direct/python/yaffs_importer.py

   1 import os
   2 from yaffsfs import *
   3 import sys
   4 import ctypes
   5
   6
   7 dir_in_snapshot=[]
   8 files_in_snapshot=[]
   9 symlinks_in_snapshot=[]
  10 unknown_in_snapshot=[]
  11 is_mount_in_snapshot=[]
  12 def check_for_yaffs_errors(output):
  13     if output<0:
  14         ##error has happened
  15         error=ctypes.c_int()
  16         error=yaffs_get_error()
  17         debug_message("error######################################",0)
  18         debug_message(("error code", error),  0)
  19
  20 def debug_message(message, debug_level):
  21     """notew that debug level 0 will always be printed"""
  22     """level 0 error messages"""
  23     """level 1 basic tasks are shown(creating, deleating,ect)"""
  24     """level 2 all process are shown"""
  25     if current_debug_level>=debug_level:
  26         print message
  27
  28 def join_paths(path1, path2):
  29     new_path=path1
  30     if path1[len(path1)-1]=="/"and path2[0]=="/":
  31         new_path+=path2[1:]
  32     elif path1[len(path1)-1]!="/"and path2[0]!="/":
  33         new_path+="/"
  34         new_path+=path2
  35     else:
  36         new_path+=path2
  37     return new_path
  38
  39 def subtract_paths(path1, path2):
  40     if len(path1)>len(path2):
  41         ##if the two paths are diretly subtractable
  42         if path1[0:len (path2)-1]==path2:
  43             new_path=path1[len(path2):]
  44         elif path1[1:len (path2)-1]==path2:
  45             new_path=path1[len(path2)+1:]
  46         elif path1[1:len (path2)]==path2[1:]:
  47             new_path=path1[len(path2)-1:]
  48         else :
  49             debug_message("error:could not subtract paths", 0)
  50             debug_message( ("paths do not match:"+ path1+ "  "+path2), 0)
  51             return 0
  52         return new_path
  53     else :
  54         debug_message( ("cannot subtract path2(:", path2, ") from path1(", path1, ")because path 2 is too long"), 0)
  55         return 0
  56
  57
  58 def create_file(file):
  59     debug_message( "\n \n \n", 2)
  60     file_path=yaffs_root_dir_path+file["path"][len(path):]
  61     debug_message( ("creating file:", file_path), 2)
  62     debug_message (("mode", file["mode"]), 2)
  63     debug_message("opening file",2)
  64 #    output=yaffs_unlink(path)
  65 #    print"unlinking", output
  66 #    check_for_yaffs_errors(output)
  67     current_handle=yaffs_open(file_path, yaffs_O_CREAT | yaffs_O_TRUNC| yaffs_O_RDWR, yaffs_S_IWRITE)  ##opens a file with mode set to write
  68     debug_message(("current_handle", current_handle), 2)
  69     data_file=open(file["path"], "r")
  70     output=yaffs_lseek(current_handle, 0, 0)
  71     if output==-1:
  72         debug_message("error with yaffs lseeking", 2)
  73
  74         check_for_yaffs_errors(output)
  75     data_to_be_written= data_file.read()
  76
  77
  78 #    debug_message( ("data to be saved########################################################################/n"+ data_to_be_written), 2)
  79 #    debug_message("###########################################################################################",2)
  80     length_of_file=len(data_to_be_written)
  81     debug_message (("length of data to be written",length_of_file), 2)
  82     output=yaffs_write(current_handle,data_to_be_written , length_of_file)
  83     if output>=0:
  84         debug_message(( "writing file:", output), 2)
  85     else :
  86         debug_message(( "error writing file:", output), 0)
  87         check_for_yaffs_errors(output)
  88     output=yaffs_ftruncate(current_handle, length_of_file)
  89     if output>=0:
  90         debug_message(( "truncating file:", output), 2)
  91     else :
  92         debug_message(( "error truncating file:", output), 0)
  93         check_for_yaffs_errors(output)
  94     output=yaffs_close(current_handle)
  95     if output>=0:
  96         debug_message(( "closing file:", output), 2)
  97     else :
  98         debug_message(( "error closing file:", output), 0)
  99         check_for_yaffs_errors(output)
 100     ##changes the mode of the yaffs file to be the same as the scanned file
 101 #    yaffs_chmod(file_path, file["mode"]);
 102 #    if output>=0:
 103 #        debug_message(( "chmoding file:", output), 2)
 104 #    else :
 105 #        debug_message(( "error chmoding file:", output), 0)
 106 #        check_for_yaffs_errors(output)
 107
 108 def remove_file_from_path(path):
 109     slash_id=[]
 110     for i in range(0, len(path)):
 111         if path[i]=="/":
 112             slash_id.append(i)
 113     new_path=path[:slash_id[len(slash_id)-1]]
 114     debug_message( ("removed file from path", new_path), 2)
 115     return new_path
 116 def is_dir_hidden(dir):
 117     """this code tests if a directory is hidden (has a ./<name> format) and returns true if it is hidden"""
 118     slash_id=[]
