gctf2023/pwn/flipper/dist/common/source/fs/ramfs/RamFSFile.cpp

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2023-11-24 18:11:34 +00:00
#include "fs/ramfs/RamFSInode.h"
#include "fs/ramfs/RamFSFile.h"
#include "fs/ramfs/RamFSSuperblock.h"
#include "fs/Dentry.h"
#define ERROR_FRO "ERROR: The flag muss be READONLY for several opened files"
#define ERROR_FF "ERROR: The flag does not allow this operation"
#define ERROR_FNO "ERROR: The file is not open."
RamFSFile::RamFSFile(Inode* inode, Dentry* dentry, uint32 flag) :
File(inode, dentry, flag)
{
f_superblock_ = inode->getSuperblock();
offset_ = 0;
}
RamFSFile::~RamFSFile()
{
}
int32 RamFSFile::read(char *buffer, size_t count, l_off_t offset)
{
if (((flag_ & O_RDONLY) || (flag_ & O_RDWR)) && (f_inode_->getMode() & A_READABLE))
{
int32 read_bytes = f_inode_->readData(offset_ + offset, count, buffer);
offset_ += read_bytes;
return read_bytes;
}
else
{
// ERROR_FF
return -1;
}
}
int32 RamFSFile::write(const char *buffer, size_t count, l_off_t offset)
{
if (((flag_ & O_WRONLY) || (flag_ & O_RDWR)) && (f_inode_->getMode() & A_WRITABLE))
{
int32 written_bytes = f_inode_->writeData(offset_ + offset, count, buffer);
offset_ += written_bytes;
return written_bytes;
}
else
{
// ERROR_FF
return -1;
}
}
int32 RamFSFile::open(uint32 __attribute__((unused)) flag)
{
return 0;
}
int32 RamFSFile::close()
{
return 0;
}
int32 RamFSFile::flush()
{
return 0;
}