find/defs.h

   1 /* defs.h -- data types and declarations.
   2    Copyright (C) 1990, 91, 92, 93, 94, 2000, 2004 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 2, or (at your option)
   7    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, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17    USA.
  18 */
  19 #ifndef INC_DEFS_H
  20 #define INC_DEFS_H 1
  21
  22 #include <config.h>
  23 #include <sys/types.h>
  24 #include <sys/stat.h>
  25 #include <stdio.h>
  26
  27 #if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
  28 #include <string.h>
  29 #else
  30 #include <strings.h>
  31 #ifndef strchr
  32 #define strchr index
  33 #endif
  34 #ifndef strrchr
  35 #define strrchr rindex
  36 #endif
  37 #endif
  38
  39 #include <errno.h>
  40 #ifndef errno
  41 extern int errno;
  42 #endif
  43
  44 #ifdef STDC_HEADERS
  45 #include <stdlib.h>
  46 #endif
  47
  48 /* The presence of unistd.h is assumed by gnulib these days, so we
  49  * might as well assume it too.
  50  */
  51 #include <unistd.h>
  52
  53 #include <time.h>
  54
  55 #if HAVE_LIMITS_H
  56 # include <limits.h>
  57 #endif
  58 #ifndef CHAR_BIT
  59 # define CHAR_BIT 8
  60 #endif
  61
  62 #if HAVE_INTTYPES_H
  63 # include <inttypes.h>
  64 #endif
  65
  66 #include "regex.h"
  67
  68 #ifndef S_IFLNK
  69 #define lstat stat
  70 #endif
  71
  72 # ifndef PARAMS
  73 #  if defined PROTOTYPES || (defined __STDC__ && __STDC__)
  74 #   define PARAMS(Args) Args
  75 #  else
  76 #   define PARAMS(Args) ()
  77 #  endif
  78 # endif
  79
  80 int lstat PARAMS((const char *__path, struct stat *__statbuf));
  81 int stat PARAMS((const char *__path, struct stat *__statbuf));
  82
  83 int optionl_stat PARAMS((const char *name, struct stat *p));
  84 int optionp_stat PARAMS((const char *name, struct stat *p));
  85 int optionh_stat PARAMS((const char *name, struct stat *p));
  86 int debug_stat   PARAMS((const char *file, struct stat *bufp));
  87
  88 int get_statinfo PARAMS((const char *pathname, const char *name, struct stat *p));
  89
  90 #if ! defined HAVE_FCHDIR && ! defined fchdir
  91 # define fchdir(fd) (-1)
  92 #endif
  93
  94
  95
  96 #ifndef S_ISUID
  97 # define S_ISUID 0004000
  98 #endif
  99 #ifndef S_ISGID
 100 # define S_ISGID 0002000
 101 #endif
 102 #ifndef S_ISVTX
 103 # define S_ISVTX 0001000
 104 #endif
 105 #ifndef S_IRUSR
 106 # define S_IRUSR 0000400
 107 #endif
 108 #ifndef S_IWUSR
 109 # define S_IWUSR 0000200
 110 #endif
 111 #ifndef S_IXUSR
 112 # define S_IXUSR 0000100
 113 #endif
 114 #ifndef S_IRGRP
 115 # define S_IRGRP 0000040
 116 #endif
 117 #ifndef S_IWGRP
 118 # define S_IWGRP 0000020
 119 #endif
 120 #ifndef S_IXGRP
 121 # define S_IXGRP 0000010
 122 #endif
 123 #ifndef S_IROTH
 124 # define S_IROTH 0000004
 125 #endif
 126 #ifndef S_IWOTH
 127 # define S_IWOTH 0000002
 128 #endif
 129 #ifndef S_IXOTH
 130 # define S_IXOTH 0000001
 131 #endif
 132
 133 #define MODE_WXUSR      (S_IWUSR | S_IXUSR)
 134 #define MODE_R          (S_IRUSR | S_IRGRP | S_IROTH)
 135 #define MODE_RW         (S_IWUSR | S_IWGRP | S_IWOTH | MODE_R)
 136 #define MODE_RWX        (S_IXUSR | S_IXGRP | S_IXOTH | MODE_RW)
 137 #define MODE_ALL        (S_ISUID | S_ISGID | S_ISVTX | MODE_RWX)
 138
 139 #if 1
 140 #include <stdbool.h>
 141 typedef bool boolean;
 142 #else
 143 /* Not char because of type promotion; NeXT gcc can't handle it.  */
 144 typedef int boolean;
 145 #define         true    1
 146 #define         false   0
 147 #endif
 148
 149 struct predicate;
 150
 151 /* Pointer to a predicate function. */
 152 typedef boolean (*PRED_FUNC)(char *pathname, struct stat *stat_buf, struct predicate *pred_ptr);
 153
 154 /* The number of seconds in a day. */
 155 #define         DAYSECS     86400
 156
 157 /* Argument structures for predicates. */
 158
 159 enum comparison_type
 160 {
 161   COMP_GT,
 162   COMP_LT,
 163   COMP_EQ
 164 };
