mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
808ce5deb3
Coverity Static Analysis helps developers find hard-to-spot, yet potentially crash-causing defects early in the development phase, reducing the cost,time, and risk of software errors. This patch has fix for situations where variable can be NULL but not been checked beforehand Signed-off-by: Takashi Iwai <tiwai@suse.de>
106 lines
2.9 KiB
C
106 lines
2.9 KiB
C
/*
|
|
* Mixer Interface - simple abstact module - base library (dlopen function)
|
|
* Copyright (c) 2005 by Jaroslav Kysela <perex@perex.cz>
|
|
*
|
|
*
|
|
* 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 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 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, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
#include <sys/ioctl.h>
|
|
#include <math.h>
|
|
#include <dlfcn.h>
|
|
#include "config.h"
|
|
#include "asoundlib.h"
|
|
#include "mixer_abst.h"
|
|
#include "sbase.h"
|
|
|
|
#define SO_PATH ALSA_PLUGIN_DIR "/smixer"
|
|
|
|
int mixer_simple_basic_dlopen(snd_mixer_class_t *class,
|
|
bclass_base_ops_t **ops)
|
|
{
|
|
struct bclass_private *priv = snd_mixer_sbasic_get_private(class);
|
|
const char *lib = "smixer-sbase.so";
|
|
void (*initpriv)(snd_mixer_class_t *class, struct bclass_private *priv);
|
|
char *xlib, *path;
|
|
void *h;
|
|
int initflag = 0;
|
|
|
|
if (priv == NULL) {
|
|
priv = calloc(1, sizeof(*priv));
|
|
if (priv == NULL)
|
|
return -ENOMEM;
|
|
initflag = 1;
|
|
}
|
|
path = getenv("ALSA_MIXER_SIMPLE_MODULES");
|
|
if (!path)
|
|
path = SO_PATH;
|
|
xlib = malloc(strlen(lib) + strlen(path) + 1 + 1);
|
|
if (xlib == NULL) {
|
|
if (initflag)
|
|
free(priv);
|
|
return -ENOMEM;
|
|
}
|
|
strcpy(xlib, path);
|
|
strcat(xlib, "/");
|
|
strcat(xlib, lib);
|
|
h = snd_dlopen(xlib, RTLD_NOW);
|
|
if (h == NULL) {
|
|
SNDERR("Unable to open library '%s'", xlib);
|
|
goto __error;
|
|
}
|
|
initpriv = dlsym(h, "alsa_mixer_sbasic_initpriv");
|
|
if (initpriv == NULL) {
|
|
SNDERR("Symbol 'alsa_mixer_sbasic_initpriv' was not found in '%s'", xlib);
|
|
goto __error;
|
|
}
|
|
priv->ops.event = dlsym(h, "alsa_mixer_sbasic_event");
|
|
if (priv->ops.event == NULL) {
|
|
SNDERR("Symbol 'alsa_mixer_sbasic_event' was not found in '%s'", xlib);
|
|
goto __error;
|
|
}
|
|
priv->ops.selreg = dlsym(h, "alsa_mixer_sbasic_selreg");
|
|
if (priv->ops.selreg == NULL) {
|
|
SNDERR("Symbol 'alsa_mixer_sbasic_selreg' was not found in '%s'", xlib);
|
|
goto __error;
|
|
}
|
|
priv->ops.sidreg = dlsym(h, "alsa_mixer_sbasic_sidreg");
|
|
if (priv->ops.sidreg == NULL) {
|
|
SNDERR("Symbol 'alsa_mixer_sbasic_sidreg' was not found in '%s'", xlib);
|
|
goto __error;
|
|
}
|
|
free(xlib);
|
|
if (initflag)
|
|
initpriv(class, priv);
|
|
priv->dl_sbase = h;
|
|
if (ops)
|
|
*ops = &priv->ops;
|
|
return 1;
|
|
|
|
__error:
|
|
if (initflag)
|
|
free(priv);
|
|
if (h)
|
|
snd_dlclose(h);
|
|
free(xlib);
|
|
return -ENXIO;
|
|
}
|