假设我在bash脚本中编写了一个函数,其中包含可用二进制文件的名称,比如pwd：
function pwd(){
echo '/'
}
好吧,这看起来有点奇怪,但问题是：如果在我的脚本中进一步编写命令会发生什么：
cd /usr pwd
将使用什么密码？另外,我如何强制使用另一个呢？
解决方法
您的函数将被调用,因为它隐藏了内置的pwd.
要强制执行命令,请使用内置命令：
command pwd
从bash手册：
command [-pVv] command [arg ...]
Run command with args suppressing the normal shell function
lookup. Only builtin commands or commands found in the PATH are
executed. If the -p option is given,the search for command is
performed using a default value for PATH that is guaranteed to
find all of the standard utilities. If either the -V or -v
option is supplied,a description of command is printed. The -v
option causes a single word indicating the command or file name
used to invoke command to be displayed; the -V option produces a
more verbose description. If the -V or -v option is supplied,the exit status is 0 if command was found,and 1 if not. If
neither option is supplied and an error occurred or command can-
not be found,the exit status is 127. Otherwise,the exit sta-
tus of the command builtin is the exit status of command.
