Created
December 14, 2017 21:13
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bash script to convert numbers (usually bytes) to IEC or SI human readable format
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| #!/bin/bash | |
| # bytesToHuman based on https://unix.stackexchange.com/questions/44040/a-standard-tool-to-convert-a-byte-count-into-human-kib-mib-etc-like-du-ls1/259254#259254 | |
| # units from wikipedia (note I had to re-order Z and Y): | |
| # - https://en.wikipedia.org/wiki/Binary_prefix | |
| # - https://en.wikipedia.org/wiki/File_size | |
| # - https://en.wikipedia.org/wiki/ISO/IEC_80000#Information_science_and_technology | |
| # test cases from https://www.alteeve.com/w/IEC_and_SI_Size_Notations and https://en.wikipedia.org/wiki/File_size | |
| # 64-bibt checks at https://superuser.com/questions/1030122/what-is-the-maximum-value-of-a-numeric-bash-shell-variable/1030129#1030129 | |
| bytesToHumanIEC() { | |
| b=${1:-0}; d=''; s=0; S=(Bytes {K,M,G,T,E,P,Z,Y}iB) | |
| while ((b > 1024)); do | |
| d="$(printf ".%02d" $((b % 1024 * 100 / 1024)))" | |
| b=$((b / 1024)) | |
| let s++ | |
| done | |
| echo "$b$d ${S[$s]}" | |
| } | |
| bytesToHumanSI() { | |
| b=${1:-0}; d=''; s=0; S=(Bytes {k,M,G,T,E,P,Z,Y}B) | |
| while ((b > 1000)); do | |
| d="$(printf ".%02d" $((b % 1000 * 100 / 1000)))" | |
| b=$((b / 1000)) | |
| let s++ | |
| done | |
| echo "$b$d ${S[$s]}" | |
| } | |
| # test cases | |
| echo bytesToHumanIEC test cases: | |
| bytesToHumanIEC 0 | |
| bytesToHumanIEC 1023 | |
| bytesToHumanIEC 1048575 | |
| bytesToHumanIEC 1073741823 | |
| bytesToHumanIEC 1099511627775 | |
| bytesToHumanIEC 1125899906842623 | |
| bytesToHumanIEC 1152921504606846975 | |
| ## These are likekly not supported as they overflow on 64-bit systems: | |
| bytesToHumanIEC 1180591620717411303423 | |
| bytesToHumanIEC 1208925819614629174706175 | |
| bytesToHumanIEC 1 | |
| bytesToHumanIEC 1024 | |
| bytesToHumanIEC 1048576 | |
| bytesToHumanIEC 1073741824 | |
| bytesToHumanIEC 1099511627776 | |
| bytesToHumanIEC 1125899906842624 | |
| bytesToHumanIEC 1152921504606846976 | |
| bytesToHumanIEC 1180591620717411303424 | |
| bytesToHumanIEC 1208925819614629174706176 | |
| bytesToHumanIEC 2 | |
| bytesToHumanIEC 1025 | |
| bytesToHumanIEC 1048577 | |
| bytesToHumanIEC 1073741825 | |
| bytesToHumanIEC 1099511627777 | |
| bytesToHumanIEC 1125899906842625 | |
| bytesToHumanIEC 1152921504606846977 | |
| bytesToHumanIEC 1180591620717411303425 | |
| bytesToHumanIEC 1208925819614629174706177 | |
| bytesToHumanIEC 0 | |
| bytesToHumanIEC 1999 | |
| bytesToHumanIEC 1999999 | |
| bytesToHumanIEC 1999999999 | |
| bytesToHumanIEC 1999999999999 | |
| bytesToHumanIEC 1999999999999999 | |
| bytesToHumanIEC 1999999999999999999 | |
| bytesToHumanIEC 1999999999999999999999 | |
| bytesToHumanIEC 1999999999999999999999999 | |
| bytesToHumanIEC 1 | |
| bytesToHumanIEC 1000 | |
| bytesToHumanIEC 1000000 | |
| bytesToHumanIEC 1000000000 | |
| bytesToHumanIEC 1000000000000 | |
| bytesToHumanIEC 1000000000000000 | |
| bytesToHumanIEC 1000000000000000000 | |
| ## These are likekly not supported as they overflow on 64-bit systems: | |
