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 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 static char copyright[] = 13 "@(#) Copyright (c) 1989, 1993, 1994\n\ 14 The Regents of the University of California. All rights reserved.\n"; 15 #endif /* not lint */ 16 17 #ifndef lint 18 static char sccsid[] = "@(#)ls.c 8.6 (Berkeley) 07/28/94"; 19 #endif /* not lint */ 20 21 #include <sys/types.h> 22 #include <sys/stat.h> 23 #include <sys/ioctl.h> 24 25 #include <dirent.h> 26 #include <err.h> 27 #include <errno.h> 28 #include <fts.h> 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <unistd.h> 33 34 #include "ls.h" 35 #include "extern.h" 36 37 static void display __P((FTSENT *, FTSENT *)); 38 static int mastercmp __P((const FTSENT **, const FTSENT **)); 39 static void traverse __P((int, char **, int)); 40 41 static void (*printfcn) __P((DISPLAY *)); 42 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 43 44 long blocksize; /* block size units */ 45 int termwidth = 80; /* default terminal width */ 46 47 /* flags */ 48 int f_accesstime; /* use time of last access */ 49 int f_column; /* columnated format */ 50 int f_flags; /* show flags associated with a file */ 51 int f_inode; /* print inode */ 52 int f_listdir; /* list actual directory, not contents */ 53 int f_listdot; /* list files beginning with . */ 54 int f_longform; /* long listing format */ 55 int f_newline; /* if precede with newline */ 56 int f_nonprint; /* show unprintables as ? */ 57 int f_nosort; /* don't sort output */ 58 int f_recursive; /* ls subdirectories also */ 59 int f_reversesort; /* reverse whatever sort is used */ 60 int f_sectime; /* print the real time for all files */ 61 int f_singlecol; /* use single column output */ 62 int f_size; /* list size in short listing */ 63 int f_statustime; /* use time of last mode change */ 64 int f_dirname; /* if precede with directory name */ 65 int f_timesort; /* sort by time vice name */ 66 int f_type; /* add type character for non-regular files */ 67 int f_whiteout; /* show whiteout entries */ 68 69 int 70 main(argc, argv) 71 int argc; 72 char *argv[]; 73 { 74 static char dot[] = ".", *dotav[] = { dot, NULL }; 75 struct winsize win; 76 int ch, fts_options, notused; 77 char *p; 78 79 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 80 if (isatty(STDOUT_FILENO)) { 81 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || 82 !win.ws_col) { 83 if ((p = getenv("COLUMNS")) != NULL) 84 termwidth = atoi(p); 85 } 86 else 87 termwidth = win.ws_col; 88 f_column = f_nonprint = 1; 89 } else 90 f_singlecol = 1; 91 92 /* Root is -A automatically. */ 93 if (!getuid()) 94 f_listdot = 1; 95 96 fts_options = FTS_PHYSICAL; 97 while ((ch = getopt(argc, argv, "1ACFLRTWacdfgiloqrstu")) != EOF) { 98 switch (ch) { 99 /* 100 * The -1, -C and -l options all override each other so shell 101 * aliasing works right. 102 */ 103 case '1': 104 f_singlecol = 1; 105 f_column = f_longform = 0; 106 break; 107 case 'C': 108 f_column = 1; 109 f_longform = f_singlecol = 0; 110 break; 111 case 'l': 112 f_longform = 1; 113 f_column = f_singlecol = 0; 114 break; 115 /* The -c and -u options override each other. */ 116 case 'c': 117 f_statustime = 1; 118 f_accesstime = 0; 119 break; 120 case 'u': 121 f_accesstime = 1; 122 f_statustime = 0; 123 break; 124 case 'F': 125 f_type = 1; 126 break; 127 case 'L': 128 fts_options &= ~FTS_PHYSICAL; 129 fts_options |= FTS_LOGICAL; 130 break; 131 case 'R': 132 f_recursive = 1; 133 break; 134 case 'a': 135 fts_options |= FTS_SEEDOT; 136 /* FALLTHROUGH */ 137 case 'A': 138 f_listdot = 1; 139 break; 140 /* The -d option turns off the -R option. */ 141 case 'd': 142 f_listdir = 1; 143 f_recursive = 0; 144 break; 145 case 'f': 146 f_nosort = 1; 147 break; 148 case 'g': /* Compatibility with 4.3BSD. */ 149 break; 150 case 'i': 151 f_inode = 1; 152 break; 153 case 'o': 154 f_flags = 1; 155 break; 156 case 'q': 157 f_nonprint = 1; 158 break; 159 case 'r': 160 f_reversesort = 1; 161 break; 162 case 's': 163 f_size = 1; 164 break; 165 case 'T': 166 f_sectime = 1; 167 break; 168 case 't': 169 f_timesort = 1; 170 break; 171 case 'W': 172 f_whiteout = 1; 173 break; 174 default: 175 case '?': 176 usage(); 177 } 178 } 179 argc -= optind; 180 argv += optind; 181 182 /* 183 * If not -F, -i, -l, -s or -t options, don't require stat 184 * information. 