char keep_arg[256];
struct child_process ip;
- s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
+ s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid());
if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
strcpy(keep_arg + s, "localhost");