trunk/libsbutil/sb_open.c

/*
 * sb_open.c
 *
 * IO functions.
 *
 * Copyright 1999-2006 Gentoo Foundation
 *
 *
 *      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 version 2 of the License.
 *
 *      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.,
 *      675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * $Header$
 */


#include <errno.h>
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>

#include "sbutil.h"


static int (*sbio_open)(const char *, int, mode_t) = (void *)open;


void sb_set_open(void *new_open)
{
        if (!check_ptr(new_open))
                return;

        sbio_open = new_open;
}

/* General purpose function to _reliably_ open a file
 *
 * Returns the file descriptor or -1 on error (and errno set)
 */

int sb_open(const char *path, int flags, mode_t mode)
{
        int fd;

        do {
                fd = sbio_open(path, flags, mode);
        } while ((-1 == fd) && (EINTR == errno));
        
        if ((-1 != fd) && (0 != errno))
                /* Do not trigger debugging */
                errno = 0;

        if (-1 == fd)
                DBG_MSG("Failed to open file '%s'!\n", path);

        return fd;
}

1	/*
2	* sb_open.c
3	*
4	* IO functions.
5	*
6	* Copyright 1999-2006 Gentoo Foundation
7	*
8	*
9	* This program is free software; you can redistribute it and/or modify it
10	* under the terms of the GNU General Public License as published by the
11	* Free Software Foundation version 2 of the License.
12	*
13	* This program is distributed in the hope that it will be useful, but
14	* WITHOUT ANY WARRANTY; without even the implied warranty of
15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16	* General Public License for more details.
17	*
18	* You should have received a copy of the GNU General Public License along
19	* with this program; if not, write to the Free Software Foundation, Inc.,
20	* 675 Mass Ave, Cambridge, MA 02139, USA.
21	*
22	* $Header$
23	*/
24
25
26	#include <errno.h>
27	#include <stdio.h>
28	#include <sys/stat.h>
29	#include <unistd.h>
30	#include <fcntl.h>
31
32	#include "sbutil.h"
33
34
35	static int (sbio_open)(const char , int, mode_t) = (void *)open;
36
37
38	void sb_set_open(void *new_open)
39	{
40	if (!check_ptr(new_open))
41	return;
42
43	sbio_open = new_open;
44	}
45
46	/* General purpose function to _reliably_ open a file
47	*
48	* Returns the file descriptor or -1 on error (and errno set)
49	*/
50
51	int sb_open(const char *path, int flags, mode_t mode)
52	{
53	int fd;
54
55	do {
56	fd = sbio_open(path, flags, mode);
57	} while ((-1 == fd) && (EINTR == errno));
58
59	if ((-1 != fd) && (0 != errno))
60	/* Do not trigger debugging */
61	errno = 0;
62
63	if (-1 == fd)
64	DBG_MSG("Failed to open file '%s'!\n", path);
65
66	return fd;
67	}
68