date impacts summary
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Now that the Year 2000 transition has passed, it is important to
continue to handle dates properly in software development. Other date
transitions are coming. Software which was quickly patched to survive
the Year 2000 transition should be properly repaired. And software
shelved during the transition time and later brought back to
development may still need to be scanned for problems.
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To help you locate date-related problems in your software, the STK may
include the following types of impacts:
- Impacts for APIs that are date-related. These interfaces indicate that
the software is performing date processing, which could cause date-related
problems:
- For C and C++, asctime, ctime, daylight, difftime, ftime,
gettimeofday, gmtime, localtime, mktime, settimeofday, stime, strftime,
time, time_t, timeb, timeval, timezone, tm, tzname, tzset, execl,
execlp, execve, execle, execv, execvp, popen, system
- For Fortran, CTIME, FDATE, DATE_AND_TIME, IDATE, GMTIME,
LTIME, TIME
- For COBOL, CURRENT-DATE, DATE-OF-INTEGER, WHEN-COMPILED,
INTEGER-OF-DATE, INTEGER-OF-DAY, DAY-OF-WEEK
Many of the Date impacts are warnings, so you miss seeing them if you
exclude Non-critical (Nc) or Non-critical Warning (NcWn) impacts from your
scans.
In addition to the date-related impacts described above, check your
software for other common causes of date-related problems:
- Less than four digits used to represent years. Applications that store
only the last two digits of the year may not function correctly for dates
on or after the year 2000. For example, if dates are compared as strings,
01/01/2000 appears as 01/01/00, which is less than 12/31/99.
- Existing dates (such as 9/9/99) used as meta-values to represent
information such as an expired or invalid date.
- Date representations that have a limited range of valid values. For
example, the representation used by the C/C++ type time_t is
only valid from 1901 to 2038.
The minimum date supported by both 32-bit and 64-bit HP-UX 11.x is
1901/12/13 20:45:52 UTC. The maximum date supported by 32-bit HP-UX 11.x is
2038/01/19 03:14:07 UTC, and the maximum date supported by the 64-bit
application development environment is 9999/03/02 06:00:00 UTC. A 4-digit
year must be used with getdate for dates beyond the 21st
century.
Note: To include only Date impacts when running the
scansummary and scandetail tools, use the option:
+C DA
To exclude these impacts, use the option:
-C DA
For more information on filtering output in reports, see Customizing Your Scan.
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