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#include "signal.h"
#include "text.h"
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <sys/stat.h>
#include <assert.h>
struct state {
int fd;
struct text * text;
};
static int
open_fifo(const char * path)
{
if (access(path, F_OK) != 0) {
printf("FIFO doesn't exist\n");
return -1;
}
if (access(path, W_OK) != 0) {
printf("FIFO not writable\n");
return -1;
}
return open(path, O_WRONLY);
}
static int
init_state(struct state * s, const char * path)
{
s->text = NULL;
s->fd = open_fifo(path);
if(s->fd < 1) return -1;
s->text = text_new();
return 0;
}
static void
deinit_state(struct state * s)
{
if(s->fd > 0) close(s->fd);
if(s->text) text_free(s->text);
}
static void
update_status(struct state * s)
{
const size_t
msg_len = TEXT_SIZE + 3;
size_t actual_len;
char msg[msg_len];
text_update(s->text);
snprintf(msg, msg_len, " %s\n", text_get_val(s->text));
actual_len = strlen(msg);
write(s->fd, msg, actual_len);
}
static void
run_loop(struct state * s)
{
while(signal_running) {
update_status(s);
usleep(1000 * 800);
}
}
int main(int argc, char ** argv)
{
int rc;
struct state s;
assert(argc == 2);
signal_setup_actions();
rc = init_state(&s, argv[1]);
if(rc == 0) run_loop(&s);
deinit_state(&s);
return 0;
}
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