1 /* $OpenBSD: ls.c,v 1.15 2001/07/09 00:37:53 deraadt 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. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the University of 22 * California, Berkeley and its contributors. 23 * 4. Neither the name of the University nor the names of its contributors 24 * may be used to endorse or promote products derived from this software 25 * without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 * SUCH DAMAGE. 38 */ 39 40 #ifndef lint 41 static char copyright[] = 42 "@(#) Copyright (c) 1989, 1993, 1994\n\ 43 The Regents of the University of California. All rights reserved.\n"; 44 #endif /* not lint */ 45 46 #ifndef lint 47 #if 0 48 static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 49 #else 50 static char rcsid[] = "$OpenBSD: ls.c,v 1.15 2001/07/09 00:37:53 deraadt Exp $"; 51 #endif 52 #endif /* not lint */ 53 54 #include <sys/types.h> 55 #include <sys/stat.h> 56 #include <sys/ioctl.h> 57 58 #include <dirent.h> 59 #include <err.h> 60 #include <errno.h> 61 #include <fts.h> 62 #include <stdio.h> 63 #include <stdlib.h> 64 #include <string.h> 65 #include <unistd.h> 66 67 #include "ls.h" 68 #include "extern.h" 69 70 char *group_from_gid __P((u_int, int)); 71 char *user_from_uid __P((u_int, int)); 72 73 static void display __P((FTSENT *, FTSENT *)); 74 static int mastercmp __P((const FTSENT **, const FTSENT **)); 75 static void traverse __P((int, char **, int)); 76 77 static void (*printfcn) __P((DISPLAY *)); 78 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 79 80 #define BY_NAME 0 81 #define BY_SIZE 1 82 #define BY_TIME 2 83 84 long blocksize; /* block size units */ 85 int termwidth = 80; /* default terminal width */ 86 int sortkey = BY_NAME; 87 88 /* flags */ 89 int f_accesstime; /* use time of last access */ 90 int f_column; /* columnated format */ 91 int f_columnacross; /* columnated format, sorted across */ 92 int f_flags; /* show flags associated with a file */ 93 int f_inode; /* print inode */ 94 int f_listdir; /* list actual directory, not contents */ 95 int f_listdot; /* list files beginning with . */ 96 int f_longform; /* long listing format */ 97 int f_newline; /* if precede with newline */ 98 int f_nonprint; /* show unprintables as ? */ 99 int f_nosort; /* don't sort output */ 100 int f_numericonly; /* don't expand uid to symbolic name */ 101 int f_recursive; /* ls subdirectories also */ 102 int f_reversesort; /* reverse whatever sort is used */ 103 int f_sectime; /* print the real time for all files */ 104 int f_singlecol; /* use single column output */ 105 int f_size; /* list size in short listing */ 106 int f_statustime; /* use time of last mode change */ 107 int f_stream; /* stream format */ 108 int f_dirname; /* if precede with directory name */ 109 int f_type; /* add type character for non-regular files */ 110 int f_typedir; /* add type character for directories */ 111 int f_whiteout; /* show whiteout entries */ 112 113 int rval; 114 115 int 116 ls_main(argc, argv) 117 int argc; 118 char *argv[]; 119 { 120 static char dot[] = ".", *dotav[] = { dot, NULL }; 121 struct winsize win; 122 int ch, fts_options, notused; 123 int kflag = 0; 124 char *p; 125 126 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 127 if (isatty(STDOUT_FILENO)) { 128 if ((p = getenv("COLUMNS")) != NULL) 129 termwidth = atoi(p); 130 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 131 win.ws_col > 0) 132 termwidth = win.ws_col; 133 f_column = f_nonprint = 1; 134 } else 135 f_singlecol = 1; 136 137 /* Root is -A automatically. */ 138 if (!getuid()) 139 f_listdot = 1; 140 141 fts_options = FTS_PHYSICAL; 142 while ((ch = getopt(argc, argv, "1ACFLRSTWacdfgiklmnopqrstux")) != -1) { 143 switch (ch) { 144 /* 145 * The -1, -C and -l, -m and -x options all override each 146 * other so shell aliasing works right. 