ls.c revision 1.46
1/* $NetBSD: ls.c,v 1.46 2003/05/07 13:00:24 grant 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 1.46 2003/05/07 13:00:24 grant 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_grouponly; /* long listing without owner */ 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_recursive; /* ls subdirectories also */ 103int f_reversesort; /* reverse whatever sort is used */ 104int f_sectime; /* print the real time for all files */ 105int f_singlecol; /* use single column output */ 106int f_size; /* list size in short listing */ 107int f_statustime; /* use time of last mode change */ 108int f_stream; /* stream format */ 109int f_type; /* add type character for non-regular files */ 110int f_typedir; /* add type character for directories */ 111int f_whiteout; /* show whiteout entries */ 112 113int 114ls_main(int argc, char *argv[]) 115{ 116 static char dot[] = ".", *dotav[] = { dot, NULL }; 117 struct winsize win; 118 int ch, fts_options, notused; 119 int kflag = 0; 120 const char *p; 121 122 setlocale(LC_ALL, ""); 123 124 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 125 if (isatty(STDOUT_FILENO)) { 126 if ((p = getenv("COLUMNS")) != NULL) 127 termwidth = atoi(p); 128 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 129 win.ws_col > 0) 130 termwidth = win.ws_col; 131 f_column = f_nonprint = 1; 132 } else 133 f_singlecol = 1; 134 135 /* Root is -A automatically. */ 136 if (!getuid()) 137 f_listdot = 1; 138 139 fts_options = FTS_PHYSICAL; 140 while ((ch = getopt(argc, argv, "1ACFLRSTWacdfgiklmnopqrstux")) != -1) { 141 switch (ch) { 142 /* 143 * The -1, -C, -l, -m and -x options all override each other so 144 * shell aliasing works correctly. 145 */ 146 case '1': 147 f_singlecol = 1; 148 f_column = f_columnacross = f_longform = f_stream = 0; 149 break; 150 case 'C': 151 f_column = 1; 152 f_columnacross = f_longform = f_singlecol = f_stream = 153 0; 154 break; 155 /* The -g option implies -l */ 156 case 'g': 157 f_grouponly = 1; 158 case 'l': 159 f_longform = 1; 160 f_column = f_columnacross = f_singlecol = f_stream = 0; 161 break; 162 case 'm': 163 f_stream = 1; 164 f_column = f_columnacross = f_longform = f_singlecol = 165 0; 166 break; 167 case 'x': 168 f_columnacross = 1; 169 f_column = f_longform = f_singlecol = f_stream = 0; 170 break; 171 /* The -c and -u options override each other. */ 172 case 'c': 173 f_statustime = 1; 174 f_accesstime = 0; 175 break; 176 case 'u': 177 f_accesstime = 1; 178 f_statustime = 0; 179 break; 180 case 'F': 181 f_type = 1; 182 break; 183 case 'L': 184 fts_options &= ~FTS_PHYSICAL; 185 fts_options |= FTS_LOGICAL; 186 break; 187 case 'R': 188 f_recursive = 1; 189 break; 190 case 'a': 191 fts_options |= FTS_SEEDOT; 192 /* FALLTHROUGH */ 193 case 'A': 194 f_listdot = 1; 195 break; 196 /* The -d option turns off the -R option. */ 197 case 'd': 198 f_listdir = 1; 199 f_recursive = 0; 200 break; 201 case 'f': 202 f_nosort = 1; 203 break; 204 case 'i': 205 f_inode = 1; 206 break; 207 case 'k': 208 blocksize = 1024; 209 kflag = 1; 210 break; 211 case 'n': 212 f_numericonly = 1; 213 break; 214 case 'o': 215 f_flags = 1; 216 break; 217 case 'p': 218 f_typedir = 1; 219 break; 220 case 'q': 221 f_nonprint = 1; 222 break; 223 case 'r': 224 f_reversesort = 1; 225 break; 226 case 'S': 227 sortkey = BY_SIZE; 228 break; 229 case 's': 230 f_size = 1; 231 break; 232 case 'T': 233 f_sectime = 1; 234 break; 235 case 't': 236 sortkey = BY_TIME; 237 break; 238 case 'W': 239 f_whiteout = 1; 240 break; 241 default: 242 case '?': 243 usage(); 244 } 245 } 246 argc -= optind; 247 argv += optind; 248 249 /* 250 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 251 * information. 