 119     for i in range(0, len(dir)):
 120         if dir[i]=="/":
 121             slash_id.append(i)
 122
 123     if dir[slash_id[len(slash_id)-1]+1]==".":
 124         return True
 125     else :
 126         return False
 127
 128 def scan_dir(path):
 129     """this function scans all of the files and directories in a directory. The function then calls its self on any of the directories that it found. this causes it to build up a tree of all the files and directories """
 130     global files_in_snapshot
 131     global symlinks_in_snapshot
 132     global search_hidden_directories
 133     dir_in_current_dir=[]
 134     if os.path.exists(path)==False:
 135         debug_message ("error#############################",0)
 136         debug_message (("path:", path, "  doesnot exist"), 0)
 137         return 0
 138     dir_snapshot=os.listdir(path)
 139     for i in range(0, len(dir_snapshot)):
 140
 141         current_snapshot=os.path.join(path, dir_snapshot[i])
 142         debug_message (("current snapshot:", current_snapshot), 2)
 143         isDir=os.path.isdir(current_snapshot)
 144         isFile=os.path.isfile(current_snapshot)
 145         isLink=os.path.islink(current_snapshot)
 146         isMount=os.path.ismount(current_snapshot)
 147
 148         stat=os.lstat(current_snapshot)
 149
 150         ##note the order of these if and elif statemens is importaint since a file can be symbloic link and a file
 151         if isDir:
 152             if search_hidden_directories==True or (is_dir_hidden(current_snapshot) ==False or search_hidden_directories==True ) :
 153 #                st_mode ##mode of the folder read/write ect
 154                 dir_in_snapshot.append({"path":current_snapshot, "mode":stat.st_mode})
 155                 dir_in_current_dir.append(current_snapshot)
 156             else :
 157                 debug_message( ("file is hidden so it is ingored", current_snapshot,), 1)
 158         elif  isLink:
 159
 160             ##for some reason the os.readlink only gives the target link realative to the directory which the symbloic link is in. change this into a absolute path
 161             x=current_snapshot
 162             x=remove_file_from_path(x)
 163             target=join_paths(x,os.readlink(current_snapshot) )
 164             symlinks_in_snapshot.append({"path":current_snapshot, "target":target})
 165         elif isFile:
 166
 167 #            stat.st_ino ##inode number
 168 #            st_nlink ##number of hard links to this file
 169 #            st_size ##size of file
 170             files_in_snapshot.append({"path":current_snapshot, "inode": stat.st_ino, "size":stat.st_size, "num_of_hardlinks":stat.st_nlink, "mode":stat.st_mode})
 171
 172         elif isMount:
 173             is_mount_in_snapshot.append(current_snapshot)
 174         else:
 175             unknown_in_snapshot.append(current_snapshot)
 176
 177     for i in range(0, len(dir_in_current_dir)):
 178         scan_dir(dir_in_current_dir[i])
 179
 180 def print_scanned_dir_list():
 181     global files_in_snapshot
 182     global symlinks_in_snapshot
 183     print( "scanning dir", 2)
 184
 185
 186     for i in range(0, len(files_in_snapshot)):
 187         if files_in_snapshot[i]["num_of_hardlinks"]>1:
 188             print "inode",files_in_snapshot[i]["inode"],"size",files_in_snapshot[i]["size"],"path:", files_in_snapshot[i]["path"], "    num of hard links",  files_in_snapshot[i]["num_of_hardlinks"]
 189
 190         else :
 191             print "inode",files_in_snapshot[i]["inode"],"size",files_in_snapshot[i]["size"],"path:", files_in_snapshot[i]["path"]
 192 #        current_open_file=open(files_in_snapshot[i], "r")
 193 #        #current_open_file.f.read(3)
 194 #        lines_in_file=current_open_file.readlines()
 195 #        #use for loop to write code into yaffs file
 196 #        print "number of line of code:", len(lines_in_file)
 197 #    print current_open_file
 198     for i in range(0, len(symlinks_in_snapshot)):
 199         print "symlinks in snapshot:", symlinks_in_snapshot[i]
 200     for i in range(0, len(dir_in_snapshot)):
 201         print "directories in snapshot:", dir_in_snapshot[i]
 202     for i in range(0, len(unknown_in_snapshot)):
 203         print "unknown objects in snapshot:", unknown_in_snapshot[i]
 204
 205 def copy_scanned_files_into_yaffs():
 206     global files_in_snapshot
 207     global symlinks_in_snapshot
 208     global path
 209 #########################################copy directories into yaffs so the files can be created in these directories
 210     debug_message("making directories in yaffs", 1)
 211     for i in range(0, len(dir_in_snapshot)):
 212
 213
 214         dir_path=join_paths(yaffs_root_dir_path,subtract_paths(dir_in_snapshot[i]["path"], path) )
 215         output=yaffs_mkdir(dir_path,dir_in_snapshot[i]["mode"] )
 216         debug_message(("made directory:", dir_path,   "  output", output), 1)
