用于读取每行中具有不同字段数的输入文件的awk脚本

输入文件在每行中有不同数量的字段

有没有办法用awk获得预期的输出

---

awk-F'，''{print“echo”$1；for（i=2；i只需将echo语句放入for循环中即可

$ awk -F',' '{for (i = 2; i <= NF; i++) print "echo "$1  " command1 "$i " command2"}' test.txt
echo "abc" command1 4 command2
echo "abc" command1 21 command2
echo "abc" command1 22 command2
echo "abc" command1 25 command2
echo "standard" command1 1  command2
echo "test" command1 4 command2
echo "test" command1 5 command2
echo "test" command1 10 command2
echo "test" command1 11 command2
echo "test" command1 12 command2

$

$awk-F'，''{对于（i=2；i请尝试以下方法：

awk -F, '{for (i=2;i<=NF;i++) print "echo", $1, "command1", $i, "command2"}'

另一种noloop
awk
方法类似于但简洁：

awk -F, '{gsub(/,/,"\necho " $1 " command1 ");sub(/[^\n]*\n/,"");gsub(/\n|$/," command2\n");printf $0}' file

这里没有使用循环的不同方法

awk -F, '
/^\"/ && prev{
  print prev
  prev=""
}
{
  gsub(/,/,"\necho "  $1  " command1 ")
}
{
  gsub(/$/," command2")
  prev=$0
  sub(/.*\"\n/,"",prev)
  gsub(/\n/," command2\n",prev)
}
END{
  if(prev){
    print prev
  }
}'   Input_file

输出如下

echo "abc" command1 4 command2
echo "abc" command1 21 command2
echo "abc" command1 22 command2
echo "abc" command1 25 command2
echo "standard" command1 1  command2
echo "test" command1 4 command2
echo "test" command1 5 command2
echo "test" command1 10 command2
echo "test" command1 11 command2
echo "test" command1 12 command2

您的输入是CSV，因此-第一个字段是否可以包含逗号，例如
“hello，world”，3,7,21
？转义引号如何，例如
“hello，\“world\”，3,7,21
或
“hello”，“world”“，3,7,21
？换行如何？
$ cat file
"abc",4,21,22,25
"standard",1
"test",4,5,10,11,12

$ awk -F, '{for (i=2;i<=NF;i++) print "echo", $1, "command1", $i, "command2"}' file
echo "abc" command1 4 command2
echo "abc" command1 21 command2
echo "abc" command1 22 command2
echo "abc" command1 25 command2
echo "standard" command1 1  command2
echo "test" command1 4 command2
echo "test" command1 5 command2
echo "test" command1 10 command2
echo "test" command1 11 command2
echo "test" command1 12 command2

sed -r '/,/!d;/,/{s/([^,]*),([^,]*)/"echo" \1 "command1" \2 "command2"\n\1/; P; D;}'

awk -F, '{gsub(/,/,"\necho " $1 " command1 ");sub(/[^\n]*\n/,"");gsub(/\n|$/," command2\n");printf $0}' file

awk -F, '
/^\"/ && prev{
  print prev
  prev=""
}
{
  gsub(/,/,"\necho "  $1  " command1 ")
}
{
  gsub(/$/," command2")
  prev=$0
  sub(/.*\"\n/,"",prev)
  gsub(/\n/," command2\n",prev)
}
END{
  if(prev){
    print prev
  }
}'   Input_file

echo "abc" command1 4 command2
echo "abc" command1 21 command2
echo "abc" command1 22 command2
echo "abc" command1 25 command2
echo "standard" command1 1  command2
echo "test" command1 4 command2
echo "test" command1 5 command2
echo "test" command1 10 command2
echo "test" command1 11 command2
echo "test" command1 12 command2