autorandr.py

   1 #!/usr/bin/env python
   2 # encoding: utf-8
   3 #
   4 # autorandr.py
   5 # Copyright (c) 2015, Phillip Berndt
   6 #
   7 # Autorandr rewrite in Python
   8 #
   9 # This script aims to be fully compatible with the original autorandr.
  10 #
  11 # This program is free software: you can redistribute it and/or modify
  12 # it under the terms of the GNU General Public License as published by
  13 # the Free Software Foundation, either version 3 of the License, or
  14 # (at your option) any later version.
  15 #
  16 # This program is distributed in the hope that it will be useful,
  17 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19 # GNU General Public License for more details.
  20 #
  21 # You should have received a copy of the GNU General Public License
  22 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  23 #
  24
  25 from __future__ import print_function
  26
  27 import binascii
  28 import copy
  29 import fnmatch
  30 import getopt
  31 import hashlib
  32 import os
  33 import posix
  34 import pwd
  35 import re
  36 import subprocess
  37 import sys
  38 import shutil
  39 import time
  40
  41 from collections import OrderedDict
  42 from distutils.version import LooseVersion as Version
  43 from functools import reduce
  44 from itertools import chain
  45
  46 if sys.version_info.major == 2:
  47     import ConfigParser as configparser
  48 else:
  49     import configparser
  50
  51 __version__ = "1.5"
  52
  53 try:
  54     input = raw_input
  55 except NameError:
  56     pass
  57
  58 virtual_profiles = [
  59     # (name, description, callback)
  60     ("off", "Disable all outputs", None),
  61     ("common", "Clone all connected outputs at the largest common resolution", None),
  62     ("clone-largest", "Clone all connected outputs with the largest resolution (scaled down if necessary)", None),
  63     ("horizontal", "Stack all connected outputs horizontally at their largest resolution", None),
  64     ("vertical", "Stack all connected outputs vertically at their largest resolution", None),
  65 ]
  66
  67 help_text = """
  68 Usage: autorandr [options]
  69
  70 -h, --help              get this small help
  71 -c, --change            reload current setup
  72 -d, --default <profile> make profile <profile> the default profile
  73 -l, --load <profile>    load profile <profile>
  74 -s, --save <profile>    save your current setup to profile <profile>
  75 -r, --remove <profile>  remove profile <profile>
  76 --batch                 run autorandr for all users with active X11 sessions
  77 --current               only list current (active) configuration(s)
  78 --config                dump your current xrandr setup
  79 --debug                 enable verbose output
  80 --detected              only list detected (available) configuration(s)
  81 --dry-run               don't change anything, only print the xrandr commands
  82 --fingerprint           fingerprint your current hardware setup
  83 --force                 force (re)loading of a profile
  84 --skip-options <option> comma separated list of xrandr arguments (e.g. "gamma")
  85                         to skip both in detecting changes and applying a profile
  86 --version               show version information and exit
  87
  88  If no suitable profile can be identified, the current configuration is kept.
  89  To change this behaviour and switch to a fallback configuration, specify
  90  --default <profile>.
  91
  92  autorandr supports a set of per-profile and global hooks. See the documentation
  93  for details.
  94
  95  The following virtual configurations are available:
  96 """.strip()
  97
  98
  99 class AutorandrException(Exception):
 100     def __init__(self, message, original_exception=None, report_bug=False):
 101         self.message = message
 102         self.report_bug = report_bug
 103         if original_exception:
 104             self.original_exception = original_exception
 105             trace = sys.exc_info()[2]
 106             while trace.tb_next:
 107                 trace = trace.tb_next
 108             self.line = trace.tb_lineno
 109             self.file_name = trace.tb_frame.f_code.co_filename
 110         else:
 111             try:
 112                 import inspect
 113                 frame = inspect.currentframe().f_back
 114                 self.line = frame.f_lineno
 115                 self.file_name = frame.f_code.co_filename
 116             except:
 117                 self.line = None
 118                 self.file_name = None
 119             self.original_exception = None
 120
 121         if os.path.abspath(self.file_name) == os.path.abspath(sys.argv[0]):
 122             self.file_name = None
 123
 124     def __str__(self):
 125         retval = [self.message]
 126         if self.line:
 127             retval.append(" (line %d%s)" % (self.line, ("; %s" % self.file_name) if self.file_name else ""))
 128         if self.original_exception:
 129             retval.append(":\n  ")
 130             retval.append(str(self.original_exception).replace("\n", "\n  "))
 131         if self.report_bug:
 132             retval.append("\nThis appears to be a bug. Please help improving autorandr by reporting it upstream:"
 133                           "\nhttps://github.com/phillipberndt/autorandr/issues"
 134                           "\nPlease attach the output of `xrandr --verbose` to your bug report if appropriate.")
 135         return "".join(retval)
 136
 137
 138 class XrandrOutput(object):
 139     "Represents an XRandR output"
 140
 141     # This regular expression is used to parse an output in `xrandr --verbose'
 142     XRANDR_OUTPUT_REGEXP = """(?x)
 143         ^(?P<output>[^ ]+)\s+                                                           # Line starts with output name
 144         (?:                                                                             # Differentiate disconnected and connected
 145             disconnected |                                                              # in first line
 146             unknown\ connection |
 147             (?P<connected>connected)
 148         )
 149         \s*
 150         (?P<primary>primary\ )?                                                         # Might be primary screen
 151         (?:\s*
 152             (?P<width>[0-9]+)x(?P<height>[0-9]+)                                        # Resolution (might be overridden below!)
 153             \+(?P<x>-?[0-9]+)\+(?P<y>-?[0-9]+)\s+                                       # Position
 154             (?:\(0x[0-9a-fA-F]+\)\s+)?                                                  # XID
 155             (?P<rotate>(?:normal|left|right|inverted))\s+                               # Rotation
 156             (?:(?P<reflect>X\ and\ Y|X|Y)\ axis)?                                       # Reflection
 157         )?                                                                              # .. but only if the screen is in use.
 158         (?:[\ \t]*\([^\)]+\))(?:\s*[0-9]+mm\sx\s[0-9]+mm)?
