LXR busybox/findutils/find.c

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * Mini find implementation for busybox
   4 *
   5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6 *
   7 * Reworked by David Douthitt <n9ubh@callsign.net> and
   8 *  Matt Kraai <kraai@alumni.carnegiemellon.edu>.
   9 *
  10 * Licensed under the GPL version 2, see the file LICENSE in this tarball.
  11 */
  12
  13/* findutils-4.1.20:
  14 *
  15 * # find file.txt -exec 'echo {}' '{}  {}' ';'
  16 * find: echo file.txt: No such file or directory
  17 * # find file.txt -exec 'echo' '{}  {}' '; '
  18 * find: missing argument to `-exec'
  19 * # find file.txt -exec 'echo {}' '{}  {}' ';' junk
  20 * find: paths must precede expression
  21 * # find file.txt -exec 'echo {}' '{}  {}' ';' junk ';'
  22 * find: paths must precede expression
  23 * # find file.txt -exec 'echo' '{}  {}' ';'
  24 * file.txt  file.txt
  25 * (strace: execve("/bin/echo", ["echo", "file.txt  file.txt"], [ 30 vars ]))
  26 * # find file.txt -exec 'echo' '{}  {}' ';' -print -exec pwd ';'
  27 * file.txt  file.txt
  28 * file.txt
  29 * /tmp
  30 * # find -name '*.c' -o -name '*.h'
  31 * [shows files, *.c and *.h intermixed]
  32 * # find file.txt -name '*f*' -o -name '*t*'
  33 * file.txt
  34 * # find file.txt -name '*z*' -o -name '*t*'
  35 * file.txt
  36 * # find file.txt -name '*f*' -o -name '*z*'
  37 * file.txt
  38 *
  39 * # find t z -name '*t*' -print -o -name '*z*'
  40 * t
  41 * # find t z t z -name '*t*' -o -name '*z*' -print
  42 * z
  43 * z
  44 * # find t z t z '(' -name '*t*' -o -name '*z*' ')' -o -print
  45 * (no output)
  46 */
  47
  48/* Testing script
  49 * ./busybox find "$@" | tee /tmp/bb_find
  50 * echo ==================
  51 * /path/to/gnu/find "$@" | tee /tmp/std_find
  52 * echo ==================
  53 * diff -u /tmp/std_find /tmp/bb_find && echo Identical
  54 */
  55
  56#include <fnmatch.h>
  57#include "libbb.h"
  58#if ENABLE_FEATURE_FIND_REGEX
  59#include "xregex.h"
  60#endif
  61
  62/* This is a NOEXEC applet. Be very careful! */
  63
  64
  65USE_FEATURE_FIND_XDEV(static dev_t *xdev_dev;)
  66USE_FEATURE_FIND_XDEV(static int xdev_count;)
  67
  68typedef int (*action_fp)(const char *fileName, struct stat *statbuf, void *);
  69
  70typedef struct {
  71        action_fp f;
  72#if ENABLE_FEATURE_FIND_NOT
  73        bool invert;
  74#endif
  75} action;
  76#define ACTS(name, arg...) typedef struct { action a; arg; } action_##name;
  77#define ACTF(name)         static int func_##name(const char *fileName UNUSED_PARAM, \
  78                                                  struct stat *statbuf UNUSED_PARAM, \
  79                                                  action_##name* ap UNUSED_PARAM)
  80                         ACTS(print)
  81                         ACTS(name,  const char *pattern; bool iname;)
  82USE_FEATURE_FIND_PATH(   ACTS(path,  const char *pattern;))
  83USE_FEATURE_FIND_REGEX(  ACTS(regex, regex_t compiled_pattern;))
  84USE_FEATURE_FIND_PRINT0( ACTS(print0))
  85USE_FEATURE_FIND_TYPE(   ACTS(type,  int type_mask;))
  86USE_FEATURE_FIND_PERM(   ACTS(perm,  char perm_char; mode_t perm_mask;))
  87USE_FEATURE_FIND_MTIME(  ACTS(mtime, char mtime_char; unsigned mtime_days;))
  88USE_FEATURE_FIND_MMIN(   ACTS(mmin,  char mmin_char; unsigned mmin_mins;))
  89USE_FEATURE_FIND_NEWER(  ACTS(newer, time_t newer_mtime;))
  90USE_FEATURE_FIND_INUM(   ACTS(inum,  ino_t inode_num;))
  91USE_FEATURE_FIND_USER(   ACTS(user,  uid_t uid;))
  92USE_FEATURE_FIND_SIZE(   ACTS(size,  char size_char; off_t size;))
  93USE_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
  94USE_FEATURE_FIND_PAREN(  ACTS(paren, action ***subexpr;))
  95USE_FEATURE_FIND_PRUNE(  ACTS(prune))
  96USE_FEATURE_FIND_DELETE( ACTS(delete))
  97USE_FEATURE_FIND_EXEC(   ACTS(exec,  char **exec_argv; unsigned *subst_count; int exec_argc;))
  98USE_FEATURE_FIND_GROUP(  ACTS(group, gid_t gid;))
