Mercurial > gcp
annotate gcp @ 14:21b38ed339a4
Fixed KeyboardInterrupt management
author | Goffi <goffi@goffi.org> |
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date | Tue, 28 Sep 2010 14:54:13 +0800 |
parents | 894530949e30 |
children | 8253a5ccbe9a |
rev | line source |
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0 | 1 #!/usr/bin/python |
2 # -*- coding: utf-8 -*- | |
3 | |
4 """ | |
5 gcp: Goffi's CoPier | |
6 Copyright (C) 2010 Jérôme Poisson (goffi@goffi.org) | |
7 | |
8 This program is free software: you can redistribute it and/or modify | |
9 it under the terms of the GNU General Public License as published by | |
10 the Free Software Foundation, either version 3 of the License, or | |
11 (at your option) any later version. | |
12 | |
13 This program is distributed in the hope that it will be useful, | |
14 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 GNU General Public License for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 """ | |
21 | |
22 ### logging ### | |
23 import logging | |
24 from logging import debug, info, error, warning | |
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25 logging.basicConfig(level=logging.INFO, |
0 | 26 format='%(message)s') |
27 ### | |
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28 |
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29 import gettext |
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30 gettext.install('gcp', "i18n", unicode=True) |
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31 |
0 | 32 import sys |
33 import os,os.path | |
34 from optparse import OptionParser #To be replaced by argparse ASAP | |
1 | 35 import cPickle as pickle |
0 | 36 try: |
37 import gobject | |
38 #DBus | |
39 import dbus, dbus.glib | |
40 import dbus.service | |
41 import dbus.mainloop.glib | |
42 except ImportError,e: | |
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43 error(_("Error during import")) |
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44 error(_("Please check dependecies:"),e) |
0 | 45 exit(2) |
46 try: | |
47 from progressbar import ProgressBar, Percentage, Bar, ETA, FileTransferSpeed | |
48 pbar_available=True | |
49 except ImportError, e: | |
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50 info (_('ProgressBar not available, please download it at http://pypi.python.org/pypi/progressbar')) |
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51 info (_('Progress bar deactivated\n--\n')) |
0 | 52 pbar_available=False |
53 | |
54 NAME = "gcp (Goffi's copier)" | |
55 NAME_SHORT = "gcp" | |
56 VERSION = '0.1' | |
57 | |
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58 ABOUT = NAME+u" v"+VERSION+u""" (c) Jérôme Poisson (aka Goffi) 2010 |
0 | 59 |
60 --- | |
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61 """+NAME+u""" Copyright (C) 2010 Jérôme Poisson |
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62 """ + _(u"""This program comes with ABSOLUTELY NO WARRANTY; |
0 | 63 This is free software, and you are welcome to redistribute it |
64 under certain conditions. | |
65 --- | |
66 | |
67 This software is an advanced file copier | |
68 Get the latest version at http://www.goffi.org | |
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69 """) |
0 | 70 |
71 const_DBUS_INTERFACE = "org.goffi.gcp" | |
3 | 72 const_DBUS_PATH = "/org/goffi/gcp" |
73 const_BUFF_SIZE = 4096 | |
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74 const_PRESERVE = set(['mode','ownership','timestamps']) |
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75 const_JOURNAL_PATH = "~/.gcp_journal" |
0 | 76 |
77 | |
78 class DbusObject(dbus.service.Object): | |
79 | |
80 def __init__(self, gcp, bus, path): | |
81 self._gcp = gcp | |
82 dbus.service.Object.__init__(self, bus, path) | |
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83 debug(_("Init DbusObject...")) |
0 | 84 self.cb={} |
85 | |
86 @dbus.service.method(const_DBUS_INTERFACE, | |
87 in_signature='', out_signature='s') | |
88 def getVersion(self): | |
89 """Get gcp version | |
90 @return: version as string""" | |
91 return VERSION | |
92 | |
93 @dbus.service.method(const_DBUS_INTERFACE, | |
1 | 94 in_signature='ss', out_signature='bs') |
0 | 95 def addArgs(self, source_path, args): |
96 """Add arguments to gcp as if there were entered on its own command line | |
1 | 97 @param source_path: current working dir to use as base for arguments, as given by os.getcwd() |
98 @param args: serialized (wich pickle) list of strings - without command name -, as given by sys.argv[1:]. | |
99 @return: success (boolean) and error message if any (string)""" | |
100 try: | |
101 args = pickle.loads(str(args)) | |
102 except TypeError, pickle.UnpicklingError: | |
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103 return (False, _("INTERNAL ERROR: invalid arguments")) |
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104 return self._gcp.parseArguments(args, str(source_path)) |
0 | 105 |
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106 class Journal(): |
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107 def __init__(self, path=const_JOURNAL_PATH): |
