X-Git-Url: https://git.distorted.org.uk/~mdw/sw-tools/blobdiff_plain/65eb98997977ba66bf96aff5e0cc8494ea03cdce..165b3d5cd16b4c9995916ea40eea9efe3ae9c93e:/src/sw_rsh.c

diff --git a/src/sw_rsh.c b/src/sw_rsh.c
index 785da7d..e054351 100644
--- a/src/sw_rsh.c
+++ b/src/sw_rsh.c
@@ -396,7 +396,7 @@ static void remote(sw_remote *r, const char *cmd, char *argv[], char *env[])
     sym_table t;
     sym_create(&t);
     env_import(&t, env);
-    if (env != environ) {
+    if (env[0] && env != environ) {
       free(env);
       env_import(&t, environ);
     }
@@ -538,7 +538,15 @@ void swrsh_remote(const char *cmd)
   r.fdin = 0;
   r.fdout = 1;
 
- /* --- Read packets from the remote host --- */
+  /* --- Object if stdin is a terminal --- */
+
+  if (isatty(STDIN_FILENO)) {
+    die(EXIT_FAILURE,
+	"don't use the `--remote' option unless "
+	"you know what you're doing.");
+  }
+
+  /* --- Read packets from the remote host --- */
 
   for (;;) {
     int t = pkrecv(&r);