static int
my_read(int fd, void *buffer, unsigned size)
{
lock_acquire(&filesys_lock);
if(!address_valid(buffer)){
lock_release(&filesys_lock);
my_exit(-1);
}
if(fd == STDIN_FILENO){
unsigned i = 0;
uint8_t* local_buffer = (uint8_t *)buffer;
for(;i< size; i++)
local_buffer[i] = input_getc();
lock_release(&filesys_lock);
return size;
}
struct file * fp = get_file_by_fd(fd);
if(!fp){
lock_release(&filesys_lock);
return -1;
}
int byte = file_read(fp, buffer, size);
lock_release(&filesys_lock);
return byte;
}
static void read_file(t_server *serv, int s)
{
t_file *file;
char buf[512];
char ret[1024];
int fd;
int r;
if ((r = read(s, buf, 511)) > 0)
{
buf[r] = 0;
if ((file = get_file_by_fd(serv->files, s)) != NULL)
{
sprintf(ret, ".downloads/%s", file->name);
if ((fd = open(ret, \
O_CREAT | O_APPEND | O_RDWR, 0666)) != -1)
{
swrite(fd, buf);
close(fd);
}
}
}
else
{
close(s);
serv->fd_type[s] = FD_FREE;
}
}
static int
my_filesize(int fd)
{
lock_acquire(&filesys_lock);
struct file * fp = get_file_by_fd(fd);
if(fp == NULL){
lock_release(&filesys_lock);
return -1;
}
lock_release(&filesys_lock);
return file_length(fp);
}
static void
my_seek(int fd, unsigned position)
{
lock_acquire(&filesys_lock);
struct file *fp = get_file_by_fd(fd);
if(fp == NULL){
lock_release(&filesys_lock);
return;
}
file_seek(fp, position);
lock_release(&filesys_lock);
return;
}
static unsigned
my_tell(int fd)
{
lock_acquire(&filesys_lock);
struct file * fp = get_file_by_fd(fd);
if(fd == NULL){
lock_release(&filesys_lock);
return -1;
}
off_t off = file_tell(fp);
lock_release(&filesys_lock);
return off;
}
// khg : syscalls -------------------------------
static int
my_write (int fd, const void *buffer, unsigned length)
{
lock_acquire(&filesys_lock);
if(!address_valid(buffer)){
lock_release(&filesys_lock);
my_exit(-1);
}
if (fd == STDOUT_FILENO){/* stdout */
putbuf (buffer, length);
lock_release(&filesys_lock);
return length;
}
struct file *fp = get_file_by_fd(fd);
if(fp == NULL){
lock_release(&filesys_lock);
return -1;
}
char *temp = malloc(sizeof(char) * (length+1));
int i, check = 0, c;
c = file_read(fp, temp, length);
for(i=0; i < c ; ++i)
{
if(temp[i]!=((char *)buffer)[i])
check = 1;
}
if(check == 0) // same
{
lock_release(&filesys_lock);
return c;
}
else
file_seek(fp, file_tell(fp)-c);
int byte = file_write(fp, buffer, length);
lock_release(&filesys_lock);
return byte;
}
void file_read(t_server *serv, int s)
{
t_file *file;
struct sockaddr_in csin;
socklen_t len;
int cs;
len = sizeof(csin);
cs = xaccept(s, (struct sockaddr *)&csin, &len);
if ((file = get_file_by_fd(serv->files, s)) != NULL)
file->fd = cs;
serv->fd_type[cs] = FD_WFILE_READ;
serv->fct_read[cs] = read_file;
serv->fct_write[cs] = NULL;
close(s);
serv->fd_type[s] = FD_FREE;
}
static void write_file(t_server *serv, int s)
{
t_file *file;
char buf[512];
char ret[1024];
int fd;
int r;
if ((file = get_file_by_fd(serv->files, s)) != NULL)
{
sprintf(ret, ".downloads/%s", file->name);
if ((fd = open(ret, O_RDONLY)) != -1)
{
if ((r = read(fd, buf, 511)) > 0)
{
buf[r] = 0;
swrite(s, buf);
close(fd);
}
else
shutting_down(serv, file, ret, s);
}
}
}
