1 /* $NetBSD: ls.c,v 1.38 1999/05/17 12:16:03 lukem 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 47 static char sccsid[] = "@(#)ls.c 8.7 (Berkeley) 8/5/94"; 48 #else 49 __RCSID("$NetBSD: ls.c,v 1.38 1999/05/17 12:16:03 lukem 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 <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <unistd.h> 65 #include <termios.h> 66 #include <pwd.h> 67 #include <grp.h> 68 69 #include "ls.h" 70 #include "extern.h" 71 72 static void display __P((FTSENT *, FTSENT *)); 73 static int mastercmp __P((const FTSENT **, const FTSENT **)); 74 static void traverse __P((int, char **, int)); 75 76 static void (*printfcn) __P((DISPLAY *)); 77 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 78 79 #define BY_NAME 0 80 #define BY_SIZE 1 81 #define BY_TIME 2 82 83 long blocksize; /* block size units */ 84 int termwidth = 80; /* default terminal width */ 85 int sortkey = BY_NAME; 86 int rval = EXIT_SUCCESS; /* exit value - set if error encountered */ 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_nonprint; /* show unprintables as ? */ 98 int f_nosort; /* don't sort output */ 99 int f_numericonly; /* don't convert uid/gid to name */ 100 int f_recursive; /* ls subdirectories also */ 101 int f_reversesort; /* reverse whatever sort is used */ 102 int f_sectime; /* print the real time for all files */ 103 int f_singlecol; /* use single column output */ 104 int f_size; /* list size in short listing */ 105 int f_statustime; /* use time of last mode change */ 106 int f_stream; /* stream format */ 107 int f_type; /* add type character for non-regular files */ 108 int f_typedir; /* add type character for directories */ 109 int f_whiteout; /* show whiteout entries */ 110 111 int 112 ls_main(argc, argv) 113 int argc; 114 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 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 123 if (isatty(STDOUT_FILENO)) { 124 if ((p = getenv("COLUMNS")) != NULL) 125 termwidth = atoi(p); 126 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == 0 && 127 win.ws_col > 0) 128 termwidth = win.ws_col; 129 f_column = f_nonprint = 1; 130 } else 131 f_singlecol = 1; 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, "1ACFLRSTWacdfgiklmnopqrstux")) != -1) { 139 switch (ch) { 140 /* 141 * The -1, -C, -l, -m and -x options all override each other so 142 * shell aliasing works correctly. 143 */ 144 case '1': 145 f_singlecol = 1; 146 f_column = f_columnacross = f_longform = f_stream = 0; 147 break; 148 case 'C': 149 f_column = 1; 150 f_columnacross = f_longform = f_singlecol = f_stream = 151 0; 152 break; 153 case 'l': 154 f_longform = 1; 155 f_column = f_columnacross = f_singlecol = f_stream = 0; 156 break; 157 case 'm': 158 f_stream = 1; 159 f_column = f_columnacross = f_longform = f_singlecol = 160 0; 161 break; 162 case 'x': 163 f_columnacross = 1; 164 f_column = f_longform = f_singlecol = f_stream = 0; 165 break; 166 /* The -c and -u options override each other. */ 167 case 'c': 168 f_statustime = 1; 169 f_accesstime = 0; 170 break; 171 case 'u': 172 f_accesstime = 1; 173 f_statustime = 0; 174 break; 175 case 'F': 176 f_type = 1; 177 break; 178 case 'L': 179 fts_options &= ~FTS_PHYSICAL; 180 fts_options |= FTS_LOGICAL; 181 break; 182 case 'R': 183 f_recursive = 1; 184 break; 185 case 'a': 186 fts_options |= FTS_SEEDOT; 187 /* FALLTHROUGH */ 188 case 'A': 189 f_listdot = 1; 190 break; 191 /* The -d option turns off the -R option. */ 192 case 'd': 193 f_listdir = 1; 194 f_recursive = 0; 195 break; 196 case 'f': 197 f_nosort = 1; 198 break; 199 case 'g': /* Compatibility with 4.3BSD. */ 200 break; 201 case 'i': 202 f_inode = 1; 203 break; 204 case 'k': 205 blocksize = 1024; 206 kflag = 1; 207 break; 208 case 'n': 209 f_numericonly = 1; 210 break; 211 case 'o': 212 f_flags = 1; 213 break; 214 case 'p': 215 f_typedir = 1; 216 break; 217 case 'q': 218 f_nonprint = 1; 219 break; 220 case 'r': 221 f_reversesort = 1; 222 break; 223 case 'S': 224 sortkey = BY_SIZE; 225 break; 226 case 's': 227 f_size = 1; 228 break; 229 case 'T': 230 f_sectime = 1; 231 break; 232 case 't': 233 sortkey = BY_TIME; 234 break; 235 case 'W': 236 f_whiteout = 1; 237 break; 238 default: 239 case '?': 240 usage(); 241 } 242 } 243 argc -= optind; 244 argv += optind; 245 246 /* 247 * If not -F, -i, -l, -p, -S, -s or -t options, don't require stat 248 * information. 