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108 self.journal_path = os.path.expanduser(path) |
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109 self.journal_fd = open(self.journal_path,'w') #TODO: check and maybe save previous journals |
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110 |
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111 def __del__(self): |
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112 self.journal_fd.flush() |
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113 self.journal_fd.close() |
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114 |
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115 def startFile(self, source_path): |
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116 """Start an entry in the journal""" |
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117 self.journal_fd.write(source_path+"\n") |
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118 self.journal_fd.flush() |
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119 self.success=True |
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120 self.errors=[] |
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121 |
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122 def closeFile(self): |
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123 """Close the entry in the journal""" |
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124 if not self.success: |
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125 status = "FAILED" |
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126 else: |
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127 status = "OK" if not self.errors else "PARTIAL" |
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128 self.journal_fd.write("%(status)s: %(errors)s\n" % {'status': status, 'errors': ', '.join(self.errors)}) |
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129 self.journal_fd.flush() |
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130 |
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131 def copyFailed(self): |
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132 """Must be called when something is wrong with the copy itself""" |
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133 self.success = False |
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134 |
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135 def error(self, name): |
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136 """Something went wrong""" |
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137 self.errors.append(name) |
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138 |
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139 |
0 | 140 class GCP(): |
141 | |
142 def __init__(self): | |
143 try: | |
144 sessions_bus = dbus.SessionBus() | |
145 db_object = sessions_bus.get_object(const_DBUS_INTERFACE, | |
146 const_DBUS_PATH) | |
147 self.gcp_main = dbus.Interface(db_object, | |
148 dbus_interface=const_DBUS_INTERFACE) | |
149 self._main_instance = False | |
150 | |
151 except dbus.exceptions.DBusException,e: | |
152 if e._dbus_error_name=='org.freedesktop.DBus.Error.ServiceUnknown': | |
153 self.launchDbusMainInstance() | |
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154 debug (_("gcp launched")) |
0 | 155 self._main_instance = True |
3 | 156 self.buffer_size = const_BUFF_SIZE |
12 | 157 self.__launched = False #True when journal is initialised and copy is started |
0 | 158 else: |
159 raise e | |
160 | |
161 def launchDbusMainInstance(self): | |
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162 debug (_("Init DBus...")) |
0 | 163 session_bus = dbus.SessionBus() |
164 self.dbus_name = dbus.service.BusName(const_DBUS_INTERFACE, session_bus) | |
165 self.dbus_object = DbusObject(self, session_bus, const_DBUS_PATH) | |
166 | |
167 self.copy_list = [] | |
168 self.mounts = self.__getMountPoints() | |
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169 self.bytes_total = 0 |
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170 self.bytes_copied = 0 |
0 | 171 |
172 def getFsType(self, path): | |
6 | 173 fs = '' |
174 last_mount_point = '' | |
0 | 175 for mount in self.mounts: |
6 | 176 if path.startswith(mount) and len(mount)>=len(last_mount_point): |
0 | 177 fs = self.mounts[mount] |
6 | 178 last_mount_point = mount |
0 | 179 return fs |
180 | |
181 def __getMountPoints(self): | |
182 """Parse /proc/mounts to get currently mounted devices""" | |
183 #TODO: reparse when a new device is added/a device is removed | |
1 | 184 #(check freedesktop mounting signals) |
0 | 185 ret = {} |
186 try: | |
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187 with open("/proc/mounts",'rb') as mounts: |
0 | 188 for line in mounts.readlines(): |
189 fs_spec, fs_file, fs_vfstype, fs_mntops, fs_freq, fs_passno = line.split(' ') | |
190 ret[fs_file] = fs_vfstype | |
191 except: | |
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192 error (_("Can't read mounts table")) |
0 | 193 return ret |
194 | |
3 | 195 def __appendToList(self, path, dest_path, options): |
