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#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include "os.h"
#include "vt.h"
#include "fdset.h"
#include "vbi.h"
#include "lang.h"
#include "misc.h"
char *fmt = "%a %b %d %H:%M:%S %Z %Y";
int max_diff = 2*60*60; // default: 2 hours
int set_time = 0;
char *outfile = "";
static char *channel;
u_int16_t sid;
static void chk_time(int t)
{
struct tm *tm;
time_t sys_t;
int dt;
char buf[256];
if (t < 0 || t > 235959 || t%100 > 59 || t/100%100 > 59)
return;
sys_t = time(0);
tm = localtime(&sys_t);
// Now convert to UTC seconds
t = t/100/100 * 60*60 + t/100%100 * 60 + t%100;
#ifdef BSD
t -= tm->tm_gmtoff; // dst already included...
#else
t += timezone;
if (tm->tm_isdst)
t -= 60*60;
#endif
dt = t - sys_t % (24*60*60);
if (dt <= -12*60*60)
dt += 24*60*60;
if (dt <= -max_diff || dt >= max_diff)
fatal("time diff too big (%2d:%02d:%02d)", dt/60/60, abs(dt)/60%60, abs(dt)%60);
sys_t += dt;
if (set_time)
{
struct timeval tv[1];
tv->tv_sec = sys_t;
tv->tv_usec = 500000;
if (settimeofday(tv, 0) == -1)
ioerror("settimeofday");
}
if (*fmt)
{
tm = localtime(&sys_t);
if (strftime(buf, sizeof(buf), fmt, tm))
puts(buf);
}
exit(0);
}
static void event(void *_, struct vt_event *ev)
{
switch (ev->type)
{
/* vbi may generate EV_PAGE, EV_HEADER, EV_XPACKET */
/* for event arguments see vt.h */
case EV_HEADER: // a new title line (for running headers)
{
static int last_t = -1;
u8 *s = ev->p1;
int i, t = 1;
if (ev->i2 & PG_OUTOFSEQ)
break;
for (i = 32; i < 40; ++i)
if (s[i] >= '0' && s[i] <= '9')
t = t * 10+ s[i] - '0';
if (t >= 1000000 && t <= 1235959)
if (t == last_t || t - last_t == 1)
chk_time(t - 1000000);
last_t = t;
break;
}
}
}
static void usage(FILE *fp, int exit_val)
{
fprintf(fp, "usage: %s [options]\n", prgname);
fprintf(fp,
"\n"
" Valid options:\t\tDefault:\n"
" -d -delta <max_secs>\t7200 (2 hours)\n"
" -f -format <fmtstr>\t\t%%c\n"
" -h -help\n"
" -s -set\t\t\toff\n"
" -to -timeout <seconds>\t(none)\n"
" -v -vbi <vbidev>\t\t/dev/vbi\n"
" \t\t/dev/vbi0\n"
" \t\t/dev/video0\n"
" \t\t/dev/dvb/adapter0/demux0\n"
);
exit(exit_val);
}
static int option(int argc, char **argv, int *ind, char **arg)
{
static struct { char *nam, *altnam; int arg; } opts[] = {
{ "-delta", "-d", 1 },
{ "-format", "-f", 1 },
{ "-help", "-h", 0 },
{ "-set", "-s", 0 },
{ "-timeout", "-to", 1 },
{ "-vbi", "-v", 1 },
};
int i;
if (*ind >= argc)
return 0;
*arg = argv[(*ind)++];
for (i = 0; i < NELEM(opts); ++i)
if (streq(*arg, opts[i].nam) || streq(*arg, opts[i].altnam))
{
if (opts[i].arg)
if (*ind < argc)
*arg = argv[(*ind)++];
else
fatal("option %s requires an argument", *arg);
return i+1;
}
if (**arg == '-')
{
fatal("%s: invalid option", *arg);
usage(stderr, 1);
}
return -1;
}
int main(int argc, char **argv)
{
char *vbi_name = NULL;
int timeout = 0;
struct vbi *vbi;
int opt, ind;
char *arg;
int ttpid = -1;
setprgname(argv[0]);
ind = 1;
while (opt = option(argc, argv, &ind, &arg))
switch (opt)
{
case 1: // -delta
max_diff = atoi(arg);
if (max_diff < 1)
fatal("-delta: illegal value '%s'", arg);
if (max_diff > 12*60*60)
{
max_diff = 12*60*60;
error("-delta: %d too big. Assuming %d", arg, max_diff);
}
break;
case 2: // -format
fmt = arg;
break;
case 3: // help
usage(stdout, 0);
break;
case 4: // -set
set_time = 1;
break;
case 5: // -timeout
timeout = atoi(arg);
if (timeout < 1 || timeout > 60*60)
fatal("-timeout: illegal value '%s'", arg);
break;
case 6: // -vbi
vbi_name = arg;
break;
case -1:
usage(stderr, 1);
break;
}
fdset_init(fds);
if (timeout)
{
signal(SIGALRM, SIG_DFL); // kill me
alarm(timeout);
}
vbi = vbi_open(vbi_name, 0, channel, outfile, sid, ttpid); // open device
if (not vbi)
fatal_ioerror(vbi_name);
vbi_add_handler(vbi, event, 0); // register event handler
for (;;)
fdset_select(fds, -1); // call scheduler
/* never reached */
vbi_del_handler(vbi, event, 0);
vbi_close(vbi);
exit(0);
}
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