source: lib/iow-stdio.c @ 29d4438

4.0.1-hotfixescachetimestampsdevelopdpdk-ndagetsilivegetfragoffhelplibtrace4ndag_formatpfringrc-4.0.1rc-4.0.2rc-4.0.3rc-4.0.4ringdecrementfixringperformanceringtimestampfixes
Last change on this file since 29d4438 was 29d4438, checked in by Perry Lorier <perry@…>, 12 years ago

Support an "undocumented" libtraceio debug interface

  • Property mode set to 100644
File size: 2.2 KB
Line 
1/*
2 * This file is part of libtrace
3 *
4 * Copyright (c) 2007,2008,2009,2010 The University of Waikato, Hamilton,
5 * New Zealand.
6 *
7 * Authors: Daniel Lawson
8 *          Perry Lorier
9 *          Shane Alcock
10 *         
11 * All rights reserved.
12 *
13 * This code has been developed by the University of Waikato WAND
14 * research group. For further information please see http://www.wand.net.nz/
15 *
16 * libtrace is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * libtrace is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with libtrace; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
29 *
30 * $Id$
31 *
32 */
33
34
35#define _GNU_SOURCE 1
36#include "wandio.h"
37#include <sys/types.h>
38#include <sys/stat.h>
39#include <fcntl.h>
40#include <stdlib.h>
41#include <unistd.h>
42#include <string.h>
43
44/* Libtrace IO module implementing a standard IO writer, i.e. no decompression
45 */
46
47struct stdiow_t {
48        int fd;
49};
50
51extern iow_source_t stdio_wsource;
52
53#define DATA(iow) ((struct stdiow_t *)((iow)->data))
54
55iow_t *stdio_wopen(const char *filename)
56{
57        iow_t *iow = malloc(sizeof(iow_t));
58        iow->source = &stdio_wsource;
59        iow->data = malloc(sizeof(struct stdiow_t));
60
61        if (strcmp(filename,"-") == 0) 
62                DATA(iow)->fd = 1; /* STDOUT */
63        else
64                DATA(iow)->fd = open(filename,
65                                O_WRONLY
66                                |O_CREAT
67                                |O_TRUNC
68                                |(force_directio_write?O_DIRECT:0),
69                                0666);
70
71        if (DATA(iow)->fd == -1) {
72                free(iow);
73                return NULL;
74        }
75
76        return iow;
77}
78
79static off_t stdio_wwrite(iow_t *iow, const char *buffer, off_t len)
80{
81        return write(DATA(iow)->fd,buffer,len);
82}
83
84static void stdio_wclose(iow_t *iow)
85{
86        close(DATA(iow)->fd);
87        free(iow->data);
88        free(iow);
89}
90
91iow_source_t stdio_wsource = {
92        "stdiow",
93        stdio_wwrite,
94        stdio_wclose
95};
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