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package gcplogs // import "github.com/docker/docker/daemon/logger/gcplogs"
import (
"os"
"github.com/docker/docker/dockerversion"
"github.com/docker/docker/pkg/homedir"
"github.com/sirupsen/logrus"
)
// ensureHomeIfIAmStatic ensure $HOME to be set if dockerversion.IAmStatic is "true".
// See issue #29344: gcplogs segfaults (static binary)
// If HOME is not set, logging.NewClient() will call os/user.Current() via oauth2/google.
// However, in static binary, os/user.Current() leads to segfault due to a glibc issue that won't be fixed
// in a short term. (golang/go#13470, https://sourceware.org/bugzilla/show_bug.cgi?id=19341)
// So we forcibly set HOME so as to avoid call to os/user/Current()
func ensureHomeIfIAmStatic() error {
// Note: dockerversion.IAmStatic and homedir.GetStatic() is only available for linux.
// So we need to use them in this gcplogging_linux.go rather than in gcplogging.go
if dockerversion.IAmStatic == "true" && os.Getenv("HOME") == "" {
home, err := homedir.GetStatic()
if err != nil {
return err
}
logrus.Warnf("gcplogs requires HOME to be set for static daemon binary. Forcibly setting HOME to %s.", home)
os.Setenv("HOME", home)
}
return nil
}
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