147 */ 148 case '1': 149 f_singlecol = 1; 150 f_column = f_columnacross = f_longform = f_stream = 0; 151 break; 152 case 'C': 153 f_column = 1; 154 f_longform = f_columnacross = f_singlecol = f_stream = 0; 155 break; 156 case 'l': 157 f_longform = 1; 158 f_numericonly = 0; 159 f_column = f_columnacross = f_singlecol = f_stream = 0; 160 break; 161 case 'm': 162 f_stream = 1; 163 f_column = f_columnacross = f_singlecol = 0; 164 f_singlecol = 0; 165 break; 166 case 'x': 167 f_columnacross = 1; 168 f_column = f_longform = f_singlecol = f_stream = 0; 169 break; 170 case 'n': 171 f_longform = 1; 172 f_numericonly = 1; 173 f_column = f_singlecol = 0; 174 break; 175 /* The -c and -u options override each other. */ 176 case 'c': 177 f_statustime = 1; 178 f_accesstime = 0; 179 break; 180 case 'u': 181 f_accesstime = 1; 182 f_statustime = 0; 183 break; 184 case 'F': 185 f_type = 1; 186 break; 187 case 'L': 188 fts_options &= ~FTS_PHYSICAL; 189 fts_options |= FTS_LOGICAL; 190 break; 191 case 'R': 192 f_recursive = 1; 193 break; 194 case 'a': 195 fts_options |= FTS_SEEDOT; 196 /* FALLTHROUGH */ 197 case 'A': 198 f_listdot = 1; 199 break; 200 /* The -d option turns off the -R option. */ 201 case 'd': 202 f_listdir = 1; 203 f_recursive = 0; 204 break; 205 case 'f': 206 f_nosort = 1; 207 break; 208 case 'g': /* Compatibility with 4.3BSD. */ 209 break; 210 case 'i': 211 f_inode = 1; 212 break; 213 case 'k': 214 blocksize = 1024; 215 kflag = 1; 216 break; 217 case 'o': 218 f_flags = 1; 219 break; 220 case 'p': 221 f_typedir = 1; 222 break; 223 case 'q': 224 f_nonprint = 1; 225 break; 226 case 'r': 227 f_reversesort = 1; 228 break; 229 case 'S': 230 sortkey = BY_SIZE; 231 break; 232 case 's': 233 f_size = 1; 234 break; 235 case 'T': 236 f_sectime = 1; 237 break; 238 case 't': 239 sortkey = BY_TIME; 240 break; 241 case 'W': 242 f_whiteout = 1; 243 break; 244 default: 245 usage(); 246 } 247 } 248 argc -= optind; 249 argv += optind; 250 251 /* 252 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 253 * information. 254 */ 255 if (!f_longform && !f_inode && !f_size && !f_type && !f_typedir && 256 sortkey == BY_NAME) 257 fts_options |= FTS_NOSTAT; 258 259 /* 260 * If not -F, -d or -l options, follow any symbolic links listed on 261 * the command line. 262 */ 263 if (!f_longform && !f_listdir && !f_type) 264 fts_options |= FTS_COMFOLLOW; 265 266 /* 267 * If -W, show whiteout entries 268 */ 269 #ifdef FTS_WHITEOUT 270 if (f_whiteout) 271 fts_options |= FTS_WHITEOUT; 272 #endif 273 274 /* If -l or -s, figure out block size. */ 275 if (f_longform || f_size) { 276 if (!kflag) 277 (void)getbsize(¬used, &blocksize); 278 blocksize /= 512; 279 } 280 281 /* Select a sort function. */ 282 if (f_reversesort) { 283 switch (sortkey) { 284 case BY_NAME: 285 sortfcn = revnamecmp; 286 break; 287 case BY_SIZE: 288 sortfcn = revsizecmp; 289 break; 290 case BY_TIME: 291 if (f_accesstime) 292 sortfcn = revacccmp; 293 else if (f_statustime) 294 sortfcn = revstatcmp; 295 else /* Use modification time. */ 296 sortfcn = revmodcmp; 297 break; 298 } 299 } else { 300 switch (sortkey) { 301 case BY_NAME: 302 sortfcn = namecmp; 303 break; 304 case BY_SIZE: 305 sortfcn = sizecmp; 306 