ls.c revision 1.44
1/* $NetBSD: ls.c,v 1.44 2002/09/14 04:25:55 sommerfeld 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 */ 38 39#include <sys/cdefs.h> 40#ifndef lint 41__COPYRIGHT("@(#) Copyright (c) 1989, 1993, 1994\n\ 42 The Regents of the University of California. All rights reserved.\n"); 43#endif /* not lint */ 44 45#ifndef lint 46#if 0 47static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 48#else 49__RCSID("$NetBSD: ls.c,v 1.44 2002/09/14 04:25:55 sommerfeld Exp $"); 50#endif 51#endif /* not lint */ 52 53#include <sys/types.h> 54#include <sys/stat.h> 55#include <sys/ioctl.h> 56 57#include <dirent.h> 58#include <err.h> 59#include <errno.h> 60#include <fts.h> 61#include <locale.h> 62#include <stdio.h> 63#include <stdlib.h> 64#include <string.h> 65#include <unistd.h> 66#include <termios.h> 67#include <pwd.h> 68#include <grp.h> 69 70#include "ls.h" 71#include "extern.h" 72 73static void display(FTSENT *, FTSENT *); 74static int mastercmp(const FTSENT **, const FTSENT **); 75static void traverse(int, char **, int); 76 77static void (*printfcn)(DISPLAY *); 78static int (*sortfcn)(const FTSENT *, const FTSENT *); 79 80#define BY_NAME 0 81#define BY_SIZE 1 82#define BY_TIME 2 83 84long blocksize; /* block size units */ 85int termwidth = 80; /* default terminal width */ 86int sortkey = BY_NAME; 87int rval = EXIT_SUCCESS; /* exit value - set if error encountered */ 88 89/* flags */ 90int f_accesstime; /* use time of last access */ 91int f_column; /* columnated format */ 92int f_columnacross; /* columnated format, sorted across */ 93int f_flags; /* show flags associated with a file */ 94int f_inode; /* print inode */ 95int f_listdir; /* list actual directory, not contents */ 96int f_listdot; /* list files beginning with . */ 97int f_longform; /* long listing format */ 98int f_nonprint; /* show unprintables as ? */ 99int f_nosort; /* don't sort output */ 100int f_numericonly; /* don't convert uid/gid to name */ 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, notused; 118 int kflag = 0; 119 const char *p; 120 121 setlocale(LC_ALL, ""); 122 123 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 124 if (isatty(STDOUT_FILENO)) { 125 if ((p = getenv("COLUMNS")) != NULL) 126 termwidth = atoi(p); 127 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 128 win.ws_col > 0) 129 termwidth = win.ws_col; 130 f_column = f_nonprint = 1; 131 } else 132 f_singlecol = 1; 133 134 /* Root is -A automatically. */ 135 if (!getuid()) 136 f_listdot = 1; 137 138 fts_options = FTS_PHYSICAL; 139 while ((ch = getopt(argc, argv, "1ACFLRSTWacdfgiklmnopqrstux")) != -1) { 140 switch (ch) { 141 /* 142 * The -1, -C, -l, -m and -x options all override each other so 143 * shell aliasing works correctly. 144 */ 145 case '1': 146 f_singlecol = 1; 147 f_column = f_columnacross = f_longform = f_stream = 0; 148 break; 149 case 'C': 150 f_column = 1; 151 f_columnacross = f_longform = f_singlecol = f_stream = 152 0; 153 break; 154 case 'l': 155 f_longform = 1; 156 f_column = f_columnacross = f_singlecol = f_stream = 0; 157 break; 158 case 'm': 159 f_stream = 1; 160 f_column = f_columnacross = f_longform = f_singlecol = 161 0; 162 break; 163 case 'x': 164 f_columnacross = 1; 165 f_column = f_longform = f_singlecol = f_stream = 0; 166 break; 167 /* The -c and -u options override each other. */ 168 case 'c': 169 f_statustime = 1; 170 f_accesstime = 0; 171 break; 172 case 'u': 173 f_accesstime = 1; 174 f_statustime = 0; 175 break; 176 case 'F': 177 f_type = 1; 178 break; 179 case 'L': 180 