1 /* $OpenBSD: ls.c,v 1.33 2008/12/30 15:37:30 otto Exp $ */ 2 /* $NetBSD: ls.c,v 1.18 1996/07/09 09:16:29 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1989, 1993, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Michael Fischbein. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 static char copyright[] = 38 "@(#) Copyright (c) 1989, 1993, 1994\n\ 39 The Regents of the University of California. All rights reserved.\n"; 40 #endif /* not lint */ 41 42 #ifndef lint 43 #if 0 44 static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 45 #else 46 static char rcsid[] = "$OpenBSD: ls.c,v 1.33 2008/12/30 15:37:30 otto Exp $"; 47 #endif 48 #endif /* not lint */ 49 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 <grp.h> 59 #include <pwd.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 #include <util.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 84 /* flags */ 85 int f_accesstime; /* use time of last access */ 86 int f_column; /* columnated format */ 87 int f_columnacross; /* columnated format, sorted across */ 88 int f_flags; /* show flags associated with a file */ 89 int f_grouponly; /* long listing format without owner */ 90 int f_humanval; /* show human-readable file sizes */ 91 int f_inode; /* print inode */ 92 int f_listdir; /* list actual directory, not contents */ 93 int f_listdot; /* list files beginning with . */ 94 int f_longform; /* long listing format */ 95 int f_nonprint; /* show unprintables as ? */ 96 int f_nosort; /* don't sort output */ 97 int f_numericonly; /* don't expand uid to symbolic name */ 98 int f_recursive; /* ls subdirectories also */ 99 int f_reversesort; /* reverse whatever sort is used */ 100 int f_sectime; /* print the real time for all files */ 101 int f_singlecol; /* use single column output */ 102 int f_size; /* list size in short listing */ 103 int f_statustime; /* use time of last mode change */ 104 int f_stream; /* stream format */ 105 int f_type; /* add type character for non-regular files */ 106 int f_typedir; /* add type character for directories */ 107 108 int rval; 109 110 int 111 ls_main(int argc, char *argv[]) 112 { 113 static char dot[] = ".", *dotav[] = { dot, NULL }; 114 struct winsize win; 115 int ch, fts_options, notused; 116 int kflag = 0; 117 char *p; 118 119 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 120 if (isatty(STDOUT_FILENO)) { 121 if ((p = getenv("COLUMNS")) != NULL) 122 termwidth = atoi(p); 123 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 124 win.ws_col > 0) 125 termwidth = win.ws_col; 126 f_column = f_nonprint = 1; 127 } else 128 f_singlecol = 1; 129 130 /* Root is -A automatically. */ 131 if (!getuid()) 132 f_listdot = 1; 133 134 fts_options = FTS_PHYSICAL; 135 while ((ch = getopt(argc, argv, "1ACFLRSTacdfghiklmnopqrstux")) != -1) { 136 switch (ch) { 137 /* 138 * The -1, -C and -l, -m, -n and -x options all override each 139 * other so shell aliasing works right. 140 */ 141 case '1': 142 f_singlecol = 1; 143 f_column = f_columnacross = f_longform = 0; 144 f_numericonly = f_stream = 0; 145 break; 146 case 'C': 147 f_column = 1; 148 f_columnacross = f_longform = f_numericonly = 0; 149 f_singlecol = f_stream = 0; 150 break; 151 case 'g': 152 f_longform = 1; 153 if (f_grouponly != -1) 154 f_grouponly = 1; 155 f_column = f_columnacross = f_singlecol = f_stream = 0; 156 break; 157 case 'l': 158 f_longform = 1; 159 f_grouponly = -1; /* -l always overrides -g */ 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 = 0; 165 f_numericonly = f_singlecol = 0; 166 break; 167 case 'x': 168 f_columnacross = 1; 169 f_column = f_longform = f_numericonly = 0; 170 f_singlecol = f_stream = 0; 171 break; 172 case 'n': 173 f_longform = 1; 174 f_numericonly = 1; 175 f_column = f_columnacross = f_singlecol = f_stream = 0; 176 break; 177 /* The -c and -u options override each other. */ 178 case 'c': 179 f_statustime = 1; 180 f_accesstime = 0; 181 break; 182 case 'u': 183 f_accesstime = 1; 184 f_statustime = 0; 185 break; 186 case 'F': 187 f_type = 1; 188 break; 189 case 'L': 190 fts_options &= ~FTS_PHYSICAL; 191 fts_options |= FTS_LOGICAL; 192 break; 193 case 'R': 194 f_recursive = 1; 195 break; 196 case 'a': 197 fts_options |= FTS_SEEDOT; 198 /* FALLTHROUGH */ 199 case 'A': 200 f_listdot = 1; 201 break; 202 /* The -d option turns off the -R option. */ 203 case 'd': 204 f_listdir = 1; 205 