if 条件变量逻辑运算符

if condition with variable logical operator

让我问一下,因为我已经尝试了几天,我不知道我的想法是否可行。

我在文件 1 中有以下文本:

aaa common-criteria policy POLICY1

  min-length 8 

  max-length 16

  numeric-count 1

  upper-case 3

  lower-case 2

  char-changes 4

!

和文件 2 中的以下文本:

aaa common-criteria policy POLICY2

  min-length 1

  max-length 127 

  char-changes 4

!

并且我想根据我的策略中的阈值检查两个文件中的所有值是否正确。 所以我创建了两个带有阈值的数组,以便将每个值与每个文件中的值进行比较

declare -a COM=("min-length" "max-length" "upper-case" "lower-case" "numeric-count")
declare -a OPE=("-ge" "-le" "-ge" "-ge" "-ge")
declare -a VAL=("8" "16" "1" "1" "1")

并且我创建了循环来检查文件中的每个值与 VAL(i)

中的值
for ((i=0; i<${#COM[@]}; i++)); do
    THRESHOLD=$(grep ${COM[$i]} FILE | awk -F " " '{print }') --> to get value VAL(i) for each comand COM(i)

if [[ $THRESHOLD -ge "${VAL[$i]}" ]]; then echo "OK"; else echo "KO"; fi

done

下一步应该是在 if 条件下将“-ge”更改为 OPE(i),以允许以正确的方式分析每个命令,因为“max-length”值应小于阈值。 如果我将“-ge”更改为 ${OPE[$i]} 如果 [[ "$THRESHOLD" "${OPE[$i]}" "${VAL[$i]}" ]] 该过程失败“条件二元运算符在 `${OPE[$i]}'

附近出现预期的语法错误

你知道“if”条件是否有这种灵活的句法吗? 谢谢!

[[ ... ]] 在变量展开之前以一种特殊的方式解析,因此这是不可能的(这也是为什么你不需要总是双引号 [[ ... ]] 中的变量)。但是您可以使用遵循正常解析规则的旧 [ ... ]

op==
[ x "$op" x ]  # ok

可以将 test command 与作为变量传递的参数一起使用:

test 命令示例:

v1=1; op=" -eq "; v2=1
if test "$v1 $op $v2"; then echo true; else echo false; fi
true

v1=1; op=" -eq "; v2=0
if test "$v1 $op $v2"; then echo true; else echo false; fi
false

建议在 gawk 脚本中使用关联数组,这是 Linux 机器中的标准 awk

script.awk

function boolExprTest(expr) { # function to test bool exression provided as input string
  split(expr, exprToken); # split input string into tokens
  # return boolean expression result for each 2nd token
  if (exprToken[2] == ">=") return exprToken[1] >= exprToken[3];
  if (exprToken[2] == "<=") return exprToken[1] <= exprToken[3];
  if (exprToken[2] == ">")  return exprToken[1] > exprToken[3];
  if (exprToken[2] == "<")  return exprToken[1] <  exprToken[3];
  if (exprToken[2] == "==")  return exprToken[1] ==  exprToken[3];
}

BEGINFILE { # at the beging of each input file read
  # define boolean expression templates using associative arry boolExpr[]
  boolExpr["min-length"] = " >= 8";
  boolExpr["max-length"] = " <= 16";
  boolExpr["upper-case"] = " >= 1";
  boolExpr["lower-case"] = " >= 1";
  boolExpr["numeric-count"] = " >= 1";
  # define current file's results using associative arry currResults[]
  currResults["min-length"] = "undefined";
  currResults["max-length"] = "undefined";
  currResults["upper-case"] = "undefined";
  currResults["lower-case"] = "undefined";
  currResults["numeric-count"] = "undefined";
  # print file seperator
  print "---------------+---------------+-------------";
}

# for each line in current file 
 in boolExpr { # if 1st field is a member in boolExpr[]
  currResults[] = "fail"; # default result is fail in currResults[]
  if (boolExprTest( boolExpr[])) { # used function boolExprTest () to test " boolExpr[]"
    currResults[] = "pass"; # set pass result in currResults[]
  }
}

ENDFILE { # at the end of each input file read
  for (argument in currResults) { # iterate results
    #fromat print the results
    printf("%-15s|%-15s|%s\n", FILENAME, argument, currResults[argument]);
  }
}

输出:

$ awk -f script.awk input.*.txt
---------------+---------------+-------------
input.1.txt    |numeric-count  |pass
input.1.txt    |max-length     |pass
input.1.txt    |lower-case     |pass
input.1.txt    |min-length     |pass
input.1.txt    |upper-case     |pass
---------------+---------------+-------------
input.2.txt    |numeric-count  |undefined
input.2.txt    |max-length     |fail
input.2.txt    |lower-case     |undefined
input.2.txt    |min-length     |fail
input.2.txt    |upper-case     |undefined