How can I use the output of a command in cfengine3

Question

I want to list a directory content and use the result somewhere else:

bundle agent test
{

   commands:
      "ls /tmp/test/";

    reports:
    ubuntu::
       "print output here for example";  
# or add it to a variable which is how I really want to use it.
 }

score 12 · Accepted Answer · answered Jun 29 '12 at 10:05

12

bundle agent test
{

    vars:
        "my_result" string => execresult("/bin/ls /tmp/test/","noshell");

    reports:
        ubuntu::
            "Output is : $(my_result)";  
}

See https://cfengine.com/manuals/cf3-solutions#Execresult-example

answered Jun 29 '12 at 10:05

faker

17,616
2
62
71

Beware! This command will be run several times per cf-agent run. See the docs on normal ordering and the note at the bottom of the docs for execresult(). For ls it may not be important, but for more expensive commands it certainly will be. – Wildcard Sep 15 '16 at 22:40

score 4 · Answer 2 · answered Sep 28 '12 at 13:35

4

As of version 3.3.0, you can use the lsdir() function instead.

vars:
  "result" slist => lsdir("/tmp/test", ".*", "false");

read more : https://cfengine.com/manuals/cf3-Reference#Function-lsdir

answered Sep 28 '12 at 13:35

Pledge

81
3

This is actually better for the ls use case as it makes use of CFEngine's internal function caching and doesn't call an external command multiple times per run. Of course, execresult() is more general. – Wildcard Sep 15 '16 at 22:42

How can I use the output of a command in cfengine3

2 Answers2

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