File: hook-functions

package info (click to toggle)
initramfs-tools 0.133
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 504 kB
  • sloc: sh: 1,748; makefile: 18
file content (792 lines) | stat: -rw-r--r-- 20,163 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
# -*- shell-script -*-

catenate_cpiogz() {
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: catenate_cpiogz: arg1='${1}' does not exist." >&2
		return
	fi

	cat "${1}" >>"${__TMPCPIOGZ}"
}

prepend_earlyinitramfs() {
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: prepend_earlyinitramfs: arg1='${1}' does not exist." >&2
		return
	fi

	cat "${1}" >>"${__TMPEARLYCPIO}"
}

# force_load module [args...]
force_load()
{
	manual_add_modules "$1"
	echo "${@}" >>"${DESTDIR}/conf/modules"
}

# Takes a file containing a list of modules to be added as an
# argument, figures out dependancies, and adds them.
#
# Input file syntax:
#
#   # comment
#   modprobe_module_name [args ...]
#   [...]
#
add_modules_from_file()
{
	# Sanity check
	if [ ! -e "${1}" ]; then
		echo "W: add_modules_from_file: arg1='${1}' does not exist." >&2
		return
	fi

	grep '^[^#]' "${1}" | while read -r module args; do
		[ -n "$module" ] || continue
		force_load "${module}" "${args}"
	done
}

# Add dependent modules + eventual firmware
manual_add_modules()
{
	local prefix kmod options firmware

	if [ $# -eq 0 ]; then
		return
	fi

	# modprobe --ignore-install inhibits processing of 'install'
	# configuration lines, so that instead we will see 'insmod
	# module.ko' as we want.  However it also means that 'softdep'
	# configuration lines and embedded softdep information is not
	# processed.  So we run twice, with and without this option.
	# shellcheck disable=SC2034
	{ modprobe --all --set-version="${version?}" --ignore-install --quiet --show-depends "$@";
	  modprobe --all --set-version="${version}" --quiet --show-depends "$@"; } |
	while read -r prefix kmod options ; do
		if [ "${prefix}" != "insmod" ]; then
			continue
		fi

		copy_file module "${kmod}" || continue

		# Add required firmware
		for firmware in $(modinfo -k "${version}" -F firmware "${kmod}"); do
			if [ -e "${DESTDIR}/lib/firmware/${firmware}" ] \
			|| [ -e "${DESTDIR}/lib/firmware/${version}/${firmware}" ]; then
				continue
			fi

			# Only print warning for missing fw of loaded module
			# or forced loaded module
			if [ ! -e "/lib/firmware/${firmware}" ] \
			&& [ ! -e "/lib/firmware/${version}/${firmware}" ] ; then
				# Only warn about missing firmware if
				# /proc/modules exists
				if [ ! -e /proc/modules ] ; then
					continue
				fi

				kmod_modname="${kmod##*/}"
				kmod_modname="${kmod_modname%%.*}"
				if grep -q "^$kmod_modname\\>" /proc/modules "${CONFDIR}/modules"; then
					echo "W: Possible missing firmware /lib/firmware/${firmware} for module ${kmod_modname}" >&2
				fi
				continue
			fi

			if [ -e "/lib/firmware/${version}/${firmware}" ]; then
				copy_file firmware \
					"/lib/firmware/${version}/${firmware}"
			else
				copy_file firmware "/lib/firmware/${firmware}"
			fi
		done
	done
}

# $1 = file type (for logging)
# $2 = file to copy to initramfs
# $3 (optional) Name for the file on the initramfs
# Location of the image dir is assumed to be $DESTDIR
# If the target exists, we leave it and return 1.
# On any other error, we return >1.
copy_file() {
	local type src target link_target

	type="${1}"
	src="${2}"
	target="${3:-$2}"

	[ -f "${src}" ] || return 2

	# Canonicalise usr-merged target directories
	case "${target}" in
	/bin/* | /lib* | /sbin/*) target="/usr${target}" ;;
	esac

	if [ -d "${DESTDIR}/${target}" ]; then
		target="${target}/${src##*/}"
	fi

	# check if already copied
	[ -e "${DESTDIR}/${target}" ] && return 1

	mkdir -p "${DESTDIR}/${target%/*}"

	if [ -h "${src}" ]; then
		# We don't need to replicate a chain of links completely;
		# just link directly to the ultimate target
		link_target="$(readlink -f "${src}")" || return $(($? + 1))