 159         (?:[\ \t]*panning\ (?P<panning>[0-9]+x[0-9]+\+[0-9]+\+[0-9]+))?                 # Panning information
 160         (?:[\ \t]*tracking\ (?P<tracking>[0-9]+x[0-9]+\+[0-9]+\+[0-9]+))?               # Tracking information
 161         (?:[\ \t]*border\ (?P<border>(?:[0-9]+/){3}[0-9]+))?                            # Border information
 162         (?:\s*(?:                                                                       # Properties of the output
 163             Gamma: (?P<gamma>(?:inf|[0-9\.: e])+) |                                     # Gamma value
 164             Transform: (?P<transform>(?:[\-0-9\. ]+\s+){3}) |                           # Transformation matrix
 165             EDID: (?P<edid>\s*?(?:\\n\\t\\t[0-9a-f]+)+) |                               # EDID of the output
 166             (?![0-9])[^:\s][^:\n]+:.*(?:\s\\t[\\t ].+)*                                 # Other properties
 167         ))+
 168         \s*
 169         (?P<modes>(?:
 170             (?P<mode_name>\S+).+?\*current.*\s+                                         # Interesting (current) resolution:
 171              h:\s+width\s+(?P<mode_width>[0-9]+).+\s+                                   # Extract rate
 172              v:\s+height\s+(?P<mode_height>[0-9]+).+clock\s+(?P<rate>[0-9\.]+)Hz\s* |
 173             \S+(?:(?!\*current).)+\s+h:.+\s+v:.+\s*                                     # Other resolutions
 174         )*)
 175     """
 176
 177     XRANDR_OUTPUT_MODES_REGEXP = """(?x)
 178         (?P<name>\S+).+?(?P<preferred>\+preferred)?\s+
 179          h:\s+width\s+(?P<width>[0-9]+).+\s+
 180          v:\s+height\s+(?P<height>[0-9]+).+clock\s+(?P<rate>[0-9\.]+)Hz\s* |
 181     """
 182
 183     XRANDR_13_DEFAULTS = {
 184         "transform": "1,0,0,0,1,0,0,0,1",
 185         "panning": "0x0",
 186     }
 187
 188     XRANDR_12_DEFAULTS = {
 189         "reflect": "normal",
 190         "rotate": "normal",
 191         "gamma": "1.0:1.0:1.0",
 192     }
 193
 194     XRANDR_DEFAULTS = dict(list(XRANDR_13_DEFAULTS.items()) + list(XRANDR_12_DEFAULTS.items()))
 195
 196     EDID_UNAVAILABLE = "--CONNECTED-BUT-EDID-UNAVAILABLE-"
 197
 198     def __repr__(self):
 199         return "<%s%s %s>" % (self.output, self.short_edid, " ".join(self.option_vector))
 200
 201     @property
 202     def short_edid(self):
 203         return ("%s..%s" % (self.edid[:5], self.edid[-5:])) if self.edid else ""
 204
 205     @property
 206     def options_with_defaults(self):
 207         "Return the options dictionary, augmented with the default values that weren't set"
 208         if "off" in self.options:
 209             return self.options
 210         options = {}
 211         if xrandr_version() >= Version("1.3"):
 212             options.update(self.XRANDR_13_DEFAULTS)
 213         if xrandr_version() >= Version("1.2"):
 214             options.update(self.XRANDR_12_DEFAULTS)
 215         options.update(self.options)
 216         return {a: b for a, b in options.items() if a not in self.ignored_options}
 217
 218     @property
 219     def filtered_options(self):
 220         "Return a dictionary of options without ignored options"
 221         return {a: b for a, b in self.options.items() if a not in self.ignored_options}
 222
 223     @property
 224     def option_vector(self):
 225         "Return the command line parameters for XRandR for this instance"
 226         args = ["--output", self.output]
 227         for option, arg in sorted(self.options_with_defaults.items()):
 228             args.append("--%s" % option)
 229             if arg:
 230                 args.append(arg)
 231         return args
 232
 233     @property
 234     def option_string(self):
 235         "Return the command line parameters in the configuration file format"
 236         options = ["output %s" % self.output]
 237         for option, arg in sorted(self.filtered_options.items()):
 238             if arg:
 239                 options.append("%s %s" % (option, arg))
 240             else:
 241                 options.append(option)
 242         return "\n".join(options)
 243
 244     @property
 245     def sort_key(self):
 246         "Return a key to sort the outputs for xrandr invocation"
 247         if not self.edid:
 248             return -2
 249         if "off" in self.options:
 250             return -1
 251         if "pos" in self.options:
 252             x, y = map(float, self.options["pos"].split("x"))
 253         else:
 254             x, y = 0, 0
 255         return x + 10000 * y
 256
 257     def __init__(self, output, edid, options):
 258         "Instanciate using output name, edid and a dictionary of XRandR command line parameters"
 259         self.output = output
 260         self.edid = edid
 261         self.options = options
 262         self.ignored_options = []
 263         self.remove_default_option_values()
 264
 265     def set_ignored_options(self, options):
 266         "Set a list of xrandr options that are never used (neither when comparing configurations nor when applying them)"
 267         self.ignored_options = list(options)
 268
 269     def remove_default_option_values(self):
 270         "Remove values from the options dictionary that are superflous"
 271         if "off" in self.options and len(self.options.keys()) > 1:
 272             self.options = {"off": None}
 273             return
 274         for option, default_value in self.XRANDR_DEFAULTS.items():
 275             if option in self.options and self.options[option] == default_value:
 276                 del self.options[option]
 277
 278     @classmethod
 279     def from_xrandr_output(cls, xrandr_output):
 280         """Instanciate an XrandrOutput from the output of `xrandr --verbose'
 281
 282         This method also returns a list of modes supported by the output.
 283         """
 284         try:
 285             xrandr_output = xrandr_output.replace("\r\n", "\n")
 286             match_object = re.search(XrandrOutput.XRANDR_OUTPUT_REGEXP, xrandr_output)
 287         except:
 288             raise AutorandrException("Parsing XRandR output failed, there is an error in the regular expression.",
 289                                      report_bug=True)
 290         if not match_object:
 291             debug = debug_regexp(XrandrOutput.XRANDR_OUTPUT_REGEXP, xrandr_output)
 292             raise AutorandrException("Parsing XRandR output failed, the regular expression did not match: %s" % debug,
 293                                      report_bug=True)
 294         remainder = xrandr_output[len(match_object.group(0)):]
 295         if remainder:
 296             raise AutorandrException("Parsing XRandR output failed, %d bytes left unmatched after "
 297                                      "regular expression, starting at byte %d with ..'%s'." %
 298                                      (len(remainder), len(match_object.group(0)), remainder[:10]),
 299                                      report_bug=True)
 300
 301         match = match_object.groupdict()
 302
 303         modes = []
 304         if match["modes"]:
 305             modes = []
 306             for mode_match in re.finditer(XrandrOutput.XRANDR_OUTPUT_MODES_REGEXP, match["modes"]):
 307                 if mode_match.group("name"):
 308                     modes.append(mode_match.groupdict())
 309             if not modes:
 310                 raise AutorandrException("Parsing XRandR output failed, couldn't find any display modes", report_bug=True)
 311
 312         options = {}
 313         if not match["connected"]:
 314             edid = None
 315         elif match["edid"]:
 316             edid = "".join(match["edid"].strip().split())
 317         else:
 318             edid = "%s-%s" % (XrandrOutput.EDID_UNAVAILABLE, match["output"])
 319
 320         if not match["width"]:
 321             options["off"] = None
 322         else:
 323             if match["mode_name"]:
 324                 options["mode"] = match["mode_name"]
 325             elif match["mode_width"]:
 326                 options["mode"] = "%sx%s" % (match["mode_width"], match["mode_height"])
 327             else:
 328                 if match["rotate"] not in ("left", "right"):
 329                     options["mode"] = "%sx%s" % (match["width"], match["height"])
 330                 else:
 331                     options["mode"] = "%sx%s" % (match["height"], match["width"])
 332             options["rotate"] = match["rotate"]
 333             if match["primary"]:
 334                 options["primary"] = None
 335             if match["reflect"] == "X":
 336                 options["reflect"] = "x"
 337             elif match["reflect"] == "Y":
 338                 options["reflect"] = "y"
 339             elif match["reflect"] == "X and Y":
 340                 options["reflect"] = "xy"
 341             options["pos"] = "%sx%s" % (match["x"], match["y"])
 342             if match["panning"]:
 343                 panning = [match["panning"]]
 344                 if match["tracking"]:
 345                     panning += ["/", match["tracking"]]
 346                     if match["border"]:
 347                         panning += ["/", match["border"]]
 348                 options["panning"] = "".join(panning)
 349             if match["transform"]:
 350                 transformation = ",".join(match["transform"].strip().split())
 351                 if transformation != "1.000000,0.000000,0.000000,0.000000,1.000000,0.000000,0.000000,0.000000,1.000000":
 352                     options["transform"] = transformation
 353                     if not match["mode_name"]:
 354                         # TODO We'd need to apply the reverse transformation here. Let's see if someone complains,
 355                         # I doubt that this special case is actually required.
