Perhaps because qmail is an anomaly, not Android? To remain relatively bug-free, a sizeable C project seems to require a small team and iron discipline. Unix MTAs are actually pretty good examples. With qmail, for a long time, it was just DJB. Postfix has also fared well, and (AFAIK) has a very small team. Both have been architected to religiously check error conditions and avoid the standard library for structure manipulation.
Android is probably more representative of large C (or C++) projects one may encounter in the wild.
Perhaps because qmail is an anomaly, not Android? To remain relatively bug-free, a sizeable C project seems to require a small team and iron discipline. Unix MTAs are actually pretty good examples. With qmail, for a long time, it was just DJB. Postfix has also fared well, and (AFAIK) has a very small team. Both have been architected to religiously check error conditions and avoid the standard library for structure manipulation.
Android is probably more representative of large C (or C++) projects one may encounter in the wild.