diff options
Diffstat (limited to 'vendor/github.com/godbus/dbus/v5/conn_other.go')
-rw-r--r-- | vendor/github.com/godbus/dbus/v5/conn_other.go | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/vendor/github.com/godbus/dbus/v5/conn_other.go b/vendor/github.com/godbus/dbus/v5/conn_other.go new file mode 100644 index 000000000..616dcf664 --- /dev/null +++ b/vendor/github.com/godbus/dbus/v5/conn_other.go @@ -0,0 +1,93 @@ +// +build !darwin + +package dbus + +import ( + "bytes" + "errors" + "fmt" + "io/ioutil" + "os" + "os/exec" + "os/user" + "path" + "strings" +) + +var execCommand = exec.Command + +func getSessionBusPlatformAddress() (string, error) { + cmd := execCommand("dbus-launch") + b, err := cmd.CombinedOutput() + + if err != nil { + return "", err + } + + i := bytes.IndexByte(b, '=') + j := bytes.IndexByte(b, '\n') + + if i == -1 || j == -1 || i > j { + return "", errors.New("dbus: couldn't determine address of session bus") + } + + env, addr := string(b[0:i]), string(b[i+1:j]) + os.Setenv(env, addr) + + return addr, nil +} + +// tryDiscoverDbusSessionBusAddress tries to discover an existing dbus session +// and return the value of its DBUS_SESSION_BUS_ADDRESS. +// It tries different techniques employed by different operating systems, +// returning the first valid address it finds, or an empty string. +// +// * /run/user/<uid>/bus if this exists, it *is* the bus socket. present on +// Ubuntu 18.04 +// * /run/user/<uid>/dbus-session: if this exists, it can be parsed for the bus +// address. present on Ubuntu 16.04 +// +// See https://dbus.freedesktop.org/doc/dbus-launch.1.html +func tryDiscoverDbusSessionBusAddress() string { + if runtimeDirectory, err := getRuntimeDirectory(); err == nil { + + if runUserBusFile := path.Join(runtimeDirectory, "bus"); fileExists(runUserBusFile) { + // if /run/user/<uid>/bus exists, that file itself + // *is* the unix socket, so return its path + return fmt.Sprintf("unix:path=%s", runUserBusFile) + } + if runUserSessionDbusFile := path.Join(runtimeDirectory, "dbus-session"); fileExists(runUserSessionDbusFile) { + // if /run/user/<uid>/dbus-session exists, it's a + // text file // containing the address of the socket, e.g.: + // DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-E1c73yNqrG + + if f, err := ioutil.ReadFile(runUserSessionDbusFile); err == nil { + fileContent := string(f) + + prefix := "DBUS_SESSION_BUS_ADDRESS=" + + if strings.HasPrefix(fileContent, prefix) { + address := strings.TrimRight(strings.TrimPrefix(fileContent, prefix), "\n\r") + return address + } + } + } + } + return "" +} + +func getRuntimeDirectory() (string, error) { + if currentUser, err := user.Current(); err != nil { + return "", err + } else { + return fmt.Sprintf("/run/user/%s", currentUser.Uid), nil + } +} + +func fileExists(filename string) bool { + if _, err := os.Stat(filename); !os.IsNotExist(err) { + return true + } else { + return false + } +} |