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linux - "cp -r"在 bash 中表现异常吗?

转载 作者:太空宇宙 更新时间:2023-11-04 11:30:12 25 4
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我正在编写一个 bash 脚本来使用 puppet 客户端引导云服务器,以便我可以创建一个启动镜像,但是我从一个简单的“cp -r”中得到了奇怪的行为,其中我的源代码的内容正在复制目录,但未复制父目录。例如,如果我有/root/puppet/file1,并且我在我的 bash 脚本中发出了 cp -r/root/puppet/opt 命令,而不是获取/opt/puppet/file1,我正在获取/opt/file1。但是,如果我在脚本执行之前回显该命令,然后复制该回显的输出并在命令行上运行它,那么我会按预期获得/opt/puppet/file1。

这是我的目录结构。

mydirectory
- script.sh
- assets
- puppet
- file1
- file2
- file3

这是我脚本中的片段

#!/bin/bash

### VARIABLE INITIALIZATION
BOOTSTRAP_DIR="/opt/bootstrapping"

# Die with an error message
die()
{
echo "**** BOOTSTRAPPING FAILED ****"
echo -e "ERROR: ${2}"
exit ${1}
}

# check the return code of the previous command and die if != 0
check_errs()
{
if [ "${1}" -ne "0" ]; then
die ${1} "${2}"
fi
}

# Get the path of the directory from which this script is being executed
SCRIPT_PATH="`dirname \"$0\"`" # relative
check_errs $? "Could not get the relative path of the executing script"
SCRIPT_PATH="`( cd \"$SCRIPT_PATH\" && pwd )`" # absolutized and normalized
check_errs $? "Could not get the absolute path of the executing script"

### DEPLOY THE BOOTSTRAPPING FILES
if [ -d "${BOOTSTRAP_DIR}" ]; then
echo "Removing ${BOOTSTRAP_DIR}"
rm -rf ${BOOTSTRAP_DIR}
check_errs $? "Could not remove ${BOOTSTRAP_DIR}"
fi

if [ ! -d "${SCRIPT_PATH}/assets/puppet" ]; then
die 1 "Can not find ${SCRIPT_PATH}/assets/puppet"
fi

if [ ! -f "${SCRIPT_PATH}/assets/rc.local" ]; then
die 1 "Can not find ${SCRIPT_PATH}/assets/rc.local"
fi

# This command succeeds, but /opt/bootstrapping/puppet does not exist afterwards.
# Instead I get /opt/bootstrapping/files...
echo "Copying ${SCRIPT_PATH}/assets/puppet to ${BOOTSTRAP_DIR}"
cp -r ${SCRIPT_PATH}/assets/puppet ${BOOTSTRAP_DIR}
check_errs $? "Could not copy ${SCRIPT_PATH}/assets/puppet to ${BOOTSTRAP_DIR}"

echo "Copying ${SCRIPT_PATH}/assets/rc.local to /etc/rc.local"
cp ${SCRIPT_PATH}/assets/rc.local /etc/rc.local
check_errs $? "Could not copy ${SCRIPT_PATH}/assets/rc.local to /etc/rc.local"

谁能解释为什么只复制我的源目录的内容?我觉得这很愚蠢,因为我累了所以我没有看到。

编辑

这绝对是我愚蠢的案例。当脚本调用 cp -r/root/assets/puppet/opt/bootstrapping 时,/opt/bootstrapping 不存在,因此 cp 创建/opt/bootstrapping,并将源文件放入新目录.我不认为这个问题对 future 的任何人都有多大值(value)。除非有人反对,否则我想将其删除。

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