diff options
Diffstat (limited to 'vendor/github.com/coreos/go-systemd/activation/files.go')
| -rw-r--r-- | vendor/github.com/coreos/go-systemd/activation/files.go | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/vendor/github.com/coreos/go-systemd/activation/files.go b/vendor/github.com/coreos/go-systemd/activation/files.go index c8e85fcd5..29dd18def 100644 --- a/vendor/github.com/coreos/go-systemd/activation/files.go +++ b/vendor/github.com/coreos/go-systemd/activation/files.go @@ -18,18 +18,26 @@ package activation import ( "os" "strconv" + "strings" "syscall" ) -// based on: https://gist.github.com/alberts/4640792 const ( + // listenFdsStart corresponds to `SD_LISTEN_FDS_START`. listenFdsStart = 3 ) +// Files returns a slice containing a `os.File` object for each +// file descriptor passed to this process via systemd fd-passing protocol. +// +// The order of the file descriptors is preserved in the returned slice. +// `unsetEnv` is typically set to `true` in order to avoid clashes in +// fd usage and to avoid leaking environment flags to child processes. func Files(unsetEnv bool) []*os.File { if unsetEnv { defer os.Unsetenv("LISTEN_PID") defer os.Unsetenv("LISTEN_FDS") + defer os.Unsetenv("LISTEN_FDNAMES") } pid, err := strconv.Atoi(os.Getenv("LISTEN_PID")) @@ -42,10 +50,17 @@ func Files(unsetEnv bool) []*os.File { return nil } + names := strings.Split(os.Getenv("LISTEN_FDNAMES"), ":") + files := make([]*os.File, 0, nfds) for fd := listenFdsStart; fd < listenFdsStart+nfds; fd++ { syscall.CloseOnExec(fd) - files = append(files, os.NewFile(uintptr(fd), "LISTEN_FD_"+strconv.Itoa(fd))) + name := "LISTEN_FD_" + strconv.Itoa(fd) + offset := fd - listenFdsStart + if offset < len(names) && len(names[offset]) > 0 { + name = names[offset] + } + files = append(files, os.NewFile(uintptr(fd), name)) } return files |