Class: Yast::SystemSettingsClass
- Inherits:
-
Module
- Object
- Module
- Yast::SystemSettingsClass
- Defined in:
- ../../src/modules/SystemSettings.rb
Instance Method Summary (collapse)
- - (Object) Activate
-
- (Object) GetIOScheduler
Kernel param 'elevator'.
- - (Object) GetPossibleElevatorValues
- - (Object) GetSysRqKeysEnabled
- - (Object) main
- - (Object) Modified
- - (Object) Read
- - (Object) SetIOScheduler(io_scheduler)
- - (Object) SetSysRqKeysEnabled(enable_sysrq)
- - (Object) Write
Instance Method Details
- (Object) Activate
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# File '../../src/modules/SystemSettings.rb', line 109 def Activate if @ENABLE_SYSRQ != nil && Builtins.regexpmatch(@ENABLE_SYSRQ, "^[0-9]+$") Builtins.y2milestone("Activating SysRq config: %1", @ENABLE_SYSRQ) SCR.Execute( path(".target.bash"), Builtins.sformat("echo '%1' > /proc/sys/kernel/sysrq", @ENABLE_SYSRQ) ) else Builtins.y2warning( "Not activating invalid ENABLE_SYSRQ value: %1", @ENABLE_SYSRQ ) end if @elevator != nil Yast.import "Bootloader" new_elevator = @elevator == "" ? :missing : @elevator Builtins.y2milestone("Activating scheduler: %1", new_elevator) # set the scheduler Bootloader.modify_kernel_params("elevator" => new_elevator) # TODO FIXME: set the scheduler for all disk devices, # reboot is required to activate the new scheduler now end true end |
- (Object) GetIOScheduler
Kernel param 'elevator'
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# File '../../src/modules/SystemSettings.rb', line 167 def GetIOScheduler @elevator end |
- (Object) GetPossibleElevatorValues
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# File '../../src/modules/SystemSettings.rb', line 31 def GetPossibleElevatorValues # here are listed all known values of the 'elevator' variable ["cfq", "noop", "deadline"] end |
- (Object) GetSysRqKeysEnabled
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# File '../../src/modules/SystemSettings.rb', line 189 def GetSysRqKeysEnabled @ENABLE_SYSRQ != nil && @ENABLE_SYSRQ != "0" end |
- (Object) main
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# File '../../src/modules/SystemSettings.rb', line 16 def main textdomain "tune" Yast.import "Service" Yast.import "Mode" # Internal Data @ENABLE_SYSRQ = nil @elevator = nil # Internal Data @modified = false end |
- (Object) Modified
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# File '../../src/modules/SystemSettings.rb', line 36 def Modified Builtins.y2milestone("Modified: %1", @modified) @modified end |
- (Object) Read
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# File '../../src/modules/SystemSettings.rb', line 41 def Read @ENABLE_SYSRQ = Convert.to_string( SCR.Read(path(".etc.sysctl_conf.\"kernel.sysrq\"")) ) Builtins.y2milestone("SysRq enabled: %1", @ENABLE_SYSRQ) current_sysrq = Convert.to_string( SCR.Read(path(".target.string"), "/proc/sys/kernel/sysrq") ) # read just the first line current_sysrq = Ops.get(Builtins.splitstring(current_sysrq, "\n"), 0, "") if @ENABLE_SYSRQ != nil && current_sysrq != @ENABLE_SYSRQ Builtins.y2warning( "SysRq mismatch: sysconfig value: '%1', current: '%2'", @ENABLE_SYSRQ, current_sysrq ) end # display the current value if it not configured @ENABLE_SYSRQ = current_sysrq if @ENABLE_SYSRQ == nil # I have to admit that this is very ugly but it is here # to avoid of the very long starting time of the yast module # because the Storage module (which is imported by the Bootloader (imported by the SystemSettings module)) # has a Read() function call in its constructor. Yast.import "Bootloader" if Mode.normal # runtime - read the settings Bootloader.Read end # get 'elevator' option from the default section elevator_parameter = Bootloader.kernel_param(:common, "elevator") Builtins.y2milestone("elevator_parameter: %1", elevator_parameter) # Variable is not set if elevator_parameter == :missing @elevator = "" # Variable is set but has not parameter elsif elevator_parameter == :present Builtins.y2warning("'elevator' variable has to have some value") @elevator = "" # Variable is set but hasn't any known value elsif !Builtins.contains( GetPossibleElevatorValues(), Convert.to_string(elevator_parameter) ) Builtins.y2warning( "'elevator' variable has to have a value from %1 instead of being set to %2", GetPossibleElevatorValues(), elevator_parameter ) @elevator = "" # Variable is OK else @elevator = Convert.to_string(elevator_parameter) end Builtins.y2milestone("Global IO scheduler: %1", @elevator) true end |
- (Object) SetIOScheduler(io_scheduler)
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# File '../../src/modules/SystemSettings.rb', line 171 def SetIOScheduler(io_scheduler) # empty string = use the default scheduler if Builtins.contains(GetPossibleElevatorValues(), io_scheduler) || io_scheduler == "" @modified = true if @elevator != io_scheduler @elevator = io_scheduler else Builtins.y2error( "unknown IO scheduler '%1', use: %2", io_scheduler, GetPossibleElevatorValues() ) end nil end |
- (Object) SetSysRqKeysEnabled(enable_sysrq)
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# File '../../src/modules/SystemSettings.rb', line 193 def SetSysRqKeysEnabled(enable_sysrq) if enable_sysrq == nil Builtins.y2warning("enable_sysrq should be 'true' or 'false'") return end enable_sysrq_string = enable_sysrq ? "1" : "0" @modified = true if @ENABLE_SYSRQ != enable_sysrq_string @ENABLE_SYSRQ = enable_sysrq_string Builtins.y2milestone("SysRq was set to %1", @ENABLE_SYSRQ) nil end |
- (Object) Write
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# File '../../src/modules/SystemSettings.rb', line 139 def Write # writing SysRq settings if @ENABLE_SYSRQ != nil && Builtins.regexpmatch(@ENABLE_SYSRQ, "^[0-9]+$") # save the SysRq setting Builtins.y2milestone("Saving ENABLE_SYSRQ: %1", @ENABLE_SYSRQ) SCR.Write(path(".etc.sysctl_conf.\"kernel.sysrq\""), @ENABLE_SYSRQ) SCR.Write(path(".etc.sysctl_conf"), nil) else Builtins.y2warning( "Not writing invalid ENABLE_SYSRQ value: %1", @ENABLE_SYSRQ ) end # enable boot.sysctl service which sets the value after boot Service.Enable("boot.sysctl") # the bootloader configuration is written at the end of the first stage if Mode.normal # write the elevator setting Yast.import "Bootloader" Bootloader.Write end true end |