procfile
char procfile[MAXPATHLEN];
sprintf(procfile, "/proc/%d/mem", pid);
fd = open(procfile, O_RDONLY, 0);
_kvm_err(kd, kd->program, "cannot open %s", procfile);
uva, procfile);
procfile);
_kvm_err(kd, kd->program, "EOF reading %s", procfile);
int procfile(const char *fn, struct sort_list *list, struct file_list *fl);
procfile("-", &list, &fl);
procfile(*argv, &list, &fl);