From: "SZEDER Gábor" <szeder.dev@gmail.com>
To: Danh Doan <congdanhqx@gmail.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH v3 2/6] ci/lib-docker: preserve required environment variables
Date: Fri, 3 Apr 2020 21:55:51 +0200 [thread overview]
Message-ID: <20200403195551.GB7859@szeder.dev> (raw)
In-Reply-To: <20200403100931.GA32101@danh.dev>
On Fri, Apr 03, 2020 at 05:09:31PM +0700, Danh Doan wrote:
> On 2020-04-03 10:22:54+0200, SZEDER Gábor <szeder.dev@gmail.com> wrote:
> > On Thu, Apr 02, 2020 at 08:04:01PM +0700, Đoàn Trần Công Danh wrote:
> > > We're using "su -m" to preserve environment variables in the shell run
> > > by "su". But, that options will be ignored while "-l" (aka "--login") is
> > > specified.
> >
> > This is not true. See any previous runs of the 32 bit Linux job,
> > which worked as expected, because none of these environment variables
> > were cleared.
>
> Different su have different behavior when combine "-m" and "-l"
>
> util-linux's su has this as far as 60541961f, (docs: improve grammar,
> wording and formatting of su man page, 2013-10-12)
>
> -m, -p, --preserve-environment
> Preserve the entire environment, i.e., it does not set HOME,
> SHELL, USER nor LOGNAME. This option is ignored if the option
> --login is specified.
>
> https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git/tree/login-utils/su.1#n120
>
> Ubuntu (our Linux32 builder), ships su by shadow-utils:
>
> Note that the default behavior for the environment is the following:
> The $HOME, $SHELL, $USER, $LOGNAME, $PATH,
> and $IFS environment variables are reset.
>
> If --login is not used, the environment is copied,
> except for the variables above.
>
> If --login is used, the $TERM, $COLORTERM, $DISPLAY, and
> $XAUTHORITY environment variables are copied if they were set.
>
> There're no mentions of other variables, I _think_ our Linux32 works
> by accident.
We do know which image we use, and we do know how its 'su' behaves. I
think relying on that is fine, and it's not just "works by accident".
> Alpine ships su from busybox, this su ignores "-m" if "-l" is set.
Then the commit message should specifically mention these behavior
differences between different 'su' variants.
next prev parent reply other threads:[~2020-04-03 19:55 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-26 7:35 [PATCH 0/3] add travis job for linux with musl libc Đoàn Trần Công Danh
2020-03-26 7:35 ` [PATCH 1/3] ci: libify logic for usage and checking CI_USER Đoàn Trần Công Danh
2020-03-26 7:35 ` [PATCH 2/3] ci: refactor docker runner script Đoàn Trần Công Danh
2020-03-26 16:06 ` Eric Sunshine
2020-03-28 17:53 ` SZEDER Gábor
2020-03-29 6:36 ` Danh Doan
2020-03-26 7:35 ` [PATCH 3/3] travis: build and test on Linux with musl libc and busybox Đoàn Trần Công Danh
2020-03-29 5:49 ` [PATCH 0/3] add travis job for linux with musl libc Junio C Hamano
2020-03-29 10:12 ` [PATCH v2 0/4] Travis + Azure jobs " Đoàn Trần Công Danh
2020-03-29 10:12 ` [PATCH v2 1/4] ci: libify logic for usage and checking CI_USER Đoàn Trần Công Danh
2020-03-29 10:12 ` [PATCH v2 2/4] ci: refactor docker runner script Đoàn Trần Công Danh
2020-04-01 21:51 ` SZEDER Gábor
2020-03-29 10:12 ` [PATCH v2 3/4] travis: build and test on Linux with musl libc and busybox Đoàn Trần Công Danh
2020-04-01 22:18 ` SZEDER Gábor
2020-04-02 1:42 ` Danh Doan
2020-04-07 14:53 ` Johannes Schindelin
2020-04-07 21:35 ` Junio C Hamano
