ls/ls.c

   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
  37 #include <sys/cdefs.h>
  38 #ifndef lint
  39 __used static const char copyright[] =
  40 "@(#) Copyright (c) 1989, 1993, 1994\n\
  41         The Regents of the University of California.  All rights reserved.\n";
  42 #endif /* not lint */
  43
  44 #if 0
  45 #ifndef lint
  46 static char sccsid[] = "@(#)ls.c        8.5 (Berkeley) 4/2/94";
  47 #endif /* not lint */
  48 #endif
  49 #include <sys/cdefs.h>
  50 __RCSID("$FreeBSD: src/bin/ls/ls.c,v 1.66 2002/09/21 01:28:36 wollman Exp $");
  51
  52 #include <sys/types.h>
  53 #include <sys/stat.h>
  54 #include <sys/ioctl.h>
  55
  56 #include <dirent.h>
  57 #include <err.h>
  58 #include <errno.h>
  59 #include <fts.h>
  60 #include <grp.h>
  61 #include <limits.h>
  62 #include <locale.h>
  63 #include <pwd.h>
  64 #include <stdio.h>
  65 #include <stdlib.h>
  66 #include <string.h>
  67 #include <unistd.h>
  68 #ifdef COLORLS
  69 #include <termcap.h>
  70 #include <signal.h>
  71 #endif
  72 #ifdef __APPLE__
  73 #include <sys/acl.h>
  74 #include <sys/xattr.h>
  75 #include <sys/param.h>
  76 #include <get_compat.h>
  77 #include <sys/sysctl.h>
  78 #include <System/sys/fsctl.h>
  79 #else
  80 #define COMPAT_MODE(a,b) (1)
  81 #endif /* __APPLE__ */
  82 #include "ls.h"
  83 #include "extern.h"
  84
  85 /*
  86  * Upward approximation of the maximum number of characters needed to
  87  * represent a value of integral type t as a string, excluding the
  88  * NUL terminator, with provision for a sign.
  89  */
  90 #define STRBUF_SIZEOF(t)        (1 + CHAR_BIT * sizeof(t) / 3 + 1)
  91
  92 #define IS_DATALESS(sp)         (f_dataless && (sp) && ((sp)->st_flags & SF_DATALESS))
  93
  94 static void      display(FTSENT *, FTSENT *);
  95 static u_quad_t  makenines(u_quad_t);
  96 static int       mastercmp(const FTSENT **, const FTSENT **);
  97 static void      traverse(int, char **, int);
  98
  99 static void (*printfcn)(DISPLAY *);
 100 static int (*sortfcn)(const FTSENT *, const FTSENT *);
 101
 102 long blocksize;                 /* block size units */
 103 int termwidth = 80;             /* default terminal width */
 104
 105 /* flags */
 106        int f_accesstime;        /* use time of last access */
 107        int f_birthtime;         /* use time of file birth */
 108        int f_flags;             /* show flags associated with a file */
 109        int f_humanval;          /* show human-readable file sizes */
 110        int f_inode;             /* print inode */
 111 static int f_kblocks;           /* print size in kilobytes */
 112 static int f_listdir;           /* list actual directory, not contents */
 113 static int f_listdot;           /* list files beginning with . */
 114        int f_longform;          /* long listing format */
 115        int f_nonprint;          /* show unprintables as ? */
 116 static int f_nosort;            /* don't sort output */
 117        int f_notabs;            /* don't use tab-separated multi-col output */
 118        int f_numericonly;       /* don't convert uid/gid to name */
 119        int f_octal;             /* show unprintables as \xxx */
 120        int f_octal_escape;      /* like f_octal but use C escapes if possible */
 121 static int f_recursive;         /* ls subdirectories also */
 122 static int f_reversesort;       /* reverse whatever sort is used */
 123        int f_sectime;           /* print the real time for all files */
 124 static int f_singlecol;         /* use single column output */
 125        int f_size;              /* list size in short listing */
 126        int f_slash;             /* similar to f_type, but only for dirs */
 127        int f_sortacross;        /* sort across rows, not down columns */
 128        int f_statustime;        /* use time of last mode change */
 129        int f_stream;            /* stream the output, separate with commas */
 130 static int f_timesort;          /* sort by time vice name */
 131 static int f_sizesort;          /* sort by size */
 132        int f_type;              /* add type character for non-regular files */
 133 static int f_whiteout;          /* show whiteout entries */
 134        int f_acl;               /* show ACLs in long listing */
 135        int f_xattr;             /* show extended attributes in long listing */
 136        int f_group;             /* show group */
 137        int f_owner;             /* show owner */
 138        int f_dataless;          /* distinguish dataless files in long listing,
 139                                    and don't materialize dataless directories. */
 140 #ifdef COLORLS
 141        int f_color;             /* add type in color for non-regular files */
 142
 143 char *ansi_bgcol;               /* ANSI sequence to set background colour */
 144 char *ansi_fgcol;               /* ANSI sequence to set foreground colour */
 145 char *ansi_coloff;              /* ANSI sequence to reset colours */
 146 char *attrs_off;                /* ANSI sequence to turn off attributes */
 147 char *enter_bold;               /* ANSI sequence to set color to bold mode */
 148 #endif
 149
 150 static int rval;
 151
 152 int
 153 main(int argc, char *argv[])
 154 {
 155         static char dot[] = ".", *dotav[] = {dot, NULL};
 156         struct winsize win;
 157         int ch, fts_options, notused;
 158         char *p;
 159 #ifdef COLORLS
