On 08/13/2018 02:10 PM, Florian Weimer wrote: > Can ut_user be exactly UT_NAMESIZE bytes long? Or is it necessary to > set aside a byte with the NUL terminator? > > I'm not sure what POSIX says about struct utmpx. It never says “string” > in the context of ut_user, so I don't think it clarifies this matter. Each of the char fields in utmp/utmpx can be completely filled with characters. (I.e., there may not be a terminating null byte.) As you note, POSIX does not say much here, but perhaps the fact that the term "string" is not mentioned is a clue. Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