0 | 196 """Add a file to the copy list |
197 @param path: absolute path of file | |
198 @param options: options as return by optparse""" | |
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199 debug (_("Adding to copy list: %(path)s ==> %(dest_path)s (%(fs_type)s)") % {"path":path.decode('utf-8','replace'), |
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200 "dest_path":dest_path.decode('utf-8','replace'), |
6 | 201 "fs_type":self.getFsType(dest_path)} ) |
1 | 202 try: |
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203 self.bytes_total+=os.path.getsize(path) |
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204 self.copy_list.insert(0,(path, dest_path, options)) |
1 | 205 except OSError,e: |
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206 error(_("Can't copy %(path)s: %(exception)s") % {'path':path.decode('utf-8','replace'), 'exception':e.strerror}) |
0 | 207 |
1 | 208 |
3 | 209 def __appendDirToList(self, dirpath, dest_path, options): |
0 | 210 """Add recursively directory to the copy list |
211 @param path: absolute path of dir | |
212 @param options: options as return by optparse""" | |
3 | 213 #We first check that the dest path exists, and create it if needed |
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214 dest_path = self.__filename_fix(dest_path, options, no_journal=True) |
3 | 215 if not os.path.exists(dest_path): |
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216 debug ("Creating directory %s" % dest_path) |
3 | 217 os.makedirs(dest_path) #TODO: check permissions |
218 #TODO: check that dest_path is an accessible dir, | |
219 # and skip file/write error in log if needed | |
0 | 220 try: |
221 for filename in os.listdir(dirpath): | |
222 filepath = os.path.join(dirpath,filename) | |
223 if os.path.isdir(filepath): | |
3 | 224 full_dest_path = os.path.join(dest_path,filename) |
225 self.__appendDirToList(filepath, full_dest_path, options) | |
0 | 226 else: |
3 | 227 self.__appendToList(filepath, dest_path, options) |
0 | 228 except OSError,e: |
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229 error(_("Can't append %(path)s to copy list: %(exception)s") % {'path':filepath.decode('utf-8','replace'), |
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230 'exception':e.strerror}) |
0 | 231 |
232 def __checkArgs(self, options, source_path, args): | |
233 """Check thats args are files, and add them to copy list""" | |
1 | 234 assert(len (args)>=2) |
235 try: | |
3 | 236 dest_path = os.path.normpath(os.path.join(os.path.expanduser(source_path), args.pop())) |
1 | 237 except OSError,e: |
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238 error (_("Invalid dest_path: %s"),e) |
1 | 239 |
0 | 240 for path in args: |
1 | 241 abspath = os.path.normpath(os.path.join(os.path.expanduser(source_path), path)) |
0 | 242 if not os.path.exists(abspath): |
11 | 243 warning(_("The path given in arg doesn't exist or is not accessible: %s") % abspath.decode('utf-8','replace')) |
0 | 244 else: |
245 if os.path.isdir(abspath): | |
3 | 246 full_dest_path = dest_path if os.path.isabs(path) else os.path.normpath(os.path.join(dest_path, path)) |
0 | 247 if not options.recursive: |
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248 warning (_('omitting directory "%s"') % abspath) |
0 | 249 else: |
3 | 250 self.__appendDirToList(abspath, full_dest_path, options) |
0 | 251 else: |
3 | 252 self.__appendToList(abspath, dest_path, options) |
0 | 253 |
3 | 254 def __copyNextFile(self): |
255 """Take the last file in the list, and launch the copy using glib io_watch event | |
256 @return: True a file was added, False else""" | |
257 if self.copy_list: | |
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258 source_file, dest_path, options = self.copy_list.pop() |
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259 self.journal.startFile(source_file) |
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260 source_fd = open(source_file, 'rb') |
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261 filename = os.path.basename(source_file) |
3 | 262 assert(filename) |
6 | 263 dest_file = self.__filename_fix(os.path.join(dest_path,filename),options) |
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264 if os.path.exists(dest_file) and not options.force: |
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265 warning (_("File [%s] already exists, skipping it !") % dest_file) |
3 | 266 return True |
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267 try: |
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268 dest_fd = open(dest_file, 'wb') |
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269 except: |
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270 self.journal.copyFailed() |
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271 self.journal.error("can't open dest") |
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272 self.journal.closeFile() |
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273 source_fd.close() |
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274 return True |
3 | 275 |
