--- coreutils-5.94/src/cut.c	2005-08-12 07:16:25.000000000 +0000
+++ coreutils-5.94-buf/src/cut.c	2006-04-04 08:32:26.000000000 +0000
@@ -738,6 +738,47 @@
   return true;
 }
 
+FILE* fd_to_stream(int fd)
+{
+    switch (fd) {
+        case STDIN_FILENO:  return stdin;
+        case STDOUT_FILENO: return stdout;
+        case STDERR_FILENO: return stderr;
+        default:            return (FILE*)NULL;
+    }
+}
+
+void config_stream_buffers(void)
+{
+    int num_to_check=3;
+    int fd;
+    for (fd=0; fd<num_to_check; fd++) {
+        FILE* stream = fd_to_stream(fd);
+        if (!stream) continue;
+        char name[20];
+        snprintf(name,sizeof(name),"BUF_%d_",fd);
+        char* value_str=getenv(name);
+        if (!value_str) continue;
+        char* unparsed;
+        long int value=strtol(value_str,&unparsed,0);
+        if (*unparsed) value=-1;
+        if (value == 0) {
+            setvbuf(stream, (char*)NULL, _IONBF, 0);
+        } else if (value == 1) {
+            setvbuf(stream, (char*)NULL, _IOLBF, 0);
+        } else if (value > 1) {
+            char* buf = malloc(value);
+            if (!buf) {
+                fprintf(stderr,"Error allocating buffer of %ld bytes\n",value);
+            } else {
+                setvbuf(stream, buf, _IOFBF, value);
+            }
+        } else {
+            fprintf(stderr,"Error value in %s=%s\n",name,value_str);
+        }
+    }
+}
+
 int
 main (int argc, char **argv)
 {
@@ -746,6 +787,7 @@
   bool delim_specified = false;
   char *spec_list_string IF_LINT(= NULL);
 
+  config_stream_buffers(); //must call before any stdio functions used
   initialize_main (&argc, &argv);
   program_name = argv[0];
   setlocale (LC_ALL, "");