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// Copyright (c) 2021, Sylabs Inc. All rights reserved.
// This software is licensed under a 3-clause BSD license. Please consult the
// LICENSE.md file distributed with the sources of this project regarding your
// rights to use or distribute this software.
package user
import (
"os/user"
"strconv"
"github.com/sylabs/singularity/v4/pkg/sylog"
"github.com/sylabs/singularity/v4/pkg/util/slice"
)
// UIDInList returns true if the user with supplied uid is in list (match by uid or username).
// List is a string slice that may contain UIDs, usernames, or both.
func UIDInList(uid int, list []string) (bool, error) {
uidStr := strconv.Itoa(uid)
u, err := lookupUnixUid(uid)
if err != nil {
return false, err
}
return slice.ContainsAnyString(list, []string{uidStr, u.Name}), nil
}
// UIDInAnyGroup returns true if the user with supplied uid is a member of any group in list.
// List is a string slice that may contain GIDs, groupnames, or both.
func UIDInAnyGroup(uid int, list []string) (bool, error) {
uidStr := strconv.Itoa(uid)
u, err := user.LookupId(uidStr)
if err != nil {
return false, err
}
// Get the numeric GIDs
userGroups, err := u.GroupIds()
if err != nil {
return false, err
}
// Append the group names
for _, g := range userGroups {
gname, err := user.LookupGroupId(g)
if err != nil {
sylog.Warningf("while looking up gid %s: %v", g, err)
continue
}
userGroups = append(userGroups, gname.Name)
}
// Match on the GIDs or group names
return slice.ContainsAnyString(list, userGroups), nil
}
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