/usr/share/awk/readable.awk is in gawk 1:3.1.8+dfsg-0.1ubuntu1.
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 | # readable.awk --- library file to skip over unreadable files
#
# Arnold Robbins, arnold@skeeve.com, Public Domain
# October 2000
BEGIN {
for (i = 1; i < ARGC; i++) {
if (ARGV[i] ~ /^[A-Za-z_][A-Za-z0-9_]*=.*/ \
|| ARGV[i] == "-")
continue # assignment or standard input
else if ((getline junk < ARGV[i]) < 0) # unreadable
delete ARGV[i]
else
close(ARGV[i])
}
}
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