1 files changed, 93 insertions, 0 deletions
diff --git a/lib/isc/unix/fsaccess.c b/lib/isc/unix/fsaccess.c
new file mode 100644
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--- /dev/null
+++ b/lib/isc/unix/fsaccess.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2004-2007  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 2000, 2001  Internet Software Consortium.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+ * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+ * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+ * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+ * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/* $Id: fsaccess.c,v 1.13 2007/06/19 23:47:18 tbox Exp $ */
+
+#include <config.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <errno.h>
+
+#include "errno2result.h"
+
+/*! \file
+ * \brief
+ * The OS-independent part of the API is in lib/isc.
+ */
+#include "../fsaccess.c"
+
+isc_result_t
+isc_fsaccess_set(const char *path, isc_fsaccess_t access) {
+	struct stat statb;
+	mode_t mode;
+	isc_boolean_t is_dir = ISC_FALSE;
+	isc_fsaccess_t bits;
+	isc_result_t result;
+
+	if (stat(path, &statb) != 0)
+		return (isc__errno2result(errno));
+
+	if ((statb.st_mode & S_IFDIR) != 0)
+		is_dir = ISC_TRUE;
+	else if ((statb.st_mode & S_IFREG) == 0)
+		return (ISC_R_INVALIDFILE);
+
+	result = check_bad_bits(access, is_dir);
+	if (result != ISC_R_SUCCESS)
+		return (result);
+
+	/*
+	 * Done with checking bad bits.  Set mode_t.
+	 */
+	mode = 0;
+
+#define SET_AND_CLEAR1(modebit) \
+	if ((access & bits) != 0) { \
+		mode |= modebit; \
+		access &= ~bits; \
+	}
+#define SET_AND_CLEAR(user, group, other) \
+	SET_AND_CLEAR1(user); \
+	bits <<= STEP; \
+	SET_AND_CLEAR1(group); \
+	bits <<= STEP; \
+	SET_AND_CLEAR1(other);
+
+	bits = ISC_FSACCESS_READ | ISC_FSACCESS_LISTDIRECTORY;
+
+	SET_AND_CLEAR(S_IRUSR, S_IRGRP, S_IROTH);
+
+	bits = ISC_FSACCESS_WRITE |
+	       ISC_FSACCESS_CREATECHILD |
+	       ISC_FSACCESS_DELETECHILD;
+
+	SET_AND_CLEAR(S_IWUSR, S_IWGRP, S_IWOTH);
+
+	bits = ISC_FSACCESS_EXECUTE |
+	       ISC_FSACCESS_ACCESSCHILD;
+
+	SET_AND_CLEAR(S_IXUSR, S_IXGRP, S_IXOTH);
+
+	INSIST(access == 0);
+
+	if (chmod(path, mode) < 0)
+		return (isc__errno2result(errno));
+
+	return (ISC_R_SUCCESS);
+}