regex - How to write and match regular expressions in /bin/sh script? -


i writing shell script limited unix-based microkernel doesn't have bash! /bin/sh can't run following lines reasons.

if [[ `uname` =~ (qnx|qnx) ]]; read -p "what dev prefix use? " dev_prefix if [[ $dev_prefix =~ ^[a-z0-9_-]+@[a-z0-9_-"."]+:.*$ ]];

for 1st , 3rd lines, complains missing expression operator, , 2nd line says no coprocess! can shed light on differences between /bin/bash , /bin/sh scripts?

you can use equivalent script in /bin/sh:

if uname | grep -eq '(qnx|qnx)';    printf "what dev prefix use? "    read dev_prefix    if echo "$dev_prefix" | grep -eq '^[a-z0-9_-]+@[a-z0-9_-"."]+:';    ...    fi fi

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