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 * $Id: ls.c,v 1.3 1994/09/24 02:55:54 davidg Exp $ 37 */ 38 39 #ifndef lint 40 static char copyright[] = 41 "@(#) 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 static char sccsid[] = "@(#)ls.c 8.5 (Berkeley) 4/2/94"; 47 #endif /* not lint */ 48 49 #include <sys/types.h> 50 #include <sys/stat.h> 51 #include <sys/ioctl.h> 52 53 #include <dirent.h> 54 #include <err.h> 55 #include <errno.h> 56 #include <fts.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <unistd.h> 61 62 #include "ls.h" 63 #include "extern.h" 64 65 static void display __P((FTSENT *, FTSENT *)); 66 static int mastercmp __P((const FTSENT **, const FTSENT **)); 67 static void traverse __P((int, char **, int)); 68 69 static void (*printfcn) __P((DISPLAY *)); 70 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 71 72 long blocksize; /* block size units */ 73 int termwidth = 80; /* default terminal width */ 74 75 /* flags */ 76 int f_accesstime; /* use time of last access */ 77 int f_column; /* columnated format */ 78 int f_flags; /* show flags associated with a file */ 79 int f_inode; /* print inode */ 80 int f_kblocks; /* print size in kilobytes */ 81 int f_listdir; /* list actual directory, not contents */ 82 int f_listdot; /* list files beginning with . */ 83 int f_longform; /* long listing format */ 84 int f_newline; /* if precede with newline */ 85 int f_nonprint; /* show unprintables as ? */ 86 int f_nosort; /* don't sort output */ 87 int f_recursive; /* ls subdirectories also */ 88 int f_reversesort; /* reverse whatever sort is used */ 89 int f_sectime; /* print the real time for all files */ 90 int f_singlecol; /* use single column output */ 91 int f_size; /* list size in short listing */ 92 int f_statustime; /* use time of last mode change */ 93 int f_dirname; /* if precede with directory name */ 94 int f_timesort; /* sort by time vice name */ 95 int f_type; /* add type character for non-regular files */ 96 97 int 98 main(argc, argv) 99 int argc; 100 char *argv[]; 101 { 102 static char dot[] = ".", *dotav[] = { dot, NULL }; 103 struct winsize win; 104 int ch, fts_options, notused; 105 char *p; 106 107 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 108 if (isatty(STDOUT_FILENO)) { 109 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || 110 !win.ws_col) { 111 if ((p = getenv("COLUMNS")) != NULL) 112 termwidth = atoi(p); 113 } 114 else 115 termwidth = win.ws_col; 116 f_column = f_nonprint = 1; 117 } else { 118 f_singlecol = 1; 119 /* retrieve environment variable, in case of explicit -C */ 120 if (p = getenv("COLUMNS")) 121 termwidth = atoi(p); 122 } 123 124 /* Root is -A automatically. */ 125 if (!getuid()) 126 f_listdot = 1; 127 128 fts_options = FTS_PHYSICAL; 129 while ((ch = getopt(argc, argv, "1ACFLRTacdfgikloqrstu")) != EOF) { 130 switch (ch) { 131 /* 132 * The -1, -C and -l options all override each other so shell 133 * aliasing works right. 134 */ 135 case '1': 136 f_singlecol = 1; 137 f_column = f_longform = 0; 138 break; 139 case 'C': 140 f_column = 1; 141 f_longform = f_singlecol = 0; 142 break; 143 case 'l': 144 f_longform = 1; 145 f_column = f_singlecol = 0; 146 break; 147 /* The -c and -u options override each other. */ 148 case 'c': 149 f_statustime = 1; 150 f_accesstime = 0; 151 break; 152 case 'u': 153 f_accesstime = 1; 154 f_statustime = 0; 155 break; 156 case 'F': 157 f_type = 1; 158 break; 159 case 'L': 160 fts_options &= ~FTS_PHYSICAL; 161 fts_options |= FTS_LOGICAL; 162 break; 163 case 'R': 164 f_recursive = 1; 165 break; 166 case 'a': 167 fts_options |= FTS_SEEDOT; 168 /* FALLTHROUGH */ 169 case 'A': 170 f_listdot = 1; 171 break; 172 /* The -d option turns off the -R option. */ 173 case 'd': 174 f_listdir = 1; 175 f_recursive = 0; 176 break; 177 case 'f': 178 f_nosort = 1; 179 break; 180 case 'g': /* Compatibility with 4.3BSD. */ 181 break; 182 case 'i': 183 f_inode = 1; 184 break; 185 case 'k': 186 f_kblocks = 1; 187 break; 188 case 'o': 189 f_flags = 1; 190 break; 191 case 'q': 192 f_nonprint = 1; 193 break; 194 case 'r': 195 f_reversesort = 1; 196 break; 197 case 's': 198 f_size = 1; 199 break; 200 case 'T': 201 f_sectime = 1; 202 break; 203 case 't': 204 f_timesort = 1; 205 break; 206 default: 207 case '?': 208 usage(); 209 } 210 } 211 argc -= optind; 212 argv += optind; 213 214 /* 215 * If not -F, -i, -l, -s or -t options, don't require stat 216 * information. 