1 /* 2 * Copyright (c) 1989, 1993 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\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 8.1 (Berkeley) 06/02/93"; 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 68 int 69 main(argc, argv) 70 int argc; 71 char *argv[]; 72 { 73 static char dot[] = ".", *dotav[] = { dot, NULL }; 74 struct winsize win; 75 int ch, fts_options, notused; 76 char *p; 77 78 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 79 if (isatty(STDOUT_FILENO)) { 80 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || 81 !win.ws_col) { 82 if (p = getenv("COLUMNS")) 83 termwidth = atoi(p); 84 } 85 else 86 termwidth = win.ws_col; 87 f_column = f_nonprint = 1; 88 } else 89 f_singlecol = 1; 90 91 /* Root is -A automatically. */ 92 if (!getuid()) 93 f_listdot = 1; 94 95 fts_options = FTS_PHYSICAL; 96 while ((ch = getopt(argc, argv, "1ACFLRTacdfgiloqrstu")) != EOF) { 97 switch (ch) { 98 /* 99 * The -1, -C and -l options all override each other so shell 100 * aliasing works right. 101 */ 102 case '1': 103 f_singlecol = 1; 104 f_column = f_longform = 0; 105 break; 106 case 'C': 107 f_column = 1; 108 f_longform = f_singlecol = 0; 109 break; 110 case 'l': 111 f_longform = 1; 112 f_column = f_singlecol = 0; 113 break; 114 /* The -c and -u options override each other. */ 115 case 'c': 116 f_statustime = 1; 117 f_accesstime = 0; 118 break; 119 case 'u': 120 f_accesstime = 1; 121 f_statustime = 0; 122 break; 123 case 'F': 124 f_type = 1; 125 break; 126 case 'L': 127 fts_options &= ~FTS_PHYSICAL; 128 fts_options |= FTS_LOGICAL; 129 break; 130 case 'R': 131 f_recursive = 1; 132 break; 133 case 'a': 134 fts_options |= FTS_SEEDOT; 135 /* FALLTHROUGH */ 136 case 'A': 137 f_listdot = 1; 138 break; 139 /* The -d option turns off the -R option. */ 140 case 'd': 141 f_listdir = 1; 142 f_recursive = 0; 143 break; 144 case 'f': 145 f_nosort = 1; 146 break; 147 case 'g': /* Compatibility with 4.3BSD. */ 148 break; 149 case 'i': 150 f_inode = 1; 151 break; 152 case 'o': 153 f_flags = 1; 154 break; 155 case 'q': 156 f_nonprint = 1; 157 break; 158 case 'r': 159 f_reversesort = 1; 160 break; 161 case 's': 162 f_size = 1; 163 break; 164 case 'T': 165 f_sectime = 1; 166 break; 167 case 't': 168 f_timesort = 1; 169 break; 170 default: 171 case '?': 172 usage(); 173 } 174 } 175 argc -= optind; 176 argv += optind; 177 178 /* 179 * If not -F, -i, -l, -s or -t options, don't require stat 180 * information. 181 */ 182 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type) 183 fts_options |= FTS_NOSTAT; 184 185 /* 186 * If not -F, -d or -l options, follow any symbolic links listed on 187 * the command line. 188 */ 189 if (!f_longform && !f_listdir && !f_type) 190 fts_options |= FTS_COMFOLLOW; 191 192 /* If -l or -s, figure out block size. */ 193 if (f_longform || f_size) { 194 (void)getbsize(¬used, &blocksize); 195 blocksize /= 512; 196 } 197 198 /* Select a sort function. */ 199 if (f_reversesort) { 200 if (!f_timesort) 201 sortfcn = revnamecmp; 202 else if (f_accesstime) 203 sortfcn = revacccmp; 204 else if (f_statustime) 205 sortfcn = revstatcmp; 206 else /* Use modification time. */ 207 sortfcn = revmodcmp; 208 } else { 209 if (!f_timesort) 210 sortfcn = namecmp; 211 else if (f_accesstime) 212 sortfcn = acccmp; 213 else if (f_statustime) 214 sortfcn = statcmp; 215 else /* Use modification time. */ 216 sortfcn = modcmp; 217 } 218 219 /* Select a