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Technical Reference: Base Operating System and Extensions, Volume 1


pmlib_request_parameter Subroutine

Purpose

Queries and controls the PM system parameters.

Library

PM (Power Management) Library (libpm.a)

Syntax

#include <pmlib.h>

int pmlib_request_parameter(ctrl, arg);
int ctrl;
caddr_t *arg;

The pmlib_request_parameter subroutines queries and changes the PM system or devices parameters. Any of these queries can be called by any user, but the set can be called only by root.

Parameters

ctrl
Determines the action to be taken by the pmlib_request_parameter subroutine and is one of the following values:

PMLIB_QUERY_SYSTEM_IDLE_TIME
Queries system idle timer.

PMLIB_SET_SYSTEM_IDLE_TIME
Sets system idle timer.

PMLIB_QUERY_DEVICE_INFO
Queries device information.

PMLIB_SET_DEVICE_INFO
Sets device information.

PMLIB_QUERY_SYSTEM_IDLE_ACTION
Queries action for system idle.

PMLIB_SET_SYSTEM_IDLE_ACTION
Sets action for system idle.

PMLIB_QUERY_LID_CLOSE_ACTION
Queries action for lid close.

PMLIB_SET_LID_CLOSE_ACTION
Sets action for lid close.

PMLIB_QUERY_MAIN_SWITCH_ACTION
Queries action for main switch.

PMLIB_SET_MAIN_SWITCH_ACTION
Sets action for main switch.

PMLIB_QUERY_LOW_BATTERY_ACTION
Queries action for low battery.

PMLIB_SET_LOW_BATTERY_ACTION
Sets action for low battery.

PMLIB_QUERY_PERMISSION
Queries the action permitted to any user.

PMLIB_SET_PERMISSION
Sets the action permitted to any user.

PMLIB_QUERY_BEEP
Queries whether beep is enabled or not.

PMLIB_SET_BEEP
Sets whether beep is enabled or not.

PMLIB_QUERY_RINGING_RESUME
Queries if ringing resume is enabled or not.

PMLIB_SET_RINGING_RESUME
Sets if ringing resume is enabled or not.

PMLIB_QUERY_RESUME_TIME
Queries resume time.

PMLIB_SET_RESUME_TIME
Sets resume time.

PMLIB_QUERY_DURATION_TO_HIBERNATION
Queries duration to hibernation.

PMLIB_SET_DURATION_TO_HIBERNATION
Sets duration to hibernation.

PMLIB_QUERY_SPECIFIED_TIME
Queries specified time.

PMLIB_SET_SPECIFIED_TIME
Sets specified time.

PMLIB_QUERY_SPECIFIED_TIME_ACTION
Queries action for specified time.

PMLIB_SET_SPECIFIED_TIME_ACTION
Sets action for specified time.

PMLIB_QUERY_DEVICE_NUMBER
Queries number of PM aware devices.

PMLIB_QUERY_DEVICE_NAMES
Queries the list of names of PM aware devices.

PMLIB_QUERY_SUPPORTED_STATES
Queries the system states supported.

PMLIB_QUERY_KILL_LFT_SESSION
Queries if LFT session is terminated.

PMLIB_SET_KILL_LFT_SESSION
Sets if LFT session is terminated.

PMLIB_QUERY_KILL_TTY_SESSION
Queries if TTY session is terminated.

PMLIB_SET_KILL_TTY_SESSION
Sets if TTY session is terminated.

PMLIB_QUERY_PASSWD_ON_RESUME
Queries if resume password is required.

PMLIB_SET_PASSWD_ON_RESUME
Sets if resume password is required.

PMLIB_QUERY_KILL_SYNCD
Queries if syncd is terminated at standby.

PMLIB_SET_KILL_SYNCD
Sets if syncd is terminated at system standby.

 

When ctrl is PMLIB_QUERY_SYSTEM_IDLE_TIMER, arg points to an integer that is the system idle timer value when function is returned.

When ctrl is PMLIB_SET_SYSTEM_IDLE_TIMER, arg points to an integer that is the system idle timer value to set. The system idle timer value should be within the range from 60 to 7200. If 0 is set, the system-idle check is disabled.

