find/defs.h

   1 /* defs.h -- data types and declarations.
   2    Copyright (C) 1990, 91, 92, 93, 94 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #if defined(HAVE_STRING_H) || defined(STDC_HEADERS)
  19 #include <string.h>
  20 #else
  21 #include <strings.h>
  22 #ifndef strchr
  23 #define strchr index
  24 #endif
  25 #ifndef strrchr
  26 #define strrchr rindex
  27 #endif
  28 #endif
  29
  30 #include <errno.h>
  31 #ifndef errno
  32 extern int errno;
  33 #endif
  34
  35 #ifdef STDC_HEADERS
  36 #include <stdlib.h>
  37 #endif
  38
  39 #ifdef HAVE_UNISTD_H
  40 #include <unistd.h>
  41 #endif
  42
  43 #include <time.h>
  44
  45 #include "regex.h"
  46
  47 #if __STDC__
  48 # define P_(s) s
  49 #else
  50 # define P_(s) ()
  51 #endif
  52
  53 /* Not char because of type promotion; NeXT gcc can't handle it.  */
  54 typedef int boolean;
  55 #define         true    1
  56 #define         false   0
  57
  58 /* Pointer to function returning boolean. */
  59 typedef boolean (*PFB)();
  60
  61 /* The number of seconds in a day. */
  62 #define         DAYSECS     86400
  63
  64 /* Argument structures for predicates. */
  65
  66 enum comparison_type
  67 {
  68   COMP_GT,
  69   COMP_LT,
  70   COMP_EQ
  71 };
  72
  73 enum predicate_type
  74 {
  75   NO_TYPE,
  76   PRIMARY_TYPE,
  77   UNI_OP,
  78   BI_OP,
  79   OPEN_PAREN,
  80   CLOSE_PAREN
  81 };
  82
  83 enum predicate_precedence
  84 {
  85   NO_PREC,
  86   COMMA_PREC,
  87   OR_PREC,
  88   AND_PREC,
  89   NEGATE_PREC,
  90   MAX_PREC
  91 };
  92
  93 struct long_val
  94 {
  95   enum comparison_type kind;
  96   unsigned long l_val;
  97 };
  98
  99 struct size_val
 100 {
 101   enum comparison_type kind;
 102   int blocksize;
 103   unsigned long size;
 104 };
 105
 106 struct path_arg
 107 {
 108   short offset;                 /* Offset in `vec' of this arg. */
 109   short count;                  /* Number of path replacements in this arg. */
 110   char *origarg;                /* Arg with "{}" intact. */
 111 };
 112
 113 struct exec_val
 114 {
 115   struct path_arg *paths;       /* Array of args with path replacements. */
 116   char **vec;                   /* Array of args to pass to program. */
 117 };
 118
 119 /* The format string for a -printf or -fprintf is chopped into one or
 120    more `struct segment', linked together into a list.
 121    Each stretch of plain text is a segment, and
 122    each \c and `%' conversion is a segment. */
 123
 124 /* Special values for the `kind' field of `struct segment'. */
 125 #define KIND_PLAIN 0            /* Segment containing just plain text. */
 126 #define KIND_STOP 1             /* \c -- stop printing and flush output. */
 127
 128 struct segment
 129 {
 130   int kind;                     /* Format chars or KIND_{PLAIN,STOP}. */
 131   char *text;                   /* Plain text or `%' format string. */
 132   int text_len;                 /* Length of `text'. */
 133   struct segment *next;         /* Next segment for this predicate. */
 134 };
 135
 136 struct format_val
 137 {
 138   struct segment *segment;      /* Linked list of segments. */
 139   FILE *stream;                 /* Output stream to print on. */
 140 };
 141
 142 struct predicate
 143 {
 144   /* Pointer to the function that implements this predicate.  */
 145   PFB pred_func;
 146
 147   /* Only used for debugging, but defined unconditionally so individual
 148      modules can be compiled with -DDEBUG.  */
 149   char *p_name;
 150
 151   /* The type of this node.  There are two kinds.  The first is real
 152      predicates ("primaries") such as -perm, -print, or -exec.  The
 153      other kind is operators for combining predicates. */
 154   enum predicate_type p_type;
 155
 156   /* The precedence of this node.  Only has meaning for operators. */
 157   enum predicate_precedence p_prec;
 158
 159   /* True if this predicate node produces side effects. */
 160   boolean side_effects;
 161
 162   /* True if this predicate node requires a stat system call to execute. */
 163   boolean need_stat;
 164
 165   /* Information needed by the predicate processor.
