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71029cea2d
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
34 lines
695 B
Go
34 lines
695 B
Go
// Copyright (c) Tailscale Inc & AUTHORS
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// SPDX-License-Identifier: BSD-3-Clause
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// Package groupmember verifies group membership of the provided user on the
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// local system.
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package groupmember
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import (
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"os/user"
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)
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// IsMemberOfGroup reports whether the provided user is a member of
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// the provided system group.
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func IsMemberOfGroup(group, userName string) (bool, error) {
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u, err := user.Lookup(userName)
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if err != nil {
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return false, err
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}
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ugids, err := u.GroupIds()
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if err != nil {
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return false, err
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}
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g, err := user.LookupGroup(group)
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if err != nil {
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return false, err
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}
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for _, ugid := range ugids {
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if g.Gid == ugid {
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return true, nil
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}
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}
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return false, nil
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}
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