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Lots of hacking to make a very simple "ls" utility.

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I added a dead-simple malloc that only allows allocations < 4096 bytes.
It just forwards the request to mmap() every time.

I also added simplified versions of opendir() and readdir().
This commit is contained in:
Andreas Kling 2018-10-24 12:43:52 +02:00
parent 0c5bbac86e
commit bca4b71bfa
19 changed files with 277 additions and 67 deletions
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7
Kernel/ProcFileSystem.cpp
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@ -21,17 +21,18 @@ bool ProcFileSystem::initialize()
InterruptDisabler disabler;
auto tasks = Task::allTasks();
char* buffer;
auto stringImpl = StringImpl::createUninitialized(tasks.size() * 128, buffer);
auto stringImpl = StringImpl::createUninitialized(tasks.size() * 256, buffer);
memset(buffer, 0, stringImpl->length());
char* ptr = buffer;
ptr += ksprintf(ptr, "PID OWNER STATE NSCHED NAME\n");
ptr += ksprintf(ptr, "PID OWNER STATE NSCHED FDS NAME\n");
for (auto* task : tasks) {
ptr += ksprintf(ptr, "%w %w:%w %b %w %s\n",
ptr += ksprintf(ptr, "%w %w:%w %b %w %w %s\n",
task->pid(),
task->uid(),
task->gid(),
task->state(),
task->timesScheduled(),
task->fileHandleCount(),
task->name().characters());
}
ptr += ksprintf(ptr, "kmalloc: alloc: %u / free: %u\n", sum_alloc, sum_free);