/***************************************************************************
* Function: int recv_text(conn_data *conn)
*
* Description:
* Read data from the file descriptor associated with a connection and
* add it to the connection's input buffer. If the read returns -1 and either
* 1) errno isn't set to EWOULDBLOCK (BSD), or 2) the OS is Sys V, an error has
* occured and ERROR is returned. If errno _is_ EWOULDBLOCK (under BSD), or the
* return value was 0 (under Sys V), no data remains to be read from the
* socket. Under normal conditions return the number of bytes received.
**************************************************************************/
static int recv_text(conn_data *conn) {
int count, total = 0, result, length;
/*
* Keep reading data from the socket until there's nothing left to read.
*/
do {
length = strlen(conn->input_buf);
if ((count = read(conn->fd, conn->input_buf + length,
MAX_INPUT_LEN - length)) < 0) {
#ifdef BSD
if (errno == EWOULDBLOCK) return(total);
#endif
return(ERROR);
}
/*
* If anything was read in, call filter_input to move it to the input list.
*/
if (count != 0) {
total += count;
conn->input_buf[length + count] = '\0';
result = filter_input(conn);
if (result == ERROR) return(ERROR);
}
} while (length + count == MAX_INPUT_LEN);
return(total);
}
void filter_changesets (database_t * db,
changeset_t ** serial, changeset_t ** serial_end,
const char * filter_command)
{
// Set up a pipeline for running the subprocess and sending the data to it.
struct filter_context context = { db, serial, serial_end };
pipeline * pl = pipeline_new();
pipeline_command (
pl,
pipecmd_new_function ("filter source", filter_output, NULL, &context));
pipeline_command_argstr (pl, filter_command);
pipeline_want_out (pl, -1);
fflush (NULL); // We're forking...
pipeline_start (pl);
filter_input (db, pipeline_get_outfile (pl));
int res = pipeline_wait (pl);
if (res != 0)
fatal ("filter subprocess gave error: %i\n", res);
pipeline_free (pl);
}