252 */ 253 if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir && 254 sortkey == BY_NAME) 255 fts_options |= FTS_NOSTAT; 256 257 /* 258 * If not -F, -d or -l options, follow any symbolic links listed on 259 * the command line. 260 */ 261 if (!f_longform && !f_listdir && !f_type) 262 fts_options |= FTS_COMFOLLOW; 263 264 /* 265 * If -W, show whiteout entries 266 */ 267#ifdef FTS_WHITEOUT 268 if (f_whiteout) 269 fts_options |= FTS_WHITEOUT; 270#endif 271 272 /* If -l or -s, figure out block size. */ 273 if (f_inode || f_longform || f_size) { 274 if (!kflag) 275 (void)getbsize(¬used, &blocksize); 276 blocksize /= 512; 277 } 278 279 /* Select a sort function. */ 280 if (f_reversesort) { 281 switch (sortkey) { 282 case BY_NAME: 283 sortfcn = revnamecmp; 284 break; 285 case BY_SIZE: 286 sortfcn = revsizecmp; 287 break; 288 case BY_TIME: 289 if (f_accesstime) 290 sortfcn = revacccmp; 291 else if (f_statustime) 292 sortfcn = revstatcmp; 293 else /* Use modification time. */ 294 sortfcn = revmodcmp; 295 break; 296 } 297 } else { 298 switch (sortkey) { 299 case BY_NAME: 300 sortfcn = namecmp; 301 break; 302 case BY_SIZE: 303 sortfcn = sizecmp; 304 break; 305 case BY_TIME: 306 if (f_accesstime) 307 sortfcn = acccmp; 308 else if (f_statustime) 309 sortfcn = statcmp; 310 else /* Use modification time. */ 311 sortfcn = modcmp; 312 break; 313 } 314 } 315 316 /* Select a print function. */ 317 if (f_singlecol) 318 printfcn = printscol; 319 else if (f_columnacross) 320 printfcn = printacol; 321 else if (f_longform) 322 printfcn = printlong; 323 else if (f_stream) 324 printfcn = printstream; 325 else 326 printfcn = printcol; 327 328 if (argc) 329 traverse(argc, argv, fts_options); 330 else 331 traverse(1, dotav, fts_options); 332 exit(rval); 333 /* NOTREACHED */ 334} 335 336static int output; /* If anything output. */ 337 338/* 339 * Traverse() walks the logical directory structure specified by the argv list 340 * in the order specified by the mastercmp() comparison function. During the 341 * traversal it passes linked lists of structures to display() which represent 342 * a superset (may be exact set) of the files to be displayed. 343 */ 344static void 345traverse(int argc, char *argv[], int options) 346{ 347 FTS *ftsp; 348 FTSENT *p, *chp; 349 int ch_options; 350 351 if ((ftsp = 352 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 353 err(EXIT_FAILURE, NULL); 354 355 display(NULL, fts_children(ftsp, 0)); 356 if (f_listdir) 357 return; 358 359 /* 360 * If not recursing down this tree and don't need stat info, just get 361 * the names. 