src/stat.c

   1 /* stat.c -- display file or file system status
   2    Copyright (C) 2001-2008 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17    Written by Michael Meskes.  */
  18
  19 #include <config.h>
  20
  21 /* Keep this conditional in sync with the similar conditional in
  22    ../m4/stat-prog.m4.  */
  23 #if (STAT_STATVFS \
  24      && (HAVE_STRUCT_STATVFS_F_BASETYPE || HAVE_STRUCT_STATVFS_F_FSTYPENAME \
  25          || (! HAVE_STRUCT_STATFS_F_FSTYPENAME && HAVE_STRUCT_STATVFS_F_TYPE)))
  26 # define USE_STATVFS 1
  27 #else
  28 # define USE_STATVFS 0
  29 #endif
  30
  31 #include <stddef.h>
  32 #include <stdio.h>
  33 #include <sys/types.h>
  34 #include <pwd.h>
  35 #include <grp.h>
  36 #if USE_STATVFS
  37 # include <sys/statvfs.h>
  38 #elif HAVE_SYS_VFS_H
  39 # include <sys/vfs.h>
  40 #elif HAVE_SYS_MOUNT_H && HAVE_SYS_PARAM_H
  41 /* NOTE: freebsd5.0 needs sys/param.h and sys/mount.h for statfs.
  42    It does have statvfs.h, but shouldn't use it, since it doesn't
  43    HAVE_STRUCT_STATVFS_F_BASETYPE.  So find a clean way to fix it.  */
  44 /* NetBSD 1.5.2 needs these, for the declaration of struct statfs. */
  45 # include <sys/param.h>
  46 # include <sys/mount.h>
  47 # if HAVE_NETINET_IN_H && HAVE_NFS_NFS_CLNT_H && HAVE_NFS_VFS_H
  48 /* Ultrix 4.4 needs these for the declaration of struct statfs.  */
  49 #  include <netinet/in.h>
  50 #  include <nfs/nfs_clnt.h>
  51 #  include <nfs/vfs.h>
  52 # endif
  53 #elif HAVE_OS_H /* BeOS */
  54 # include <fs_info.h>
  55 #endif
  56 #include <selinux/selinux.h>
  57
  58 #include "system.h"
  59
  60 #include "error.h"
  61 #include "filemode.h"
  62 #include "file-type.h"
  63 #include "fs.h"
  64 #include "getopt.h"
  65 #include "quote.h"
  66 #include "quotearg.h"
  67 #include "stat-time.h"
  68 #include "strftime.h"
  69 #include "areadlink.h"
  70
  71 #define alignof(type) offsetof (struct { char c; type x; }, x)
  72
  73 #if USE_STATVFS
  74 # define STRUCT_STATVFS struct statvfs
  75 # define STRUCT_STATXFS_F_FSID_IS_INTEGER STRUCT_STATVFS_F_FSID_IS_INTEGER
  76 # define HAVE_STRUCT_STATXFS_F_TYPE HAVE_STRUCT_STATVFS_F_TYPE
  77 # if HAVE_STRUCT_STATVFS_F_NAMEMAX
  78 #  define SB_F_NAMEMAX(S) ((S)->f_namemax)
  79 # endif
  80 # define STATFS statvfs
  81 # define STATFS_FRSIZE(S) ((S)->f_frsize)
  82 #else
  83 # define HAVE_STRUCT_STATXFS_F_TYPE HAVE_STRUCT_STATFS_F_TYPE
  84 # if HAVE_STRUCT_STATFS_F_NAMELEN
  85 #  define SB_F_NAMEMAX(S) ((S)->f_namelen)
  86 # endif
  87 # define STATFS statfs
  88 # if HAVE_OS_H /* BeOS */
  89 /* BeOS has a statvfs function, but it does not return sensible values
  90    for f_files, f_ffree and f_favail, and lacks f_type, f_basetype and
  91    f_fstypename.  Use 'struct fs_info' instead.  */
  92 static int
  93 statfs (char const *filename, struct fs_info *buf)
  94 {
  95   dev_t device = dev_for_path (filename);
  96   if (device < 0)
  97     {
  98       errno = (device == B_ENTRY_NOT_FOUND ? ENOENT
  99                : device == B_BAD_VALUE ? EINVAL
 100                : device == B_NAME_TOO_LONG ? ENAMETOOLONG
 101                : device == B_NO_MEMORY ? ENOMEM
 102                : device == B_FILE_ERROR ? EIO
 103                : 0);
 104       return -1;
 105     }
 106   /* If successful, buf->dev will be == device.  */
 107   return fs_stat_dev (device, buf);
 108 }
 109 #  define f_fsid dev
 110 #  define f_blocks total_blocks
 111 #  define f_bfree free_blocks
 112 #  define f_bavail free_blocks
 113 #  define f_bsize io_size
 114 #  define f_files total_nodes
 115 #  define f_ffree free_nodes
 116 #  define STRUCT_STATVFS struct fs_info
 117 #  define STRUCT_STATXFS_F_FSID_IS_INTEGER true
 118 #  define STATFS_FRSIZE(S) ((S)->block_size)
 119 # else
 120 #  define STRUCT_STATVFS struct statfs
 121 #  define STRUCT_STATXFS_F_FSID_IS_INTEGER STRUCT_STATFS_F_FSID_IS_INTEGER
 122 #  define STATFS_FRSIZE(S) 0
 123 # endif
 124 #endif
 125
 126 #ifdef SB_F_NAMEMAX
 127 # define OUT_NAMEMAX out_uint
 128 #else
 129 /* NetBSD 1.5.2 has neither f_namemax nor f_namelen.  */
 130 # define SB_F_NAMEMAX(S) "*"
 131 # define OUT_NAMEMAX out_string
 132 #endif
 133
 134 #if HAVE_STRUCT_STATVFS_F_BASETYPE
 135 # define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME f_basetype
 136 #else
 137 # if HAVE_STRUCT_STATVFS_F_FSTYPENAME || HAVE_STRUCT_STATFS_F_FSTYPENAME
