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Merge pull request #2359 from mitchellh/d-execute-command 

Document shell provisioner example for FreeBSD
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Chris Bednarski 2015-06-29 17:09:37 -07:00
parent caa518b294 6c2e6c41d9
commit 31357df126
1 changed files with 18 additions and 4 deletions
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website/source/docs/provisioners/shell.html.markdown
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@ -89,10 +89,14 @@ Optional parameters:
To many new users, the `execute_command` is puzzling. However, it provides To many new users, the `execute_command` is puzzling. However, it provides
an important function: customization of how the command is executed. The an important function: customization of how the command is executed. The
most common use case for this is dealing with **sudo password prompts**. most common use case for this is dealing with **sudo password prompts**. You may
also need to customize this if you use a non-POSIX shell, such as `tcsh` on
FreeBSD.
For example, if the default user of an installed operating system is "packer" ### Sudo Example
and has the password "packer" for sudo usage, then you'll likely want to
Some operating systems default to a non-root user. For example if you login
as `ubuntu` and can sudo using the password `packer`, then you'll want to
change `execute_command` to be: change `execute_command` to be:
```text ```text
@ -100,13 +104,23 @@ change `execute_command` to be:
``` ```
The `-S` flag tells `sudo` to read the password from stdin, which in this The `-S` flag tells `sudo` to read the password from stdin, which in this
case is being piped in with the value of "packer". The `-E` flag tells `sudo` case is being piped in with the value of `packer`. The `-E` flag tells `sudo`
to preserve the environment, allowing our environmental variables to work to preserve the environment, allowing our environmental variables to work
within the script. within the script.
By setting the `execute_command` to this, your script(s) can run with By setting the `execute_command` to this, your script(s) can run with
root privileges without worrying about password prompts. root privileges without worrying about password prompts.
### FreeBSD Example
FreeBSD's default shell is `tcsh`, which deviates from POSIX sematics. In order
for packer to pass environment variables you will need to change the
`execute_command` to:
chmod +x {{ .Path }}; env {{ .Vars }} {{ .Path }}
Note the addition of `env` before `{{ .Vars }}`.
## Default Environmental Variables ## Default Environmental Variables
In addition to being able to specify custom environmental variables using In addition to being able to specify custom environmental variables using