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/*
* espeakup - interface which allows speakup to use espeak
*
* Copyright (C) 2008 William Hubbs
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/file.h>
#include "espeakup.h"
/* path to our pid file */
char *pidPath = "/var/run/espeakup.pid";
int debug = 0;
enum espeakup_mode_t espeakup_mode = ESPEAKUP_MODE_SPEAKUP;
struct queue_t *synth_queue = NULL;
int self_pipe_fds[2];
volatile int should_run = 1;
espeak_AUDIO_OUTPUT audio_mode;
pthread_cond_t runner_awake = PTHREAD_COND_INITIALIZER;
pthread_cond_t stop_acknowledged = PTHREAD_COND_INITIALIZER;
pthread_mutex_t queue_guard = PTHREAD_MUTEX_INITIALIZER;
int espeakup_start_daemon(void)
{
int fds[2];
pid_t pid;
char c;
if (pipe(fds) < 0) {
perror("pipe");
exit(1);
}
pid = fork();
if (pid < 0) {
perror("fork");
exit(1);
}
if (pid) {
/* Parent, just wait for daemon */
if (read(fds[0], &c, 1) < 0) {
printf("Espeakup is already running!\n");
exit(1);
}
exit(c);
}
/* Child, create new session */
setsid();
pid = fork();
if (pid)
/* Intermediate child, just exit */
exit(0);
/* Child */
if (chdir("/") < 0) {
c = 1;
(void)write(fds[1], &c, 1);
exit(1);
}
return fds[1];
}
int espeakup_is_running(void)
{
int pidFile;
int n;
char s[16];
pid_t pid;
pidFile = open(pidPath, O_RDWR | O_CREAT, 0666);
if (pidFile < 0) {
printf("Can not work with the pid file %s: %s\n", pidPath,
strerror(errno));
return -1;
}
if (flock(pidFile, LOCK_EX) < 0) {
printf("Can not lock the pid file %s: %s\n", pidPath,
strerror(errno));
goto error;
}
n = read(pidFile, s, sizeof(s) - 1);
if (n < 0) {
printf("Can not read the pid file %s: %s\n", pidPath,
strerror(errno));
goto error;
}
s[n] = 0;
n = sscanf(s, "%d", &pid);
if (n == 1 && (!kill(pid, 0) || errno != ESRCH)) {
/* Already running */
close(pidFile);
return 1;
}
if (ftruncate(pidFile, 0) < 0) {
printf("Could not truncate the pid file %s: %s\n", pidPath,
strerror(errno));
goto error;
}
lseek(pidFile, 0, SEEK_SET);
n = snprintf(s, sizeof(s), "%d", getpid());
if (write(pidFile, s, n) < 0) {
printf("Could not write to the pid file %s: %s\n", pidPath,
strerror(errno));
goto error;
}
close(pidFile);
return 0;
error:
close(pidFile);
return -1;
}
int main(int argc, char **argv)
{
int fd, devnull;
char ret = 0;
sigset_t sigset;
int err;
pthread_t signal_thread_id;
pthread_t espeak_thread_id;
pthread_t softsynth_thread_id;
struct synth_t s = {
.voice = "",
};
synth_queue = new_queue();
if (!synth_queue) {
fprintf(stderr, "Unable to allocate memory.\n");
return 2;
}
/* set up the pipe used to wake the espeak thread */
if (pipe(self_pipe_fds) < 0) {
perror("Unable to create pipe");
return 5;
}
/* process command line options */
process_cli(argc, argv);
if (!debug && espeakup_mode == ESPEAKUP_MODE_SPEAKUP) {
fd = espeakup_start_daemon();
if (espeakup_is_running()) {
printf("Espeakup is already running!\n");
ret = 1;
goto out;
}
devnull = open("/dev/null", O_RDWR);
dup2(devnull, STDIN_FILENO);
dup2(devnull, STDOUT_FILENO);
dup2(devnull, STDERR_FILENO);
if (devnull > 2)
close(devnull);
}
/* create the signal processing thread here. */
err = pthread_create(&signal_thread_id, NULL, signal_thread, NULL);
if (err != 0) {
ret = 4;
goto out;
}
/*
* Set up the signal mask which will be the default for all threads.
* We are handling sigint and sigterm, so block them.
*/
sigemptyset(&sigset);
sigaddset(&sigset, SIGINT);
sigaddset(&sigset, SIGTERM);
sigprocmask(SIG_BLOCK, &sigset, NULL);
/* Initialize espeak */
if (initialize_espeak(&s) < 0) {
ret = 2;
goto out;
}
/* open the softsynth */
if (open_softsynth() < 0) {
ret = 2;
goto out;
}
/* Spawn our softsynth thread. */
err = pthread_create(&softsynth_thread_id, NULL, softsynth_thread, &s);
if (err != 0) {
ret = 4;
goto out;
}
/* Spawn our espeak-interacting thread. */
err = pthread_create(&espeak_thread_id, NULL, espeak_thread, &s);
if (err != 0) {
ret = 4;
goto out;
}
if (!debug && espeakup_mode == ESPEAKUP_MODE_SPEAKUP)
(void)write(fd, &ret, 1);
/* wait for the threads to shut down. */
pthread_join(signal_thread_id, NULL);
pthread_join(softsynth_thread_id, NULL);
pthread_join(espeak_thread_id, NULL);
espeak_Terminate();
close_softsynth();
out:
if (!debug && espeakup_mode == ESPEAKUP_MODE_SPEAKUP) {
if (ret != 1)
unlink(pidPath);
if (ret != 0)
(void)write(fd, &ret, 1);
/* If ret was 0, the status byte was written before joining
* the threads. */
}
return ret;
}