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Bash function to convert bytes to human readable size
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| # Copyright 2015 Andrew Gunnerson <andrewgunnerson@gmail.com> | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| # Convert bytes to human readable size | |
| # $1: Size in bytes | |
| # $2: Floating point precision (digits after dot) | |
| # Return: Nothing | |
| # Prints: Human readable size | |
| # | |
| # Example: "$(human_readable 6390759424 2)" == "5.95 GiB" | |
| human_readable() { | |
| local abbrevs=( | |
| $((1 << 60)):ZiB | |
| $((1 << 50)):EiB | |
| $((1 << 40)):TiB | |
| $((1 << 30)):GiB | |
| $((1 << 20)):MiB | |
| $((1 << 10)):KiB | |
| $((1)):bytes | |
| ) | |
| local bytes="${1}" | |
| local precision="${2}" | |
| if [[ "${bytes}" == "1" ]]; then | |
| echo "1 byte" | |
| else | |
| for item in "${abbrevs[@]}"; do | |
| local factor="${item%:*}" | |
| local abbrev="${item#*:}" | |
| if [[ "${bytes}" -ge "${factor}" ]]; then | |
| local size="$(bc -l <<< "${bytes} / ${factor}")" | |
| printf "%.*f %s\n" "${precision}" "${size}" "${abbrev}" | |
| break | |
| fi | |
| done | |
| fi | |
| } |
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