 138 #  define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME f_fstypename
 139 # elif HAVE_OS_H /* BeOS */
 140 #  define STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME fsh_name
 141 # endif
 142 #endif
 143
 144 /* FIXME: these are used by printf.c, too */
 145 #define isodigit(c) ('0' <= (c) && (c) <= '7')
 146 #define octtobin(c) ((c) - '0')
 147 #define hextobin(c) ((c) >= 'a' && (c) <= 'f' ? (c) - 'a' + 10 : \
 148                      (c) >= 'A' && (c) <= 'F' ? (c) - 'A' + 10 : (c) - '0')
 149
 150 #define PROGRAM_NAME "stat"
 151
 152 #define AUTHORS proper_name ("Michael Meskes")
 153
 154 enum
 155 {
 156   PRINTF_OPTION = CHAR_MAX + 1
 157 };
 158
 159 static struct option const long_options[] =
 160 {
 161   {"context", no_argument, 0, 'Z'},
 162   {"dereference", no_argument, NULL, 'L'},
 163   {"file-system", no_argument, NULL, 'f'},
 164
 165   /* obsolete and undocumented alias: FIXME: remove in 2009 */
 166   {"filesystem", no_argument, NULL, 'f'},
 167
 168   {"format", required_argument, NULL, 'c'},
 169   {"printf", required_argument, NULL, PRINTF_OPTION},
 170   {"terse", no_argument, NULL, 't'},
 171   {GETOPT_HELP_OPTION_DECL},
 172   {GETOPT_VERSION_OPTION_DECL},
 173   {NULL, 0, NULL, 0}
 174 };
 175
 176 /* Whether to follow symbolic links;  True for --dereference (-L).  */
 177 static bool follow_links;
 178
 179 /* Whether to interpret backslash-escape sequences.
 180    True for --printf=FMT, not for --format=FMT (-c).  */
 181 static bool interpret_backslash_escapes;
 182
 183 /* The trailing delimiter string:
 184    "" for --printf=FMT, "\n" for --format=FMT (-c).  */
 185 static char const *trailing_delim = "";
 186
 187 /* Return the type of the specified file system.
 188    Some systems have statfvs.f_basetype[FSTYPSZ] (AIX, HP-UX, and Solaris).
 189    Others have statvfs.f_fstypename[_VFS_NAMELEN] (NetBSD 3.0).
 190    Others have statfs.f_fstypename[MFSNAMELEN] (NetBSD 1.5.2).
 191    Still others have neither and have to get by with f_type (Linux).
 192    But f_type may only exist in statfs (Cygwin).  */
 193 static char const *
 194 human_fstype (STRUCT_STATVFS const *statfsbuf)
 195 {
 196 #ifdef STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME
 197   return statfsbuf->STATXFS_FILE_SYSTEM_TYPE_MEMBER_NAME;
 198 #else
 199   switch (statfsbuf->f_type)
 200     {
 201 # if defined __linux__
 202
 203       /* Compare with what's in libc:
 204          f=/a/libc/sysdeps/unix/sysv/linux/linux_fsinfo.h
 205          sed -n '/ADFS_SUPER_MAGIC/,/SYSFS_MAGIC/p' $f \
 206            | perl -n -e '/#define (.*?)_(?:SUPER_)MAGIC\s+0x(\S+)/' \
 207              -e 'and print "case S_MAGIC_$1: /\* 0x" . uc($2) . " *\/\n"' \
 208            | sort > sym_libc
 209          perl -ne '/^\s+(case S_MAGIC_.*?): \/\* 0x(\S+) \*\//' \
 210              -e 'and do { $v=uc$2; print "$1: /\* 0x$v *\/\n"}' stat.c \
 211            | sort > sym_stat
 212          diff -u sym_stat sym_libc
 213       */
 214
 215       /* Also sync from the list in "man 2 statfs".  */
 216
 217       /* IMPORTANT NOTE: Each of the following `case S_MAGIC_...:'
 218          statements must be followed by a hexadecimal constant in
 219          a comment.  The S_MAGIC_... name and constant are automatically
 220          combined to produce the #define directives in fs.h.  */
 221
 222     case S_MAGIC_ADFS: /* 0xADF5 */
 223       return "adfs";
 224     case S_MAGIC_AFFS: /* 0xADFF */
 225       return "affs";
 226     case S_MAGIC_AUTOFS: /* 0x187 */
 227       return "autofs";
 228     case S_MAGIC_BEFS: /* 0x42465331 */
 229       return "befs";
 230     case S_MAGIC_BFS: /* 0x1BADFACE */
 231       return "bfs";
 232     case S_MAGIC_BINFMT_MISC: /* 0x42494e4d */
 233       return "binfmt_misc";
 234     case S_MAGIC_CODA: /* 0x73757245 */
 235       return "coda";
 236     case S_MAGIC_COH: /* 0x012FF7B7 */
 237       return "coh";
 238     case S_MAGIC_CRAMFS: /* 0x28CD3D45 */
 239       return "cramfs";
 240     case S_MAGIC_DEVFS: /* 0x1373 */
 241       return "devfs";
 242     case S_MAGIC_DEVPTS: /* 0x1CD1 */
 243       return "devpts";
 244     case S_MAGIC_EFS: /* 0x414A53 */
 245       return "efs";
 246     case S_MAGIC_EXT: /* 0x137D */
 247       return "ext";
 248     case S_MAGIC_EXT2: /* 0xEF53 */
 249       return "ext2/ext3";
 250     case S_MAGIC_EXT2_OLD: /* 0xEF51 */
 251       return "ext2";
 252     case S_MAGIC_FAT: /* 0x4006 */