  99
 100static action ***actions;
 101static bool need_print = 1;
 102static int recurse_flags = ACTION_RECURSE;
 103
 104#if ENABLE_FEATURE_FIND_EXEC
 105static unsigned count_subst(const char *str)
 106{
 107        unsigned count = 0;
 108        while ((str = strstr(str, "{}")) != NULL) {
 109                count++;
 110                str++;
 111        }
 112        return count;
 113}
 114
 115
 116static char* subst(const char *src, unsigned count, const char* filename)
 117{
 118        char *buf, *dst, *end;
 119        size_t flen = strlen(filename);
 120        /* we replace each '{}' with filename: growth by strlen-2 */
 121        buf = dst = xmalloc(strlen(src) + count*(flen-2) + 1);
 122        while ((end = strstr(src, "{}"))) {
 123                memcpy(dst, src, end - src);
 124                dst += end - src;
 125                src = end + 2;
 126                memcpy(dst, filename, flen);
 127                dst += flen;
 128        }
 129        strcpy(dst, src);
 130        return buf;
 131}
 132#endif
 133
 134/* Return values of ACTFs ('action functions') are a bit mask:
 135 * bit 1=1: prune (use SKIP constant for setting it)
 136 * bit 0=1: matched successfully (TRUE)
 137 */
 138
 139static int exec_actions(action ***appp, const char *fileName, struct stat *statbuf)
 140{
 141        int cur_group;
 142        int cur_action;
 143        int rc = 0;
 144        action **app, *ap;
 145
 146        /* "action group" is a set of actions ANDed together.
 147         * groups are ORed together.
 148         * We simply evaluate each group until we find one in which all actions
 149         * succeed. */
 150
 151        /* -prune is special: if it is encountered, then we won't
 152         * descend into current directory. It doesn't matter whether
 153         * action group (in which -prune sits) will succeed or not:
 154         * find * -prune -name 'f*' -o -name 'm*' -- prunes every dir
 155         * find * -name 'f*' -o -prune -name 'm*' -- prunes all dirs
 156         *     not starting with 'f' */
 157
 158        /* We invert TRUE bit (bit 0). Now 1 there means 'failure'.
 159         * and bitwise OR in "rc |= TRUE ^ ap->f()" will:
 160         * (1) make SKIP (-prune) bit stick; and (2) detect 'failure'.
 161         * On return, bit is restored.  */
 162
 163        cur_group = -1;
 164        while ((app = appp[++cur_group])) {
 165                rc &= ~TRUE; /* 'success' so far, clear TRUE bit */
 166                cur_action = -1;
 167                while (1) {
 168                        ap = app[++cur_action];
 169                        if (!ap) /* all actions in group were successful */
 170                                return rc ^ TRUE; /* restore TRUE bit */
 171                        rc |= TRUE ^ ap->f(fileName, statbuf, ap);
 172#if ENABLE_FEATURE_FIND_NOT
 173                        if (ap->invert) rc ^= TRUE;
 174#endif
 175                        if (rc & TRUE) /* current group failed, try next */
 176                                break;
 177                }
 178        }
 179        return rc ^ TRUE; /* restore TRUE bit */
 180}
 181
 182
 183ACTF(name)
 184{
 185        const char *tmp = bb_basename(fileName);
 186        if (tmp != fileName && !*tmp) { /* "foo/bar/". Oh no... go back to 'b' */
 187                tmp--;
 188                while (tmp != fileName && *--tmp != '/')
 189                        continue;
 190                if (*tmp == '/')
 191                        tmp++;
 192        }
 193        return fnmatch(ap->pattern, tmp, FNM_PERIOD | (ap->iname ? FNM_CASEFOLD : 0)) == 0;
 194}
 195
 196#if ENABLE_FEATURE_FIND_PATH
 197ACTF(path)
 198{
 199        return fnmatch(ap->pattern, fileName, 0) == 0;
 200}
 201#endif
 202#if ENABLE_FEATURE_FIND_REGEX
 203ACTF(regex)
 204{
 205        regmatch_t match;
 206        if (regexec(&ap->compiled_pattern, fileName, 1, &match, 0 /*eflags*/))
