45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
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package daemon
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import (
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"errors"
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"os"
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)
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var errNotSupported = errors.New("daemon: Non-POSIX OS is not supported")
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// Mark of daemon process - system environment variable _GO_DAEMON=1
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const (
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MARK_NAME = "_GO_DAEMON"
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MARK_VALUE = "1"
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)
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// Default file permissions for log and pid files.
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const FILE_PERM = os.FileMode(0640)
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// WasReborn returns true in child process (daemon) and false in parent process.
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func WasReborn() bool {
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return os.Getenv(MARK_NAME) == MARK_VALUE
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}
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// Reborn runs second copy of current process in the given context.
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// function executes separate parts of code in child process and parent process
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// and provides demonization of child process. It look similar as the
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// fork-daemonization, but goroutine-safe.
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// In success returns *os.Process in parent process and nil in child process.
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// Otherwise returns error.
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func (d *Context) Reborn() (child *os.Process, err error) {
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return d.reborn()
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}
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// Search searches daemons process by given in context pid file name.
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// If success returns pointer on daemons os.Process structure,
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// else returns error. Returns nil if filename is empty.
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func (d *Context) Search() (daemon *os.Process, err error) {
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return d.search()
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}
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// Release provides correct pid-file release in daemon.
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func (d *Context) Release() (err error) {
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return d.release()
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}
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