When ctrl is PMLIB_QUERY_DEVICE_INFO, arg points to the following pmlib_device_info_t structure. The device name needs to be specified in the name[16] member. Then, mode, idle_time, standby_time, idle_time1 and idle_time2 members are set when function is returned.

typedef struct _pmlib_device_info{
   char name[16];      /*name of device*/
   int mode;           /*device mode*/
   int attribute;      /*device attribute*/
   int idle_time;      /*idle timer value during system PM enable*/
   int standby_time;   /*idle timer value during system standby*/
   int idle_time1;     /*idle timer value for DPMS suspend*/
   int idle_time2;     /*idle timer value for DPMS off*/
   char reserved[24];  /*reserved area for future use*/
} pmlib_device_info_t;

When ctrl is PMLIB_SET_DEVICE_INFO, arg points to pmlib_device_info_t structure, and the devicename to name[16]. idle_time, standby_time, idle_time1 and idle_time2 members need to be set. The value of idle_time is within the range from 60 to 7200. If idle_time, standby_time, idle_time1, or idle_time2 is set to -1, the current value is not changed.

When ctrl is PMLIB_QUERY_SYSTEM_IDLE_ACTION, arg points to an integer that is the action for system-idle timer expiration when the function is returned. Possible values for action are as follows:

PMLIB_NONE State doesn't change
PMLIB_SYSTEM_FULL_ON Full on
PMLIB_SYSTEM_ENABLE PM enable
PMLIB_SYSTEM_STANDBY Stand by
PMLIB_SYSTEM_SUSPEND Suspend
PMLIB_SYSTEM_HIBERNATION Hibernation
PMLIB_SYSTEM_SHUTDOWN Shutdown

When ctrl is PMLIB_SET_SYSTEM_IDLE_ACTION, arg points to an integer that is the action to be set for system-idle timer expiration. The value for action should be one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_QUERY_LID_CLOSE_ACTION, arg points to an integer that is the action for lid close when the function is returned. Possible values for action are one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_SET_LID_CLOSE_ACTION, arg points to an integer that is the action to be set for lid close. The value for action should be one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_QUERY_MAIN_SWITCH_ACTION, arg points to an integer that is the action for the main switch when the function is returned. Possible values for action are one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_SET_MAIN_SWITCH_ACTION, arg points to an integer that is the action to set for the main switch. The value for action should be one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_QUERY_LOW_BATTERY_ACTION, arg points to an integer that is the action for the low battery when the function is returned. Possible values for action are one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_SET_LOW_BATTERY_ACTION, arg points to an integer that is the action to be set for the low battery. The value for action should be one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_QUERY_PERMISSION, arg points to an integer that is the action for allowed to any user when the function is returned. Possible values for action are bit-wise OR of following values:

PMLIB_SYSTEM_FULL_ON Full on
PMLIB_SYSTEM_ENABLE PM enable
PMLIB_SYSTEM_STANDBY Standby
PMLIB_SYSTEM_SUSPEND Suspend
PMLIB_SYSTEM_HIBERNATION Hibernation
PMLIB_SYSTEM_SHUTDOWN Shutdown

When ctrl is PMLIB_SET_PERMISSION, arg points to an integer that is the action to be set for allowed to any user. Possible values for action are bit-wise OR of following values:

PMLIB_SYSTEM_FULL_ON Full on
PMLIB_SYSTEM_ENABLE PM enable
PMLIB_SYSTEM_STANDBY Standby
PMLIB_SYSTEM_SUSPEND Suspend
PMLIB_SYSTEM_HIBERNATION Hibernation
PMLIB_SYSTEM_SHUTDOWN Shutdown

When ctrl is PMLIB_QUERY_BEEP, arg points to an integer that is PMLIB_ON or PMLIB_OFF for beep on/off.

When ctrl is PMLIB_SET_BEEP, arg points to an integer that is PMLIB_ON or PMLIB_OFF to set for beep on/off.

When ctrl is PMLIB_QUERY_RINGING_RESUME, arg points to an integer that is PMLIB_ON or PMLIB_OFF for ringing resume on/off when the function is returned.

When ctrl is PMLIB_SET_RINGING_RESUME, arg points to an integer that is PMLIB_ON or PMLIB_OFF for ringing resume on/off.

When ctrl is PMLIB_QUERY_RESUME_TIME, arg points to an integer that is the time for resume when the function is returned. The integer value is the time in seconds since 00:00:00 GMT, January 1, 1970.