 207                return 0; /* no match */
 208        if (match.rm_so)
 209                return 0; /* match doesn't start at pos 0 */
 210        if (fileName[match.rm_eo])
 211                return 0; /* match doesn't end exactly at end of pathname */
 212        return 1;
 213}
 214#endif
 215#if ENABLE_FEATURE_FIND_TYPE
 216ACTF(type)
 217{
 218        return ((statbuf->st_mode & S_IFMT) == ap->type_mask);
 219}
 220#endif
 221#if ENABLE_FEATURE_FIND_PERM
 222ACTF(perm)
 223{
 224        /* -perm +mode: at least one of perm_mask bits are set */
 225        if (ap->perm_char == '+')
 226                return (statbuf->st_mode & ap->perm_mask) != 0;
 227        /* -perm -mode: all of perm_mask are set */
 228        if (ap->perm_char == '-')
 229                return (statbuf->st_mode & ap->perm_mask) == ap->perm_mask;
 230        /* -perm mode: file mode must match perm_mask */
 231        return (statbuf->st_mode & 07777) == ap->perm_mask;
 232}
 233#endif
 234#if ENABLE_FEATURE_FIND_MTIME
 235ACTF(mtime)
 236{
 237        time_t file_age = time(NULL) - statbuf->st_mtime;
 238        time_t mtime_secs = ap->mtime_days * 24*60*60;
 239        if (ap->mtime_char == '+')
 240                return file_age >= mtime_secs + 24*60*60;
 241        if (ap->mtime_char == '-')
 242                return file_age < mtime_secs;
 243        /* just numeric mtime */
 244        return file_age >= mtime_secs && file_age < (mtime_secs + 24*60*60);
 245}
 246#endif
 247#if ENABLE_FEATURE_FIND_MMIN
 248ACTF(mmin)
 249{
 250        time_t file_age = time(NULL) - statbuf->st_mtime;
 251        time_t mmin_secs = ap->mmin_mins * 60;
 252        if (ap->mmin_char == '+')
 253                return file_age >= mmin_secs + 60;
 254        if (ap->mmin_char == '-')
 255                return file_age < mmin_secs;
 256        /* just numeric mmin */
 257        return file_age >= mmin_secs && file_age < (mmin_secs + 60);
 258}
 259#endif
 260#if ENABLE_FEATURE_FIND_NEWER
 261ACTF(newer)
 262{
 263        return (ap->newer_mtime < statbuf->st_mtime);
 264}
 265#endif
 266#if ENABLE_FEATURE_FIND_INUM
 267ACTF(inum)
 268{
 269        return (statbuf->st_ino == ap->inode_num);
 270}
 271#endif
 272#if ENABLE_FEATURE_FIND_EXEC
 273ACTF(exec)
 274{
 275        int i, rc;
 276        char *argv[ap->exec_argc + 1];
 277        for (i = 0; i < ap->exec_argc; i++)
 278                argv[i] = subst(ap->exec_argv[i], ap->subst_count[i], fileName);
 279        argv[i] = NULL; /* terminate the list */
 280
 281        rc = spawn_and_wait(argv);
 282        if (rc < 0)
 283                bb_simple_perror_msg(argv[0]);
 284
 285        i = 0;
 286        while (argv[i])
 287                free(argv[i++]);
 288        return rc == 0; /* return 1 if exitcode 0 */
 289}
 290#endif
 291#if ENABLE_FEATURE_FIND_USER
 292ACTF(user)
 293{
 294        return (statbuf->st_uid == ap->uid);
 295}
 296#endif
 297#if ENABLE_FEATURE_FIND_GROUP
 298ACTF(group)
 299{
 300        return (statbuf->st_gid == ap->gid);
 301}
 302#endif
 303#if ENABLE_FEATURE_FIND_PRINT0
 304ACTF(print0)
 305{
 306        printf("%s%c", fileName, '\0');
 307        return TRUE;
 308}
 309#endif
 310ACTF(print)
 311{
 312        puts(fileName);
 313        return TRUE;
 314}
 315#if ENABLE_FEATURE_FIND_PAREN
 316ACTF(paren)
 317{
 318        return exec_actions(ap->subexpr, fileName, statbuf);
 319}
 320#endif
 321#if ENABLE_FEATURE_FIND_SIZE
 322ACTF(size)
 323{
 324        if (ap->size_char == '+')
 325                return statbuf->st_size > ap->size;
 326        if (ap->size_char == '-')
 327                return statbuf->st_size < ap->size;
 328        return statbuf->st_size == ap->size;
 329}
 330#endif
 331#if ENABLE_FEATURE_FIND_PRUNE
 332/*
 333 * -prune: if -depth is not given, return true and do not descend
 334 * current dir; if -depth is given, return false with no effect.
