mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-12-23 21:34:54 +03:00
2925f9395e
clang doesn't like mode_t type as an argument to va_arg():
error: second argument to 'va_arg' is of promotable type 'mode_t' (aka
'unsigned short'); this va_arg has undefined behavior because arguments
will be promoted to 'int'
mode = va_arg(ap, mode_t);
^~~~~~
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
113 lines
2.5 KiB
C
113 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2014 Red Hat, Inc.
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library. If not, see
|
|
* <http://www.gnu.org/licenses/>.
|
|
*
|
|
* Author: Jan Tomko <jtomko@redhat.com>
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <stdlib.h>
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <dirent.h>
|
|
#include <dlfcn.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "viralloc.h"
|
|
#include "virfile.h"
|
|
#include "virstring.h"
|
|
#include "virusb.h"
|
|
|
|
#define USB_SYSFS "/sys/bus/usb"
|
|
#define FAKE_USB_SYSFS "virusbtestdata/sys_bus_usb"
|
|
|
|
static int (*realopen)(const char *pathname, int flags, ...);
|
|
static DIR *(*realopendir)(const char *name);
|
|
|
|
static void init_syms(void)
|
|
{
|
|
if (realopen)
|
|
return;
|
|
|
|
realopen = dlsym(RTLD_NEXT, "open");
|
|
realopendir = dlsym(RTLD_NEXT, "opendir");
|
|
if (!realopen || !realopendir) {
|
|
fprintf(stderr, "Error getting symbols");
|
|
abort();
|
|
}
|
|
}
|
|
|
|
static char *get_fake_path(const char *real_path)
|
|
{
|
|
const char *p = NULL;
|
|
char *path = NULL;
|
|
|
|
if ((p = STRSKIP(real_path, USB_SYSFS)) &&
|
|
virAsprintfQuiet(&path, "%s/%s/%s", abs_srcdir, FAKE_USB_SYSFS, p) < 0)
|
|
goto error;
|
|
else if (!p && VIR_STRDUP_QUIET(path, real_path) < 0)
|
|
goto error;
|
|
|
|
return path;
|
|
|
|
error:
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
|
|
DIR *opendir(const char *name)
|
|
{
|
|
char *path;
|
|
DIR* ret;
|
|
|
|
init_syms();
|
|
|
|
path = get_fake_path(name);
|
|
|
|
ret = realopendir(path);
|
|
VIR_FREE(path);
|
|
return ret;
|
|
}
|
|
|
|
int open(const char *pathname, int flags, ...)
|
|
{
|
|
char *path;
|
|
int ret;
|
|
va_list ap;
|
|
mode_t mode = 0;
|
|
|
|
init_syms();
|
|
|
|
path = get_fake_path(pathname);
|
|
if (!path)
|
|
return -1;
|
|
|
|
/* The mode argument is mandatory when O_CREAT is set in flags,
|
|
* otherwise the argument is ignored.
|
|
*/
|
|
if (flags & O_CREAT) {
|
|
va_start(ap, flags);
|
|
mode = (mode_t) va_arg(ap, int);
|
|
va_end(ap);
|
|
}
|
|
|
|
ret = realopen(path, flags, mode);
|
|
|
|
VIR_FREE(path);
|
|
return ret;
|
|
}
|