 253       return "fat";
 254     case S_MAGIC_FUSECTL: /* 0x65735543 */
 255       return "fusectl";
 256     case S_MAGIC_HPFS: /* 0xF995E849 */
 257       return "hpfs";
 258     case S_MAGIC_HUGETLBFS: /* 0x958458f6 */
 259       return "hugetlbfs";
 260     case S_MAGIC_ISOFS: /* 0x9660 */
 261       return "isofs";
 262     case S_MAGIC_ISOFS_R_WIN: /* 0x4004 */
 263       return "isofs";
 264     case S_MAGIC_ISOFS_WIN: /* 0x4000 */
 265       return "isofs";
 266     case S_MAGIC_JFFS2: /* 0x72B6 */
 267       return "jffs2";
 268     case S_MAGIC_JFFS: /* 0x07C0 */
 269       return "jffs";
 270     case S_MAGIC_JFS: /* 0x3153464A */
 271       return "jfs";
 272     case S_MAGIC_MINIX: /* 0x137F */
 273       return "minix";
 274     case S_MAGIC_MINIX_30: /* 0x138F */
 275       return "minix (30 char.)";
 276     case S_MAGIC_MINIX_V2: /* 0x2468 */
 277       return "minix v2";
 278     case S_MAGIC_MINIX_V2_30: /* 0x2478 */
 279       return "minix v2 (30 char.)";
 280     case S_MAGIC_MSDOS: /* 0x4D44 */
 281       return "msdos";
 282     case S_MAGIC_NCP: /* 0x564C */
 283       return "novell";
 284     case S_MAGIC_NFS: /* 0x6969 */
 285       return "nfs";
 286     case S_MAGIC_NFSD: /* 0x6E667364 */
 287       return "nfsd";
 288     case S_MAGIC_NTFS: /* 0x5346544E */
 289       return "ntfs";
 290     case S_MAGIC_OPENPROM: /* 0x9fa1 */
 291       return "openprom";
 292     case S_MAGIC_PROC: /* 0x9FA0 */
 293       return "proc";
 294     case S_MAGIC_QNX4: /* 0x002F */
 295       return "qnx4";
 296     case S_MAGIC_RAMFS: /* 0x858458F6 */
 297       return "ramfs";
 298     case S_MAGIC_REISERFS: /* 0x52654973 */
 299       return "reiserfs";
 300     case S_MAGIC_ROMFS: /* 0x7275 */
 301       return "romfs";
 302     case S_MAGIC_SMB: /* 0x517B */
 303       return "smb";
 304     case S_MAGIC_SQUASHFS: /* 0x73717368 */
 305       return "squashfs";
 306     case S_MAGIC_SYSFS: /* 0x62656572 */
 307       return "sysfs";
 308     case S_MAGIC_SYSV2: /* 0x012FF7B6 */
 309       return "sysv2";
 310     case S_MAGIC_SYSV4: /* 0x012FF7B5 */
 311       return "sysv4";
 312     case S_MAGIC_TMPFS: /* 0x1021994 */
 313       return "tmpfs";
 314     case S_MAGIC_UDF: /* 0x15013346 */
 315       return "udf";
 316     case S_MAGIC_UFS: /* 0x00011954 */
 317       return "ufs";
 318     case S_MAGIC_UFS_BYTESWAPPED: /* 0x54190100 */
 319       return "ufs";
 320     case S_MAGIC_USBDEVFS: /* 0x9FA2 */
 321       return "usbdevfs";
 322     case S_MAGIC_VXFS: /* 0xA501FCF5 */
 323       return "vxfs";
 324     case S_MAGIC_XENIX: /* 0x012FF7B4 */
 325       return "xenix";
 326     case S_MAGIC_XFS: /* 0x58465342 */
 327       return "xfs";
 328     case S_MAGIC_XIAFS: /* 0x012FD16D */
 329       return "xia";
 330
 331 # elif __GNU__
 332     case FSTYPE_UFS:
 333       return "ufs";
 334     case FSTYPE_NFS:
 335       return "nfs";
 336     case FSTYPE_GFS:
 337       return "gfs";
 338     case FSTYPE_LFS:
 339       return "lfs";
 340     case FSTYPE_SYSV:
 341       return "sysv";
 342     case FSTYPE_FTP:
 343       return "ftp";
 344     case FSTYPE_TAR:
 345       return "tar";
 346     case FSTYPE_AR:
 347       return "ar";
 348     case FSTYPE_CPIO:
 349       return "cpio";
 350     case FSTYPE_MSLOSS:
 351       return "msloss";
 352     case FSTYPE_CPM:
 353       return "cpm";
 354     case FSTYPE_HFS:
 355       return "hfs";
 356     case FSTYPE_DTFS:
 357       return "dtfs";
 358     case FSTYPE_GRFS:
 359       return "grfs";
 360     case FSTYPE_TERM:
 361       return "term";
 362     case FSTYPE_DEV:
 363       return "dev";
 364     case FSTYPE_PROC:
 365       return "proc";
 366     case FSTYPE_IFSOCK:
 367       return "ifsock";
 368     case FSTYPE_AFS:
 369       return "afs";
 370     case FSTYPE_DFS:
 371       return "dfs";
 372     case FSTYPE_PROC9:
 373       return "proc9";
 374     case FSTYPE_SOCKET:
 375       return "socket";
 376     case FSTYPE_MISC:
 377       return "misc";
 378     case FSTYPE_EXT2FS:
 379       return "ext2/ext3";
 380     case FSTYPE_HTTP:
 381       return "http";
 382     case FSTYPE_MEMFS:
 383       return "memfs";
 384     case FSTYPE_ISO9660:
 385       return "iso9660";
 386 # endif
 387     default:
 388       {
 389         unsigned long int type = statfsbuf->f_type;
 390         static char buf[sizeof "UNKNOWN (0x%lx)" - 3
 391                         + (sizeof type * CHAR_BIT + 3) / 4];
