+typedef void builtinserviceexec_fnt(const char *const *args);
+builtinserviceexec_fnt NONRETURNING bisexec_environment, bisexec_parameter;
+builtinserviceexec_fnt NONRETURNING bisexec_version, bisexec_help;
+builtinserviceexec_fnt NONRETURNING bisexec_toplevel, bisexec_override, bisexec_reset;
+builtinserviceexec_fnt NONRETURNING bisexec_execute, bisexec_shutdown;
+extern const char *const builtinservicehelpstrings[];
+
+void execservice(const int synchsocket[], int clientfd) NONRETURNING;
+void servicerequest(int sfd) NONRETURNING;
+int synchread(int fd, int ch);
+const char *defaultpath(void);
+