usr.bin/stat/stat.c

   1 /*
   2  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Andrew Brown.
   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 NetBSD
  19  *      Foundation, Inc. and its contributors.
  20  * 4. Neither the name of The NetBSD Foundation nor the names of its
  21  *    contributors may be used to endorse or promote products derived
  22  *    from this software without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  25  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  26  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  27  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  28  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34  * POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  * $NetBSD: stat.c,v 1.13 2003/07/25 03:21:17 atatat Exp $
  37  * $FreeBSD: src/usr.bin/stat/stat.c,v 1.6 2003/10/06 01:55:17 dougb Exp $
  38  */
  39
  40 #if HAVE_CONFIG_H
  41 #include "config.h"
  42 #else  /* HAVE_CONFIG_H */
  43 #define HAVE_STRUCT_STAT_ST_FLAGS 1
  44 #define HAVE_STRUCT_STAT_ST_GEN 1
  45 #define HAVE_STRUCT_STAT_ST_BIRTHTIME 0
  46 #define HAVE_STRUCT_STAT_ST_MTIMENSEC 1
  47 #define HAVE_DEVNAME 1
  48 #endif /* HAVE_CONFIG_H */
  49
  50 #include <sys/types.h>
  51 #include <sys/stat.h>
  52
  53 #include <ctype.h>
  54 #include <err.h>
  55 #include <grp.h>
  56 #include <limits.h>
  57 #include <pwd.h>
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <time.h>
  62 #include <unistd.h>
  63
  64 #if HAVE_STRUCT_STAT_ST_FLAGS
  65 #define DEF_F "%#Xf "
  66 #define RAW_F "%f "
  67 #define SHELL_F " st_flags=%f"
  68 #else /* HAVE_STRUCT_STAT_ST_FLAGS */
  69 #define DEF_F
  70 #define RAW_F
  71 #define SHELL_F
  72 #endif /* HAVE_STRUCT_STAT_ST_FLAGS */
  73
  74 #if HAVE_STRUCT_STAT_ST_BIRTHTIME
  75 #define DEF_B "\"%SB\" "
  76 #define RAW_B "%B "
  77 #define SHELL_B "st_birthtime=%B "
  78 #else /* HAVE_STRUCT_STAT_ST_BIRTHTIME */
  79 #define DEF_B
  80 #define RAW_B
  81 #define SHELL_B
  82 #endif /* HAVE_STRUCT_STAT_ST_BIRTHTIME */
  83
  84 #if HAVE_STRUCT_STAT_ST_ATIM
  85 #define st_atimespec st_atim
  86 #define st_ctimespec st_ctim
  87 #define st_mtimespec st_mtim
  88 #endif /* HAVE_STRUCT_STAT_ST_ATIM */
  89
  90 #define DEF_FORMAT \
  91         "%d %i %Sp %l %Su %Sg %r %z \"%Sa\" \"%Sm\" \"%Sc\" " DEF_B \
  92         "%k %b " DEF_F "%N"
  93 #define RAW_FORMAT      "%d %i %#p %l %u %g %r %z %a %m %c " RAW_B \
  94         "%k %b " RAW_F "%N"
  95 #define LS_FORMAT       "%Sp %l %Su %Sg %Z %Sm %N%SY"
  96 #define LSF_FORMAT      "%Sp %l %Su %Sg %Z %Sm %N%T%SY"
  97 #define SHELL_FORMAT \
  98         "st_dev=%d st_ino=%i st_mode=%#p st_nlink=%l " \
  99         "st_uid=%u st_gid=%g st_rdev=%r st_size=%z " \
 100         "st_atime=%a st_mtime=%m st_ctime=%c " SHELL_B \
 101         "st_blksize=%k st_blocks=%b" SHELL_F
 102 #define LINUX_FORMAT \
 103         "  File: \"%N\"%n" \
 104         "  Size: %-11z  FileType: %HT%n" \
 105         "  Mode: (%04OLp/%.10Sp)         Uid: (%5u/%8Su)  Gid: (%5g/%8Sg)%n" \
 106         "Device: %Hd,%Ld   Inode: %i    Links: %l%n" \
 107         "Access: %Sa%n" \
 108         "Modify: %Sm%n" \
 109         "Change: %Sc"
 110
 111 #define TIME_FORMAT     "%b %e %T %Y"
 112
 113 #define FLAG_POUND      0x01
 114 #define FLAG_SPACE      0x02
 115 #define FLAG_PLUS       0x04
 116 #define FLAG_ZERO       0x08
 117 #define FLAG_MINUS      0x10
 118
 119 /*
 120  * These format characters must all be unique, except the magic one.