 356                         print("Warning: Output %s has a transformation applied. Could not determine correct mode! "
 357                               "Using `%s'." % (match["output"], options["mode"]), file=sys.stderr)
 358             if match["gamma"]:
 359                 gamma = match["gamma"].strip()
 360                 # xrandr prints different values in --verbose than it accepts as a parameter value for --gamma
 361                 # Also, it is not able to work with non-standard gamma ramps. Finally, it auto-corrects 0 to 1,
 362                 # so we approximate by 1e-10.
 363                 gamma = ":".join([str(max(1e-10, round(1. / float(x), 3))) for x in gamma.split(":")])
 364                 options["gamma"] = gamma
 365             if match["rate"]:
 366                 options["rate"] = match["rate"]
 367
 368         return XrandrOutput(match["output"], edid, options), modes
 369
 370     @classmethod
 371     def from_config_file(cls, edid_map, configuration):
 372         "Instanciate an XrandrOutput from the contents of a configuration file"
 373         options = {}
 374         for line in configuration.split("\n"):
 375             if line:
 376                 line = line.split(None, 1)
 377                 if line and line[0].startswith("#"):
 378                     continue
 379                 options[line[0]] = line[1] if len(line) > 1 else None
 380
 381         edid = None
 382
 383         if options["output"] in edid_map:
 384             edid = edid_map[options["output"]]
 385         else:
 386             # This fuzzy matching is for legacy autorandr that used sysfs output names
 387             fuzzy_edid_map = [re.sub("(card[0-9]+|-)", "", x) for x in edid_map.keys()]
 388             fuzzy_output = re.sub("(card[0-9]+|-)", "", options["output"])
 389             if fuzzy_output in fuzzy_edid_map:
 390                 edid = edid_map[list(edid_map.keys())[fuzzy_edid_map.index(fuzzy_output)]]
 391             elif "off" not in options:
 392                 raise AutorandrException("Failed to find an EDID for output `%s' in setup file, required as `%s' "
 393                                          "is not off in config file." % (options["output"], options["output"]))
 394         output = options["output"]
 395         del options["output"]
 396
 397         return XrandrOutput(output, edid, options)
 398
 399     def edid_equals(self, other):
 400         "Compare to another XrandrOutput's edid and on/off-state, taking legacy autorandr behaviour (md5sum'ing) into account"
 401         if self.edid and other.edid:
 402             if len(self.edid) == 32 and len(other.edid) != 32 and not other.edid.startswith(XrandrOutput.EDID_UNAVAILABLE):
 403                 return hashlib.md5(binascii.unhexlify(other.edid)).hexdigest() == self.edid
 404             if len(self.edid) != 32 and len(other.edid) == 32 and not self.edid.startswith(XrandrOutput.EDID_UNAVAILABLE):
 405                 return hashlib.md5(binascii.unhexlify(self.edid)).hexdigest() == other.edid
 406             if "*" in self.edid:
 407                 return fnmatch.fnmatch(other.edid, self.edid)
 408             elif "*" in other.edid:
 409                 return fnmatch.fnmatch(self.edid, other.edid)
 410         return self.edid == other.edid
 411
 412     def __ne__(self, other):
 413         return not (self == other)
 414
 415     def __eq__(self, other):
 416         return self.edid_equals(other) and self.output == other.output and self.filtered_options == other.filtered_options
 417
 418     def verbose_diff(self, other):
 419         "Compare to another XrandrOutput and return a list of human readable differences"
 420         diffs = []
 421         if not self.edid_equals(other):
 422             diffs.append("EDID `%s' differs from `%s'" % (self.short_edid, other.short_edid))
 423         if self.output != other.output:
 424             diffs.append("Output name `%s' differs from `%s'" % (self.output, other.output))
 425         if "off" in self.options and "off" not in other.options:
 426             diffs.append("The output is disabled currently, but active in the new configuration")
 427         elif "off" in other.options and "off" not in self.options:
 428             diffs.append("The output is currently enabled, but inactive in the new configuration")
 429         else:
 430             for name in set(chain.from_iterable((self.options.keys(), other.options.keys()))):
 431                 if name not in other.options:
 432                     diffs.append("Option --%s %sis not present in the new configuration" %
 433                                  (name, "(= `%s') " % self.options[name] if self.options[name] else ""))
 434                 elif name not in self.options:
 435                     diffs.append("Option --%s (`%s' in the new configuration) is not present currently" %
 436                                  (name, other.options[name]))
 437                 elif self.options[name] != other.options[name]:
 438                     diffs.append("Option --%s %sis `%s' in the new configuration" %
 439                                  (name, "(= `%s') " % self.options[name] if self.options[name] else "", other.options[name]))
 440         return diffs
 441
 442
 443 def xrandr_version():
 444     "Return the version of XRandR that this system uses"
 445     if getattr(xrandr_version, "version", False) is False:
 446         version_string = os.popen("xrandr -v").read()
 447         try:
 448             version = re.search("xrandr program version\s+([0-9\.]+)", version_string).group(1)
 449             xrandr_version.version = Version(version)
 450         except AttributeError:
 451             xrandr_version.version = Version("1.3.0")
 452
 453     return xrandr_version.version
 454
 455
 456 def debug_regexp(pattern, string):
 457     "Use the partial matching functionality of the regex module to display debug info on a non-matching regular expression"
 458     try:
 459         import regex
 460         bounds = (0, len(string))
 461         while bounds[0] != bounds[1]:
 462             half = int((bounds[0] + bounds[1]) / 2)
 463             if half == bounds[0]:
 464                 break
 465             bounds = (half, bounds[1]) if regex.search(pattern, string[:half], partial=True) else (bounds[0], half - 1)
 466         partial_length = bounds[0]
 467         return ("Regular expression matched until position %d, ..'%s', and did not match from '%s'.." %
 468                 (partial_length, string[max(0, partial_length - 20):partial_length],
 469                  string[partial_length:partial_length + 10]))
 470     except ImportError:
 471         pass
 472     return "Debug information would be available if the `regex' module was installed."
