Magellan Linux

  • Back to homepage
    • /[magellan-source]/trunk/mkinitrd-magellan/busybox/libbb/recursive_action.c

    Diff of /trunk/mkinitrd-magellan/busybox/libbb/recursive_action.c

    Parent Directory Parent Directory | Revision Log Revision Log | View Patch Patch

    revision 815 by niro, Sat Sep 1 22:45:15 2007 UTC revision 816 by niro, Fri Apr 24 18:33:46 2009 UTC
    # Line 22  Line 22 
    22   * is so stinking huge.   * is so stinking huge.
    23   */   */
    24    
    25  static int true_action(const char *fileName, struct stat *statbuf, void* userData, int depth)  static int FAST_FUNC true_action(const char *fileName UNUSED_PARAM,
    26     struct stat *statbuf UNUSED_PARAM,
    27     void* userData UNUSED_PARAM,
    28     int depth UNUSED_PARAM)
    29  {  {
    30   return TRUE;   return TRUE;
    31  }  }
    # Line 31  static int true_action(const char *fileN Line 34  static int true_action(const char *fileN
    34   * recursive_action() return 0, but it doesn't stop directory traversal   * recursive_action() return 0, but it doesn't stop directory traversal
    35   * (fileAction/dirAction will be called on each file).   * (fileAction/dirAction will be called on each file).
    36   *   *
    37   * if !depthFirst, dirAction return value of 0 (FALSE) or 2 (SKIP)   * If !ACTION_RECURSE, dirAction is called on the directory and its
    38   * prevents recursion into that directory, instead   * return value is returned from recursive_action(). No recursion.
    39   * recursive_action() returns 0 (if FALSE) or 1 (if SKIP).   *
    40     * If ACTION_RECURSE, recursive_action() is called on each directory.
    41     * If any one of these calls returns 0, current recursive_action() returns 0.
    42     *
    43     * If ACTION_DEPTHFIRST, dirAction is called after recurse.
    44     * If it returns 0, the warning is printed and recursive_action() returns 0.
    45     *
    46     * If !ACTION_DEPTHFIRST, dirAction is called before we recurse.
    47     * Return value of 0 (FALSE) or 2 (SKIP) prevents recursion
    48     * into that directory, instead recursive_action() returns 0 (if FALSE)
    49     * or 1 (if SKIP)
    50   *   *
    51   * followLinks=0/1 differs mainly in handling of links to dirs.   * followLinks=0/1 differs mainly in handling of links to dirs.
    52   * 0: lstat(statbuf). Calls fileAction on link name even if points to dir.   * 0: lstat(statbuf). Calls fileAction on link name even if points to dir.
    53   * 1: stat(statbuf). Calls dirAction and optionally recurse on link to dir.   * 1: stat(statbuf). Calls dirAction and optionally recurse on link to dir.
    54   */   */
    55    
    56  int recursive_action(const char *fileName,  int FAST_FUNC recursive_action(const char *fileName,
    57   int recurse, int followLinks, int depthFirst,   unsigned flags,
    58   int (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),   int FAST_FUNC (*fileAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
    59   int (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),   int FAST_FUNC (*dirAction)(const char *fileName, struct stat *statbuf, void* userData, int depth),
    60   void* userData,   void* userData,
    61   int depth)   unsigned depth)
    62  {  {
    63   struct stat statbuf;   struct stat statbuf;
    64   int status;   int status;
    # Line 55  int recursive_action(const char *fileNam Line 68  int recursive_action(const char *fileNam
    68   if (!fileAction) fileAction = true_action;   if (!fileAction) fileAction = true_action;
    69   if (!dirAction) dirAction = true_action;   if (!dirAction) dirAction = true_action;
    70    
    71   status = (followLinks ? stat : lstat)(fileName, &statbuf);   status = ACTION_FOLLOWLINKS; /* hijack a variable for bitmask... */
    72     if (!depth)
    73     status = ACTION_FOLLOWLINKS | ACTION_FOLLOWLINKS_L0;
    74     status = ((flags & status) ? stat : lstat)(fileName, &statbuf);
    75   if (status < 0) {   if (status < 0) {
    76  #ifdef DEBUG_RECURS_ACTION  #ifdef DEBUG_RECURS_ACTION
    77   bb_error_msg("status=%d followLinks=%d TRUE=%d",   bb_error_msg("status=%d flags=%x", status, flags);
