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package srslog
import (
"errors"
"io"
"net"
)
// unixSyslog opens a connection to the syslog daemon running on the
// local machine using a Unix domain socket. This function exists because of
// Solaris support as implemented by gccgo. On Solaris you can not
// simply open a TCP connection to the syslog daemon. The gccgo
// sources have a syslog_solaris.go file that implements unixSyslog to
// return a type that satisfies the serverConn interface and simply calls the C
// library syslog function.
func unixSyslog() (conn serverConn, err error) {
logTypes := []string{"unixgram", "unix"}
logPaths := []string{"/dev/log", "/var/run/syslog", "/var/run/log"}
for _, network := range logTypes {
for _, path := range logPaths {
conn, err := net.Dial(network, path)
if err != nil {
continue
} else {
return &localConn{conn: conn}, nil
}
}
}
return nil, errors.New("Unix syslog delivery error")
}
// localConn adheres to the serverConn interface, allowing us to send syslog
// messages to the local syslog daemon over a Unix domain socket.
type localConn struct {
conn io.WriteCloser
}
// writeString formats syslog messages using time.Stamp instead of time.RFC3339,
// and omits the hostname (because it is expected to be used locally).
func (n *localConn) writeString(framer Framer, formatter Formatter, p Priority, hostname, tag, msg string) error {
if framer == nil {
framer = DefaultFramer
}
if formatter == nil {
formatter = UnixFormatter
}
_, err := n.conn.Write([]byte(framer(formatter(p, hostname, tag, msg))))
return err
}
// close the (local) network connection
func (n *localConn) close() error {
return n.conn.Close()
}
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