utc(1m)
NAME
utc - A dcecp object that manipulates UTC timestamps
SYNOPSIS
utc add timestamp relative_timestamp utc compare absolute_timestamp absolute_timestamp [-noinaccuracy] utc convert absolute_timestamp [-gmt] utc help [operation | -verbose] utc multiply relative_timestamp {integer | floating_point_factor} utc operations utc subtract timestamp timestamp
ARGUMENTS
absolute_timestamp
An International Organization for Standardization (ISO) compliant time format of the following form:
CCYY-MMDD-hh:mm:ss.fff[+|-]hh:mmIsss.fff
The Time Differential Factor (TDF) component [+|-]hh.mm, if present, indicates the offset from Universal Time Coordinated (UTC) time and implies local system time. The inaccuracy component Iss.fff, if present, specifies the duration of the time interval that contains the absolute time.
floating_point_factor
A floating point number such as 53.234.
integerA whole number such as 79.
operationThe name of the utc operation for which to display help information.
relative_timestamp
A Distributed Time Service (DTS) timestamp of the following form:
[-]DD-hh:mm:ss.fffIss.fff
Relative times often omit fractions of seconds (the leftmost .fff sequence) and generally lack an inaccuracy component (Iss.fff). For example, a relative time of 21 days, 8 hours, and 15 minutes is expressed as 21-08:15:00.
timestampA utc timestamp that can be a relative or absolute time. See the relative_timestamp and absolute_timestamp argument descriptions for the format of these timestamps.
DESCRIPTION
The utc object lets you add, compare, and convert timestamps in DTS and ISO formats.
OPERATIONS
utc add
Adds two timestamps. The syntax is as follows: utc add timestamp relative_timestamp The add operation returns the sum of two timestamps. The timestamps can be two relative times or an absolute time and a relative time. Privileges Required No special privileges are needed to use the utc add command. Examples
dcecp> utc add 1994-10-18-13:21:50.419-04:00I----- +0-00:02:00.000I-----
1994-10-18-13:23:50.419-04:00I-----
dcecp>
utc compare
Compares two absolute timestamps indicating the temporal order. The syntax is as follows: utc compare absolute_timestamp absolute_timestamp [-noinaccuracy] The compare operation compares two timestamps and returns -1 if the first is earlier, 1 if the second is earlier, and 0 if the difference is indeterminate. Specify the -noinaccuracy option to ignore inaccuracies in comparisons; in this case a return of 0 indicates the times are the same. Privileges Required No special privileges are needed to use the utc compare command. Examples
dcecp> utc compare 1994-10-18-13:22:32.816-04:00I----- \
> 1994-10-18-13:21:50.419-04:00I----- -noinaccuracy
1
dcecp>
utc convert
Converts a timestamp from UTC to local time. The syntax is as follows: utc convert absolute_timestamp [-gmt] The convert operation accepts a timestamp and returns another timestamp that expresses the same time in the local timezone. If called with the -gmt option it returns a Greenwich mean time (GMT) formatted timestamp. Privileges Required No special privileges are needed to use the utc convert command. Examples
dcecp> utc convert 1994-10-18-13:22:32.816-00:00I-----
1994-10-18-09:22:32.816-04:00I-----
dcecp>
utc help
Returns help information about the utc object and its operations. The syntax is as follows: utc help [operation | -verbose] Options
-verboseDisplays information about the utc object.
Used without an argument or option, the utc help command returns brief information about each utc operation. The optional operation argument is the name of an operation about which you want detailed information. Alternatively, you can use the -verbose option for more detailed information about the utc object itself. Privileges Required No special privileges are needed to use the utc help command. Examples
dcecp> utc help
add Adds a relative and absolute, or two relative, timestamps.
compare Compares two timestamps to determine which is earlier.
convert Converts a timestamp into the local timezone or GMT.
multiply Multiplies a relative timestamp by a number.
subtract Returns the difference between two timestamps.
help Prints a summary of command-line options.
operations Returns a list of the valid operations for this command.
dcecp>
utc multiply
Multiplies a relative time (a length of time) by an integer or floating point factor. The syntax is as follows: utc multiply relative_timestamp {integer | floating_point_factor} The multiply operation accepts two arguments: a relative timestamp and an integer or floating point factor. It multiplies the length of time (specified by the relative timestamp) by the integer or floating point factor, returning the product as a relative timestamp. Privileges Required No special privileges are needed to use the utc multiply command. Examples
dcecp> utc multiply +0-00:00:05.000I----- 3
+0-00:00:15.000I-----
dcecp>
utc operations
Returns a list of the operations supported by the utc object. The syntax is as follows: utc operations The list of available operations is in alphabetical order except for help and operations, which are listed last. Privileges Required No special privileges are needed to use the utc operations command. Examples
dcecp> utc operations
add compare convert multiply subtract help operations
dcecp>
utc subtract
Subtracts one timestamp from another, returning the difference as a relative timestamp. The syntax is as follows: utc subtract timestamp timestamp The subtract operation returns the difference between two timestamps that express either an absolute time and a relative time, two relative times, or two absolute times. The return value is a relative timestamp. Privileges Required No special privileges are needed to use the utc subtract command. Examples
dcecp> utc subtract 1994-10-18-13:22:32.816-00:00I----- +0-00:00:15.000I-----
1994-10-18-13:22:17.816+00:00I-----
dcecp>
RELATED INFORMATION
Commands:
dcecp(1m), dcecp_clock(1m), dcecp_dts(1m), dts_intro(1m), dtsd(1m).
Hewlett-Packard Company — OSF DCE 1.1/HP DCE 1.5