Build initramfs without any tools - Linux

There are many tools to build initramfs like dracut, update-initramfs, mkinitcpio, etc. but is there any way to create an initramfs without any tools by typing commands manually?

You may find some relevant information here:
initrd.rst « admin-guide « Documentation - kernel/git/torvalds/linux.git - Linux kernel source tree
git.kernel.org
ramfs-rootfs-initramfs.rst « filesystems « Documentation - kernel/git/torvalds/linux.git - Linux kernel source tree
git.kernel.org

Related

[ALL MUST READ] XDA-Developers and the GPL

GNU General Public License, version 2​
Kernel Developers
In order to be fully GPL compliant, your sources must:
Successfully build and produce a valid output file, which is the same format as provided in the binary
Contain all source code, interface definition files, scripts used to control compilation and installation of the executable (it is not required to include the actual compiler/toolchain, but sufficient information should be made available to obtain the SAME configuration, including compiler flags, as used to build the binary version as released)
Click to expand...
Click to collapse
ROM Developers
If your ROM uses custom boot.img the source must be provided.
If the kernel you are using was created by someone else, you must link to their source.
If your ROM contains a stock kernel, source must still be linked - ie; link to htc-dev kernel page.
Using a non GPL compliant kernel makes your ROM non compliant and subject to removal.
Click to expand...
Click to collapse
Here is an example of how your kernel sources should appear in your development thread's OP (original post):
My Awesome Kernel
Source: [LINK] - Linked directly to where your source is located, ie; github, bitbucket, htc-dev.
Compiler: Linaro GCC 4.8 [LINK] - Link not nessacery but is helpul.
Branch: Android 4.2.2
Kernel Version: 3.10
defconfig: vigor
Click to expand...
Click to collapse
Violating the GNU General Public License, version 2 is breaking the law. We will not go lightly on violators.
Want to learn more about XDA and the GPLv2 License? Check out the news article by our very own, pulser_g2:
XDA-Developers and the GPL​
Thank you for your attention.
wildstang83
Forum Moderator

[ALL MUST READ] XDA-Developers and the GPL

GNU General Public License, version 2​
Kernel Developers
In order to be fully GPL compliant, your sources must:
Successfully build and produce a valid output file, which is the same format as provided in the binary
Contain all source code, interface definition files, scripts used to control compilation and installation of the executable (it is not required to include the actual compiler/toolchain, but sufficient information should be made available to obtain the SAME configuration, including compiler flags, as used to build the binary version as released)
Click to expand...
Click to collapse
ROM Developers
If your ROM uses custom boot.img the source must be provided.
If the kernel you are using was created by someone else, you must link to their source.
If your ROM contains a stock kernel, source must still be linked - ie; link to htc-dev kernel page.
Using a non GPL compliant kernel makes your ROM non compliant and subject to removal.
Click to expand...
Click to collapse
Here is an example of how your kernel sources should appear in your development thread's OP (original post):
My Awesome Kernel
Source: [LINK] - Linked directly to where your source is located, ie; github, bitbucket, htc-dev.
Compiler: Linaro GCC 4.8 [LINK] - Link not nessacery but is helpul.
Branch: Android 4.2.2
Kernel Version: 3.10
defconfig: vigor
Click to expand...
Click to collapse
Violating the GNU General Public License, version 2 is breaking the law. We will not go lightly on violators.
Want to learn more about XDA and the GPLv2 License? Check out the news article by our very own, pulser_g2:
XDA-Developers and the GPL​
Thank you for your attention.
wildstang83
Forum Moderator

