RosettaCodeData/Task/File-size-distribution/UNIX-Shell/file-size-distribution.sh

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#!/bin/sh
set -eu
tabs -8
if [ ${GNU:-} ]
then
find -- "${1:-.}" -type f -exec du -b -- {} +
else
# Use a subshell to remove the last "total" line per each ARG_MAX
find -- "${1:-.}" -type f -exec sh -c 'wc -c -- "$@" | sed \$d' argv0 {} +
fi | awk -vOFS='\t' '
BEGIN {split("KB MB GB TB PB", u); u[0] = "B"}
{
++hist[$1 ? length($1) - 1 : -1]
total += $1
}
END {
max = -2
for (i in hist)
max = (i > max ? i : max)
print "From", "To", "Count\n"
for (i = -1; i <= max; ++i)
{
if (i in hist)
{
if (i == -1)
print "0B", "0B", hist[i]
else
print 10 ** (i % 3) u[int(i / 3)],
10 ** ((i + 1) % 3) u[int((i + 1) / 3)],
hist[i]
}
}
l = length(total) - 1
printf "\nTotal: %.1f %s in %d files\n",
total / (10 ** l), u[int(l / 3)], NR
}'