How to resolve the algorithm File size distribution step by step in the UNIX Shell programming language
Published on 12 May 2024 09:40 PM
How to resolve the algorithm File size distribution step by step in the UNIX Shell programming language
Table of Contents
Problem Statement
Beginning from the current directory, or optionally from a directory specified as a command-line argument, determine how many files there are of various sizes in a directory hierarchy.
My suggestion is to sort by logarithmn of file size, since a few bytes here or there, or even a factor of two or three, may not be that significant. Don't forget that empty files may exist, to serve as a marker.
Is your file system predominantly devoted to a large number of smaller files, or a smaller number of huge files?
Let's start with the solution:
Step by Step solution about How to resolve the algorithm File size distribution step by step in the UNIX Shell programming language
Source code in the unix programming language
#!/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
}'
You may also check:How to resolve the algorithm User input/Graphical step by step in the Nim programming language
You may also check:How to resolve the algorithm System time step by step in the SQL PL programming language
You may also check:How to resolve the algorithm CRC-32 step by step in the Pascal programming language
You may also check:How to resolve the algorithm Horner's rule for polynomial evaluation step by step in the MATLAB programming language
You may also check:How to resolve the algorithm Forward difference step by step in the Smalltalk programming language