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ao_coreaudio: reset possibly random errno value

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In general, you need to check errno when using strtol(), but as far as I
know, strtol() won't reset errno on success. This has to be done
manually. The code could have failed sporadically if strtol() succeeded,
and errno was already set to one of the checked values.

(This strtol() still isn't fully error checked, but I don't know if it's
intentional, e.g. for parsing a numeric prefix only.)
This commit is contained in:
wm4 2015-01-20 14:32:01 +01:00
parent d44b4ccba1
commit 1e6b4d31aa
1 changed files with 2 additions and 1 deletions
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3
audio/out/ao_coreaudio_utils.c
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@ -65,7 +65,8 @@ coreaudio_error:
OSStatus ca_select_device(struct ao *ao, char* name, AudioDeviceID *device)
{
OSStatus err = noErr;
int selection = name ? strtol(name, (char **)NULL, 10) : -1;
errno = 0;
int selection = name && name[0] ? strtol(name, (char **)NULL, 10) : -1;
if (errno == EINVAL || errno == ERANGE) {
selection = -1;
MP_WARN(ao, "device identifier '%s' is invalid\n", name);