* libc/include/stdio.h (renameat): Declare for Cygwin.

	(symlinkat): Ditto.
	* libc/include/sys/unistd.h (readlink): Align declaration to POSIX.
	(faccessat): Declare for Cygwin.
	(fchownat): Ditto.
	(linkat): Ditto.
	(readlinkat): Ditto.
	* libc/include/sys/_default_fcntl.h (AT_FDCWD): Define for Cygwin.
	(AT_EACCESS): Ditto.
	(AT_SYMLINK_NOFOLLOW): Ditto.
	(AT_SYMLINK_FOLLOW): Ditto.
	(AT_REMOVEDIR): Ditto.
	(futimesat): Declare for Cygwin.
	(openat): Ditto.
	(unlinkat): Ditto.
	* libc/include/sys/stat.h (fchmodat): Ditto.
	(fstatat): Ditto.
	(mkdirat): Ditto.
	(mkfifoat): Ditto.
	(mknodat): Ditto.

3 files changed, 37 insertions, 1 deletions

diff --git a/newlib/libc/include/sys/_default_fcntl.h b/newlib/libc/include/sys/_default_fcntl.h
index b10503933..2a5dede44 100644
--- a/newlib/libc/include/sys/_default_fcntl.h
+++ b/newlib/libc/include/sys/_default_fcntl.h
@@ -131,6 +131,17 @@ extern "C" {
 #define	F_UNLKSYS	4	/* remove remote locks for a given system */
 #endif	/* !_POSIX_SOURCE */
 
+#ifdef __CYGWIN__
+/* Special descriptor value to denote the cwd in calls to openat(2) etc. */
+#define AT_FDCWD -2
+
+/* Flag values for faccessat2) et al. */
+#define AT_EACCESS              1
+#define AT_SYMLINK_NOFOLLOW     2
+#define AT_SYMLINK_FOLLOW       4
+#define AT_REMOVEDIR            8
+#endif
+
 /*#include <sys/stdtypes.h>*/
 
 #ifndef __CYGWIN__
@@ -166,6 +177,11 @@ struct eflock {
 extern int open _PARAMS ((const char *, int, ...));
 extern int creat _PARAMS ((const char *, mode_t));
 extern int fcntl _PARAMS ((int, int, ...));
+#ifdef __CYGWIN__
+extern int futimesat _PARAMS ((int, const char *, const struct timeval *));
+extern int openat _PARAMS ((int, const char *, int, ...));
+extern int unlinkat _PARAMS ((int, const char *, int));
+#endif
 
 /* Provide _<systemcall> prototypes for functions provided by some versions
    of newlib.  */
diff --git a/newlib/libc/include/sys/stat.h b/newlib/libc/include/sys/stat.h
index 1eb16ecd3..949508d6f 100644
--- a/newlib/libc/include/sys/stat.h
+++ b/newlib/libc/include/sys/stat.h
@@ -129,6 +129,14 @@ int	_EXFUN(lstat,( const char *__path, struct stat *__buf ));
 int	_EXFUN(mknod,( const char *__path, mode_t __mode, dev_t __dev ));
 #endif
 
+#if defined (__CYGWIN__)
+int	_EXFUN(fchmodat, (int, const char *, mode_t, int));
+int	_EXFUN(fstatat, (int, const char *, struct __stat64 *, int));
+int	_EXFUN(mkdirat, (int, const char *, mode_t));
+int	_EXFUN(mkfifoat, (int, const char *, mode_t));
+int	_EXFUN(mknodat, (int, const char *, mode_t, dev_t));
+#endif
+
 /* Provide prototypes for most of the _<systemcall> names that are
    provided in newlib for some compilers.  */
 #ifdef _COMPILING_NEWLIB
diff --git a/newlib/libc/include/sys/unistd.h b/newlib/libc/include/sys/unistd.h
index 025951819..fa7361a25 100644
--- a/newlib/libc/include/sys/unistd.h
+++ b/newlib/libc/include/sys/unistd.h
@@ -46,6 +46,9 @@ int     _EXFUN(execlp, (const char *__file, const char *, ... ));
 int     _EXFUN(execv, (const char *__path, char * const __argv[] ));
 int     _EXFUN(execve, (const char *__path, char * const __argv[], char * const __envp[] ));
 int     _EXFUN(execvp, (const char *__file, char * const __argv[] ));
+#if defined(__CYGWIN__)
+int	_EXFUN(faccessat, (int __dirfd, const char *__path, int __mode, int __flags));
+#endif
 #if defined(__CYGWIN__) || defined(__rtems__) || defined(__SPU__)
 int     _EXFUN(fchdir, (int __fildes));
 #endif
@@ -53,6 +56,9 @@ int     _EXFUN(fchmod, (int __fildes, mode_t __mode ));
 #if !defined(__INSIDE_CYGWIN__)
 int     _EXFUN(fchown, (int __fildes, uid_t __owner, gid_t __group ));
 #endif
+#if defined(__CYGWIN__)
+int	_EXFUN(fchownat, (int __dirfd, const char *__path, uid_t __owner, gid_t __group, int __flags));
+#endif
 pid_t   _EXFUN(fork, (void ));
 long    _EXFUN(fpathconf, (int __fd, int __name ));
 int     _EXFUN(fsync, (int __fd));
@@ -99,6 +105,9 @@ int     _EXFUN(isatty, (int __fildes ));
 int     _EXFUN(lchown, (const char *__path, uid_t __owner, gid_t __group ));
 #endif
 int     _EXFUN(link, (const char *__path1, const char *__path2 ));
+#if defined(__CYGWIN__)
+int     _EXFUN(linkat, (int __dirfd1, const char *__path1, int __dirfd2, const char *__path2, int __flags ));
+#endif
 int	_EXFUN(nice, (int __nice_value ));
 #if !defined(__INSIDE_CYGWIN__)
 off_t   _EXFUN(lseek, (int __fildes, off_t __offset, int __whence ));
@@ -226,7 +235,10 @@ void    _EXFUN(sync, (void));
 int     _EXFUN(sync, (void));
 #endif
 
-int     _EXFUN(readlink, (const char *__path, char *__buf, int __buflen));
+ssize_t _EXFUN(readlink, (const char *__path, char *__buf, size_t __buflen));
+#if defined(__CYGWIN__)
+ssize_t	_EXFUN(readlinkat, (int __dirfd1, const char *__path, char *__buf, size_t __buflen));
+#endif
 int     _EXFUN(symlink, (const char *__name1, const char *__name2));
 
 #define	F_OK	0