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To:	cygwin AT cygwin DOT com
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From:	Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Organization:	Systematic Software
Subject:	Re: No admin setup questions
Message-ID:	<74f0de28-a6a8-9cb0-81d6-25af806bae53@SystematicSw.ab.ca>
Date:	Tue, 23 Feb 2021 14:51:39 -0700
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This is a multi-part message in MIME format.
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On 2021-02-23 09:08, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via Cygwin wrot=
e:
> I just downloaded the freshest setup.exe from the website to update a v=
ery
> old installation on a work PC, and am running it with -B (no admin).
> First thing I noticed is that the front page of the website (Cygwin.com=
)=20
> tells me that the latest Cygwin is 3.1.6, but the setup is downloading
> 3.1.7-1.

Good catch - thanks - patch submitted.

> Also, I see a lot of messages in the cmd.exe "terminal" window, from wh=
ere=20
> setup was run:  it seems to be logging all actions, including that I wa=
s not=20
> allowed to open service controller, and missing some rights, what the
> download and install path are, which packages are being downloaded, ext=
racted
> and installing.
> I do not remember seeing any of those in a "more regular" use (without =
the=20
> -B, when I just click the icon with the program).

Your non-elevated non-admin USER may not have perms to create logs in any=
 of the=20
usual places /var/log/, /tmp/, ./, /

> Is that some sort of a debugging output left behind?  Just curios, if t=
hat's=20
> a debug version of the setup ended up on being offered for download
> inadvertently.
> Also, procmail fails to post-install (I don't need it, so I don't basic=
ally
> care).
> running: C:\cygwin64\bin\bash.exe --norc --noprofile "/etc/postinstall/=
procmail.sh"
> abnormal exit: exit code=3D1
Your non-elevated non-admin USER will not have perms to be able to chown =
to=20
SYSTEM, and may not have perms to create directories, install config file=
s, etc.=20
required to install services such as procmail which should normally be in=
stalled=20
or upgraded under an elevated admin USER.

$ head /etc/postinstall/procmail.sh.done
#!/bin/sh

function install_conf {
         if ! [ -s "/$1" ]; then
                 cp -p "/etc/defaults/$1" "/$1"
                 chown SYSTEM "/$1"
                 chmod -x "/$1"
         fi
}
function install_dir {
$ dash -n /etc/postinstall/procmail.sh.done
a/procmail.sh.done: 9: a/procmail.sh.done: Syntax error: "}" unexpected
$ checkbashisms -fnpx /etc/postinstall/procmail.sh.done
possible bashism in /etc/postinstall/procmail.sh.done line 3 ('function' =
is=20
useless):
function install_conf {
possible bashism in /etc/postinstall/procmail.sh.done line 10 ('function'=
 is=20
useless):
function install_dir {

Script /etc/postinstall/procmail.sh is non-POSIX, non-portable, will not =
run=20
under dash or another POSIX shell, only if sh is bash as installed by Cyg=
win or=20
something similar; to be safe, explicit standard binary paths should be=20
hardcoded and precautions taken, just in case a proper PATH is not yet se=
t, the=20
script is not run under native Cygwin, or not installed for all users und=
er an=20
elevated admin USER, similar to the attached patch.

The postinstall script would be better rewritten to take account of these=
=20
conditions and use the install utility designed to do all this instead of=
=20
duplicating it in functions.

--=20
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

This email may be disturbing to some readers as it contains
too much technical detail. Reader discretion is advised.
[Data in binary units and prefixes, physical quantities in SI.]

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