break; 307 case BY_TIME: 308 if (f_accesstime) 309 sortfcn = acccmp; 310 else if (f_statustime) 311 sortfcn = statcmp; 312 else /* Use modification time. */ 313 sortfcn = modcmp; 314 break; 315 } 316 } 317 318 /* Select a print function. */ 319 if (f_singlecol) 320 printfcn = printscol; 321 else if (f_columnacross) 322 printfcn = printacol; 323 else if (f_longform) 324 printfcn = printlong; 325 else if (f_stream) 326 printfcn = printstream; 327 else 328 printfcn = printcol; 329 330 if (argc) 331 traverse(argc, argv, fts_options); 332 else 333 traverse(1, dotav, fts_options); 334 exit(rval); 335 } 336 337 static int output; /* If anything output. */ 338 339 /* 340 * Traverse() walks the logical directory structure specified by the argv list 341 * in the order specified by the mastercmp() comparison function. During the 342 * traversal it passes linked lists of structures to display() which represent 343 * a superset (may be exact set) of the files to be displayed. 344 */ 345 static void 346 traverse(argc, argv, options) 347 int argc, options; 348 char *argv[]; 349 { 350 FTS *ftsp; 351 FTSENT *p, *chp; 352 int ch_options; 353 354 if ((ftsp = 355 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 356 err(1, NULL); 357 358 display(NULL, fts_children(ftsp, 0)); 359 if (f_listdir) 360 return; 361 362 /* 363 * If not recursing down this tree and don't need stat info, just get 364 * the names. 365 */ 366 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 367 368 while ((p = fts_read(ftsp)) != NULL) 369 switch (p->fts_info) { 370 case FTS_D: 371 if (p->fts_name[0] == '.' && 372 p->fts_level != FTS_ROOTLEVEL && !f_listdot) 373 break; 374 375 /* 376 * If already output something, put out a newline as 377 * a separator. If multiple arguments, precede each 378 * directory with its name. 379 */ 380 if (output) 381 (void)printf("\n%s:\n", p->fts_path); 382 else if (argc > 1) { 383 (void)printf("%s:\n", p->fts_path); 384 output = 1; 385 } 386 387 chp = fts_children(ftsp, ch_options); 388 display(p, chp); 389 390 if (!f_recursive && chp != NULL) 391 (void)fts_set(ftsp, p, FTS_SKIP); 392 break; 393 case FTS_DC: 394 warnx("%s: directory causes a cycle", p->fts_name); 395 break; 396 case FTS_DNR: 397 case FTS_ERR: 398 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 399 rval = 1; 400 break; 401 } 402 if (errno) 403 err(1, "fts_read"); 404 } 405 406 /* 407 * Display() takes a linked list of FTSENT structures and passes the list 408 * along with any other necessary information to the print function. P 409 * points to the parent directory of the display list. 410 */ 411 static void 412 display(p, list) 413 FTSENT *p, *list; 414 { 415 struct stat *sp; 416 DISPLAY d; 417 FTSENT *cur; 418 NAMES *np; 419 u_quad_t maxsize; 420 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 421 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 422 int entries, needstats; 423 char *user, *group, buf[20]; /* 32 bits == 10 digits */ 424 char nuser[12], ngroup[12]; 425 char *flags = NULL; 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 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 440 bcfile = 0; 441 maxuser = maxgroup = maxflags = 0; 442 maxsize = 0; 443 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 444 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 445 warnx("%s: %s", 446 cur->fts_name, strerror(cur->fts_errno)); 447 cur->fts_number = NO_PRINT; 448 rval = 1; 449 continue; 450 } 451 452 /* 453 * P is NULL if list is the argv list, to which different rules 454 * apply. 