1 files changed, 25 insertions, 5 deletions
diff --git a/Build/source/utils/asymptote/interact.cc b/Build/source/utils/asymptote/interact.cc
index dd0bfd68a20..7f30b7034bc 100644
--- a/Build/source/utils/asymptote/interact.cc
+++ b/Build/source/utils/asymptote/interact.cc
@@ -72,7 +72,7 @@ void init_completion() {
 
 char *(*Readline)(const char *prompt);
 
-char *verbatimreadline(const char *prompt)
+char *readverbatimline(const char *prompt)
 {
   if(!cin.good()) {cin.clear(); return NULL;}
   cout << prompt;
@@ -81,14 +81,34 @@ char *verbatimreadline(const char *prompt)
   return StrdupMalloc(s);
 }
   
+FILE *fin=NULL;
+
+char *readpipeline(const char *prompt)
+{
+  const int max_size=256;
+  static char buf[max_size];
+  ostringstream s;
+  do {
+    if(fgets(buf,max_size-1,fin) == NULL) break;
+    s << buf;
+  } while(buf[strlen(buf)-1] != '\n');
+  return StrdupMalloc(s.str());
+}
+  
 void pre_readline()
 {
+  int fd=intcast(settings::getSetting<Int>("inpipe"));
+  if(fd >= 0) {
+    if(!fin) fin=fdopen(fd,"r");
+    Readline=readpipeline;
+  } else {
 #if defined(HAVE_LIBREADLINE) && defined(HAVE_LIBCURSES)
-  if(tty) {
-    Readline=readline;
-  } else
+    if(tty) {
+      Readline=readline;
+    } else
 #endif
-    Readline=verbatimreadline;
+      Readline=readverbatimline;
+  }
 }
 
 void init_interactive()