 121  */
 122 #define FMT_MAGIC       '%'
 123 #define FMT_DOT         '.'
 124
 125 #define SIMPLE_NEWLINE  'n'
 126 #define SIMPLE_TAB      't'
 127 #define SIMPLE_PERCENT  '%'
 128 #define SIMPLE_NUMBER   '@'
 129
 130 #define FMT_POUND       '#'
 131 #define FMT_SPACE       ' '
 132 #define FMT_PLUS        '+'
 133 #define FMT_ZERO        '0'
 134 #define FMT_MINUS       '-'
 135
 136 #define FMT_DECIMAL     'D'
 137 #define FMT_OCTAL       'O'
 138 #define FMT_UNSIGNED    'U'
 139 #define FMT_HEX         'X'
 140 #define FMT_FLOAT       'F'
 141 #define FMT_STRING      'S'
 142
 143 #define FMTF_DECIMAL    0x01
 144 #define FMTF_OCTAL      0x02
 145 #define FMTF_UNSIGNED   0x04
 146 #define FMTF_HEX        0x08
 147 #define FMTF_FLOAT      0x10
 148 #define FMTF_STRING     0x20
 149
 150 #define HIGH_PIECE      'H'
 151 #define MIDDLE_PIECE    'M'
 152 #define LOW_PIECE       'L'
 153
 154 #define SHOW_st_dev     'd'
 155 #define SHOW_st_ino     'i'
 156 #define SHOW_st_mode    'p'
 157 #define SHOW_st_nlink   'l'
 158 #define SHOW_st_uid     'u'
 159 #define SHOW_st_gid     'g'
 160 #define SHOW_st_rdev    'r'
 161 #define SHOW_st_atime   'a'
 162 #define SHOW_st_mtime   'm'
 163 #define SHOW_st_ctime   'c'
 164 #define SHOW_st_btime   'B'
 165 #define SHOW_st_size    'z'
 166 #define SHOW_st_blocks  'b'
 167 #define SHOW_st_blksize 'k'
 168 #define SHOW_st_flags   'f'
 169 #define SHOW_st_gen     'v'
 170 #define SHOW_symlink    'Y'
 171 #define SHOW_filetype   'T'
 172 #define SHOW_filename   'N'
 173 #define SHOW_sizerdev   'Z'
 174
 175 void    usage(const char *);
 176 void    output(const struct stat *, const char *,
 177             const char *, int, int, int);
 178 int     format1(const struct stat *,    /* stat info */
 179             const char *,               /* the file name */
 180             const char *, int,          /* the format string itself */
 181             char *, size_t,             /* a place to put the output */
 182             int, int, int, int,         /* the parsed format */
 183             int, int);
 184
 185 char *timefmt;
 186 int linkfail;
 187
 188 #define addchar(s, c, nl) \
 189         do { \
 190                 (void)fputc((c), (s)); \
 191                 (*nl) = ((c) == '\n'); \
 192         } while (0/*CONSTCOND*/)
 193
 194 int
 195 main(int argc, char *argv[])
 196 {
 197         struct stat st;
 198         int ch, rc, errs, am_readlink;
 199         int lsF, fmtchar, usestat, fn, nonl, quiet;
 200         char *statfmt, *options, *synopsis;
 201
 202         am_readlink = 0;
 203         lsF = 0;
 204         fmtchar = '\0';
 205         usestat = 0;
 206         nonl = 0;
 207         quiet = 0;
 208         linkfail = 0;
 209         statfmt = NULL;
 210         timefmt = NULL;
 211
 212         if (strcmp(getprogname(), "readlink") == 0) {
 213                 am_readlink = 1;
 214                 options = "n";
 215                 synopsis = "[-n] [file ...]";
 216                 statfmt = "%Y";
 217                 fmtchar = 'f';
 218                 quiet = 1;
 219         } else {
 220                 options = "f:FlLnqrst:x";
 221                 synopsis = "[-FlLnqrsx] [-f format] [-t timefmt] [file ...]";
 222         }
 223
 224         while ((ch = getopt(argc, argv, options)) != -1)
 225                 switch (ch) {
 226                 case 'F':
 227                         lsF = 1;
 228                         break;
 229                 case 'L':
 230                         usestat = 1;
 231                         break;
 232                 case 'n':
 233                         nonl = 1;
 234                         break;
 235                 case 'q':
 236                         quiet = 1;
 237                         break;
 238                 case 'f':
 239                         statfmt = optarg;
 240                         /* FALLTHROUGH */
 241                 case 'l':
 242                 case 'r':
 243                 case 's':
 244                 case 'x':
 245                         if (fmtchar != 0)
 246                                 errx(1, "can't use format '%c' with '%c'",
 247                                     fmtchar, ch);
 248                         fmtchar = ch;
 249                         break;
 250                 case 't':
 251                         timefmt = optarg;
 252                         break;
 253                 default:
 254                         usage(synopsis);
 255                 }
 256
 257         argc -= optind;
 258         argv += optind;
 259         fn = 1;
 260
 261         if (fmtchar == '\0') {
 262                 if (lsF)
 263                         fmtchar = 'l';
 264                 else {
 265                         fmtchar = 'f';
