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-rw-r--r--jni/ruby/nacl/unistd.h9
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diff --git a/jni/ruby/nacl/unistd.h b/jni/ruby/nacl/unistd.h
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+++ b/jni/ruby/nacl/unistd.h
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+// Copyright 2012 Google Inc. All Rights Reserved.
+// Author: yugui@google.com (Yugui Sonoda)
+#ifndef RUBY_NACL_UNISTD_H
+#define RUBY_NACL_UNISTD_H
+int seteuid(pid_t pid);
+int setegid(pid_t pid);
+int truncate(const char* path, off_t new_size);
+int ftruncate(int fd, off_t new_size);
+#endif