1 /* 2 * Copyright (c) 1989 The Regents of the University of California. 3 * 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 The Regents of the University of California.\n\ 14 All rights reserved.\n"; 15 #endif /* not lint */ 16 17 #ifndef lint 18 static char sccsid[] = "@(#)ls.c 5.68 (Berkeley) 09/16/92"; 19 #endif /* not lint */ 20 21 #include <sys/types.h> 22 #include <sys/stat.h> 23 #include <sys/ioctl.h> 24 #include <dirent.h> 25 #include <unistd.h> 26 #include <fts.h> 27 #include <stdlib.h> 28 #include <string.h> 29 #include <errno.h> 30 #include <stdio.h> 31 #include "ls.h" 32 #include "extern.h" 33 34 char *getbsize __P((char *, int *, long *)); 35 char *group_from_gid __P((u_int, int)); 36 char *user_from_uid __P((u_int, int)); 37 38 static void display __P((FTSENT *, FTSENT *)); 39 static char *flags_from_fid __P((u_long)); 40 static int mastercmp __P((const FTSENT **, const FTSENT **)); 41 static void traverse __P((int, char **, int)); 42 43 static void (*printfcn) __P((DISPLAY *)); 44 static int (*sortfcn) __P((const FTSENT *, const FTSENT *)); 45 46 long blocksize; /* block size units */ 47 int termwidth = 80; /* default terminal width */ 48 49 /* flags */ 50 int f_accesstime; /* use time of last access */ 51 int f_column; /* columnated format */ 52 int f_flags; /* show flags associated with a file */ 53 int f_inode; /* print inode */ 54 int f_listdir; /* list actual directory, not contents */ 55 int f_listdot; /* list files beginning with . */ 56 int f_longform; /* long listing format */ 57 int f_newline; /* if precede with newline */ 58 int f_nonprint; /* show unprintables as ? */ 59 int f_nosort; /* don't sort output */ 60 int f_recursive; /* ls subdirectories also */ 61 int f_reversesort; /* reverse whatever sort is used */ 62 int f_sectime; /* print the real time for all files */ 63 int f_singlecol; /* use single column output */ 64 int f_size; /* list size in short listing */ 65 int f_statustime; /* use time of last mode change */ 66 int f_dirname; /* if precede with directory name */ 67 int f_timesort; /* sort by time vice name */ 68 int f_type; /* add type character for non-regular files */ 69 70 int 71 main(argc, argv) 72 int argc; 73 char *argv[]; 74 { 75 static char dot[] = ".", *dotav[] = { dot, NULL }; 76 struct winsize win; 77 int ch, fts_options, notused; 78 char *p; 79 80 /* Terminal defaults to -Cq, non-terminal defaults to -1. */ 81 if (isatty(STDOUT_FILENO)) { 82 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1 || 83 !win.ws_col) { 84 if (p = getenv("COLUMNS")) 85 termwidth = atoi(p); 86 } 87 else 88 termwidth = win.ws_col; 89 f_column = f_nonprint = 1; 90 } else 91 f_singlecol = 1; 92 93 /* Root is -A automatically. */ 94 if (!getuid()) 95 f_listdot = 1; 96 97 fts_options = FTS_PHYSICAL; 98 while ((ch = getopt(argc, argv, "1ACFLRTacdfgikloqrstu")) != EOF) { 99 switch (ch) { 100 /* 101 * The -1, -C and -l options all override each other so shell 102 * aliasing works right. 