 217         debug_message(("mode" ,dir_in_snapshot[i]["mode"]), 2)
 218
 219
 220
 221 #########################################copy file into yaffs
 222     debug_message("copying scanned files into yaffs", 1)
 223     list=[]
 224     inode_blacklist=[]
 225
 226     debug_message("files to be copyied into yaffs", 2)
 227     for a in range(0, len(files_in_snapshot)):
 228         debug_message(files_in_snapshot[a], 2)
 229     debug_message("\n\n\n", 2)
 230     for i in range(0, len(files_in_snapshot)):
 231         list=[]
 232         if files_in_snapshot[i]["num_of_hardlinks"]>1 and files_in_snapshot[i]["inode"] not in inode_blacklist :
 233             debug_message("found a hard link", 2)
 234             debug_message(("inode",files_in_snapshot[i]["inode"],"size",files_in_snapshot[i]["size"],"path:", files_in_snapshot[i]["path"], "    num of hard links",  files_in_snapshot[i]["num_of_hardlinks"] ), 2)
 235             for a in range(0, len(files_in_snapshot) ) :
 236                 if files_in_snapshot[a]["inode"] ==files_in_snapshot[i]["inode"]  :
 237                     ##and os.path.isfile(files_in_snapshot[i])
 238                     debug_message(("found this file which matches inode",files_in_snapshot[a]), 2)
 239                     list.append(files_in_snapshot[a])
 240                     debug_message(("length of list", len(list)), 2)
 241                 if len(list)==files_in_snapshot[i]["num_of_hardlinks"]:
 242                     break
 243             for a in range(0, len(list)):
 244                 debug_message(list[a], 2)
 245             ##add inode to blacklist. all of the indoes in the list should be the same.
 246             inode_blacklist.append(list[0]["inode"])
 247             ##create a file from the first hardlink.
 248             create_file(list[0])
 249             target_path=yaffs_root_dir_path+list[0]["path"][len(path):]
 250             for i in range(1, len(list)):
 251                 debug_message("creating_symlink", 2)
 252                 debug_message(("target path", target_path), 2)
 253                 hardlink_path=yaffs_root_dir_path+list[i]["path"][len(path):]
 254                 debug_message(("hardlink path", hardlink_path), 2)
 255                 output=yaffs_link(target_path,hardlink_path)
 256                 debug_message(("creating hardlink:", list[i]["path"], "output:", output), 1)
 257         elif files_in_snapshot[i]["inode"] not in inode_blacklist :
 258             create_file(files_in_snapshot[i])
 259
 260
 261 ############################copy symlinks into yaffs
 262
 263     for i in range(0, len(symlinks_in_snapshot)):
 264         debug_message(("symlinks in snapshot:", symlinks_in_snapshot[i]), 2)
 265         target_path=join_paths(yaffs_root_dir_path, subtract_paths(symlinks_in_snapshot[i]["target"],  path))
 266         new_path=join_paths(yaffs_root_dir_path, subtract_paths(symlinks_in_snapshot[i]["path"], path))
 267         output=yaffs_symlink(target_path, new_path)
 268         debug_message(("created symlink",new_path , " > ", target_path, "  output:", output), 1)
 269         ##yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath);
 270
 271
 272     for i in range(0, len(unknown_in_snapshot)):
 273         debug_message( ("unknown object in snapshot:", unknown_in_snapshot[i]), 0)
 274
 275 def import_into_yaffs(file_path, yaffs_path="/yaffs2/", debug_level=1,  copy_hidden_dir=False,new_yaffs_trace_val=0 ):
 276     global current_debug_level
 277     global search_hidden_directories
 278     global yaffs_root_dir_path
 279     global path
 280
 281     current_debug_level=debug_level
 282     search_hidden_directories=copy_hidden_dir
 283     yaffs_root_dir_path=yaffs_path
 284     path=file_path
 285     old_yaffs_trace_val=yaffs_get_trace()
 286     yaffs_set_trace(new_yaffs_trace_val)
 287     scan_dir(path)
 288     copy_scanned_files_into_yaffs()
 289     yaffs_set_trace(old_yaffs_trace_val)
 290
 291
 292 if __name__=="__main__":
 293     yaffs_StartUp()
 294     yaffs_mount("/yaffs2/")
 295     yaffs_set_trace(0)
 296     absolute_path = os.path.abspath(os.path.curdir)
 297     #print "absolute path:", absolute_path
 298     current_debug_level=1
 299     search_hidden_directories=True
 300     yaffs_root_dir_path="/yaffs2/"
 301     #print sys.argv
 302     path=sys.argv[1]
 303     for i in range(2, len(sys.argv)):
 304         if sys.argv[i]=="-d":
 305             current_debug_level=int( sys.argv[i+1])
 306         if sys.argv[i]=="-ignore_hidden_directories":
 307             search_hidden_directories=False
 308 #
 309 #
 310 #    path="/home/timothy/work/yaffs/git/yaffs2"
 311 #    path="/home/timothy/my_stuff/old_laptop/timothy/programming_lejos/"
 312
 313
 314
 315     scan_dir(path)
 316     copy_scanned_files_into_yaffs()
 317     #print_scanned_dir_list()
 318
 319     print"unmounting yaffs:", yaffs_unmount("/yaffs2/")