2020-04-10 13:38 ` Johannes Schindelin
2020-03-29 10:12 ` [PATCH v2 4/4] t3402: use POSIX compliant regex(7) Đoàn Trần Công Danh
2020-03-29 16:23 ` [PATCH v2 0/4] Travis + Azure jobs for linux with musl libc Junio C Hamano
2020-04-02 13:03 ` [PATCH v3 0/6] " Đoàn Trần Công Danh
2020-04-02 13:04 ` [PATCH v3 1/6] ci: make MAKEFLAGS available inside the Docker container in the Linux32 job Đoàn Trần Công Danh
2020-04-02 13:04 ` [PATCH v3 2/6] ci/lib-docker: preserve required environment variables Đoàn Trần Công Danh
2020-04-03 8:22 ` SZEDER Gábor
2020-04-03 10:09 ` Danh Doan
2020-04-03 19:55 ` SZEDER Gábor [this message]
2020-04-02 13:04 ` [PATCH v3 3/6] ci/linux32: parameterise command to switch arch Đoàn Trần Công Danh
2020-04-02 13:04 ` [PATCH v3 4/6] ci: refactor docker runner script Đoàn Trần Công Danh
2020-04-02 13:04 ` [PATCH v3 5/6] ci/linux32: libify install-dependencies step Đoàn Trần Công Danh
2020-04-02 13:04 ` [PATCH v3 6/6] travis: build and test on Linux with musl libc and busybox Đoàn Trần Công Danh
2020-04-02 17:53 ` [PATCH v3 0/6] Travis + Azure jobs for linux with musl libc Junio C Hamano
2020-04-03 0:23 ` Danh Doan
2020-04-04 1:08 ` [PATCH v4 0/6] Travis " Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 1/6] ci: make MAKEFLAGS available inside the Docker container in the Linux32 job Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 2/6] ci/lib-docker: preserve required environment variables Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 3/6] ci/linux32: parameterise command to switch arch Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 4/6] ci: refactor docker runner script Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 5/6] ci/linux32: libify install-dependencies step Đoàn Trần Công Danh
2020-04-04 1:08 ` [PATCH v4 6/6] travis: build and test on Linux with musl libc and busybox Đoàn Trần Công Danh
2020-04-05 20:39 ` [PATCH v4 0/6] Travis jobs for linux with musl libc Junio C Hamano
2020-04-07 14:55 ` Johannes Schindelin
2020-04-07 19:25 ` Junio C Hamano
-- strict thread matches above, loose matches on Subject: below --
2020-03-09 20:55 [PATCH] rebase --merge: optionally skip upstreamed commits Jonathan Tan
2020-03-10 2:10 ` Taylor Blau
2020-03-10 15:51 ` Jonathan Tan
2020-03-10 12:17 ` Johannes Schindelin
2020-03-10 16:00 ` Jonathan Tan
2020-03-10 18:56 ` Elijah Newren
2020-03-10 22:56 ` Jonathan Tan
2020-03-12 18:04 ` Jonathan Tan
2020-03-12 22:40 ` Elijah Newren
2020-03-14 8:04 ` Elijah Newren
2020-03-17 3:03 ` Jonathan Tan
2020-03-18 17:30 ` [PATCH v2] " Jonathan Tan
2020-03-18 18:47 ` Junio C Hamano
2020-03-18 19:28 ` Jonathan Tan
2020-03-18 19:55 ` Junio C Hamano
2020-03-18 20:41 ` Elijah Newren
2020-03-18 23:39 ` Junio C Hamano
2020-03-19 0:17 ` Elijah Newren
2020-03-18 20:20 ` Junio C Hamano
2020-03-26 17:50 ` Jonathan Tan
2020-03-26 19:17 ` Elijah Newren
2020-03-26 19:27 ` Junio C Hamano
2020-03-30 4:06 ` [PATCH v3] " Jonathan Tan
2020-03-30 5:09 ` Junio C Hamano
2020-03-30 5:22 ` Danh Doan
2020-03-30 12:13 ` Derrick Stolee
2020-03-30 16:49 ` Junio C Hamano
2020-03-30 16:57 ` Jonathan Tan
2020-03-31 11:55 ` Derrick Stolee
2020-03-31 16:27 ` Elijah Newren
2020-03-31 18:34 ` Junio C Hamano
2020-03-31 18:43 ` Junio C Hamano
2020-04-10 22:27 ` Jonathan Tan
2020-04-11 0:06 ` Elijah Newren
2020-04-11 1:11 ` Jonathan Tan
2020-04-11 2:46 ` Elijah Newren
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