From baef6eff36775dd3d1762e5821703fec22168ad7 Mon Sep 17 00:00:00 2001 From: Giuseppe Scrivano Date: Fri, 2 Oct 2020 08:53:54 +0200 Subject: rootless: move GetAvailableGids to the rootless pkg Signed-off-by: Giuseppe Scrivano --- pkg/rootless/rootless.go | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'pkg/rootless') diff --git a/pkg/rootless/rootless.go b/pkg/rootless/rootless.go index d02721ea9..3c33597b6 100644 --- a/pkg/rootless/rootless.go +++ b/pkg/rootless/rootless.go @@ -4,6 +4,7 @@ import ( "os" "github.com/containers/storage" + "github.com/opencontainers/runc/libcontainer/user" "github.com/pkg/errors" ) @@ -46,3 +47,17 @@ func TryJoinPauseProcess(pausePidPath string) (bool, int, error) { } return became, ret, err } + +// GetAvailableGids returns how many GIDs are available in the +// current user namespace. +func GetAvailableGids() (int64, error) { + idMap, err := user.ParseIDMapFile("/proc/self/gid_map") + if err != nil { + return 0, err + } + count := int64(0) + for _, r := range idMap { + count += r.Count + } + return count, nil +} -- cgit v1.2.3-54-g00ecf