 473
 474
 475 def parse_xrandr_output():
 476     "Parse the output of `xrandr --verbose' into a list of outputs"
 477     xrandr_output = os.popen("xrandr -q --verbose").read()
 478     if not xrandr_output:
 479         raise AutorandrException("Failed to run xrandr")
 480
 481     # We are not interested in screens
 482     xrandr_output = re.sub("(?m)^Screen [0-9].+", "", xrandr_output).strip()
 483
 484     # Split at output boundaries and instanciate an XrandrOutput per output
 485     split_xrandr_output = re.split("(?m)^([^ ]+ (?:(?:dis)?connected|unknown connection).*)$", xrandr_output)
 486     if len(split_xrandr_output) < 2:
 487         raise AutorandrException("No output boundaries found", report_bug=True)
 488     outputs = OrderedDict()
 489     modes = OrderedDict()
 490     for i in range(1, len(split_xrandr_output), 2):
 491         output_name = split_xrandr_output[i].split()[0]
 492         output, output_modes = XrandrOutput.from_xrandr_output("".join(split_xrandr_output[i:i + 2]))
 493         outputs[output_name] = output
 494         if output_modes:
 495             modes[output_name] = output_modes
 496
 497     return outputs, modes
 498
 499
 500 def load_profiles(profile_path):
 501     "Load the stored profiles"
 502
 503     profiles = {}
 504     for profile in os.listdir(profile_path):
 505         config_name = os.path.join(profile_path, profile, "config")
 506         setup_name = os.path.join(profile_path, profile, "setup")
 507         if not os.path.isfile(config_name) or not os.path.isfile(setup_name):
 508             continue
 509
 510         edids = dict([x.split() for x in (y.strip() for y in open(setup_name).readlines()) if x and x[0] != "#"])
 511
 512         config = {}
 513         buffer = []
 514         for line in chain(open(config_name).readlines(), ["output"]):
 515             if line[:6] == "output" and buffer:
 516                 config[buffer[0].strip().split()[-1]] = XrandrOutput.from_config_file(edids, "".join(buffer))
 517                 buffer = [line]
 518             else:
 519                 buffer.append(line)
 520
 521         for output_name in list(config.keys()):
 522             if config[output_name].edid is None:
 523                 del config[output_name]
 524
 525         profiles[profile] = {
 526             "config": config,
 527             "path": os.path.join(profile_path, profile),
 528             "config-mtime": os.stat(config_name).st_mtime,
 529         }
 530
 531     return profiles
 532
 533
 534 def get_symlinks(profile_path):
 535     "Load all symlinks from a directory"
 536
 537     symlinks = {}
 538     for link in os.listdir(profile_path):
 539         file_name = os.path.join(profile_path, link)
 540         if os.path.islink(file_name):
 541             symlinks[link] = os.readlink(file_name)
 542
 543     return symlinks
 544
 545
 546 def find_profiles(current_config, profiles):
 547     "Find profiles matching the currently connected outputs"
 548     detected_profiles = []
 549     for profile_name, profile in profiles.items():
 550         config = profile["config"]
 551         matches = True
 552         for name, output in config.items():
 553             if not output.edid:
 554                 continue
 555             if name not in current_config or not output.edid_equals(current_config[name]):
 556                 matches = False
 557                 break
 558         if not matches or any((name not in config.keys() for name in current_config.keys() if current_config[name].edid)):
 559             continue
 560         if matches:
 561             detected_profiles.append(profile_name)
 562     return detected_profiles
 563
 564
 565 def profile_blocked(profile_path, meta_information=None):
 566     """Check if a profile is blocked.
 567
 568     meta_information is expected to be an dictionary. It will be passed to the block scripts
 569     in the environment, as variables called AUTORANDR_<CAPITALIZED_KEY_HERE>.
 570     """
 571     return not exec_scripts(profile_path, "block", meta_information)
 572
 573
 574 def output_configuration(configuration, config):
 575     "Write a configuration file"
 576     outputs = sorted(configuration.keys(), key=lambda x: configuration[x].sort_key)
 577     for output in outputs:
 578         print(configuration[output].option_string, file=config)
 579
 580
 581 def output_setup(configuration, setup):
 582     "Write a setup (fingerprint) file"
 583     outputs = sorted(configuration.keys())
 584     for output in outputs:
 585         if configuration[output].edid:
 586             print(output, configuration[output].edid, file=setup)
 587
 588
 589 def save_configuration(profile_path, configuration):
 590     "Save a configuration into a profile"
 591     if not os.path.isdir(profile_path):
 592         os.makedirs(profile_path)
 593     with open(os.path.join(profile_path, "config"), "w") as config:
 594         output_configuration(configuration, config)
 595     with open(os.path.join(profile_path, "setup"), "w") as setup:
 596         output_setup(configuration, setup)
 597
 598
 599 def update_mtime(filename):
 600     "Update a file's mtime"
 601     try:
 602         os.utime(filename, None)
 603         return True
 604     except:
 605         return False
 606
 607
 608 def call_and_retry(*args, **kwargs):
 609     """Wrapper around subprocess.call that retries failed calls.
 610
 611     This function calls subprocess.call and on non-zero exit states,
 612     waits a second and then retries once. This mitigates #47,
 613     a timing issue with some drivers.
 614     """
 615     if "dry_run" in kwargs:
 616         dry_run = kwargs["dry_run"]
 617         del kwargs["dry_run"]
 618     else:
 619         dry_run = False
 620     kwargs_redirected = dict(kwargs)
 621     if not dry_run:
 622         if hasattr(subprocess, "DEVNULL"):
 623             kwargs_redirected["stdout"] = getattr(subprocess, "DEVNULL")
 624         else:
 625             kwargs_redirected["stdout"] = open(os.devnull, "w")
 626         kwargs_redirected["stderr"] = kwargs_redirected["stdout"]
 627     retval = subprocess.call(*args, **kwargs_redirected)
 628     if retval != 0:
 629         time.sleep(1)
 630         retval = subprocess.call(*args, **kwargs)
 631     return retval
 632
 633
 634 def get_fb_dimensions(configuration):
 635     width = 0
 636     height = 0
 637     for output in configuration.values():
 638         if "off" in output.options or not output.edid:
 639             continue
 640         # This won't work with all modes -- but it's a best effort.
 641         o_width, o_height = map(int, output.options["mode"].split("x"))
 642         if "transform" in output.options:
 643             a, b, c, d, e, f, g, h, i = map(float, output.options["transform"].split(","))
 644             w = (g * o_width + h * o_height + i)
 645             x = (a * o_width + b * o_height + c) / w
 646             y = (d * o_width + e * o_height + f) / w
 647             o_width, o_height = x, y
 648         if "pos" in output.options:
 649             o_left, o_top = map(int, output.options["pos"].split("x"))
 650             o_width += o_left
 651             o_height += o_top
 652         width = max(width, o_width)
 653         height = max(height, o_height)
 654     return int(width), int(height)
 655
 656
 657 def apply_configuration(new_configuration, current_configuration, dry_run=False):
 658     "Apply a configuration"
 659     outputs = sorted(new_configuration.keys(), key=lambda x: new_configuration[x].sort_key)
 660     if dry_run:
 661         base_argv = ["echo", "xrandr"]
 662     else:
 663         base_argv = ["xrandr"]
 664
 665     # There are several xrandr / driver bugs we need to take care of here:
 666     # - We cannot enable more than two screens at the same time
 667     #   See https://github.com/phillipberndt/autorandr/pull/6
 668     #   and commits f4cce4d and 8429886.