185 */ 186 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type) 187 fts_options |= FTS_NOSTAT; 188 189 /* 190 * If not -F, -d or -l options, follow any symbolic links listed on 191 * the command line. 192 */ 193 if (!f_longform && !f_listdir && !f_type) 194 fts_options |= FTS_COMFOLLOW; 195 196 /* 197 * If -W, show whiteout entries 198 */ 199 if (f_whiteout) 200 fts_options |= FTS_WHITEOUT; 201 202 /* If -l or -s, figure out block size. */ 203 if (f_longform || f_size) { 204 (void)getbsize(¬used, &blocksize); 205 blocksize /= 512; 206 } 207 208 /* Select a sort function. */ 209 if (f_reversesort) { 210 if (!f_timesort) 211 sortfcn = revnamecmp; 212 else if (f_accesstime) 213 sortfcn = revacccmp; 214 else if (f_statustime) 215 sortfcn = revstatcmp; 216 else /* Use modification time. */ 217 sortfcn = revmodcmp; 218 } else { 219 if (!f_timesort) 220 sortfcn = namecmp; 221 else if (f_accesstime) 222 sortfcn = acccmp; 223 else if (f_statustime) 224 sortfcn = statcmp; 225 else /* Use modification time. */ 226 sortfcn = modcmp; 227 } 228 229 /* Select a print function. */ 230 if (f_singlecol) 231 printfcn = printscol; 232 else if (f_longform) 233 printfcn = printlong; 234 else 235 printfcn = printcol; 236 237 if (argc) 238 traverse(argc, argv, fts_options); 239 else 240 traverse(1, dotav, fts_options); 241 exit(0); 242 } 243 244 static int output; /* If anything output. */ 245 246 /* 247 * Traverse() walks the logical directory structure specified by the argv list 248 * in the order specified by the mastercmp() comparison function. During the 249 * traversal it passes linked lists of structures to display() which represent 250 * a superset (may be exact set) of the files to be displayed. 251 */ 252 static void 253 traverse(argc, argv, options) 254 int argc, options; 255 char *argv[]; 256 { 257 FTS *ftsp; 258 FTSENT *p, *chp; 259 int ch_options; 260 261 if ((ftsp = 262 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 263 err(1, NULL); 264 265 display(NULL, fts_children(ftsp, 0)); 266 if (f_listdir) 267 return; 268 269 /* 270 * If not recursing down this tree and don't need stat info, just get 271 * the names. 272 */ 273 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 274 275 while ((p = fts_read(ftsp)) != NULL) 276 switch (p->fts_info) { 277 case FTS_DC: 278 warnx("%s: directory causes a cycle", p->fts_name); 279 break; 280 case FTS_DNR: 281 case FTS_ERR: 282 warnx("%s: %s", p->fts_name, strerror(p->fts_errno)); 283 break; 284 case FTS_D: 285 if (p->fts_level != FTS_ROOTLEVEL && 286 p->fts_name[0] == '.' && !f_listdot) 287 break; 288 289 /* 290 * If already output something, put out a newline as 291 * a separator. If multiple arguments, precede each 292 * directory with its name. 293 */ 294 if (output) 295 (void)printf("\n%s:\n", p->fts_path); 296 else if (argc > 1) { 297 (void)printf("%s:\n", p->fts_path); 298 output = 1; 299 } 300 301 chp = fts_children(ftsp, ch_options); 302 display(p, chp); 303 304 if (!f_recursive && chp != NULL) 305 (void)fts_set(ftsp, p, FTS_SKIP); 306 break; 307 } 308 if (errno) 309 err(1, "fts_read"); 310 } 311 312 /* 313 * Display() takes a linked list of FTSENT structures and passes the list 314 * along with any other necessary information to the print function. P 315 * points to the parent directory of the display list. 316 */ 317 static void 318 display(p, list) 319 FTSENT *p, *list; 320 { 321 struct stat *sp; 322 DISPLAY d; 323 FTSENT *cur; 324 NAMES *np; 325 u_quad_t maxsize; 326 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 327 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 328 int entries, needstats; 329 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */ 330 331 /* 332 * If list is NULL there are two possibilities: that the parent 333 * directory p has no children, or that fts_children() returned an 334 * error. We ignore the error case since it will be replicated 335 * on the next call to fts_read() on the post-order visit to the 336 * directory p, and will be signalled in traverse(). 