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Date: Sat, 9 Sep 2017 11:03:40 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: How to specify the user directory OUTSIDE of Cygwin (installation folder)?
Message-ID: <20170909090340.GC18477@calimero.vinschen.de>
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[top-posting fixed]

On Sep  9 10:31, J=C3=BCrgen Wagner wrote:
> On 09.09.2017 09:53, Marco Atzeri wrote:
> > On 09/09/2017 07:06, Ben Stover via cygwin wrote:
> >> By default the user folder of Cygwin (under Win7) is in a subdirectory
> >>
> >> <installation folder>\home\<username>
> >
> > from cygwin point of view "/home/<username>"
> >
> >> How can I put it into a separate directory OUTSIDE of Cygwin?
> >> [...]
> >> If possible I would like to specify my new home directory not as
> >> absolute but as relative path.
> >>
> >> I would prefer a customization somwhow in "Cygwin.bat" like:

We *have* extensive customization, see below.

> >>
> >> set cygwinhome=3D..\myhome
> >>
> >> Mind the double dots standing for "go up one level".
> >>
> >> How can I achieve this?
> >>
> >> Ben
> >>
> > mkpasswd -c >> /etc/passwd
> >
> > change the fifth field of "/etc/passwd"
> > from=C2=A0 "/home/<username>"
> > to "/cygdrive/d/tools/cygwin/myhome"
> >
> > close all cygwin process and rerun.

/etc/passwd should be the absolut last resort.  Preferredly the changes
are in /etc/nsswitch.conf and the user database, SAM or AD.  Here's the
howto:

  https://cygwin.com/cygwin-ug-net/ntsec.html#ntsec-mapping-passwdinfo

For instance, change /etc/nsswitch.conf to contain

  db_home: /your/desired/homedir/%U

> Hi,
> =C2=A0 of course, you could change something in /etc/passwd to define a n=
ew
> home directory. However, it is good to have the convention of home
> directories being under one root (at least for non-administrative
> accounts). Therefore, my preferred solution is to make a symbolic link.
>=20
> /home/USER =3D> /cygdrive/d/tools/...
>=20
> You can have symbolic links with relative paths as a destination,
> however, that would assume you still are in the directory universe of
> Cygwin. In this case, you are not. Therefore, you have to address this
> via /cygdrive/...
>=20
> Besides... what is the advantage of having a relative path here, anyway?
> If you install different flavours of Cygwin as siblings under a common
> root, the absolute path will be the same for all instances.

I'd suggest a mount point in /etc/fstab instead, e.g.

  C:/cygwin64/newhome /home ntfs binary 0 0

That has the additional advantage that the POSIX ACL handling is
under your control, rather than being the default noacl handling
of cygdrive paths.

Alternatively, see the /etc/nsswitch.conf customizations above.


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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