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diff --git a/primos/primos.c b/primos/primos.c
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+/*
+** primos.c
+**
+** This file contains emulation routines for some common Unix functions
+**
+** Author: Peter Eriksson <pen@lysator.liu.se>
+*/
+
+#ifdef __50SERIES
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+
+uid_t  primos_uid = 42;
+gid_t  primos_gid = 42;
+mode_t primos_mode = 600;
+
+/* Dummy do-nothing routine for chmod() */
+int chmod(path, mode)
+  char *path;
+  int mode;
+{
+   return 0;
+}
+
+char *getenv(var)
+  char *var;
+{
+  char buf[256];
+  extern char *gvget();
+  
+  buf[0] = '.';
+  strcpy(buf+1, var);
+
+  return gvget(buf);
+}
+
+
+unlink(path)
+  char *path;
+{
+  return delete(path);
+}
+ 
+int lstat(path, buf)
+  char *path;
+  struct stat *buf;
+{
+  return stat(path, buf);
+}
+
+int stat(path, buf)
+  char *path;
+  struct stat *buf;
+{
+  buf->st_dev     = 1;
+  buf->st_ino     = 1;
+  buf->st_nlink   = 1;
+  buf->st_uid     = primos_uid;
+  buf->st_gid     = primos_gid;
+  buf->st_rdev    = 1;
+  buf->st_blksize = 2048;
+
+  buf->st_rwlock = frwlock(path);
+  switch (buf->st_type = ftype(path))
+  {
+    case 0:
+    case 1:
+      /* Regular file (SAM or DAM) */
+      buf->st_size   = fsize(path);
+      buf->st_mtime  = fdtm(path);
+
+      buf->st_mode = S_IFREG|primos_mode;
+      break;
+
+    case 4:
+      buf->st_size = 0;
+      buf->st_mtime = fdtm(path);
+
+      buf->st_mode = S_IFDIR|primos_mode;
+      break;
+
+    case -1:
+      return -1;
+      
+    default:
+      buf->st_mode = primos_mode;
+      buf->st_size = fsize(path);
+      buf->st_mtime = fdtm(path);
+  }
+
+  buf->st_blocks = (buf->st_size-1) / buf->st_blksize + 1;
+
+  /* Should be fixed to really fetch these values, but that
+   * would require calling some PRIMOS subroutines and I don't have
+   * a copy of the Primos Subroutine reference manuals here..
+   */
+  buf->st_atime = buf->st_mtime;
+  buf->st_ctime = buf->st_mtime;
+  
+  return 0;
+}
+
+int fstat(fd, buf)
+  int fd;
+  struct stat *buf;
+{
+  char path[1025];
+
+  return stat(getname(fd, path), buf);
+}
+
+int ascii2pascii(c)
+  int c;
+{
+  return (c ? (c | 0x80) : '\0');
+}
+
+
+#endif /* __50SERIES */