 166      Next to each member are listed the predicates that use it. */
 167   union
 168   {
 169     char *str;                  /* fstype [i]lname [i]name [i]path */
 170     struct re_pattern_buffer *regex; /* regex */
 171     struct exec_val exec_vec;   /* exec ok */
 172     struct long_val info;       /* atime ctime mtime inum links */
 173     struct size_val size;       /* size */
 174     uid_t uid;                  /* user */
 175     gid_t gid;                  /* group */
 176     time_t time;                /* newer */
 177     unsigned long perm;         /* perm */
 178     unsigned long type;         /* type */
 179     FILE *stream;               /* fprint fprint0 */
 180     struct format_val printf_vec; /* printf fprintf */
 181   } args;
 182
 183   /* The next predicate in the user input sequence,
 184      which repesents the order in which the user supplied the
 185      predicates on the command line. */
 186   struct predicate *pred_next;
 187
 188   /* The right and left branches from this node in the expression
 189      tree, which represents the order in which the nodes should be
 190      processed. */
 191   struct predicate *pred_left;
 192   struct predicate *pred_right;
 193 };
 194
 195 /* find library function declarations.  */
 196
 197 /* dirname.c */
 198 char *dirname P_((char *path));
 199
 200 /* error.c */
 201 void error P_((int status, int errnum, char *message, ...));
 202
 203 /* listfile.c */
 204 void list_file P_((char *name, char *relname, struct stat *statp, FILE *stream));
 205 char *get_link_name P_((char *name, char *relname));
 206
 207 /* savedir.c */
 208 char *savedir P_((char *dir, unsigned name_size));
 209
 210 /* stpcpy.c */
 211 #if !HAVE_STPCPY
 212 char *stpcpy P_((char *dest, const char *src));
 213 #endif
 214
 215 /* xgetcwd.c */
 216 char *xgetcwd P_((void));
 217
 218 /* xmalloc.c */
 219 #if __STDC__
 220 #define VOID void
 221 #else
 222 #define VOID char
 223 #endif
 224
 225 VOID *xmalloc P_((size_t n));
 226 VOID *xrealloc P_((VOID *p, size_t n));
 227
 228 /* xstrdup.c */
 229 char *xstrdup P_((char *string));
 230
 231 /* find global function declarations.  */
 232
 233 /* fstype.c */
 234 char *filesystem_type P_((char *path, char *relpath, struct stat *statp));
 235
 236 /* parser.c */
 237 PFB find_parser P_((char *search_name));
 238 boolean parse_close P_((char *argv[], int *arg_ptr));
 239 boolean parse_open P_((char *argv[], int *arg_ptr));
 240 boolean parse_print P_((char *argv[], int *arg_ptr));
 241
 242 /* pred.c */
 243 boolean pred_amin P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 244 boolean pred_and P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 245 boolean pred_anewer P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 246 boolean pred_atime P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 247 boolean pred_close P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 248 boolean pred_cmin P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 249 boolean pred_cnewer P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 250 boolean pred_comma P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 251 boolean pred_ctime P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 252 boolean pred_empty P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 253 boolean pred_exec P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 254 boolean pred_false P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 255 boolean pred_fls P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 256 boolean pred_fprint P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 257 boolean pred_fprint0 P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 258 boolean pred_fprintf P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 259 boolean pred_fstype P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 260 boolean pred_gid P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 261 boolean pred_group P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 262 boolean pred_ilname P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 263 boolean pred_iname P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 264 boolean pred_inum P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 265 boolean pred_ipath P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 266 boolean pred_links P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 267 boolean pred_lname P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 268 boolean pred_ls P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 269 boolean pred_mmin P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 270 boolean pred_mtime P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 271 boolean pred_name P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 272 boolean pred_negate P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 273 boolean pred_newer P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 274 boolean pred_nogroup P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 275 boolean pred_nouser P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 276 boolean pred_ok P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 277 boolean pred_open P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 278 boolean pred_or P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 279 boolean pred_path P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 280 boolean pred_perm P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 281 boolean pred_print P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 282 boolean pred_print0 P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 283 boolean pred_prune P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 284 boolean pred_regex P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 285 boolean pred_size P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 286 boolean pred_true P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 287 boolean pred_type P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 288 boolean pred_uid P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 289 boolean pred_used P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 290 boolean pred_user P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 291 boolean pred_xtype P_((char *pathname, struct stat *stat_buf, struct predicate *pred_ptr));
 292 char *find_pred_name P_((PFB pred_func));
 293 #ifdef DEBUG
 294 void print_tree P_((struct predicate *node, int indent));
 295 void print_list P_((struct predicate *node));
 296 #endif /* DEBUG */
 297
 298 /* tree.c */
 299 struct predicate *get_expr P_((struct predicate **input, int prev_prec));
 300 boolean opt_expr P_((struct predicate **eval_treep));
 301 boolean mark_stat P_((struct predicate *tree));
 302
 303 /* util.c */
 304 char *basename P_((char *fname));
 305 struct predicate *get_new_pred P_((void));
 306 struct predicate *get_new_pred_chk_op P_((void));
 307 struct predicate *insert_primary P_((boolean (*pred_func )()));
 308 void usage P_((char *msg));
 309
 310 extern char *program_name;
 311 extern struct predicate *predicates;
 312 extern struct predicate *last_pred;
 313 extern boolean do_dir_first;
 314 extern int maxdepth;
 315 extern int mindepth;
 316 extern int curdepth;
 317 extern time_t cur_day_start;
 318 extern boolean full_days;
 319 extern boolean no_leaf_check;
 320 extern boolean stay_on_filesystem;
 321 extern boolean stop_at_current_level;
 322 extern boolean have_stat;
 323 extern char *rel_pathname;
 324 #ifndef HAVE_FCHDIR
 325 extern char *starting_dir;
 326 #else
 327 extern int starting_desc;
 328 #endif
 329 extern int exit_status;
 330 extern int path_length;
 331 extern int (*xstat) ();
 332 extern boolean dereference;