 160         char termcapbuf[1024];  /* termcap definition buffer */
 161         char tcapbuf[512];      /* capability buffer */
 162         char *bp = tcapbuf;
 163 #endif
 164
 165         if (argc < 1)
 166                 usage();
 167         (void)setlocale(LC_ALL, "");
 168
 169         /* Terminal defaults to -Cq, non-terminal defaults to -1. */
 170         if (isatty(STDOUT_FILENO)) {
 171                 termwidth = 80;
 172                 if ((p = getenv("COLUMNS")) != NULL && *p != '\0')
 173                         termwidth = atoi(p);
 174                 else if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) != -1 &&
 175                     win.ws_col > 0)
 176                         termwidth = win.ws_col;
 177                 f_nonprint = 1;
 178         } else {
 179                 f_singlecol = 1;
 180                 /* retrieve environment variable, in case of explicit -C */
 181                 p = getenv("COLUMNS");
 182                 if (p)
 183                         termwidth = atoi(p);
 184         }
 185
 186         /* Root is -A automatically. */
 187         if (!getuid())
 188                 f_listdot = 1;
 189
 190         fts_options = FTS_PHYSICAL;
 191         while ((ch = getopt(argc, argv, "1@ABCFGHLOPRSTUWabcdefghiklmnopqrstuvwx%"))
 192             != -1) {
 193                 switch (ch) {
 194                 /*
 195                  * The -1, -C, -x and -l options all override each other so
 196                  * shell aliasing works right.
 197                  */
 198                 case '1':
 199                         f_singlecol = 1;
 200                         f_longform = 0;
 201                         f_stream = 0;
 202                         break;
 203                 case 'B':
 204                         f_nonprint = 0;
 205                         f_octal = 1;
 206                         f_octal_escape = 0;
 207                         break;
 208                 case 'C':
 209                         f_sortacross = f_longform = f_singlecol = 0;
 210                         break;
 211                 case 'l':
 212                         f_longform = 1;
 213                         f_singlecol = 0;
 214                         f_stream = 0;
 215                         break;
 216                 case 'x':
 217                         f_sortacross = 1;
 218                         f_longform = 0;
 219                         f_singlecol = 0;
 220                         break;
 221                 /* The -c and -u options override each other. */
 222                 case 'c':
 223                         f_statustime = 1;
 224                         f_accesstime = f_birthtime = 0;
 225                         break;
 226                 case 'u':
 227                         f_accesstime = 1;
 228                         f_statustime = f_birthtime = 0;
 229                         break;
 230                 case 'U':
 231                         f_birthtime = 1;
 232                         f_statustime = f_accesstime = 0;
 233                         break;
 234                 case 'F':
 235                         f_type = 1;
 236                         f_slash = 0;
 237                         break;
 238                 case 'H':
 239                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 240                                 fts_options &= ~FTS_LOGICAL;
 241                                 fts_options |= FTS_PHYSICAL;
 242                                 fts_options |= FTS_COMFOLLOWDIR;
 243                         } else
 244                                 fts_options |= FTS_COMFOLLOW;
 245                         break;
 246                 case 'G':
 247                         setenv("CLICOLOR", "", 1);
 248                         break;
 249                 case 'L':
 250                         fts_options &= ~FTS_PHYSICAL;
 251                         fts_options |= FTS_LOGICAL;
 252                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 253                                 fts_options &= ~(FTS_COMFOLLOW|FTS_COMFOLLOWDIR);
 254                         }
 255                         break;
 256                 case 'P':
 257                         fts_options &= ~(FTS_COMFOLLOW|FTS_COMFOLLOWDIR);
 258                         fts_options &= ~FTS_LOGICAL;
 259                         fts_options |= FTS_PHYSICAL;
 260                         break;
 261                 case 'R':
 262                         f_recursive = 1;
 263                         break;
 264                 case 'a':
 265                         fts_options |= FTS_SEEDOT;
 266                         /* FALLTHROUGH */
 267                 case 'A':
 268                         f_listdot = 1;
 269                         break;
 270                 /* The -d option turns off the -R option. */
 271                 case 'd':
 272                         f_listdir = 1;
 273                         f_recursive = 0;
 274                         break;
 275                 case 'f':
 276                         f_nosort = 1;
 277                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 278                                 fts_options |= FTS_SEEDOT;
 279                                 f_listdot = 1;
 280                         }
 281                         break;
 282                 case 'g':       /* Compatibility with Unix03 */