f_recursive = 0; 206 break; 207 case 'f': 208 f_nosort = 1; 209 break; 210 case 'h': 211 f_humanval = 1; 212 break; 213 case 'i': 214 f_inode = 1; 215 break; 216 case 'k': 217 blocksize = 1024; 218 kflag = 1; 219 break; 220 case 'o': 221 f_flags = 1; 222 break; 223 case 'p': 224 f_typedir = 1; 225 break; 226 case 'q': 227 f_nonprint = 1; 228 break; 229 case 'r': 230 f_reversesort = 1; 231 break; 232 case 'S': 233 sortkey = BY_SIZE; 234 break; 235 case 's': 236 f_size = 1; 237 break; 238 case 'T': 239 f_sectime = 1; 240 break; 241 case 't': 242 sortkey = BY_TIME; 243 break; 244 default: 245 usage(); 246 } 247 } 248 argc -= optind; 249 argv += optind; 250 251 /* 252 * If both -g and -l options, let -l take precedence. 253 * This preserves compatibility with the historic BSD ls -lg. 254 */ 255 if (f_grouponly == -1) 256 f_grouponly = 0; 257 258 /* 259 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 260 * information. 261 */ 262 if (!f_longform && !f_inode && !f_size && !f_type && !f_typedir && 263 sortkey == BY_NAME) 264 fts_options |= FTS_NOSTAT; 265 266 /* 267 * If not -F, -d or -l options, follow any symbolic links listed on 268 * the command line. 269 */ 270 if (!f_longform && !f_listdir && !f_type) 271 fts_options |= FTS_COMFOLLOW; 272 273 /* If -l or -s, figure out block size. */ 274 if (f_longform || f_size) { 275 if (!kflag) 276 (void)getbsize(¬used, &blocksize); 277 blocksize /= 512; 278 } 279 280 /* Select a sort function. */ 281 if (f_reversesort) { 282 switch (sortkey) { 283 case BY_NAME: 284 sortfcn = revnamecmp; 285 break; 286 case BY_SIZE: 287 sortfcn = revsizecmp; 288 break; 289 case BY_TIME: 290 if (f_accesstime) 291 sortfcn = revacccmp; 292 else if (f_statustime) 293 sortfcn = revstatcmp; 294 else /* Use modification time. */ 295 sortfcn = revmodcmp; 296 break; 297 } 298 } else { 299 switch (sortkey) { 300 case BY_NAME: 301 sortfcn = namecmp; 302 break; 303 case BY_SIZE: 304 sortfcn = sizecmp; 305 break; 306 case BY_TIME: 307 if (f_accesstime) 308 sortfcn = acccmp; 309 else if (f_statustime) 310 sortfcn = statcmp; 311 else /* Use modification time. */ 312 sortfcn = modcmp; 313 break; 314 } 315 } 316 317 /* Select a print function. */ 318 if (f_singlecol) 319 printfcn = printscol; 320 else if (f_columnacross) 321 printfcn = printacol; 322 else if (f_longform) 323 printfcn = printlong; 324 else if (f_stream) 325 printfcn = printstream; 326 else 327 printfcn = printcol; 328 329 if (argc) 330 traverse(argc, argv, fts_options); 331 else 332 traverse(1, dotav, fts_options); 333 return (rval); 334 } 335 336 static 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 */ 344 static void 345 traverse(int argc, char *argv[], int options) 346 { 347 FTS *ftsp; 348 FTSENT *p, *chp; 349 int ch_options, saved_errno; 350 351 if ((ftsp = 352 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 353 err(1, 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_D: 368 if (p->fts_name[0] == '.' && 369 p->fts_level != FTS_ROOTLEVEL && !f_listdot) 370 break; 371 372 /* 373 * If already output something, put out a newline as 374 * a separator. If multiple arguments, precede each 375 * directory with its name. 376 */ 377 if (output) 378 (void)printf("\n%s:\n", p->fts_path); 379 else if (argc > 1) { 380 (void)printf("%s:\n", p->fts_path); 381 output = 1; 382 } 383 384 chp = fts_children(ftsp, ch_options); 385 saved_errno = errno; 386 display(p, chp); 387 388 /* 389 * On fts_children() returning error do recurse to see 390 * the error. 391 */ 392 if (!f_recursive && !(chp == NULL && saved_errno != 0)) 393 (void)fts_set(ftsp, p, FTS_SKIP); 394 break; 395 case FTS_DC: 396 warnx("%s: directory causes a cycle", p->fts_name); 397 break; 398 case FTS_DNR: 399 case FTS_ERR: 400 warnx("%s: %s", p->fts_name[0] == '\0' ? p->fts_path : 401 p->fts_name, strerror(p->fts_errno)); 402 rval = 1; 403 break; 404 } 405 if (errno) 406 err(1, "fts_read"); 407 } 408 409 /* 410 * Display() takes a linked list of FTSENT structures and passes the list 411 * along with any other necessary information to the print function. P 412 * points to the parent directory of the display list. 413 */ 414 static void 415 display(FTSENT *p, FTSENT *list) 416 { 417 struct stat *sp; 418 DISPLAY d; 419 FTSENT *cur; 420 NAMES *np; 421 off_t maxsize; 422 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 423 