/usr/share/awk/rewind.awk is in gawk 1:4.0.1+dfsg-2.1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | # rewind.awk --- rewind the current file and start over
#
# Arnold Robbins, arnold@skeeve.com, Public Domain
# September 2000
function rewind( i)
{
# shift remaining arguments up
for (i = ARGC; i > ARGIND; i--)
ARGV[i] = ARGV[i-1]
# make sure gawk knows to keep going
ARGC++
# make current file next to get done
ARGV[ARGIND+1] = FILENAME
# do it
nextfile
}
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