 392         sprintf (buf, "UNKNOWN (0x%lx)", type);
 393         return buf;
 394       }
 395     }
 396 #endif
 397 }
 398
 399 static char *
 400 human_access (struct stat const *statbuf)
 401 {
 402   static char modebuf[12];
 403   filemodestring (statbuf, modebuf);
 404   modebuf[10] = 0;
 405   return modebuf;
 406 }
 407
 408 static char *
 409 human_time (struct timespec t)
 410 {
 411   static char str[MAX (INT_BUFSIZE_BOUND (intmax_t),
 412                        (INT_STRLEN_BOUND (int) /* YYYY */
 413                         + 1 /* because YYYY might equal INT_MAX + 1900 */
 414                         + sizeof "-MM-DD HH:MM:SS.NNNNNNNNN +ZZZZ"))];
 415   struct tm const *tm = localtime (&t.tv_sec);
 416   if (tm == NULL)
 417     return timetostr (t.tv_sec, str);
 418   nstrftime (str, sizeof str, "%Y-%m-%d %H:%M:%S.%N %z", tm, 0, t.tv_nsec);
 419   return str;
 420 }
 421
 422 static void
 423 out_string (char *pformat, size_t prefix_len, char const *arg)
 424 {
 425   strcpy (pformat + prefix_len, "s");
 426   printf (pformat, arg);
 427 }
 428 static void
 429 out_int (char *pformat, size_t prefix_len, intmax_t arg)
 430 {
 431   strcpy (pformat + prefix_len, PRIdMAX);
 432   printf (pformat, arg);
 433 }
 434 static void
 435 out_uint (char *pformat, size_t prefix_len, uintmax_t arg)
 436 {
 437   strcpy (pformat + prefix_len, PRIuMAX);
 438   printf (pformat, arg);
 439 }
 440 static void
 441 out_uint_o (char *pformat, size_t prefix_len, uintmax_t arg)
 442 {
 443   strcpy (pformat + prefix_len, PRIoMAX);
 444   printf (pformat, arg);
 445 }
 446 static void
 447 out_uint_x (char *pformat, size_t prefix_len, uintmax_t arg)
 448 {
 449   strcpy (pformat + prefix_len, PRIxMAX);
 450   printf (pformat, arg);
 451 }
 452
 453 /* Very specialized function (modifies FORMAT), just so as to avoid
 454    duplicating this code between both print_statfs and print_stat.  */
 455 static void
 456 out_file_context (char const *filename, char *pformat, size_t prefix_len)
 457 {
 458   char *scontext;
 459   if ((follow_links
 460        ? getfilecon (filename, &scontext)
 461        : lgetfilecon (filename, &scontext)) < 0)
 462     {
 463       error (0, errno, _("failed to get security context of %s"),
 464              quote (filename));
 465       scontext = NULL;
 466     }
 467   strcpy (pformat + prefix_len, "s");
 468   printf (pformat, (scontext ? scontext : "?"));
 469   if (scontext)
 470     freecon (scontext);
 471 }
 472
 473 /* print statfs info */
 474 static void
 475 print_statfs (char *pformat, size_t prefix_len, char m, char const *filename,
 476               void const *data)
 477 {
 478   STRUCT_STATVFS const *statfsbuf = data;
 479
 480   switch (m)
 481     {
 482     case 'n':
 483       out_string (pformat, prefix_len, filename);
 484       break;
 485
 486     case 'i':
 487       {
 488 #if STRUCT_STATXFS_F_FSID_IS_INTEGER
 489         uintmax_t fsid = statfsbuf->f_fsid;
 490 #else
 491         typedef unsigned int fsid_word;
 492         verify (alignof (STRUCT_STATVFS) % alignof (fsid_word) == 0);
 493         verify (offsetof (STRUCT_STATVFS, f_fsid) % alignof (fsid_word) == 0);
 494         verify (sizeof statfsbuf->f_fsid % alignof (fsid_word) == 0);
 495         fsid_word const *p = (fsid_word *) &statfsbuf->f_fsid;
 496
 497         /* Assume a little-endian word order, as that is compatible
 498            with glibc's statvfs implementation.  */
 499         uintmax_t fsid = 0;
 500         int words = sizeof statfsbuf->f_fsid / sizeof *p;
 501         int i;
 502         for (i = 0; i < words && i * sizeof *p < sizeof fsid; i++)
 503           {
 504             uintmax_t u = p[words - 1 - i];
 505             fsid |= u << (i * CHAR_BIT * sizeof *p);
 506           }
 507 #endif
 508         out_uint_x (pformat, prefix_len, fsid);
 509       }
 510       break;
 511
 512     case 'l':
 513       OUT_NAMEMAX (pformat, prefix_len, SB_F_NAMEMAX (statfsbuf));
 514       break;
 515     case 't':
 516 #if HAVE_STRUCT_STATXFS_F_TYPE
 517       out_uint_x (pformat, prefix_len, statfsbuf->f_type);
 518 #else
 519       fputc ('?', stdout);
 520 #endif
 521       break;
 522     case 'T':
 523       out_string (pformat, prefix_len, human_fstype (statfsbuf));
 524       break;
 525     case 'b':
 526       out_int (pformat, prefix_len, statfsbuf->f_blocks);
 527       break;
 528     case 'f':