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276 gobject.io_add_watch(source_fd,gobject.IO_IN,self._copyFile, |
13 | 277 (dest_fd, options), priority=gobject.PRIORITY_DEFAULT) |
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278 if not self.progress: |
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279 info(_("COPYING %(source)s ==> %(dest)s") % {"source":source_path.decode('utf-8','replace'), |
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280 "dest":dest_file.decode('utf-8','replace')}) |
3 | 281 return True |
282 else: | |
283 #Nothing left to copy, we quit | |
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284 if self.progress: |
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285 self.__pbar_finish() |
3 | 286 self.loop.quit() |
287 | |
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288 def __copyFailed(self, reason, source_fd, dest_fd): |
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289 """Write the failure in the journal and close files descriptors""" |
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290 self.journal.copyFailed() |
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291 self.journal.error(reason) |
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292 self.journal.closeFile() |
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293 source_fd.close() |
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294 dest_fd.close() |
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295 |
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296 |
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297 |
3 | 298 def _copyFile(self, source_fd, condition, data): |
299 """Actually copy the file, callback used with io_add_watch | |
300 @param source_fd: file descriptor of the file to copy | |
301 @param condition: condition which launched the callback (glib.IO_IN) | |
302 @param data: tuple with (destination file descriptor, copying options)""" | |
14 | 303 try: |
304 dest_fd,options = data | |
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305 |
14 | 306 try: |
307 buff = source_fd.read(self.buffer_size) | |
308 except KeyboardInterrupt: | |
309 raise KeyboardInterrupt | |
310 except: | |
311 self.__copyFailed("can't read source", source_fd, dest_fd) | |
312 return False | |
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313 |
14 | 314 try: |
315 dest_fd.write(buff) | |
316 except KeyboardInterrupt: | |
317 raise KeyboardInterrupt | |
318 except: | |
319 self.__copyFailed("can't write to dest", source_fd, dest_fd) | |
320 return False | |
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321 |
14 | 322 self.bytes_copied += len(buff) |
323 if self.progress: | |
324 self._pbar_update() | |
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325 |
14 | 326 if len(buff) != self.buffer_size: |
327 source_fd.close() | |
328 dest_fd.close() | |
329 self.__post_copy(source_fd.name, dest_fd.name, options) | |
330 self.journal.closeFile() | |
331 return False | |
332 return True | |
333 except KeyboardInterrupt: | |
334 self._userInterruption() | |
3 | 335 |
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336 def __filename_fix(self, filename, options, no_journal=False): |
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337 """Fix filenames incompatibilities/mistake according to options |
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338 @param filename: full path to the file |
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339 @param options: options as parsed on command line |
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340 @param no_journal: don't write any entry in journal |
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341 @return: fixed filename""" |
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342 fixed_filename = filename |
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343 |
6 | 344 if self.getFsType(filename) == 'vfat' and options.fs_fix: |
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345 fixed_filename = filename.replace('\\','_')\ |
6 | 346 .replace(':',';')\ |
347 .replace('*','+')\ | |
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348 .replace('?','_')\ |
6 | 349 .replace('"','\'')\ |
350 .replace('<','[')\ | |
351 .replace('>',']')\ | |
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352 .replace('|','!')\ |
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353 .rstrip() #XXX: suffixed spaces cause issues (must check FAT doc for why) |
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354 |
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355 if not fixed_filename: |
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356 fixed_filename = '_' |
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357 if fixed_filename != filename and not no_journal: |
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358 self.journal.error('filename fixed') |
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359 return fixed_filename |
6 | 360 |
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361 def __post_copy(self, source_file, dest_file, options): |