 283                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 284                                 f_group = 1;
 285                                 f_longform = 1;
 286                                 f_singlecol = 0;
 287                                 f_stream = 0;
 288                         }
 289                         break;
 290                 case 'h':
 291                         f_humanval = 1;
 292                         break;
 293                 case 'i':
 294                         f_inode = 1;
 295                         break;
 296                 case 'k':
 297                         f_kblocks = 1;
 298                         break;
 299                 case 'm':
 300                         f_stream = 1;
 301                         f_singlecol = 0;
 302                         f_longform = 0;
 303                         break;
 304                 case 'n':
 305                         f_numericonly = 1;
 306                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 307                                 f_longform = 1;
 308                                 f_singlecol = 0;
 309                                 f_stream = 0;
 310                         }
 311                         break;
 312                 case 'o':
 313                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 314                                 f_owner = 1;
 315                                 f_longform = 1;
 316                                 f_singlecol = 0;
 317                                 f_stream = 0;
 318                         } else {
 319                                 f_flags = 1;
 320                         }
 321                         break;
 322                 case 'p':
 323                         f_slash = 1;
 324                         f_type = 1;
 325                         break;
 326                 case 'q':
 327                         f_nonprint = 1;
 328                         f_octal = 0;
 329                         f_octal_escape = 0;
 330                         break;
 331                 case 'r':
 332                         f_reversesort = 1;
 333                         break;
 334                 case 'S':
 335                         /* Darwin 1.4.1 compatibility */
 336                         f_sizesort = 1;
 337                         break;
 338                 case 's':
 339                         f_size = 1;
 340                         break;
 341                 case 'T':
 342                         f_sectime = 1;
 343                         break;
 344                 case 't':
 345                         f_timesort = 1;
 346                         break;
 347                 case 'W':
 348                         f_whiteout = 1;
 349                         break;
 350                 case 'v':
 351                         /* Darwin 1.4.1 compatibility */
 352                         f_nonprint = 0;
 353                         break;
 354                 case 'b':
 355                         f_nonprint = 0;
 356                         f_octal = 0;
 357                         f_octal_escape = 1;
 358                         break;
 359                 case 'w':
 360                         f_nonprint = 0;
 361                         f_octal = 0;
 362                         f_octal_escape = 0;
 363                         break;
 364                 case 'e':
 365                         f_acl = 1;
 366                         break;
 367                 case '@':
 368                         f_xattr = 1;
 369                         break;
 370                 case 'O':
 371                         f_flags = 1;
 372                         break;
 373                 case '%':
 374                         f_dataless = 1;
 375                         break;
 376                 default:
 377                 case '?':
 378                         usage();
 379                 }
 380         }
 381         argc -= optind;
 382         argv += optind;
 383
 384         /* Enabling of colours is conditional on the environment. */
 385         if (getenv("CLICOLOR") &&
 386             (isatty(STDOUT_FILENO) || getenv("CLICOLOR_FORCE")))
 387 #ifdef COLORLS
 388                 if (tgetent(termcapbuf, getenv("TERM")) == 1) {
 389                         ansi_fgcol = tgetstr("AF", &bp);
 390                         ansi_bgcol = tgetstr("AB", &bp);
 391                         attrs_off = tgetstr("me", &bp);
 392                         enter_bold = tgetstr("md", &bp);
 393
 394                         /* To switch colours off use 'op' if
 395                          * available, otherwise use 'oc', or
 396                          * don't do colours at all. */
 397                         ansi_coloff = tgetstr("op", &bp);
 398                         if (!ansi_coloff)
 399                                 ansi_coloff = tgetstr("oc", &bp);
 400                         if (ansi_fgcol && ansi_bgcol && ansi_coloff)
 401                                 f_color = 1;
 402                 }
 403 #else
 404                 (void)fprintf(stderr, "Color support not compiled in.\n");
 405 #endif /*COLORLS*/
 406
 407 #ifdef COLORLS
 408         if (f_color) {
 409                 /*
 410                  * We can't put tabs and color sequences together:
 411                  * column number will be incremented incorrectly
 412                  * for "stty oxtabs" mode.