 529       out_int (pformat, prefix_len, statfsbuf->f_bfree);
 530       break;
 531     case 'a':
 532       out_int (pformat, prefix_len, statfsbuf->f_bavail);
 533       break;
 534     case 's':
 535       out_uint (pformat, prefix_len, statfsbuf->f_bsize);
 536       break;
 537     case 'S':
 538       {
 539         uintmax_t frsize = STATFS_FRSIZE (statfsbuf);
 540         if (! frsize)
 541           frsize = statfsbuf->f_bsize;
 542         out_uint (pformat, prefix_len, frsize);
 543       }
 544       break;
 545     case 'c':
 546       out_int (pformat, prefix_len, statfsbuf->f_files);
 547       break;
 548     case 'd':
 549       out_int (pformat, prefix_len, statfsbuf->f_ffree);
 550       break;
 551     case 'C':
 552       out_file_context (filename, pformat, prefix_len);
 553       break;
 554     default:
 555       fputc ('?', stdout);
 556       break;
 557     }
 558 }
 559
 560 /* print stat info */
 561 static void
 562 print_stat (char *pformat, size_t prefix_len, char m,
 563             char const *filename, void const *data)
 564 {
 565   struct stat *statbuf = (struct stat *) data;
 566   struct passwd *pw_ent;
 567   struct group *gw_ent;
 568
 569   switch (m)
 570     {
 571     case 'n':
 572       out_string (pformat, prefix_len, filename);
 573       break;
 574     case 'N':
 575       out_string (pformat, prefix_len, quote (filename));
 576       if (S_ISLNK (statbuf->st_mode))
 577         {
 578           char *linkname = areadlink_with_size (filename, statbuf->st_size);
 579           if (linkname == NULL)
 580             {
 581               error (0, errno, _("cannot read symbolic link %s"),
 582                      quote (filename));
 583               return;
 584             }
 585           printf (" -> ");
 586           out_string (pformat, prefix_len, quote (linkname));
 587         }
 588       break;
 589     case 'd':
 590       out_uint (pformat, prefix_len, statbuf->st_dev);
 591       break;
 592     case 'D':
 593       out_uint_x (pformat, prefix_len, statbuf->st_dev);
 594       break;
 595     case 'i':
 596       out_uint (pformat, prefix_len, statbuf->st_ino);
 597       break;
 598     case 'a':
 599       out_uint_o (pformat, prefix_len, statbuf->st_mode & CHMOD_MODE_BITS);
 600       break;
 601     case 'A':
 602       out_string (pformat, prefix_len, human_access (statbuf));
 603       break;
 604     case 'f':
 605       out_uint_x (pformat, prefix_len, statbuf->st_mode);
 606       break;
 607     case 'F':
 608       out_string (pformat, prefix_len, file_type (statbuf));
 609       break;
 610     case 'h':
 611       out_uint (pformat, prefix_len, statbuf->st_nlink);
 612       break;
 613     case 'u':
 614       out_uint (pformat, prefix_len, statbuf->st_uid);
 615       break;
 616     case 'U':
 617       setpwent ();
 618       pw_ent = getpwuid (statbuf->st_uid);
 619       out_string (pformat, prefix_len,
 620                   pw_ent ? pw_ent->pw_name : "UNKNOWN");
 621       break;
 622     case 'g':
 623       out_uint (pformat, prefix_len, statbuf->st_gid);
 624       break;
 625     case 'G':
 626       setgrent ();
 627       gw_ent = getgrgid (statbuf->st_gid);
 628       out_string (pformat, prefix_len,
 629                   gw_ent ? gw_ent->gr_name : "UNKNOWN");
 630       break;
 631     case 't':
 632       out_uint_x (pformat, prefix_len, major (statbuf->st_rdev));
 633       break;
 634     case 'T':
 635       out_uint_x (pformat, prefix_len, minor (statbuf->st_rdev));
 636       break;
 637     case 's':
 638       out_uint (pformat, prefix_len, statbuf->st_size);
 639       break;
 640     case 'B':
 641       out_uint (pformat, prefix_len, ST_NBLOCKSIZE);
 642       break;
 643     case 'b':
 644       out_uint (pformat, prefix_len, ST_NBLOCKS (*statbuf));
 645       break;
 646     case 'o':
 647       out_uint (pformat, prefix_len, statbuf->st_blksize);
 648       break;
 649     case 'x':
 650       out_string (pformat, prefix_len, human_time (get_stat_atime (statbuf)));
 651       break;
 652     case 'X':
 653       if (TYPE_SIGNED (time_t))
 654         out_int (pformat, prefix_len, statbuf->st_atime);
 655       else
 656         out_uint (pformat, prefix_len, statbuf->st_atime);
 657       break;
 658     case 'y':
 659       out_string (pformat, prefix_len, human_time (get_stat_mtime (statbuf)));
 660       break;
 661     case 'Y':