fts_options &= ~FTS_PHYSICAL; 181 fts_options |= FTS_LOGICAL; 182 break; 183 case 'R': 184 f_recursive = 1; 185 break; 186 case 'a': 187 fts_options |= FTS_SEEDOT; 188 /* FALLTHROUGH */ 189 case 'A': 190 f_listdot = 1; 191 break; 192 /* The -d option turns off the -R option. */ 193 case 'd': 194 f_listdir = 1; 195 f_recursive = 0; 196 break; 197 case 'f': 198 f_nosort = 1; 199 break; 200 case 'g': /* Compatibility with 4.3BSD. */ 201 break; 202 case 'i': 203 f_inode = 1; 204 break; 205 case 'k': 206 blocksize = 1024; 207 kflag = 1; 208 break; 209 case 'n': 210 f_numericonly = 1; 211 break; 212 case 'o': 213 f_flags = 1; 214 break; 215 case 'p': 216 f_typedir = 1; 217 break; 218 case 'q': 219 f_nonprint = 1; 220 break; 221 case 'r': 222 f_reversesort = 1; 223 break; 224 case 'S': 225 sortkey = BY_SIZE; 226 break; 227 case 's': 228 f_size = 1; 229 break; 230 case 'T': 231 f_sectime = 1; 232 break; 233 case 't': 234 sortkey = BY_TIME; 235 break; 236 case 'W': 237 f_whiteout = 1; 238 break; 239 default: 240 case '?': 241 usage(); 242 } 243 } 244 argc -= optind; 245 argv += optind; 246 247 /* 248 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 249 * information. 250 */ 251 if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir && 252 sortkey == BY_NAME) 253 fts_options |= FTS_NOSTAT; 254 255 /* 256 * If not -F, -d or -l options, follow any symbolic links listed on 257 * the command line. 258 */ 259 if (!f_longform && !f_listdir && !f_type) 260 fts_options |= FTS_COMFOLLOW; 261 262 /* 263 * If -W, show whiteout entries 264 */ 265#ifdef FTS_WHITEOUT 266 if (f_whiteout) 267 fts_options |= FTS_WHITEOUT; 268#endif 269 270 /* If -l or -s, figure out block size. */ 271 if (f_longform || f_size) { 272 if (!kflag) 273 (void)getbsize(¬used, &blocksize); 274 blocksize /= 512; 275 } 276 277 /* Select a sort function. */ 278 if (f_reversesort) { 279 switch (sortkey) { 280 case BY_NAME: 281 sortfcn = revnamecmp; 282 break; 283 case BY_SIZE: 284 sortfcn = revsizecmp; 285 break; 286 case BY_TIME: 287 if (f_accesstime) 288 sortfcn = revacccmp; 289 else if (f_statustime) 290 sortfcn = revstatcmp; 291 else /* Use modification time. */ 292 sortfcn = revmodcmp; 293 break; 294 } 295 } else { 296 switch (sortkey) { 297 case BY_NAME: 298 sortfcn = namecmp; 299 break; 300 case BY_SIZE: 301 sortfcn = sizecmp; 302 break; 303 case BY_TIME: 304 if (f_accesstime) 305 sortfcn = acccmp; 306 else if (f_statustime) 307 sortfcn = statcmp; 308 else /* Use modification time. */ 309 sortfcn = modcmp; 310 break; 311 } 312 } 313 314 /* Select a print function. */ 315 if (f_singlecol) 316 printfcn = printscol; 317 else if (f_columnacross) 318 printfcn = printacol; 319 else if (f_longform) 320 printfcn = printlong; 321 else if (f_stream) 322 printfcn = printstream; 323 else 324 printfcn = printcol; 325 326 if (argc) 327 traverse(argc, argv, fts_options); 328 else 329 traverse(1, dotav, fts_options); 330 exit(rval); 331 /* NOTREACHED */ 332} 333 334static int output; /* If anything output. */ 335 336/* 337 * Traverse() walks the logical directory structure specified by the argv list 338 * in the order specified by the mastercmp() comparison function. During the 339 * traversal it passes linked lists of structures to display() which represent 340 * a superset (may be exact set) of the files to be displayed. 