这是一个纯Bash版本，不需要任何外部实用程序：
#!/bin/bashvercomp () { if [[ $1 == $2 ]] then return 0 fi local IFS=. local i ver1=($1) ver2=($2) # fill empty fields in ver1 with zeros for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)) do ver1[i]=0 done for ((i=0; i<${#ver1[@]}; i++)) do if [[ -z ${ver2[i]} ]] then # fill empty fields in ver2 with zeros ver2[i]=0 fi if ((10#${ver1[i]} > 10#${ver2[i]})) then return 1 fi if ((10#${ver1[i]} < 10#${ver2[i]})) then return 2 fi done return 0}testvercomp () { vercomp $1 $2 case $? in 0) op='=';; 1) op='>';; 2) op='<';; esac if [[ $op != $3 ]] then echo "FAIL: Expected '$3', Actual '$op', Arg1 '$1', Arg2 '$2'" else echo "Pass: '$1 $op $2'" fi}# Run tests# argument table format:# testarg1 testarg2 expected_relationshipecho "The following tests should pass"while read -r testdo testvercomp $testdone << EOF1 1 =2.1 2.2 <3.0.4.10 3.0.4.2 >4.08 4.08.01 <3.2.1.9.8144 3.2 >3.2 3.2.1.9.8144 <1.2 2.1 <2.1 1.2 >5.6.7 5.6.7 =1.01.1 1.1.1 =1.1.1 1.01.1 =1 1.0 =1.0 1 =1.0.2.0 1.0.2 =1..0 1.0 =1.0 1..0 =EOFecho "The following test should fail (test the tester)"testvercomp 1 1 '>'运行测试：
$ . ./vercompThe following tests should passPass: '1 = 1'Pass: '2.1 < 2.2'Pass: '3.0.4.10 > 3.0.4.2'Pass: '4.08 < 4.08.01'Pass: '3.2.1.9.8144 > 3.2'Pass: '3.2 < 3.2.1.9.8144'Pass: '1.2 < 2.1'Pass: '2.1 > 1.2'Pass: '5.6.7 = 5.6.7'Pass: '1.01.1 = 1.1.1'Pass: '1.1.1 = 1.01.1'Pass: '1 = 1.0'Pass: '1.0 = 1'Pass: '1.0.2.0 = 1.0.2'Pass: '1..0 = 1.0'Pass: '1.0 = 1..0'The following test should fail (test the tester)FAIL: Expected '>', Actual '=', Arg1 '1', Arg2 '1'
