initramfs的init示例 - digwtx's Blog
initramfs的init示例
digwtx
posted @ 2009年7月22日 04:07
in 未分类
, 2450 阅读
#!/bin/sh
echo "Loading, please wait..."
export PATH="/bin:/sbin"
[ -d /dev ] || mkdir -m 0755 /dev
[ -d /root ] || mkdir --mode=0700 /root
[ -d /sys ] || mkdir /sys
[ -d /proc ] || mkdir /proc
[ -d /tmp ] || mkdir /tmp
# Mount /proc and /sys:
mount -n proc /proc -t proc
mount -n sysfs /sys -t sysfs
/sbin/udevd --daemon
/sbin/udevadm trigger
/sbin/udevadm settle
#下面的这串解析内核命令行参数的代码是从Ubuntu的initrd抄过来的
for x in $(cat /proc/cmdline); do
case $x in
init=*)
init=${x#init=}
;;
root=*)
ROOT=${x#root=}
case $ROOT in
LABEL=*)
ROOT="/dev/disk/by-label/${ROOT#LABEL=}"
;;
UUID=*)
ROOT="/dev/disk/by-uuid/${ROOT#UUID=}"
;;
/dev/nfs)
BOOT=nfs
;;
esac
;;
rootflags=*)
ROOTFLAGS="-o ${x#rootflags=}"
;;
rootfstype=*)
ROOTFSTYPE="${x#rootfstype=}"
;;
rootdelay=*)
ROOTDELAY="${x#rootdelay=}"
;;
resumedelay=*)
RESUMEDELAY="${x#resumedelay=}"
;;
loop=*)
LOOP="${x#loop=}"
;;
loopflags=*)
LOOPFLAGS="-o ${x#loopflags=}"
;;
loopfstype=*)
LOOPFSTYPE="${x#loopfstype=}"
;;
cryptopts=*)
cryptopts="${x#cryptopts=}"
;;
nfsroot=*)
NFSROOT="${x#nfsroot=}"
;;
netboot=*)
NETBOOT="${x#netboot=}"
;;
ip=*)
IPOPTS="${x#ip=}"
;;
boot=*)
BOOT=${x#boot=}
;;
resume=*)
RESUME="${x#resume=}"
;;
noresume)
NORESUME=y
;;
panic=*)
panic="${x#panic=}"
;;
quiet)
quiet=y
;;
ro)
readonly=y
;;
rw)
readonly=n
;;
debug)
debug=y
exec >/tmp/initramfs.debug 2>&1
set -x
;;
debug=*)
debug=y
set -x
;;
break=*)
break=${x#break=}
;;
break)
break=premount
;;
0|1|2|3|4|5|6)
RUNLEVEL=$x
;;
esac
done
for ((t=0;t<32;i++)) ;
do
echo "Mounting the ROOT DEVICE..."
mount -o ro $ROOT /mnt
mountpoint -q /mnt && break
sleep 4
done
killall udevd
umount /proc
umount /sys
exec switch_root /mnt /sbin/init $RUNLEVEL
/bin/sh
echo "Loading, please wait..."
export PATH="/bin:/sbin"
[ -d /dev ] || mkdir -m 0755 /dev
[ -d /root ] || mkdir --mode=0700 /root
[ -d /sys ] || mkdir /sys
[ -d /proc ] || mkdir /proc
[ -d /tmp ] || mkdir /tmp
# Mount /proc and /sys:
mount -n proc /proc -t proc
mount -n sysfs /sys -t sysfs
/sbin/udevd --daemon
/sbin/udevadm trigger
/sbin/udevadm settle
#下面的这串解析内核命令行参数的代码是从Ubuntu的initrd抄过来的
for x in $(cat /proc/cmdline); do
case $x in
init=*)
init=${x#init=}
;;
root=*)
ROOT=${x#root=}
case $ROOT in
LABEL=*)
ROOT="/dev/disk/by-label/${ROOT#LABEL=}"
;;
UUID=*)
ROOT="/dev/disk/by-uuid/${ROOT#UUID=}"
;;
/dev/nfs)
BOOT=nfs
;;
esac
;;
rootflags=*)
ROOTFLAGS="-o ${x#rootflags=}"
;;
rootfstype=*)
ROOTFSTYPE="${x#rootfstype=}"
;;
rootdelay=*)
ROOTDELAY="${x#rootdelay=}"
;;
resumedelay=*)
RESUMEDELAY="${x#resumedelay=}"
;;
loop=*)
LOOP="${x#loop=}"
;;
loopflags=*)
LOOPFLAGS="-o ${x#loopflags=}"
;;
loopfstype=*)
LOOPFSTYPE="${x#loopfstype=}"
;;
cryptopts=*)
cryptopts="${x#cryptopts=}"
;;
nfsroot=*)
NFSROOT="${x#nfsroot=}"
;;
netboot=*)
NETBOOT="${x#netboot=}"
;;
ip=*)
IPOPTS="${x#ip=}"
;;
boot=*)
BOOT=${x#boot=}
;;
resume=*)
RESUME="${x#resume=}"
;;
noresume)
NORESUME=y
;;
panic=*)
panic="${x#panic=}"
;;
quiet)
quiet=y
;;
ro)
readonly=y
;;
rw)
readonly=n
;;
debug)
debug=y
exec >/tmp/initramfs.debug 2>&1
set -x
;;
debug=*)
debug=y
set -x
;;
break=*)
break=${x#break=}
;;
break)
break=premount
;;
0|1|2|3|4|5|6)
RUNLEVEL=$x
;;
esac
done
for ((t=0;t<32;i++)) ;
do
echo "Mounting the ROOT DEVICE..."
mount -o ro $ROOT /mnt
mountpoint -q /mnt && break
sleep 4
done
killall udevd
umount /proc
umount /sys
exec switch_root /mnt /sbin/init $RUNLEVEL
/bin/sh
2019年2月18日 15:52
All the poses of the program and instruction are very well defined for the individuals. Yes, the visits of the www.assignmentgeek.com.au are shard and punctuated for the people. The exact use is defined for the mutual stance for the people in this ambit.
