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Change snd_dlopen() function to return the error string

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The dlopen() function might fail also for another reason than
a missing file, thus return the error string from dlerror().

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
This commit is contained in:
Jaroslav Kysela 2017-11-22 13:23:45 +01:00
parent 38a39091e3
commit c051036e17
13 changed files with 90 additions and 51 deletions
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10
src/mixer/simple_abst.c
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@ -66,7 +66,7 @@ static int try_open(snd_mixer_class_t *class, const char *lib)
class_priv_t *priv = snd_mixer_class_get_private(class);
snd_mixer_event_t event_func;
snd_mixer_sbasic_init_t init_func = NULL;
char *xlib, *path;
char *xlib, *path, errbuf[256];
void *h;
int err = 0;
@ -81,9 +81,9 @@ static int try_open(snd_mixer_class_t *class, const char *lib)
strcpy(xlib, path);
strcat(xlib, "/");
strcat(xlib, lib);
h = snd_dlopen(xlib, RTLD_NOW);
h = snd_dlopen(xlib, RTLD_NOW, errbuf, sizeof(errbuf));
if (h == NULL) {
SNDERR("Unable to open library '%s'", xlib);
SNDERR("Unable to open library '%s' (%s)", xlib, errbuf);
free(xlib);
return -ENXIO;
}
@ -114,7 +114,7 @@ static int try_open_full(snd_mixer_class_t *class, snd_mixer_t *mixer,
class_priv_t *priv = snd_mixer_class_get_private(class);
snd_mixer_event_t event_func;
snd_mixer_sfbasic_init_t init_func = NULL;
char *xlib, *path;
char *xlib, *path, errbuf[256];
void *h;
int err = 0;
@ -128,7 +128,7 @@ static int try_open_full(snd_mixer_class_t *class, snd_mixer_t *mixer,
strcat(xlib, "/");
strcat(xlib, lib);
/* note python modules requires RTLD_GLOBAL */
h = snd_dlopen(xlib, RTLD_NOW|RTLD_GLOBAL);
h = snd_dlopen(xlib, RTLD_NOW|RTLD_GLOBAL, errbuf, sizeof(errbuf));
if (h == NULL) {
SNDERR("Unable to open library '%s'", xlib);
free(xlib);