 335 * Example:
 336 * find dir -name 'asm-*' -prune -o -name '*.[chS]' -print
 337 */
 338ACTF(prune)
 339{
 340        return SKIP + TRUE;
 341}
 342#endif
 343#if ENABLE_FEATURE_FIND_DELETE
 344ACTF(delete)
 345{
 346        int rc;
 347        if (S_ISDIR(statbuf->st_mode)) {
 348                rc = rmdir(fileName);
 349        } else {
 350                rc = unlink(fileName);
 351        }
 352        if (rc < 0)
 353                bb_simple_perror_msg(fileName);
 354        return TRUE;
 355}
 356#endif
 357#if ENABLE_FEATURE_FIND_CONTEXT
 358ACTF(context)
 359{
 360        security_context_t con;
 361        int rc;
 362
 363        if (recurse_flags & ACTION_FOLLOWLINKS) {
 364                rc = getfilecon(fileName, &con);
 365        } else {
 366                rc = lgetfilecon(fileName, &con);
 367        }
 368        if (rc < 0)
 369                return FALSE;
 370        rc = strcmp(ap->context, con);
 371        freecon(con);
 372        return rc == 0;
 373}
 374#endif
 375
 376
 377static int FAST_FUNC fileAction(const char *fileName,
 378                struct stat *statbuf,
 379                void *userData SKIP_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM),
 380                int depth SKIP_FEATURE_FIND_MAXDEPTH(UNUSED_PARAM))
 381{
 382        int i;
 383#if ENABLE_FEATURE_FIND_MAXDEPTH
 384#define minmaxdepth ((int*)userData)
 385
 386        if (depth < minmaxdepth[0]) return TRUE;
 387        if (depth > minmaxdepth[1]) return SKIP;
 388#undef minmaxdepth
 389#endif
 390
 391#if ENABLE_FEATURE_FIND_XDEV
 392        if (S_ISDIR(statbuf->st_mode) && xdev_count) {
 393                for (i = 0; i < xdev_count; i++) {
 394                        if (xdev_dev[i] == statbuf->st_dev)
 395                                break;
 396                }
 397                if (i == xdev_count)
 398                        return SKIP;
 399        }
 400#endif
 401        i = exec_actions(actions, fileName, statbuf);
 402        /* Had no explicit -print[0] or -exec? then print */
 403        if ((i & TRUE) && need_print)
 404                puts(fileName);
 405        /* Cannot return 0: our caller, recursive_action(),
 406         * will perror() and skip dirs (if called on dir) */
 407        return (i & SKIP) ? SKIP : TRUE;
 408}
 409
 410
 411#if ENABLE_FEATURE_FIND_TYPE
 412static int find_type(const char *type)
 413{
 414        int mask = 0;
 415
 416        if (*type == 'b')
 417                mask = S_IFBLK;
 418        else if (*type == 'c')
 419                mask = S_IFCHR;
 420        else if (*type == 'd')
 421                mask = S_IFDIR;
 422        else if (*type == 'p')
 423                mask = S_IFIFO;
 424        else if (*type == 'f')
 425                mask = S_IFREG;
 426        else if (*type == 'l')
 427                mask = S_IFLNK;
 428        else if (*type == 's')
 429                mask = S_IFSOCK;
 430
 431        if (mask == 0 || *(type + 1) != '\0')
 432                bb_error_msg_and_die(bb_msg_invalid_arg, type, "-type");
 433
 434        return mask;
 435}
 436#endif
 437
 438#if ENABLE_FEATURE_FIND_PERM \
 439 || ENABLE_FEATURE_FIND_MTIME || ENABLE_FEATURE_FIND_MMIN \
 440 || ENABLE_FEATURE_FIND_SIZE
 441static const char* plus_minus_num(const char* str)
 442{
 443        if (*str == '-' || *str == '+')
 444                str++;
 445        return str;
 446}
 447#endif
 448
 449static action*** parse_params(char **argv)
 450{
 451        enum {
 452                                 PARM_a         ,
 453                                 PARM_o         ,
 454        USE_FEATURE_FIND_NOT(    PARM_char_not  ,)
 455#if ENABLE_DESKTOP
 456                                 PARM_and       ,
 457                                 PARM_or        ,
 458        USE_FEATURE_FIND_NOT(    PARM_not       ,)
 459#endif
 460                                 PARM_print     ,
 461        USE_FEATURE_FIND_PRINT0( PARM_print0    ,)
