Error: EACCES: permission denied, mkdir '.tmp' after adding mailin

[Giles Roadnight]

Hi All

I wrote a small node that wraps mailin and allows node-red to respond to emails that are sent direct to node-red rather than polling some email server.

My repo:

https://github.com/Roaders/node-red-contrib-mailinSMTP

Mailin Repo:

https://github.com/Flolagale/mailin

I got this working no problem at all on my windows desktop but when I install it on my raspberry pi it is not very happy. It seems that it does not have the required permissions to create directories.

After I install the node, add a node to the flow and restart node-red I get the stack trace at the bottom of the email in an infinite reboot loop.

How to I give node-red permission to create the directories?

Note: I am very new to linux and raspbian. The last time I had this problem I broke sudo with a chmod command I found somewhere and had to re-install my pi from scratch!

Thanks for the help.

Welcome to Node-RED

===================

6 May 04:53:53 - [info] Node-RED version: v0.13.4

6 May 04:53:53 - [info] Node.js  version: v4.4.3

6 May 04:53:53 - [info] Linux 4.1.19-v7+ arm LE

6 May 04:53:53 - [info] Loading palette nodes

pi : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/bin/python -u /usr/lib/node_modules/node-red/nodes/core/hardware/nrgpio.py info

pam_unix(sudo:session): session opened for user root by (uid=0)

pam_unix(sudo:session): session closed for user root

warn: Either spamassassin or spamc are not available. Spam score computation is disabled.

6 May 04:54:00 - [info] Settings file  : /home/pi/.node-red/settings.js

6 May 04:54:00 - [info] User directory : /home/pi/.node-red

6 May 04:54:00 - [info] Flows file : /home/pi/.node-red/flows_pi.json

6 May 04:54:00 - [info] Server now running at http://127.0.0.1:1880/admin/

6 May 04:54:00 - [info] Starting flows

shell.js: internal error

Error: EACCES: permission denied, mkdir '.tmp'

at Error (native)

at Object.fs.mkdirSync (fs.js:794:18)

at mkdirSyncRecursive (/home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/node_modules/mailin/node_modules/shelljs/src/mkdir.js:11:8)

at /home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/node_modules/mailin/node_modules/shelljs/src/mkdir.js:63:7

at Array.forEach (native)

at Object._mkdir (/home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/node_modules/mailin/node_modules/shelljs/src/mkdir.js:48:8)

at Object.mkdir (/home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/node_modules/mailin/node_modules/shelljs/src/common.js:186:23)

at Mailin.start (/home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/node_modules/mailin/lib/mailin.js:73:15)

at new MailinSMTP (/home/pi/.node-red/node_modules/node-red-contrib-mailin-smtp/mailinSMTP.js:15:10)

at createNode (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/Flow.js:276:18)

at Flow.start (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/Flow.js:64:35)

at start (/usr/lib/node_modules/node-red/red/runtime/nodes/flows/index.js:264:29)

at tryCatchReject (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:845:30)

at runContinuation1 (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:804:4)

at Fulfilled.when (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:592:4)

at Pending.run (/usr/lib/node_modules/node-red/node_modules/when/lib/makePromise.js:483:13)

nodered.service: main process exited, code=exited, status=1/FAILURE

Unit nodered.service entered failed state.

[Dave C-J]

Hi Giles,

well it depends where it is trying to create the directory... from the look of it is trying to create .tmp in the current working directory. Which may well be /  which would and should be blocked :-)...

Maybe look at the variable __dirname - as that may be pointing to the directory where you are installed - which should be under .node-red/node_modules somewhere - which should be owned by the current user and so may have a better chance of being accessible 

see - https://nodejs.org/docs/latest/api/globals.html#globals_dirname

[Giles Roadnight]

Aha - thank you very much. I've fixed it locally.

Turns out that there's a configuration object that I can pass to mailin and tell it where to create it's temporary folder. I temporarily set it to /var/tmp/mailin but it seems that I should probably use os.tmpdir(). Perhaps mailin should do that...

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