337 */ 338 if (list == NULL) 339 return; 340 341 needstats = f_inode || f_longform || f_size; 342 flen = 0; 343 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 344 bcfile = 0; 345 maxuser = maxgroup = maxflags = 0; 346 maxsize = 0; 347 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 348 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 349 warnx("%s: %s", 350 cur->fts_name, strerror(cur->fts_errno)); 351 cur->fts_number = NO_PRINT; 352 continue; 353 } 354 355 /* 356 * P is NULL if list is the argv list, to which different rules 357 * apply. 358 */ 359 if (p == NULL) { 360 /* Directories will be displayed later. */ 361 if (cur->fts_info == FTS_D && !f_listdir) { 362 cur->fts_number = NO_PRINT; 363 continue; 364 } 365 } else { 366 /* Only display dot file if -a/-A set. */ 367 if (cur->fts_name[0] == '.' && !f_listdot) { 368 cur->fts_number = NO_PRINT; 369 continue; 370 } 371 } 372 if (f_nonprint) 373 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 374 if (cur->fts_namelen > maxlen) 375 maxlen = cur->fts_namelen; 376 if (needstats) { 377 sp = cur->fts_statp; 378 if (sp->st_blocks > maxblock) 379 maxblock = sp->st_blocks; 380 if (sp->st_ino > maxinode) 381 maxinode = sp->st_ino; 382 if (sp->st_nlink > maxnlink) 383 maxnlink = sp->st_nlink; 384 if (sp->st_size > maxsize) 385 maxsize = sp->st_size; 386 387 btotal += sp->st_blocks; 388 if (f_longform) { 389 user = user_from_uid(sp->st_uid, 0); 390 if ((ulen = strlen(user)) > maxuser) 391 maxuser = ulen; 392 group = group_from_gid(sp->st_gid, 0); 393 if ((glen = strlen(group)) > maxgroup) 394 maxgroup = glen; 395 if (f_flags) { 396 flags = 397 flags_to_string(sp->st_flags, "-"); 398 if ((flen = strlen(flags)) > maxflags) 399 maxflags = flen; 400 } else 401 flen = 0; 402 403 if ((np = malloc(sizeof(NAMES) + 404 ulen + glen + flen + 3)) == NULL) 405 err(1, NULL); 406 407 np->user = &np->data[0]; 408 (void)strcpy(np->user, user); 409 np->group = &np->data[ulen + 1]; 410 (void)strcpy(np->group, group); 411 412 if (S_ISCHR(sp->st_mode) || 413 S_ISBLK(sp->st_mode)) 414 bcfile = 1; 415 416 if (f_flags) { 417 np->flags = &np->data[ulen + glen + 2]; 418 (void)strcpy(np->flags, flags); 419 } 420 cur->fts_pointer = np; 421 } 422 } 423 ++entries; 424 } 425 426 if (!entries) 427 return; 428 429 d.list = list; 430 d.entries = entries; 431 d.maxlen = maxlen; 432 if (needstats) { 433 d.bcfile = bcfile; 434 d.btotal = btotal; 435 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 436 d.s_block = strlen(buf); 437 d.s_flags = maxflags; 438 d.s_group = maxgroup; 439 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 440 d.s_inode = strlen(buf); 441 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 442 d.s_nlink = strlen(buf); 443 (void)snprintf(buf, sizeof(buf), "%qu", maxsize); 444 d.s_size = strlen(buf); 445 d.s_user = maxuser; 446 } 447 448 printfcn(&d); 449 output = 1; 450 451 if (f_longform) 452 for (cur = list; cur; cur = cur->fts_link) 453 free(cur->fts_pointer); 454 } 455 456 /* 457 * Ordering for mastercmp: 458 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 459 * as larger than directories. Within either group, use the sort function. 460 * All other levels use the sort function. Error entries remain unsorted. 461 */ 462 static int 463 mastercmp(a, b) 464 const FTSENT **a, **b; 465 { 466 int a_info, b_info; 467 468 a_info = (*a)->fts_info; 469 if (a_info == FTS_ERR) 470 return (0); 471 b_info = (*b)->fts_info; 472 if (b_info == FTS_ERR) 473 return (0); 474 475 if (a_info == FTS_NS || b_info == FTS_NS) 476 return (namecmp(*a, *b)); 477 478 if (a_info == b_info) 479 return (sortfcn(*a, *b)); 480 481 if ((*a)->fts_level == FTS_ROOTLEVEL) 482 if (a_info == FTS_D) 483 return (1); 484 else if (b_info == FTS_D) 485 return (-1); 486 else 487 return (sortfcn(*a, *b)); 488 else 489 return (sortfcn(*a, *b)); 490 } 491