 462        USE_FEATURE_FIND_DEPTH(  PARM_depth     ,)
 463        USE_FEATURE_FIND_PRUNE(  PARM_prune     ,)
 464        USE_FEATURE_FIND_DELETE( PARM_delete    ,)
 465        USE_FEATURE_FIND_EXEC(   PARM_exec      ,)
 466        USE_FEATURE_FIND_PAREN(  PARM_char_brace,)
 467        /* All options starting from here require argument */
 468                                 PARM_name      ,
 469                                 PARM_iname     ,
 470        USE_FEATURE_FIND_PATH(   PARM_path      ,)
 471        USE_FEATURE_FIND_REGEX(  PARM_regex     ,)
 472        USE_FEATURE_FIND_TYPE(   PARM_type      ,)
 473        USE_FEATURE_FIND_PERM(   PARM_perm      ,)
 474        USE_FEATURE_FIND_MTIME(  PARM_mtime     ,)
 475        USE_FEATURE_FIND_MMIN(   PARM_mmin      ,)
 476        USE_FEATURE_FIND_NEWER(  PARM_newer     ,)
 477        USE_FEATURE_FIND_INUM(   PARM_inum      ,)
 478        USE_FEATURE_FIND_USER(   PARM_user      ,)
 479        USE_FEATURE_FIND_GROUP(  PARM_group     ,)
 480        USE_FEATURE_FIND_SIZE(   PARM_size      ,)
 481        USE_FEATURE_FIND_CONTEXT(PARM_context   ,)
 482        };
 483
 484        static const char params[] ALIGN1 =
 485                                 "-a\0"
 486                                 "-o\0"
 487        USE_FEATURE_FIND_NOT(    "!\0"       )
 488#if ENABLE_DESKTOP
 489                                 "-and\0"
 490                                 "-or\0"
 491        USE_FEATURE_FIND_NOT(    "-not\0"    )
 492#endif
 493                                 "-print\0"
 494        USE_FEATURE_FIND_PRINT0( "-print0\0" )
 495        USE_FEATURE_FIND_DEPTH(  "-depth\0"  )
 496        USE_FEATURE_FIND_PRUNE(  "-prune\0"  )
 497        USE_FEATURE_FIND_DELETE( "-delete\0" )
 498        USE_FEATURE_FIND_EXEC(   "-exec\0"   )
 499        USE_FEATURE_FIND_PAREN(  "(\0"       )
 500        /* All options starting from here require argument */
 501                                 "-name\0"
 502                                 "-iname\0"
 503        USE_FEATURE_FIND_PATH(   "-path\0"   )
 504        USE_FEATURE_FIND_REGEX(  "-regex\0"  )
 505        USE_FEATURE_FIND_TYPE(   "-type\0"   )
 506        USE_FEATURE_FIND_PERM(   "-perm\0"   )
 507        USE_FEATURE_FIND_MTIME(  "-mtime\0"  )
 508        USE_FEATURE_FIND_MMIN(   "-mmin\0"   )
 509        USE_FEATURE_FIND_NEWER(  "-newer\0"  )
 510        USE_FEATURE_FIND_INUM(   "-inum\0"   )
 511        USE_FEATURE_FIND_USER(   "-user\0"   )
 512        USE_FEATURE_FIND_GROUP(  "-group\0"  )
 513        USE_FEATURE_FIND_SIZE(   "-size\0"   )
 514        USE_FEATURE_FIND_CONTEXT("-context\0")
 515                                 ;
 516
 517        action*** appp;
 518        unsigned cur_group = 0;
 519        unsigned cur_action = 0;
 520        USE_FEATURE_FIND_NOT( bool invert_flag = 0; )
 521
 522        /* This is the only place in busybox where we use nested function.
 523         * So far more standard alternatives were bigger. */
 524        /* Suppress a warning "func without a prototype" */
 525        auto action* alloc_action(int sizeof_struct, action_fp f);
 526        action* alloc_action(int sizeof_struct, action_fp f)
 527        {
 528                action *ap;
 529                appp[cur_group] = xrealloc(appp[cur_group], (cur_action+2) * sizeof(*appp));
 530                appp[cur_group][cur_action++] = ap = xmalloc(sizeof_struct);
 531                appp[cur_group][cur_action] = NULL;
 532                ap->f = f;
 533                USE_FEATURE_FIND_NOT( ap->invert = invert_flag; )
 534                USE_FEATURE_FIND_NOT( invert_flag = 0; )
 535                return ap;
 536        }
 537
 538#define ALLOC_ACTION(name) (action_##name*)alloc_action(sizeof(action_##name), (action_fp) func_##name)
 539
 540        appp = xzalloc(2 * sizeof(appp[0])); /* appp[0],[1] == NULL */
 541
 542/* Actions have side effects and return a true or false value
 543 * We implement: -print, -print0, -exec
 544 *
 545 * The rest are tests.
