diff options
Diffstat (limited to 'zic/zdump.8')
| -rw-r--r-- | zic/zdump.8 | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/zic/zdump.8 b/zic/zdump.8 index dff68c2d8d88..67cbaead4b55 100644 --- a/zic/zdump.8 +++ b/zic/zdump.8 @@ -10,7 +10,7 @@ zdump \- time zone dumper .B \-v ] [ .B \-c -cutoffyear ] [ zonename ... ] +[loyear,]hiyear ] [ zonename ... ] .SH DESCRIPTION .I Zdump prints the current time in each @@ -38,8 +38,20 @@ if the given time is Daylight Saving Time or .B isdst=0 otherwise. .TP -.BI "\-c " cutoffyear -Cut off the verbose output near the start of the given year. +.BI "\-c " [loyear,]hiyear +Cut off verbose output near the start of the given year(s). +By default, +the program cuts off verbose output near the starts of the years -500 and 2500. +.SH LIMITATIONS +The +.B \-v +option may not be used on systems with floating-point time_t values +that are neither float nor double. +.PP +Time discontinuities are found by sampling the results returned by localtime +at twelve-hour intervals. +This works in all real-world cases; +one can construct artificial time zones for which this fails. .SH "SEE ALSO" newctime(3), tzfile(5), zic(8) -.\" @(#)zdump.8 7.4 +.\" @(#)zdump.8 8.1 |