mirror of https://github.com/thesofproject/sof.git
71 lines
2.1 KiB
Bash
Executable File
71 lines
2.1 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: BSD-3-Clause
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# Copyright(c) 2022 Intel Corporation. All rights reserved.
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# This is a "brute force" solution to filesystem permission issues:
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#
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# If the current user does not own the current directory then this
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# wrapper script switches to the user who does own the current directory
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# before running the given command.
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# If no user owns the current directory, a user who does gets created
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# first!
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# The main use case is to run this first thing inside a container to
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# solve file ownership mismatches.
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# `docker run --user=$(id -un) ...` achieves something very similar
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# without any code except the resulting user many not exist inside the
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# container. Some commands may not like that.
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#
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# To understand more about the Docker problem solved here take a look at
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# https://stackoverflow.com/questions/35291520/docker-and-userns-remap-how-to-manage-volume-permissions-to-share-data-betwee
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# and many other similar questions.
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# TODO: replace sudo with gosu?
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set -e
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set -x
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main()
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{
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cwd_uid="$(stat --printf='%u' .)"
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local current_uid; current_uid="$(id -u)"
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if test "$current_uid" = "$cwd_uid"; then
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exec "$@"
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else
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exec_as_cwd_uid "$@"
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fi
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}
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exec_as_cwd_uid()
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{
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# If missing, add new user owning the current directory
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local cwd_user; cwd_user="$(id "$cwd_uid")" || {
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cwd_user='cwd_user'
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local cwd_guid; cwd_guid="$(stat --printf='%g' .)"
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getent group "$cwd_guid" ||
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sudo groupadd -g "$cwd_guid" 'cwd_group'
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sudo useradd -m -u "$cwd_uid" -g "$cwd_guid" "$cwd_user"
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local current_user; current_user="$(id -un)"
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# Copy sudo permissions just in case the build needs it
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sudo sed -e "s/$current_user/$cwd_user/" /etc/sudoers.d/"$current_user" |
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sudo tee -a /etc/sudoers.d/"$cwd_user"
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sudo chmod --reference=/etc/sudoers.d/"$current_user" \
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/etc/sudoers.d/"$cwd_user"
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}
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# Double sudo to work around some funny restriction in
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# zephyr-build:/etc/sudoers: 'user' can do anything but... only as
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# root.
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sudo sudo -u "$cwd_user" REAL_CC="$REAL_CC" "$@"
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exit "$?"
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}
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main "$@"
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