From b3514115101a1746badd6230a07039336121a7a2 Mon Sep 17 00:00:00 2001 From: Lantao Liu Date: Wed, 20 Jul 2016 20:36:58 -0700 Subject: [PATCH] Bump up go-systemd to 4484981625c1a6a2ecb40a390fcb6a9bcfee76e3. --- Godeps/Godeps.json | 13 +- .../github.com/coreos/go-systemd/dbus/dbus.go | 28 ++- .../coreos/go-systemd/dbus/methods.go | 59 ++++- .../github.com/coreos/go-systemd/util/util.go | 198 ++++++++++++++++- vendor/github.com/coreos/pkg/LICENSE | 202 ++++++++++++++++++ vendor/github.com/coreos/pkg/NOTICE | 5 + vendor/github.com/coreos/pkg/dlopen/dlopen.go | 82 +++++++ .../coreos/pkg/dlopen/dlopen_example.go | 56 +++++ 8 files changed, 620 insertions(+), 23 deletions(-) create mode 100644 vendor/github.com/coreos/pkg/LICENSE create mode 100644 vendor/github.com/coreos/pkg/NOTICE create mode 100644 vendor/github.com/coreos/pkg/dlopen/dlopen.go create mode 100644 vendor/github.com/coreos/pkg/dlopen/dlopen_example.go diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json index a7a1a01d..a84fa943 100644 --- a/Godeps/Godeps.json +++ b/Godeps/Godeps.json @@ -110,13 +110,18 @@ }, { "ImportPath": "github.com/coreos/go-systemd/dbus", - "Comment": "v4", - "Rev": "b4a58d95188dd092ae20072bac14cece0e67c388" + "Comment": "v8-2-g4484981", + "Rev": "4484981625c1a6a2ecb40a390fcb6a9bcfee76e3" }, { "ImportPath": "github.com/coreos/go-systemd/util", - "Comment": "v4", - "Rev": "b4a58d95188dd092ae20072bac14cece0e67c388" + "Comment": "v8-2-g4484981", + "Rev": "4484981625c1a6a2ecb40a390fcb6a9bcfee76e3" + }, + { + "ImportPath": "github.com/coreos/pkg/dlopen", + "Comment": "v2", + "Rev": "7f080b6c11ac2d2347c3cd7521e810207ea1a041" }, { "ImportPath": "github.com/coreos/rkt/api/v1alpha", diff --git a/vendor/github.com/coreos/go-systemd/dbus/dbus.go b/vendor/github.com/coreos/go-systemd/dbus/dbus.go index 5dd748e6..1699b903 100644 --- a/vendor/github.com/coreos/go-systemd/dbus/dbus.go +++ b/vendor/github.com/coreos/go-systemd/dbus/dbus.go @@ -86,7 +86,7 @@ type Conn struct { // New establishes a connection to the system bus and authenticates. // Callers should call Close() when done with the connection. func New() (*Conn, error) { - return newConnection(func() (*dbus.Conn, error) { + return NewConnection(func() (*dbus.Conn, error) { return dbusAuthHelloConnection(dbus.SystemBusPrivate) }) } @@ -95,7 +95,7 @@ func New() (*Conn, error) { // authenticates. This can be used to connect to systemd user instances. // Callers should call Close() when done with the connection. func NewUserConnection() (*Conn, error) { - return newConnection(func() (*dbus.Conn, error) { + return NewConnection(func() (*dbus.Conn, error) { return dbusAuthHelloConnection(dbus.SessionBusPrivate) }) } @@ -104,7 +104,7 @@ func NewUserConnection() (*Conn, error) { // This can be used for communicating with systemd without a dbus daemon. // Callers should call Close() when done with the connection. func NewSystemdConnection() (*Conn, error) { - return newConnection(func() (*dbus.Conn, error) { + return NewConnection(func() (*dbus.Conn, error) { // We skip Hello when talking directly to systemd. return dbusAuthConnection(func() (*dbus.Conn, error) { return dbus.Dial("unix:path=/run/systemd/private") @@ -118,13 +118,18 @@ func (c *Conn) Close() { c.sigconn.Close() } -func newConnection(createBus func() (*dbus.Conn, error)) (*Conn, error) { - sysconn, err := createBus() +// NewConnection establishes a connection to a bus using a caller-supplied function. +// This allows connecting to remote buses through a user-supplied mechanism. +// The supplied function may be called multiple times, and should return independent connections. +// The returned connection must be fully initialised: the org.freedesktop.DBus.Hello call must have succeeded, +// and any authentication should be handled by the function. +func NewConnection(dialBus func() (*dbus.Conn, error)) (*Conn, error) { + sysconn, err := dialBus() if err != nil { return nil, err } - sigconn, err := createBus() + sigconn, err := dialBus() if err != nil { sysconn.Close() return nil, err @@ -148,6 +153,17 @@ func newConnection(createBus func() (*dbus.Conn, error)) (*Conn, error) { return c, nil } +// GetManagerProperty returns the value of a property on the org.freedesktop.systemd1.Manager +// interface. The value is returned in its string representation, as defined at +// https://developer.gnome.org/glib/unstable/gvariant-text.html +func (c *Conn) GetManagerProperty(prop string) (string, error) { + variant, err := c.sysobj.GetProperty("org.freedesktop.systemd1.Manager." + prop) + if err != nil { + return "", err + } + return variant.String(), nil +} + func dbusAuthConnection(createBus func() (*dbus.Conn, error)) (*dbus.Conn, error) { conn, err := createBus() if err != nil { diff --git a/vendor/github.com/coreos/go-systemd/dbus/methods.go b/vendor/github.com/coreos/go-systemd/dbus/methods.go index ab614c7c..403c2f0f 100644 --- a/vendor/github.com/coreos/go-systemd/dbus/methods.go +++ b/vendor/github.com/coreos/go-systemd/dbus/methods.go @@ -199,6 +199,11 @@ func (c *Conn) GetUnitProperty(unit string, propertyName string) (*Property, err return c.getProperty(unit, "org.freedesktop.systemd1.Unit", propertyName) } +// GetServiceProperty returns property for given service name and property name +func (c *Conn) GetServiceProperty(service string, propertyName string) (*Property, error) { + return c.getProperty(service, "org.freedesktop.systemd1.Service", propertyName) +} + // GetUnitTypeProperties returns the extra properties for a unit, specific to the unit type. // Valid values for unitType: Service, Socket, Target, Device, Mount, Automount, Snapshot, Timer, Swap, Path, Slice, Scope // return "dbus.Error: Unknown interface" if the unitType is not the correct type of the unit @@ -221,6 +226,19 @@ func (c *Conn) GetUnitTypeProperty(unit string, unitType string, propertyName st return c.getProperty(unit, "org.freedesktop.systemd1."+unitType, propertyName) } +type UnitStatus struct { + Name string // The primary unit name as string + Description string // The human readable description string + LoadState string // The load state (i.e. whether the unit file has been loaded successfully) + ActiveState string // The active state (i.e. whether the unit is currently started or not) + SubState string // The sub state (a more fine-grained version of the active state that is specific to the unit type, which the active state is not) + Followed string // A unit that is being followed in its state by this unit, if there is any, otherwise the empty string. + Path dbus.ObjectPath // The unit object path + JobId uint32 // If there is a job queued for the job unit the numeric job id, 0 otherwise + JobType string // The job type as string + JobPath dbus.ObjectPath // The job object path +} + // ListUnits returns an array with all currently loaded units. Note that // units may be known by multiple names at the same time, and hence there might // be more unit names loaded than actual units behind them. @@ -250,17 +268,36 @@ func (c *Conn) ListUnits() ([]UnitStatus, error) { return status, nil } -type UnitStatus struct { - Name string // The primary unit name as string - Description string // The human readable description string - LoadState string // The load state (i.e. whether the unit file has been loaded successfully) - ActiveState string // The active state (i.e. whether the unit is currently started or not) - SubState string // The sub state (a more fine-grained version of the active state that is specific to the unit type, which the active state is not) - Followed string // A unit that is being followed in its state by this unit, if there is any, otherwise the empty string. - Path dbus.ObjectPath // The unit object path - JobId uint32 // If there is a job queued for the job unit the numeric job id, 0 otherwise - JobType string // The job type as string - JobPath dbus.ObjectPath // The job object path +type UnitFile struct { + Path string + Type string +} + +// ListUnitFiles returns an array of all available units on disk. +func (c *Conn) ListUnitFiles() ([]UnitFile, error) { + result := make([][]interface{}, 0) + err := c.sysobj.Call("org.freedesktop.systemd1.Manager.ListUnitFiles", 0).Store(&result) + if err != nil { + return nil, err + } + + resultInterface := make([]interface{}, len(result)) + for i := range result { + resultInterface[i] = result[i] + } + + files := make([]UnitFile, len(result)) + fileInterface := make([]interface{}, len(files)) + for i := range files { + fileInterface[i] = &files[i] + } + + err = dbus.Store(resultInterface, fileInterface...) + if err != nil { + return nil, err + } + + return files, nil } type LinkUnitFileChange EnableUnitFileChange diff --git a/vendor/github.com/coreos/go-systemd/util/util.go b/vendor/github.com/coreos/go-systemd/util/util.go index 33832a1e..e4ed8b26 100644 --- a/vendor/github.com/coreos/go-systemd/util/util.go +++ b/vendor/github.com/coreos/go-systemd/util/util.go @@ -13,15 +13,197 @@ // limitations under the License. // Package util contains utility functions related to systemd that applications -// can use to check things like whether systemd is running. +// can use to check things like whether systemd is running. Note that some of +// these functions attempt to manually load systemd libraries at runtime rather +// than linking against them. package util +// #include +// #include +// #include +// +// int +// my_sd_pid_get_owner_uid(void *f, pid_t pid, uid_t *uid) +// { +// int (*sd_pid_get_owner_uid)(pid_t, uid_t *); +// +// sd_pid_get_owner_uid = (int (*)(pid_t, uid_t *))f; +// return sd_pid_get_owner_uid(pid, uid); +// } +// +// int +// my_sd_pid_get_unit(void *f, pid_t pid, char **unit) +// { +// int (*sd_pid_get_unit)(pid_t, char **); +// +// sd_pid_get_unit = (int (*)(pid_t, char **))f; +// return sd_pid_get_unit(pid, unit); +// } +// +// int +// my_sd_pid_get_slice(void *f, pid_t pid, char **slice) +// { +// int (*sd_pid_get_slice)(pid_t, char **); +// +// sd_pid_get_slice = (int (*)(pid_t, char **))f; +// return sd_pid_get_slice(pid, slice); +// } +// +// int +// am_session_leader() +// { +// return (getsid(0) == getpid()); +// } +import "C" import ( + "fmt" + "io/ioutil" "os" + "strings" + "syscall" + "unsafe" + + "github.com/coreos/pkg/dlopen" ) +var libsystemdNames = []string{ + // systemd < 209 + "libsystemd-login.so.0", + "libsystemd-login.so", + + // systemd >= 209 merged libsystemd-login into libsystemd proper + "libsystemd.so.0", + "libsystemd.so", +} + +// GetRunningSlice attempts to retrieve the name of the systemd slice in which +// the current process is running. +// This function is a wrapper around the libsystemd C library; if it cannot be +// opened, an error is returned. +func GetRunningSlice() (slice string, err error) { + var h *dlopen.LibHandle + h, err = dlopen.GetHandle(libsystemdNames) + if err != nil { + return + } + defer func() { + if err1 := h.Close(); err1 != nil { + err = err1 + } + }() + + sd_pid_get_slice, err := h.GetSymbolPointer("sd_pid_get_slice") + if err != nil { + return + } + + var s string + sl := C.CString(s) + defer C.free(unsafe.Pointer(sl)) + + ret := C.my_sd_pid_get_slice(sd_pid_get_slice, 0, &sl) + if ret < 0 { + err = fmt.Errorf("error calling sd_pid_get_slice: %v", syscall.Errno(-ret)) + return + } + + return C.GoString(sl), nil +} + +// RunningFromSystemService tries to detect whether the current process has +// been invoked from a system service. The condition for this is whether the +// process is _not_ a user process. User processes are those running in session +// scopes or under per-user `systemd --user` instances. +// +// To avoid false positives on systems without `pam_systemd` (which is +// responsible for creating user sessions), this function also uses a