Jason Glass herd-the-cats
herd-the-cats
/ gist:6db11a190f694f94f4533d2ce8efe481
Last active
September 7, 2020 23:06
Bash function creates a persistent subshell of bc to stream multiple arithmetic operations
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| # credit to https://github.com/F-Hauri/Connector-bash for the idea | |
| function bcpipe() { | |
| command -v bc 1>/dev/null 2>&1 || { printf "No bc binary.\n" 1>&2 ; return 1 ;} | |
| [[ $# -lt 1 ]] && { printf "Usage: %s [BCSTART|BCSTOP] || \033[3mbc-compatible arithmetic arguments\033[0m\n" "${FUNCNAME[0]}" ; return 1 ;} | |
| if [[ $1 == "BCSTART" ]] ; then | |
| local tmpd | |
| local tmpfifo | |
| tmpd="$(mktemp -d)" |