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support for generating decreasing dates in bash 4.0 and 4.1

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The printf builtin "%(fmt)T" specifier (which allows time values
to use strftime-like formatting) is introduced in bash 4.2.

Trying to execute this in pre-4.2 bash will fail -- and if this
happens execute the fallback piece of perl code to do the same thing.
This commit is contained in:
Tomi Ollila 2014-02-10 23:15:00 +02:00 committed by David Bremner
parent d8ba7bee7d
commit e79d2fc993
1 changed files with 6 additions and 2 deletions
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8
test/test-lib.sh
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@ -374,8 +374,12 @@ generate_message ()
# we use decreasing timestamps here for historical reasons;
# the existing test suite when we converted to unique timestamps just
# happened to have signicantly fewer failures with that choice.
template[date]=$(TZ=UTC printf "%(%a, %d %b %Y %T %z)T\n" \
$((978709437 - gen_msg_cnt)))
local date_secs=$((978709437 - gen_msg_cnt))
# printf %(..)T is bash 4.2+ feature. use perl fallback if needed...
TZ=UTC printf -v template[date] "%(%a, %d %b %Y %T %z)T" $date_secs 2>/dev/null ||
template[date]=`perl -le 'use POSIX "strftime";
@time = gmtime '"$date_secs"';
print strftime "%a, %d %b %Y %T +0000", @time'`
fi
additional_headers=""