 413                  */
 414                 f_notabs = 1;
 415                 (void)signal(SIGINT, colorquit);
 416                 (void)signal(SIGQUIT, colorquit);
 417                 parsecolors(getenv("LSCOLORS"));
 418         }
 419 #endif
 420
 421         /*
 422          * If not -F, -i, -l, -s, -t or -% options, don't require stat
 423          * information, unless in color mode in which case we do
 424          * need this to determine which colors to display.
 425          */
 426         if (!f_inode && !f_longform && !f_size && !f_timesort && !f_type && !f_sizesort && !f_dataless
 427 #ifdef COLORLS
 428             && !f_color
 429 #endif
 430             )
 431                 fts_options |= FTS_NOSTAT;
 432
 433         /*
 434          * If not -F, -d or -l options, follow any symbolic links listed on
 435          * the command line.
 436          */
 437         if (!f_longform && !f_listdir && !f_type && !f_inode)
 438                 fts_options |= FTS_COMFOLLOW;
 439
 440         /*
 441          * If -W, show whiteout entries
 442          */
 443 #ifdef FTS_WHITEOUT
 444         if (f_whiteout)
 445                 fts_options |= FTS_WHITEOUT;
 446 #endif
 447
 448         /* If -l or -s, figure out block size. */
 449         if (f_longform || f_size) {
 450                 if (f_kblocks)
 451                         blocksize = 2;
 452                 else {
 453                         (void)getbsize(&notused, &blocksize);
 454                         blocksize /= 512;
 455                 }
 456         }
 457         /* Select a sort function. */
 458         if (f_reversesort) {
 459                 if (f_sizesort)
 460                         sortfcn = revsizecmp;
 461                 else if (!f_timesort)
 462                         sortfcn = revnamecmp;
 463                 else if (f_accesstime)
 464                         sortfcn = revacccmp;
 465                 else if (f_statustime)
 466                         sortfcn = revstatcmp;
 467                 else if (f_birthtime)
 468                         sortfcn = revbirthcmp;
 469                 else            /* Use modification time. */
 470                         sortfcn = revmodcmp;
 471         } else {
 472                 if (f_sizesort)
 473                         sortfcn = sizecmp;
 474                 else if (!f_timesort)
 475                         sortfcn = namecmp;
 476                 else if (f_accesstime)
 477                         sortfcn = acccmp;
 478                 else if (f_statustime)
 479                         sortfcn = statcmp;
 480                 else if (f_birthtime)
 481                         sortfcn = birthcmp;
 482                 else            /* Use modification time. */
 483                         sortfcn = modcmp;
 484         }
 485
 486         /* Select a print function. */
 487         if (f_singlecol)
 488                 printfcn = printscol;
 489         else if (f_longform)
 490                 printfcn = printlong;
 491         else if (f_stream)
 492                 printfcn = printstream;
 493         else
 494                 printfcn = printcol;
 495
 496 #ifdef __APPLE__
 497         if (f_dataless) {
 498                 // don't materialize dataless directories from the cloud
 499                 // (particularly usefull when listing recursively)
 500                 int state = 1;
 501                 if (sysctlbyname("vfs.nspace.prevent_materialization", NULL, NULL, &state, sizeof(state)) < 0) {
 502                         err(1, "prevent_materialization");
 503                 }
 504         }
 505 #endif /* __APPLE__ */
 506
 507         if (argc)
 508                 traverse(argc, argv, fts_options);
 509         else
 510                 traverse(1, dotav, fts_options);
 511         exit(rval);
 512 }
 513
 514 static int output;              /* If anything output. */
 515
 516 /*
 517  * Traverse() walks the logical directory structure specified by the argv list
 518  * in the order specified by the mastercmp() comparison function.  During the
 519  * traversal it passes linked lists of structures to display() which represent
 520  * a superset (may be exact set) of the files to be displayed.
