How to automatically edit a file (which requires hex editor) in ubuntu
I have android boot image which needs to be patched evertime I flash a kernel.
The patching includes adding 4096 bytes to the boot image using a hex editor (I used ghex), which is very tedious process because you have to manually add 4096 numbers to the file by hand. So, I want to make a script to automate the process.
It is not like simply editing files, it requires hex editor.
scripts programming
asked 2 hours ago
Saurav SinghSaurav Singh
565
add a comment |
I have android boot image which needs to be patched evertime I flash a kernel.
The patching includes adding 4096 bytes to the boot image using a hex editor (I used ghex), which is very tedious process because you have to manually add 4096 numbers to the file by hand. So, I want to make a script to automate the process.
It is not like simply editing files, it requires hex editor.
scripts programming
asked 2 hours ago
Saurav SinghSaurav Singh
565
add a comment |
I have android boot image which needs to be patched evertime I flash a kernel.
The patching includes adding 4096 bytes to the boot image using a hex editor (I used ghex), which is very tedious process because you have to manually add 4096 numbers to the file by hand. So, I want to make a script to automate the process.
It is not like simply editing files, it requires hex editor.
scripts programming
asked 2 hours ago
Saurav SinghSaurav Singh
565
I have android boot image which needs to be patched evertime I flash a kernel.
The patching includes adding 4096 bytes to the boot image using a hex editor (I used ghex), which is very tedious process because you have to manually add 4096 numbers to the file by hand. So, I want to make a script to automate the process.
It is not like simply editing files, it requires hex editor.
scripts programming
scripts programming
asked 2 hours ago
Saurav SinghSaurav Singh
565
asked 2 hours ago
Saurav SinghSaurav Singh
565
asked 2 hours ago
Saurav SinghSaurav Singh
565
asked 2 hours ago
Saurav SinghSaurav Singh
565
asked 2 hours ago
Saurav SinghSaurav Singh
565
565
add a comment |
add a comment |
1 Answer
1
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oldest
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Both head and tail can, through their --bytes option, do surgery on your file.
# assume: boot.img is the to-be-modified file, my4096 is your 4096 bytes,
# and you want to replace bytes 4097-8192 of the file. newboot.img is the result.
(
head --bytes=4096 boot.img ;
cat my4096;
tail --bytes=+8193 boot.img
) >newboot.img
or, you could use ed, or sed, or ...
answered 45 mins ago
waltinatorwaltinator
22.6k74169
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Both head and tail can, through their --bytes option, do surgery on your file.
# assume: boot.img is the to-be-modified file, my4096 is your 4096 bytes,
# and you want to replace bytes 4097-8192 of the file. newboot.img is the result.
(
head --bytes=4096 boot.img ;
cat my4096;
tail --bytes=+8193 boot.img
) >newboot.img
or, you could use ed, or sed, or ...
answered 45 mins ago
waltinatorwaltinator
22.6k74169
add a comment |
Both head and tail can, through their --bytes option, do surgery on your file.
# assume: boot.img is the to-be-modified file, my4096 is your 4096 bytes,
# and you want to replace bytes 4097-8192 of the file. newboot.img is the result.
(
head --bytes=4096 boot.img ;
cat my4096;
tail --bytes=+8193 boot.img
) >newboot.img
or, you could use ed, or sed, or ...
answered 45 mins ago
waltinatorwaltinator
22.6k74169
add a comment |
Both head and tail can, through their --bytes option, do surgery on your file.
# assume: boot.img is the to-be-modified file, my4096 is your 4096 bytes,
# and you want to replace bytes 4097-8192 of the file. newboot.img is the result.
(
head --bytes=4096 boot.img ;
cat my4096;
tail --bytes=+8193 boot.img
) >newboot.img
or, you could use ed, or sed, or ...
answered 45 mins ago
waltinatorwaltinator
22.6k74169
Both head and tail can, through their --bytes option, do surgery on your file.
# assume: boot.img is the to-be-modified file, my4096 is your 4096 bytes,
# and you want to replace bytes 4097-8192 of the file. newboot.img is the result.
(
head --bytes=4096 boot.img ;
cat my4096;
tail --bytes=+8193 boot.img
) >newboot.img
or, you could use ed, or sed, or ...
answered 45 mins ago
waltinatorwaltinator
22.6k74169
answered 45 mins ago
waltinatorwaltinator
22.6k74169
answered 45 mins ago
waltinatorwaltinator
22.6k74169
answered 45 mins ago
waltinatorwaltinator
22.6k74169
22.6k74169
add a comment |
add a comment |
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