--- /dev/null
+/*
+ * Copyright (c) 2012 Darren Tucker (dtucker at zip com au).
+ *
+ * Permission to use, copy, modify, and 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 THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR 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.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+
+#include <errno.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <string.h>
+
+#if !defined(HAVE_SETRESGID) || defined(BROKEN_SETRESGID)
+int
+setresgid(gid_t rgid, gid_t egid, gid_t sgid)
+{
+ int ret = 0;
+
+ if (rgid != sgid) {
+ errno = ENOSYS;
+ return -1;
+ }
+#if defined(HAVE_SETREGID) && !defined(BROKEN_SETREGID)
+ if (setregid(rgid, egid) < 0) {
+ ret = -1;
+ }
+#else
+ if (setegid(egid) < 0) {
+ ret = -1;
+ }
+ if (setgid(rgid) < 0) {
+ ret = -1;
+ }
+#endif
+ return ret;
+}
+#endif
+
+#if !defined(HAVE_SETRESUID) || defined(BROKEN_SETRESUID)
+int
+setresuid(uid_t ruid, uid_t euid, uid_t suid)
+{
+ int ret = 0;
+
+ if (ruid != suid) {
+ errno = ENOSYS;
+ return -1;
+ }
+#if defined(HAVE_SETREUID) && !defined(BROKEN_SETREUID)
+ if (setreuid(ruid, euid) < 0) {
+ ret = -1;
+ }
+#else
+
+# ifndef SETEUID_BREAKS_SETUID
+ if (seteuid(euid) < 0) {
+ ret = -1;
+ }
+# endif
+ if (setuid(ruid) < 0) {
+ ret = -1;
+ }
+#endif
+ return ret;
+}
+#endif
void setprogname(const char *progname);
#endif /* !HAVE_SETPROGNAME */
+#ifndef HAVE_SETRESGID
+int setresgid(gid_t, gid_t, gid_t);
+#endif
+#ifndef HAVE_SETRESUID
+int setresuid(uid_t, uid_t, uid_t);
+#endif
+
#endif /* _LIB_OPENBSD_H_ */