 669     # - We cannot disable all screens
 670     #   See https://github.com/phillipberndt/autorandr/pull/20
 671     # - We should disable screens before enabling others, because there's
 672     #   a limit on the number of enabled screens
 673     # - We must make sure that the screen at 0x0 is activated first,
 674     #   or the other (first) screen to be activated would be moved there.
 675     # - If an active screen already has a transformation and remains active,
 676     #   the xrandr call fails with an invalid RRSetScreenSize parameter error.
 677     #   Update the configuration in 3 passes in that case.  (On Haswell graphics,
 678     #   at least.)
 679     # - Some implementations can not handle --transform at all, so avoid it unless
 680     #   necessary. (See https://github.com/phillipberndt/autorandr/issues/37)
 681     # - Some implementations can not handle --panning without specifying --fb
 682     #   explicitly, so avoid it unless necessary.
 683     #   (See https://github.com/phillipberndt/autorandr/issues/72)
 684
 685     fb_dimensions = get_fb_dimensions(new_configuration)
 686     try:
 687         base_argv += ["--fb", "%dx%d" % fb_dimensions]
 688     except:
 689         # Failed to obtain frame-buffer size. Doesn't matter, xrandr will choose for the user.
 690         pass
 691
 692     auxiliary_changes_pre = []
 693     disable_outputs = []
 694     enable_outputs = []
 695     remain_active_count = 0
 696     for output in outputs:
 697         if not new_configuration[output].edid or "off" in new_configuration[output].options:
 698             disable_outputs.append(new_configuration[output].option_vector)
 699         else:
 700             if "off" not in current_configuration[output].options:
 701                 remain_active_count += 1
 702
 703             option_vector = new_configuration[output].option_vector
 704             if xrandr_version() >= Version("1.3.0"):
 705                 for option, off_value in (("transform", "none"), ("panning", "0x0")):
 706                     if option in current_configuration[output].options:
 707                         auxiliary_changes_pre.append(["--output", output, "--%s" % option, off_value])
 708                     else:
 709                         try:
 710                             option_index = option_vector.index("--%s" % option)
 711                             if option_vector[option_index + 1] == XrandrOutput.XRANDR_DEFAULTS[option]:
 712                                 option_vector = option_vector[:option_index] + option_vector[option_index + 2:]
 713                         except ValueError:
 714                             pass
 715
 716             enable_outputs.append(option_vector)
 717
 718     # Perform pe-change auxiliary changes
 719     if auxiliary_changes_pre:
 720         argv = base_argv + list(chain.from_iterable(auxiliary_changes_pre))
 721         if call_and_retry(argv, dry_run=dry_run) != 0:
 722             raise AutorandrException("Command failed: %s" % " ".join(argv))
 723
 724     # Disable unused outputs, but make sure that there always is at least one active screen
 725     disable_keep = 0 if remain_active_count else 1
 726     if len(disable_outputs) > disable_keep:
 727         argv = base_argv + list(chain.from_iterable(disable_outputs[:-1] if disable_keep else disable_outputs))
 728         if call_and_retry(argv, dry_run=dry_run) != 0:
 729             # Disabling the outputs failed. Retry with the next command:
 730             # Sometimes disabling of outputs fails due to an invalid RRSetScreenSize.
 731             # This does not occur if simultaneously the primary screen is reset.
 732             pass
 733         else:
 734             disable_outputs = disable_outputs[-1:] if disable_keep else []
 735
 736     # If disable_outputs still has more than one output in it, one of the xrandr-calls below would
 737     # disable the last two screens. This is a problem, so if this would happen, instead disable only
 738     # one screen in the first call below.
 739     if len(disable_outputs) > 0 and len(disable_outputs) % 2 == 0:
 740         # In the context of a xrandr call that changes the display state, `--query' should do nothing
 741         disable_outputs.insert(0, ['--query'])
 742
 743     # Enable the remaining outputs in pairs of two operations
 744     operations = disable_outputs + enable_outputs
 745     for index in range(0, len(operations), 2):
 746         argv = base_argv + list(chain.from_iterable(operations[index:index + 2]))
 747         if call_and_retry(argv, dry_run=dry_run) != 0:
 748             raise AutorandrException("Command failed: %s" % " ".join(argv))
 749
 750
 751 def is_equal_configuration(source_configuration, target_configuration):
 752     "Check if all outputs from target are already configured correctly in source"
 753     for output in target_configuration.keys():
 754         if (output not in source_configuration) or (source_configuration[output] != target_configuration[output]):
 755             return False
 756     return True
 757
 758
 759 def add_unused_outputs(source_configuration, target_configuration):
 760     "Add outputs that are missing in target to target, in 'off' state"
 761     for output_name, output in source_configuration.items():
 762         if output_name not in target_configuration:
 763             target_configuration[output_name] = XrandrOutput(output_name, output.edid, {"off": None})
 764
 765
 766 def remove_irrelevant_outputs(source_configuration, target_configuration):
 767     "Remove outputs from target that ought to be 'off' and already are"
 768     for output_name, output in source_configuration.items():
 769         if "off" in output.options:
 770             if output_name in target_configuration:
 771                 if "off" in target_configuration[output_name].options:
 772                     del target_configuration[output_name]
 773
 774
 775 def generate_virtual_profile(configuration, modes, profile_name):
 776     "Generate one of the virtual profiles"
 777     configuration = copy.deepcopy(configuration)
 778     if profile_name == "common":
 779         mode_sets = []
 780         for output, output_modes in modes.items():
 781             mode_set = set()
 782             if configuration[output].edid:
 783                 for mode in output_modes:
 784                     mode_set.add((mode["width"], mode["height"]))
 785             mode_sets.append(mode_set)
 786         common_resolution = reduce(lambda a, b: a & b, mode_sets[1:], mode_sets[0])
 787         common_resolution = sorted(common_resolution, key=lambda a: int(a[0]) * int(a[1]))
 788         if common_resolution:
 789             for output in configuration:
 790                 configuration[output].options = {}
 791                 if output in modes and configuration[output].edid:
 792                     modes_sorted = sorted(modes[output], key=lambda x: 0 if x["preferred"] else 1)
 793                     modes_filtered = [x for x in modes_sorted if (x["width"], x["height"]) == common_resolution[-1]]
 794                     mode = modes_filtered[0]
 795                     configuration[output].options["mode"] = mode['name']
 796                     configuration[output].options["pos"] = "0x0"
 797                 else:
 798                     configuration[output].options["off"] = None
 799     elif profile_name in ("horizontal", "vertical"):
 800         shift = 0
 801         if profile_name == "horizontal":
 802             shift_index = "width"
 803             pos_specifier = "%sx0"
 804         else:
 805             shift_index = "height"
 806             pos_specifier = "0x%s"
 807
 808         for output in configuration:
 809             configuration[output].options = {}
 810             if output in modes and configuration[output].edid:
 811                 def key(a):
 812                     score = int(a["width"]) * int(a["height"])
 813                     if a["preferred"]:
 814                         score += 10**6
 815                     return score
 816                 output_modes = sorted(modes[output], key=key)
 817                 mode = output_modes[-1]
 818                 configuration[output].options["mode"] = mode["name"]
 819                 configuration[output].options["rate"] = mode["rate"]