 165
 166 enum permissions_type
 167 {
 168   PERM_AT_LEAST,
 169   PERM_ANY,
 170   PERM_EXACT
 171 };
 172
 173 enum predicate_type
 174 {
 175   NO_TYPE,
 176   PRIMARY_TYPE,
 177   UNI_OP,
 178   BI_OP,
 179   OPEN_PAREN,
 180   CLOSE_PAREN
 181 };
 182
 183 enum predicate_precedence
 184 {
 185   NO_PREC,
 186   COMMA_PREC,
 187   OR_PREC,
 188   AND_PREC,
 189   NEGATE_PREC,
 190   MAX_PREC
 191 };
 192
 193 struct long_val
 194 {
 195   enum comparison_type kind;
 196   boolean negative;             /* Defined only when representing time_t.  */
 197   uintmax_t l_val;
 198 };
 199
 200 struct perm_val
 201 {
 202   enum permissions_type kind;
 203   mode_t val;
 204 };
 205
 206 /* dir_id is used to support loop detection in find.c and
 207  * also to support the -samefile test.
 208  */
 209 struct dir_id
 210 {
 211   ino_t ino;
 212   dev_t dev;
 213 };
 214
 215 struct size_val
 216 {
 217   enum comparison_type kind;
 218   int blocksize;
 219   uintmax_t size;
 220 };
 221
 222 #define NEW_EXEC 1
 223 /*
 224 #undef NEW_EXEC
 225 */
 226
 227 #if !defined(NEW_EXEC)
 228 struct path_arg
 229 {
 230   short offset;                 /* Offset in `vec' of this arg. */
 231   short count;                  /* Number of path replacements in this arg. */
 232   char *origarg;                /* Arg with "{}" intact. */
 233 };
 234 #endif
 235
 236 #include "buildcmd.h"
 237
 238 struct exec_val
 239 {
 240 #if defined(NEW_EXEC)
 241   /* new-style */
 242   boolean multiple;             /* -exec {} \+ denotes multiple argument. */
 243   struct buildcmd_control ctl;
 244   struct buildcmd_state   state;
 245   char **replace_vec;           /* Command arguments (for ";" style) */
 246   int num_args;
 247   boolean use_current_dir;      /* If nonzero, don't chdir to start dir */
 248   boolean close_stdin;          /* If true, close stdin in the child. */
 249 #else
 250   struct path_arg *paths;       /* Array of args with path replacements. */
 251   char **vec;                   /* Array of args to pass to program. */
 252 #endif
 253 };
 254
 255 /* The format string for a -printf or -fprintf is chopped into one or
 256    more `struct segment', linked together into a list.
 257    Each stretch of plain text is a segment, and
 258    each \c and `%' conversion is a segment. */
 259
 260 /* Special values for the `kind' field of `struct segment'. */
 261 #define KIND_PLAIN 0            /* Segment containing just plain text. */
 262 #define KIND_STOP 1             /* \c -- stop printing and flush output. */
 263
 264 struct segment
 265 {
 266   int kind;                     /* Format chars or KIND_{PLAIN,STOP}. */
 267   char *text;                   /* Plain text or `%' format string. */
 268   int text_len;                 /* Length of `text'. */
 269   struct segment *next;         /* Next segment for this predicate. */
 270 };
 271
 272 struct format_val
 273 {
 274   struct segment *segment;      /* Linked list of segments. */
 275   FILE *stream;                 /* Output stream to print on. */
 276   boolean dest_is_tty;          /* True if the destination is a terminal. */
 277   struct quoting_options *quote_opts;
 278 };
 279
 280 struct predicate
 281 {
 282   /* Pointer to the function that implements this predicate.  */
 283   PRED_FUNC pred_func;
 284
 285   /* Only used for debugging, but defined unconditionally so individual
 286      modules can be compiled with -DDEBUG.  */
 287   char *p_name;
 288
 289   /* The type of this node.  There are two kinds.  The first is real
 290      predicates ("primaries") such as -perm, -print, or -exec.  The
 291      other kind is operators for combining predicates. */
 292   enum predicate_type p_type;
 293
 294   /* The precedence of this node.  Only has meaning for operators. */
 295   enum predicate_precedence p_prec;
 296
 297   /* True if this predicate node produces side effects.