 662       if (TYPE_SIGNED (time_t))
 663         out_int (pformat, prefix_len, statbuf->st_mtime);
 664       else
 665         out_uint (pformat, prefix_len, statbuf->st_mtime);
 666       break;
 667     case 'z':
 668       out_string (pformat, prefix_len, human_time (get_stat_ctime (statbuf)));
 669       break;
 670     case 'Z':
 671       if (TYPE_SIGNED (time_t))
 672         out_int (pformat, prefix_len, statbuf->st_ctime);
 673       else
 674         out_uint (pformat, prefix_len, statbuf->st_ctime);
 675       break;
 676     case 'C':
 677       out_file_context (filename, pformat, prefix_len);
 678       break;
 679     default:
 680       fputc ('?', stdout);
 681       break;
 682     }
 683 }
 684
 685 /* Output a single-character \ escape.  */
 686
 687 static void
 688 print_esc_char (char c)
 689 {
 690   switch (c)
 691     {
 692     case 'a':                   /* Alert. */
 693       c ='\a';
 694       break;
 695     case 'b':                   /* Backspace. */
 696       c ='\b';
 697       break;
 698     case 'f':                   /* Form feed. */
 699       c ='\f';
 700       break;
 701     case 'n':                   /* New line. */
 702       c ='\n';
 703       break;
 704     case 'r':                   /* Carriage return. */
 705       c ='\r';
 706       break;
 707     case 't':                   /* Horizontal tab. */
 708       c ='\t';
 709       break;
 710     case 'v':                   /* Vertical tab. */
 711       c ='\v';
 712       break;
 713     case '"':
 714     case '\\':
 715       break;
 716     default:
 717       error (0, 0, _("warning: unrecognized escape `\\%c'"), c);
 718       break;
 719     }
 720   putchar (c);
 721 }
 722
 723 static void
 724 print_it (char const *format, char const *filename,
 725           void (*print_func) (char *, size_t, char, char const *, void const *),
 726           void const *data)
 727 {
 728   /* Add 2 to accommodate our conversion of the stat `%s' format string
 729      to the longer printf `%llu' one.  */
 730   enum
 731     {
 732       MAX_ADDITIONAL_BYTES =
 733         (MAX (sizeof PRIdMAX,
 734               MAX (sizeof PRIoMAX, MAX (sizeof PRIuMAX, sizeof PRIxMAX)))
 735          - 1)
 736     };
 737   size_t n_alloc = strlen (format) + MAX_ADDITIONAL_BYTES + 1;
 738   char *dest = xmalloc (n_alloc);
 739   char const *b;
 740   for (b = format; *b; b++)
 741     {
 742       switch (*b)
 743         {
 744         case '%':
 745           {
 746             size_t len = strspn (b + 1, "#-+.I 0123456789");
 747             char const *fmt_char = b + len + 1;
 748             memcpy (dest, b, len + 1);
 749
 750             b = fmt_char;
 751             switch (*fmt_char)
 752               {
 753               case '\0':
 754                 --b;
 755                 /* fall through */
 756               case '%':
 757                 if (0 < len)
 758                   {
 759                     dest[len + 1] = *fmt_char;
 760                     dest[len + 2] = '\0';
 761                     error (EXIT_FAILURE, 0, _("%s: invalid directive"),
 762                            quotearg_colon (dest));
 763                   }
 764                 putchar ('%');
 765                 break;
 766               default:
 767                 print_func (dest, len + 1, *fmt_char, filename, data);
 768                 break;
 769               }
 770             break;
 771           }
 772
 773         case '\\':
 774           if ( ! interpret_backslash_escapes)
 775             {
 776               putchar ('\\');
 777               break;
 778             }
 779           ++b;
 780           if (isodigit (*b))
 781             {
 782               int esc_value = octtobin (*b);
 783               int esc_length = 1;       /* number of octal digits */
 784               for (++b; esc_length < 3 && isodigit (*b);
 785                    ++esc_length, ++b)
 786                 {
 787                   esc_value = esc_value * 8 + octtobin (*b);
 788                 }
 789               putchar (esc_value);
 790               --b;
 791             }
 792           else if (*b == 'x' && isxdigit (to_uchar (b[1])))
 793             {
 794               int esc_value = hextobin (b[1]);  /* Value of \xhh escape. */
 795               /* A hexadecimal \xhh escape sequence must have
 796                  1 or 2 hex. digits.  */
 797               ++b;