 521  */
 522 static void
 523 traverse(int argc, char *argv[], int options)
 524 {
 525         FTS *ftsp;
 526         FTSENT *p, *chp;
 527         int ch_options, error;
 528
 529         if ((ftsp =
 530             fts_open(argv, options, f_nosort ? NULL : mastercmp)) == NULL)
 531                 err(1, "fts_open");
 532
 533         display(NULL, fts_children(ftsp, 0));
 534         if (f_listdir) {
 535                 fts_close(ftsp);
 536                 return;
 537         }
 538
 539         /*
 540          * If not recursing down this tree and don't need stat info, just get
 541          * the names.
 542          */
 543         ch_options = !f_recursive && options & FTS_NOSTAT ? FTS_NAMEONLY : 0;
 544
 545         while ((p = fts_read(ftsp)) != NULL)
 546                 switch (p->fts_info) {
 547                 case FTS_DC:
 548                         warnx("%s: directory causes a cycle", p->fts_name);
 549                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 550                                 rval = 1;
 551                         }
 552                         break;
 553                 case FTS_DNR:
 554                 case FTS_ERR:
 555                         warnx("%s: %s", p->fts_name, strerror(p->fts_errno));
 556                         rval = 1;
 557                         break;
 558                 case FTS_D:
 559                         if (p->fts_level != FTS_ROOTLEVEL &&
 560                             p->fts_name[0] == '.' && !f_listdot) {
 561                                 fts_set(ftsp, p, FTS_SKIP);
 562                                 break;
 563                         }
 564
 565                         if (IS_DATALESS(p->fts_statp)) {
 566                                 fts_set(ftsp, p, FTS_SKIP);
 567                                 break;
 568                         }
 569
 570                         /*
 571                          * If already output something, put out a newline as
 572                          * a separator.  If multiple arguments, precede each
 573                          * directory with its name.
 574                          */
 575                         if (output)
 576                                 (void)printf("\n%s:\n", p->fts_path);
 577                         else if (argc > 1) {
 578                                 (void)printf("%s:\n", p->fts_path);
 579                                 output = 1;
 580                         }
 581                         chp = fts_children(ftsp, ch_options);
 582                         if (COMPAT_MODE("bin/ls", "Unix2003") && ((options & FTS_LOGICAL)!=0)) {
 583                                 FTSENT *curr;
 584                                 for (curr = chp; curr; curr = curr->fts_link) {
 585                                         if (curr->fts_info == FTS_SLNONE)
 586                                                 curr->fts_number = NO_PRINT;
 587                                 }
 588                         }
 589                         display(p, chp);
 590
 591                         if (!f_recursive && chp != NULL)
 592                                 (void)fts_set(ftsp, p, FTS_SKIP);
 593                         break;
 594                 case FTS_SLNONE:        /* Same as default unless Unix conformance */
 595                         if (COMPAT_MODE("bin/ls", "Unix2003")) {
 596                                 if ((options & FTS_LOGICAL)!=0) {       /* -L was specified */
 597                                         warnx("%s: %s", p->fts_name, strerror(p->fts_errno ?: ENOENT));
 598                                         rval = 1;
 599                                 }
 600                         }
 601                         break;
 602                 default:
 603                         break;
 604                 }
 605         error = errno;
 606         fts_close(ftsp);
 607         errno = error;
 608
 609         if (errno)
 610                 err(1, "fts_read");
 611 }
 612
 613 /*
 614  * Display() takes a linked list of FTSENT structures and passes the list
 615  * along with any other necessary information to the print function.  P
 616  * points to the parent directory of the display list.
 617  */
 618 static void
 619 display(FTSENT *p, FTSENT *list)
 620 {
 621         struct stat *sp;
 622         DISPLAY d;
 623         FTSENT *cur;
 624         NAMES *np;
 625         off_t maxsize;
 626         u_int64_t btotal, maxblock;
 627         u_long lattrlen, maxlen, maxnlink, maxlattr;
 628         ino_t maxinode;
 629         int bcfile, maxflags;
 630         gid_t maxgroup;
 631         uid_t maxuser;
 632         size_t flen, ulen, glen;
 633         char *initmax;
 634         int entries, needstats;
 635         const char *user, *group;
 636         char *flags, *lattr = NULL;
 637         char buf[STRBUF_SIZEOF(u_quad_t) + 1];
 638         char ngroup[STRBUF_SIZEOF(uid_t) + 1];
 639         char nuser[STRBUF_SIZEOF(gid_t) + 1];
 640 #ifdef __APPLE__
 641         acl_entry_t dummy;
 642         ssize_t xattr_size;
 643         char *filename;
 644         char path[MAXPATHLEN+1];
 645 #endif // __APPLE__
 646         /*
 647          * If list is NULL there are two possibilities: that the parent
 648          * directory p has no children, or that fts_children() returned an
 649          * error.  We ignore the error case since it will be replicated
 650          * on the next call to fts_read() on the post-order visit to the
 651          * directory p, and will be signaled in traverse().