 820                 configuration[output].options["pos"] = pos_specifier % shift
 821                 shift += int(mode[shift_index])
 822             else:
 823                 configuration[output].options["off"] = None
 824     elif profile_name == "clone-largest":
 825         modes_unsorted = [output_modes[0] for output, output_modes in modes.items()]
 826         modes_sorted = sorted(modes_unsorted, key=lambda x: int(x["width"]) * int(x["height"]), reverse=True)
 827         biggest_resolution = modes_sorted[0]
 828         for output in configuration:
 829             configuration[output].options = {}
 830             if output in modes and configuration[output].edid:
 831                 def key(a):
 832                     score = int(a["width"]) * int(a["height"])
 833                     if a["preferred"]:
 834                         score += 10**6
 835                     return score
 836                 output_modes = sorted(modes[output], key=key)
 837                 mode = output_modes[-1]
 838                 configuration[output].options["mode"] = mode["name"]
 839                 configuration[output].options["rate"] = mode["rate"]
 840                 configuration[output].options["pos"] = "0x0"
 841                 scale = max(float(biggest_resolution["width"]) / float(mode["width"]),
 842                             float(biggest_resolution["height"]) / float(mode["height"]))
 843                 mov_x = (float(mode["width"]) * scale - float(biggest_resolution["width"])) / -2
 844                 mov_y = (float(mode["height"]) * scale - float(biggest_resolution["height"])) / -2
 845                 configuration[output].options["transform"] = "{},0,{},0,{},{},0,0,1".format(scale, mov_x, scale, mov_y)
 846             else:
 847                 configuration[output].options["off"] = None
 848     elif profile_name == "off":
 849         for output in configuration:
 850             for key in list(configuration[output].options.keys()):
 851                 del configuration[output].options[key]
 852             configuration[output].options["off"] = None
 853     return configuration
 854
 855
 856 def print_profile_differences(one, another):
 857     "Print the differences between two profiles for debugging"
 858     if one == another:
 859         return
 860     print("| Differences between the two profiles:")
 861     for output in set(chain.from_iterable((one.keys(), another.keys()))):
 862         if output not in one:
 863             if "off" not in another[output].options:
 864                 print("| Output `%s' is missing from the active configuration" % output)
 865         elif output not in another:
 866             if "off" not in one[output].options:
 867                 print("| Output `%s' is missing from the new configuration" % output)
 868         else:
 869             for line in one[output].verbose_diff(another[output]):
 870                 print("| [Output %s] %s" % (output, line))
 871     print("\\-")
 872
 873
 874 def exit_help():
 875     "Print help and exit"
 876     print(help_text)
 877     for profile in virtual_profiles:
 878         name, description = profile[:2]
 879         description = [description]
 880         max_width = 78 - 18
 881         while len(description[0]) > max_width + 1:
 882             left_over = description[0][max_width:]
 883             description[0] = description[0][:max_width] + "-"
 884             description.insert(1, "  %-15s %s" % ("", left_over))
 885         description = "\n".join(description)
 886         print("  %-15s %s" % (name, description))
 887     sys.exit(0)
 888
 889
 890 def exec_scripts(profile_path, script_name, meta_information=None):
 891     """"Run userscripts
 892
 893     This will run all executables from the profile folder, and global per-user
 894     and system-wide configuration folders, named script_name or residing in
 895     subdirectories named script_name.d.
 896
 897     If profile_path is None, only global scripts will be invoked.
 898
 899     meta_information is expected to be an dictionary. It will be passed to the block scripts
 900     in the environment, as variables called AUTORANDR_<CAPITALIZED_KEY_HERE>.
 901
 902     Returns True unless any of the scripts exited with non-zero exit status.
 903     """
 904     all_ok = True
 905     env = os.environ.copy()
 906     if meta_information:
 907         for key, value in meta_information.items():
 908             env["AUTORANDR_{}".format(key.upper())] = str(value)
 909
 910     # If there are multiple candidates, the XDG spec tells to only use the first one.
 911     ran_scripts = set()
 912
 913     user_profile_path = os.path.expanduser("~/.autorandr")
 914     if not os.path.isdir(user_profile_path):
 915         user_profile_path = os.path.join(os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")), "autorandr")
 916
 917     candidate_directories = [user_profile_path]
 918     for config_dir in os.environ.get("XDG_CONFIG_DIRS", "/etc/xdg").split(":"):
 919         candidate_directories.append(os.path.join(config_dir, "autorandr"))
 920     if profile_path:
 921         candidate_directories.append(profile_path)
 922
 923     for folder in candidate_directories:
 924         if script_name not in ran_scripts:
 925             script = os.path.join(folder, script_name)
 926             if os.access(script, os.X_OK | os.F_OK):
 927                 try:
 928                     all_ok &= subprocess.call(script, env=env) != 0
 929                 except:
 930                     raise AutorandrException("Failed to execute user command: %s" % (script,))
 931                 ran_scripts.add(script_name)
 932
 933         script_folder = os.path.join(folder, "%s.d" % script_name)
 934         if os.access(script_folder, os.R_OK | os.X_OK) and os.path.isdir(script_folder):
 935             for file_name in os.listdir(script_folder):
 936                 check_name = "d/%s" % (file_name,)
 937                 if check_name not in ran_scripts:
 938                     script = os.path.join(script_folder, file_name)
 939                     if os.access(script, os.X_OK | os.F_OK):
 940                         try:
 941                             all_ok &= subprocess.call(script, env=env) != 0
 942                         except:
 943                             raise AutorandrException("Failed to execute user command: %s" % (script,))
 944                         ran_scripts.add(check_name)
 945
 946     return all_ok
 947
 948
 949 def dispatch_call_to_sessions(argv):
 950     """Invoke autorandr for each open local X11 session with the given options.
 951
 952     The function iterates over all processes not owned by root and checks
 953     whether they have DISPLAY and XAUTHORITY variables set. It strips the
 954     screen from any variable it finds (i.e. :0.0 becomes :0) and checks whether
 955     this display has been handled already. If it has not, it forks, changes
 956     uid/gid to the user owning the process, reuses the process's environment
 957     and runs autorandr with the parameters from argv.
 958
 959     This function requires root permissions. It only works for X11 servers that
 960     have at least one non-root process running. It is susceptible for attacks
 961     where one user runs a process with another user's DISPLAY variable - in
 962     this case, it might happen that autorandr is invoked for the other user,
 963     which won't work. Since no other harm than prevention of automated
 964     execution of autorandr can be done this way, the assumption is that in this
 965     situation, the local administrator will handle the situation."""
 966
 967     X11_displays_done = set()
 968
 969     autorandr_binary = os.path.abspath(argv[0])
 970     backup_candidates = {}
 971
 972     def fork_child_autorandr(pwent, process_environ):
 973         print("Running autorandr as %s for display %s" % (pwent.pw_name, process_environ["DISPLAY"]))
 974         child_pid = os.fork()
 975         if child_pid == 0:
 976             # This will throw an exception if any of the privilege changes fails,
 977             # so it should be safe. Also, note that since the environment
 978             # is taken from a process owned by the user, reusing it should
 979             # not leak any information.