 266                         statfmt = DEF_FORMAT;
 267                 }
 268         }
 269
 270         if (lsF && fmtchar != 'l')
 271                 errx(1, "can't use format '%c' with -F", fmtchar);
 272
 273         switch (fmtchar) {
 274         case 'f':
 275                 /* statfmt already set */
 276                 break;
 277         case 'l':
 278                 statfmt = lsF ? LSF_FORMAT : LS_FORMAT;
 279                 break;
 280         case 'r':
 281                 statfmt = RAW_FORMAT;
 282                 break;
 283         case 's':
 284                 statfmt = SHELL_FORMAT;
 285                 break;
 286         case 'x':
 287                 statfmt = LINUX_FORMAT;
 288                 if (timefmt == NULL)
 289                         timefmt = "%c";
 290                 break;
 291         default:
 292                 usage(synopsis);
 293                 /*NOTREACHED*/
 294         }
 295
 296         if (timefmt == NULL)
 297                 timefmt = TIME_FORMAT;
 298
 299         errs = 0;
 300         do {
 301                 if (argc == 0)
 302                         rc = fstat(STDIN_FILENO, &st);
 303                 else if (usestat)
 304                         rc = stat(argv[0], &st);
 305                 else
 306                         rc = lstat(argv[0], &st);
 307
 308                 if (rc == -1) {
 309                         errs = 1;
 310                         linkfail = 1;
 311                         if (!quiet)
 312                                 warn("%s: stat",
 313                                     argc == 0 ? "(stdin)" : argv[0]);
 314                 }
 315                 else
 316                         output(&st, argv[0], statfmt, fn, nonl, quiet);
 317
 318                 argv++;
 319                 argc--;
 320                 fn++;
 321         } while (argc > 0);
 322
 323         return (am_readlink ? linkfail : errs);
 324 }
 325
 326 void
 327 usage(const char *synopsis)
 328 {
 329
 330         (void)fprintf(stderr, "usage: %s %s\n", getprogname(), synopsis);
 331         exit(1);
 332 }
 333
 334 /*
 335  * Parses a format string.
 336  */
 337 void
 338 output(const struct stat *st, const char *file,
 339     const char *statfmt, int fn, int nonl, int quiet)
 340 {
 341         int flags, size, prec, ofmt, hilo, what;
 342         char buf[PATH_MAX];
 343         const char *subfmt;
 344         int nl, t, i;
 345
 346         nl = 1;
 347         while (*statfmt != '\0') {
 348
 349                 /*
 350                  * Non-format characters go straight out.
 351                  */
 352                 if (*statfmt != FMT_MAGIC) {
 353                         addchar(stdout, *statfmt, &nl);
 354                         statfmt++;
 355                         continue;
 356                 }
 357
 358                 /*
 359                  * The current format "substring" starts here,
 360                  * and then we skip the magic.
 361                  */
 362                 subfmt = statfmt;
 363                 statfmt++;
 364
 365                 /*
 366                  * Some simple one-character "formats".
 367                  */
 368                 switch (*statfmt) {
 369                 case SIMPLE_NEWLINE:
 370                         addchar(stdout, '\n', &nl);
 371                         statfmt++;
 372                         continue;
 373                 case SIMPLE_TAB:
 374                         addchar(stdout, '\t', &nl);
 375                         statfmt++;
 376                         continue;
 377                 case SIMPLE_PERCENT:
 378                         addchar(stdout, '%', &nl);
 379                         statfmt++;
 380                         continue;
 381                 case SIMPLE_NUMBER: {
 382                         char num[12], *p;
 383
 384                         snprintf(num, sizeof(num), "%d", fn);
 385                         for (p = &num[0]; *p; p++)
 386                                 addchar(stdout, *p, &nl);
 387                         statfmt++;
 388                         continue;
 389                 }
 390                 }
 391
 392                 /*
 393                  * This must be an actual format string.  Format strings are
 394                  * similar to printf(3) formats up to a point, and are of
 395                  * the form:
 396                  *
 397                  *      %       required start of format
 398                  *      [-# +0] opt. format characters
 399                  *      size    opt. field width
 400                  *      .       opt. decimal separator, followed by
 401                  *      prec    opt. precision
 402                  *      fmt     opt. output specifier (string, numeric, etc.)