 652          */
 653         if (list == NULL)
 654                 return;
 655
 656         needstats = f_inode || f_longform || f_size;
 657         btotal = 0;
 658         initmax = getenv("LS_COLWIDTHS");
 659         /* Fields match -lios order.  New ones should be added at the end. */
 660         maxlattr = maxblock = maxinode = maxlen = maxnlink =
 661             maxuser = maxgroup = maxflags = maxsize = 0;
 662         if (initmax != NULL && *initmax != '\0') {
 663                 char *initmax2, *jinitmax;
 664                 int ninitmax;
 665
 666                 /* Fill-in "::" as "0:0:0" for the sake of scanf. */
 667                 jinitmax = initmax2 = malloc(strlen(initmax) * 2 + 2);
 668                 if (jinitmax == NULL)
 669                         err(1, "malloc");
 670                 if (*initmax == ':')
 671                         strcpy(initmax2, "0:"), initmax2 += 2;
 672                 else
 673                         *initmax2++ = *initmax, *initmax2 = '\0';
 674                 for (initmax++; *initmax != '\0'; initmax++) {
 675                         if (initmax[-1] == ':' && initmax[0] == ':') {
 676                                 *initmax2++ = '0';
 677                                 *initmax2++ = initmax[0];
 678                                 initmax2[1] = '\0';
 679                         } else {
 680                                 *initmax2++ = initmax[0];
 681                                 initmax2[1] = '\0';
 682                         }
 683                 }
 684                 if (initmax2[-1] == ':')
 685                         strcpy(initmax2, "0");
 686
 687                 ninitmax = sscanf(jinitmax,
 688 #if _DARWIN_FEATURE_64_BIT_INODE
 689                     " %llu : %qu : %lu : %i : %i : %i : %qu : %lu : %lu ",
 690 #else
 691                     " %lu : %qu : %lu : %i : %i : %i : %qu : %lu : %lu ",
 692 #endif
 693                     &maxinode, &maxblock, &maxnlink, &maxuser,
 694                     &maxgroup, &maxflags, &maxsize, &maxlen, &maxlattr);
 695                 f_notabs = 1;
 696                 switch (ninitmax) {
 697                 case 0:
 698                         maxinode = 0;
 699                         /* FALLTHROUGH */
 700                 case 1:
 701                         maxblock = 0;
 702                         /* FALLTHROUGH */
 703                 case 2:
 704                         maxnlink = 0;
 705                         /* FALLTHROUGH */
 706                 case 3:
 707                         maxuser = 0;
 708                         /* FALLTHROUGH */
 709                 case 4:
 710                         maxgroup = 0;
 711                         /* FALLTHROUGH */
 712                 case 5:
 713                         maxflags = 0;
 714                         /* FALLTHROUGH */
 715                 case 6:
 716                         maxsize = 0;
 717                         /* FALLTHROUGH */
 718                 case 7:
 719                         maxlen = 0;
 720                         /* FALLTHROUGH */
 721                 case 8:
 722                         maxlattr = 0;
 723                         /* FALLTHROUGH */
 724 #ifdef COLORLS
 725                         if (!f_color)
 726 #endif
 727                                 f_notabs = 0;
 728                         /* FALLTHROUGH */
 729                 default:
 730                         break;
 731                 }
 732                 maxinode = makenines(maxinode);
 733                 maxblock = makenines(maxblock);
 734                 maxnlink = makenines(maxnlink);
 735                 maxsize = makenines(maxsize);
 736         }
 737         bcfile = 0;
 738         flags = NULL;
 739         for (cur = list, entries = 0; cur; cur = cur->fts_link) {
 740                 if (cur->fts_info == FTS_ERR || cur->fts_info == FTS_NS) {
 741                         warnx("%s: %s",
 742                             cur->fts_name, strerror(cur->fts_errno));
 743                         cur->fts_number = NO_PRINT;
 744                         rval = 1;
 745                         continue;
 746                 }
 747                 /*
 748                  * P is NULL if list is the argv list, to which different rules
 749                  * apply.
