如何从csh脚本中查找某个命令是否可用？ [英] How to find from within a csh script whether a certain command is available?

问题描述

在csh脚本中，仅当有特定命令可用时，我才需要执行某些操作。我想做类似的事情

In a csh script, I need to perform something only if a certain command is available. I wanted to do something like

if( _WHAT_TO_PUT_HERE_ ) then   # enter only if command "cmd" is in the path
   cmd ...
endif

如何在csh或tcsh中执行此操作？

how to do that in csh or tcsh?

推荐答案

我想使用where命令可以解决您的问题

I guess using the where command will solve your issue

检查此：

~/animesh >where grep
/bin/grep
/tools/cfr/bin/grep
~/animesh >where egrep
/bin/egrep
/tools/cfr/bin/egrep
~/animesh >where xgrep
~/animesh >

所以可以说您正在尝试查找名为my_cmd
的命令，请尝试以下代码：

so lets say you are trying to find a command named my_cmd try the following code:

if(`where my_cmd` != "") then
   my_cmd
endif

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