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linux/.config/bash/module/checksum.sh

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Bash

# Save file checksums.
# Usage: checksum_create [FILES]
checksum_create() {
local IFS=$'\n'
local targets=("${@}")
local count=0
local total=${#}
local failed=0
# All files by default.
if [[ "${targets}" = "" ]]; then
targets=($(ls --classify | grep -v /\$))
total=${#targets[@]}
fi
# Iterate each file.
for target in "${targets[@]}"; do
local hashfile=".${target#./}.sha1"
# Increment count.
((count++))
# Status info.
local status="[${count}/${total}] ${target}"
echo -e "${status}"
# Skip if hash exists.
[[ -f "${hashfile}" ]] && continue
# Calculate hash.
pv "${target}" | sha1sum > ${hashfile}
# Report success.
if [[ ${?} != 0 ]]; then
echo -e "${color_bred}${status}: Failed.${color_default}"
((failed++))
fi
done
if [[ ${failed} != 0 ]]; then
echo -e "${color_bred}Failed: ${failed}.${color_default}"
return 1
fi
[[ ${total} = 0 ]] && return 1
}
# Check stored values against actual files.
checksum_check() {
local IFS=$'\n'
local targets=("${@}")
local count=0
local total=${#}
local failed=0
local skipped=0
# All files by default.
if [[ "${targets}" = "" ]]; then
targets=($(ls --classify | grep -v /\$))
total=${#targets[@]}
fi
# Iterate each file.
for target in "${targets[@]}"; do
local hashfile=".${target#./}.sha1"
# Increment count.
((count++))
# Status info.
local status="[${count}/${total}] ${target}"
echo -e "${status}"
# Skip if hash doesn't exist.
[[ -f "${hashfile}" ]] || { ((skipped++)); continue; }
# Calculate hash.
local stored=$(cat "${hashfile}" | cut -d\ -f1)
local actual=$(pv "${target}" | sha1sum | cut -d\ -f1)
if [[ "${stored}" != "${actual}" ]]; then
echo -e "${color_bred}${status}: Failed.${color_default}"
((failed++))
fi
done
if [[ ${skipped} != 0 ]]; then
echo -e "${color_byellow}Skipped: ${skipped}.${color_default}"
return 1
fi
if [[ ${failed} != 0 ]]; then
echo -e "${color_bred}Failed: ${failed}.${color_default}"
return 1
fi
}
checksum() {
find -type f | parallel -j $(_core_count) -- sha1sum {} >> checksum.sha1
}
_checksum_create() {
local path="${1%/*}"
local name="${1##*/}"
sha1sum "${path}/${name}" > "${path}/.${name}.sha1"
}
_checksum_check() {
local file="${1##*\ \ }"
local stored="${1%%\ \ *}"
# Skip if no file.
[[ -f "${file}" ]] || return 0
# Check file hash.
local actual=$(sha1sum "${file}")
actual="${actual%%\ \ *}"
# Compare values.
if [[ "${stored}" != "${actual}" ]]; then
echo -e "${color_bred}${file}: Failed.${color_default}"
return 1
fi
return 0
}
export -f checksum_create checksum_check
export -f _checksum_check _checksum_create