 798               if (isxdigit (to_uchar (b[1])))
 799                 {
 800                   ++b;
 801                   esc_value = esc_value * 16 + hextobin (*b);
 802                 }
 803               putchar (esc_value);
 804             }
 805           else if (*b == '\0')
 806             {
 807               error (0, 0, _("warning: backslash at end of format"));
 808               putchar ('\\');
 809               /* Arrange to exit the loop.  */
 810               --b;
 811             }
 812           else
 813             {
 814               print_esc_char (*b);
 815             }
 816           break;
 817
 818         default:
 819           putchar (*b);
 820           break;
 821         }
 822     }
 823   free (dest);
 824
 825   fputs (trailing_delim, stdout);
 826 }
 827
 828 /* Stat the file system and print what we find.  */
 829 static bool
 830 do_statfs (char const *filename, bool terse, char const *format)
 831 {
 832   STRUCT_STATVFS statfsbuf;
 833
 834   if (STATFS (filename, &statfsbuf) != 0)
 835     {
 836       error (0, errno, _("cannot read file system information for %s"),
 837              quote (filename));
 838       return false;
 839     }
 840
 841   if (format == NULL)
 842     {
 843       format = (terse
 844                 ? "%n %i %l %t %s %S %b %f %a %c %d\n"
 845                 : "  File: \"%n\"\n"
 846                 "    ID: %-8i Namelen: %-7l Type: %T\n"
 847                 "Block size: %-10s Fundamental block size: %S\n"
 848                 "Blocks: Total: %-10b Free: %-10f Available: %a\n"
 849                 "Inodes: Total: %-10c Free: %d\n");
 850     }
 851
 852   print_it (format, filename, print_statfs, &statfsbuf);
 853   return true;
 854 }
 855
 856 /* stat the file and print what we find */
 857 static bool
 858 do_stat (char const *filename, bool terse, char const *format)
 859 {
 860   struct stat statbuf;
 861
 862   if ((follow_links ? stat : lstat) (filename, &statbuf) != 0)
 863     {
 864       error (0, errno, _("cannot stat %s"), quote (filename));
 865       return false;
 866     }
 867
 868   if (format == NULL)
 869     {
 870       if (terse)
 871         {
 872           format = "%n %s %b %f %u %g %D %i %h %t %T %X %Y %Z %o\n";
 873         }
 874       else
 875         {
 876           /* Temporary hack to match original output until conditional
 877              implemented.  */
 878           if (S_ISBLK (statbuf.st_mode) || S_ISCHR (statbuf.st_mode))
 879             {
 880               format =
 881                 "  File: %N\n"
 882                 "  Size: %-10s\tBlocks: %-10b IO Block: %-6o %F\n"
 883                 "Device: %Dh/%dd\tInode: %-10i  Links: %-5h"
 884                 " Device type: %t,%T\n"
 885                 "Access: (%04a/%10.10A)  Uid: (%5u/%8U)   Gid: (%5g/%8G)\n"
 886                 "Access: %x\n" "Modify: %y\n" "Change: %z\n";
 887             }
 888           else
 889             {
 890               format =
 891                 "  File: %N\n"
 892                 "  Size: %-10s\tBlocks: %-10b IO Block: %-6o %F\n"
 893                 "Device: %Dh/%dd\tInode: %-10i  Links: %h\n"
 894                 "Access: (%04a/%10.10A)  Uid: (%5u/%8U)   Gid: (%5g/%8G)\n"
 895                 "Access: %x\n" "Modify: %y\n" "Change: %z\n";
 896             }
 897         }
 898     }
 899   print_it (format, filename, print_stat, &statbuf);
 900   return true;
 901 }
 902
 903 void
 904 usage (int status)
 905 {
 906   if (status != EXIT_SUCCESS)
 907     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 908              program_name);
 909   else
 910     {
 911       printf (_("Usage: %s [OPTION]... FILE...\n"), program_name);
 912       fputs (_("\
 913 Display file or file system status.\n\
 914 \n\
 915   -L, --dereference     follow links\n\
 916   -f, --file-system     display file system status instead of file status\n\
 917 "), stdout);
 918       fputs (_("\
 919   -c  --format=FORMAT   use the specified FORMAT instead of the default;\n\
 920                           output a newline after each use of FORMAT\n\
 921       --printf=FORMAT   like --format, but interpret backslash escapes,\n\
 922                           and do not output a mandatory trailing newline.\n\
 923                           If you want a newline, include \\n in FORMAT.\n\
 924   -t, --terse           print the information in terse form\n\
 925 "), stdout);
