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Full Discussion: Syntax when using the 'exec' command
Top Forums UNIX for Advanced & Expert Users Syntax when using the 'exec' command Post 302985374 by hungryd on Tuesday 8th of November 2016 03:12:21 PM
Old 11-08-2016
Power Syntax when using the 'exec' command
Hey gang,

I'm confused about the 'exec' command. I get the basics. I can redirect stdout and stderr to one log file with:

Code:
exec >> $logFile 2>&1

However, that code requires admin rights. In other scripts, when faced with this, I'll call 'sudo' and then pass a hashed password like this:

Code:
sudo -S touch $logFile <<< "${password}"

While the above code works great to run a command with admin rights, it doesn't work with the 'exec' command:

Code:
sudo -S exec >> $logFile 2>&1 <<< "${password}"

I'm guessing that either:
  1. my syntax is wrong or
  2. I can't use sudo in a redirect

With no assistance from the man page, I could use some help from the hive mind here. Thoughts?
Last edited by rbatte1; 11-10-2016 at 05:32 AM.. Reason: Converted to formatted number-list
 

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LEARN ABOUT DEBIAN

knife-exec

KNIFE-EXEC(1)							    Chef Manual 						     KNIFE-EXEC(1)

NAME

       knife-exec - Run user scripts using the Chef API DSL

SYNOPSIS

       knife exec (options)

       -E, --exec CODE
	      Provide a snippet of code to evaluate on the command line

DESCRIPTION

       knife exec runs arbitrary ruby scripts in a context similar to that of the shef(1) DSL. See the shef documentation for a description of the
       commands available.

EXAMPLES

       Make an API call against an arbitrary endpoint
	      knife exec -E 'api.get("nodes/fluke.localdomain/cookbooks")'
	      => list of cookbooks for the node fluke.localdomain

       Remove the role obsolete from all nodes
	      knife exec -E 'nodes.transform(:all){|n| n.run_list.delete("role[obsolete]")}'

       Generate the expanded run list for hosts in the webserver role
	      knife exec -E 'nodes.find(:roles => "webserver") {|n| n.expand!; n[:recipes]}'

SEE ALSO

       shef(1)

AUTHOR

       Chef was written by Adam Jacob adam@opscode.com with many contributions from the community.

DOCUMENTATION

       This manual page was written by Joshua Timberman joshua@opscode.com. Permission is granted to copy, distribute and / or modify  this  docu-
       ment under the terms of the Apache 2.0 License.

CHEF

       Knife is distributed with Chef. http://wiki.opscode.com/display/chef/Home

Chef 10.12.0							     June 2012							     KNIFE-EXEC(1)
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