2

我有以下 bash 脚本(这是更复杂脚本的简化版本)。

#!/usr/bin/env bash
set -x

function execute() {
    `$1` # same as $($1), gives "command not found" as do all the following:
    # $1 # or ${1}
    # eval "$1"
    # eval $1

    # This gives "No such file or directory" even though it *is* there...
    #"$1"
}

function runCommand() {
    PATH="${1}"
    execute "chmod 777 ${PATH}"
}

execute "chmod 777 ${1}"
runCommand "$1"

#EOF

当我运行它时,我得到以下输出:

+ execute 'chmod 777 build.test-case.sh'
++ chmod 777 build.test-case.sh
+ runCommand build.test-case.sh
+ PATH=build.test-case.sh
+ execute 'chmod 777 build.test-case.sh'
++ chmod 777 build.test-case.sh
./build.test-case.sh: line 5: chmod: command not found

因此chmod,当execute直接调用该函数时有效,但从另一个函数调用它时失败,即使调试输出似乎完全相同......

谁能解释这种行为?

4

1 回答 1

3

问题是您正在覆盖PATH变量,该变量包含二进制文件所在目录的路径,就像那个一样chmod,所以这就是它找不到它的原因。

PATH如果您为您的runCommand()函数使用另一个变量而不是一个变量,它应该可以工作,如下所示:

function runCommand() {
    VAR="${1}"
    execute "chmod 777 ${VAR}"
}
于 2012-10-02T10:03:54.257 回答