 926       fputs (HELP_OPTION_DESCRIPTION, stdout);
 927       fputs (VERSION_OPTION_DESCRIPTION, stdout);
 928
 929       fputs (_("\n\
 930 The valid format sequences for files (without --file-system):\n\
 931 \n\
 932   %a   Access rights in octal\n\
 933   %A   Access rights in human readable form\n\
 934   %b   Number of blocks allocated (see %B)\n\
 935   %B   The size in bytes of each block reported by %b\n\
 936   %C   SELinux security context string\n\
 937 "), stdout);
 938       fputs (_("\
 939   %d   Device number in decimal\n\
 940   %D   Device number in hex\n\
 941   %f   Raw mode in hex\n\
 942   %F   File type\n\
 943   %g   Group ID of owner\n\
 944   %G   Group name of owner\n\
 945 "), stdout);
 946       fputs (_("\
 947   %h   Number of hard links\n\
 948   %i   Inode number\n\
 949   %n   File name\n\
 950   %N   Quoted file name with dereference if symbolic link\n\
 951   %o   I/O block size\n\
 952   %s   Total size, in bytes\n\
 953   %t   Major device type in hex\n\
 954   %T   Minor device type in hex\n\
 955 "), stdout);
 956       fputs (_("\
 957   %u   User ID of owner\n\
 958   %U   User name of owner\n\
 959   %x   Time of last access\n\
 960   %X   Time of last access as seconds since Epoch\n\
 961   %y   Time of last modification\n\
 962   %Y   Time of last modification as seconds since Epoch\n\
 963   %z   Time of last change\n\
 964   %Z   Time of last change as seconds since Epoch\n\
 965 \n\
 966 "), stdout);
 967
 968       fputs (_("\
 969 Valid format sequences for file systems:\n\
 970 \n\
 971   %a   Free blocks available to non-superuser\n\
 972   %b   Total data blocks in file system\n\
 973   %c   Total file nodes in file system\n\
 974   %d   Free file nodes in file system\n\
 975   %f   Free blocks in file system\n\
 976   %C   SELinux security context string\n\
 977 "), stdout);
 978       fputs (_("\
 979   %i   File System ID in hex\n\
 980   %l   Maximum length of filenames\n\
 981   %n   File name\n\
 982   %s   Block size (for faster transfers)\n\
 983   %S   Fundamental block size (for block counts)\n\
 984   %t   Type in hex\n\
 985   %T   Type in human readable form\n\
 986 "), stdout);
 987       printf (USAGE_BUILTIN_WARNING, PROGRAM_NAME);
 988       emit_bug_reporting_address ();
 989     }
 990   exit (status);
 991 }
 992
 993 int
 994 main (int argc, char *argv[])
 995 {
 996   int c;
 997   int i;
 998   bool fs = false;
 999   bool terse = false;
1000   char *format = NULL;
1001   bool ok = true;
1002
1003   initialize_main (&argc, &argv);
1004   set_program_name (argv[0]);
1005   setlocale (LC_ALL, "");
1006   bindtextdomain (PACKAGE, LOCALEDIR);
1007   textdomain (PACKAGE);
1008
1009   atexit (close_stdout);
1010
1011   while ((c = getopt_long (argc, argv, "c:fLtZ", long_options, NULL)) != -1)
1012     {
1013       switch (c)
1014         {
1015         case PRINTF_OPTION:
1016           format = optarg;
1017           interpret_backslash_escapes = true;
1018           trailing_delim = "";
1019           break;
1020
1021         case 'c':
1022           format = optarg;
1023           interpret_backslash_escapes = false;
1024           trailing_delim = "\n";
1025           break;
1026
1027         case 'L':
1028           follow_links = true;
1029           break;
1030
1031         case 'f':
1032           fs = true;
1033           break;
1034
1035         case 't':
1036           terse = true;
1037           break;
1038
1039         case 'Z':  /* FIXME: remove in 2010 */
1040           /* Ignore, for compatibility with distributions
1041              that implemented this before upstream.
1042              But warn of impending removal.  */
1043           error (0, 0,
1044                  _("the --context (-Z) option is obsolete and will be removed\n"
1045                    "in a future release"));
1046           break;
1047
1048         case_GETOPT_HELP_CHAR;
1049
1050         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
1051
1052         default:
1053           usage (EXIT_FAILURE);
1054         }
1055     }
1056
1057   if (argc == optind)
1058     {
1059       error (0, 0, _("missing operand"));
1060       usage (EXIT_FAILURE);
1061     }
1062
1063   for (i = optind; i < argc; i++)
1064     ok &= (fs
1065            ? do_statfs (argv[i], terse, format)
1066            : do_stat (argv[i], terse, format));
1067
1068   exit (ok ? EXIT_SUCCESS : EXIT_FAILURE);
1069 }