mlow/mpd_control
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Clean handling of connection loss to MPD.

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This commit is contained in:
Matt Low 2019-10-17 01:52:32 +04:00
parent 61c69691b4
commit d2ae447bda
1 changed files with 32 additions and 16 deletions
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48
mpd_control.c
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@ -41,13 +41,24 @@ scroll_text(const char *text_to_scroll, const size_t text_len, char *buffer,
}
static int
handle_error(struct mpd_connection *c)
handle_error(struct mpd_connection *conn, bool renew)
{
assert(mpd_connection_get_error(c) != MPD_ERROR_SUCCESS);
fprintf(stderr, "%s\n", mpd_connection_get_error_message(c));
mpd_connection_free(c);
return EXIT_FAILURE;
if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS) {
if (!renew) {
fprintf(stderr, "%s\n", mpd_connection_get_error_message(conn));
}
if (!mpd_connection_clear_error(conn)) {
if (renew) {
mpd_connection_free(conn);
conn = mpd_connection_new(NULL, 0, 0);
return handle_error(conn, false);
}
return EXIT_FAILURE;
} else {
return 0;
}
}
return 0;
}
static void
@ -67,7 +78,7 @@ print_status(struct mpd_connection *conn, struct worker_meta *meta)
struct mpd_status *status = mpd_run_status(conn);
if (status == NULL)
return handle_error(conn);
return handle_error(conn, false);
const enum mpd_state state = mpd_status_get_state(status);
@ -106,7 +117,7 @@ print_status(struct mpd_connection *conn, struct worker_meta *meta)
mpd_status_free(status);
if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS)
return handle_error(conn);
return handle_error(conn, false);
char artist[256];
char album[256];
@ -119,7 +130,7 @@ print_status(struct mpd_connection *conn, struct worker_meta *meta)
mpd_song_free(song);
if (mpd_connection_get_error(conn) != MPD_ERROR_SUCCESS)
return handle_error(conn);
return handle_error(conn, false);
// the full song label. would be cool if this was customizable at runtime
char full_label[strlen(artist) + strlen(title) + 4];
@ -170,18 +181,17 @@ status_loop(void* worker_meta)
struct worker_meta *meta = (struct worker_meta*)worker_meta;
struct mpd_connection *conn = mpd_connection_new(NULL, 0, 0);
for (;;) {
if (meta->stop) {
break;
}
while (!meta->stop) {
long long start = current_timestamp();
if (print_status(conn, meta) == 0) {
if (handle_error(conn, true) == 0 && print_status(conn, meta) == 0) {
meta->scroll_index++;
}
usleep((meta->update_interval - (current_timestamp() - start)) * 1000);
long long elapsed = current_timestamp() - start;
if (meta->update_interval - elapsed >= 0) {
usleep((meta->update_interval - elapsed) * 1000);
}
}
mpd_connection_free(conn);
@ -221,6 +231,12 @@ mpd_run_command(struct worker_meta *meta, enum click_command command) {
int main(void) {
struct worker_meta meta = {950, false, 30, 0, malloc(1024)};
struct sigaction new_actn, old_actn;
new_actn.sa_handler = SIG_IGN;
sigemptyset(&new_actn.sa_mask);
new_actn.sa_flags = 0;
sigaction(SIGPIPE, &new_actn, &old_actn);
pthread_t update_thread;
if(pthread_create(&update_thread, NULL, status_loop, &meta)) {
fprintf(stderr, "Error creating thread\n");