249 */ 250 if (!f_inode && !f_longform && !f_size && !f_type && !f_typedir && 251 sortkey == BY_NAME) 252 fts_options |= FTS_NOSTAT; 253 254 /* 255 * If not -F, -d or -l options, follow any symbolic links listed on 256 * the command line. 257 */ 258 if (!f_longform && !f_listdir && !f_type) 259 fts_options |= FTS_COMFOLLOW; 260 261 /* 262 * If -W, show whiteout entries 263 */ 264 #ifdef FTS_WHITEOUT 265 if (f_whiteout) 266 fts_options |= FTS_WHITEOUT; 267 #endif 268 269 /* If -l or -s, figure out block size. */ 270 if (f_longform || f_size) { 271 if (!kflag) 272 (void)getbsize(¬used, &blocksize); 273 blocksize /= 512; 274 } 275 276 /* Select a sort function. */ 277 if (f_reversesort) { 278 switch (sortkey) { 279 case BY_NAME: 280 sortfcn = revnamecmp; 281 break; 282 case BY_SIZE: 283 sortfcn = revsizecmp; 284 break; 285 case BY_TIME: 286 if (f_accesstime) 287 sortfcn = revacccmp; 288 else if (f_statustime) 289 sortfcn = revstatcmp; 290 else /* Use modification time. */ 291 sortfcn = revmodcmp; 292 break; 293 } 294 } else { 295 switch (sortkey) { 296 case BY_NAME: 297 sortfcn = namecmp; 298 break; 299 case BY_SIZE: 300 sortfcn = sizecmp; 301 break; 302 case BY_TIME: 303 if (f_accesstime) 304 sortfcn = acccmp; 305 else if (f_statustime) 306 sortfcn = statcmp; 307 else /* Use modification time. */ 308 sortfcn = modcmp; 309 break; 310 } 311 } 312 313 /* Select a print function. */ 314 if (f_singlecol) 315 printfcn = printscol; 316 else if (f_columnacross) 317 printfcn = printacol; 318 else if (f_longform) 319 printfcn = printlong; 320 else if (f_stream) 321 printfcn = printstream; 322 else 323 printfcn = printcol; 324 325 if (argc) 326 traverse(argc, argv, fts_options); 327 else 328 traverse(1, dotav, fts_options); 329 exit(rval); 330 /* NOTREACHED */ 331 } 332 333 static int output; /* If anything output. */ 334 335 /* 336 * Traverse() walks the logical directory structure specified by the argv list 337 * in the order specified by the mastercmp() comparison function. During the 338 * traversal it passes linked lists of structures to display() which represent 339 * a superset (may be exact set) of the files to be displayed. 340 */ 341 static void 342 traverse(argc, argv, options) 343 int argc, options; 344 char *argv[]; 345 { 346 FTS *ftsp; 347 FTSENT *p, *chp; 348 int ch_options; 349 350 if ((ftsp = 351 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 352 err(EXIT_FAILURE, "%s", ""); 353 354 display(NULL, fts_children(ftsp, 0)); 355 if (f_listdir) 356 return; 357 358 /* 359 * If not recursing down this tree and don't need stat info, just get 360 * the names. 361 */ 362 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 363 364 while ((p = fts_read(ftsp)) != NULL) 365 switch (p->fts_info) { 366 case FTS_DC: 367 warnx("%s: directory causes a cycle", p->fts_name); 368 break; 369 case FTS_DNR: 370 case FTS_ERR: 371 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 372 rval = EXIT_FAILURE; 373 break; 374 case FTS_D: 375 if (p->fts_level != FTS_ROOTLEVEL && 376 p->fts_name[0] == '.' && !f_listdot) 377 break; 378 379 /* 380 * If already output something, put out a newline as 381 * a separator. If multiple arguments, precede each 382 * directory with its name. 383 */ 384 if (output) 385 (void)printf("\n%s:\n", p->fts_path); 386 else if (argc > 1) { 387 (void)printf("%s:\n", p->fts_path); 388 output = 1; 389 } 390 391 chp = fts_children(ftsp, ch_options); 392 display(p, chp); 393 394 if (!f_recursive && chp != NULL) 395 (void)fts_set(ftsp, p, FTS_SKIP); 396 break; 397 } 398 if (errno) 399 err(EXIT_FAILURE, "fts_read"); 400 } 401 402 /* 403 * Display() takes a linked list of FTSENT structures and passes the list 404 * along with any other necessary information to the print function. P 405 * points to the parent directory of the display list. 406 */ 407 static void 408 display(p, list) 409 