diff --git a/daemons/fenced/fence_watchdog.in b/daemons/fenced/fence_watchdog.in index 700065e0ec..eefa7395e1 100755 --- a/daemons/fenced/fence_watchdog.in +++ b/daemons/fenced/fence_watchdog.in @@ -1,284 +1,284 @@ #!@PYTHON@ """Dummy watchdog fence agent for providing meta-data for the pacemaker internal agent """ __copyright__ = "Copyright 2012-2021 the Pacemaker project contributors" __license__ = "GNU General Public License version 2 or later (GPLv2+) WITHOUT ANY WARRANTY" import io import os import re import sys import atexit import getopt AGENT_VERSION = "1.0.0" SHORT_DESC = "Dummy watchdog fence agent" LONG_DESC = """fence_watchdog just provides meta-data - actual fencing is done by the pacemaker internal watchdog agent.""" ALL_OPT = { "version" : { "getopt" : "V", "longopt" : "version", "help" : "-V, --version Display version information and exit", "required" : "0", "shortdesc" : "Display version information and exit", "order" : 53 }, "help" : { "getopt" : "h", "longopt" : "help", "help" : "-h, --help Display this help and exit", "required" : "0", "shortdesc" : "Display help and exit", "order" : 54 }, "action" : { "getopt" : "o:", "longopt" : "action", "help" : "-o, --action=[action] Action: metadata", "required" : "1", "shortdesc" : "Fencing Action", "default" : "metadata", "order" : 1 }, "nodename" : { "getopt" : "N:", "longopt" : "nodename", "help" : "-N, --nodename Node name of fence victim (ignored)", "required" : "0", "shortdesc" : "Ignored", "order" : 2 }, "plug" : { "getopt" : "n:", "longopt" : "plug", "help" : "-n, --plug=[id] Physical plug number on device (ignored)", "required" : "1", "shortdesc" : "Ignored", "order" : 4 } } def agent(): """ Return name this file was run as. """ return os.path.basename(sys.argv[0]) def fail_usage(message): """ Print a usage message and exit. """ sys.exit("%s\nPlease use '-h' for usage" % message) def show_docs(options): """ Handle informational options (display info and exit). """ device_opt = options["device_opt"] if "-h" in options: usage(device_opt) sys.exit(0) if "-o" in options and options["-o"].lower() == "metadata": metadata(device_opt, options) sys.exit(0) if "-V" in options: print(AGENT_VERSION) sys.exit(0) def sorted_options(avail_opt): """ Return a list of all options, in their internally specified order. """ sorted_list = [(key, ALL_OPT[key]) for key in avail_opt] sorted_list.sort(key=lambda x: x[1]["order"]) return sorted_list def usage(avail_opt): """ Print a usage message. """ print(LONG_DESC) print() print("Usage:") print("\t" + agent() + " [options]") print("Options:") for dummy, value in sorted_options(avail_opt): if len(value["help"]) != 0: print(" " + value["help"]) def metadata(avail_opt, options): """ Print agent metadata. """ print(""" %s """ % (agent(), SHORT_DESC, LONG_DESC)) for option, dummy in sorted_options(avail_opt): if "shortdesc" in ALL_OPT[option]: print(' ') + '" required="' + ALL_OPT[option]["required"] + '">') default = "" default_name_arg = "-" + ALL_OPT[option]["getopt"][:-1] default_name_no_arg = "-" + ALL_OPT[option]["getopt"] if "default" in ALL_OPT[option]: default = 'default="%s"' % str(ALL_OPT[option]["default"]) elif default_name_arg in options: if options[default_name_arg]: try: default = 'default="%s"' % options[default_name_arg] except TypeError: ## @todo/@note: Currently there is no clean way how to handle lists ## we can create a string from it but we can't set it on command line default = 'default="%s"' % str(options[default_name_arg]) elif default_name_no_arg in options: default = 'default="true"' mixed = ALL_OPT[option]["help"] ## split it between option and help text res = re.compile(r"^(.*--\S+)\s+", re.IGNORECASE | re.S).search(mixed) if None != res: mixed = res.group(1) mixed = mixed.replace("<", "<").replace(">", ">") print(' ') if ALL_OPT[option]["getopt"].count(":") > 0: print(' ') else: print(' ') print(' ' + ALL_OPT[option]["shortdesc"] + '') print(' ') print(' \n ') print(' ') print(' ') print(' ') print(' ') print(' ') print(' ') print(' ') print('') def option_longopt(option): """ Return the getopt-compatible long-option name of the given option. """ if ALL_OPT[option]["getopt"].endswith(":"): return ALL_OPT[option]["longopt"] + "=" else: return ALL_OPT[option]["longopt"] def opts_from_command_line(argv, avail_opt): """ Read options from command-line arguments. """ # Prepare list of options for getopt getopt_string = "" longopt_list = [] for k in avail_opt: if k in ALL_OPT: getopt_string += ALL_OPT[k]["getopt"] else: fail_usage("Parse error: unknown option '" + k + "'") if k in ALL_OPT and "longopt" in ALL_OPT[k]: longopt_list.append(option_longopt(k)) try: opt, dummy = getopt.gnu_getopt(argv, getopt_string, longopt_list) except getopt.GetoptError as error: fail_usage("Parse error: " + error.msg) # Transform longopt to short one which are used in fencing agents old_opt = opt opt = {} for old_option in dict(old_opt).keys(): if old_option.startswith("--"): for option in ALL_OPT.keys(): if "longopt" in ALL_OPT[option] and "--" + ALL_OPT[option]["longopt"] == old_option: opt["-" + ALL_OPT[option]["getopt"].rstrip(":")] = dict(old_opt)[old_option] else: opt[old_option] = dict(old_opt)[old_option] return opt def opts_from_stdin(avail_opt): """ Read options from standard input. """ opt = {} name = "" for line in sys.stdin.readlines(): line = line.strip() if line.startswith("#") or (len(line) == 0): continue (name, value) = (line + "=").split("=", 1) value = value[:-1] if name not in avail_opt: print("Parse error: Ignoring unknown option '%s'" % line, file=sys.stderr) continue if ALL_OPT[name]["getopt"].endswith(":"): opt["-"+ALL_OPT[name]["getopt"].rstrip(":")] = value elif value.lower() in ["1", "yes", "on", "true"]: opt["-"+ALL_OPT[name]["getopt"]] = "1" return opt def process_input(avail_opt): """ Set standard environment variables, and parse all options. """ # Set standard environment os.putenv("LANG", "C") os.putenv("LC_ALL", "C") # Read options from command line or standard input if len(sys.argv) > 1: return opts_from_command_line(sys.argv[1:], avail_opt) else: return opts_from_stdin(avail_opt) def atexit_handler(): """ Close stdout on exit. """ try: sys.stdout.close() os.close(1) except IOError: sys.exit("%s failed to close standard output" % agent()) def main(): """ Make it so! """ device_opt = ALL_OPT.keys() ## Defaults for fence agent atexit.register(atexit_handler) options = process_input(device_opt) options["device_opt"] = device_opt show_docs(options) print("Watchdog fencing may be initiated only by the cluster, not this agent.", file=sys.stderr) sys.exit(1) if __name__ == "__main__": main()