 403                  *      sub     opt. sub field specifier (high, middle, low)
 404                  *      datum   required field specifier (size, mode, etc)
 405                  *
 406                  * Only the % and the datum selector are required.  All data
 407                  * have reasonable default output forms.  The "sub" specifier
 408                  * only applies to certain data (mode, dev, rdev, filetype).
 409                  * The symlink output defaults to STRING, yet will only emit
 410                  * the leading " -> " if STRING is explicitly specified.  The
 411                  * sizerdev datum will generate rdev output for character or
 412                  * block devices, and size output for all others.
 413                  */
 414                 flags = 0;
 415                 do {
 416                         if      (*statfmt == FMT_POUND)
 417                                 flags |= FLAG_POUND;
 418                         else if (*statfmt == FMT_SPACE)
 419                                 flags |= FLAG_SPACE;
 420                         else if (*statfmt == FMT_PLUS)
 421                                 flags |= FLAG_PLUS;
 422                         else if (*statfmt == FMT_ZERO)
 423                                 flags |= FLAG_ZERO;
 424                         else if (*statfmt == FMT_MINUS)
 425                                 flags |= FLAG_MINUS;
 426                         else
 427                                 break;
 428                         statfmt++;
 429                 } while (1/*CONSTCOND*/);
 430
 431                 size = -1;
 432                 if (isdigit((unsigned)*statfmt)) {
 433                         size = 0;
 434                         while (isdigit((unsigned)*statfmt)) {
 435                                 size = (size * 10) + (*statfmt - '0');
 436                                 statfmt++;
 437                                 if (size < 0)
 438                                         goto badfmt;
 439                         }
 440                 }
 441
 442                 prec = -1;
 443                 if (*statfmt == FMT_DOT) {
 444                         statfmt++;
 445
 446                         prec = 0;
 447                         while (isdigit((unsigned)*statfmt)) {
 448                                 prec = (prec * 10) + (*statfmt - '0');
 449                                 statfmt++;
 450                                 if (prec < 0)
 451                                         goto badfmt;
 452                         }
 453                 }
 454
 455 #define fmtcase(x, y)           case (y): (x) = (y); statfmt++; break
 456 #define fmtcasef(x, y, z)       case (y): (x) = (z); statfmt++; break
 457                 switch (*statfmt) {
 458                         fmtcasef(ofmt, FMT_DECIMAL,     FMTF_DECIMAL);
 459                         fmtcasef(ofmt, FMT_OCTAL,       FMTF_OCTAL);
 460                         fmtcasef(ofmt, FMT_UNSIGNED,    FMTF_UNSIGNED);
 461                         fmtcasef(ofmt, FMT_HEX,         FMTF_HEX);
 462                         fmtcasef(ofmt, FMT_FLOAT,       FMTF_FLOAT);
 463                         fmtcasef(ofmt, FMT_STRING,      FMTF_STRING);
 464                 default:
 465                         ofmt = 0;
 466                         break;
 467                 }
 468
 469                 switch (*statfmt) {
 470                         fmtcase(hilo, HIGH_PIECE);
 471                         fmtcase(hilo, MIDDLE_PIECE);
 472                         fmtcase(hilo, LOW_PIECE);
 473                 default:
 474                         hilo = 0;
 475                         break;
 476                 }
 477
 478                 switch (*statfmt) {
 479                         fmtcase(what, SHOW_st_dev);
 480                         fmtcase(what, SHOW_st_ino);
 481                         fmtcase(what, SHOW_st_mode);
 482                         fmtcase(what, SHOW_st_nlink);
 483                         fmtcase(what, SHOW_st_uid);
 484                         fmtcase(what, SHOW_st_gid);
 485                         fmtcase(what, SHOW_st_rdev);
 486                         fmtcase(what, SHOW_st_atime);
 487                         fmtcase(what, SHOW_st_mtime);
 488                         fmtcase(what, SHOW_st_ctime);
 489                         fmtcase(what, SHOW_st_btime);
 490                         fmtcase(what, SHOW_st_size);
 491                         fmtcase(what, SHOW_st_blocks);
 492                         fmtcase(what, SHOW_st_blksize);
 493                         fmtcase(what, SHOW_st_flags);
 494                         fmtcase(what, SHOW_st_gen);
 495                         fmtcase(what, SHOW_symlink);
 496                         fmtcase(what, SHOW_filetype);
 497                         fmtcase(what, SHOW_filename);
 498                         fmtcase(what, SHOW_sizerdev);
 499                 default:
 500                         goto badfmt;
 501                 }
 502 #undef fmtcasef
 503 #undef fmtcase
 504
 505                 t = format1(st,
 506                      file,
 507                      subfmt, statfmt - subfmt,
 508                      buf, sizeof(buf),
 509                      flags, size, prec, ofmt, hilo, what);
 510
 511                 for (i = 0; i < t && i < sizeof(buf); i++)
 512                         addchar(stdout, buf[i], &nl);
 513
 514                 continue;
 515
 516         badfmt:
 517                 errx(1, "%.*s: bad format",
 518                     (int)(statfmt - subfmt + 1), subfmt);
 519         }
 520
 521         if (!nl && !nonl)
 522                 (void)fputc('\n', stdout);
 523         (void)fflush(stdout);
 524 }
 525
 526 /*
 527  * Arranges output according to a single parsed format substring.