 546 *
 547 * Tests and actions are grouped by operators
 548 * ( expr )              Force precedence
 549 * ! expr                True if expr is false
 550 * -not expr             Same as ! expr
 551 * expr1 [-a[nd]] expr2  And; expr2 is not evaluated if expr1 is false
 552 * expr1 -o[r] expr2     Or; expr2 is not evaluated if expr1 is true
 553 * expr1 , expr2         List; both expr1 and expr2 are always evaluated
 554 * We implement: (), -a, -o
 555 */
 556        while (*argv) {
 557                const char *arg = argv[0];
 558                int parm = index_in_strings(params, arg);
 559                const char *arg1 = argv[1];
 560
 561                if (parm >= PARM_name) {
 562                        /* All options starting from -name require argument */
 563                        if (!arg1)
 564                                bb_error_msg_and_die(bb_msg_requires_arg, arg);
 565                        argv++;
 566                }
 567
 568                /* We can use big switch() here, but on i386
 569                 * it doesn't give smaller code. Other arches? */
 570
 571        /* --- Operators --- */
 572                if (parm == PARM_a USE_DESKTOP(|| parm == PARM_and)) {
 573                        /* no further special handling required */
 574                }
 575                else if (parm == PARM_o USE_DESKTOP(|| parm == PARM_or)) {
 576                        /* start new OR group */
 577                        cur_group++;
 578                        appp = xrealloc(appp, (cur_group+2) * sizeof(*appp));
 579                        /*appp[cur_group] = NULL; - already NULL */
 580                        appp[cur_group+1] = NULL;
 581                        cur_action = 0;
 582                }
 583#if ENABLE_FEATURE_FIND_NOT
 584                else if (parm == PARM_char_not USE_DESKTOP(|| parm == PARM_not)) {
 585                        /* also handles "find ! ! -name 'foo*'" */
 586                        invert_flag ^= 1;
 587                }
 588#endif
 589
 590        /* --- Tests and actions --- */
 591                else if (parm == PARM_print) {
 592                        need_print = 0;
 593                        /* GNU find ignores '!' here: "find ! -print" */
 594                        USE_FEATURE_FIND_NOT( invert_flag = 0; )
 595                        (void) ALLOC_ACTION(print);
 596                }
 597#if ENABLE_FEATURE_FIND_PRINT0
 598                else if (parm == PARM_print0) {
 599                        need_print = 0;
 600                        USE_FEATURE_FIND_NOT( invert_flag = 0; )
 601                        (void) ALLOC_ACTION(print0);
 602                }
 603#endif
 604#if ENABLE_FEATURE_FIND_DEPTH
 605                else if (parm == PARM_depth) {
 606                        recurse_flags |= ACTION_DEPTHFIRST;
 607                }
 608#endif
 609#if ENABLE_FEATURE_FIND_PRUNE
 610                else if (parm == PARM_prune) {
 611                        USE_FEATURE_FIND_NOT( invert_flag = 0; )
 612                        (void) ALLOC_ACTION(prune);
 613                }
 614#endif
 615#if ENABLE_FEATURE_FIND_DELETE
 616                else if (parm == PARM_delete) {
 617                        need_print = 0;
 618                        recurse_flags |= ACTION_DEPTHFIRST;
 619                        (void) ALLOC_ACTION(delete);
 620                }
 621#endif
 622#if ENABLE_FEATURE_FIND_EXEC
 623                else if (parm == PARM_exec) {
 624                        int i;
 625                        action_exec *ap;
 626                        need_print = 0;
 627                        USE_FEATURE_FIND_NOT( invert_flag = 0; )
 628                        ap = ALLOC_ACTION(exec);
 629                        ap->exec_argv = ++argv; /* first arg after -exec */
 630                        ap->exec_argc = 0;
 631                        while (1) {
 632                                if (!*argv) /* did not see ';' until end */
 633                                        bb_error_msg_and_die("-exec CMD must end by ';'");
 634                                if (LONE_CHAR(argv[0], ';'))
 635                                        break;
 636                                argv++;
 637                                ap->exec_argc++;
 638                        }
 639                        if (ap->exec_argc == 0)
 640                                bb_error_msg_and_die(bb_msg_requires_arg, arg);
 641                        ap->subst_count = xmalloc(ap->exec_argc * sizeof(int));
 642                        i = ap->exec_argc;
 643                        while (i--)
 644                                ap->subst_count[i] = count_subst(ap->exec_argv[i]);
 645                }
 646#endif
 647#if ENABLE_FEATURE_FIND_PAREN
 648                else if (parm == PARM_char_brace) {
 649                        action_paren *ap;
 650                        char **endarg;
 651                        unsigned nested = 1;
 652
 653                        endarg = argv;
 654                        while (1) {
 655                                if (!*++endarg)
 656                                        bb_error_msg_and_die("unpaired '('");
 657                                if (LONE_CHAR(*endarg, '('))
 658                                        nested++;
 659                                else if (LONE_CHAR(*endarg, ')') && !--nested) {
 660                                        *endarg = NULL;
 661                                        break;
 662                                }
 663                        }
 664                        ap = ALLOC_ACTION(paren);
 665                        ap->subexpr = parse_params(argv + 1);
 666                        *endarg = (char*) ")"; /* restore NULLed parameter */
 667                        argv = endarg;
 668                }
 669#endif
 670                else if (parm == PARM_name || parm == PARM_iname) {
 671                        action_name *ap;
 672                        ap = ALLOC_ACTION(name);
 673                        ap->pattern = arg1;
 674                        ap->iname = (parm == PARM_iname);
 675                }
 676#if ENABLE_FEATURE_FIND_PATH
 677                else if (parm == PARM_path) {
 678                        action_path *ap;
 679                        ap = ALLOC_ACTION(path);
 680                        ap->pattern = arg1;
 681                }
 682#endif
 683#if ENABLE_FEATURE_FIND_REGEX
 684                else if (parm == PARM_regex) {
 685                        action_regex *ap;
 686                        ap = ALLOC_ACTION(regex);
 687                        xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
 688                }
 689#endif
 690#if ENABLE_FEATURE_FIND_TYPE
 691                else if (parm == PARM_type) {
 692                        action_type *ap;
 693                        ap = ALLOC_ACTION(type);
 694                        ap->type_mask = find_type(arg1);
 695                }
 696#endif
 697#if ENABLE_FEATURE_FIND_PERM
 698/* -perm mode   File's permission bits are exactly mode (octal or symbolic).
