mirror of
https://salsa.debian.org/kernel-team/initramfs-tools.git
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02dc65f9db
If the busybox-static package is installed, the modprobe implementation used will be the one from busybox, which behaves slightly differently. Specifically, the busybox implementation does not support `install` commands from modprobe.d conf files: https://git.busybox.net/busybox/tree/modutils/modprobe.c?h=1_31_stable#n279 Since mkinitramfs already ensures that /sbin/modprobe is copied into /sbin for the initrd, it is safe to fully-qualify the modprobe call and never invoke the busybox version.
117 lines
2.6 KiB
Bash
117 lines
2.6 KiB
Bash
#!/bin/sh
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PREREQ=""
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prereqs()
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{
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echo "$PREREQ"
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}
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case $1 in
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# get pre-requisites
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prereqs)
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prereqs
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exit 0
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;;
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esac
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# The options part of the kernel "video=" argument (i.e. everyting
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# after "video=<fbdriver>:") has very inconsistent rules.
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#
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# Generally the following applies:
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# 1) options are comma-separated
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# 2) options can be in either of these three forms:
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# <arg>=<value>, <arg>:<value>, <boolean-arg>.
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# 3) the "mode" or "mode_option" option (name depends on the framebuffer driver)
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# has the form <xres>x<yres>[M][R][-<bpp>][@<refresh>][i][m]
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# and may or may not start with "mode=" or "mode_option="
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# -> please adjust as necessary in the parse_video_opts() function
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#
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# When the options are used with modules, they need to be space-separated
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# and the following conversions are needed:
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# <arg>:<value> -> <arg>=<value>
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# <boolean-arg> -> <boolean-arg>=1
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# <modevalue> -> mode=<modevalue> or mode_option=<modevalue>
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parse_video_opts()
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{
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local OPTS="$1"
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local IFS=","
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# Must be a line like video=<fbdriver>:<opt1>,[opt2]...
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if [ "${OPTS}" = "${OPTS%%:*}" ]; then
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return
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fi
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OPTS="${OPTS#*:}"
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for opt in ${OPTS}; do
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# Already in the "<arg>=<value>" form
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if [ "${opt}" != "${opt#*=}" ]; then
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printf "%s" "$opt "
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# In the "<arg>:<value>" form
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elif [ "${opt}" != "${opt#*:}" ]; then
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printf "%s" "${opt%:*}=${opt#*:} "
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# Presumably a modevalue without the "mode=" prefix
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elif [ "${opt}" != "${opt#[0-9]*x[0-9]}" ]; then
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# Adjust: mode= option?
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printf "%s" "mode=$opt "
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# ... or mode_option= option?
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# printf "%s" "mode_option=$opt "
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# Presumably a boolean
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else
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printf "%s" "${opt}=1 "
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fi
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done
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}
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FB=""
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OPTS=""
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# shellcheck disable=SC2013
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for x in $(cat /proc/cmdline); do
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case ${x} in
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vga=*)
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FB="vesafb";
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OPTS="";
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;;
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video=*)
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FB=${x#*=}
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FB="${FB%%:*}"
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OPTS="$(parse_video_opts "${x}")"
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esac
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done
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# Module-specific workarounds
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case ${FB} in
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matroxfb)
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# Map command line name to module name
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FB=matroxfb_base
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;;
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intelfb|i810fb|i915)
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# Needs AGP driver loaded
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/sbin/modprobe intel-agp
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;;
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uvesafb)
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# v86d requires /dev/zero and dev/mem, but udev haven't been started yet
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[ -e /dev/zero ] || mknod -m 0666 /dev/zero c 1 5
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[ -e /dev/mem ] || mknod -m 0640 /dev/mem c 1 1
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;;
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*)
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;;
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esac
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if [ -n "${FB}" ]; then
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unset MODPROBE_OPTIONS
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/sbin/modprobe -q fbcon
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# shellcheck disable=SC2086
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/sbin/modprobe -q ${FB} ${OPTS}
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fi
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if [ -e /proc/fb ]; then
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# shellcheck disable=SC2034
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while read -r fbno desc; do
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if [ $((fbno < 32)) ]; then
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mknod -m 0640 "/dev/fb${fbno}" c 29 "${fbno}"
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fi
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done < /proc/fb
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else
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mknod -m 0640 /dev/fb0 c 29 0
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fi
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