 528  */
 529 int
 530 format1(const struct stat *st,
 531     const char *file,
 532     const char *fmt, int flen,
 533     char *buf, size_t blen,
 534     int flags, int size, int prec, int ofmt,
 535     int hilo, int what)
 536 {
 537         u_int64_t data;
 538         char *sdata, lfmt[24], tmp[20];
 539         char smode[12], sid[12], path[PATH_MAX + 4];
 540         struct passwd *pw;
 541         struct group *gr;
 542         const struct timespec *tsp;
 543         struct timespec ts;
 544         struct tm *tm;
 545         int l, small, formats;
 546
 547         tsp = NULL;
 548         formats = 0;
 549         small = 0;
 550
 551         /*
 552          * First, pick out the data and tweak it based on hilo or
 553          * specified output format (symlink output only).
 554          */
 555         switch (what) {
 556         case SHOW_st_dev:
 557         case SHOW_st_rdev:
 558                 small = (sizeof(st->st_dev) == 4);
 559                 data = (what == SHOW_st_dev) ? st->st_dev : st->st_rdev;
 560 #if HAVE_DEVNAME
 561                 sdata = (what == SHOW_st_dev) ?
 562                     devname(st->st_dev, S_IFBLK) :
 563                     devname(st->st_rdev,
 564                     S_ISCHR(st->st_mode) ? S_IFCHR :
 565                     S_ISBLK(st->st_mode) ? S_IFBLK :
 566                     0U);
 567                 if (sdata == NULL)
 568                         sdata = "???";
 569 #endif /* HAVE_DEVNAME */
 570                 if (hilo == HIGH_PIECE) {
 571                         data = major(data);
 572                         hilo = 0;
 573                 }
 574                 else if (hilo == LOW_PIECE) {
 575                         data = minor((unsigned)data);
 576                         hilo = 0;
 577                 }
 578                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
 579 #if HAVE_DEVNAME
 580                     FMTF_STRING;
 581 #else /* HAVE_DEVNAME */
 582                     0;
 583 #endif /* HAVE_DEVNAME */
 584                 if (ofmt == 0)
 585                         ofmt = FMTF_UNSIGNED;
 586                 break;
 587         case SHOW_st_ino:
 588                 small = (sizeof(st->st_ino) == 4);
 589                 data = st->st_ino;
 590                 sdata = NULL;
 591                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 592                 if (ofmt == 0)
 593                         ofmt = FMTF_UNSIGNED;
 594                 break;
 595         case SHOW_st_mode:
 596                 small = (sizeof(st->st_mode) == 4);
 597                 data = st->st_mode;
 598                 strmode(st->st_mode, smode);
 599                 sdata = smode;
 600                 l = strlen(sdata);
 601                 if (sdata[l - 1] == ' ')
 602                         sdata[--l] = '\0';
 603                 if (hilo == HIGH_PIECE) {
 604                         data >>= 12;
 605                         sdata += 1;
 606                         sdata[3] = '\0';
 607                         hilo = 0;
 608                 }
 609                 else if (hilo == MIDDLE_PIECE) {
 610                         data = (data >> 9) & 07;
 611                         sdata += 4;
 612                         sdata[3] = '\0';
 613                         hilo = 0;
 614                 }
 615                 else if (hilo == LOW_PIECE) {
 616                         data &= 0777;
 617                         sdata += 7;
 618                         sdata[3] = '\0';
 619                         hilo = 0;
 620                 }
 621                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
 622                     FMTF_STRING;
 623                 if (ofmt == 0)
 624                         ofmt = FMTF_OCTAL;
 625                 break;
 626         case SHOW_st_nlink:
 627                 small = (sizeof(st->st_dev) == 4);
 628                 data = st->st_nlink;
 629                 sdata = NULL;
 630                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 631                 if (ofmt == 0)
 632                         ofmt = FMTF_UNSIGNED;
 633                 break;
 634         case SHOW_st_uid:
 635                 small = (sizeof(st->st_uid) == 4);
 636                 data = st->st_uid;
 637                 if ((pw = getpwuid(st->st_uid)) != NULL)
 638                         sdata = pw->pw_name;
 639                 else {
 640                         snprintf(sid, sizeof(sid), "(%ld)", (long)st->st_uid);
 641                         sdata = sid;
 642                 }
 643                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
 644                     FMTF_STRING;
 645                 if (ofmt == 0)
 646                         ofmt = FMTF_UNSIGNED;
 647                 break;
 648         case SHOW_st_gid:
