Initial revision

1 files changed, 55 insertions, 0 deletions

diff --git a/lib/modechange.h b/lib/modechange.h
new file mode 100644
index 000000000..4a2988304
--- /dev/null
+++ b/lib/modechange.h
@@ -0,0 +1,55 @@
+/* modechange.h -- definitions for file mode manipulation
+   Copyright (C) 1989, 1990 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Masks for the `flags' field in a `struct mode_change'. */
+
+/* Affect the execute bits only if at least one execute bit is set already,
+   or if the file is a directory. */
+#define MODE_X_IF_ANY_X 01
+
+/* If set, copy some existing permissions for u, g, or o onto the other two.
+   Which of u, g, or o is copied is determined by which bits are set in the
+   `value' field. */
+#define MODE_COPY_EXISTING 02
+
+struct mode_change
+{
+  char op;			/* One of "=+-". */
+  char flags;			/* Special operations. */
+  unsigned short affected;	/* Set for u/g/o/s/s/t, if to be affected. */
+  unsigned short value;		/* Bits to add/remove. */
+  struct mode_change *next;	/* Link to next change in list. */
+};
+
+/* Masks for mode_compile argument. */
+#define MODE_MASK_EQUALS 1
+#define MODE_MASK_PLUS 2
+#define MODE_MASK_MINUS 4
+
+/* Error return values for mode_compile. */
+#define MODE_INVALID (struct mode_change *) 0
+#define MODE_MEMORY_EXHAUSTED (struct mode_change *) 1
+
+#ifdef __STDC__
+struct mode_change *mode_compile (char *, unsigned);
+unsigned short mode_adjust (unsigned, struct mode_change *);
+void mode_free (struct mode_change *);
+#else
+struct mode_change *mode_compile ();
+unsigned short mode_adjust ();
+void mode_free ();
+#endif