1 files changed, 84 insertions, 0 deletions
diff --git a/posix/bits/unistd.h b/posix/bits/unistd.h
new file mode 100644
index 0000000000..215063f07d
--- /dev/null
+++ b/posix/bits/unistd.h
@@ -0,0 +1,84 @@
+/* Checking macros for unistd functions.
+   Copyright (C) 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _UNISTD_H
+# error "Never include <bits/unistd.h> directly; use <unistd.h> instead."
+#endif
+
+extern ssize_t __read_chk (int __fd, void *__buf, size_t __nbytes,
+			   size_t __buflen) __wur;
+#define read(fd, buf, nbytes) \
+  (__bos0 (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (nbytes) || (nbytes) > __bos0 (buf))	      \
+   ? __read_chk (fd, buf, nbytes, __bos0 (buf))				      \
+   : read (fd, buf, nbytes))
+
+#ifdef __USE_UNIX98
+extern ssize_t __pread_chk (int __fd, void *__buf, size_t __nbytes,
+			    __off_t __offset, size_t __bufsize) __wur;
+extern ssize_t __pread64_chk (int __fd, void *__buf, size_t __nbytes,
+			      __off64_t __offset, size_t __bufsize) __wur;
+# ifndef __USE_FILE_OFFSET64
+#  define pread(fd, buf, nbytes, offset) \
+  (__bos0 (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (nbytes) || (nbytes) > __bos0 (buf))	      \
+   ? __pread64_chk (fd, buf, nbytes, offset, __bos0 (buf))		      \
+   : pread (fd, buf, offset, nbytes))
+# else
+#  define pread(fd, buf, nbytes, offset) \
+  (__bos0 (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (nbytes) || (nbytes) > __bos0 (buf))	      \
+   ? __pread_chk (fd, buf, nbytes, offset, __bos0 (buf))		      \
+   : pread (fd, buf, offset, nbytes))
+# endif
+
+# ifdef __USE_LARGEFILE64
+#  define pread64(fd, buf, nbytes, offset) \
+  (__bos0 (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (nbytes) || (nbytes) > __bos0 (buf))	      \
+   ? __pread64_chk (fd, buf, nbytes, offset, __bos0 (buf))		      \
+   : pread64 (fd, buf, offset, nbytes))
+# endif
+#endif
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K
+extern int __readlink_chk (__const char *__restrict __path,
+			   char *__restrict __buf, size_t __len,
+			   size_t __buflen)
+     __THROW __nonnull ((1, 2)) __wur;
+# define readlink(path, buf, len) \
+  (__bos (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (len) || (len) > __bos (buf))		      \
+   ? __readlink_chk (path, buf, len, __bos (buf))			      \
+   : readlink (path, buf, len))
+#endif
+
+extern char *__getcwd_chk (char *__buf, size_t __size, size_t __buflen)
+     __THROW __wur;
+#define getcwd(buf, size) \
+  (__bos (buf) != (size_t) -1						      \
+   && (!__builtin_constant_p (size) || (size) > __bos (buf))		      \
+   ? __getcwd_chk (buf, size, buflen) : getcwd (buf, size))
+
+#if defined __USE_BSD || defined __USE_XOPEN_EXTENDED
+extern char *__getwd_chk (char *__buf, size_t buflen)
+     __THROW __nonnull ((1)) __attribute_deprecated__ __wur;
+#define getwd(buf) \
+  (__bos (buf) != (size_t) -1 ? __getwd_chk (buf, buflen) : getwd (buf))
+#endif