2 * $Id: dsi_read.c,v 1.7 2009-10-25 06:13:11 didg Exp $
4 * Copyright (c) 1997 Adrian Sun (asun@zoology.washington.edu)
5 * All rights reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
16 #endif /* HAVE_UNISTD_H */
18 #include <sys/types.h>
20 #ifdef HAVE_SYS_FILIO_H
21 #include <sys/filio.h>
24 #include <atalk/dsi.h>
25 #include <atalk/util.h>
26 #include <atalk/logger.h>
28 /* streaming i/o for afp_read. this is all from the perspective of the
29 * client. it basically does the reverse of dsi_write. on first entry,
30 * it will send off the header plus whatever is in its command
31 * buffer. it returns the amount of stuff still to be read
32 * (constrained by the buffer size). */
33 ssize_t dsi_readinit(DSI *dsi, void *buf, const size_t buflen,
34 const size_t size, const int err)
36 LOG(log_maxdebug, logtype_dsi, "dsi_readinit: sending %zd bytes from buffer, total size: %zd",
39 dsi->flags |= DSI_NOREPLY; /* we will handle our own replies */
40 dsi->header.dsi_flags = DSIFL_REPLY;
41 dsi->header.dsi_len = htonl(size);
42 dsi->header.dsi_code = htonl(err);
45 if (dsi_stream_send(dsi, buf, buflen)) {
46 dsi->datasize = size - buflen;
47 LOG(log_maxdebug, logtype_dsi, "dsi_readinit: remaining data for sendfile: %zd", dsi->datasize);
48 return MIN(dsi->datasize, buflen);
51 return -1; /* error */
54 void dsi_readdone(DSI *dsi)
59 /* send off the data */
60 ssize_t dsi_read(DSI *dsi, void *buf, const size_t buflen)
64 len = dsi_stream_write(dsi, buf, buflen, 0);
68 return MIN(dsi->datasize, buflen);