1 files changed, 70 insertions, 0 deletions
diff --git a/bin/rndc/unix/os.c b/bin/rndc/unix/os.c
new file mode 100644
index 0000000..ddf8259
--- /dev/null
+++ b/bin/rndc/unix/os.c
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
+ * Copyright (C) 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: os.c,v 1.10 2007/06/19 23:46:59 tbox Exp $ */
+
+/*! \file */
+
+#include <config.h>
+
+#include <rndc/os.h>
+
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <errno.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+int
+set_user(FILE *fd, const char *user) {
+	struct passwd *pw;
+
+	pw = getpwnam(user);
+	if (pw == NULL) {
+		errno = EINVAL;
+		return (-1);
+	}
+	return (fchown(fileno(fd), pw->pw_uid, -1));
+}
+
+FILE *
+safe_create(const char *filename) {
+	int fd;
+	FILE *f;
+        struct stat sb;
+	int flags = O_WRONLY;
+
+        if (stat(filename, &sb) == -1) {
+                if (errno != ENOENT)
+			return (NULL);
+		flags = O_WRONLY | O_CREAT | O_EXCL;
+        } else if ((sb.st_mode & S_IFREG) == 0) {
+		errno = EOPNOTSUPP;
+		return (NULL);
+	} else
+		flags = O_WRONLY | O_TRUNC;
+
+	fd = open(filename, flags, S_IRUSR | S_IWUSR);
+	if (fd == -1)
+		return (NULL);
+	f = fdopen(fd, "w");
+	if (f == NULL)
+		close(fd);
+	return (f);
+}