print function. */ 220 if (f_singlecol) 221 printfcn = printscol; 222 else if (f_longform) 223 printfcn = printlong; 224 else 225 printfcn = printcol; 226 227 if (argc) 228 traverse(argc, argv, fts_options); 229 else 230 traverse(1, dotav, fts_options); 231 exit(0); 232 } 233 234 static int output; /* If anything output. */ 235 236 /* 237 * Traverse() walks the logical directory structure specified by the argv list 238 * in the order specified by the mastercmp() comparison function. During the 239 * traversal it passes linked lists of structures to display() which represent 240 * a superset (may be exact set) of the files to be displayed. 241 */ 242 static void 243 traverse(argc, argv, options) 244 int argc, options; 245 char *argv[]; 246 { 247 register FTS *ftsp; 248 register FTSENT *p, *chp; 249 int ch_options; 250 251 if ((ftsp = 252 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 253 err(1, NULL); 254 255 display(NULL, fts_children(ftsp, 0)); 256 if (f_listdir) 257 return; 258 259 /* 260 * If not recursing down this tree and don't need stat info, just get 261 * the names. 262 */ 263 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 264 265 while (p = fts_read(ftsp)) 266 switch (p->fts_info) { 267 case FTS_DC: 268 warnx("%s: directory causes a cycle", p->fts_name); 269 break; 270 case FTS_DNR: 271 case FTS_ERR: 272 errno = p->fts_errno; 273 warn("%s", p->fts_name); 274 break; 275 case FTS_D: 276 if (p->fts_level != FTS_ROOTLEVEL && 277 p->fts_name[0] == '.' && !f_listdot) 278 break; 279 280 /* 281 * If already output something, put out a newline as 282 * a separator. If multiple arguments, precede each 283 * directory with its name. 284 */ 285 if (output) 286 (void)printf("\n%s:\n", p->fts_path); 287 else if (argc > 1) { 288 (void)printf("%s:\n", p->fts_path); 289 output = 1; 290 } 291 292 chp = fts_children(ftsp, ch_options); 293 display(p, chp); 294 295 if (!f_recursive && chp != NULL) 296 (void)fts_set(ftsp, p, FTS_SKIP); 297 break; 298 } 299 (void)fts_close(ftsp); 300 } 301 302 /* 303 * Display() takes a linked list of FTSENT structures and passes the list 304 * along with any other necessary information to the print function. P 305 * points to the parent directory of the display list. 306 */ 307 static void 308 display(p, list) 309 register FTSENT *p; 310 FTSENT *list; 311 { 312 register FTSENT *cur; 313 struct stat *sp; 314 DISPLAY d; 315 NAMES *np; 316 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 317 u_quad_t maxsize; 318 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 319 int entries, needstats; 320 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */ 321 322 /* 323 * If list is NULL there are two possibilities: that the parent 324 * directory p has no children, or that fts_children() returned an 325 * error. We ignore the error case since it will be replicated 326 * on the next call to fts_read() on the post-order visit to the 327 * directory p, and will be signalled in traverse(). 328 */ 329 if (list == NULL) 330 return; 331 332 needstats = f_inode || f_longform || f_size; 333 flen = 0; 334 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 335 bcfile = 0; 336 maxuser = maxgroup = maxflags = 0; 337 maxsize = 0; 338 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 339 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 340 errno = cur->fts_errno; 341 warn("%s", cur->fts_name); 342 cur->fts_number = NO_PRINT; 343 continue; 344 } 345 346 /* 347 * P is NULL if list is the argv list, to which different rules 348 * apply. 