1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Michael Fischbein. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static const char copyright[] = 39 "@(#) Copyright (c) 1989, 1993, 1994\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41 #endif /* not lint */ 42 43 #ifndef lint 44 #if 0 45 static char sccsid[] = "@(#)ls.c 8.5 (Berkeley) 4/2/94"; 46 #else 47 static const char rcsid[] = 48 "$Id: ls.c,v 1.16 1997/08/07 22:28:23 steve Exp $"; 49 #endif 50 #endif /* not lint */ 51 52 #include <sys/types.h> 53 #include <sys/stat.h> 54 #include <sys/ioctl.h> 55 56 #include <dirent.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fts.h> 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <unistd.h> 64 #include <locale.h> 65 66 #include "ls.h" 67 #include "extern.h" 68 69 static void display __P((FTSENT *, FTSENT *)); 70 static int mastercmp __P((const FTSENT **, const FTSENT **)); 71 static void traverse __P((int, char **, int)); 72 73 static void (*printfcn) __P((DISPLAY *)); 74 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 75 76 long blocksize; /* block size units */ 77 int termwidth = 80; /* default terminal width */ 78 79 /* flags */ 80 int f_accesstime; /* use time of last access */ 81 int f_column; /* columnated format */ 82 int f_flags; /* show flags associated with a file */ 83 int f_inode; /* print inode */ 84 int f_kblocks; /* print size in kilobytes */ 85 int f_listdir; /* list actual directory, not contents */ 86 int f_listdot; /* list files beginning with . */ 87 int f_longform; /* long listing format */ 88 int f_newline; /* if precede with newline */ 89 int f_nonprint; /* show unprintables as ? */ 90 int f_nosort; /* don't sort output */ 91 int f_recursive; /* ls subdirectories also */ 92 int f_reversesort; /* reverse whatever sort is used */ 93 int f_sectime; /* print the real time for all files */ 94 int f_singlecol; /* use single column output */ 95 int f_size; /* list size in short listing */ 96 int f_statustime; /* use time of last mode change */ 97 int f_dirname; /* if precede with directory name */ 98 int f_timesort; /* sort by time vice name */ 99 int f_type; /* add type character for non-regular files */ 100 int f_whiteout; /* show whiteout entries */ 101 102 int rval; 103 104 int 105 main(argc, argv) 106 int argc; 107 char *argv[]; 108 { 109 static char dot[] = ".", *dotav[] = { dot, NULL }; 110 struct winsize win; 111 int ch, fts_options, notused; 112 char *p; 113 114 (void) setlocale(LC_ALL, ""); 115 116 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 117 if (isatty(STDOUT_FILENO)) { 118 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || 119 !win.ws_col) { 120 if ((p = getenv("COLUMNS")) != NULL) 121 termwidth = atoi(p); 122 } 123 else 124 termwidth = win.ws_col; 125 f_column = f_nonprint = 1; 126 } else { 127 f_singlecol = 1; 128 /* retrieve environment variable, in case of explicit -C */ 129 if ((p = getenv("COLUMNS"))) 130 termwidth = atoi(p); 131 } 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, "1ACFLRTWacdfgikloqrstu")) != -1) { 139 switch (ch) { 140 /* 141 * The -1, -C and -l options all override each other so shell 142 * aliasing works right. 143 */ 144 case '1': 145 f_singlecol = 1; 146 f_column = f_longform = 0; 147 break; 148 case 'C': 149 f_column = 1; 150 f_longform = f_singlecol = 0; 151 break; 152 case 'l': 153 f_longform = 1; 154 f_column = f_singlecol = 0; 155 break; 156 /* The -c and -u options override each other. */ 157 case 'c': 158 f_statustime = 1; 159 f_accesstime = 0; 160 break; 161 case 'u': 162 f_accesstime = 1; 163 f_statustime = 0; 164 break; 165 case 'F': 166 f_type = 1; 167 break; 168 case 'L': 169 fts_options &= ~FTS_PHYSICAL; 170 fts_options |= FTS_LOGICAL; 171 break; 172 case 'R': 173 f_recursive = 1; 174 break; 175 case 'a': 176 fts_options |= FTS_SEEDOT; 177 /* FALLTHROUGH */ 178 case 'A': 179 f_listdot = 1; 180 break; 181 /* The -d option turns off the -R option. */ 182 case 'd': 183 f_listdir = 1; 184 f_recursive = 0; 185 break; 186 case 'f': 187 f_nosort = 1; 188 break; 189 case 'g': /* Compatibility with 4.3BSD. */ 190 break; 191 case 'i': 192 f_inode = 1; 193 break; 194 case 'k': 195 f_kblocks = 1; 196 break; 197 case 'o': 198 f_flags = 1; 199 break; 200 case 'q': 201 f_nonprint = 1; 202 break; 203 case 'r': 204 f_reversesort = 1; 205 break; 206 case 's': 207 f_size = 1; 208 break; 209 case 'T': 210 f_sectime = 1; 211 break; 212 case 't': 213 f_timesort = 1; 214 break; 215 case 'W': 216 f_whiteout = 1; 217 break; 218 default: 219 case '?': 220 usage(); 221 } 222 } 223 argc -= optind; 224 argv += optind; 225 226 /* 227 * If not -F, -i, -l, -s or -t options, don't require stat 228 * information. 