-ssize_t mutt_gecos_name(char *dst, ssize_t n, struct passwd *pw, rx_t *rx);
+/* flags for _mutt_system() */
+#define M_DETACH_PROCESS 1 /* detach subprocess from group */
+
+#define mutt_system(x) _mutt_system(x,0)
+int _mutt_system (const char *, int);
+
+
+pid_t mutt_create_filter (const char *, FILE **, FILE **, FILE **);
+pid_t mutt_create_filter_fd (const char *, FILE **, FILE **, FILE **, int,
+ int, int);
+int mutt_wait_filter (pid_t);
+
+FILE *mutt_open_read (const char *, pid_t *);