yq fails to process files in /tmp

[mxchist]

Hello. Decide not to open issue, 'cause there is may be my mistake

Describe the issue
The yq throws Error: open /tmp/who_uses_this_service.yaml: no such file or directory error when I try to process a file placed in /tmp directory. Moreover, yq can process files in any descendant location of /home directory, but if you will copy this file in /tmp then yq will throw the same error.

Version of yq: 4.26.1
Operating system: Linux 5.15.0-43-generic #46~20.04.1-Ubuntu SMP
Installed via: snap

How to reproduce
In this example I will use /tmp/who_uses_this_service.yaml.
First, I check that there is already no who_uses_this_service.yaml in /tmp.
Then, check the current time: date --rfc-3339=ns:
2022-08-10 01:59:13.065172044+03:00

So, lets create file who_uses_this_service.yaml in any descendant directory of /home:

datacenter:
  dataline:
    crm-coupon:
      api:
        - 10.0.10.10

If you will query this file with yq, for example, yq '.datacenter.dataline.crm-coupon.api[1]' who_uses_this_service.yaml, you get the result (10.0.10.10).

So, now copy it in /tmp: cp who_uses_this_service.yaml /tmp/who_uses_this_service.yaml. Then run the same query, yq '.datacenter.dataline.crm-coupon.api[1]' /tmp/who_uses_this_service.yaml. You will get an error:
Error: open /tmp/who_uses_this_service.yaml: no such file or directory

Check the creation time and access mode:
-rw-rw-r-- 1 mxchist mxchist 9907 2022-08-10 02:02:49.765757989 +0300 /tmp/pods.yaml
File created, and its creation time greater then the last date --rfc-3339=ns result. Both user and group is mxchist, my own. I can easily open and editing it.
May be, there is lack of access rights anyway? Try run it from within the superuser:
sudo yq '.datacenter.dataline.crm-coupon.api[1]' /tmp/who_uses_this_service.yaml
Nevertheless, still Error: open /tmp/who_uses_this_service.yaml: no such file or directory throwing
I tried different files from different sources, and every file with its own query, and all the time the same result: works in normal directory, fails in /tmp.

[andry81]

The same issue under Cygwin environment in Windows: Error: open /tmp/tmp.XXXXXXXXXX/...: The system cannot find the path specified.
I've thought it somehow connected to the Cygwin shell itself, because there is nothing wrong with the /tmp directory credentials. They are just the same as for all other directories.

[mikefarah]

I think it's highly likely that this is a snap confinement issue see the readme for details. Have you tried download the binary from github and seeing if that works?

[andry81]

I think it's highly likely that this is a snap confinement issue see the readme for details. Have you tried download the binary from github and seeing if that works?

You are right. If try to put the executable into cygwin /bin, then it tries to use /tmp (through the mktemp). But if directly use the windows style path, then it does work as expected. The Cygwin just does not convert it for a windows executable.

[mxchist]

That is. When remove yq in snap and install it with wget instead, files in /tmp began processing.
After this, also, invoking the yq throws error bash: /snap/bin/yq: No such file or directory. It happens while the current shell window not been closed, or source command not been invoked. Is it the snap issue, or yq's?

[mikefarah]

Seems like snap and maybe a bash PATH env issue to me.