 298      If side_effects are produced
 299      then optimization will not be performed */
 300   boolean side_effects;
 301
 302   /* True if this predicate node requires default print be turned off. */
 303   boolean no_default_print;
 304
 305   /* True if this predicate node requires a stat system call to execute. */
 306   boolean need_stat;
 307
 308   /* True if this predicate node requires knowledge of the file type. */
 309   boolean need_type;
 310
 311   /* True if this predicate should display control characters literally */
 312   boolean literal_control_chars;
 313
 314   /* Information needed by the predicate processor.
 315      Next to each member are listed the predicates that use it. */
 316   union
 317   {
 318     char *str;                  /* fstype [i]lname [i]name [i]path */
 319     struct re_pattern_buffer *regex; /* regex */
 320     struct exec_val exec_vec;   /* exec ok */
 321     struct long_val info;       /* atime ctime gid inum links mtime
 322                                    size uid */
 323     struct size_val size;       /* size */
 324     uid_t uid;                  /* user */
 325     gid_t gid;                  /* group */
 326     time_t time;                /* newer */
 327     struct perm_val perm;       /* perm */
 328     struct dir_id   fileid;     /* samefile */
 329     mode_t type;                /* type */
 330     FILE *stream;               /* ls fls fprint0 */
 331     struct format_val printf_vec; /* printf fprintf fprint  */
 332   } args;
 333
 334   /* The next predicate in the user input sequence,
 335      which represents the order in which the user supplied the
 336      predicates on the command line. */
 337   struct predicate *pred_next;
 338
 339   /* The right and left branches from this node in the expression
 340      tree, which represents the order in which the nodes should be
 341      processed. */
 342   struct predicate *pred_left;
 343   struct predicate *pred_right;
 344
 345   const struct parser_table* parser_entry;
 346 };
 347
 348 /* find.c, ftsfind.c */
 349 boolean is_fts_enabled();
 350
 351
 352
 353 /* find library function declarations.  */
 354
 355 /* dirname.c */
 356 char *dirname PARAMS((char *path));
 357
 358 /* error.c */
 359 void error PARAMS((int status, int errnum, char *message, ...));
 360
 361 /* listfile.c */
 362 char *get_link_name PARAMS((char *name, char *relname));
 363
 364 /* stpcpy.c */
 365 #if !HAVE_STPCPY
 366 char *stpcpy PARAMS((char *dest, const char *src));
 367 #endif
 368
 369 /* xgetcwd.c */
 370 char *xgetcwd PARAMS((void));
 371
 372 /* xmalloc.c */
 373 #if __STDC__
 374 #define VOID void
 375 #else
 376 #define VOID char
 377 #endif
 378
 379 /* find global function declarations.  */
 380
 381 /* find.c */
 382 /* SymlinkOption represents the choice of
 383  * -P, -L or -P (default) on the command line.