 980             os.setgroups([])
 981             os.setresgid(pwent.pw_gid, pwent.pw_gid, pwent.pw_gid)
 982             os.setresuid(pwent.pw_uid, pwent.pw_uid, pwent.pw_uid)
 983             os.chdir(pwent.pw_dir)
 984             os.environ.clear()
 985             os.environ.update(process_environ)
 986             os.execl(autorandr_binary, autorandr_binary, *argv[1:])
 987             os.exit(1)
 988         os.waitpid(child_pid, 0)
 989
 990     for directory in os.listdir("/proc"):
 991         directory = os.path.join("/proc/", directory)
 992         if not os.path.isdir(directory):
 993             continue
 994         environ_file = os.path.join(directory, "environ")
 995         if not os.path.isfile(environ_file):
 996             continue
 997         uid = os.stat(environ_file).st_uid
 998
 999         # The following line assumes that user accounts start at 1000 and that
1000         # no one works using the root or another system account. This is rather
1001         # restrictive, but de facto default. Alternatives would be to use the
1002         # UID_MIN from /etc/login.defs or FIRST_UID from /etc/adduser.conf;
1003         # but effectively, both values aren't binding in any way.
1004         # If this breaks your use case, please file a bug on Github.
1005         if uid < 1000:
1006             continue
1007
1008         process_environ = {}
1009         for environ_entry in open(environ_file).read().split("\0"):
1010             name, sep, value = environ_entry.partition("=")
1011             if name and sep:
1012                 if name == "DISPLAY" and "." in value:
1013                     value = value[:value.find(".")]
1014                 process_environ[name] = value
1015
1016         if "DISPLAY" not in process_environ:
1017             # Cannot work with this environment, skip.
1018             continue
1019
1020         # To allow scripts to detect batch invocation (especially useful for predetect)
1021         process_environ["AUTORANDR_BATCH_PID"] = str(os.getpid())
1022         process_environ["UID"] = str(uid)
1023
1024         display = process_environ["DISPLAY"]
1025
1026         if "XAUTHORITY" not in process_environ:
1027             # It's very likely that we cannot work with this environment either,
1028             # but keep it as a backup just in case we don't find anything else.
1029             backup_candidates[display] = process_environ
1030             continue
1031
1032         if display not in X11_displays_done:
1033             try:
1034                 pwent = pwd.getpwuid(uid)
1035             except KeyError:
1036                 # User has no pwd entry
1037                 continue
1038
1039             fork_child_autorandr(pwent, process_environ)
1040             X11_displays_done.add(display)
1041
1042     # Run autorandr for any users/displays which didn't have a process with
1043     # XAUTHORITY set.
1044     for display, process_environ in backup_candidates.items():
1045         if display not in X11_displays_done:
1046             try:
1047                 pwent = pwd.getpwuid(int(process_environ["UID"]))
1048             except KeyError:
1049                 # User has no pwd entry
1050                 continue
1051
1052             fork_child_autorandr(pwent, process_environ)
1053             X11_displays_done.add(display)
1054
1055
1056 def read_config(options, directory):
1057     """Parse a configuration config.ini from directory and merge it into
1058     the options dictionary"""
1059     config = configparser.ConfigParser()
1060     config.read(os.path.join(directory, "settings.ini"))
1061     if config.has_section("config"):
1062         for key, value in config.items("config"):
1063             options.setdefault("--%s" % key, value)
1064
1065 def main(argv):
1066     try:
1067         opts, args = getopt.getopt(argv[1:], "s:r:l:d:cfh",
1068                                    ["batch", "dry-run", "change", "default=", "save=", "remove=", "load=",
1069                                     "force", "fingerprint", "config", "debug", "skip-options=", "help",
1070                                     "current", "detected", "version"])
1071     except getopt.GetoptError as e:
1072         print("Failed to parse options: {0}.\n"
1073               "Use --help to get usage information.".format(str(e)),
1074               file=sys.stderr)
1075         sys.exit(posix.EX_USAGE)
1076
1077     options = dict(opts)
1078
1079     if "-h" in options or "--help" in options:
1080         exit_help()
1081
1082     if "--version" in options:
1083         print("autorandr " + __version__)
1084         sys.exit(0)
1085
1086     if "--current" in options and "--detected" in options:
1087         print("--current and --detected are mutually exclusive.", file=sys.stderr)
1088         sys.exit(posix.EX_USAGE)
1089
1090     # Batch mode
1091     if "--batch" in options:
1092         if ("DISPLAY" not in os.environ or not os.environ["DISPLAY"]) and os.getuid() == 0:
1093             dispatch_call_to_sessions([x for x in argv if x != "--batch"])
1094         else:
1095             print("--batch mode can only be used by root and if $DISPLAY is unset")
1096         return
1097     if "AUTORANDR_BATCH_PID" in os.environ:
1098         user = pwd.getpwuid(os.getuid())
1099         user = user.pw_name if user else "#%d" % os.getuid()
1100         print("autorandr running as user %s (started from batch instance)" % user)
1101
1102     profiles = {}
1103     profile_symlinks = {}
1104     try:
1105         # Load profiles from each XDG config directory
1106         # The XDG spec says that earlier entries should take precedence, so reverse the order
1107         for directory in reversed(os.environ.get("XDG_CONFIG_DIRS", "/etc/xdg").split(":")):
1108             system_profile_path = os.path.join(directory, "autorandr")
1109             if os.path.isdir(system_profile_path):
1110                 profiles.update(load_profiles(system_profile_path))
1111                 profile_symlinks.update(get_symlinks(system_profile_path))
1112                 read_config(options, system_profile_path)
1113         # For the user's profiles, prefer the legacy ~/.autorandr if it already exists
1114         # profile_path is also used later on to store configurations
1115         profile_path = os.path.expanduser("~/.autorandr")
1116         if not os.path.isdir(profile_path):
1117             # Elsewise, follow the XDG specification
1118             profile_path = os.path.join(os.environ.get("XDG_CONFIG_HOME", os.path.expanduser("~/.config")), "autorandr")
1119         if os.path.isdir(profile_path):
1120             profiles.update(load_profiles(profile_path))
1121             profile_symlinks.update(get_symlinks(profile_path))
1122             read_config(options, profile_path)
1123         # Sort by descending mtime
1124         profiles = OrderedDict(sorted(profiles.items(), key=lambda x: -x[1]["config-mtime"]))
1125     except Exception as e:
1126         raise AutorandrException("Failed to load profiles", e)
1127
1128     profile_symlinks = {k: v for k, v in profile_symlinks.items() if v in (x[0] for x in virtual_profiles) or v in profiles}
1129
1130     exec_scripts(None, "predetect")
1131     config, modes = parse_xrandr_output()
1132
1133     if "--fingerprint" in options:
1134         output_setup(config, sys.stdout)
1135         sys.exit(0)
1136
1137     if "--config" in options:
1138         output_configuration(config, sys.stdout)
1139         sys.exit(0)
1140
1141     if "--skip-options" in options:
1142         skip_options = [y[2:] if y[:2] == "--" else y for y in (x.strip() for x in options["--skip-options"].split(","))]
1143         for profile in profiles.values():
1144             for output in profile["config"].values():
1145                 output.set_ignored_options(skip_options)
1146         for output in config.values():
1147             output.set_ignored_options(skip_options)
1148
1149     if "-s" in options:
1150         options["--save"] = options["-s"]
1151     if "--save" in options:
1152         if options["--save"] in (x[0] for x in virtual_profiles):
1153             raise AutorandrException("Cannot save current configuration as profile '%s':\n"
1154                                      "This configuration name is a reserved virtual configuration." % options["--save"])
