如果你确实希望传递相同的参数，请使用“$@”而不是普通的$@。

观察:

$ cat no_quotes.sh
#!/bin/bash
echo_args.sh $@

$ cat quotes.sh
#!/bin/bash
echo_args.sh "$@"

$ cat echo_args.sh
#!/bin/bash
echo Received: $1
echo Received: $2
echo Received: $3
echo Received: $4

$ ./no_quotes.sh first second
Received: first
Received: second
Received:
Received:

$ ./no_quotes.sh "one quoted arg"
Received: one
Received: quoted
Received: arg
Received:

$ ./quotes.sh first second
Received: first
Received: second
Received:
Received:

$ ./quotes.sh "one quoted arg"
Received: one quoted arg
Received:
Received:
Received:

我知道这个问题已经得到了很好的回答，但这里有一个“$@”$@“$*”和$*之间的比较

测试脚本内容:

# cat ./test.sh
#!/usr/bin/env bash
echo "================================="

echo "Quoted DOLLAR-AT"
for ARG in "$@"; do
    echo $ARG
done

echo "================================="

echo "NOT Quoted DOLLAR-AT"
for ARG in $@; do
    echo $ARG
done

echo "================================="

echo "Quoted DOLLAR-STAR"
for ARG in "$*"; do
    echo $ARG
done

echo "================================="

echo "NOT Quoted DOLLAR-STAR"
for ARG in $*; do
    echo $ARG
done

echo "================================="

现在，运行带有各种参数的测试脚本:

# ./test.sh  "arg with space one" "arg2" arg3
=================================
Quoted DOLLAR-AT
arg with space one
arg2
arg3
=================================
NOT Quoted DOLLAR-AT
arg
with
space
one
arg2
arg3
=================================
Quoted DOLLAR-STAR
arg with space one arg2 arg3
=================================
NOT Quoted DOLLAR-STAR
arg
with
space
one
arg2
arg3
=================================

#!/usr/bin/env bash
while [ "$1" != "" ]; do
  echo "Received: ${1}" && shift;
done;

只是认为在尝试测试args如何进入脚本时，这可能更有用

我的SUN Unix有很多限制，甚至“$@”也没有按预期解释。我的变通方法是${@}。例如,

#!/bin/ksh
find ./ -type f | xargs grep "${@}"

顺便说一下，我必须有这个特定的脚本，因为我的Unix也不支持grep -r

如果在带引号的字符串中包含$@和其他字符，当有多个参数时，行为是非常奇怪的，只有第一个参数包含在引号中。

例子:

#!/bin/bash
set -x
bash -c "true foo $@"

收益率:

$ bash test.sh bar baz
+ bash -c 'true foo bar' baz

但是先赋值给另一个变量:

#!/bin/bash
set -x
args="$@"
bash -c "true foo $args"

收益率:

$ bash test.sh bar baz
+ args='bar baz'
+ bash -c 'true foo bar baz'

有时你想传递所有的参数，但前面有一个标志(例如——flag)

$ bar --flag "$1" --flag "$2" --flag "$3"

你可以通过以下方式做到这一点:

$ bar $(printf -- ' --flag "%s"' "$@")

注意:为了避免额外的字段分割，您必须引用%s和$@，并且为了避免使用单个字符串，您不能引用printf的子shell。