 699 *              Symbolic modes use mode 0 as a point of departure.
 700 * -perm -mode  All of the permission bits mode are set for the file.
 701 * -perm +mode  Any of the permission bits mode are set for the file.
 702 */
 703                else if (parm == PARM_perm) {
 704                        action_perm *ap;
 705                        ap = ALLOC_ACTION(perm);
 706                        ap->perm_char = arg1[0];
 707                        arg1 = plus_minus_num(arg1);
 708                        ap->perm_mask = 0;
 709                        if (!bb_parse_mode(arg1, &ap->perm_mask))
 710                                bb_error_msg_and_die("invalid mode: %s", arg1);
 711                }
 712#endif
 713#if ENABLE_FEATURE_FIND_MTIME
 714                else if (parm == PARM_mtime) {
 715                        action_mtime *ap;
 716                        ap = ALLOC_ACTION(mtime);
 717                        ap->mtime_char = arg1[0];
 718                        ap->mtime_days = xatoul(plus_minus_num(arg1));
 719                }
 720#endif
 721#if ENABLE_FEATURE_FIND_MMIN
 722                else if (parm == PARM_mmin) {
 723                        action_mmin *ap;
 724                        ap = ALLOC_ACTION(mmin);
 725                        ap->mmin_char = arg1[0];
 726                        ap->mmin_mins = xatoul(plus_minus_num(arg1));
 727                }
 728#endif
 729#if ENABLE_FEATURE_FIND_NEWER
 730                else if (parm == PARM_newer) {
 731                        struct stat stat_newer;
 732                        action_newer *ap;
 733                        ap = ALLOC_ACTION(newer);
 734                        xstat(arg1, &stat_newer);
 735                        ap->newer_mtime = stat_newer.st_mtime;
 736                }
 737#endif
 738#if ENABLE_FEATURE_FIND_INUM
 739                else if (parm == PARM_inum) {
 740                        action_inum *ap;
 741                        ap = ALLOC_ACTION(inum);
 742                        ap->inode_num = xatoul(arg1);
 743                }
 744#endif
 745#if ENABLE_FEATURE_FIND_USER
 746                else if (parm == PARM_user) {
 747                        action_user *ap;
 748                        ap = ALLOC_ACTION(user);
 749                        ap->uid = bb_strtou(arg1, NULL, 10);
 750                        if (errno)
 751                                ap->uid = xuname2uid(arg1);
 752                }
 753#endif
 754#if ENABLE_FEATURE_FIND_GROUP
 755                else if (parm == PARM_group) {
 756                        action_group *ap;
 757                        ap = ALLOC_ACTION(group);
 758                        ap->gid = bb_strtou(arg1, NULL, 10);
 759                        if (errno)
 760                                ap->gid = xgroup2gid(arg1);
 761                }
 762#endif
 763#if ENABLE_FEATURE_FIND_SIZE
 764                else if (parm == PARM_size) {
 765/* -size n[bckw]: file uses n units of space
 766 * b (default): units are 512-byte blocks
 767 * c: 1 byte
 768 * k: kilobytes
 769 * w: 2-byte words
 770 */
 771#if ENABLE_LFS
 772#define XATOU_SFX xatoull_sfx
 773#else
 774#define XATOU_SFX xatoul_sfx
 775#endif
 776                        static const struct suffix_mult find_suffixes[] = {
 777                                { "c", 1 },
 778                                { "w", 2 },
 779                                { "", 512 },
 780                                { "b", 512 },
 781                                { "k", 1024 },
 782                                { }
 783                        };
 784                        action_size *ap;
 785                        ap = ALLOC_ACTION(size);
 786                        ap->size_char = arg1[0];
 787                        ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes);
 788                }
 789#endif
 790#if ENABLE_FEATURE_FIND_CONTEXT
 791                else if (parm == PARM_context) {
 792                        action_context *ap;
 793                        ap = ALLOC_ACTION(context);
 794                        ap->context = NULL;
 795                        /* SELinux headers erroneously declare non-const parameter */
 796                        if (selinux_raw_to_trans_context((char*)arg1, &ap->context))
 797                                bb_simple_perror_msg(arg1);
 798                }
 799#endif
