On Mon, Jul 03, 2017 at 04:36:30PM +0200, Evilham wrote: > Hi there, > > Am 03/07/2017 um 16:08 schrieb dev: ... > > > > useradd 0day works on Devuan. adduser 0day does not. Which is correct? > > I had this discussion yesterday, so here are my 2 cents :-). > > It is quite inconsistent what a "valid username" is, apparently it has > gotten better. > > According to POSIX, a valid username may include: a-z, A-Z, 0-9, ., -, _ > Where "-" cannot appear at the beginning. There is no further > restriction on the other chars. > http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_435 > > So, useradd works because it's lower level, adduser does not, because it > comes from shadow and they have more restrictions on what a valid name > is. IMHO that's a bug in shadow. > https://github.com/shadow-maint/shadow/blob/master/libmisc/chkname.c#L52 > > It is not possible, for example to execute: adduser name.lastname, which > is a valid POSIX username (but useradd name.lastname works fine).
It's not clear to me whether this is a bug in the adduser that's been around for ages, or n a systemd replacement for it. -- hendrik _______________________________________________ Dng mailing list Dng@lists.dyne.org https://mailinglists.dyne.org/cgi-bin/mailman/listinfo/dng