 649                 small = (sizeof(st->st_gid) == 4);
 650                 data = st->st_gid;
 651                 if ((gr = getgrgid(st->st_gid)) != NULL)
 652                         sdata = gr->gr_name;
 653                 else {
 654                         snprintf(sid, sizeof(sid), "(%ld)", (long)st->st_gid);
 655                         sdata = sid;
 656                 }
 657                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
 658                     FMTF_STRING;
 659                 if (ofmt == 0)
 660                         ofmt = FMTF_UNSIGNED;
 661                 break;
 662         case SHOW_st_atime:
 663                 tsp = &st->st_atimespec;
 664                 /* FALLTHROUGH */
 665         case SHOW_st_mtime:
 666                 if (tsp == NULL)
 667                         tsp = &st->st_mtimespec;
 668                 /* FALLTHROUGH */
 669         case SHOW_st_ctime:
 670                 if (tsp == NULL)
 671                         tsp = &st->st_ctimespec;
 672                 /* FALLTHROUGH */
 673 #if HAVE_STRUCT_STAT_ST_BIRTHTIME
 674         case SHOW_st_btime:
 675                 if (tsp == NULL)
 676                         tsp = &st->st_birthtimespec;
 677 #endif /* HAVE_STRUCT_STAT_ST_BIRTHTIME */
 678                 ts = *tsp;              /* copy so we can muck with it */
 679                 small = (sizeof(ts.tv_sec) == 4);
 680                 data = ts.tv_sec;
 681                 small = 1;
 682                 tm = localtime(&ts.tv_sec);
 683                 strftime(path, sizeof(path), timefmt, tm);
 684                 sdata = path;
 685                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX |
 686                     FMTF_FLOAT | FMTF_STRING;
 687                 if (ofmt == 0)
 688                         ofmt = FMTF_DECIMAL;
 689                 break;
 690         case SHOW_st_size:
 691                 small = (sizeof(st->st_size) == 4);
 692                 data = st->st_size;
 693                 sdata = NULL;
 694                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 695                 if (ofmt == 0)
 696                         ofmt = FMTF_UNSIGNED;
 697                 break;
 698         case SHOW_st_blocks:
 699                 small = (sizeof(st->st_blocks) == 4);
 700                 data = st->st_blocks;
 701                 sdata = NULL;
 702                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 703                 if (ofmt == 0)
 704                         ofmt = FMTF_UNSIGNED;
 705                 break;
 706         case SHOW_st_blksize:
 707                 small = (sizeof(st->st_blksize) == 4);
 708                 data = st->st_blksize;
 709                 sdata = NULL;
 710                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 711                 if (ofmt == 0)
 712                         ofmt = FMTF_UNSIGNED;
 713                 break;
 714 #if HAVE_STRUCT_STAT_ST_FLAGS
 715         case SHOW_st_flags:
 716                 small = (sizeof(st->st_flags) == 4);
 717                 data = st->st_flags;
 718                 sdata = NULL;
 719                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 720                 if (ofmt == 0)
 721                         ofmt = FMTF_UNSIGNED;
 722                 break;
 723 #endif /* HAVE_STRUCT_STAT_ST_FLAGS */
 724 #if HAVE_STRUCT_STAT_ST_GEN
 725         case SHOW_st_gen:
 726                 small = (sizeof(st->st_gen) == 4);
 727                 data = st->st_gen;
 728                 sdata = NULL;
 729                 formats = FMTF_DECIMAL | FMTF_OCTAL | FMTF_UNSIGNED | FMTF_HEX;
 730                 if (ofmt == 0)
 731                         ofmt = FMTF_UNSIGNED;
 732                 break;
 733 #endif /* HAVE_STRUCT_STAT_ST_GEN */
 734         case SHOW_symlink:
 735                 small = 0;
 736                 data = 0;
 737                 if (S_ISLNK(st->st_mode)) {
 738                         snprintf(path, sizeof(path), " -> ");
 739                         l = readlink(file, path + 4, sizeof(path) - 4 - 1);
 740                         if (l == -1) {
 741                                 linkfail = 1;
 742                                 l = 0;
 743                                 path[0] = '\0';
 744                         }
 745                         path[l + 4] = '\0';
 746                         sdata = path + (ofmt == FMTF_STRING ? 0 : 4);
 747                 }
 748                 else {
 749                         linkfail = 1;
 750                         sdata = "";
 751                 }
 752                 formats = FMTF_STRING;
 753                 if (ofmt == 0)
 754                         ofmt = FMTF_STRING;
 755                 break;
 756         case SHOW_filetype:
 757                 small = 0;
