Allow dropping privs on platforms without setresuid()

main.c

@@ -20,7 +20,7 @@
 #include "opts.h"
 #include "utils.h"
 
-/* lenght of "gemini://" */
+/* length of "gemini://" */
 #define GEMINI_PART	 9
 
 /*
@@ -121,12 +121,21 @@ drop_privileges(const char *user, const char *path)
 		chrooted = 1;
 		echdir("/");
 		/* drop privileges */
+#if defined (__OpenBSD__) || defined(__FreeBSD__)
 		if (setgroups(1, &pw->pw_gid) ||
 		    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
 		    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) {
 			errlog("dropping privileges to user %s (uid=%i) failed",
 			       user, pw->pw_uid);
 		}
+#else
+		if (setgroups(1, &pw->pw_gid) ||
+		    setgid(pw->pw_gid) ||
+		    setuid(pw->pw_uid)) {
+			errlog("dropping privileges to user %s (uid=%i) failed",
+			       user, pw->pw_uid);
+		}
+#endif
 	}
 #ifdef __OpenBSD__
 	/*