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362 """Do post copy traitement (mainly managing --preserve option)""" |
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363 st_mode, st_ino, st_dev, st_nlink, st_uid, st_gid, st_size, st_atime, st_mtime, st_ctime = os.stat(source_file) |
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364 for preserve in options.preserve: |
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365 try: |
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366 if preserve == 'mode': |
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367 os.chmod(dest_file, st_mode) |
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368 elif preserve == 'ownership': |
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369 os.chown(dest_file, st_uid, st_gid) |
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370 elif preserve == 'timestamps': |
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371 os.utime(dest_file, (st_atime, st_mtime)) |
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372 except OSError,e: |
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373 self.journal.error("preserve-"+preserve) |
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374 |
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375 def __get_string_size(self, size): |
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376 """Return a nice string representation of a size""" |
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377 |
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378 if size>=2**50: |
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379 return _("%.2f PiB") % (float(size)/2**50) |
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380 elif size>=2**40: |
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381 return _("%.2f TiB") % (float(size)/2**40) |
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382 elif size>=2**30: |
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383 return _("%.2f GiB") % (float(size)/2**30) |
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384 elif size>=2**20: |
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385 return _("%.2f MiB") % (float(size)/2**20) |
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386 elif size>=2**10: |
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387 return _("%.2f KiB") % (float(size)/2**10) |
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388 else: |
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389 return _("%i B") % size |
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390 |
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391 def _pbar_update(self): |
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392 """Update progress bar position, create the bar if it doesn't exist""" |
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393 assert(self.progress) |
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394 try: |
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395 if self.pbar.maxval != self.bytes_total: |
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396 self.pbar.maxval = self.bytes_total |
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397 self.pbar.widgets[0] = _("Copying %s") % self.__get_string_size(self.bytes_total) |
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398 except AttributeError: |
6 | 399 if not self.bytes_total: |
400 #No progress bar if the files have a null size | |
401 return | |
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402 self.pbar = ProgressBar(self.bytes_total,[_("Copying %s") % self.__get_string_size(self.bytes_total),Percentage()," ",Bar()," ",FileTransferSpeed()," ",ETA()]) |
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403 self.pbar.start() |
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404 self.pbar.update(self.bytes_copied) |
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405 |
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406 def __pbar_finish(self): |
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407 """Mark the progression as finished""" |
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408 assert(self.progress) |
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409 try: |
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410 self.pbar.finish() |
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411 except AttributeError: |
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412 pass |
0 | 413 |
414 def parseArguments(self, full_args=sys.argv[1:], source_path = os.getcwd()): | |
1 | 415 """Parse arguments and add files to queue |
416 @param full_args: list of arguments strings (without program name) | |
417 @param source_path: path from where the arguments come, ad given by os.getcwd() | |
418 @return: a tuple (boolean, message) where the boolean is the success of the arguments | |
419 validation, and message is the error message to print when necessary""" | |
0 | 420 _usage=""" |
421 %prog [options] FILE1 [FILE2 ...] DEST | |
422 | |
423 %prog --help for options list | |
424 """ | |
1 | 425 for idx in range(len(full_args)): |