229 */ 230 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type) 231 fts_options |= FTS_NOSTAT; 232 233 /* 234 * If not -F, -d or -l options, follow any symbolic links listed on 235 * the command line. 236 */ 237 if (!f_longform && !f_listdir && !f_type) 238 fts_options |= FTS_COMFOLLOW; 239 240 /* 241 * If -W, show whiteout entries 242 */ 243 #ifdef FTS_WHITEOUT 244 if (f_whiteout) 245 fts_options |= FTS_WHITEOUT; 246 #endif 247 248 /* If -l or -s, figure out block size. */ 249 if (f_longform || f_size) { 250 if (f_kblocks) 251 blocksize = 2; 252 else { 253 (void)getbsize(¬used, &blocksize); 254 blocksize /= 512; 255 } 256 } 257 258 /* Select a sort function. */ 259 if (f_reversesort) { 260 if (!f_timesort) 261 sortfcn = revnamecmp; 262 else if (f_accesstime) 263 sortfcn = revacccmp; 264 else if (f_statustime) 265 sortfcn = revstatcmp; 266 else /* Use modification time. */ 267 sortfcn = revmodcmp; 268 } else { 269 if (!f_timesort) 270 sortfcn = namecmp; 271 else if (f_accesstime) 272 sortfcn = acccmp; 273 else if (f_statustime) 274 sortfcn = statcmp; 275 else /* Use modification time. */ 276 sortfcn = modcmp; 277 } 278 279 /* Select a print function. */ 280 if (f_singlecol) 281 printfcn = printscol; 282 else if (f_longform) 283 printfcn = printlong; 284 else 285 printfcn = printcol; 286 287 if (argc) 288 traverse(argc, argv, fts_options); 289 else 290 traverse(1, dotav, fts_options); 291 exit(rval); 292 } 293 294 static int output; /* If anything output. */ 295 296 /* 297 * Traverse() walks the logical directory structure specified by the argv list 298 * in the order specified by the mastercmp() comparison function. During the 299 * traversal it passes linked lists of structures to display() which represent 300 * a superset (may be exact set) of the files to be displayed. 301 */ 302 static void 303 traverse(argc, argv, options) 304 int argc, options; 305 char *argv[]; 306 { 307 FTS *ftsp; 308 FTSENT *p, *chp; 309 int ch_options; 310 311 if ((ftsp = 312 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 313 err(1, NULL); 314 315 display(NULL, fts_children(ftsp, 0)); 316 if (f_listdir) 317 return; 318 319 /* 320 * If not recursing down this tree and don't need stat info, just get 321 * the names. 322 */ 323 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 324 325 while ((p = fts_read(ftsp)) != NULL) 326 switch (p->fts_info) { 327 case FTS_DC: 328 warnx("%s: directory causes a cycle", p->fts_name); 329 break; 330 case FTS_DNR: 331 case FTS_ERR: 332 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 333 rval = 1; 334 break; 335 case FTS_D: 336 if (p->fts_level != FTS_ROOTLEVEL && 337 p->fts_name[0] == '.' && !f_listdot) 338 break; 339 340 /* 341 * If already output something, put out a newline as 342 * a separator. If multiple arguments, precede each 343 * directory with its name. 344 */ 345 if (output) 346 (void)printf("\n%s:\n", p->fts_path); 347 else if (argc > 1) { 348 (void)printf("%s:\n", p->fts_path); 349 output = 1; 350 } 351 352 chp = fts_children(ftsp, ch_options); 353 display(p, chp); 354 355 if (!f_recursive && chp != NULL) 356 (void)fts_set(ftsp, p, FTS_SKIP); 357 break; 358 } 359 if (errno) 360 err(1, "fts_read"); 361 } 362 363 /* 364 * Display() takes a linked list of FTSENT structures and passes the list 365 * along with any other necessary information to the print function. P 366 * points to the parent directory of the display list. 367 */ 368 static void 369 display(p, list) 370 FTSENT *p, *list; 371 { 372 struct stat *sp; 373 DISPLAY d; 374 FTSENT *cur; 375 NAMES *np; 376 u_quad_t maxsize; 377 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 378 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 379 int entries, needstats; 380 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */ 381 382 /* 383 * If list is NULL there are two possibilities: that the parent 384 * directory p has no children, or that fts_children() returned an 385 * error. We ignore the error case since it will be replicated 386 * on the next call to fts_read() on the post-order visit to the 387 * directory p, and will be signalled in traverse(). 