github.com/lazyboychen7/engine@v17.12.1-ce-rc2+incompatible/daemon/listeners/group_unix.go (about)

     1  // +build !windows
     2  
     3  package listeners
     4  
     5  import (
     6  	"fmt"
     7  	"strconv"
     8  
     9  	"github.com/opencontainers/runc/libcontainer/user"
    10  	"github.com/pkg/errors"
    11  )
    12  
    13  const defaultSocketGroup = "docker"
    14  
    15  func lookupGID(name string) (int, error) {
    16  	groupFile, err := user.GetGroupPath()
    17  	if err != nil {
    18  		return -1, errors.Wrap(err, "error looking up groups")
    19  	}
    20  	groups, err := user.ParseGroupFileFilter(groupFile, func(g user.Group) bool {
    21  		return g.Name == name || strconv.Itoa(g.Gid) == name
    22  	})
    23  	if err != nil {
    24  		return -1, errors.Wrapf(err, "error parsing groups for %s", name)
    25  	}
    26  	if len(groups) > 0 {
    27  		return groups[0].Gid, nil
    28  	}
    29  	gid, err := strconv.Atoi(name)
    30  	if err == nil {
    31  		return gid, nil
    32  	}
    33  	return -1, fmt.Errorf("group %s not found", name)
    34  }