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 "$1"
#EOF
当我运行它时,我得到以下输出:
+ execute 'chmod 777 build.test-case.sh'
++ chmod 777 build.test-case.sh
+ runCommand build.test-case.sh
+ PATH=build.test-case.sh
+ execute 'chmod 777 build.test-case.sh'
++ chmod 777 build.test-case.sh
./build.test-case.sh: line 5: chmod: command not found
所以chmod
在直接调用execute
函数时有效,但在从另一个函数调用时失败,即使调试输出看起来完全相同......
任何人都可以解释这种行为吗?
答案 0 :(得分:3)
问题是你要覆盖PATH变量,该变量包含二进制文件所在目录的路径,如chmod
变量,这就是为什么它找不到它。
如果您为PATH
函数使用另一个变量而不是runCommand()
变量,它应该可以正常工作,如下所示:
function runCommand() {
VAR="${1}"
execute "chmod 777 ${VAR}"
}