		# Update source for the copy
		src="${link_target}"

		# Canonicalise usr-merged target directories
		case "${link_target}" in
		/bin/* | /lib* | /sbin/*) link_target="/usr${link_target}" ;;
		esac

		if [ "${link_target}" != "${target}" ]; then
			[ "${verbose?}" = "y" ] && echo "Adding ${type}-link ${src}"

			# Create a relative link so it always points
			# to the right place
			ln -rs "${DESTDIR}/${link_target}" "${DESTDIR}/${target}"
		fi

		# Copy the link target if it doesn't already exist
		target="${link_target}"
		[ -e "${DESTDIR}/${target}" ] && return 0
		mkdir -p "${DESTDIR}/${target%/*}"
	fi

	[ "${verbose}" = "y" ] && echo "Adding ${type} ${src}"

	cp -pP "${src}" "${DESTDIR}/${target}" || return $(($? + 1))
}

# $1 = executable to copy to initramfs, with library dependencies
# $2 (optional) Name for the file on the initramfs
# Location of the image dir is assumed to be $DESTDIR
# We never overwrite the target if it exists.
copy_exec() {
	local src target x nonoptlib ret

	src="${1}"
	target="${2:-$1}"

	copy_file binary "${src}" "${target}" || return $(($? - 1))

	# Copy the dependant libraries
	for x in $(ldd "${src}" 2>/dev/null | sed -e '
		/\//!d;
		/linux-gate/d;
		/=>/ {s/.*=>[[:blank:]]*\([^[:blank:]]*\).*/\1/};
		s/[[:blank:]]*\([^[:blank:]]*\) (.*)/\1/' 2>/dev/null); do

		# Try to use non-optimised libraries where possible.
		# We assume that all HWCAP libraries will be in tls,
		# sse2, vfp or neon.
		nonoptlib=$(echo "${x}" | sed -e 's#/lib/\([^/]*/\)\?\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#/lib/\1\3#')
		nonoptlib=$(echo "${nonoptlib}" | sed -e 's#-linux-gnu/\(tls\|i686\|sse2\|neon\|vfp\).*/\(lib.*\)#-linux-gnu/\2#')

		if [ -e "${nonoptlib}" ]; then
			x="${nonoptlib}"
		fi

		copy_file library "${x}" || {
			ret=$?
			[ ${ret} = 1 ] || return $((ret - 1))
		}
	done
}

# Copy entire subtrees to the initramfs
copy_modules_dir()
{
	local kmod first exclude
	local modules=
	local dir="$1"
	shift

	if ! [ -d "${MODULESDIR}/${dir}" ]; then
		return;
	fi
	if [ "${verbose}" = "y" ]; then
		echo "Copying module directory ${dir}"
		if [ $# -ge 1 ]; then
			echo "(excluding $*)"
		fi
	fi

	# Build up an expression for find
	first=true
	for exclude in "$@"; do
		# Change .ko suffix in exclusion to .ko*
		if [ "${exclude%.ko}" != "${exclude}" ]; then
			exclude="${exclude}*"
		fi
		$first && set --
		set -- "$@" -name "${exclude}" -prune -o
		first=false
	done

	# shellcheck disable=SC2044
	for kmod in $(find "${MODULESDIR}/${dir}" "$@" -name '*.ko*' -printf '%f\n'); do
		modules="$modules ${kmod%%.*}"
	done
	# shellcheck disable=SC2086
	manual_add_modules $modules
}

# walk /sys for relevant modules
sys_walk_mod_add()
{
	local driver_path module device_path modalias
	device_path="$1"

	while [ "${device_path}" != "/sys" ]; do
		# device modalias
		if [ -e "${device_path}/modalias" ]; then
			modalias=$(cat "${device_path}/modalias")
			if [ -n "${modalias}" ]; then
				manual_add_modules "${modalias}"
			fi
		fi

