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Try to open /dev/speaker in the parent process, so that we can tell if

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we don't have permission to open it before we fork.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 966
This commit is contained in:
Simon Howard 2007-09-03 00:43:29 +00:00
parent 0517fad3f4
commit 604e09624e
1 changed files with 19 additions and 20 deletions
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39
pcsound/pcsound_bsd.c
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@ -142,25 +142,11 @@ static void AdjustedBeep(int speaker_handle, int ms, int freq)
sleep_adjust = actual_time - ms;
}
static void SoundServer(void)
static void SoundServer(int speaker_handle)
{
int speaker_handle;
tone_t tone;
int result;
// Try to open the speaker device
speaker_handle = open(SPEAKER_DEVICE, O_WRONLY);
if (speaker_handle == -1)
{
// Don't have permissions for the console device?
fprintf(stderr, "PCSound_BSD_Init: Failed to open '%s': %s\n",
SPEAKER_DEVICE, strerror(errno));
return;
}
// Run in a loop, invoking the callback
for (;;)
@ -181,10 +167,6 @@ static void SoundServer(void)
AdjustedBeep(speaker_handle, tone.duration, tone.frequency);
}
// Finished, close the handle
close(speaker_handle);
}
// Start up the sound server. Returns non-zero if successful.
@ -192,12 +174,27 @@ static void SoundServer(void)
static int StartSoundServer(void)
{
int result;
int speaker_handle;
// Try to open the speaker device
speaker_handle = open(SPEAKER_DEVICE, O_WRONLY);
if (speaker_handle == -1)
{
// Don't have permissions for the console device?
fprintf(stderr, "StartSoundServer: Failed to open '%s': %s\n",
SPEAKER_DEVICE, strerror(errno));
return 0;
}
// Create a pipe for communications
if (socketpair(AF_UNIX, SOCK_STREAM, 0, sound_server_pipe) < 0)
{
perror("socketpair");
close(speaker_handle);
return 0;
}
@ -210,13 +207,15 @@ static int StartSoundServer(void)
if (result < 0)
{
fprintf(stderr, "Failed to fork sound server!\n");
close(speaker_handle);
return 0;
}
else if (result == 0)
{
// This is the child (sound server)
SoundServer();
SoundServer(speaker_handle);
close(speaker_handle);
exit(0);
}