1 files changed, 71 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/faccessat.c b/REORG.TODO/sysdeps/unix/sysv/linux/faccessat.c
new file mode 100644
index 0000000000..5aecb10840
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/faccessat.c
@@ -0,0 +1,71 @@
+/* Test for access to file, relative to open directory.  Linux version.
+   Copyright (C) 2006-2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <alloca.h>
+#include <sysdep.h>
+
+
+int
+faccessat (int fd, const char *file, int mode, int flag)
+{
+  if (flag & ~(AT_SYMLINK_NOFOLLOW | AT_EACCESS))
+    return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
+
+  if ((flag == 0 || ((flag & ~AT_EACCESS) == 0 && ! __libc_enable_secure)))
+    return INLINE_SYSCALL (faccessat, 3, fd, file, mode);
+
+  struct stat64 stats;
+  if (__fxstatat64 (_STAT_VER, fd, file, &stats, flag & AT_SYMLINK_NOFOLLOW))
+    return -1;
+
+  mode &= (X_OK | W_OK | R_OK);	/* Clear any bogus bits. */
+#if R_OK != S_IROTH || W_OK != S_IWOTH || X_OK != S_IXOTH
+# error Oops, portability assumptions incorrect.
+#endif
+
+  if (mode == F_OK)
+    return 0;			/* The file exists. */
+
+  uid_t uid = (flag & AT_EACCESS) ? __geteuid () : __getuid ();
+
+  /* The super-user can read and write any file, and execute any file
+     that anyone can execute. */
+  if (uid == 0 && ((mode & X_OK) == 0
+		   || (stats.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH))))
+    return 0;
+
+  int granted = (uid == stats.st_uid
+		 ? (unsigned int) (stats.st_mode & (mode << 6)) >> 6
+		 : (stats.st_gid == ((flag & AT_EACCESS)
+				     ? __getegid () : __getgid ())
+		    || __group_member (stats.st_gid))
+		 ? (unsigned int) (stats.st_mode & (mode << 3)) >> 3
+		 : (stats.st_mode & mode));
+
+  if (granted == mode)
+    return 0;
+
+  return INLINE_SYSCALL_ERROR_RETURN_VALUE (EACCES);
+}