		# current driver module
		driver_path="$(readlink -f "${device_path}/driver/module")"
		if [ -e "$driver_path" ]; then
			module="$(basename "$(readlink -f "$driver_path")")"
			if [ -n "${module}" ]; then
				manual_add_modules "${module}"
			fi
		fi

		device_path="$(dirname "${device_path}")"
	done
}

block_dev_sys_walk_mod_add()
{
	local dev_sys_path disk_sys_path component

	# Resolve symlink so sys_walk_mod_add can walk up the hierarchy
	dev_sys_path="$(readlink -f "$1")"

	# Find whole disk from partition
	if grep -q "^DEVTYPE=partition$" "$dev_sys_path/uevent"; then
		disk_sys_path="$dev_sys_path/.."
	else
		disk_sys_path="$dev_sys_path"
	fi

	# Iterate over component of a layered device
	find "$disk_sys_path/slaves" -mindepth 1 -maxdepth 1 | while read -r component; do
		block_dev_sys_walk_mod_add "$component"
	done

	sys_walk_mod_add "${dev_sys_path}"
}

block_dev_mod_add()
{
	local dev_node dev_num dev_sys_path
	dev_node="$1"

	# Look up device number and convert to decimal as it appears in sysfs
	dev_num="$(stat -L -c %t:%T "$dev_node")"
	dev_num="$((0x${dev_num%:*})):$((0x${dev_num#*:}))"

	# Look up device in sysfs
	dev_sys_path="/sys/dev/block/$dev_num"
	if [ ! -d "$dev_sys_path" ]; then
		echo "mkinitramfs: for device ${dev_node} missing ${dev_sys_path}" >&2
		echo "mkinitramfs: workaround is MODULES=most" >&2
		echo "mkinitramfs: Error please report the bug" >&2
		exit 1
	fi

	block_dev_sys_walk_mod_add "$dev_sys_path"
}

# Copy all loaded or built-in modules matching the given pattern.
# Pattern mustn't include directory or '.ko' suffix but should use
# '[-_]' to allow for differences in naming between /sys/module and
# modules.builtin.
add_loaded_modules()
{
	local pattern="$1"
	local module builtin
	builtin="/lib/modules/$(uname -r)/modules.builtin"

	for module in /sys/module/$pattern; do
		if [ -d "$module" ]; then
			manual_add_modules "$(basename "$module")"
		fi
	done
	if [ -f "$builtin" ]; then
		while read -r module; do
			case "$module" in
			*/$pattern.ko)
				manual_add_modules "$(basename "$module" .ko)"
				;;
			esac
		done < "$builtin"
	fi
}

# find and only copy modules relevant to a mountpoint
dep_add_modules_mount()
{
	local dir dev_node FSTYPE

	dir="$1"

	# require mounted sysfs
	if [ ! -d /sys/devices/ ]; then
		echo "mkinitramfs: MODULES dep requires mounted sysfs on /sys" >&2
		exit 1
	fi

	# find out block device + fstype
	# shellcheck disable=SC2034
	eval "$(while read -r dev mp fs opts rest ; do \
		[ "$mp" = "$dir" ] && [ "$fs" != "rootfs" ] \
		&& printf "dev_node=%s\\nFSTYPE=%s" "$dev" "$fs"\
		&& break; done < /proc/mounts)"

	# Only the root mountpoint has to exist; do nothing if any other
	# directory is not a mountpoint.
	if [ "$dir" != / ] && [ -z "$dev_node" ]; then
		return
	fi

	# handle ubifs and return since ubifs is mounted on char devices
	# but most of the commands below only work with block devices.
	if [ "${FSTYPE}" = "ubifs" ]; then
		manual_add_modules "${FSTYPE}"
		return
	fi

	if [ "$dir" = / ] && [ "${dev_node}" = "/dev/root" ] ; then
		if [ -b "${dev_node}" ]; then
			# Match it to the canonical device name by UUID
			dev_node="/dev/disk/by-uuid/"$(blkid -o value -s UUID "${dev_node}") 2>/dev/null
		else
			# Does not exist in our namespace, so look at the
			# kernel command line
			dev_node=
			# shellcheck disable=SC2013
			for arg in $(cat /proc/cmdline); do
				case "$arg" in
				root=*)
					dev_node="${arg#root=}"
					if [ "${dev_node#/dev/}" = "$dev_node" ]; then
						dev_node="/dev/$dev_node"
					fi
					;;
				--)
					break
					;;
				*)
					;;
				esac
			done
		fi
	fi

