/usr/src/speakup-3.1.5.dfsg.1/thread.c is in speakup 3.1.5.dfsg.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | #include <linux/kthread.h>
#include <linux/wait.h>
#include "spk_types.h"
#include "speakup.h"
#include "spk_priv.h"
DECLARE_WAIT_QUEUE_HEAD(speakup_event);
EXPORT_SYMBOL_GPL(speakup_event);
int speakup_thread(void *data)
{
unsigned long flags;
int should_break;
struct bleep our_sound;
our_sound.active = 0;
our_sound.freq = 0;
our_sound.jiffies = 0;
mutex_lock(&spk_mutex);
while (1) {
DEFINE_WAIT(wait);
while(1) {
spk_lock(flags);
our_sound = unprocessed_sound;
unprocessed_sound.active = 0;
prepare_to_wait(&speakup_event, &wait, TASK_INTERRUPTIBLE);
should_break = kthread_should_stop() ||
our_sound.active ||
(synth && synth->catch_up && synth->alive &&
(speakup_info.flushing ||
!synth_buffer_empty()));
spk_unlock(flags);
if (should_break)
break;
mutex_unlock(&spk_mutex);
schedule();
mutex_lock(&spk_mutex);
}
finish_wait(&speakup_event, &wait);
if (kthread_should_stop())
break;
if (our_sound.active) {
kd_mksound(our_sound.freq, our_sound.jiffies);
}
if (synth && synth->catch_up && synth->alive) {
/* It is up to the callee to take the lock, so that it
* can sleep whenever it likes */
synth->catch_up(synth);
}
speakup_start_ttys();
}
mutex_unlock(&spk_mutex);
return 0;
}
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