diff options
Diffstat (limited to 'kube2msb/src/vendor/github.com/coreos/go-systemd/journal/journal.go')
-rw-r--r-- | kube2msb/src/vendor/github.com/coreos/go-systemd/journal/journal.go | 179 |
1 files changed, 0 insertions, 179 deletions
diff --git a/kube2msb/src/vendor/github.com/coreos/go-systemd/journal/journal.go b/kube2msb/src/vendor/github.com/coreos/go-systemd/journal/journal.go deleted file mode 100644 index 7f43499..0000000 --- a/kube2msb/src/vendor/github.com/coreos/go-systemd/journal/journal.go +++ /dev/null @@ -1,179 +0,0 @@ -// 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. - -// Package journal provides write bindings to the local systemd journal. -// It is implemented in pure Go and connects to the journal directly over its -// unix socket. -// -// To read from the journal, see the "sdjournal" package, which wraps the -// sd-journal a C API. -// -// http://www.freedesktop.org/software/systemd/man/systemd-journald.service.html -package journal - -import ( - "bytes" - "encoding/binary" - "errors" - "fmt" - "io" - "io/ioutil" - "net" - "os" - "strconv" - "strings" - "syscall" -) - -// Priority of a journal message -type Priority int - -const ( - PriEmerg Priority = iota - PriAlert - PriCrit - PriErr - PriWarning - PriNotice - PriInfo - PriDebug -) - -var conn net.Conn - -func init() { - var err error - conn, err = net.Dial("unixgram", "/run/systemd/journal/socket") - if err != nil { - conn = nil - } -} - -// Enabled returns true if the local systemd journal is available for logging -func Enabled() bool { - return conn != nil -} - -// Send a message to the local systemd journal. vars is a map of journald -// fields to values. Fields must be composed of uppercase letters, numbers, -// and underscores, but must not start with an underscore. Within these -// restrictions, any arbitrary field name may be used. Some names have special -// significance: see the journalctl documentation -// (http://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html) -// for more details. vars may be nil. -func Send(message string, priority Priority, vars map[string]string) error { - if conn == nil { - return journalError("could not connect to journald socket") - } - - data := new(bytes.Buffer) - appendVariable(data, "PRIORITY", strconv.Itoa(int(priority))) - appendVariable(data, "MESSAGE", message) - for k, v := range vars { - appendVariable(data, k, v) - } - - _, err := io.Copy(conn, data) - if err != nil && isSocketSpaceError(err) { - file, err := tempFd() - if err != nil { - return journalError(err.Error()) - } - defer file.Close() - _, err = io.Copy(file, data) - if err != nil { - return journalError(err.Error()) - } - - rights := syscall.UnixRights(int(file.Fd())) - - /* this connection should always be a UnixConn, but better safe than sorry */ - unixConn, ok := conn.(*net.UnixConn) - if !ok { - return journalError("can't send file through non-Unix connection") - } - unixConn.WriteMsgUnix([]byte{}, rights, nil) - } else if err != nil { - return journalError(err.Error()) - } - return nil -} - -// Print prints a message to the local systemd journal using Send(). -func Print(priority Priority, format string, a ...interface{}) error { - return Send(fmt.Sprintf(format, a...), priority, nil) -} - -func appendVariable(w io.Writer, name, value string) { - if !validVarName(name) { - journalError("variable name contains invalid character, ignoring") - } - if strings.ContainsRune(value, '\n') { - /* When the value contains a newline, we write: - * - the variable name, followed by a newline - * - the size (in 64bit little endian format) - * - the data, followed by a newline - */ - fmt.Fprintln(w, name) - binary.Write(w, binary.LittleEndian, uint64(len(value))) - fmt.Fprintln(w, value) - } else { - /* just write the variable and value all on one line */ - fmt.Fprintf(w, "%s=%s\n", name, value) - } -} - -func validVarName(name string) bool { - /* The variable name must be in uppercase and consist only of characters, - * numbers and underscores, and may not begin with an underscore. (from the docs) - */ - - valid := name[0] != '_' - for _, c := range name { - valid = valid && ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') || c == '_' - } - return valid -} - -func isSocketSpaceError(err error) bool { - opErr, ok := err.(*net.OpError) - if !ok { - return false - } - - sysErr, ok := opErr.Err.(syscall.Errno) - if !ok { - return false - } - - return sysErr == syscall.EMSGSIZE || sysErr == syscall.ENOBUFS -} - -func tempFd() (*os.File, error) { - file, err := ioutil.TempFile("/dev/shm/", "journal.XXXXX") - if err != nil { - return nil, err - } - syscall.Unlink(file.Name()) - if err != nil { - return nil, err - } - return file, nil -} - -func journalError(s string) error { - s = "journal error: " + s - fmt.Fprintln(os.Stderr, s) - return errors.New(s) -} |