Difference between revisions of "/private/etc/fstab"

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(Added that fstab was removed in iOS 14.)
 
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fstab controls the read/write access of the root and media partitions. A barebones jailbreak can be put in place simply by modifying this file to grant full read/write access to the [[/|root partition]] ([[/dev/disk0s1s1]]). fstab was removed in iOS 14.
{{DISPLAYTITLE:/etc/fstab}}
 
fstab controls the read/write access of the root and media partitions. A barebones jailbreak can be put in place simply by modifying this file to grant full read/write access to the user.
 
   
==Modification==
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== File Contents ==
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Note the empty line. This is required for the file to be parsed correctly.
The original fstab file, before a jailbreak, looks something like this:
 
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=== Before [[jailbreak]] ===
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[[/dev/disk0s1s1]] / hfs ro 0 1
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[[/dev/disk0s1s2]] /private/var hfs,nosuid,nodev rw 0 2
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=== After jailbreak ===
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/dev/disk0s1s1 / hfs rw 0 1
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/dev/disk0s1s2 /private/var hfs,nosuid,nodev rw 0 2
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== Parents ==
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{{parent|private|etc}}
   
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[[Category:Ramdisk Patches]]
<code>
 
/dev/disk0s1 / hfs ro 0 1
 
 
/dev/disk0s2 /private/var hfs rw,nosuid,nodev 0 2
 
</code>
 
 
Notice /dev/disk0s2 has /private/var mounted as read/write. This directory is generally where music/photos/videos/etc are stored. This directory can easily be accessed (without FULL access) with a program like PhoneDisk or DiskAid. iTunes has full and complete access to this directory, for obvious reasons. This is proven with the [[afc]] service, which [[iTunes]] uses to transfer music/videos/etc.
 
 
==Jailbreak==
 
Now, in order to get at least a barebones jailbreak going, we need to change
 
 
<code>
 
/dev/disk0s1 / hfs ro 0 1
 
 
to
 
 
/dev/disk0s1 / hfs rw 0 1.
 
</code>
 
 
This is the root partition, which generally has about ~800MB storage. This is also where [[Cydia]] installs applications. Once we have full read/write access to this partition, we can use the afc2 service to actually use our full access over USB. Most modern jailbreak tools like [[limera1n]] and [[greenpois0n]] install the afc2 service automatically, mostly for their own sake.
 

Latest revision as of 18:29, 25 April 2021

fstab controls the read/write access of the root and media partitions. A barebones jailbreak can be put in place simply by modifying this file to grant full read/write access to the root partition (/dev/disk0s1s1). fstab was removed in iOS 14.

File Contents

Note the empty line. This is required for the file to be parsed correctly.

Before jailbreak

/dev/disk0s1s1 / hfs ro 0 1
/dev/disk0s1s2 /private/var hfs,nosuid,nodev rw 0 2

After jailbreak

/dev/disk0s1s1 / hfs rw 0 1
/dev/disk0s1s2 /private/var hfs,nosuid,nodev rw 0 2

Parents

(root)/private/etc