388 */ 389 if (list == NULL) 390 return; 391 392 needstats = f_inode || f_longform || f_size; 393 flen = 0; 394 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 395 bcfile = 0; 396 maxuser = maxgroup = maxflags = 0; 397 flags = NULL; 398 maxsize = 0; 399 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 400 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 401 warnx("%s: %s", 402 cur->fts_name, strerror(cur->fts_errno)); 403 cur->fts_number = NO_PRINT; 404 rval = 1; 405 continue; 406 } 407 408 /* 409 * P is NULL if list is the argv list, to which different rules 410 * apply. 411 */ 412 if (p == NULL) { 413 /* Directories will be displayed later. */ 414 if (cur->fts_info == FTS_D && !f_listdir) { 415 cur->fts_number = NO_PRINT; 416 continue; 417 } 418 } else { 419 /* Only display dot file if -a/-A set. */ 420 if (cur->fts_name[0] == '.' && !f_listdot) { 421 cur->fts_number = NO_PRINT; 422 continue; 423 } 424 } 425 if (f_nonprint) 426 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 427 if (cur->fts_namelen > maxlen) 428 maxlen = cur->fts_namelen; 429 if (needstats) { 430 sp = cur->fts_statp; 431 if (sp->st_blocks > maxblock) 432 maxblock = sp->st_blocks; 433 if (sp->st_ino > maxinode) 434 maxinode = sp->st_ino; 435 if (sp->st_nlink > maxnlink) 436 maxnlink = sp->st_nlink; 437 if (sp->st_size > maxsize) 438 maxsize = sp->st_size; 439 440 btotal += sp->st_blocks; 441 if (f_longform) { 442 user = user_from_uid(sp->st_uid, 0); 443 if ((ulen = strlen(user)) > maxuser) 444 maxuser = ulen; 445 group = group_from_gid(sp->st_gid, 0); 446 if ((glen = strlen(group)) > maxgroup) 447 maxgroup = glen; 448 if (f_flags) { 449 flags = 450 flags_to_string(sp->st_flags, "-"); 451 if ((flen = strlen(flags)) > maxflags) 452 maxflags = flen; 453 } else 454 flen = 0; 455 456 if ((np = malloc(sizeof(NAMES) + 457 ulen + glen + flen + 3)) == NULL) 458 err(1, NULL); 459 460 np->user = &np->data[0]; 461 (void)strcpy(np->user, user); 462 np->group = &np->data[ulen + 1]; 463 (void)strcpy(np->group, group); 464 465 if (S_ISCHR(sp->st_mode) || 466 S_ISBLK(sp->st_mode)) 467 bcfile = 1; 468 469 if (f_flags) { 470 np->flags = &np->data[ulen + glen + 2]; 471 (void)strcpy(np->flags, flags); 472 } 473 cur->fts_pointer = np; 474 } 475 } 476 ++entries; 477 } 478 479 if (!entries) 480 return; 481 482 d.list = list; 483 d.entries = entries; 484 d.maxlen = maxlen; 485 if (needstats) { 486 d.bcfile = bcfile; 487 d.btotal = btotal; 488 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 489 d.s_block = strlen(buf); 490 d.s_flags = maxflags; 491 d.s_group = maxgroup; 492 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 493 d.s_inode = strlen(buf); 494 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 495 d.s_nlink = strlen(buf); 496 (void)snprintf(buf, sizeof(buf), "%qu", maxsize); 497 d.s_size = strlen(buf); 498 d.s_user = maxuser; 499 } 500 501 printfcn(&d); 502 output = 1; 503 504 if (f_longform) 505 for (cur = list; cur; cur = cur->fts_link) 506 free(cur->fts_pointer); 507 } 508 509 /* 510 * Ordering for mastercmp: 511 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 512 * as larger than directories. Within either group, use the sort function. 513 * All other levels use the sort function. Error entries remain unsorted. 514 */ 515 static int 516 mastercmp(a, b) 517 const FTSENT **a, **b; 518 { 519 int a_info, b_info; 520 521 a_info = (*a)->fts_info; 522 if (a_info == FTS_ERR) 523 return (0); 524 b_info = (*b)->fts_info; 525 if (b_info == FTS_ERR) 526 return (0); 527 528 if (a_info == FTS_NS || b_info == FTS_NS) 529 return (namecmp(*a, *b)); 530 531 if (a_info != b_info && 532 (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) { 533 if (a_info == FTS_D) 534 return (1); 535 if (b_info == FTS_D) 536 return (-1); 537 } 538 return (sortfcn(*a, *b)); 539 } 540