	# recheck device
	if [ -z "$dev_node" ] || ! dev_node="$(readlink -f "${dev_node}")" \
		|| ! [ -b "$dev_node" ]; then
		echo "mkinitramfs: failed to determine device for $dir" >&2
		echo "mkinitramfs: workaround is MODULES=most, check:" >&2
		echo "grep -r MODULES ${CONFDIR}" >&2
		echo "" >&2
		echo "Error please report bug on initramfs-tools" >&2
		echo "Include the output of 'mount' and 'cat /proc/mounts'" >&2
		exit 1
	fi

	# do not trust mount, check superblock
	eval "$(/usr/lib/klibc/bin/fstype "${dev_node}")"

	# check that fstype fs recognition
	if [ "${FSTYPE}" = "unknown" ]; then
		FSTYPE=$(blkid -o value -s TYPE "${dev_node}")
		if [  -z "${FSTYPE}" ]; then
			echo "mkinitramfs: unknown fstype on device ${dev_node}" >&2
			echo "mkinitramfs: workaround is MODULES=most" >&2
			echo "Error please report bug on initramfs-tools" >&2
			exit 1
		fi
	fi

	# Add filesystem
	manual_add_modules "${FSTYPE}"

	block_dev_mod_add "$dev_node"
}

dep_add_modules()
{
	local device dev_node
	local modules=

	dep_add_modules_mount /
	dep_add_modules_mount /usr

	if [ -n "${RESUME}" ]; then
		dev_node="$(resolve_device "${RESUME}")"
		if [ -n "${dev_node}" ]; then
			block_dev_mod_add "${dev_node}"
		fi
	fi

	# sys walk some important device classes
	for class in gpio phy regulator rtc; do
		for device in "/sys/class/$class"/*; do
			device="$(readlink -f "$device")" \
				&& sys_walk_mod_add "$device"
		done
	done

	# clk, USB-PHY and pinctrl devices are outside the device model (!) so
	# match loaded modules by name
	add_loaded_modules 'clk[-_]*'
	add_loaded_modules 'phy[-_]*'
	add_loaded_modules 'pinctrl[-_]*'

	# Sys walk keyboards.  We identify keyboards as input devices
	# that can generate at least key events 1-31; udev has the
	# same heuristic.  Note that the format of the bitmap
	# properties depends on the word size of the process reading
	# the uevent file!
	for device in /sys/class/input/input*; do
		if grep -qs "^KEY=.*fffffff[ef]$" "${device}/uevent"; then
			sys_walk_mod_add "$(readlink -f "$device")"
		fi
	done

	# catch old-style IDE
	if [ -e /sys/bus/ide/devices/ ]; then
		modules="$modules ide-gd_mod ide-cd"
	fi

	if [ -e /sys/bus/scsi/devices/ ]; then
		modules="$modules sd_mod"
	fi

	if [ -e /sys/bus/mmc/devices/ ]; then
		modules="$modules mmc_block"
	fi

	if [ -e /sys/bus/virtio ] ; then
		modules="$modules virtio_pci virtio_mmio"
	fi

	if [ -e /sys/bus/i2o/devices/ ]; then
		force_load i2o_block
		force_load i2o_config
	fi

	if [ -e /sys/bus/ps3_system_bus/ ]; then
		modules="$modules ps3disk ps3rom ps3-gelic ps3_sys_manager"
	fi

	if [ -e /sys/bus/vio/ ]; then
		modules="$modules sunvnet sunvdc"
	fi

	# shellcheck disable=SC2086
	manual_add_modules $modules
}

# The modules "most" classes added per default to the initramfs
auto_add_modules()
{
	local arg
	local modules=

	if [ "$#" -eq 0 ] ; then
		set -- base net ide scsi block ata i2o dasd ieee1394 firewire mmc usb_storage
	fi

	for arg in "$@" ; do
		case "$arg" in
		base)
			modules="$modules btrfs ext2 ext3 ext4 ext4dev "
			modules="$modules isofs jfs reiserfs udf xfs"
			modules="$modules nfs nfsv2 nfsv3 nfsv4"
			modules="$modules af_packet atkbd i8042 psmouse"
			modules="$modules virtio_pci virtio_mmio"