2019年6月06日 13:45
In this I want to tell you how to remove password in window 10. Click the link if you forget your password in window 10.
2022年8月25日 23:17
Penn Foster offers practical, affordable programs for high school, college, and career school. Your education is here. penn foster student login Learn about our programs today. If you are a current Penn Foster student and would like to access your course materials and take exams, click here to login. Penn Foster Student Login. It is so easy to find your way around the PennFoster website.
2022年9月11日 13:20
Each language learner will surely employ a unique system for memorizing word forms, retaining their meanings, and recalling how to use words. Depending on the context, each word will have a specific appropriate interpretation. Simple support techniques that can be used on internet-connected gadgets are being developed as technology advances. To make it simpler to meet the diverse needs of each user, the company's founder develops a variety of support solutions. Therefore, this is the reason <a href="https://wordsfromletters.co/">words from letters</a> exists.
2022年9月12日 15:25
I'll explain how to do it in this article for Windows 10. If you lose your Windows 10 password, click the link.
2022年9月12日 15:27
It is so easy to find your way around the PennFoster website. [URL=https://backroomsgame.io]backrooms game[/URL]
2022年9月12日 15:27
nice! [backrooms game](https://backroomsgame.io)
2022年9月27日 17:25
The island's scenic highlands and quiet villages give way to lively resort cities along its rocky coast, providing a wide variety of [url=https://driving-directions.co]driving directions[/url] experiences for visitors. Whether you come to the island to relax in the sun, see its stunning scenery, or experience the cuisine and culture, you will come away with unforgettable memories.
2022年10月05日 15:03
In this tutorial, I'll show you how to set up a VPN on Windows 10. Use this page if you've forgotten your Windows 10 password.
2022年11月18日 11:06
thanks, i was looking for this code
2022年12月01日 21:04
Great information
2022年12月05日 14:54
It's great exploration
2022年12月29日 16:40
If all bloggers wrote like you, the internet would be a better place.
2023年3月15日 15:01
y business is very happy we found this during my search for some thing concerning this
2023年4月04日 09:59
This is often seen with live distributions of Linux that run entirely on memory. A live distribution of Linux unmounts the disc and then loads it into memory, so trying out a new OS or repairing another doesn't hurt the installed system.
2023年6月21日 17:48
Here, I will explain how to delete a Windows 10 password. If you have Windows 10 and have forgotten your password, click here. <a href="https://basketball-stars.co/">basketball stars</a>
2023年7月12日 17:01
This is common in memory-only Linux distributions, known as "live" versions. In order to avoid damaging the existing operating system, a live distribution of Linux first unmounts the disc and then loads it into memory.
2023年7月26日 17:28
Fans of racing video games shouldn't miss this
2023年11月08日 23:09
It was a really helpful and very informative blog. It really helps me a lot but if you want to also learn something new and interesting.
2024年4月11日 11:05
You’ve done such an amazing job. I really love your article.
2024年4月25日 17:12
What is the next part to write about?
2024年7月04日 19:37
Cool you make, the data is truly salubrious further surprising, I'll give you an alliance point with my scene. youibot autonomous mobile robots amr amr robot
2024年8月15日 17:15
I am quite impressed by the material that you give, and as a result of that information, I have gained a great deal of knowledge that is both intriguing and valuable.
2024年8月21日 11:41
The provided init script outlines the initialization process of an initramfs, detailing various mounting procedures and kernel parameter handling. This complex setup is crucial for booting Linux systems. If you find coding intriguing, try the Slope Game to sharpen your reflexes while having fun! Mastering both coding and games can enhance your problem-solving skills.
2024年8月24日 10:33
Initramfs' init示例 is an interesting example of how the Linux boot system manages the basic steps of booting. It's like how characters in the game Fnaf prepare for the arrival of important events in the game – step by step, carefully and precisely to ensure everything runs smoothly.
2024年10月04日 14:54
I have been playing Geometry Dash for hours without getting bored!
2024年10月07日 16:03
Can you elaborate on this point in more detail? geometry dash meltdown
2024年12月16日 11:56
The text “initramfs的init示例” refers to examples of the init process in initramfs, a critical component for booting Linux systems. Just like mastering levels in Geometry Dash requires precision and strategy, understanding init and its configurations demands attention to detail. Both involve navigating challenges to reach successful outcomes.
2025年3月24日 10:58
Whether you're a horror game fan or a music enthusiast, Sprunki Retake delivers an immersive experience where creativity and mystery blend seamlessly.
2025年3月26日 02:38
Hello! I just would want to supply a huge thumbs up for your great info you may have here on this post. I will be coming back to your blog post for more soon. 바카라 사이트
2025年3月27日 08:37
Acknowledging your kind words! I'm glad you found the information helpful and appreciate your positive feedback. Looking forward to your return visits for more content. Perhaps you'd enjoy checking out the casual simulation fun of the Monkey Mart game?