 750                  */
 751                 if (p == NULL) {
 752                         /* Directories will be displayed later. */
 753                         if (cur->fts_info == FTS_D && !f_listdir) {
 754                                 cur->fts_number = NO_PRINT;
 755                                 continue;
 756                         }
 757                 } else {
 758                         /* Only display dot file if -a/-A set. */
 759                         if (cur->fts_name[0] == '.' && !f_listdot) {
 760                                 cur->fts_number = NO_PRINT;
 761                                 continue;
 762                         }
 763                 }
 764                 if (cur->fts_namelen > maxlen)
 765                         maxlen = cur->fts_namelen;
 766                 if (f_octal || f_octal_escape) {
 767                         u_long t = len_octal(cur->fts_name, cur->fts_namelen);
 768
 769                         if (t > maxlen)
 770                                 maxlen = t;
 771                 }
 772                 if (needstats) {
 773                         sp = cur->fts_statp;
 774                         if (sp->st_blocks > maxblock)
 775                                 maxblock = sp->st_blocks;
 776                         if (sp->st_ino > maxinode)
 777                                 maxinode = sp->st_ino;
 778                         if (sp->st_nlink > maxnlink)
 779                                 maxnlink = sp->st_nlink;
 780                         if (sp->st_size > maxsize)
 781                                 maxsize = sp->st_size;
 782
 783                         btotal += sp->st_blocks;
 784                         if (f_longform) {
 785                                 if (f_numericonly) {
 786                                         (void)snprintf(nuser, sizeof(nuser),
 787                                             "%u", sp->st_uid);
 788                                         (void)snprintf(ngroup, sizeof(ngroup),
 789                                             "%u", sp->st_gid);
 790                                         user = nuser;
 791                                         group = ngroup;
 792                                 } else {
 793                                         user = user_from_uid(sp->st_uid, 0);
 794                                         group = group_from_gid(sp->st_gid, 0);
 795                                 }
 796                                 if ((ulen = strlen(user)) > maxuser)
 797                                         maxuser = ulen;
 798                                 if ((glen = strlen(group)) > maxgroup)
 799                                         maxgroup = glen;
 800                                 if (f_flags) {
 801                                         flags = fflagstostr(sp->st_flags);
 802                                         if (flags != NULL && *flags == '\0') {
 803                                                 free(flags);
 804                                                 flags = strdup("-");
 805                                         }
 806                                         if (flags == NULL)
 807                                                 err(1, "fflagstostr");
 808                                         flen = strlen(flags);
 809                                         if (flen > (size_t)maxflags)
 810                                                 maxflags = flen;
 811                                 } else
 812                                         flen = 0;
 813                                 lattr = NULL;
 814                                 lattrlen = 0;
 815
 816                                 if ((np = calloc(1, sizeof(NAMES) + lattrlen +
 817                                     ulen + glen + flen + 4)) == NULL)
 818                                         err(1, "malloc");
 819
 820                                 np->user = &np->data[0];
 821                                 (void)strcpy(np->user, user);
 822                                 np->group = &np->data[ulen + 1];
 823                                 (void)strcpy(np->group, group);
 824 #ifdef __APPLE__
 825                                 if (cur->fts_level == FTS_ROOTLEVEL) {
 826                                         filename = cur->fts_name;
 827                                 } else {
 828                                         snprintf(path, sizeof(path), "%s/%s", cur->fts_parent->fts_accpath, cur->fts_name);
 829                                         filename = path;
 830                                 }
 831                                 xattr_size = listxattr(filename, NULL, 0, XATTR_NOFOLLOW);
 832                                 if (xattr_size < 0) {
 833                                         xattr_size = 0;
 834                                 }
 835                                 if ((xattr_size > 0) && f_xattr) {
 836                                         /* collect sizes */
 837                                         np->xattr_names = malloc(xattr_size);
 838                                         listxattr(filename, np->xattr_names, xattr_size, XATTR_NOFOLLOW);
 839                                         for (char *name = np->xattr_names; name < np->xattr_names + xattr_size;
 840                                              name += strlen(name)+1) {
 841                                                 np->xattr_sizes = reallocf(np->xattr_sizes, (np->xattr_count+1) * sizeof(np->xattr_sizes[0]));