217 */ 218 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type) 219 fts_options |= FTS_NOSTAT; 220 221 /* 222 * If not -F, -d or -l options, follow any symbolic links listed on 223 * the command line. 224 */ 225 if (!f_longform && !f_listdir && !f_type) 226 fts_options |= FTS_COMFOLLOW; 227 228 /* If -l or -s, figure out block size. */ 229 if (f_longform || f_size) { 230 (void)getbsize(¬used, &blocksize); 231 blocksize /= 512; 232 if (f_kblocks) 233 blocksize *= 2; 234 } 235 236 /* Select a sort function. */ 237 if (f_reversesort) { 238 if (!f_timesort) 239 sortfcn = revnamecmp; 240 else if (f_accesstime) 241 sortfcn = revacccmp; 242 else if (f_statustime) 243 sortfcn = revstatcmp; 244 else /* Use modification time. */ 245 sortfcn = revmodcmp; 246 } else { 247 if (!f_timesort) 248 sortfcn = namecmp; 249 else if (f_accesstime) 250 sortfcn = acccmp; 251 else if (f_statustime) 252 sortfcn = statcmp; 253 else /* Use modification time. */ 254 sortfcn = modcmp; 255 } 256 257 /* Select a print function. */ 258 if (f_singlecol) 259 printfcn = printscol; 260 else if (f_longform) 261 printfcn = printlong; 262 else 263 printfcn = printcol; 264 265 if (argc) 266 traverse(argc, argv, fts_options); 267 else 268 traverse(1, dotav, fts_options); 269 exit(0); 270 } 271 272 static int output; /* If anything output. */ 273 274 /* 275 * Traverse() walks the logical directory structure specified by the argv list 276 * in the order specified by the mastercmp() comparison function. During the 277 * traversal it passes linked lists of structures to display() which represent 278 * a superset (may be exact set) of the files to be displayed. 279 */ 280 static void 281 traverse(argc, argv, options) 282 int argc, options; 283 char *argv[]; 284 { 285 FTS *ftsp; 286 FTSENT *p, *chp; 287 int ch_options; 288 289 if ((ftsp = 290 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 291 err(1, NULL); 292 293 display(NULL, fts_children(ftsp, 0)); 294 if (f_listdir) 295 return; 296 297 /* 298 * If not recursing down this tree and don't need stat info, just get 299 * the names. 300 */ 301 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 302 303 while ((p = fts_read(ftsp)) != NULL) 304 switch (p->fts_info) { 305 case FTS_DC: 306 warnx("%s: directory causes a cycle", p->fts_name); 307 break; 308 case FTS_DNR: 309 case FTS_ERR: 310 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 311 break; 312 case FTS_D: 313 if (p->fts_level != FTS_ROOTLEVEL && 314 p->fts_name[0] == '.' && !f_listdot) 315 break; 316 317 /* 318 * If already output something, put out a newline as 319 * a separator. If multiple arguments, precede each 320 * directory with its name. 321 */ 322 if (output) 323 (void)printf("\n%s:\n", p->fts_path); 324 else if (argc > 1) { 325 (void)printf("%s:\n", p->fts_path); 326 output = 1; 327 } 328 329 chp = fts_children(ftsp, ch_options); 330 display(p, chp); 331 332 if (!f_recursive && chp != NULL) 333 (void)fts_set(ftsp, p, FTS_SKIP); 334 break; 335 } 336 if (errno) 337 err(1, "fts_read"); 338 } 339 340 /* 341 * Display() takes a linked list of FTSENT structures and passes the list 342 * along with any other necessary information to the print function. P 343 * points to the parent directory of the display list. 344 */ 345 static void 346 display(p, list) 347 FTSENT *p, *list; 348 { 349 struct stat *sp; 350 DISPLAY d; 351 FTSENT *cur; 352 NAMES *np; 353 u_quad_t maxsize; 354 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 355 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 356 int entries, needstats; 357 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */ 358 359 /* 360 * If list is NULL there are two possibilities: that the parent 361 * directory p has no children, or that fts_children() returned an 362 * error. We ignore the error case since it will be replicated 363 * on the next call to fts_read() on the post-order visit to the 364 * directory p, and will be signalled in traverse(). 