349 */ 350 if (p == NULL) { 351 /* Directories will be displayed later. */ 352 if (cur->fts_info == FTS_D && !f_listdir) { 353 cur->fts_number = NO_PRINT; 354 continue; 355 } 356 } else { 357 /* Only display dot file if -a/-A set. */ 358 if (cur->fts_name[0] == '.' && !f_listdot) { 359 cur->fts_number = NO_PRINT; 360 continue; 361 } 362 } 363 if (f_nonprint) 364 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 365 if (cur->fts_namelen > maxlen) 366 maxlen = cur->fts_namelen; 367 if (needstats) { 368 sp = cur->fts_statp; 369 if (sp->st_blocks > maxblock) 370 maxblock = sp->st_blocks; 371 if (sp->st_ino > maxinode) 372 maxinode = sp->st_ino; 373 if (sp->st_nlink > maxnlink) 374 maxnlink = sp->st_nlink; 375 if (sp->st_size > maxsize) 376 maxsize = sp->st_size; 377 378 btotal += sp->st_blocks; 379 if (f_longform) { 380 user = user_from_uid(sp->st_uid, 0); 381 if ((ulen = strlen(user)) > maxuser) 382 maxuser = ulen; 383 group = group_from_gid(sp->st_gid, 0); 384 if ((glen = strlen(group)) > maxgroup) 385 maxgroup = glen; 386 if (f_flags) { 387 flags = 388 flags_to_string(sp->st_flags, "-"); 389 if ((flen = strlen(flags)) > maxflags) 390 maxflags = flen; 391 } else 392 flen = 0; 393 394 if ((np = malloc(sizeof(NAMES) + 395 ulen + glen + flen + 3)) == NULL) 396 err(1, NULL); 397 398 np->user = &np->data[0]; 399 (void)strcpy(np->user, user); 400 np->group = &np->data[ulen + 1]; 401 (void)strcpy(np->group, group); 402 403 if (S_ISCHR(sp->st_mode) || 404 S_ISBLK(sp->st_mode)) 405 bcfile = 1; 406 407 if (f_flags) { 408 np->flags = &np->data[ulen + glen + 2]; 409 (void)strcpy(np->flags, flags); 410 } 411 cur->fts_pointer = np; 412 } 413 } 414 ++entries; 415 } 416 417 if (!entries) 418 return; 419 420 d.list = list; 421 d.entries = entries; 422 d.maxlen = maxlen; 423 if (needstats) { 424 d.bcfile = bcfile; 425 d.btotal = btotal; 426 (void)snprintf(buf, sizeof(buf), "%lu", maxblock); 427 d.s_block = strlen(buf); 428 d.s_flags = maxflags; 429 d.s_group = maxgroup; 430 (void)snprintf(buf, sizeof(buf), "%lu", maxinode); 431 d.s_inode = strlen(buf); 432 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink); 433 d.s_nlink = strlen(buf); 434 (void)snprintf(buf, sizeof(buf), "%qu", maxsize); 435 d.s_size = strlen(buf); 436 d.s_user = maxuser; 437 } 438 439 printfcn(&d); 440 output = 1; 441 442 if (f_longform) 443 for (cur = list; cur; cur = cur->fts_link) 444 free(cur->fts_pointer); 445 } 446 447 /* 448 * Ordering for mastercmp: 449 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 450 * as larger than directories. Within either group, use the sort function. 451 * All other levels use the sort function. Error entries remain unsorted. 452 */ 453 static int 454 mastercmp(a, b) 455 const FTSENT **a, **b; 456 { 457 register int a_info, b_info; 458 459 a_info = (*a)->fts_info; 460 if (a_info == FTS_ERR) 461 return (0); 462 b_info = (*b)->fts_info; 463 if (b_info == FTS_ERR) 464 return (0); 465 466 if (a_info == FTS_NS || b_info == FTS_NS) 467 return (namecmp(*a, *b)); 468 469 if (a_info == b_info) 470 return (sortfcn(*a, *b)); 471 472 if ((*a)->fts_level == FTS_ROOTLEVEL) 473 if (a_info == FTS_D) 474 return (1); 475 else if (b_info == FTS_D) 476 return (-1); 477 else 478 return (sortfcn(*a, *b)); 479 else 480 return (sortfcn(*a, *b)); 481 } 482