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Re: extension of file-test primitives?

From: dethrophes
Subject: Re: extension of file-test primitives?
Date: Wed, 23 Aug 2017 17:54:03 +0200
User-agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

Ok I inferred incorrectly that bash was also depricating it.

And just because I was curious.

I added the other syntaxes I'm aware of to see how they compared.
looks like [[ -e file && -x file ]], is the quickest.

        test -f "${1}" -a -x "${1}"

        test -f "${1}" && test -x "${1}"

        [  -f  "${1}" -a  -x  "${1}" ]

        [[ -f "${1}" && -x "${1}" ]]

        [ -f "${1}" ] && [ -x "${1}" ]

        [[ -f "${1}" ]] && [[ -x "${1}" ]]
        local cnt=${1:?Missing repeat count}
        local test_func=${2}
        local test_file=${3}

        echo "${test_func}" "${test_file}"
        time {
        while [ $(((cnt -= 1 ) )) != 0 ]; do
      "${test_func}" "${test_file}"
    : ${TMPDIR:=/tmp}
        touch "${TMPDIR}/file"
        touch "${TMPDIR}/exec_file"
        chmod a+x "${TMPDIR}/exec_file"
        for cFile in "${TMPDIR}/file" "${TMPDIR}/exec_file" ; do
            for cTest in test_file_{1,2,3,4,5,6} ; do
                time=$(test_case 10000 "${cTest}" "${cFile}" 2>&1)
                echo ${time}

./test_bash.sh setup_test
test_file_1 /tmp/file real 0m0.144s user 0m0.132s sys 0m0.008s
test_file_2 /tmp/file real 0m0.146s user 0m0.136s sys 0m0.008s
test_file_3 /tmp/file real 0m0.142s user 0m0.136s sys 0m0.004s
test_file_4 /tmp/file real 0m0.138s user 0m0.120s sys 0m0.016s
test_file_5 /tmp/file real 0m0.172s user 0m0.160s sys 0m0.008s
test_file_6 /tmp/file real 0m0.123s user 0m0.100s sys 0m0.020s
test_file_1 /tmp/exec_file real 0m0.138s user 0m0.116s sys 0m0.020s
test_file_2 /tmp/exec_file real 0m0.151s user 0m0.140s sys 0m0.008s
test_file_3 /tmp/exec_file real 0m0.142s user 0m0.140s sys 0m0.000s
test_file_4 /tmp/exec_file real 0m0.118s user 0m0.112s sys 0m0.004s
test_file_5 /tmp/exec_file real 0m0.162s user 0m0.148s sys 0m0.012s
test_file_6 /tmp/exec_file real 0m0.142s user 0m0.132s sys 0m0.004s

Am 23.08.2017 um 17:17 schrieb Chet Ramey:
On 8/23/17 11:13 AM, dethrophes wrote:
Yhea I just learned that now, it's been at least a decade since I looked at
the posix spec on test.

Should probably update the bash help to reflect that

as help bash (in my version at least) only says

       EXPR1 -a EXPR2 True if both expr1 AND expr2 are true.
       EXPR1 -o EXPR2 True if either expr1 OR expr2 is true.
Why update the help documentation? Bash supports it. It's just deprecated
in the posix standard.

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