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os/user: cannot pick up sss users in nocgo mode #27412

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fmd opened this issue Aug 31, 2018 · 2 comments
Closed

os/user: cannot pick up sss users in nocgo mode #27412

fmd opened this issue Aug 31, 2018 · 2 comments
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FrozenDueToAge NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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@fmd
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fmd commented Aug 31, 2018

What version of Go are you using (go version)?

go version go1.9.1 linux/amd64

Problem:

the os/user package has moved off of using cgo system commands to find users. On our system (and many others), there are several users that don't appear in /etc/passwd, but on the system we can see them fine with getent passwd <USER> (because sssd handles this).

So, as the os/user package uses only /etc/passwd to look for users, go doesn't have a way (as far as i know) to get all the users without using getent or id directly.

How can we make Go able to find all of the users like getent or id can?
@dominikh
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the os/user package has moved off of using cgo system commands to find users

What makes you say that? Go still uses the libc for os/user, when building with cgo support enabled.

See for example https://github.com/golang/go/blob/master/src/os/user/cgo_lookup_unix.go.

@dominikh dominikh changed the title os/user cannot pick up sss users os/user: cannot pick up sss users Aug 31, 2018
@kevinburke
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Maybe you are cross compiling binaries? IIRC that causes the library to use pure Go instead of cgo.

@FiloSottile FiloSottile changed the title os/user: cannot pick up sss users os/user: cannot pick up sss users in nocgo mode Aug 31, 2018
@FiloSottile FiloSottile added the NeedsInvestigation Someone must examine and confirm this is a valid issue and not a duplicate of an existing one. label Aug 31, 2018
@FiloSottile FiloSottile added this to the Unplanned milestone Aug 31, 2018
@fmd fmd closed this as completed Sep 18, 2018
@golang golang locked and limited conversation to collaborators Sep 18, 2019
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