When ctrl is PMLIB_SET_RESUME_TIME, arg points to an integer that is the time for resume to be set. The integer value should be the time in seconds since 00:00:00 GMT, January 1, 1970.

When ctrl is PMLIB_QUERY_DURATION_TO_HIBERNATION, arg points to an integer that is the duration to hibernation in seconds when the function is returned.

When ctrl is PMLIB_SET_DURATION_TO_HIBERNATION, arg points to an integer that is the duration to hibernation in seconds to be set.

When ctrl is PMLIB_QUERY_SPECIFIED_TIME, arg points to an integer that is the specified time when the function is returned. The integer value is the time in seconds since 00:00:00 GMT, January 1, 1970.

When ctrl is PMLIB_SET_SPECIFIED_TIME, arg points to an integer that is the specified time to be set. The integer value should be the time in seconds since 00:00:00 GMT, January 1, 1970.

When ctrl is PMLIB_QUERY_SPECIFIED_TIME_ACTION, arg points to an integer that is the action for the specified time when the function is returned. Possible values for action is one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_SET_SPECIFIED_TIME_ACTION, arg points to an integer that is the action to be set for the specified time. The value for action should be one of the values described at PMLIB_QUERY_SYSTEM_IDLE_ACTION.

When ctrl is PMLIB_QUERY_DEVICE_NUMBER, arg points to an integer that is the number of PM aware device drivers when the function is returned.

When ctrl is PMLIB_QUERY_DEVICE_NAMES, arg points to the head of array of name[16] that is the names of PM aware device drivers when the function is returned.

When ctrl is PMLIB_QUERY_SUPPORTED_STATES, arg points to an integer that is the action supported when the function is returned. The integer is bit-wise OR of following values:

PMLIB_SYSTEM_FULL_ON Full on
PMLIB_SYSTEM_ENABLE PM enable
PMLIB_SYSTEM_STANDBY Standby
PMLIB_SYSTEM_SUSPEND Suspend
PMLIB_SYSTEM_HIBERNATION Hibernation
PMLIB_SYSTEM_SHUTDOWN Shutdown

When ctrl is PMLIB_QUERY_KILL_LFT_SESSION, arg points to an integer that is PMLIB_ON or PMLIB_OFF to show if LFT session is terminated.

When ctrl is PMLIB_SET_KILL_LFT_SESSION, arg points to an integer that is PMLIB_ON or PMLIB_OFF to set if LFT session is terminated.

When ctrl is PMLIB_QUERY_KILL_TTY_SESSION, arg points to an integer that is PMLIB_ON or PMLIB_OFF to show if TTY sessions are terminated.

When ctrl is PMLIB_SET_KILL_TTY_SESSION, arg points to an integer that is PMLIB_ON or PMLIB_OFF to set if TTY sessions are terminated.

When ctrl is PMLIB_QUERY_PASSWD_ON_RESUME, arg points to an integer that is PMLIB_ON or PMLIB_OFF to show if resume password is required.

When ctrl is PMLIB_SET_PASSWD_ON_RESUME, arg points to an integer that is PMLIB_ON or PMLIB_OFF to set if resume password is required.

When ctrl is PMLIB_QUERY_KILL_SYNCD, arg points to an integer that is PMLIB_ON or PMLIB_OFF to show if sync daemon is terminated during system standby.

When ctrl is PMLIB_SET_KILL_SYNCD, arg points to an integer that is PMLIB_ON or PMLIB_OFF to set if sync daemon is terminated during system standby.

Return Values

Upon successful completion, PMLIB_SUCCESS is returned. If the pmlib_request_state subroutine fails, PMLIB_ERROR is returned and errno variable is set to an error code.

Error Codes


ESRCH PM daemon is not running.
EINVAL Invalid argument.
EPERM Missing privilege.
ENOMEM Insufficient storage.

Implementation Specifics

The pmlib_request_parameter subroutine is part of the Base Operation System (BOS) Runtime.

Related Information

The pmlib_get_event_notice (pmlib_get_event_notice Subroutine) subroutine, pmlib_request_state (pmlib_request_state Subroutine) subroutine, pmlib_request_battery (pmlib_request_battery Subroutine) subroutine, pmlib_register_application (pmlib_register_application Subroutine) subroutine.


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