[ALL MUST READ] XDA-Developers and the GPL

GNU General Public License, version 2​
Kernel Developers
In order to be fully GPL compliant, your sources must:
Successfully build and produce a valid output file, which is the same format as provided in the binary
Contain all source code, interface definition files, scripts used to control compilation and installation of the executable (it is not required to include the actual compiler/toolchain, but sufficient information should be made available to obtain the SAME configuration, including compiler flags, as used to build the binary version as released)
Click to expand...
Click to collapse
ROM Developers
If your ROM uses custom boot.img the source must be provided.
If the kernel you are using was created by someone else, you must link to their source.
If your ROM contains a stock kernel, source must still be linked - ie; link to htc-dev kernel page.
Using a non GPL compliant kernel makes your ROM non compliant and subject to removal.
Click to expand...
Click to collapse
Here is an example of how your kernel sources should appear in your development thread's OP (original post):
My Awesome Kernel
Source: [LINK] - Linked directly to where your source is located, ie; github, bitbucket, htc-dev.
Compiler: Linaro GCC 4.8 [LINK] - Link not nessacery but is helpul.
Branch: Android 4.2.2
Kernel Version: 3.10
defconfig: vigor
Click to expand...
Click to collapse
Violating the GNU General Public License, version 2 is breaking the law. We will not go lightly on violators.
Want to learn more about XDA and the GPLv2 License? Check out the news article by our very own, pulser_g2:
XDA-Developers and the GPL​
Thank you for your attention.
wildstang83
Forum Moderator

[ALL MUST READ] XDA-Developers and the GPL

GNU General Public License, version 2​
Kernel Developers
In order to be fully GPL compliant, your sources must:
Successfully build and produce a valid output file, which is the same format as provided in the binary
Contain all source code, interface definition files, scripts used to control compilation and installation of the executable (it is not required to include the actual compiler/toolchain, but sufficient information should be made available to obtain the SAME configuration, including compiler flags, as used to build the binary version as released)
Click to expand...
Click to collapse
ROM Developers
If your ROM uses custom boot.img the source must be provided.
If the kernel you are using was created by someone else, you must link to their source.
If your ROM contains a stock kernel, source must still be linked - ie; link to htc-dev kernel page.
Using a non GPL compliant kernel makes your ROM non compliant and subject to removal.
Click to expand...
Click to collapse
Here is an example of how your kernel sources should appear in your development thread's OP (original post):
My Awesome Kernel
Source: [LINK] - Linked directly to where your source is located, ie; github, bitbucket, htc-dev.
Compiler: Linaro GCC 4.8 [LINK] - Link not nessacery but is helpul.
Branch: Android 4.2.2
Kernel Version: 3.10
defconfig: vigor
Click to expand...
Click to collapse
Violating the GNU General Public License, version 2 is breaking the law. We will not go lightly on violators.
Want to learn more about XDA and the GPLv2 License? Check out the news article by our very own, pulser_g2:
XDA-Developers and the GPL​
Thank you for your attention.
wildstang83
Forum Moderator

[ALL MUST READ] XDA-Developers and the GPL

GNU General Public License, version 2​
Kernel Developers
In order to be fully GPL compliant, your sources must:
Successfully build and produce a valid output file, which is the same format as provided in the binary
Contain all source code, interface definition files, scripts used to control compilation and installation of the executable (it is not required to include the actual compiler/toolchain, but sufficient information should be made available to obtain the SAME configuration, including compiler flags, as used to build the binary version as released)
Click to expand...
Click to collapse
ROM Developers
If your ROM uses custom boot.img the source must be provided.
If the kernel you are using was created by someone else, you must link to their source.
If your ROM contains a stock kernel, source must still be linked - ie; link to htc-dev kernel page.
Using a non GPL compliant kernel makes your ROM non compliant and subject to removal.
Click to expand...
Click to collapse
Here is an example of how your kernel sources should appear in your development thread's OP (original post):
My Awesome Kernel
Source: [LINK] - Linked directly to where your source is located, ie; github, bitbucket, htc-dev.
Compiler: Linaro GCC 4.8 [LINK] - Link not nessacery but is helpul.
Branch: Android 4.2.2
Kernel Version: 3.10
defconfig: vigor
Click to expand...
Click to collapse
Violating the GNU General Public License, version 2 is breaking the law. We will not go lightly on violators.
Want to learn more about XDA and the GPLv2 License? Check out the news article by our very own, pulser_g2:
XDA-Developers and the GPL​
Thank you for your attention.
wildstang83
Forum Moderator

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