getpwpath
strlcpy(pwtmp, getpwpath(_MASTERPASSWD), sizeof(pwtmp));
rc = fileupdate(getpwpath(_PASSWD), 0644, pwbuf, pfx, l, mode);
rc = fileupdate(getpwpath(_MASTERPASSWD), 0600, pwbuf, pfx, l, mode);
args[i++] = getpwpath(_MASTERPASSWD);
char * getpwpath(char const * file);