 758                 data = 0;
 759                 sdata = smode;
 760                 sdata[0] = '\0';
 761                 if (hilo == 0 || hilo == LOW_PIECE) {
 762                         switch (st->st_mode & S_IFMT) {
 763                         case S_IFIFO:   (void)strcat(sdata, "|");       break;
 764                         case S_IFDIR:   (void)strcat(sdata, "/");       break;
 765                         case S_IFREG:
 766                                 if (st->st_mode &
 767                                     (S_IXUSR | S_IXGRP | S_IXOTH))
 768                                         (void)strcat(sdata, "*");
 769                                 break;
 770                         case S_IFLNK:   (void)strcat(sdata, "@");       break;
 771                         case S_IFSOCK:  (void)strcat(sdata, "=");       break;
 772 #ifdef S_IFWHT
 773                         case S_IFWHT:   (void)strcat(sdata, "%");       break;
 774 #endif /* S_IFWHT */
 775 #ifdef S_IFDOOR
 776                         case S_IFDOOR:  (void)strcat(sdata, ">");       break;
 777 #endif /* S_IFDOOR */
 778                         }
 779                         hilo = 0;
 780                 }
 781                 else if (hilo == HIGH_PIECE) {
 782                         switch (st->st_mode & S_IFMT) {
 783                         case S_IFIFO:   sdata = "Fifo File";            break;
 784                         case S_IFCHR:   sdata = "Character Device";     break;
 785                         case S_IFDIR:   sdata = "Directory";            break;
 786                         case S_IFBLK:   sdata = "Block Device";         break;
 787                         case S_IFREG:   sdata = "Regular File";         break;
 788                         case S_IFLNK:   sdata = "Symbolic Link";        break;
 789                         case S_IFSOCK:  sdata = "Socket";               break;
 790 #ifdef S_IFWHT
 791                         case S_IFWHT:   sdata = "Whiteout File";        break;
 792 #endif /* S_IFWHT */
 793 #ifdef S_IFDOOR
 794                         case S_IFDOOR:  sdata = "Door";                 break;
 795 #endif /* S_IFDOOR */
 796                         default:        sdata = "???";                  break;
 797                         }
 798                         hilo = 0;
 799                 }
 800                 formats = FMTF_STRING;
 801                 if (ofmt == 0)
 802                         ofmt = FMTF_STRING;
 803                 break;
 804         case SHOW_filename:
 805                 small = 0;
 806                 data = 0;
 807                 if (file == NULL)
 808                         (void)strncpy(path, "(stdin)", sizeof(path));
 809                 else
 810                         (void)strncpy(path, file, sizeof(path));
 811                 sdata = path;
 812                 formats = FMTF_STRING;
 813                 if (ofmt == 0)
 814                         ofmt = FMTF_STRING;
 815                 break;
 816         case SHOW_sizerdev:
 817                 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) {
 818                         char majdev[20], mindev[20];
 819                         int l1, l2;
 820
 821                         l1 = format1(st,
 822                             file,
 823                             fmt, flen,
 824                             majdev, sizeof(majdev),
 825                             flags, size, prec,
 826                             ofmt, HIGH_PIECE, SHOW_st_rdev);
 827                         l2 = format1(st,
 828                             file,
 829                             fmt, flen,
 830                             mindev, sizeof(mindev),
 831                             flags, size, prec,
 832                             ofmt, LOW_PIECE, SHOW_st_rdev);
 833                         return (snprintf(buf, blen, "%.*s,%.*s",
 834                             l1, majdev, l2, mindev));
 835                 }
 836                 else {
 837                         return (format1(st,
 838                             file,
 839                             fmt, flen,
 840                             buf, blen,
 841                             flags, size, prec,
 842                             ofmt, 0, SHOW_st_size));
 843                 }
 844                 /*NOTREACHED*/
 845         default:
 846                 errx(1, "%.*s: bad format", (int)flen, fmt);
 847         }
 848
 849         /*
 850          * If a subdatum was specified but not supported, or an output
 851          * format was selected that is not supported, that's an error.
 852          */
 853         if (hilo != 0 || (ofmt & formats) == 0)
 854                 errx(1, "%.*s: bad format", (int)flen, fmt);
 855
 856         /*
 857          * Assemble the format string for passing to printf(3).
