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Kernel/LibC: Implement chroot

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Bananymous
2025-08-11 02:29:49 +03:00
parent 695262624d
commit ef6ee78fd1
15 changed files with 117 additions and 80 deletions
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1
userspace/libraries/LibC/include/sys/syscall.h
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@@ -113,6 +113,7 @@ __BEGIN_DECLS
O(SYS_FUTEX, futex) \
O(SYS_GETGROUPS, getgroups) \
O(SYS_SETGROUPS, setgroups) \
O(SYS_CHROOT, chroot) \
enum Syscall
{

1
userspace/libraries/LibC/include/unistd.h
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@@ -596,6 +596,7 @@ int unlinkat(int fd, const char* path, int flag);
int usleep(useconds_t usec);
ssize_t write(int fildes, const void* buf, size_t nbyte);
int chroot(const char* path);
int getpagesize(void);
char* getpass(const char* prompt);

5
userspace/libraries/LibC/unistd.cpp
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@@ -626,6 +626,11 @@ int getopt(int argc, char* const argv[], const char* optstring)
return '?';
}
int chroot(const char* path)
{
return syscall(SYS_CHROOT, path);
}
int getpagesize(void)
{
return PAGE_SIZE;

3
userspace/libraries/LibFont/Font.cpp
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@@ -31,7 +31,8 @@ namespace LibFont
#if __is_kernel
{
auto inode = TRY(Kernel::VirtualFileSystem::get().file_from_absolute_path({ 0, 0, 0, 0 }, path, O_RDONLY)).inode;
// FIXME: This does not account for chroot
auto inode = TRY(Kernel::VirtualFileSystem::get().file_from_absolute_path(Kernel::VirtualFileSystem::get().root_inode(), { 0, 0, 0, 0 }, path, O_RDONLY)).inode;
TRY(file_data.resize(inode->size()));
TRY(inode->read(0, BAN::ByteSpan(file_data.span())));
}

3
userspace/libraries/LibInput/KeyboardLayout.cpp
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@@ -128,7 +128,8 @@ namespace LibInput
#if __is_kernel
{
auto file = TRY(Kernel::VirtualFileSystem::get().file_from_absolute_path({ 0, 0, 0, 0 }, path, 0));
// FIXME: This does not account for chroot
auto file = TRY(Kernel::VirtualFileSystem::get().file_from_absolute_path(Kernel::VirtualFileSystem::get().root_inode(), { 0, 0, 0, 0 }, path, 0));
TRY(file_data.resize(file.inode->size()));
TRY(file.inode->read(0, BAN::ByteSpan { reinterpret_cast<uint8_t*>(file_data.data()), file_data.size() }));
canonical_path = file.canonical_path;