src/lib/ostream-rawlog.c

/* Copyright (c) 2011-2018 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "iostream-rawlog-private.h"
#include "ostream-private.h"
#include "ostream-rawlog.h"

struct rawlog_ostream {
    struct ostream_private ostream;
    struct rawlog_iostream riostream;
};

static void o_stream_rawlog_close(struct iostream_private *stream,
                  bool close_parent)
{
    struct rawlog_ostream *rstream = (struct rawlog_ostream *)stream;

    iostream_rawlog_close(&rstream->riostream);
    if (close_parent)
        o_stream_close(rstream->ostream.parent);
}

static ssize_t
o_stream_rawlog_sendv(struct ostream_private *stream,
              const struct const_iovec *iov, unsigned int iov_count)
{
    struct rawlog_ostream *rstream = (struct rawlog_ostream *)stream;
    unsigned int i;
    ssize_t ret, bytes;

    if ((ret = o_stream_sendv(stream->parent, iov, iov_count)) < 0) {
        o_stream_copy_error_from_parent(stream);
        return -1;
    }
    bytes = ret;
    for (i = 0; i < iov_count && bytes > 0; i++) {
        if (iov[i].iov_len < (size_t)bytes) {
            iostream_rawlog_write(&rstream->riostream,
                          iov[i].iov_base, iov[i].iov_len);
            bytes -= iov[i].iov_len;
        } else {
            iostream_rawlog_write(&rstream->riostream,
                          iov[i].iov_base, bytes);
            break;
        }
    }

    stream->ostream.offset += ret;
    return ret;
}

struct ostream *
o_stream_create_rawlog(struct ostream *output, const char *rawlog_path,
               int rawlog_fd, enum iostream_rawlog_flags flags)
{
    struct ostream *rawlog_output;
    bool autoclose_fd = (flags & IOSTREAM_RAWLOG_FLAG_AUTOCLOSE) != 0;

    i_assert(rawlog_path != NULL);
    i_assert(rawlog_fd != -1);

    rawlog_output = autoclose_fd ?
        o_stream_create_fd_autoclose(&rawlog_fd, 0):
        o_stream_create_fd(rawlog_fd, 0);

    o_stream_set_name(rawlog_output,
              t_strdup_printf("rawlog(%s)", rawlog_path));
    return o_stream_create_rawlog_from_stream(output, rawlog_output, flags);
}

struct ostream *
o_stream_create_rawlog_from_stream(struct ostream *output,
                   struct ostream *rawlog_output,
                   enum iostream_rawlog_flags flags)
{
    struct rawlog_ostream *rstream;

    rstream = i_new(struct rawlog_ostream, 1);
    rstream->ostream.sendv = o_stream_rawlog_sendv;
    rstream->ostream.iostream.close = o_stream_rawlog_close;

    rstream->riostream.rawlog_output = rawlog_output;
    iostream_rawlog_init(&rstream->riostream, flags, FALSE);
    return o_stream_create(&rstream->ostream, output,
                   o_stream_get_fd(output));
}