			# Include most USB host and dual-role drivers
			copy_modules_dir kernel/drivers/usb/host \
				hwa-hc.ko sl811_cs.ko sl811-hcd.ko \
				u132-hcd.ko whci-hcd.ko
			copy_modules_dir kernel/drivers/usb/c67x00
			copy_modules_dir kernel/drivers/usb/chipidea
			copy_modules_dir kernel/drivers/usb/dwc2
			copy_modules_dir kernel/drivers/usb/dwc3
			copy_modules_dir kernel/drivers/usb/isp1760
			copy_modules_dir kernel/drivers/usb/musb
			copy_modules_dir kernel/drivers/usb/renesas_usbhs
			# and any extcon drivers for USB
			modules="$modules extcon-usb-gpio"
			# Add the axp20x_usb_power power supply driver,
			# required to initialize the USB host controllers
			# on a number of armhf systems
			modules="$modules axp20x_usb_power"

			# Include all HID drivers unless we're sure they
			# don't support keyboards.  hid-*ff covers various
			# game controllers with force feedback.
			copy_modules_dir kernel/drivers/hid \
				'hid-*ff.ko' hid-a4tech.ko hid-cypress.ko \
				hid-dr.ko hid-elecom.ko hid-gyration.ko \
				hid-icade.ko hid-kensington.ko hid-kye.ko \
				hid-lcpower.ko hid-magicmouse.ko \
				hid-multitouch.ko hid-ntrig.ko \
				hid-petalynx.ko hid-picolcd.ko hid-pl.ko \
				hid-ps3remote.ko hid-quanta.ko \
				'hid-roccat-ko*.ko' hid-roccat-pyra.ko \
				hid-saitek.ko hid-sensor-hub.ko hid-sony.ko \
				hid-speedlink.ko hid-tivo.ko hid-twinhan.ko \
				hid-uclogic.ko hid-wacom.ko hid-waltop.ko \
				hid-wiimote.ko hid-zydacron.ko

			# Any of these might be needed by other drivers
			copy_modules_dir kernel/drivers/bus
			copy_modules_dir kernel/drivers/clk
			copy_modules_dir kernel/drivers/gpio
			copy_modules_dir kernel/drivers/i2c/busses
			copy_modules_dir kernel/drivers/i2c/muxes
			copy_modules_dir kernel/drivers/mfd
			copy_modules_dir kernel/drivers/phy
			copy_modules_dir kernel/drivers/pinctrl
			copy_modules_dir kernel/drivers/regulator
			copy_modules_dir kernel/drivers/usb/phy

			# Needed for periodic fsck
			copy_modules_dir kernel/drivers/rtc
		;;
		net)
			copy_modules_dir kernel/drivers/net \
				appletalk arcnet bonding can dummy.ko \
				hamradio hippi ifb.ko irda macvlan.ko \
				macvtap.ko pcmcia sb1000.ko team tokenring \
				tun.ko usb veth.ko wan wimax wireless \
				xen-netback.ko
		;;
		ide)
			copy_modules_dir kernel/drivers/ide
		;;
		mmc)
			copy_modules_dir kernel/drivers/mmc
		;;
		scsi)
			copy_modules_dir kernel/drivers/scsi
			modules="$modules mptfc mptsas mptscsih mptspi zfcp"
		;;
		ata)
			copy_modules_dir kernel/drivers/ata
		;;
		block)
			copy_modules_dir kernel/drivers/block
			copy_modules_dir kernel/drivers/nvme
			modules="$modules vmd"
		;;
		ubi)
			modules="$modules deflate zlib lzo ubi ubifs"
		;;
		ieee1394)
			modules="$modules ohci1394 sbp2"
		;;
		firewire)
			modules="$modules firewire-ohci firewire-sbp2"
		;;
		i2o)
			modules="$modules i2o_block"
		;;
		dasd)
			modules="$modules dasd_diag_mod dasd_eckd_mod dasd_fba_mod"
		;;
		usb_storage)
			copy_modules_dir kernel/drivers/usb/storage
		;;
		esac
	done