103 */ 104 case '1': 105 f_singlecol = 1; 106 f_column = f_longform = 0; 107 break; 108 case 'C': 109 f_column = 1; 110 f_longform = f_singlecol = 0; 111 break; 112 case 'l': 113 f_longform = 1; 114 f_column = f_singlecol = 0; 115 break; 116 /* The -c and -u options override each other. */ 117 case 'c': 118 f_statustime = 1; 119 f_accesstime = 0; 120 break; 121 case 'u': 122 f_accesstime = 1; 123 f_statustime = 0; 124 break; 125 case 'F': 126 f_type = 1; 127 break; 128 case 'L': 129 fts_options &= ~FTS_PHYSICAL; 130 fts_options |= FTS_LOGICAL; 131 break; 132 case 'R': 133 f_recursive = 1; 134 break; 135 case 'a': 136 fts_options |= FTS_SEEDOT; 137 /* FALLTHROUGH */ 138 case 'A': 139 f_listdot = 1; 140 break; 141 /* The -d option turns off the -R option. */ 142 case 'd': 143 f_listdir = 1; 144 f_recursive = 0; 145 break; 146 case 'f': 147 f_nosort = 1; 148 break; 149 case 'g': /* Compatibility with 4.3BSD. */ 150 break; 151 case 'i': 152 f_inode = 1; 153 break; 154 case 'k': /* Delete before 4.4BSD. */ 155 (void)fprintf(stderr, "ls: -k no longer supported\n"); 156 break; 157 case 'o': 158 f_flags = 1; 159 break; 160 case 'q': 161 f_nonprint = 1; 162 break; 163 case 'r': 164 f_reversesort = 1; 165 break; 166 case 's': 167 f_size = 1; 168 break; 169 case 'T': 170 f_sectime = 1; 171 break; 172 case 't': 173 f_timesort = 1; 174 break; 175 default: 176 case '?': 177 usage(); 178 } 179 } 180 argc -= optind; 181 argv += optind; 182 183 /* 184 * If not -F, -i, -l, -s or -t options, don't require stat 185 * information. 186 */ 187 if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type) 188 fts_options |= FTS_NOSTAT; 189 190 /* 191 * If not -F, -d or -l options, follow any symbolic links listed on 192 * the command line. 193 */ 194 if (!f_longform && !f_listdir && !f_type) 195 fts_options |= FTS_COMFOLLOW; 196 197 /* If -l or -s, figure out block size. */ 198 if (f_longform || f_size) { 199 (void)getbsize("ls", ¬used, &blocksize); 200 blocksize /= 512; 201 } 202 203 /* Select a sort function. */ 204 if (f_reversesort) { 205 if (!f_timesort) 206 sortfcn = revnamecmp; 207 else if (f_accesstime) 208 sortfcn = revacccmp; 209 else if (f_statustime) 210 sortfcn = revstatcmp; 211 else /* Use modification time. */ 212 sortfcn = revmodcmp; 213 } else { 214 if (!f_timesort) 215 sortfcn = namecmp; 216 else if (f_accesstime) 217 sortfcn = acccmp; 218 else if (f_statustime) 219 sortfcn = statcmp; 220 else /* Use modification time. */ 221 sortfcn = modcmp; 222 } 223 224 /* Select a print function. */ 225 if (f_singlecol) 226 printfcn = printscol; 227 else if (f_longform) 228 printfcn = printlong; 229 else 230 printfcn = printcol; 231 232 if (argc) 233 traverse(argc, argv, fts_options); 234 else 235 traverse(1, dotav, fts_options); 236 exit(0); 237 } 238 239 static int output; /* If anything output. */ 240 241 /* 242 * Traverse() walks the logical directory structure specified by the argv list 243 * in the order specified by the mastercmp() comparison function. During the 244 * traversal it passes linked lists of structures to display() which represent 245 * a superset (may be exact set) of the files to be displayed. 246 */ 247 static void 248 traverse(argc, argv, options) 249 int argc, options; 250 char *argv[]; 251 { 252 register FTS *ftsp; 253 register FTSENT *p; 254 int ch_options; 255 256 if ((ftsp = 257 fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL) 258 err(1, "%s", strerror(errno)); 259 260 display(NULL, fts_children(ftsp, 0)); 261 if (f_listdir) 262 return; 263 264 /* 265 * If not recursing down this tree and don't need stat info, just get 266 * the names. 