int file_chunk(char *src_filename, char *chunk_filename, int chunk_algo)
{
int fd_src, fd_chunk;
chunk_file_header chunk_file_hdr;
int ret = 0, rwsize;
fd_src = open(src_filename, O_RDONLY);
if (fd_src == -1)
return -1;
fd_chunk = open(chunk_filename, O_WRONLY|O_CREAT|O_TRUNC, 0644);
if (fd_chunk == -1) {
ret = -1;
goto _FILE_CHUNK_EXIT;
}
/* pre-write chunk file header */
chunk_file_hdr.block_nr = 0;
rwsize = write(fd_chunk, &chunk_file_hdr, CHUNK_FILE_HEADER_SZ);
if (rwsize == -1 || rwsize != CHUNK_FILE_HEADER_SZ) {
ret = -1;
goto _FILE_CHUNK_EXIT;
}
/* file chunking according to chunk algorithms */
switch(chunk_algo) {
case CHUNK_FSP:
ret = file_chunk_fsp(fd_src, fd_chunk, &chunk_file_hdr);
break;
case CHUNK_CDC:
ret = file_chunk_cdc(fd_src, fd_chunk, &chunk_file_hdr);
break;
case CHUNK_SBC:
ret = file_chunk_sbc(fd_src, fd_chunk, &chunk_file_hdr);
break;
}
/* write back chunk file header */
if (ret == 0) {
if (lseek(fd_chunk, 0, SEEK_SET) == -1) {
ret = -1;
goto _FILE_CHUNK_EXIT;
}
chunk_file_hdr.block_sz = BLOCK_SZ;
rwsize = write(fd_chunk, &chunk_file_hdr, CHUNK_FILE_HEADER_SZ);
if (rwsize == -1 || rwsize != CHUNK_FILE_HEADER_SZ)
ret = -1;
}
_FILE_CHUNK_EXIT:
close(fd_src);
close(fd_chunk);
return ret;
}
int filename_chunk_cdc(const char *filename,
CDCFileDescriptor *file_descr,
SeafileCrypt *crypt,
gboolean write_data)
{
int fd_src = g_open (filename, O_RDONLY | O_BINARY, 0);
if (fd_src < 0)
return -1;
int ret = file_chunk_cdc (fd_src, file_descr, crypt, write_data);
close (fd_src);
return ret;
}
int filename_chunk_cdc(const char *filename,
CDCFileDescriptor *file_descr,
SeafileCrypt *crypt,
gboolean write_data)
{
int fd_src = seaf_util_open (filename, O_RDONLY | O_BINARY);
if (fd_src < 0) {
seaf_warning ("CDC: failed to open %s.\n", filename);
return -1;
}
int ret = file_chunk_cdc (fd_src, file_descr, crypt, write_data);
close (fd_src);
return ret;
}