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FileSystem: Port most of the code over to using custodies.

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The current working directory is now stored as a custody. Likewise for a
process executable file. This unbreaks /proc/PID/fd which has not been
working since we made the filesystem bigger.

This still needs a bunch of work, for instance when renaming or removing
a file somewhere, we have to update the relevant custody links.
This commit is contained in:
Andreas Kling 2019-05-30 18:58:59 +02:00
parent 4cb87b1753
commit 393851418b
11 changed files with 280 additions and 220 deletions
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14
Kernel/FileSystem/Custody.cpp
View file

@ -1,4 +1,5 @@
#include <AK/HashTable.h>
#include <AK/StringBuilder.h>
#include <Kernel/FileSystem/Custody.h>
#include <Kernel/FileSystem/Inode.h>
#include <Kernel/Lock.h>
@ -25,3 +26,16 @@ Custody::~Custody()
LOCKER(all_custodies().lock());
all_custodies().resource().remove(this);
}
String Custody::absolute_path() const
{
Vector<const Custody*, 32> custody_chain;
for (auto* custody = this; custody; custody = custody->parent())
custody_chain.append(custody);
StringBuilder builder;
for (int i = custody_chain.size() - 2; i >= 0; --i) {
builder.append('/');
builder.append(custody_chain[i]->name().characters());
}
return builder.to_string();
}