X-Git-Url: https://ruderich.org/simon/gitweb/?a=blobdiff_plain;f=cmd%2Fsafcm-remote%2Fmain.go;h=ab0bfae917286283e59bcb16af1c2ffabe15432a;hb=5d6cc7f14a4bacc36bf3a23cd735a75ad4a90f1d;hp=9c58d3af8175c337aa60a2b47bc1383105cc0226;hpb=ddd21f01f764a4ff61204d8e9d0ef8421ebf685c;p=safcm%2Fsafcm.git

diff --git a/cmd/safcm-remote/main.go b/cmd/safcm-remote/main.go
index 9c58d3a..ab0bfae 100644
--- a/cmd/safcm-remote/main.go
+++ b/cmd/safcm-remote/main.go
@@ -1,4 +1,4 @@
-// Helper copied to the remote hosts to run commands and deploy configuration
+// Helper copied to the remote host to run commands and deploy configuration
 
 // Copyright (C) 2021  Simon Ruderich
 //
@@ -22,6 +22,8 @@ import (
 	"log"
 	"os"
 
+	"golang.org/x/term"
+
 	"ruderich.org/simon/safcm"
 	"ruderich.org/simon/safcm/cmd/safcm-remote/ainsl"
 	"ruderich.org/simon/safcm/cmd/safcm-remote/info"
@@ -29,19 +31,31 @@ import (
 	"ruderich.org/simon/safcm/cmd/safcm-remote/sync"
 )
 
+func usage() {
+	log.Fatalf("usage: %[1]s sync\n"+
+		"usage: %[1]s ainsl [options] <path> <line>",
+		os.Args[0])
+}
+
 func main() {
 	// Timestamps are added by `safcm`
 	log.SetFlags(0)
 
+	if len(os.Args) < 2 {
+		usage()
+	}
+
 	var err error
-	if len(os.Args) == 1 {
+	switch os.Args[1] {
+	case "sync":
+		if len(os.Args) != 2 {
+			usage()
+		}
 		err = mainLoop()
-	} else if len(os.Args) >= 2 && os.Args[1] == "ainsl" {
+	case "ainsl":
 		err = ainsl.Main(os.Args)
-	} else {
-		log.Fatalf("usage: %[1]s\n"+
-			"usage: %[1]s ainsl [options] <path> <line>",
-			os.Args[0])
+	default:
+		usage()
 	}
 
 	if err != nil {
@@ -50,6 +64,12 @@ func main() {
 }
 
 func mainLoop() error {
+	if term.IsTerminal(int(os.Stdin.Fd())) ||
+		term.IsTerminal(int(os.Stdout.Fd())) {
+		return fmt.Errorf("sync should only be called from `safcm` " +
+			"(redirect stdin/stdout to circumvent this check)")
+	}
+
 	conn := safcm.NewGobConn(os.Stdin, os.Stdout)
 
 	var logLevel safcm.LogLevel