 858          */
 859         lfmt[0] = '\0';
 860         (void)strcat(lfmt, "%");
 861         if (flags & FLAG_POUND)
 862                 (void)strcat(lfmt, "#");
 863         if (flags & FLAG_SPACE)
 864                 (void)strcat(lfmt, " ");
 865         if (flags & FLAG_PLUS)
 866                 (void)strcat(lfmt, "+");
 867         if (flags & FLAG_MINUS)
 868                 (void)strcat(lfmt, "-");
 869         if (flags & FLAG_ZERO)
 870                 (void)strcat(lfmt, "0");
 871
 872         /*
 873          * Only the timespecs support the FLOAT output format, and that
 874          * requires work that differs from the other formats.
 875          */
 876         if (ofmt == FMTF_FLOAT) {
 877                 /*
 878                  * Nothing after the decimal point, so just print seconds.
 879                  */
 880                 if (prec == 0) {
 881                         if (size != -1) {
 882                                 (void)snprintf(tmp, sizeof(tmp), "%d", size);
 883                                 (void)strcat(lfmt, tmp);
 884                         }
 885                         (void)strcat(lfmt, "d");
 886                         return (snprintf(buf, blen, lfmt, ts.tv_sec));
 887                 }
 888
 889                 /*
 890                  * Unspecified precision gets all the precision we have:
 891                  * 9 digits.
 892                  */
 893                 if (prec == -1)
 894                         prec = 9;
 895
 896                 /*
 897                  * Adjust the size for the decimal point and the digits
 898                  * that will follow.
 899                  */
 900                 size -= prec + 1;
 901
 902                 /*
 903                  * Any leftover size that's legitimate will be used.
 904                  */
 905                 if (size > 0) {
 906                         (void)snprintf(tmp, sizeof(tmp), "%d", size);
 907                         (void)strcat(lfmt, tmp);
 908                 }
 909                 (void)strcat(lfmt, "d");
 910
 911                 /*
 912                  * The stuff after the decimal point always needs zero
 913                  * filling.
 914                  */
 915                 (void)strcat(lfmt, ".%0");
 916
 917                 /*
 918                  * We can "print" at most nine digits of precision.  The
 919                  * rest we will pad on at the end.
 920                  */
 921                 (void)snprintf(tmp, sizeof(tmp), "%dd", prec > 9 ? 9 : prec);
 922                 (void)strcat(lfmt, tmp);
 923
 924                 /*
 925                  * For precision of less that nine digits, trim off the
 926                  * less significant figures.
 927                  */
 928                 for (; prec < 9; prec++)
 929                         ts.tv_nsec /= 10;
 930
 931                 /*
 932                  * Use the format, and then tack on any zeroes that
 933                  * might be required to make up the requested precision.
 934                  */
 935                 l = snprintf(buf, blen, lfmt, ts.tv_sec, ts.tv_nsec);
 936                 for (; prec > 9 && l < blen; prec--, l++)
 937                         (void)strcat(buf, "0");
 938                 return (l);
 939         }
 940
 941         /*
 942          * Add on size and precision, if specified, to the format.
 943          */
 944         if (size != -1) {
 945                 (void)snprintf(tmp, sizeof(tmp), "%d", size);
 946                 (void)strcat(lfmt, tmp);
 947         }
 948         if (prec != -1) {
 949                 (void)snprintf(tmp, sizeof(tmp), ".%d", prec);
 950                 (void)strcat(lfmt, tmp);
 951         }
 952
 953         /*
 954          * String output uses the temporary sdata.
 955          */
 956         if (ofmt == FMTF_STRING) {
 957                 if (sdata == NULL)
 958                         errx(1, "%.*s: bad format", (int)flen, fmt);
 959                 (void)strcat(lfmt, "s");
 960                 return (snprintf(buf, blen, lfmt, sdata));
 961         }
 962
 963         /*
 964          * Ensure that sign extension does not cause bad looking output
 965          * for some forms.
 966          */
 967         if (small && ofmt != FMTF_DECIMAL)
 968                 data = (u_int32_t)data;
 969
 970         /*
 971          * The four "numeric" output forms.
 972          */
 973         (void)strcat(lfmt, "ll");
 974         switch (ofmt) {
 975         case FMTF_DECIMAL:      (void)strcat(lfmt, "d");        break;
 976         case FMTF_OCTAL:                (void)strcat(lfmt, "o");        break;
 977         case FMTF_UNSIGNED:     (void)strcat(lfmt, "u");        break;
 978         case FMTF_HEX:          (void)strcat(lfmt, "x");        break;
 979         }
 980
 981         return (snprintf(buf, blen, lfmt, data));
 982 }