如何借助 if 条件检查设置的变量是否已分配有文件

Question

#!/bin/csh -fx

set my_path = "/cd/home/dir"
cd $my_path
set path1 = `ls -1 | grep "abc" | head -1`
set path2 = `ls -1 | grep "def" | head -1`

1)#如何检查path1是否有分配给它的目录

if(-d $path1)then #this checks if the variable is defined but I want to check if it has a dir assigned?
 #some function
else
endif

 
if(-d $path2)then
#execute
else
endif

就我而言path1，并不是path2每次都创建，或者path1或path2将被创建，当我运行它时，我得到如下所述。例如：- 未创建路径2 if: Missing file name.

如果未创建或缺少文件名，则应转到 endif。请帮忙