Date: Fri, 24 Nov 2006 06:12:11 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: marc.loerner@hob.de Cc: freebsd-drivers@freebsd.org Subject: Re: Directory in /dev Message-ID: <20061124.061211.420518872.imp@bsdimp.com> In-Reply-To: <20061124.060004.-1540393187.imp@bsdimp.com> References: <200611241225.07481.marc.loerner@hob.de> <20061124.055337.-432838076.imp@bsdimp.com> <20061124.060004.-1540393187.imp@bsdimp.com>
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In message: <20061124.060004.-1540393187.imp@bsdimp.com>
"M. Warner Losh" <imp@bsdimp.com> writes:
: In message: <20061124.055337.-432838076.imp@bsdimp.com>
: "M. Warner Losh" <imp@bsdimp.com> writes:
: : In message: <200611241225.07481.marc.loerner@hob.de>
: : Marc L=F6rner <marc.loerner@hob.de> writes:
: : : Hello,
: : : is it possible to create/make a subdirectory under /dev,
: : : or is it generally forbidden to do that?
: : : =
: : : I found nothing by googling or reading the archives of the freebs=
d mailing =
: : : lists. I even found nothing by slightly looking into the kernel c=
ode.
: : : =
: : : Does anyone have some suggestions or pointers for me?
: : =
: : makedev in your driver with a slash:
: : =
: : make_dev(cdevsw, minor, uid, gid, perm, "fred/ford%d", unit);
: : =
: : or if you are creating a disk device, set the d_name similarly.
: =
: I should have added that creating the first device in a subdirectory
: automatically creates that subdirectory. Removing the last device
: automatically deletes that subdirectory. You can't create a
: subdirectory just because you want it there, however.
I just updated the make_dev man page:
struct cdev *
make_dev(struct cdevsw *cdevsw, int minor, uid_t uid, gid_t gid,
int perms, const char *fmt, ...);
...
gid. The name is the expansion of fmt and following arguments as
printf(9) would print it. The name determines its path under /dev=
or
other devfs(5) mount point and may contain slash `/' characters to=
denote
subdirectories. The permissions of the file specified in perms ar=
e
...
If there's a better wording, please advise.
Warner
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