267 */ 268 ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0; 269 270 while (p = fts_read(ftsp)) 271 switch(p->fts_info) { 272 case FTS_DC: 273 err(0, "%s: directory causes a cycle", p->fts_name); 274 break; 275 case FTS_DNR: 276 case FTS_ERR: 277 err(0, "%s: %s", 278 p->fts_name, strerror(p->fts_errno)); 279 break; 280 case FTS_D: 281 if (p->fts_level != FTS_ROOTLEVEL && 282 p->fts_name[0] == '.' && !f_listdot) 283 break; 284 285 /* 286 * If already output something, put out a newline as 287 * a separator. If multiple arguments, precede each 288 * directory with its name. 289 */ 290 if (output) 291 (void)printf("\n%s:\n", p->fts_path); 292 else if (argc > 1) { 293 (void)printf("%s:\n", p->fts_path); 294 output = 1; 295 } 296 297 display(p, fts_children(ftsp, ch_options)); 298 299 if (!f_recursive) 300 (void)fts_set(ftsp, p, FTS_SKIP); 301 break; 302 } 303 (void)fts_close(ftsp); 304 } 305 306 /* 307 * Display() takes a linked list of FTSENT structures and passes the list 308 * along with any other necessary information to the print function. P 309 * points to the parent directory of the display list. 310 */ 311 static void 312 display(p, list) 313 register FTSENT *p; 314 FTSENT *list; 315 { 316 register FTSENT *cur; 317 struct stat *sp; 318 DISPLAY d; 319 NAMES *np; 320 u_long btotal, maxblock, maxinode, maxlen, maxnlink; 321 u_quad_t maxsize; 322 int bcfile, flen, glen, ulen, maxflags, maxgroup, maxuser; 323 int entries, needstats; 324 char *user, *group, *flags, buf[20]; /* 32 bits == 10 digits */ 325 326 /* 327 * If list is NULL there are two possibilities: that the parent 328 * directory p has no children, or that fts_children() returned an 329 * error. We ignore the error case since it will be replicated 330 * on the next call to fts_read() on the post-order visit to the 331 * directory p, and will be signalled in traverse(). 332 */ 333 if (list == NULL) 334 return; 335 336 needstats = f_inode || f_longform || f_size; 337 flen = 0; 338 btotal = maxblock = maxinode = maxlen = maxnlink = 0; 339 bcfile = 0; 340 maxuser = maxgroup = maxflags = 0; 341 maxsize = 0; 342 for (cur = list, entries = 0; cur; cur = cur->fts_link) { 343 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) { 344 err(0, "%s: %s", 345 cur->fts_name, strerror(cur->fts_errno)); 346 cur->fts_number = NO_PRINT; 347 continue; 348 } 349 350 /* 351 * P is NULL if list is the argv list, to which different rules 352 * apply. 353 */ 354 if (p == NULL) { 355 /* Directories will be displayed later. */ 356 if (cur->fts_info == FTS_D && !f_listdir) { 357 cur->fts_number = NO_PRINT; 358 continue; 359 } 360 } else { 361 /* Only display dot file if -a/-A set. */ 362 if (cur->fts_name[0] == '.' && !f_listdot) { 363 cur->fts_number = NO_PRINT; 364 continue; 365 } 366 } 367 if (f_nonprint) 368 prcopy(cur->fts_name, cur->fts_name, cur->fts_namelen); 369 if (cur->fts_namelen > maxlen) 370 maxlen = cur->fts_namelen; 371 if (needstats) { 372 sp = cur->fts_statp; 373 if (sp->st_blocks > maxblock) 374 maxblock = sp->st_blocks; 375 if (sp->st_ino > maxinode) 376 maxinode = sp->st_ino; 377 if (sp->st_nlink > maxnlink) 378 maxnlink = sp->st_nlink; 379 if (sp->st_size > maxsize) 380 maxsize = sp->st_size; 381 382 btotal += sp->st_blocks; 383 if (f_longform) { 384 user = user_from_uid(sp->st_uid, 0); 385 if ((ulen = strlen(user)) > maxuser) 386 maxuser = ulen; 387 group = group_from_gid(sp->st_gid, 0); 388 if ((glen = strlen(group)) > maxgroup) 389 maxgroup = glen; 390 if (f_flags) { 391 flags = flags_from_fid(sp->st_flags); 392 if ((flen = strlen(flags)) > maxflags) 393 maxflags = flen; 394 } else 395 flen = 0; 396 397 if ((np = malloc(sizeof(NAMES) + 398 ulen + glen + flen + 3)) == NULL) 399 err(1, "%s", strerror(errno)); 400 401 np->user = &np->data[0]; 402 (void)strcpy(np->user, user); 403 np->group = &np->data[ulen + 1]; 404 (void)strcpy(np->group, group); 405 406 if (S_ISCHR(sp->st_mode) || 407 S_ISBLK(sp->st_mode)) 408 bcfile = 1; 409 410 if (f_flags) { 411 np->flags = &np->data[ulen + glen + 2]; 412 (void)strcpy(np->flags, flags); 413 } 414 cur->fts_pointer = np; 415 } 416 } 417 ++entries; 418 } 419 420 if (!entries) 421 return; 422 423 d.list = list; 424 d.entries = entries; 425 d.maxlen = maxlen; 426 if (needstats) { 427 d.bcfile = bcfile; 428 d.btotal = btotal; 429 d.s_block = snprintf(buf, sizeof(buf), "%lu", maxblock); 430 d.s_flags = maxflags; 431 d.s_group = maxgroup; 432 d.s_inode = snprintf(buf, sizeof(buf), "%lu", maxinode); 433 d.s_nlink = snprintf(buf, sizeof(buf), "%lu", maxnlink); 434 d.s_size = snprintf(buf, sizeof(buf), "%qu", maxsize); 435 d.s_user = maxuser; 436 } 437 438 printfcn(&d); 439 output = 1; 440 441 if (f_longform) 442 for (cur = list; cur; cur = cur->fts_link) 443 free(cur->fts_pointer); 444 } 445 446 /* 447 * Ordering for mastercmp: 448 * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories 449 * as larger than directories. Within either group, use the sort function. 450 * All other levels use the sort function. Error entries remain unsorted. 451 */ 452 static int 453 mastercmp(a, b) 454 const FTSENT **a, **b; 455 { 456 register int a_info, b_info; 457 458 a_info = (*a)->fts_info; 459 if (a_info == FTS_ERR) 460 return (0); 461 b_info = (*b)->fts_info; 462 if (b_info == FTS_ERR) 463 return (0); 464 465 if (a_info == FTS_NS || b_info == FTS_NS) 466 return (namecmp(*a, *b)); 467 468 if (a_info == b_info) 469 return (sortfcn(*a, *b)); 470 471 if ((*a)->fts_level == FTS_ROOTLEVEL) 472 if (a_info == FTS_D) 473 return (1); 474 else if (b_info == FTS_D) 475 return (-1); 476 else 477 return (sortfcn(*a, *b)); 478 else 479 return (sortfcn(*a, *b)); 480 } 481 482 static char * 483 flags_from_fid(flags) 484 u_long flags; 485 { 486 static char buf[20]; 487 register int comma; 488 register char *p; 489 490 p = buf; 491 if (flags & ARCHIVED) { 492 (void)strcpy(p, "arch"); 493 p += sizeof("arch") - 1; 494 comma = 1; 495 } else 496 comma = 0; 497 if (flags & NODUMP) { 498 if (comma++) 499 *p++ = ','; 500 (void)strcpy(p, "nodump"); 501 p += sizeof("nodump") - 1; 502 } 503 if (flags & IMMUTABLE) { 504 if (comma++) 505 *p++ = ','; 506 (void)strcpy(p, "nochg"); 507 p += sizeof("nochg") - 1; 508 } 509 if (!comma) 510 (void)strcpy(p, "-"); 511 return (buf); 512 } 513