365 */ 366 if (list == NULL) 367 return; 368 369 needstats = f_inode || f_longform || f_size; 370 flen = 0; 371 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 372 bcfile = 0; 373 maxuser = maxgroup = maxflags = 0; 374 maxsize = 0; 375 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 376 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 377 warnx("%s: %s", 378 cur->fts_name, strerror(cur->fts_errno)); 379 cur->fts_number = NO_PRINT; 380 continue; 381 } 382 383 /* 384 * P is NULL if list is the argv list, to which different rules 385 * apply. 386 */ 387 if (p == NULL) { 388 /* Directories will be displayed later. */ 389 if (cur->fts_info == FTS_D && !f_listdir) { 390 cur->fts_number = NO_PRINT; 391 continue; 392 } 393 } else { 394 /* Only display dot file if -a/-A set. */ 395 if (cur->fts_name[0] == '.' && !f_listdot) { 396 cur->fts_number = NO_PRINT; 397 continue; 398 } 399 } 400 if (f_nonprint) 401 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 402 if (cur->fts_namelen > maxlen) 403 maxlen = cur->fts_namelen; 404 if (needstats) { 405 sp = cur->fts_statp; 406 if (sp->st_blocks > maxblock) 407 maxblock = sp->st_blocks; 408 if (sp->st_ino > maxinode) 409 maxinode = sp->st_ino; 410 if (sp->st_nlink > maxnlink) 411 maxnlink = sp->st_nlink; 412 if (sp->st_size > maxsize) 413 maxsize = sp->st_size; 414 415 btotal += sp->st_blocks; 416 if (f_longform) { 417 user = user_from_uid(sp->st_uid, 0); 418 if ((ulen = strlen(user)) > maxuser) 419 maxuser = ulen; 420 group = group_from_gid(sp->st_gid, 0); 421 if ((glen = strlen(group)) > maxgroup) 422 maxgroup = glen; 423 if (f_flags) { 424 flags = 425 flags_to_string(sp->st_flags, "-"); 426 if ((flen = strlen(flags)) > maxflags) 427 maxflags = flen; 428 } else 429 flen = 0; 430 431 if ((np = malloc(sizeof(NAMES) + 432 ulen + glen + flen + 3)) == NULL) 433 err(1, NULL); 434 435 np->user = &np->data[0]; 436 (void)strcpy(np->user, user); 437 np->group = &np->data[ulen + 1]; 438 (void)strcpy(np->group, group); 439 440 if (S_ISCHR(sp->st_mode) || 441 S_ISBLK(sp->st_mode)) 442 bcfile = 1; 443 444 if (f_flags) { 445 np->flags = &np->data[ulen + glen + 2]; 446 (void)strcpy(np->flags, flags); 447 } 448 cur->fts_pointer = np; 449 } 450 } 451 ++entries; 452 } 453 454 if (!entries) 455 return; 456 457 d.list = list; 458 d.entries = entries; 459 d.maxlen = maxlen; 460 if (needstats) { 461 d.bcfile = bcfile; 462 d.btotal = btotal; 463 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 464 d.s_block = strlen(buf); 465 d.s_flags = maxflags; 466 d.s_group = maxgroup; 467 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 468 d.s_inode = strlen(buf); 469 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 470 d.s_nlink = strlen(buf); 471 (void)snprintf(buf, sizeof(buf), "%qu", maxsize); 472 d.s_size = strlen(buf); 473 d.s_user = maxuser; 474 } 475 476 printfcn(&d); 477 output = 1; 478 479 if (f_longform) 480 for (cur = list; cur; cur = cur->fts_link) 481 free(cur->fts_pointer); 482 } 483 484 /* 485 * Ordering for mastercmp: 486 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 487 * as larger than directories. Within either group, use the sort function. 488 * All other levels use the sort function. Error entries remain unsorted. 489 */ 490 static int 491 mastercmp(a, b) 492 const FTSENT **a, **b; 493 { 494 int a_info, b_info; 495 496 a_info = (*a)->fts_info; 497 if (a_info == FTS_ERR) 498 return (0); 499 b_info = (*b)->fts_info; 500 if (b_info == FTS_ERR) 501 return (0); 502 503 if (a_info == FTS_NS || b_info == FTS_NS) 504 return (namecmp(*a, *b)); 505 506 if (a_info == b_info) 507 return (sortfcn(*a, *b)); 508 509 if ((*a)->fts_level == FTS_ROOTLEVEL) 510 if (a_info == FTS_D) 511 return (1); 512 else if (b_info == FTS_D) 513 return (-1); 514 else 515 return (sortfcn(*a, *b)); 516 else 517 return (sortfcn(*a, *b)); 518 } 519