KSH：遍历双引号逗号分隔变量

Question

使用 KSH。我有一个变量，其中包含用双引号括起来并用逗号分隔的字符串，我想遍历这些字符串，我不想将双引号中的逗号识别为分隔符。

我已经尝试将 IFS 设置为 IFS="\",\"" 和 IFS="," 但它仍然可以识别双引号内的逗号。

简化版：

errorStrings="Some error","Another error","This, error"
oldIFS=$IFS
IFS=","
for error in $errorStrings;do
  echo "Checking for $error"
  #grep "$error" file >/dev/null 2>&1 && echo "$error found"
  continue
done
IFS=$oldIFS


Actual:
Checking for Some error
Checking for Another error
Checking for This
Checking for  error

Expected:
Checking for Some error
Checking for Another error
Checking for This, error

Answer 1

第一个问题是 errorStrings 不是您所期望的。尝试

echo "e=[${errorStrings}]"

如果您希望在字符串中使用双引号，请使用

errorStrings='"Some error","Another error","This, error"'

当您在 for 循环中引用 $errorStrings 时，您的脚本将运行得更好。

oldIFS=$IFS
IFS=","
for error in "$errorStrings";do
  echo "Checking for $error"
  #grep "$error" file >/dev/null 2>&1 && echo "$error found"
  continue
done
IFS=$oldIFS

这个循环仍然需要修改以删除引号。也许这是使用数组的好时机：

errorStrings=("Some error" "Another error" "This, error")
for error in "${errorStrings[@]}";do
  echo "Checking for $error"
  #grep "$error" file >/dev/null 2>&1 && echo "$error found"
  continue
done

我不确定您的环境中有哪些选项，也许这也行得通：

errorStrings='"Some error","Another error","This, error"'

echo "${errorStrings}" | sed 's/","/"\n"/g' | while read error; do
   echo "Checking for $error"
done

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