add package

[bytom/vapor.git] / vendor / github.com / hashicorp / go-plugin / process_posix.go

diff --git a/vendor/github.com/hashicorp/go-plugin/process_posix.go b/vendor/github.com/hashicorp/go-plugin/process_posix.go
new file mode 100644 (file)
index 0000000..70ba546
--- /dev/null
+++ b/vendor/github.com/hashicorp/go-plugin/process_posix.go
@@ -0,0 +1,19 @@
+// +build !windows
+
+package plugin
+
+import (
+       "os"
+       "syscall"
+)
+
+// _pidAlive tests whether a process is alive or not by sending it Signal 0,
+// since Go otherwise has no way to test this.
+func _pidAlive(pid int) bool {
+       proc, err := os.FindProcess(pid)
+       if err == nil {
+               err = proc.Signal(syscall.Signal(0))
+       }
+
+       return err == nil
+}