mirror of
https://github.com/fsquillace/junest.git
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138 lines
4.5 KiB
Bash
138 lines
4.5 KiB
Bash
#!/usr/bin/env bash
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# shellcheck disable=SC1091
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#
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# This module contains all proot functionalities for JuNest.
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#
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# Dependencies:
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# - lib/utils/utils.sh
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# - lib/core/common.sh
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#
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# vim: ft=sh
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function _run_env_with_proot(){
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local backend_command="${1:-$PROOT}"
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local backend_args="$2"
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shift 2
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local args=()
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[[ "$1" != "" ]] && args=("-c" "$(insert_quotes_on_spaces "${@}")")
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# Resets PATH to avoid polluting with host related bin paths
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PATH='' PROOT="${backend_command}" JUNEST_ENV=1 proot_cmd "${backend_args}" "${DEFAULT_SH[@]}" "${args[@]}"
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}
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function _run_env_with_qemu(){
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local backend_command="$1"
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local backend_args="$2"
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shift 2
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source "${JUNEST_HOME}"/etc/junest/info
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if [ "$JUNEST_ARCH" != "$ARCH" ]
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then
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local qemu_bin="qemu-$JUNEST_ARCH-static-$ARCH"
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local qemu_symlink="/tmp/${qemu_bin}-$RANDOM"
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trap - QUIT EXIT ABRT KILL TERM INT
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# shellcheck disable=SC2064
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trap "[ -e ${qemu_symlink} ] && rm_cmd -f ${qemu_symlink}" EXIT QUIT ABRT TERM INT
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warn "Emulating $NAME via QEMU..."
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[[ -e ${qemu_symlink} ]] || \
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ln_cmd -s "${JUNEST_HOME}/bin/${qemu_bin}" "${qemu_symlink}"
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backend_args="-q ${qemu_symlink} $backend_args"
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fi
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_run_env_with_proot "${backend_command}" "$backend_args" "${@}"
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}
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#######################################
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# Run JuNest as fakeroot.
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#
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# Globals:
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# JUNEST_HOME (RO) : The JuNest home directory.
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# EUID (RO) : The user ID.
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# DEFAULT_SH (RO) : Contains the default command to run in JuNest.
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# Arguments:
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# backend_args ($1) : The arguments to pass to proot
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# no_copy_files ($2?) : If false it will copy some files in /etc
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# from host to JuNest environment.
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# cmd ($3-?) : The command to run inside JuNest environment.
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# Default command is defined by DEFAULT_SH variable.
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# Returns:
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# $ROOT_ACCESS_ERROR : If the user is the real root.
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# Output:
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# - : The command output.
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#######################################
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function run_env_as_proot_fakeroot(){
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(( EUID == 0 )) && \
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die_on_status "$ROOT_ACCESS_ERROR" "You cannot access with root privileges. Use --groot option instead."
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check_nested_env
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local backend_command="$1"
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local backend_args="$2"
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local no_copy_files="$3"
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shift 3
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if ! $no_copy_files
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then
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copy_common_files
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fi
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provide_common_bindings
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local bindings=${RESULT}
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unset RESULT
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# An alternative is via -S option:
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#_run_env_with_qemu "-S ${JUNEST_HOME} $1" "${@:2}"
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_run_env_with_qemu "$backend_command" "-0 ${bindings} -r ${JUNEST_HOME} $backend_args" "$@"
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}
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#######################################
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# Run JuNest as normal user.
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#
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# Globals:
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# JUNEST_HOME (RO) : The JuNest home directory.
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# EUID (RO) : The user ID.
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# DEFAULT_SH (RO) : Contains the default command to run in JuNest.
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# Arguments:
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# backend_args ($1) : The arguments to pass to proot
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# no_copy_files ($2?) : If false it will copy some files in /etc
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# from host to JuNest environment.
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# cmd ($3-?) : The command to run inside JuNest environment.
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# Default command is defined by DEFAULT_SH variable.
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# Returns:
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# $ROOT_ACCESS_ERROR : If the user is the real root.
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# Output:
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# - : The command output.
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#######################################
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function run_env_as_proot_user(){
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(( EUID == 0 )) && \
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die_on_status "$ROOT_ACCESS_ERROR" "You cannot access with root privileges. Use --groot option instead."
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check_nested_env
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local backend_command="$1"
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local backend_args="$2"
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local no_copy_files="$3"
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shift 3
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if ! $no_copy_files
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then
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# Files to bind are visible in `proot --help`.
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# This function excludes /etc/mtab file so that
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# it will not give conflicts with the related
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# symlink in the Arch Linux image.
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copy_common_files
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copy_file /etc/hosts.equiv
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copy_file /etc/netgroup
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copy_file /etc/networks
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# No need for localtime as it is setup during the image build
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#copy_file /etc/localtime
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copy_passwd_and_group
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fi
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provide_common_bindings
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local bindings=${RESULT}
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unset RESULT
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_run_env_with_qemu "$backend_command" "${bindings} -r ${JUNEST_HOME} $backend_args" "$@"
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}
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