 842                                                 np->xattr_sizes[np->xattr_count] = getxattr(filename, name, 0, 0, 0, XATTR_NOFOLLOW);
 843                                                 np->xattr_count++;
 844                                         }
 845                                 }
 846                                 /* symlinks can not have ACLs */
 847                                 np->acl = acl_get_link_np(filename, ACL_TYPE_EXTENDED);
 848                                 if (np->acl) {
 849                                         if (acl_get_entry(np->acl, ACL_FIRST_ENTRY, &dummy) == -1) {
 850                                                 acl_free(np->acl);
 851                                                 np->acl = NULL;
 852                                         }
 853                                 }
 854                                 if (xattr_size > 0) {
 855                                         np->mode_suffix = '@';
 856                                 } else if (np->acl) {
 857                                         np->mode_suffix = '+';
 858                                 } else {
 859                                         np->mode_suffix = ' ';
 860                                 }
 861                                 if (IS_DATALESS(sp)) {
 862                                         np->mode_suffix = '%';
 863                                 }
 864                                 if (!f_acl) {
 865                                         acl_free(np->acl);
 866                                         np->acl = NULL;
 867                                 }
 868 #endif // __APPLE__
 869                                 if (S_ISCHR(sp->st_mode) ||
 870                                     S_ISBLK(sp->st_mode))
 871                                         bcfile = 1;
 872
 873                                 if (f_flags) {
 874                                         np->flags = &np->data[ulen + glen + 2];
 875                                         (void)strcpy(np->flags, flags);
 876                                         free(flags);
 877                                 }
 878                                 cur->fts_pointer = np;
 879                         }
 880                 }
 881                 ++entries;
 882         }
 883
 884         if (!entries)
 885                 return;
 886
 887         d.list = list;
 888         d.entries = entries;
 889         d.maxlen = maxlen;
 890         if (needstats) {
 891                 d.bcfile = bcfile;
 892                 d.btotal = btotal;
 893                 (void)snprintf(buf, sizeof(buf), "%qu", (u_int64_t)maxblock);
 894                 d.s_block = strlen(buf);
 895                 d.s_flags = maxflags;
 896                 d.s_lattr = maxlattr;
 897                 d.s_group = maxgroup;
 898 #if _DARWIN_FEATURE_64_BIT_INODE
 899                 (void)snprintf(buf, sizeof(buf), "%llu", maxinode);
 900 #else
 901                 (void)snprintf(buf, sizeof(buf), "%lu", maxinode);
 902 #endif
 903                 d.s_inode = strlen(buf);
 904                 (void)snprintf(buf, sizeof(buf), "%lu", maxnlink);
 905                 d.s_nlink = strlen(buf);
 906                 (void)snprintf(buf, sizeof(buf), "%qu", (u_int64_t)maxsize);
 907                 d.s_size = strlen(buf);
 908                 d.s_user = maxuser;
 909         }
 910         printfcn(&d);
 911         output = 1;
 912
 913         if (f_longform) {
 914                 for (cur = list; cur; cur = cur->fts_link) {
 915                         np = cur->fts_pointer;
 916                         if (np) {
 917                                 if (np->acl) {
 918                                         acl_free(np->acl);
 919                                 }
 920                                 free(np->xattr_names);
 921                                 free(np->xattr_sizes);
 922                                 free(np);
 923                                 cur->fts_pointer = NULL;
 924                         }
 925                 }
 926         }
 927 }
 928
 929 /*
 930  * Ordering for mastercmp:
 931  * If ordering the argv (fts_level = FTS_ROOTLEVEL) return non-directories
 932  * as larger than directories.  Within either group, use the sort function.
 933  * All other levels use the sort function.  Error entries remain unsorted.
 934  */
 935 static int
 936 mastercmp(const FTSENT **a, const FTSENT **b)
 937 {
 938         int a_info, b_info;
 939
 940         a_info = (*a)->fts_info;
 941         if (a_info == FTS_ERR)
 942                 return (0);
 943         b_info = (*b)->fts_info;
 944         if (b_info == FTS_ERR)
 945                 return (0);
 946
 947         if (a_info == FTS_NS || b_info == FTS_NS)
 948                 return (namecmp(*a, *b));
 949
 950         if (a_info != b_info &&
 951             (*a)->fts_level == FTS_ROOTLEVEL && !f_listdir) {
 952                 if (a_info == FTS_D)
 953                         return (1);
 954                 if (b_info == FTS_D)
 955                         return (-1);
 956         }
 957         return (sortfcn(*a, *b));
 958 }
 959
 960 /*
 961  * Makenines() returns (10**n)-1.  This is useful for converting a width
 962  * into a number that wide in decimal.
 963  */
 964 static u_quad_t
 965 makenines(u_quad_t n)
 966 {
 967         u_long i;
 968         u_quad_t reg;
 969
 970         reg = 1;
 971         /* Use a loop instead of pow(), since all values of n are small. */
 972         for (i = 0; i < n; i++)
 973                 reg *= 10;
 974         reg--;
 975
 976         return reg;
 977 }