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 424 int entries, needstats; 425 char *user, *group, buf[21]; /* 64 bits == 20 digits */ 426 char nuser[12], ngroup[12]; 427 char *flags = NULL; 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 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 442 bcfile = 0; 443 maxuser = maxgroup = maxflags = 0; 444 maxsize = 0; 445 for (cur = list, entries = 0; cur != NULL; cur = cur->fts_link) { 446 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 447 warnx("%s: %s", 448 cur->fts_name, strerror(cur->fts_errno)); 449 cur->fts_number = NO_PRINT; 450 rval = 1; 451 continue; 452 } 453 454 /* 455 * P is NULL if list is the argv list, to which different rules 456 * apply. 457 */ 458 if (p == NULL) { 459 /* Directories will be displayed later. */ 460 if (cur->fts_info == FTS_D && !f_listdir) { 461 cur->fts_number = NO_PRINT; 462 continue; 463 } 464 } else { 465 /* Only display dot file if -a/-A set. */ 466 if (cur->fts_name[0] == '.' && !f_listdot) { 467 cur->fts_number = NO_PRINT; 468 continue; 469 } 470 } 471 if (cur->fts_namelen > maxlen) 472 maxlen = cur->fts_namelen; 473 if (needstats) { 474 sp = cur->fts_statp; 475 if (sp->st_blocks > maxblock) 476 maxblock = sp->st_blocks; 477 if (sp->st_ino > maxinode) 478 maxinode = sp->st_ino; 479 if (sp->st_nlink > maxnlink) 480 maxnlink = sp->st_nlink; 481 if (sp->st_size > maxsize) 482 maxsize = sp->st_size; 483 484 btotal += sp->st_blocks; 485 if (f_longform) { 486 if (f_numericonly) { 487 snprintf(nuser, 12, "%u", sp->st_uid); 488 snprintf(ngroup, 12, "%u", sp->st_gid); 489 user = nuser; 490 group = ngroup; 491 } else { 492 user = user_from_uid(sp->st_uid, 0); 493 group = group_from_gid(sp->st_gid, 0); 494 } 495 if ((ulen = strlen(user)) > maxuser) 496 maxuser = ulen; 497 if ((glen = strlen(group)) > maxgroup) 498 maxgroup = glen; 499 if (f_flags) { 500 flags = fflagstostr(sp->st_flags); 501 if (*flags == '\0') 502 flags = "-"; 503 if ((flen = strlen(flags)) > maxflags) 504 maxflags = flen; 505 } else 506 flen = 0; 507 508 if ((np = malloc(sizeof(NAMES) + 509 ulen + 1 + glen + 1 + flen + 1)) == NULL) 510 err(1, NULL); 511 512 np->user = &np->data[0]; 513 (void)strlcpy(np->user, user, ulen + 1); 514 np->group = &np->data[ulen + 1]; 515 (void)strlcpy(np->group, group, glen + 1); 516 517 if (S_ISCHR(sp->st_mode) || 518 S_ISBLK(sp->st_mode)) 519 bcfile = 1; 520 521 if (f_flags) { 522 np->flags = &np->data[ulen + 1 + glen + 1]; 523 (void)strlcpy(np->flags, flags, flen + 1); 524 if (*flags != '-') 525 free(flags); 526 } 527 cur->fts_pointer = np; 528 } 529 } 530 ++entries; 531 } 532 533 if (!entries) 534 return; 535 536 d.list = list; 537 d.entries = entries; 538 d.maxlen = maxlen; 539 if (needstats) { 540 d.bcfile = bcfile; 541 d.btotal = btotal; 542 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 543 d.s_block = strlen(buf); 544 d.s_flags = maxflags; 545 d.s_group = maxgroup; 546 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 547 d.s_inode = strlen(buf); 548 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 549 d.s_nlink = strlen(buf); 550 if (!f_humanval) { 551 (void)snprintf(buf, sizeof(buf), "%lld", 552 (long long) maxsize); 553 d.s_size = strlen(buf); 554 } else 555 d.s_size = FMT_SCALED_STRSIZE-2; /* no - or '\0' */ 556 d.s_user = maxuser; 557 } 558 559 printfcn(&d); 560 output = 1; 561 562 if (f_longform) 563 for (cur = list; cur != NULL; cur = cur->fts_link) 564 free(cur->fts_pointer); 565 } 566 567 /* 568 * Ordering for mastercmp: 569 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 570 * as larger than directories. Within either group, use the sort function. 571 * All other levels use the sort function. Error entries remain unsorted. 572 */ 573 static int 574 mastercmp(const FTSENT **a, const FTSENT **b) 575 { 576 int a_info, b_info; 577 578 a_info = (*a)->fts_info; 579 if (a_info == FTS_ERR) 580 return (0); 581 b_info = (*b)->fts_info; 582 if (b_info == FTS_ERR) 583 return (0); 584 585 if (a_info == FTS_NS || b_info == FTS_NS) { 586 if (b_info != FTS_NS) 587 return (1); 588 else if (a_info != FTS_NS) 589 return (-1); 590 else 591 return (namecmp(*a, *b)); 592 } 593 594 if (a_info != b_info && 595 (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) { 596 if (a_info == FTS_D) 597 return (1); 598 if (b_info == FTS_D) 599 return (-1); 600 } 601 return (sortfcn(*a, *b)); 602 } 603