      status, followLinks, TRUE);  
    78  #endif  #endif
    79   bb_perror_msg("%s", fileName);   goto done_nak_warn;
      return FALSE;  
    80   }   }
    81    
    82   /* If S_ISLNK(m), then we know that !S_ISDIR(m).   /* If S_ISLNK(m), then we know that !S_ISDIR(m).
    83   * Then we can skip checking first part: if it is true, then   * Then we can skip checking first part: if it is true, then
    84   * (!dir) is also true! */   * (!dir) is also true! */
    85   if ( /* (!followLinks && S_ISLNK(statbuf.st_mode)) || */   if ( /* (!(flags & ACTION_FOLLOWLINKS) && S_ISLNK(statbuf.st_mode)) || */
    86   !S_ISDIR(statbuf.st_mode)   !S_ISDIR(statbuf.st_mode)
    87   ) {   ) {
    88   return fileAction(fileName, &statbuf, userData, depth);   return fileAction(fileName, &statbuf, userData, depth);
    # Line 77  int recursive_action(const char *fileNam Line 90  int recursive_action(const char *fileNam
    90    
    91   /* It's a directory (or a link to one, and followLinks is set) */   /* It's a directory (or a link to one, and followLinks is set) */
    92    
    93   if (!recurse) {   if (!(flags & ACTION_RECURSE)) {
    94   return dirAction(fileName, &statbuf, userData, depth);   return dirAction(fileName, &statbuf, userData, depth);
    95   }   }
    96    
    97   if (!depthFirst) {   if (!(flags & ACTION_DEPTHFIRST)) {
    98   status = dirAction(fileName, &statbuf, userData, depth);   status = dirAction(fileName, &statbuf, userData, depth);
    99   if (!status) {   if (!status)
    100   bb_perror_msg("%s", fileName);   goto done_nak_warn;
      return FALSE;  
      }  
    101   if (status == SKIP)   if (status == SKIP)
    102   return TRUE;   return TRUE;
    103   }   }
    # Line 96  int recursive_action(const char *fileNam Line 107  int recursive_action(const char *fileNam
    107   /* findutils-4.1.20 reports this */   /* findutils-4.1.20 reports this */
    108   /* (i.e. it doesn't silently return with exit code 1) */   /* (i.e. it doesn't silently return with exit code 1) */
    109   /* To trigger: "find -exec rm -rf {} \;" */   /* To trigger: "find -exec rm -rf {} \;" */
    110   bb_perror_msg("%s", fileName);   goto done_nak_warn;
      return FALSE;  
    111   }   }
    112   status = TRUE;   status = TRUE;
    113   while ((next = readdir(dir)) != NULL) {   while ((next = readdir(dir)) != NULL) {
    # Line 106  int recursive_action(const char *fileNam Line 116  int recursive_action(const char *fileNam
    116   nextFile = concat_subpath_file(fileName, next->d_name);   nextFile = concat_subpath_file(fileName, next->d_name);
    117   if (nextFile == NULL)   if (nextFile == NULL)
    118   continue;   continue;
    119   if (!recursive_action(nextFile, TRUE, followLinks, depthFirst,   /* process every file (NB: ACTION_RECURSE is set in flags) */
    120   fileAction, dirAction, userData, depth+1)) {   if (!recursive_action(nextFile, flags, fileAction, dirAction,
    121     userData, depth + 1))
    122   status = FALSE;   status = FALSE;
    123   }  // s = recursive_action(nextFile, flags, fileAction, dirAction,
    124    // userData, depth + 1);
    125   free(nextFile);   free(nextFile);
    126    //#define RECURSE_RESULT_ABORT 3
    127    // if (s == RECURSE_RESULT_ABORT) {
    128    // closedir(dir);
    129    // return s;
    130    // }
    131    // if (s == FALSE)
    132    // status = FALSE;
    133   }   }
    134   closedir(dir);   closedir(dir);
    135   if (depthFirst) {  
    136   if (!dirAction(fileName, &statbuf, userData, depth)) {   if (flags & ACTION_DEPTHFIRST) {
    137   bb_perror_msg("%s", fileName);   if (!dirAction(fileName, &statbuf, userData, depth))
    138   return FALSE;   goto done_nak_warn;
      }  
    139   }   }
    140    
    141   if (!status)   return status;
    142   return FALSE;  
    143   return TRUE;   done_nak_warn:
    144     if (!(flags & ACTION_QUIET))
    145     bb_simple_perror_msg(fileName);
    146     return FALSE;
    147  }  }
    Legend:
    Removed from v.815  
    changed lines
      Added in v.816