Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
200 lines
7.5 KiB
Bash
200 lines
7.5 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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#######################################
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# Wrapper to write '/etc/fstab' entries.
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# Globals:
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# TARGET
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# Arguments:
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# 1: UUID or /dev/mapper
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# 2: Mount Path
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# 3: Filesystem
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# 4: Mount Options
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# 5: Pass value, while Dump value is hardcoded always "0".
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# Returns:
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# 0: on success
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#######################################
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write_fstab() {
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declare write_maps="$1" write_path="$2" write_type="$3" write_opts="$4" write_pass="$5"
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if [[ "${write_maps}" == /dev/mapper/* ]]; then
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printf "%-43s%-28s%-18s%-100s0 %s\n" "${write_maps}" "${write_path}" "${write_type}" "${write_opts}" "${write_pass}" >> "${TARGET}/etc/fstab"
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do_log "info" "file_only" "4200() fstab entry generated: [${write_maps} ${write_path} ${write_type} ${write_opts} 0 ${write_pass}]."
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else
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printf "%-43s%-28s%-18s%-100s0 %s\n" "UUID=${write_maps}" "${write_path}" "${write_type}" "${write_opts}" "${write_pass}" >> "${TARGET}/etc/fstab"
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do_log "info" "file_only" "4200() fstab entry generated: [UUID=${write_maps} ${write_path} ${write_type} ${write_opts} 0 ${write_pass}]."
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fi
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return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f write_fstab
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#######################################
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# Generate the '/etc/fstab' target entries.
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# Globals:
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# ARY_PATHS_SORTED
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# HMP_EPHEMERAL_ENCLABEL
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# HMP_FSTAB_MOUNT_FTYPE
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# HMP_FSTAB_MOUNT_OPTS
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# HMP_PATH_FSUUID
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# TARGET
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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generate_fstab() {
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### Declare Arrays, HashMaps, and Variables.
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declare var_path="" var_dmapper="" var_fs_uuid="" var_fs_path="" var_fs_type="" var_fs_opts="" var_fs_pass=""
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### Generate '${TARGET}/etc/fstab' header.
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insert_header "${TARGET}/etc/fstab"
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insert_comments "${TARGET}/etc/fstab"
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cat << EOF >> "${TARGET}/etc/fstab"
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# Use 'blkid' to print the universally unique identifier for a device; this may be used with [UUID=] as a more robust way to
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# name devices that work even if disks are added and removed. See fstab(5).
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#
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# 'systemd' generates mount units based on this file. See systemd.mount(5). Please run 'systemctl daemon-reload' after making
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# changes here.
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#
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# <file system UUID> <mount point> <type> <options> <dump> <pass>
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EOF
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### Generate dynamic '${TARGET}/etc/fstab' entries.
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for var_path in "${ARY_PATHS_SORTED[@]}"; do
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[[ "${var_path}" == "/recovery" ]] && continue
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case "${var_path,,}" in
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swap) continue;;
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"/tmp")
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var_dmapper="${HMP_EPHEMERAL_ENCLABEL["${var_path}"]}"
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var_fs_uuid="/dev/mapper/${var_dmapper}"
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var_fs_path="${var_path}"
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var_fs_type="${HMP_FSTAB_MOUNT_FTYPE["${var_path}"]}"
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var_fs_opts="${HMP_FSTAB_MOUNT_OPTS["${var_path}"]}"
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var_fs_pass="0"
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;;
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*)
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var_fs_uuid="${HMP_PATH_FSUUID["${var_path}"]}"
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var_fs_path="${var_path}"
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var_fs_type="${HMP_FSTAB_MOUNT_FTYPE["${var_path}"]}"
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var_fs_opts="${HMP_FSTAB_MOUNT_OPTS["${var_path}"]}"
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case "${var_path,,}" in
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/) var_fs_pass="1" ;;
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/boot/efi) var_fs_pass="0" ;;
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*) var_fs_pass="2" ;;
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esac
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;;
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esac
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case "${var_fs_type,,}" in
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btrfs)
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write_fstab "${var_fs_uuid}" "${var_fs_path}" "${var_fs_type}" "${var_fs_opts}" "${var_fs_pass}"
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if [[ -v HMP_FSTAB_MOUNT_OPTS["${var_path}/.snapshots"] ]]; then
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var_fs_opts="${HMP_FSTAB_MOUNT_OPTS["${var_path}/.snapshots"]}"
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if [[ "${var_fs_path}" == "/" ]]; then
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write_fstab "${var_fs_uuid}" "/.snapshots" "${var_fs_type}" "${var_fs_opts}" "${var_fs_pass}"
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else
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write_fstab "${var_fs_uuid}" "${var_fs_path}/.snapshots" "${var_fs_type}" "${var_fs_opts}" "${var_fs_pass}"
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fi
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fi
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continue
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;;
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ext4)
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write_fstab "${var_fs_uuid}" "${var_fs_path}" "${var_fs_type}" "${var_fs_opts}" "${var_fs_pass}"
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continue
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;;
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fat32)
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write_fstab "${var_fs_uuid}" "${var_fs_path}" "vfat" "${var_fs_opts}" "${var_fs_pass}"
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continue
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;;
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*)
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do_log "info" "file_only" "4200() No valid FS found for: '${var_fs_path}'."
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esac
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done
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### Generate separate SWAP entry.
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var_dmapper="${HMP_EPHEMERAL_ENCLABEL["SWAP"]}"
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var_fs_uuid="/dev/mapper/${var_dmapper}"
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var_fs_path="none"
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var_fs_type="swap"
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var_fs_opts="${HMP_FSTAB_MOUNT_OPTS["SWAP"]}"
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var_fs_pass="0"
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write_fstab "${var_fs_uuid}" "${var_fs_path}" "${var_fs_type}" "${var_fs_opts}" "${var_fs_pass}"
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### Generate CD-ROM entry.
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mkdir -p "${TARGET}/media/cdrom0"
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cat << 'EOF' >> "${TARGET}/etc/fstab"
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/dev/sr0 /media/cdrom0 auto noauto,nofail,ro,user,x-systemd.automount,x-systemd.device-timeout=0 0 0
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#/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0
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EOF
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do_log "info" "file_only" "4200() fstab entry generated: '/dev/sr0 /media/cdrom0 udf,iso9660 user,noauto 0 0'."
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cat << 'EOF' >> "${TARGET}/etc/fstab"
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### Secure tmpfs mounts for a hardened system
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# Mount the 'proc' filesystem to provide process and kernel information.
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# Mount 'sysfs' to expose kernel device information to user space.
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# Mount the 'devpts' filesystem to enable pseudo-terminal support for user sessions.
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# Restrict '/dev/shm' to shared memory, limit size, prevent code execution.
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# System runtime directory in RAM. Do not set 'noexec' here for compatibility.
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proc /proc proc nodev,nosuid,noexec,hidepid=2 0 0
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sysfs /sys sysfs defaults 0 0
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devpts /dev/pts devpts gid=5,mode=620 0 0
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tmpfs /dev/shm tmpfs rw,nodev,noexec,nosuid,relatime,size=1G 0 0
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tmpfs /run tmpfs mode=0755,nodev,nosuid 0 0
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# vim: number et ts=2 sw=2 sts=2 ai tw=200 ft=sh
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EOF
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guard_dir && return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f generate_fstab
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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