FTSENT *p, *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 ubuf[21]="", gbuf[21]="", 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 (f_nonprint) 473 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 474 if (cur->fts_namelen > maxlen) 475 maxlen = cur->fts_namelen; 476 if (needstats) { 477 sp = cur->fts_statp; 478 if (sp->st_blocks > maxblock) 479 maxblock = sp->st_blocks; 480 if (sp->st_ino > maxinode) 481 maxinode = sp->st_ino; 482 if (sp->st_nlink > maxnlink) 483 maxnlink = sp->st_nlink; 484 if (sp->st_size > maxsize) 485 maxsize = sp->st_size; 486 if (S_ISCHR(sp->st_mode) || S_ISBLK(sp->st_mode)) { 487 bcfile = 1; 488 if (major(sp->st_rdev) > maxmajor) 489 maxmajor = major(sp->st_rdev); 490 if (minor(sp->st_rdev) > maxminor) 491 maxminor = minor(sp->st_rdev); 492 } 493 494 btotal += sp->st_blocks; 495 if (f_longform) { 496 if (f_numericonly) { 497 (void)snprintf(nuser, sizeof(nuser), 498 "%u", sp->st_uid); 499 (void)snprintf(ngroup, sizeof(ngroup), 500 "%u", sp->st_gid); 501 user = nuser; 502 group = ngroup; 503 } else { 504 if ((user = user_from_uid(sp->st_uid, 0)) == NULL) { 505 (void)snprintf(ubuf, sizeof(ubuf), "%d", (int)sp->st_uid); 506 user = ubuf; 507 } 508 if ((group = group_from_gid(sp->st_gid, 0)) == NULL) { 509 (void)snprintf(gbuf, sizeof(gbuf), "%d", (int)sp->st_gid); 510 user = gbuf; 511 } 512 } 513 if ((ulen = strlen(user)) > maxuser) 514 maxuser = ulen; 515 if ((glen = strlen(group)) > maxgroup) 516 maxgroup = glen; 517 if (f_flags) { 518 flags = 519 flags_to_string(sp->st_flags, "-"); 520 if ((flen = strlen(flags)) > maxflags) 521 maxflags = flen; 522 } else 523 flen = 0; 524 525 if ((np = malloc(sizeof(NAMES) + 526 ulen + glen + flen + 3)) == NULL) 527 err(EXIT_FAILURE, "%s", ""); 528 529 np->user = &np->data[0]; 530 (void)strcpy(np->user, user); 531 np->group = &np->data[ulen + 1]; 532 (void)strcpy(np->group, group); 533 534 if (f_flags) { 535 np->flags = &np->data[ulen + glen + 2]; 536 (void)strcpy(np->flags, flags); 537 } 538 cur->fts_pointer = np; 539 } 540 } 541 ++entries; 542 } 543 544 if (!entries) 545 return; 546 547 d.list = list; 548 d.entries = entries; 549 d.maxlen = maxlen; 550 if (needstats) { 551 d.btotal = btotal; 552 (void)snprintf(buf, sizeof(buf), "%llu", (long long)maxblock); 553 d.s_block = strlen(buf); 554 d.s_flags = maxflags; 555 d.s_group = maxgroup; 556 (void)snprintf(buf, sizeof(buf), "%u", maxinode); 557 d.s_inode = strlen(buf); 558 (void)snprintf(buf, sizeof(buf), "%u", maxnlink); 559 d.s_nlink = strlen(buf); 560 (void)snprintf(buf, sizeof(buf), "%llu", (long long)maxsize); 561 d.s_size = strlen(buf); 562 d.s_user = maxuser; 563 if (bcfile) { 564 (void)snprintf(buf, sizeof(buf), "%u", maxmajor); 565 d.s_major = strlen(buf); 566 (void)snprintf(buf, sizeof(buf), "%u", maxminor); 567 d.s_minor = strlen(buf); 568 if (d.s_major + d.s_minor + 2 > d.s_size) 569 d.s_size = d.s_major + d.s_minor + 2; 570 else if (d.s_size - d.s_minor - 2 > d.s_major) 571 d.s_major = d.s_size - d.s_minor - 2; 572 } else { 573 d.s_major = 0; 574 d.s_minor = 0; 575 } 576 } 577 578 printfcn(&d); 579 output = 1; 580 581 if (f_longform) 582 for (cur = list; cur; cur = cur->fts_link) 583 free(cur->fts_pointer); 584 } 585 586 /* 587 * Ordering for mastercmp: 588 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 589 * as larger than directories. Within either group, use the sort function. 590 * All other levels use the sort function. Error entries remain unsorted. 591 */ 592 static int 593 mastercmp(a, b) 594 const FTSENT **a, **b; 595 { 596 int a_info, b_info; 597 598 a_info = (*a)->fts_info; 599 if (a_info == FTS_ERR) 600 return (0); 601 b_info = (*b)->fts_info; 602 if (b_info == FTS_ERR) 603 return (0); 604 605 if (a_info == FTS_NS || b_info == FTS_NS) { 606 if (b_info != FTS_NS) 607 return (1); 608 else if (a_info != FTS_NS) 609 return (-1); 610 else 611 return (namecmp(*a, *b)); 612 } 613 614 if (a_info != b_info && !f_listdir && 615 (*a)->fts_level == FTS_ROOTLEVEL) { 616 if (a_info == FTS_D) 617 return (1); 618 else if (b_info == FTS_D) 619 return (-1); 620 } 621 return (sortfcn(*a, *b)); 622 } 623