 384  */
 385 enum SymlinkOption
 386   {
 387     SYMLINK_NEVER_DEREF,        /* Option -P */
 388     SYMLINK_ALWAYS_DEREF,       /* Option -L */
 389     SYMLINK_DEREF_ARGSONLY      /* Option -H */
 390   };
 391 extern enum SymlinkOption symlink_handling; /* defined in find.c. */
 392
 393 void set_follow_state PARAMS((enum SymlinkOption opt));
 394 void cleanup(void);
 395
 396 /* fstype.c */
 397 char *filesystem_type PARAMS((const struct stat *statp, const char *path));
 398 char * get_mounted_filesystems (void);
 399 dev_t * get_mounted_devices PARAMS((size_t *));
 400
 401
 402
 403 enum arg_type
 404   {
 405     ARG_OPTION,                 /* regular options like -maxdepth */
 406     ARG_POSITIONAL_OPTION,      /* options whose position is important (-follow) */
 407     ARG_TEST,                   /* a like -name */
 408     ARG_PUNCTUATION,            /* like -o or ( */
 409     ARG_ACTION                  /* like -print */
 410   };
 411
 412
 413 struct parser_table;
 414 /* Pointer to a parser function. */
 415 typedef boolean (*PARSE_FUNC)(const struct parser_table *p,
 416                               char *argv[], int *arg_ptr);
 417 struct parser_table
 418 {
 419   enum arg_type type;
 420   char *parser_name;
 421   PARSE_FUNC parser_func;
 422   PRED_FUNC    pred_func;
 423 };
 424
 425 /* parser.c */
 426 const struct parser_table* find_parser PARAMS((char *search_name));
 427 boolean parse_open  PARAMS((const struct parser_table* entry, char *argv[], int *arg_ptr));
 428 boolean parse_close PARAMS((const struct parser_table* entry, char *argv[], int *arg_ptr));
 429 boolean parse_print PARAMS((const struct parser_table*, char *argv[], int *arg_ptr));
 430 void pred_sanity_check PARAMS((const struct predicate *predicates));
 431 void parse_begin_user_args PARAMS((char **args, int argno, const struct predicate *last, const struct predicate *predicates));
 432 void parse_end_user_args PARAMS((char **args, int argno, const struct predicate *last, const struct predicate *predicates));
 433 boolean parse_openparen              PARAMS((const struct parser_table* entry, char *argv[], int *arg_ptr));
 434 boolean parse_closeparen             PARAMS((const struct parser_table* entry, char *argv[], int *arg_ptr));
 435
 436 /* pred.c */
 437 boolean pred_amin PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 438 boolean pred_and PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 439 boolean pred_anewer PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 440 boolean pred_atime PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 441 boolean pred_close PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 442 boolean pred_cmin PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 443 boolean pred_cnewer PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 444 boolean pred_comma PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 445 boolean pred_ctime PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 446 boolean pred_delete PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 447 boolean pred_empty PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 448 boolean pred_exec PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 449 boolean pred_execdir PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 450 boolean pred_executable PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 451 boolean pred_false PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 452 boolean pred_fls PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 453 boolean pred_fprint PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 454 boolean pred_fprint0 PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 455 boolean pred_fprintf PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 456 boolean pred_fstype PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 457 boolean pred_gid PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 458 boolean pred_group PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 459 boolean pred_ilname PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 460 boolean pred_iname PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 461 boolean pred_inum PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 462 boolean pred_ipath PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 463 boolean pred_links PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 464 boolean pred_lname PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 465 boolean pred_ls PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 466 boolean pred_mmin PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 467 boolean pred_mtime PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 468 boolean pred_name PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 469 boolean pred_negate PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 470 boolean pred_newer PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 471 boolean pred_nogroup PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 472 boolean pred_nouser PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 473 boolean pred_ok PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 474 boolean pred_okdir PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 475 boolean pred_open PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 476 boolean pred_or PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 477 boolean pred_path PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 478 boolean pred_perm PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 479 boolean pred_print PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 480 boolean pred_print0 PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 481 boolean pred_prune PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 482 boolean pred_quit PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 483 boolean pred_readable PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 484 boolean pred_regex PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 485 boolean pred_samefile PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 486 boolean pred_size PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 487 boolean pred_true PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 488 boolean pred_type PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 489 boolean pred_uid PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 490 boolean pred_used PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 491 boolean pred_user PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 492 boolean pred_writable PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 493 boolean pred_xtype PARAMS((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 494
 495
 496
 497 int launch PARAMS((const struct buildcmd_control *ctl,
 498                    struct buildcmd_state *buildstate));
 499
 500
 501 char *find_pred_name PARAMS((PRED_FUNC pred_func));
 502
 503
 504
 505 #ifdef DEBUG
 506 void print_tree PARAMS((FILE*, struct predicate *node, int indent));
 507 void print_list PARAMS((FILE*, struct predicate *node));
 508 void print_optlist PARAMS((FILE *fp, struct predicate *node));
 509 #endif /* DEBUG */
 510
 511 /* tree.c */
 512 struct predicate *
 513 get_expr PARAMS((struct predicate **input, short int prev_prec));
 514 boolean opt_expr PARAMS((struct predicate **eval_treep));
 515 boolean mark_stat PARAMS((struct predicate *tree));
 516 boolean mark_type PARAMS((struct predicate *tree));
 517
 518 /* util.c */
 519 struct predicate *get_new_pred PARAMS((const struct parser_table *entry));
 520 struct predicate *get_new_pred_chk_op PARAMS((const struct parser_table *entry));
 521 struct predicate *insert_primary PARAMS((const struct parser_table *entry));
 522 struct predicate *insert_primary_withpred PARAMS((const struct parser_table *entry, PRED_FUNC fptr));
 523 void usage PARAMS((char *msg));
 524 extern boolean check_nofollow(void);
 525 extern void complete_pending_execs(struct predicate *p);
 526 extern void complete_pending_execdirs(struct predicate *p);
 527 /* find.c. */
 528 int get_info PARAMS((const char *pathname, const char *name, struct stat *p, struct predicate *pred_ptr));
 529 int following_links(void);
 530 int digest_mode(mode_t mode, const char *pathname, const char *name, struct stat *pstat, boolean leaf);
 531 boolean default_prints (struct predicate *pred);
 532
 533
 534 struct options
 535 {
 536   /* If true, process directory before contents.  True unless -depth given. */
 537   boolean do_dir_first;
 538
 539   /* If >=0, don't descend more than this many levels of subdirectories. */
 540   int maxdepth;
 541
 542   /* If >=0, don't process files above this level. */
 543   int mindepth;
 544
 545   /* If true, do not assume that files in directories with nlink == 2
 546      are non-directories. */
 547   boolean no_leaf_check;
 548
 549   /* If true, don't cross filesystem boundaries. */
 550   boolean stay_on_filesystem;
 551
 552   /* If true, we ignore the problem where we find that a directory entry
 553    * no longer exists by the time we get around to processing it.
 554    */
 555   boolean ignore_readdir_race;
 556
 557   /* If true, pass control characters through.  If false, escape them
 558    * or turn them into harmless things.
 559    */
 560   boolean literal_control_chars;
 561
 562   /* If true, we issue warning messages
 563    */
 564   boolean warnings;
 565   time_t start_time;            /* Time at start of execution.  */
 566
 567   /* Seconds between 00:00 1/1/70 and either one day before now
 568      (the default), or the start of today (if -daystart is given). */
 569   time_t cur_day_start;
 570
 571   /* If true, cur_day_start has been adjusted to the start of the day. */
 572   boolean full_days;
 573
 574   int output_block_size;        /* Output block size.  */
 575
 576   enum SymlinkOption symlink_handling;
 577
 578
 579   /* Pointer to the function used to stat files. */
 580   int (*xstat) (const char *name, struct stat *statbuf);
 581
 582
 583   /* Indicate if we can implement safely_chdir() using the O_NOFOLLOW
 584    * flag to open(2).
 585    */
 586   boolean open_nofollow_available;
 587
 588   /* The variety of regular expression that we support.
 589    * The default is POSIX Basic Regular Expressions, but this
 590    * can be changed with the positional option, -regextype.
 591    */
 592   int regex_options;
 593 };
 594 extern struct options options;
 595
 596
 597 struct state
 598 {
 599   /* Current depth; 0 means current path is a command line arg. */
 600   int curdepth;
 601
 602   /* If true, we have called stat on the current path. */
 603   boolean have_stat;
 604
 605   /* If true, we know the type of the current path. */
 606   boolean have_type;
 607   mode_t type;                  /* this is the actual type */
 608
 609   /* The file being operated on, relative to the current directory.
 610      Used for stat, readlink, remove, and opendir.  */
 611   char *rel_pathname;
 612
 613   /* Length of starting path. */
 614   int starting_path_length;
 615
 616   /* If true, don't descend past current directory.
 617      Can be set by -prune, -maxdepth, and -xdev/-mount. */
 618   boolean stop_at_current_level;
 619
 620   /* Status value to return to system. */
 621   int exit_status;
 622 };
 623
 624 /* finddata.c */
 625 extern struct state state;
 626 extern char const *starting_dir;
 627 extern int starting_desc;
 628 extern struct predicate *eval_tree;
 629 extern char *program_name;
 630 extern struct predicate *predicates;
 631 extern struct predicate *last_pred;
 632
 633
 634 #endif