362 */ 363 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 364 365 while ((p = fts_read(ftsp)) != NULL) 366 switch (p->fts_info) { 367 case FTS_DC: 368 warnx("%s: directory causes a cycle", p->fts_name); 369 break; 370 case FTS_DNR: 371 case FTS_ERR: 372 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 373 rval = EXIT_FAILURE; 374 break; 375 case FTS_D: 376 if (p->fts_level != FTS_ROOTLEVEL && 377 p->fts_name[0] == '.' && !f_listdot) 378 break; 379 380 /* 381 * If already output something, put out a newline as 382 * a separator. If multiple arguments, precede each 383 * directory with its name. 384 */ 385 if (output) 386 (void)printf("\n%s:\n", p->fts_path); 387 else if (argc > 1) { 388 (void)printf("%s:\n", p->fts_path); 389 output = 1; 390 } 391 392 chp = fts_children(ftsp, ch_options); 393 display(p, chp); 394 395 if (!f_recursive && chp != NULL) 396 (void)fts_set(ftsp, p, FTS_SKIP); 397 break; 398 } 399 if (errno) 400 err(EXIT_FAILURE, "fts_read"); 401} 402 403/* 404 * Display() takes a linked list of FTSENT structures and passes the list 405 * along with any other necessary information to the print function. P 406 * points to the parent directory of the display list. 407 */ 408static void 409display(FTSENT *p, FTSENT *list) 410{ 411 struct stat *sp; 412 DISPLAY d; 413 FTSENT *cur; 414 NAMES *np; 415 u_int64_t btotal, maxblock, maxsize; 416 int maxinode, maxnlink, maxmajor, maxminor; 417 int bcfile, entries, flen, glen, ulen, maxflags, maxgroup, maxlen; 418 int maxuser, needstats; 419 const char *user, *group; 420 char buf[21]; /* 64 bits == 20 digits, +1 for NUL */ 421 char nuser[12], ngroup[12]; 422 char *flags = NULL; 423 424#ifdef __GNUC__ 425 /* This outrageous construct just to shut up a GCC warning. */ 426 (void) &maxsize; 427#endif 428 429 /* 430 * If list is NULL there are two possibilities: that the parent 431 * directory p has no children, or that fts_children() returned an 432 * error. We ignore the error case since it will be replicated 433 * on the next call to fts_read() on the post-order visit to the 434 * directory p, and will be signalled in traverse(). 435 */ 436 if (list == NULL) 437 return; 438 439 needstats = f_inode || f_longform || f_size; 440 flen = 0; 441 maxinode = maxnlink = 0; 442 bcfile = 0; 443 maxuser = maxgroup = maxflags = maxlen = 0; 444 btotal = maxblock = maxsize = 0; 445 maxmajor = maxminor = 0; 446 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 447 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 448 warnx("%s: %s", 449 cur->fts_name, strerror(cur->fts_errno)); 450 cur->fts_number = NO_PRINT; 451 rval = EXIT_FAILURE; 452 continue; 453 } 454 455 /* 456 * P is NULL if list is the argv list, to which different rules 457 * apply. 458 */ 459 if (p == NULL) { 460 /* Directories will be displayed later. */ 461 if (cur->fts_info == FTS_D && !f_listdir) { 462 cur->fts_number = NO_PRINT; 463 continue; 464 } 465 } else { 466 /* Only display dot file if -a/-A set. */ 467 if (cur->fts_name[0] == '.' && !f_listdot) { 468 cur->fts_number = NO_PRINT; 469 continue; 470 } 471 } 472 if (cur->fts_namelen > maxlen) 473 maxlen = cur->fts_namelen; 474 if (needstats) { 475 sp = cur->fts_statp; 476 if (sp->st_blocks > maxblock) 477 maxblock = sp->st_blocks; 478 if (sp->st_ino > maxinode) 479 maxinode = sp->st_ino; 480 if (sp->st_nlink > maxnlink) 481 maxnlink = sp->st_nlink; 482 if (sp->st_size > maxsize) 483 maxsize = sp->st_size; 484 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 485 bcfile = 1; 486 if (major(sp->st_rdev) > maxmajor) 487 maxmajor = major(sp->st_rdev); 