shell test regex
In other shells you can use grep. If your shell is POSIX compliant, do (echo "$date" | grep -Eq ^regex$) && echo "matched" || echo "did not ..., There is a confusion between regexes and the simpler "glob"/"wildcard"/"normal" patterns – whatever you want to call them. You're using the ..., The [[ ... ]] are a bash-ism. You can make your test shell-agnostic by just using grep with a normal if : if echo "$string" | grep -q "My"; then echo ..., ! negates the test, turning it into a "does not match" operator, and a [^...] regex character class means ...,First, grep "^/*$" will only match paths containing only slashes, like "/", "///", "////". You can use grep "^/" to match paths starting with a slash. If you want to use bash ... ,Note that your regex is checking whether the variable $line ends with $PWD . To check if $PWD matches anywhere in $line , remove the $ : $ line="I'm in ... ,You can use expr command to evaluate regular expression in a POSIX shell: s='Abc' expr $s : '^[[:alpha:]]-+' 3. expr returns # of matched characters which is 3 in ... , POSIX shell doesn't have a regular expression operator (or rather, the POSIX test command does not). Instead, you use the expr command to ...
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 shell test regex 相關參考資料
Check if a string matches a regex in Bash script - Stack Overflow
In other shells you can use grep. If your shell is POSIX compliant, do (echo "$date" | grep -Eq ^regex$) && echo "matched" || echo "did not ... https://stackoverflow.com How to check if a file name matches regex in shell script ...
There is a confusion between regexes and the simpler "glob"/"wildcard"/"normal" patterns – whatever you want to call them. You're using the ... https://stackoverflow.com How to test if string matches a regex in POSIX shell? (not bash ...
The [[ ... ]] are a bash-ism. You can make your test shell-agnostic by just using grep with a normal if : if echo "$string" | grep -q "My"; then echo ... https://stackoverflow.com Regex matching in a Bash if statement - Stack Overflow
! negates the test, turning it into a "does not match" operator, and a [^...] regex character class means ... https://stackoverflow.com shell test operator regular expressions - Stack Overflow
First, grep "^/*$" will only match paths containing only slashes, like "/", "///", "////". You can use grep "^/" to match paths starting with a slash.... https://stackoverflow.com Shell test to find a pattern in a string - Unix & Linux Stack ...
Note that your regex is checking whether the variable $line ends with $PWD . To check if $PWD matches anywhere in $line , remove the $ : $ line="I'm in ... https://unix.stackexchange.com test for regex in string with a posix shell - Stack Overflow
You can use expr command to evaluate regular expression in a POSIX shell: s='Abc' expr $s : '^[[:alpha:]]-+' 3. expr returns # of matched characters which is 3 in ... https://stackoverflow.com What is the regex matching operator in bourne shell script ...
POSIX shell doesn't have a regular expression operator (or rather, the POSIX test command does not). Instead, you use the expr command to ... https://stackoverflow.com |