heuristic +// to detect whether it's being invoked from a session leader process. This is +// the case if the current process is executed directly from a service file +// (e.g. with `ExecStart=/this/cmd`). Note that this heuristic will fail if the +// command is instead launched in a subshell or similar so that it is not +// session leader (e.g. `ExecStart=/bin/bash -c "/this/cmd"`) +// +// This function is a wrapper around the libsystemd C library; if this is +// unable to successfully open a handle to the library for any reason (e.g. it +// cannot be found), an errr will be returned +func RunningFromSystemService() (ret bool, err error) { + var h *dlopen.LibHandle + h, err = dlopen.GetHandle(libsystemdNames) + if err != nil { + return + } + defer func() { + if err1 := h.Close(); err1 != nil { + err = err1 + } + }() + + sd_pid_get_owner_uid, err := h.GetSymbolPointer("sd_pid_get_owner_uid") + if err != nil { + return + } + + var uid C.uid_t + errno := C.my_sd_pid_get_owner_uid(sd_pid_get_owner_uid, 0, &uid) + serrno := syscall.Errno(-errno) + // when we're running from a unit file, sd_pid_get_owner_uid returns + // ENOENT (systemd <220) or ENXIO (systemd >=220) + switch { + case errno >= 0: + ret = false + case serrno == syscall.ENOENT, serrno == syscall.ENXIO: + // Since the implementation of sessions in systemd relies on + // the `pam_systemd` module, using the sd_pid_get_owner_uid + // heuristic alone can result in false positives if that module + // (or PAM itself) is not present or properly configured on the + // system. As such, we also check if we're the session leader, + // which should be the case if we're invoked from a unit file, + // but not if e.g. we're invoked from the command line from a + // user's login session + ret = C.am_session_leader() == 1 + default: + err = fmt.Errorf("error calling sd_pid_get_owner_uid: %v", syscall.Errno(-errno)) + } + return +} + +// CurrentUnitName attempts to retrieve the name of the systemd system unit +// from which the calling process has been invoked. It wraps the systemd +// `sd_pid_get_unit` call, with the same caveat: for processes not part of a +// systemd system unit, this function will return an error. +func CurrentUnitName() (unit string, err error) { + var h *dlopen.LibHandle + h, err = dlopen.GetHandle(libsystemdNames) + if err != nil { + return + } + defer func() { + if err1 := h.Close(); err1 != nil { + err = err1 + } + }() + + sd_pid_get_unit, err := h.GetSymbolPointer("sd_pid_get_unit") + if err != nil { + return + } + + var s string + u := C.CString(s) + defer C.free(unsafe.Pointer(u)) + + ret := C.my_sd_pid_get_unit(sd_pid_get_unit, 0, &u) + if ret < 0 { + err = fmt.Errorf("error calling sd_pid_get_unit: %v", syscall.Errno(-ret)) + return + } + + unit = C.GoString(u) + return +} + // IsRunningSystemd checks whether the host was booted with systemd as its init -// system. This functions similar to systemd's `sd_booted(3)`: internally, it +// system. This functions similarly to systemd's `sd_booted(3)`: internally, it // checks whether /run/systemd/system/ exists and is a directory. // http://www.freedesktop.org/software/systemd/man/sd_booted.html func IsRunningSystemd() bool { @@ -31,3 +213,15 @@ func IsRunningSystemd() bool { } return fi.IsDir() } + +// GetMachineID returns a host's 128-bit machine ID as a string. This functions +// similarly to systemd's `sd_id128_get_machine`: internally, it simply reads +// the contents of /etc/machine-id +// http://www.freedesktop.org/software/systemd/man/sd_id128_get_machine.html +func GetMachineID() (string, error) { + machineID, err := ioutil.ReadFile("/etc/machine-id") + if err != nil { + return "", fmt.Errorf("failed to read /etc/machine-id: %v", err) + } + return strings.TrimSpace(string(machineID)), nil +} diff --git a/vendor/github.com/coreos/pkg/LICENSE b/vendor/github.com/coreos/pkg/LICENSE new file mode 100644 index 00000000..e06d2081 --- /dev/null +++ b/vendor/github.com/coreos/pkg/LICENSE @@ -0,0 +1,202 @@ +Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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We also recommend that a + file or class name and description of purpose be included on the + same "printed page" as the copyright notice for easier + identification within third-party archives. + + Copyright {yyyy} {name of copyright owner} + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. + diff --git a/vendor/github.com/coreos/pkg/NOTICE b/vendor/github.com/coreos/pkg/NOTICE new file mode 100644 index 00000000..b39ddfa5 --- /dev/null +++ b/vendor/github.com/coreos/pkg/NOTICE @@ -0,0 +1,5 @@ +CoreOS Project +Copyright 2014 CoreOS, Inc + +This product includes software developed at CoreOS, Inc. +(http://www.coreos.com/). diff --git a/vendor/github.com/coreos/pkg/dlopen/dlopen.go b/vendor/github.com/coreos/pkg/dlopen/dlopen.go new file mode 100644 index 00000000..23774f61 --- /dev/null +++ b/vendor/github.com/coreos/pkg/dlopen/dlopen.go @@ -0,0 +1,82 @@ +// Copyright 2016 CoreOS, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Package dlopen provides some convenience functions to dlopen a library and +// get its symbols. +package dlopen + +// #cgo LDFLAGS: -ldl +// #include +// #include +import "C" +import ( + "errors" + "fmt" + "unsafe" +) + +var ErrSoNotFound = errors.New("unable to open a handle to the library") + +// LibHandle represents an open handle to a library (.so) +type LibHandle struct { + Handle unsafe.Pointer + Libname string +} + +// GetHandle tries to get a handle to a library (.so), attempting to access it +// by the names specified in libs and returning the first that is successfully +// opened. Callers are responsible for closing the handler. If no library can +// be successfully opened, an error is returned. +func GetHandle(libs []string) (*LibHandle, error) { + for _, name := range libs { + libname := C.CString(name) + defer C.free(unsafe.Pointer(libname)) + handle := C.dlopen(libname, C.RTLD_LAZY) + if handle != nil { + h := &LibHandle{ + Handle: handle, + Libname: name, + } + return h, nil + } + } + return nil, ErrSoNotFound +} + +// GetSymbolPointer takes a symbol name and returns a pointer to the symbol. +func (l *LibHandle) GetSymbolPointer(symbol string) (unsafe.Pointer, error) { + sym := C.CString(symbol) + defer C.free(unsafe.Pointer(sym)) + + C.dlerror() + p := C.dlsym(l.Handle, sym) + e := C.dlerror() + if e != nil { + return nil, fmt.Errorf("error resolving symbol %q: %v", symbol, errors.New(C.GoString(e))) + } + + return p, nil +} + +// Close closes a LibHandle. +func (l *LibHandle) Close() error { + C.dlerror() + C.dlclose(l.Handle) + e := C.dlerror() + if e != nil { + return fmt.Errorf("error closing %v: %v", l.Libname, errors.New(C.GoString(e))) + } + + return nil +} diff --git a/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go b/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go new file mode 100644 index 00000000..48a66010 --- /dev/null +++ b/vendor/github.com/coreos/pkg/dlopen/dlopen_example.go @@ -0,0 +1,56 @@ +// Copyright 2015 CoreOS, Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. +// +// +build linux + +package dlopen + +// #include +// #include +// +// int +// my_strlen(void *f, const char *s) +// { +// size_t (*strlen)(const char *); +// +// strlen = (size_t (*)(const char *))f; +// return strlen(s); +// } +import "C" + +import ( + "fmt" + "unsafe" +) + +func strlen(libs []string, s string) (int, error) { + h, err := GetHandle(libs) + if err != nil { + return -1, fmt.Errorf(`couldn't get a handle to the library: %v`, err) + } + defer h.Close() + + f := "strlen" + cs := C.CString(s) + defer C.free(unsafe.Pointer(cs)) + + strlen, err := h.GetSymbolPointer(f) + if err != nil { + return -1, fmt.Errorf(`couldn't get symbol %q: %v`, f, err) + } + + len := C.my_strlen(strlen, cs) + + return int(len), nil +}