vendor latest containers/psgo

Signed-off-by: Valentin Rothberg <vrothberg@suse.com>

Closes: #1162
Approved by: rhatdan

vendor/github.com/containers/psgo/internal/proc/cmdline.go

@@ -0,0 +1,22 @@
+package proc
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+)
+
+// ParseCmdLine parses a /proc/$pid/cmdline file and returns a string slice.
+func ParseCmdLine(pid string) ([]string, error) {
+	data, err := ioutil.ReadFile(fmt.Sprintf("/proc/%s/cmdline", pid))
+	if err != nil {
+		return nil, err
+	}
+
+	cmdLine := []string{}
+	for _, rawCmd := range bytes.Split(data, []byte{0}) {
+		cmdLine = append(cmdLine, string(rawCmd))
+	}
+
+	return cmdLine, nil
+}