; 630 631 if (f_longform) 632 for (cur = list; cur; cur = cur->fts_link) 633 free(cur->fts_pointer); 634} 635 636/* 637 * Ordering for mastercmp: 638 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 639 * as larger than directories. Within either group, use the sort function. 640 * All other levels use the sort function. Error entries remain unsorted. 641 */ 642static int 643mastercmp(const FTSENT **a, const FTSENT **b) 644{ 645 int a_info, b_info; 646 647 a_info = (*a)->fts_info; 648 if (a_info == FTS_ERR) 649 return (0); 650 b_info = (*b)->fts_info; 651 if (b_info == FTS_ERR) 652 return (0); 653 654 if (a_info == FTS_NS || b_info == FTS_NS) { 655 if (b_info != FTS_NS) 656 return (1); 657 else if (a_info != FTS_NS) 658 return (-1); 659 else 660 return (namecmp(*a, *b)); 661 } 662 663 if (a_info != b_info && !f_listdir && 664 (*a)->fts_level == FTS_ROOTLEVEL) { 665 if (a_info == FTS_D) 666 return (1); 667 else if (b_info == FTS_D) 668 return (-1); 669 } 670 return (sortfcn(*a, *b)); 671} 672