1155         try:
1156             profile_folder = os.path.join(profile_path, options["--save"])
1157             save_configuration(profile_folder, config)
1158             exec_scripts(profile_folder, "postsave", {"CURRENT_PROFILE": options["--save"], "PROFILE_FOLDER": profile_folder})
1159         except Exception as e:
1160             raise AutorandrException("Failed to save current configuration as profile '%s'" % (options["--save"],), e)
1161         print("Saved current configuration as profile '%s'" % options["--save"])
1162         sys.exit(0)
1163
1164     if "-r" in options:
1165         options["--remove"] = options["-r"]
1166     if "--remove" in options:
1167         if options["--remove"] in (x[0] for x in virtual_profiles):
1168             raise AutorandrException("Cannot remove profile '%s':\n"
1169                                      "This configuration name is a reserved virtual configuration." % options["--remove"])
1170         if options["--remove"] not in profiles.keys():
1171             raise AutorandrException("Cannot remove profile '%s':\n"
1172                                      "This profile does not exist." % options["--remove"])
1173         try:
1174             remove = True
1175             profile_folder = os.path.join(profile_path, options["--remove"])
1176             profile_dirlist = os.listdir(profile_folder)
1177             profile_dirlist.remove("config")
1178             profile_dirlist.remove("setup")
1179             if profile_dirlist:
1180                 print("Profile folder '%s' contains the following additional files:\n"
1181                       "---\n%s\n---" % (options["--remove"], "\n".join(profile_dirlist)))
1182                 response = input("Do you really want to remove profile '%s'? If so, type 'yes': " % options["--remove"]).strip()
1183                 if response != "yes":
1184                     remove = False
1185             if remove is True:
1186                 shutil.rmtree(profile_folder)
1187                 print("Removed profile '%s'" % options["--remove"])
1188             else:
1189                 print("Profile '%s' was not removed" % options["--remove"])
1190         except Exception as e:
1191             raise AutorandrException("Failed to remove profile '%s'" % (options["--remove"],), e)
1192         sys.exit(0)
1193
1194     detected_profiles = find_profiles(config, profiles)
1195     load_profile = False
1196
1197     if "-l" in options:
1198         options["--load"] = options["-l"]
1199     if "--load" in options:
1200         load_profile = options["--load"]
1201     elif len(args) == 1:
1202         load_profile = args[0]
1203     else:
1204         # Find the active profile(s) first, for the block script (See #42)
1205         current_profiles = []
1206         for profile_name in profiles.keys():
1207             configs_are_equal = is_equal_configuration(config, profiles[profile_name]["config"])
1208             if configs_are_equal:
1209                 current_profiles.append(profile_name)
1210         block_script_metadata = {
1211             "CURRENT_PROFILE": "".join(current_profiles[:1]),
1212             "CURRENT_PROFILES": ":".join(current_profiles)
1213         }
1214
1215         for profile_name in profiles.keys():
1216             if profile_blocked(os.path.join(profile_path, profile_name), block_script_metadata):
1217                 if "--current" not in options and "--detected" not in options:
1218                     print("%s (blocked)" % profile_name)
1219                 continue
1220             props = []
1221             if profile_name in detected_profiles:
1222                 props.append("(detected)")
1223                 if ("-c" in options or "--change" in options) and not load_profile:
1224                     load_profile = profile_name
1225             elif "--detected" in options:
1226                 continue
1227             if profile_name in current_profiles:
1228                 props.append("(current)")
1229             elif "--current" in options:
1230                 continue
1231             if "--current" in options or "--detected" in options:
1232                 print("%s" % (profile_name, ))
1233             else:
1234                 print("%s%s%s" % (profile_name, " " if props else "", " ".join(props)))
1235             if not configs_are_equal and "--debug" in options and profile_name in detected_profiles:
1236                 print_profile_differences(config, profiles[profile_name]["config"])
1237
1238     if "-d" in options:
1239         options["--default"] = options["-d"]
1240     if not load_profile and "--default" in options:
1241         load_profile = options["--default"]
1242
1243     if load_profile:
1244         if load_profile in profile_symlinks:
1245             if "--debug" in options:
1246                 print("'%s' symlinked to '%s'" % (load_profile, profile_symlinks[load_profile]))
1247             load_profile = profile_symlinks[load_profile]
1248
1249         if load_profile in (x[0] for x in virtual_profiles):
1250             load_config = generate_virtual_profile(config, modes, load_profile)
1251             scripts_path = os.path.join(profile_path, load_profile)
1252         else:
1253             try:
1254                 profile = profiles[load_profile]
1255                 load_config = profile["config"]
1256                 scripts_path = profile["path"]
1257             except KeyError:
1258                 raise AutorandrException("Failed to load profile '%s': Profile not found" % load_profile)
1259             if load_profile in detected_profiles and detected_profiles[0] != load_profile:
1260                 update_mtime(os.path.join(scripts_path, "config"))
1261         add_unused_outputs(config, load_config)
1262         if load_config == dict(config) and "-f" not in options and "--force" not in options:
1263             print("Config already loaded", file=sys.stderr)
1264             sys.exit(0)
1265         if "--debug" in options and load_config != dict(config):
1266             print("Loading profile '%s'" % load_profile)
1267             print_profile_differences(config, load_config)
1268
1269         remove_irrelevant_outputs(config, load_config)
1270
1271         try:
1272             if "--dry-run" in options:
1273                 apply_configuration(load_config, config, True)
1274             else:
1275                 script_metadata = {
1276                     "CURRENT_PROFILE": load_profile,
1277                     "PROFILE_FOLDER": scripts_path,
1278                 }
1279                 exec_scripts(scripts_path, "preswitch", script_metadata)
1280                 if "--debug" in options:
1281                     print("Going to run:")
1282                     apply_configuration(load_config, config, True)
1283                 apply_configuration(load_config, config, False)
1284                 exec_scripts(scripts_path, "postswitch", script_metadata)
1285         except AutorandrException as e:
1286             raise AutorandrException("Failed to apply profile '%s'" % load_profile, e, e.report_bug)
1287         except Exception as e:
1288             raise AutorandrException("Failed to apply profile '%s'" % load_profile, e, True)
1289
1290         if "--dry-run" not in options and "--debug" in options:
1291             new_config, _ = parse_xrandr_output()
1292             if not is_equal_configuration(new_config, load_config):
1293                 print("The configuration change did not go as expected:")
1294                 print_profile_differences(new_config, load_config)
1295
1296     sys.exit(0)
1297
1298
1299 def exception_handled_main(argv=sys.argv):
1300     try:
1301         main(sys.argv)
1302     except AutorandrException as e:
1303         print(e, file=sys.stderr)
1304         sys.exit(1)
1305     except Exception as e:
1306         if not len(str(e)):  # BdbQuit
1307             print("Exception: {0}".format(e.__class__.__name__))
1308             sys.exit(2)
1309
1310         print("Unhandled exception ({0}). Please report this as a bug at "
1311               "https://github.com/phillipberndt/autorandr/issues.".format(e),
1312               file=sys.stderr)
1313         raise
1314
1315
1316 if __name__ == '__main__':
1317     exception_handled_main()