diff options
| -rw-r--r-- | doc/coreutils.texi | 28 | ||||
| -rw-r--r-- | src/date.c | 6 |
2 files changed, 33 insertions, 1 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index 7b37f60e1..92331945b 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -14262,6 +14262,34 @@ input. This is useful when you have many dates to process, because the system overhead of starting up the @command{date} executable many times can be considerable. +@item -I[@var{timespec}] +@itemx --iso-8601[=@var{timespec}] +@opindex -I[@var{timespec}] +@opindex --iso-8601[=@var{timespec}] +Display the date using the @acronym{ISO} 8601 format, @samp{%Y-%m-%d}. + +The argument @var{timespec} specifies the number of additional +terms of the time to include. It can be one of the following: +@table @samp +@item auto +Print just the date. This is the default if @var{timespec} is omitted. + +@item hours +Append the hour of the day to the date. + +@item minutes +Append the hours and minutes. + +@item seconds +Append the hours, minutes and seconds. + +@item ns +Append the hours, minutes, seconds and nanoseconds. +@end table + +If showing any time terms, then include the time zone using the format +@samp{%z}. + @item -r @var{file} @itemx --reference=@var{file} @opindex -r diff --git a/src/date.c b/src/date.c index 755736ab6..288804a9b 100644 --- a/src/date.c +++ b/src/date.c @@ -87,7 +87,7 @@ static struct option const long_options[] = { {"date", required_argument, NULL, 'd'}, {"file", required_argument, NULL, 'f'}, - {"iso-8601", optional_argument, NULL, 'I'}, /* Deprecated. */ + {"iso-8601", optional_argument, NULL, 'I'}, {"reference", required_argument, NULL, 'r'}, {"rfc-822", no_argument, NULL, 'R'}, {"rfc-2822", no_argument, NULL, 'R'}, @@ -131,6 +131,10 @@ Display the current time in the given FORMAT, or set the system date.\n\ \n\ -d, --date=STRING display time described by STRING, not `now'\n\ -f, --file=DATEFILE like --date once for each line of DATEFILE\n\ + -I[TIMESPEC], --iso-8601[=TIMESPEC] output date/time in ISO 8601 format.\n\ + TIMESPEC=`date' for date only (the default),\n\ + `hours', `minutes', `seconds', or `ns' for date\n\ + and time to the indicated precision.\n\ "), stdout); fputs (_("\ -r, --reference=FILE display the last modification time of FILE\n\ |