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Print the contents of motd.txt on boot.

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This commit is contained in:
Andreas Kling 2018-10-17 12:07:39 +02:00
parent 705832f387
commit 39fa1eb2c2
Notes: sideshowbarker 2024-07-19 18:47:03 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/39fa1eb2c27
5 changed files with 28 additions and 8 deletions
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2
Kernel/Boot/boot.asm
View file

@ -42,7 +42,7 @@ boot:
inc word [cur_lba]
mov cx, word [cur_lba]
cmp cx, 300
cmp cx, 400
jz .sector_loop_end
mov bx, es

3
Kernel/Makefile
View file

@ -30,7 +30,8 @@ VFS_OBJS = \
../VirtualFileSystem/DiskBackedFileSystem.o \
../VirtualFileSystem/Ext2FileSystem.o \
../VirtualFileSystem/InodeIdentifier.o \
../VirtualFileSystem/VirtualFileSystem.o
../VirtualFileSystem/VirtualFileSystem.o \
../VirtualFileSystem/FileHandle.o
AK_OBJS = \
../AK/String.o \

13
Kernel/StdLib.cpp
View file

@ -1,6 +1,7 @@
#include "types.h"
#include "Assertions.h"
#include "kmalloc.h"
#include <AK/Types.h>
void memcpy(void *dest, const void *src, DWORD n)
{
@ -51,11 +52,13 @@ char* strdup(const char *str)
int memcmp(const void* v1, const void* v2, size_t n)
{
size_t m;
const char* s1 = (const char*)v1;
const char* s2 = (const char*)v2;
for (m = 0; m < n && *s1 == *s2; ++s1, ++s2);
return m == n ? 0 : -1;
auto* s1 = (const byte*)v1;
auto* s2 = (const byte*)v2;
while (n-- > 0) {
if (*s1++ != *s2++)
return s1[-1] < s2[-1] ? -1 : 1;
}
return 0;
}
extern "C" void __cxa_pure_virtual()

11
Kernel/init.cpp
View file

@ -20,6 +20,7 @@
#include <VirtualFileSystem/RandomDevice.h>
#include <VirtualFileSystem/Ext2FileSystem.h>
#include <VirtualFileSystem/VirtualFileSystem.h>
#include <VirtualFileSystem/FileHandle.h>
#include <AK/OwnPtr.h>
#if 0
@ -154,6 +155,16 @@ void init()
vfs->listDirectory("/");
{
auto motdFile = vfs->open("/motd.txt");
ASSERT(motdFile);
auto motdData = motdFile->readEntireFile();
for (unsigned i = 0; i < motdData.size(); ++i) {
kprintf("%c", motdData[i]);
}
}
// The idle task will spend its eternity here for now.
for (;;) {
asm("hlt");

7
VirtualFileSystem/FileHandle.cpp
View file

@ -5,7 +5,7 @@
#include "UnixTypes.h"
FileHandle::FileHandle(RetainPtr<VirtualFileSystem::Node>&& vnode)
: m_vnode(std::move(vnode))
: m_vnode(move(vnode))
{
}
@ -13,12 +13,14 @@ FileHandle::~FileHandle()
{
}
#ifndef SERENITY_KERNEL
bool additionWouldOverflow(Unix::off_t a, Unix::off_t b)
{
ASSERT(a > 0);
uint64_t ua = a;
return (ua + b) > maxFileOffset;
}
#endif
int FileHandle::stat(Unix::stat* buffer)
{
@ -67,14 +69,17 @@ Unix::off_t FileHandle::seek(Unix::off_t offset, int whence)
break;
case SEEK_CUR:
newOffset = m_currentOffset + offset;
#ifndef SERENITY_KERNEL
if (additionWouldOverflow(m_currentOffset, offset))
return -EOVERFLOW;
#endif
if (newOffset < 0)
return -EINVAL;
break;
case SEEK_END:
// FIXME: Implement!
notImplemented();
newOffset = 0;
break;
default:
return -EINVAL;