488 if (minor(sp->st_rdev) > maxminor) 489 maxminor = minor(sp->st_rdev); 490 } 491 492 btotal += sp->st_blocks; 493 if (f_longform) { 494 if (f_numericonly || 495 (user = user_from_uid(sp->st_uid, 0)) == 496 NULL) { 497 (void)snprintf(nuser, sizeof(nuser), 498 "%u", sp->st_uid); 499 user = nuser; 500 } 501 if (f_numericonly || 502 (group = group_from_gid(sp->st_gid, 0)) == 503 NULL) { 504 (void)snprintf(ngroup, sizeof(ngroup), 505 "%u", sp->st_gid); 506 group = ngroup; 507 } 508 if ((ulen = strlen(user)) > maxuser) 509 maxuser = ulen; 510 if ((glen = strlen(group)) > maxgroup) 511 maxgroup = glen; 512 if (f_flags) { 513 flags = 514 flags_to_string(sp->st_flags, "-"); 515 if ((flen = strlen(flags)) > maxflags) 516 maxflags = flen; 517 } else 518 flen = 0; 519 520 if ((np = malloc(sizeof(NAMES) + 521 ulen + glen + flen + 3)) == NULL) 522 err(EXIT_FAILURE, NULL); 523 524 np->user = &np->data[0]; 525 (void)strcpy(np->user, user); 526 np->group = &np->data[ulen + 1]; 527 (void)strcpy(np->group, group); 528 529 if (f_flags) { 530 np->flags = &np->data[ulen + glen + 2]; 531 (void)strcpy(np->flags, flags); 532 } 533 cur->fts_pointer = np; 534 } 535 } 536 ++entries; 537 } 538 539 if (!entries) 540 return; 541 542 d.list = list; 543 d.entries = entries; 544 d.maxlen = maxlen; 545 if (needstats) { 546 d.btotal = btotal; 547 (void)snprintf(buf, sizeof(buf), "%llu", 548 (long long)howmany(maxblock, blocksize)); 549 d.s_block = strlen(buf); 550 d.s_flags = maxflags; 551 d.s_group = maxgroup; 552 (void)snprintf(buf, sizeof(buf), "%u", maxinode); 553 d.s_inode = strlen(buf); 554 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 555 d.s_nlink = strlen(buf); 556 (void)snprintf(buf, sizeof(buf), "%llu", (long long)maxsize); 557 d.s_size = strlen(buf); 558 d.s_user = maxuser; 559 if (bcfile) { 560 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 561 d.s_major = strlen(buf); 562 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 563 d.s_minor = strlen(buf); 564 if (d.s_major + d.s_minor + 2 > d.s_size) 565 d.s_size = d.s_major + d.s_minor + 2; 566 else if (d.s_size - d.s_minor - 2 > d.s_major) 567 d.s_major = d.s_size - d.s_minor - 2; 568 } else { 569 d.s_major = 0; 570 d.s_minor = 0; 571 } 572 } 573 574 printfcn(&d); 575 output = 1; 576 577 if (f_longform) 578 for (cur = list; cur; cur = cur->fts_link) 579 free(cur->fts_pointer); 580} 581 582/* 583 * Ordering for mastercmp: 584 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 585 * as larger than directories. Within either group, use the sort function. 586 * All other levels use the sort function. Error entries remain unsorted. 587 */ 588static int 589mastercmp(const FTSENT **a, const FTSENT **b) 590{ 591 int a_info, b_info; 592 593 a_info = (*a)->fts_info; 594 if (a_info == FTS_ERR) 595 return (0); 596 b_info = (*b)->fts_info; 597 if (b_info == FTS_ERR) 598 return (0); 599 600 if (a_info == FTS_NS || b_info == FTS_NS) { 601 if (b_info != FTS_NS) 602 return (1); 603 else if (a_info != FTS_NS) 604 return (-1); 605 else 606 return (namecmp(*a, *b)); 607 } 608 609 if (a_info != b_info && !f_listdir && 610 (*a)->fts_level == FTS_ROOTLEVEL) { 611 if (a_info == FTS_D) 612 return (1); 613 else if (b_info == FTS_D) 614 return (-1); 615 } 616 return (sortfcn(*a, *b)); 617} 618