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Test Your Knowledge in Computers #503
Difficulty: Easy
The flow of control (or simply control flow) is how a program processes its instructions.
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pmconfig(1m) [bsd man page]

pmconfig(1M)						  System Administration Commands					      pmconfig(1M)

pmconfig - Configure the Power Management system SYNOPSIS
/usr/sbin/pmconfig [-r] DESCRIPTION
The pmconfig utility sets the Power Management and suspend-resume configuration. User has permission to change Power Management configu- ration using pmconfig only if he is allowed to do so according to PMCHANGEPERM keyword of /etc/default/power. User has permission to change the suspend-resume configuration using pmconfig only if he is allowed to do so according to the CPRCHANGEPERM keyword of /etc/default/power. See FILES section below for a description of the PMCHANGEPERM and CPRCHANGEPERM keywords of /etc/default/power. Based on user permissions, pmconfig first resets the Power Management and/or suspend-resume state back to its default and then reads the new Power Management and/or suspend-resume configuration from /etc/power.conf and issues the commands to activiate the new configu- ration. The pmconfig utility is run at system boot. This utility can also be run from the command line after manual changes have been made to the /etc/power.conf file. For editing changes made to the /etc/power.conf file to take effect, users must run pmconfig. The preferred interface for changing Power Management and suspend-resume configuration is dtpower(1M). OPTIONS
The following options are supported: -r Reset Power Management and suspend-resume state to default and exit. User must have both Power Management and suspend-resume configuration permission for this option. EXIT STATUS
The following exit values are returned: 0 Upon successful completion >0 An error occurred FILES
/etc/power.conf System Power Management configuration file /etc/default/power File that controls permissions for system's Power Management and suspend-resume features. The PMCHANGEPERM key- board controls the Power Management configuration permissions, while the CPRCHANGEPERM keyword controls the sus- pend-resume configuration permissions. Allowed values are: all Any user can change the configuration. - No one except super-user can change the configuration. <user1, user2,...> A user in this user list or a super-user can change the configuration. The user list is a space and/or comma (,) separated list. You must enclose the list in < and > characters. console-owner A user who owns the system console device node or a super-user can change the configuration. The default values are PMCHANGEPERM=console-owner and CPRCHANGEPERM=console-owner. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpmu | +-----------------------------+-----------------------------+ |Interface stability |Unstable | +-----------------------------+-----------------------------+ SEE ALSO
svcs(1), powerd(1M), power.conf(4), svcadm(1M), attributes(5), smf(5), cpr(7), pm(7D) Using Power Management NOTES
The pmconfig service is managed by the service management facility, smf(5), under the service identifier: svc:/system/power:default Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser- vice's status can be queried using the svcs(1) command. DIAGNOSTICS
If the program cannot open the configuration file, it prints an error message to standard error. If the program encounters a syntax error in the configuration file, it prints an error message and the line number of the error in the configuration file. It then skips the rest of the information on that line and processes the next line. Any configuration information already processed on the line containing the error is used. If user does not have permission to change Power Management and/or suspend-resume configuration, and configuration file has entries for which user doesn't have permission, it process the entries for which user has permissions and prints error on rest. SunOS 5.10 12 Aug 2004 pmconfig(1M)

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