/* Open a local file to store the downloaded data */
int axel_open( axel_t *axel )
{
int i, fd;
long long int j;
if( axel->conf->verbose > 0 )
axel_message( axel, _("Opening output file %s"), axel->filename );
snprintf( buffer, MAX_STRING, "%s.st", axel->filename );
axel->outfd = -1;
/* Check whether server knows about RESTart and switch back to
single connection download if necessary */
if( !axel->conn[0].supported )
{
axel_message( axel, _("Server unsupported, "
"starting from scratch with one connection.") );
axel->conf->num_connections = 1;
axel->conn = realloc( axel->conn, sizeof( conn_t ) );
axel_divide( axel );
}
else if( ( fd = open( buffer, O_RDONLY ) ) != -1 )
{
read( fd, &axel->conf->num_connections, sizeof( axel->conf->num_connections ) );
axel->conn = realloc( axel->conn, sizeof( conn_t ) * axel->conf->num_connections );
memset( axel->conn + 1, 0, sizeof( conn_t ) * ( axel->conf->num_connections - 1 ) );
axel_divide( axel );
read( fd, &axel->bytes_done, sizeof( axel->bytes_done ) );
for( i = 0; i < axel->conf->num_connections; i ++ )
read( fd, &axel->conn[i].currentbyte, sizeof( axel->conn[i].currentbyte ) );
axel_message( axel, _("State file found: %lld bytes downloaded, %lld to go."),
axel->bytes_done, axel->size - axel->bytes_done );
close( fd );
if( ( axel->outfd = open( axel->filename, O_WRONLY, 0666 ) ) == -1 )
{
axel_message( axel, _("Error opening local file") );
return( 0 );
}
}
/* If outfd == -1 we have to start from scrath now */
if( axel->outfd == -1 )
{
axel_divide( axel );
if( ( axel->outfd = open( axel->filename, O_CREAT | O_WRONLY, 0666 ) ) == -1 )
{
axel_message( axel, _("Error opening local file") );
return( 0 );
}
/* And check whether the filesystem can handle seeks to
past-EOF areas.. Speeds things up. :) AFAIK this
should just not happen: */
if( lseek( axel->outfd, axel->size, SEEK_SET ) == -1 && axel->conf->num_connections > 1 )
{
/* But if the OS/fs does not allow to seek behind
EOF, we have to fill the file with zeroes before
starting. Slow.. */
axel_message( axel, _("Crappy filesystem/OS.. Working around. :-(") );
lseek( axel->outfd, 0, SEEK_SET );
memset( buffer, 0, axel->conf->buffer_size );
j = axel->size;
while( j > 0 )
{
write( axel->outfd, buffer, min( j, axel->conf->buffer_size ) );
j -= axel->conf->buffer_size;
}
}
}
return( 1 );
}
/* Open a local file to store the downloaded data */
int axel_open(axel_t *axel)
{
int i;
#if WIN32
HANDLE fd;
DWORD byte;
#else
int fd;
#endif
long long int j;
if (0 < axel->conf->verbose)
{
axel_message(axel, _("Opening output file %s"), axel->filename);
}
snprintf(buffer, MAX_STRING, "%s.st", axel->filename);
#if WIN32
axel->outfd = INVALID_HANDLE_VALUE;
#else
axel->outfd = -1;
#endif
/* Check whether server knows about RESTart and switch back to
single connection download if necessary */
if (!axel->conn[0].supported)
{
axel_message(axel, _("Server unsupported, "
"starting from scratch with one connection."));
axel->conf->num_connections = 1;
axel->conn = realloc(axel->conn, sizeof(conn_t));
axel_divide(axel);
}
#if WIN32
else if (INVALID_HANDLE_VALUE != (fd = CreateFile(buffer,
GENERIC_READ, FILE_SHARE_READ, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0)))
#else
else if ((fd = open(buffer, O_RDONLY)) != -1)
#endif
{
#if WIN32
ReadFile(fd, &axel->conf->num_connections, sizeof(axel->conf->num_connections), &byte, NULL);
#else
read(fd, &axel->conf->num_connections, sizeof(axel->conf->num_connections));
#endif
axel->conn = realloc(axel->conn, sizeof(conn_t) * axel->conf->num_connections);
memset(axel->conn + 1, 0, sizeof(conn_t) * (axel->conf->num_connections - 1));
axel_divide(axel);
#if WIN32
ReadFile(fd, &axel->bytes_done, sizeof(axel->bytes_done), &byte, NULL);
#else
read(fd, &axel->bytes_done, sizeof(axel->bytes_done));
#endif
for (i = 0; i < axel->conf->num_connections; i++)
{
#if WIN32
ReadFile(fd, &axel->conn[i].currentbyte, sizeof(axel->conn[i].currentbyte), &byte, NULL);
#else
read(fd, &axel->conn[i].currentbyte, sizeof(axel->conn[i].currentbyte));
#endif
}
axel_message(axel, _("State file found: %lld bytes downloaded, %lld to go."),
axel->bytes_done, axel->size - axel->bytes_done);
#if WIN32
CloseHandle(fd);
#else
close(fd);
#endif
#if WIN32
if (INVALID_HANDLE_VALUE == (axel->outfd = CreateFile(axel->filename,
GENERIC_WRITE, FILE_SHARE_READ, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0)))
#else
if ((axel->outfd = open(axel->filename, O_WRONLY, 0666)) == -1)
#endif
{
axel_message(axel, _("Error opening local file"));
return 0;
}
}
/* If outfd == -1 we have to start from scrath now */
#if WIN32
if (INVALID_HANDLE_VALUE == axel->outfd)
#else
if (axel->outfd == -1)
#endif
{
axel_divide(axel);
#if WIN32
if (INVALID_HANDLE_VALUE == (axel->outfd = CreateFile(axel->filename,
GENERIC_WRITE, FILE_SHARE_READ, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0)))
#else
if ((axel->outfd = open(axel->filename, O_CREAT | O_WRONLY, 0666)) == -1)
#endif
{
axel_message(axel, _("Error opening local file"));
return 0;
}
/* And check whether the filesystem can handle seeks to
past-EOF areas.. Speeds things up. :) AFAIK this
should just not happen: */
#if WIN32
if (INVALID_SET_FILE_POINTER == SetFilePointer(axel->outfd, axel->size, NULL, FILE_BEGIN)
&& 1 < axel->conf->num_connections)
#else
if (lseek(axel->outfd, axel->size, SEEK_SET) == -1 && axel->conf->num_connections > 1)
#endif
{
/* But if the OS/fs does not allow to seek behind
EOF, we have to fill the file with zeroes before
starting. Slow.. */
axel_message(axel, _("Crappy filesystem/OS.. Working around. :-("));
#if WIN32
SetFilePointer(axel->outfd, 0, NULL, FILE_BEGIN);
#else
lseek(axel->outfd, 0, SEEK_SET);
#endif
memset(buffer, 0, axel->conf->buffer_size);
j = axel->size;
while (0 < j)
{
#if WIN32
WriteFile(axel->outfd, buffer, min(j, axel->conf->buffer_size), &byte, NULL);
#else
write(axel->outfd, buffer, min(j, axel->conf->buffer_size));
#endif
j -= axel->conf->buffer_size;
}
}
}
return 1;
}