pjlib/src/pj/os_error_linux_kernel.c

/* $Id$ */
/* 
 * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com)
 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */
#include <pj/string.h>
#include <pj/compat/errno.h>
#include <linux/config.h>
#include <linux/version.h>
#if defined(MODVERSIONS)
#include <linux/modversions.h>
#endif
#include <linux/kernel.h>
#include <linux/errno.h>

int kernel_errno;

PJ_DEF(pj_status_t) pj_get_os_error(void)
{
    return errno;
}

PJ_DEF(void) pj_set_os_error(pj_status_t code)
{
    errno = code;
}

PJ_DEF(pj_status_t) pj_get_netos_error(void)
{
    return errno;
}

PJ_DEF(void) pj_set_netos_error(pj_status_t code)
{
    errno = code;
}

/* 
 * platform_strerror()
 *
 * Platform specific error message. This file is called by pj_strerror() 
 * in errno.c 
 */
int platform_strerror( pj_os_err_type os_errcode, 
                       char *buf, pj_size_t bufsize)
{
    char errmsg[PJ_ERR_MSG_SIZE];
    int len;
    
    /* Handle EINVAL as special case so that it'll pass errno test. */
    if (os_errcode==EINVAL)
	strcpy(errmsg, "Invalid value");
    else
	snprintf(errmsg, sizeof(errmsg), "errno=%d", os_errcode);
    
    len = strlen(errmsg);

    if (len >= bufsize)
	len = bufsize-1;

    pj_memcpy(buf, errmsg, len);
    buf[len] = '\0';

    return len;
}