| bytesToHumanIEC 1000000000000000000000 | |
| bytesToHumanIEC 1000000000000000000000000 | |
| bytesToHumanIEC 1 | |
| bytesToHumanIEC 1001 | |
| bytesToHumanIEC 1000001 | |
| bytesToHumanIEC 1000000001 | |
| bytesToHumanIEC 1000000000001 | |
| bytesToHumanIEC 1000000000000001 | |
| bytesToHumanIEC 1000000000000000001 | |
| bytesToHumanIEC 1000000000000000000001 | |
| bytesToHumanIEC 1000000000000000000000001 | |
| echo bytesToHumanSI test cases: | |
| bytesToHumanSI 1 | |
| bytesToHumanSI 1024 | |
| bytesToHumanSI 1048576 | |
| bytesToHumanSI 1073741824 | |
| bytesToHumanSI 1099511627776 | |
| bytesToHumanSI 1125899906842624 | |
| bytesToHumanSI 1152921504606846976 | |
| bytesToHumanSI 1180591620717411303424 | |
| bytesToHumanSI 1208925819614629174706176 | |
| bytesToHumanSI 1 | |
| bytesToHumanSI 1000 | |
| bytesToHumanSI 1000000 | |
| bytesToHumanSI 1000000000 | |
| bytesToHumanSI 1000000000000 | |
| bytesToHumanSI 1000000000000000 | |
| bytesToHumanSI 1000000000000000000 | |
| bytesToHumanSI 1000000000000000000000 | |
| bytesToHumanSI 1000000000000000000000000 | |
| bytesToHumanSI 0 | |
| bytesToHumanSI 1023 | |
| bytesToHumanSI 1048575 | |
| bytesToHumanSI 1073741823 | |
| bytesToHumanSI 1099511627775 | |
| bytesToHumanSI 1125899906842623 | |
| bytesToHumanSI 1152921504606846975 | |
| bytesToHumanSI 1180591620717411303423 | |
| bytesToHumanSI 1208925819614629174706175 | |
| bytesToHumanSI 1 | |
| bytesToHumanSI 1024 | |
| bytesToHumanSI 1048576 | |
| bytesToHumanSI 1073741824 | |
| bytesToHumanSI 1099511627776 | |
| bytesToHumanSI 1125899906842624 | |
| bytesToHumanSI 1152921504606846976 | |
| bytesToHumanSI 1180591620717411303424 | |
| bytesToHumanSI 1208925819614629174706176 | |
| bytesToHumanSI 2 | |
| bytesToHumanSI 1025 | |
| bytesToHumanSI 1048577 | |
| bytesToHumanSI 1073741825 | |
| bytesToHumanSI 1099511627777 | |
| bytesToHumanSI 1125899906842625 | |
| bytesToHumanSI 1152921504606846977 | |
| bytesToHumanSI 1180591620717411303425 | |
| bytesToHumanSI 1208925819614629174706177 | |
| bytesToHumanSI 0 | |
| bytesToHumanSI 1999 | |
| bytesToHumanSI 1999999 | |
| bytesToHumanSI 1999999999 | |
| bytesToHumanSI 1999999999999 | |
| bytesToHumanSI 1999999999999999 | |
| bytesToHumanSI 1999999999999999999 | |
| bytesToHumanSI 1999999999999999999999 | |
| bytesToHumanSI 1999999999999999999999999 | |
| bytesToHumanSI 1 | |
| bytesToHumanSI 1000 | |
| bytesToHumanSI 1000000 | |
| bytesToHumanSI 1000000000 | |
| bytesToHumanSI 1000000000000 | |
| bytesToHumanSI 1000000000000000 | |
| bytesToHumanSI 1000000000000000000 | |
| bytesToHumanSI 1000000000000000000000 | |
| bytesToHumanSI 1000000000000000000000000 | |
| bytesToHumanSI 1 | |
| bytesToHumanSI 1001 | |
| bytesToHumanSI 1000001 | |
| bytesToHumanSI 1000000001 | |
| bytesToHumanSI 1000000000001 | |
| bytesToHumanSI 1000000000000001 | |
| bytesToHumanSI 1000000000000000001 | |
| bytesToHumanSI 1000000000000000000001 | |
| bytesToHumanSI 1000000000000000000000001 | |
You have inverted exa and peta: E,P should be P,E
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1073758208is now shown as MiB but looks better as GiB (is more consistent withbtrfstoo, see nachoparker/btrfs-du#6 )