426 if isinstance(full_args[idx], unicode): | |
427 #We don't want unicode as some filenames can be invalid unicode | |
428 full_args[idx] = full_args[idx].encode('utf-8') | |
429 | |
0 | 430 parser = OptionParser(usage=_usage,version=ABOUT) |
431 | |
432 parser.add_option("-r", "--recursive", action="store_true", default=False, | |
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433 help=_("copy directories recursively")) |
0 | 434 |
4
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435 parser.add_option("-f", "--force", action="store_true", default=False, |
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436 help=_("force overwriting of existing files")) |
4
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437 |
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438 parser.add_option("--preserve", action="store", default='mode,ownership,timestamps', |
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439 help=_("preserve the specified attributes")) |
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440 |
6 | 441 parser.add_option("--no-unicode-fix", action="store_false", dest='unicode_fix', default=True, |
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442 help=_("don't fixe name encoding errors")) #TODO |
6 | 443 |
444 parser.add_option("--no-fs-fix", action="store_false", dest='fs_fix', default=True, | |
8 | 445 help=_("don't fixe filesystem name incompatibily")) |
6 | 446 |
3 | 447 parser.add_option("--no-progress", action="store_false", dest="progress", default=True, |
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448 help=_("deactivate progress bar")) |
3 | 449 |
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450 parser.add_option("-v", "--verbose", action="store_true", default=False, |
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451 help=_("Show what is currently done")) |
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452 |
0 | 453 (options, args) = parser.parse_args(full_args) |
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454 #options check |
3 | 455 if options.progress and not pbar_available: |
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456 warning (_("Progress bar is not available, deactivating")) |
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457 options.progress = self.progress = False |
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458 else: |
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459 self.progress = options.progress |
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460 |
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461 if options.verbose: |
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462 logging.getLogger().setLevel(logging.DEBUG) |
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463 |
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464 preserve = set(options.preserve.split(',')) |
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465 if not preserve.issubset(const_PRESERVE): |
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466 error (_("Invalide --preserve value\nvalid values are:")) |
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467 for value in const_PRESERVE: |
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468 error('- %s' % value) |
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469 exit(2) |
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470 else: |
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471 options.preserve = preserve |
0 | 472 |
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473 #if there is an other instance of gcp, we send options to it |
0 | 474 if not self._main_instance: |
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475 info (_("There is already one instance of %s running, pluging to it") % NAME_SHORT) |
1 | 476 #XXX: we have to serialize data as dbus only accept valid unicode, and filenames |
477 # can have invalid unicode. | |
478 return self.gcp_main.addArgs(os.getcwd(),pickle.dumps(full_args)) | |
0 | 479 else: |
1 | 480 if len(args) < 2: |
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481 _error_msg = _("Wrong number of arguments") |
1 | 482 return (False, _error_msg) |
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483 debug(_("adding args to gcp: %s") % str(args).decode('utf-8','replace')) |
0 | 484 self.__checkArgs(options, source_path, args) |
12 | 485 if not self.__launched: |
486 self.journal = Journal() | |
487 gobject.idle_add(self.__copyNextFile) | |
488 self.__launched = True | |
1 | 489 return (True,'') |
0 | 490 |
14 | 491 def _userInterruption(self): |
492 info(_("User interruption: good bye")) | |
493 exit(1) | |
494 | |
0 | 495 def go(self): |
1 | 496 """Launch main loop""" |
0 | 497 self.loop = gobject.MainLoop() |
498 try: | |
499 self.loop.run() | |
500 except KeyboardInterrupt: | |
14 | 501 self._userInterruption() |
0 | 502 |
503 | |
504 if __name__ == "__main__": | |
505 gcp = GCP() | |
1 | 506 success,message = gcp.parseArguments() |
507 if not success: | |
508 error(message) | |
509 exit(1) | |
0 | 510 if gcp._main_instance: |
511 gcp.go() | |
512 |