341 */ 342static void 343traverse(int argc, char *argv[], int options) 344{ 345 FTS *ftsp; 346 FTSENT *p, *chp; 347 int ch_options; 348 349 if ((ftsp = 350 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 351 err(EXIT_FAILURE, NULL); 352 353 display(NULL, fts_children(ftsp, 0)); 354 if (f_listdir) 355 return; 356 357 /* 358 * If not recursing down this tree and don't need stat info, just get 359 * the names. 360 */ 361 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 362 363 while ((p = fts_read(ftsp)) != NULL) 364 switch (p->fts_info) { 365 case FTS_DC: 366 warnx("%s: directory causes a cycle", p->fts_name); 367 break; 368 case FTS_DNR: 369 case FTS_ERR: 370 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 371 rval = EXIT_FAILURE; 372 break; 373 case FTS_D: 374 if (p->fts_level != FTS_ROOTLEVEL && 375 p->fts_name[0] == '.' && !f_listdot) 376 break; 377 378 /* 379 * If already output something, put out a newline as 380 * a separator. If multiple arguments, precede each 381 * directory with its name. 382 */ 383 if (output) 384 (void)printf("\n%s:\n", p->fts_path); 385 else if (argc > 1) { 386 (void)printf("%s:\n", p->fts_path); 387 output = 1; 388 } 389 390 chp = fts_children(ftsp, ch_options); 391 display(p, chp); 392 393 if (!f_recursive && chp != NULL) 394 (void)fts_set(ftsp, p, FTS_SKIP); 395 break; 396 } 397 if (errno) 398 err(EXIT_FAILURE, "fts_read"); 399} 400 401/* 402 * Display() takes a linked list of FTSENT structures and passes the list 403 * along with any other necessary information to the print function. P 404 * points to the parent directory of the display list. 405 */ 406static void 407display(FTSENT *p, FTSENT *list) 408{ 409 struct stat *sp; 410 DISPLAY d; 411 FTSENT *cur; 412 NAMES *np; 413 u_int64_t btotal, maxblock, maxsize; 414 int maxinode, maxnlink, maxmajor, maxminor; 415 int bcfile, entries, flen, glen, ulen, maxflags, maxgroup, maxlen; 416 int maxuser, needstats; 417 const char *user, *group; 418 char buf[21]; /* 64 bits == 20 digits, +1 for NUL */ 419 char nuser[12], ngroup[12]; 420 char *flags = NULL; 421 422#ifdef __GNUC__ 423 /* This outrageous construct just to shut up a GCC warning. */ 424 (void) &maxsize; 425#endif 426 427 /* 428 * If list is NULL there are two possibilities: that the parent 429 * directory p has no children, or that fts_children() returned an 430 * error. We ignore the error case since it will be replicated 431 * on the next call to fts_read() on the post-order visit to the 432 * directory p, and will be signalled in traverse(). 433 */ 434 if (list == NULL) 435 return; 436 437 needstats = f_inode || f_longform || f_size; 438 flen = 0; 439 maxinode = maxnlink = 0; 440 bcfile = 0; 441 maxuser = maxgroup = maxflags = maxlen = 0; 442 btotal = maxblock = maxsize = 0; 443 maxmajor = maxminor = 0; 444 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 445 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 446 warnx("%s: %s", 447 cur->fts_name, strerror(cur->fts_errno)); 448 cur->fts_number = NO_PRINT; 449 rval = EXIT_FAILURE; 450 continue; 451 } 452 453 /* 454 * P is NULL if list is the argv list, to which different rules 455 * apply. 456 */ 457 if (p == NULL) { 458 /* Directories will be displayed later. */ 459 if (cur->fts_info == FTS_D && !f_listdir) { 460 cur->fts_number = NO_PRINT; 461 continue; 462 } 463 } else { 464 /* Only display dot file if -a/-A set. */ 465 if (cur->fts_name[0] == '.' && !f_listdot) { 466 cur->fts_number = NO_PRINT; 467 continue; 468 } 469 } 470 if (cur->fts_namelen > maxlen) 471 maxlen = cur->fts_namelen; 472 if (needstats) { 473 sp = cur->fts_statp; 474 if (sp->st_blocks > maxblock) 475 maxblock = sp->st_blocks; 476 if (sp->st_ino > maxinode) 477 maxinode = sp->st_ino; 478 if (sp->st_nlink > maxnlink) 479 maxnlink = sp->st_nlink; 480 if (sp->st_size > maxsize) 481 maxsize = sp->st_size; 482 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 483 bcfile = 1; 484 if (major(sp->st_rdev) > maxmajor) 485 maxmajor = major(sp->st_rdev); 486 if (minor(sp->st_rdev) > maxminor) 487 maxminor = minor(sp->st_rdev); 488 } 489 490 btotal += sp->st_blocks; 491 if (f_longform) { 492 if (f_numericonly || 493 (user = user_from_uid(sp->st_uid, 0)) == 494 NULL) { 495 (void)snprintf(nuser, sizeof(nuser), 496 "%u", sp->st_uid); 497 user = nuser; 498 } 499 if (f_numericonly || 500 (group = group_from_gid(sp->st_gid, 0)) == 501 NULL) { 502 (void)snprintf(ngroup, sizeof(ngroup), 503 "%u", sp->st_gid); 504 group = ngroup; 505 } 506 if ((ulen = strlen(user)) > maxuser) 507 maxuser = ulen; 508 if ((glen = strlen(group)) > maxgroup) 509 maxgroup = glen; 510 if (f_flags) { 511 flags = 512 flags_to_string(sp->st_flags, "-"); 513 if ((flen = strlen(flags)) > maxflags) 514 maxflags = flen; 515 } else 516 flen = 0; 517 518 if ((np = malloc(sizeof(NAMES) + 519 ulen + glen + flen + 3)) == NULL) 520 err(EXIT_FAILURE, NULL); 521 522 np->user = &np->data[0]; 523 (void)strcpy(np->user, user); 524 np->group = &np->data[ulen + 1]; 525 (void)strcpy(np->group, group); 526 527 if (f_flags) { 528 np->flags = &np->data[ulen + glen + 2]; 529 (void)strcpy(np->flags, flags); 530 } 531 cur->fts_pointer = np; 532 } 533 } 534 ++entries; 535 } 536 537 if (!entries) 538 return; 539 540 d.list = list; 541 d.entries = entries; 542 d.maxlen = maxlen; 543 if (needstats) { 544 d.btotal = btotal; 545 (void)snprintf(buf, sizeof(buf), "%llu", 546 (long long)howmany(maxblock, blocksize)); 547 d.s_block = strlen(buf); 548 d.s_flags = maxflags; 549 d.s_group = maxgroup; 550 (void)snprintf(buf, sizeof(buf), "%u", maxinode); 551 d.s_inode = strlen(buf); 552 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 553 d.s_nlink = strlen(buf); 554 (void)snprintf(buf, sizeof(buf), "%llu", (long long)maxsize); 555 d.s_size = strlen(buf); 556 d.s_user = maxuser; 557 if (bcfile) { 558 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 559 d.s_major = strlen(buf); 560 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 561 d.s_minor = strlen(buf); 562 if (d.s_major + d.s_minor + 2 > d.s_size) 563 d.s_size = d.s_major + d.s_minor + 2; 564 else if (d.s_size - d.s_minor - 2 > d.s_major) 565 d.s_major = d.s_size - d.s_minor - 2; 566 } else { 567 d.s_major = 0; 568 d.s_minor = 0; 569 } 570 } 571 572 printfcn(&d); 573 output = 1; 574 575 if (f_longform) 576 for (cur = list; cur; cur = cur->fts_link) 577 free(cur->fts_pointer); 578} 579 580/* 581 * Ordering for mastercmp: 582 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 583 * as larger than directories. Within either group, use the sort function. 584 * All other levels use the sort function. Error entries remain unsorted. 585 */ 586static int 587mastercmp(const FTSENT **a, const FTSENT **b) 588{ 589 int a_info, b_info; 590 591 a_info = (*a)->fts_info; 592 if (a_info == FTS_ERR) 593 return (0); 594 b_info = (*b)->fts_info; 595 if (b_info == FTS_ERR) 596 return (0); 597 598 if (a_info == FTS_NS || b_info == FTS_NS) { 599 if (b_info != FTS_NS) 600 return (1); 601 else if (a_info != FTS_NS) 602 return (-1); 603 else 604 return (namecmp(*a, *b)); 605 } 606 607 if (a_info != b_info && !f_listdir && 608 (*a)->fts_level == FTS_ROOTLEVEL) { 609 if (a_info == FTS_D) 610 return (1); 611 else if (b_info == FTS_D) 612 return (-1); 613 } 614 return (sortfcn(*a, *b)); 615} 616