	# shellcheck disable=SC2086
	manual_add_modules $modules
}

# 'depmod' only looks at symbol dependencies and the 'softdep' module
# information field; there is no way for modules to declare weaker
# dependencies (modules that *might* be needed at run-time) through
# module information, Until this is fixed, we need to handle those
# hidden dependencies.
hidden_dep_add_modules()
{
	# shellcheck disable=SC2046
	manual_add_modules $(
		{
			cat "${DESTDIR}/lib/modules/${version}/modules.builtin"
			find "${DESTDIR}/lib/modules/${version}/kernel" -name '*.ko*'
		} |
		while read -r module; do
			module="${module##*/}"
			module="${module%%.*}"
			case "$module" in
			libcrc32c)
				echo crc32c
				;;
			ubifs)
				echo deflate zlib lzo
				;;
			btrfs)
				echo crc32c
				;;
			mlx4_core)
				echo mlx4_ib
				;;
			mlx5_core)
				echo mlx5_ib
				;;
			i8042)
				echo psmouse
				;;
			nvme)
				echo vmd
				;;
			esac
		done
		)
}

# Find the source for a script file.  This is needed to work around
# temporary directories mounted with the noexec option.  The source
# will be on / or /usr which must be executable.
get_source()
{
	if [ -z "$scriptdir" ]; then
		echo "${initdir}/$1"
	elif [ -f "${CONFDIR}${scriptdir}/$1" ]; then
		echo "${CONFDIR}${scriptdir}/$1"
	else
		echo "/usr/share/initramfs-tools${scriptdir}/$1"
	fi
}

set_initlist()
{
	unset initlist
	for si_x in "${initdir}"/*; do
		# skip empty dirs without warning
		[ "${si_x}" = "${initdir}/*" ] && return

		# only allow variable name chars
		case ${si_x#${initdir}/} in
		*[![:alnum:]\._-]*)
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: not alphanumeric or '_' file" >&2
			continue
			;;
		esac

		# skip directories
		if [ -d "${si_x}" ]; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: a directory" >&2
			continue
		fi

		si_x="$(get_source "${si_x#${initdir}/}")"

		# skip non executable scripts
		if [ ! -x "${si_x}" ]; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: not executable" >&2
			continue
		fi

		# skip bad syntax
		if ! sh -n "${si_x}" ; then
			[ "${verbose}" = "y" ] \
			&& echo "$si_x ignored: bad syntax" >&2
			continue
		fi

		initlist="${initlist:-} ${si_x##*/}"
	done
}

get_prereq_pairs()
{
	set_initlist
	for gp_x in ${initlist:-}; do
		echo "${gp_x} ${gp_x}"
		gp_src="$(get_source "$gp_x")"
		prereqs=$("${gp_src}" prereqs)
		for prereq in ${prereqs}; do
			echo "${prereq} ${gp_x}"
		done
	done
}

# cache boot scripts order
cache_run_scripts()
{
	DESTDIR=${1}
	scriptdir=${2}
	initdir=${DESTDIR}${scriptdir}
	[ ! -d "${initdir}" ] && return

	true > "${initdir}/ORDER"
	runlist=$(get_prereq_pairs | tsort)
	for crs_x in ${runlist}; do
		[ -f "${initdir}/${crs_x}" ] || continue
		echo "${scriptdir}/${crs_x} \"\$@\"" >> "${initdir}/ORDER"
		echo "[ -e /conf/param.conf ] && . /conf/param.conf" >> "${initdir}/ORDER"
	done
}

call_scripts()
{
	set -e
	for cs_x in ${runlist}; do
		[ -f "${initdir}/${cs_x}" ] || continue
		# mkinitramfs verbose output
		if [ "${verbose}" = "y" ]; then
			echo "Calling hook ${cs_x}"
		fi
		"${initdir}/${cs_x}" && ec=$? || ec=$?
		# allow hooks to abort build:
		if [ "$ec" -ne 0 ]; then
			echo "E: ${initdir}/${cs_x} failed with return $ec." >&2
			# only errexit on mkinitramfs
			[ -n "${version}" ] && exit $ec
		fi
		# allow boot scripts to modify exported boot parameters
		if [ -e /conf/param.conf ]; then
			. /conf/param.conf
		fi
	done
	set +e
}

run_scripts()
{
	scriptdir=${2:-}
	initdir=${1}
	[ ! -d "${initdir}" ] && return

	runlist=$(get_prereq_pairs | tsort)
	call_scripts "$scriptdir"
}