/* modechange.c -- file mode manipulation
- Copyright (C) 1989, 1990 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1990, 1997, 1998 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
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. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Written by David MacKenzie <djm@ai.mit.edu> */
changing the mode of many files, this probably results in a
performance gain. */
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
#include <sys/types.h>
#include <sys/stat.h>
#include "modechange.h"
-#ifdef STDC_HEADERS
-#include <stdlib.h>
+#if STDC_HEADERS
+# include <stdlib.h>
#else
char *malloc ();
#endif
#ifndef NULL
-#define NULL 0
+# define NULL 0
+#endif
+
+#if STAT_MACROS_BROKEN
+# undef S_ISDIR
#endif
-#ifndef S_ISDIR
-#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+#if !defined(S_ISDIR) && defined(S_IFDIR)
+# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
#endif
/* Return newly allocated memory to hold one element of type TYPE. */
#define isodigit(c) ((c) >= '0' && (c) <= '7')
-static int oatoi ();
+/* Return a positive integer containing the value of the ASCII
+ octal number S. If S is not an octal number, return -1. */
+
+static int
+oatoi (const char *s)
+{
+ register int i;
+
+ if (*s == 0)
+ return -1;
+ for (i = 0; isodigit (*s); ++s)
+ i = i * 8 + *s - '0';
+ if (*s)
+ return -1;
+ return i;
+}
/* Return a linked list of file mode change operations created from
MODE_STRING, an ASCII string that contains either an octal number
return MODE_MEMORY_EXHAUSTED if there is insufficient memory. */
struct mode_change *
-mode_compile (mode_string, masked_ops)
- register char *mode_string;
- unsigned masked_ops;
+mode_compile (const char *mode_string, unsigned int masked_ops)
{
struct mode_change *head; /* First element of the linked list. */
struct mode_change *change; /* An element of the linked list. */
umask (umask_value); /* Restore the old value. */
head = NULL;
+#ifdef lint
+ change = NULL;
+#endif
--mode_string;
/* One loop iteration for each "ugoa...=+-rwxXstugo...[=+-rwxXstugo...]". */
return MODE_INVALID;
}
+/* Return a file mode change operation that sets permissions to match those
+ of REF_FILE. Return MODE_BAD_REFERENCE if REF_FILE can't be accessed. */
+
+struct mode_change *
+mode_create_from_ref (const char *ref_file)
+{
+ struct mode_change *change; /* the only change element */
+ struct stat ref_stats;
+
+ if (stat (ref_file, &ref_stats))
+ return MODE_BAD_REFERENCE;
+
+ change = talloc (struct mode_change);
+
+ if (change == NULL)
+ return MODE_MEMORY_EXHAUSTED;
+
+ change->op = '=';
+ change->flags = 0;
+ change->affected = 07777;
+ change->value = ref_stats.st_mode;
+ change->next = NULL;
+
+ return change;
+}
+
/* Return file mode OLDMODE, adjusted as indicated by the list of change
operations CHANGES. If OLDMODE is a directory, the type `X'
change affects it even if no execute bits were set in OLDMODE.
The returned value has the S_IFMT bits cleared. */
unsigned short
-mode_adjust (oldmode, changes)
- unsigned oldmode;
- register struct mode_change *changes;
+mode_adjust (unsigned int oldmode, const struct mode_change *changes)
{
unsigned short newmode; /* The adjusted mode and one operand. */
unsigned short value; /* The other operand. */
CHANGES. */
void
-mode_free (changes)
- register struct mode_change *changes;
+mode_free (register struct mode_change *changes)
{
register struct mode_change *next;
changes = next;
}
}
-
-/* Return a positive integer containing the value of the ASCII
- octal number S. If S is not an octal number, return -1. */
-
-static int
-oatoi (s)
- char *s;
-{
- register int i;
-
- if (*s == 0)
- return -1;
- for (i = 0; isodigit (*s); ++s)
- i = i * 8 + *s - '0';
- if (*s)
- return -1;
- return i;
-}