 800                else {
 801                        bb_error_msg("unrecognized: %s", arg);
 802                        bb_show_usage();
 803                }
 804                argv++;
 805        }
 806        return appp;
 807#undef ALLOC_ACTION
 808}
 809
 810
 811int find_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 812int find_main(int argc, char **argv)
 813{
 814        static const char options[] ALIGN1 =
 815                          "-follow\0"
 816USE_FEATURE_FIND_XDEV(    "-xdev\0"    )
 817USE_FEATURE_FIND_MAXDEPTH("-mindepth\0""-maxdepth\0")
 818                          ;
 819        enum {
 820                          OPT_FOLLOW,
 821USE_FEATURE_FIND_XDEV(    OPT_XDEV    ,)
 822USE_FEATURE_FIND_MAXDEPTH(OPT_MINDEPTH,)
 823        };
 824
 825        char *arg;
 826        char **argp;
 827        int i, firstopt, status = EXIT_SUCCESS;
 828#if ENABLE_FEATURE_FIND_MAXDEPTH
 829        int minmaxdepth[2] = { 0, INT_MAX };
 830#else
 831#define minmaxdepth NULL
 832#endif
 833
 834        for (firstopt = 1; firstopt < argc; firstopt++) {
 835                if (argv[firstopt][0] == '-')
 836                        break;
 837                if (ENABLE_FEATURE_FIND_NOT && LONE_CHAR(argv[firstopt], '!'))
 838                        break;
 839#if ENABLE_FEATURE_FIND_PAREN
 840                if (LONE_CHAR(argv[firstopt], '('))
 841                        break;
 842#endif
 843        }
 844        if (firstopt == 1) {
 845                argv[0] = (char*)".";
 846                argv--;
 847                firstopt++;
 848        }
 849
 850/* All options always return true. They always take effect
 851 * rather than being processed only when their place in the
 852 * expression is reached.
 853 * We implement: -follow, -xdev, -maxdepth
 854 */
 855        /* Process options, and replace then with -a */
 856        /* (-a will be ignored by recursive parser later) */
 857        argp = &argv[firstopt];
 858        while ((arg = argp[0])) {
 859                int opt = index_in_strings(options, arg);
 860                if (opt == OPT_FOLLOW) {
 861                        recurse_flags |= ACTION_FOLLOWLINKS;
 862                        argp[0] = (char*)"-a";
 863                }
 864#if ENABLE_FEATURE_FIND_XDEV
 865                if (opt == OPT_XDEV) {
 866                        struct stat stbuf;
 867                        if (!xdev_count) {
 868                                xdev_count = firstopt - 1;
 869                                xdev_dev = xmalloc(xdev_count * sizeof(dev_t));
 870                                for (i = 1; i < firstopt; i++) {
 871                                        /* not xstat(): shouldn't bomb out on
 872                                         * "find not_exist exist -xdev" */
 873                                        if (stat(argv[i], &stbuf))
 874                                                stbuf.st_dev = -1L;
 875                                        xdev_dev[i-1] = stbuf.st_dev;
 876                                }
 877                        }
 878                        argp[0] = (char*)"-a";
 879                }
 880#endif
 881#if ENABLE_FEATURE_FIND_MAXDEPTH
 882                if (opt == OPT_MINDEPTH || opt == OPT_MINDEPTH + 1) {
 883                        if (!argp[1])
 884                                bb_show_usage();
 885                        minmaxdepth[opt - OPT_MINDEPTH] = xatoi_u(argp[1]);
 886                        argp[0] = (char*)"-a";
 887                        argp[1] = (char*)"-a";
 888                        argp++;
 889                }
 890#endif
 891                argp++;
 892        }
 893
 894        actions = parse_params(&argv[firstopt]);
 895
 896        for (i = 1; i < firstopt; i++) {
 897                if (!recursive_action(argv[i],
 898                                recurse_flags,  /* flags */
 899                                fileAction,     /* file action */
 900                                fileAction,     /* dir action */
 901#if ENABLE_FEATURE_FIND_MAXDEPTH
 902                                minmaxdepth,    /* user data */
 903#else
 904                                NULL,           /* user data */
 905#endif
 906                                0))             /* depth */
 907                        status = EXIT_FAILURE;
 908        }
 909        return status;
 910}
 911