455 */ 456 if (p == NULL) { 457 /* Directories will be displayed later. */ 458 if (cur->fts_info == FTS_D && !f_listdir) { 459 cur->fts_number = NO_PRINT; 460 continue; 461 } 462 } else { 463 /* Only display dot file if -a/-A set. */ 464 if (cur->fts_name[0] == '.' && !f_listdot) { 465 cur->fts_number = NO_PRINT; 466 continue; 467 } 468 } 469 if (cur->fts_namelen > maxlen) 470 maxlen = cur->fts_namelen; 471 if (needstats) { 472 sp = cur->fts_statp; 473 if (sp->st_blocks > maxblock) 474 maxblock = sp->st_blocks; 475 if (sp->st_ino > maxinode) 476 maxinode = sp->st_ino; 477 if (sp->st_nlink > maxnlink) 478 maxnlink = sp->st_nlink; 479 if (sp->st_size > maxsize) 480 maxsize = sp->st_size; 481 482 btotal += sp->st_blocks; 483 if (f_longform) { 484 if (f_numericonly) { 485 snprintf(nuser, 12, "%u", sp->st_uid); 486 snprintf(ngroup, 12, "%u", sp->st_gid); 487 user = nuser; 488 group = ngroup; 489 } else { 490 user = user_from_uid(sp->st_uid, 0); 491 group = group_from_gid(sp->st_gid, 0); 492 } 493 if ((ulen = strlen(user)) > maxuser) 494 maxuser = ulen; 495 if ((glen = strlen(group)) > maxgroup) 496 maxgroup = glen; 497 if (f_flags) { 498 flags = fflagstostr(sp->st_flags); 499 if (*flags == '\0') 500 flags = "-"; 501 if ((flen = strlen(flags)) > maxflags) 502 maxflags = flen; 503 } else 504 flen = 0; 505 506 if ((np = malloc(sizeof(NAMES) + 507 ulen + glen + flen + 3)) == NULL) 508 err(1, NULL); 509 510 np->user = &np->data[0]; 511 (void)strcpy(np->user, user); 512 np->group = &np->data[ulen + 1]; 513 (void)strcpy(np->group, group); 514 515 if (S_ISCHR(sp->st_mode) || 516 S_ISBLK(sp->st_mode)) 517 bcfile = 1; 518 519 if (f_flags) { 520 np->flags = &np->data[ulen + glen + 2]; 521 (void)strcpy(np->flags, flags); 522 if (*flags != '-') 523 free(flags); 524 } 525 cur->fts_pointer = np; 526 } 527 } 528 ++entries; 529 } 530 531 if (!entries) 532 return; 533 534 d.list = list; 535 d.entries = entries; 536 d.maxlen = maxlen; 537 if (needstats) { 538 d.bcfile = bcfile; 539 d.btotal = btotal; 540 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 541 d.s_block = strlen(buf); 542 d.s_flags = maxflags; 543 d.s_group = maxgroup; 544 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 545 d.s_inode = strlen(buf); 546 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 547 d.s_nlink = strlen(buf); 548 (void)snprintf(buf, sizeof(buf), "%qu", maxsize); 549 d.s_size = strlen(buf); 550 d.s_user = maxuser; 551 } 552 553 printfcn(&d); 554 output = 1; 555 556 if (f_longform) 557 for (cur = list; cur; cur = cur->fts_link) 558 free(cur->fts_pointer); 559 } 560 561 /* 562 * Ordering for mastercmp: 563 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 564 * as larger than directories. Within either group, use the sort function. 565 * All other levels use the sort function. Error entries remain unsorted. 566 */ 567 static int 568 mastercmp(a, b) 569 const FTSENT **a, **b; 570 { 571 int a_info, b_info; 572 573 a_info = (*a)->fts_info; 574 if (a_info == FTS_ERR) 575 return (0); 576 b_info = (*b)->fts_info; 577 if (b_info == FTS_ERR) 578 return (0); 579 580 if (a_info == FTS_NS || b_info == FTS_NS) { 581 if (b_info != FTS_NS) 582 return (1); 583 else if (a_info != FTS_NS) 584 return (-1); 585 else 586 return (namecmp(*a, *b)); 587 } 588 589 if (a_info != b_info && 590 (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) { 591 if (a_info == FTS_D) 592 return (1); 593 if (b_info == FTS_D) 594 return (-1); 595 } 596 return (sortfcn(*a, *b)); 597 } 598