linux-dvb-apps.git - linux-dvb-apps Debian packaging

diff options

Diffstat (limited to 'util/scan/dvb-t/se-Karlshamn')

0 files changed, 0 insertions, 0 deletions

/* dvbdate - a program to set the system date and time from a TDT multiplex Copyright (C) Laurence Culhane 2002 <dvbdate@holmes.demon.co.uk> Mercilessly ripped off from dvbtune, Copyright (C) Dave Chapman 2001 Revamped by Johannes Stezenbach <js@convergence.de> and Michael Hunold <hunold@convergence.de> 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 2 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, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. Or, point your browser to http://www.gnu.org/copyleft/gpl.html Copyright (C) Laurence Culhane 2002 <dvbdate@holmes.demon.co.uk> */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/ioctl.h> #include <sys/poll.h> #include <errno.h> #include <getopt.h> #include <stdarg.h> #include <linux/dvb/dmx.h> #define bcdtoint(i) ((((i & 0xf0) >> 4) * 10) + (i & 0x0f)) /* How many seconds can the system clock be out before we get warned? */ #define ALLOWABLE_DELTA 30*60 char *ProgName; int do_print; int do_set; int do_force; int do_quiet; int timeout = 25; void errmsg(char *message, ...) { va_list ap; va_start(ap, message); fprintf(stderr, "%s: ", ProgName); vfprintf(stderr, message, ap); va_end(ap); } void usage() { fprintf(stderr, "usage: %s [-p] [-s] [-f] [-q] [-h]\n", ProgName); _exit(1); } void help() { fprintf(stderr, "\nhelp:\n" "%s [-p] [-s] [-f] [-q] [-h] [-t n]\n" " --print (print current time, TDT time and delta)\n" " --set (set the system clock to TDT time)\n" " --force (force the setting of the clock)\n" " --quiet (be silent)\n" " --help (display this message)\n"" --timout n (max seconds to wait, default: 25)\n", ProgName); _exit(1); } int do_options(int arg_count, char **arg_strings) { static struct option Long_Options[] = { {"print", 0, 0, 'p'}, {"set", 0, 0, 's'}, {"force", 0, 0, 'f'}, {"quiet", 0, 0, 'q'}, {"help", 0, 0, 'h'}, {"timeout", 1, 0, 't'}, {0, 0, 0, 0} }; int c; int Option_Index = 0; while (1) { c = getopt_long(arg_count, arg_strings, "psfqht:", Long_Options, &Option_Index); if (c == EOF) break; switch (c) { case 't': timeout = atoi(optarg); if (0 == timeout) { fprintf(stderr, "%s: invalid timeout value\n", ProgName); usage(); } break; case 'p': do_print = 1; break; case 's': do_set = 1; break; case 'f': do_force = 1; break; case 'q': do_quiet = 1; break; case 'h': help(); break; case '?': usage(); break; case 0: /* * Which long option has been selected? We only need this extra switch * to cope with the case of wanting to assign two long options the same * short character code. */ printf("long option index %d\n", Option_Index); switch (Option_Index) { case 0: /* Print */ case 1: /* Set */ case 2: /* Force */ case 3: /* Quiet */ case 4: /* Help */ case 5: /* timout */ break; default: fprintf(stderr, "%s: unknown long option %d\n", ProgName, Option_Index); usage(); } break; /* * End of Special Long-opt handling code */ default: fprintf(stderr, "%s: unknown getopt error - returned code %02x\n", ProgName, c); _exit(1); } } return 0; } /* * return the TDT time in UNIX time_t format */ time_t convert_date(char *dvb_buf) { int i; int year, month, day, hour, min, sec; long int mjd; struct tm dvb_time; mjd = (dvb_buf[0] & 0xff) << 8; mjd += (dvb_buf[1] & 0xff); hour = bcdtoint(dvb_buf[2] & 0xff); min = bcdtoint(dvb_buf[3] & 0xff); sec = bcdtoint(dvb_buf[4] & 0xff); /* * Use the routine specified in ETSI EN 300 468 V1.4.1, * "Specification for Service Information in Digital Video Broadcasting" * to convert from Modified Julian Date to Year, Month, Day. */ year = (int) ((mjd - 15078.2) / 365.25); month = (int) ((mjd - 14956.1 - (int) (year * 365.25)) / 30.6001); day = mjd - 14956 - (int) (year * 365.25) - (int) (month * 30.6001); if (month == 14 || month == 15) i = 1; else i = 0; year += i; month = month - 1 - i * 12; dvb_time.tm_sec = sec; dvb_time.tm_min = min; dvb_time.tm_hour = hour; dvb_time.tm_mday = day; dvb_time.tm_mon = month - 1; dvb_time.tm_year = year; dvb_time.tm_isdst = -1; dvb_time.tm_wday = 0; dvb_time.tm_yday = 0; return (timegm(&dvb_time)); } /* * Get the next UTC date packet from the TDT multiplex */ int scan_date(time_t *dvb_time, unsigned int to) { int fd_date; int n, seclen; time_t t; unsigned char buf[4096]; struct dmx_sct_filter_params sctFilterParams; struct pollfd ufd; int found = 0; t = 0; if ((fd_date = open("/dev/dvb/adapter0/demux0", O_RDWR | O_NONBLOCK)) < 0) { perror("fd_date DEVICE: "); return -1; } memset(&sctFilterParams, 0, sizeof(sctFilterParams)); sctFilterParams.pid = 0x14; sctFilterParams.timeout = 0; sctFilterParams.flags = DMX_IMMEDIATE_START; sctFilterParams.filter.filter[0] = 0x70; sctFilterParams.filter.mask[0] = 0xff; if (ioctl(fd_date, DMX_SET_FILTER, &sctFilterParams) < 0) { perror("DATE - DMX_SET_FILTER:"); close(fd_date); return -1; } while (to > 0) { int res; memset(&ufd,0,sizeof(ufd)); ufd.fd=fd_date; ufd.events=POLLIN; res = poll(&ufd,1,1000); if (0 == res) { fprintf(stdout, "."); fflush(stdout); to--; continue; } if (1 == res) { found = 1; break; } errmsg("error polling for data"); close(fd_date); return -1; } fprintf(stdout, "\n"); if (0 == found) { errmsg("timeout - try tuning to a multiplex?\n"); close(fd_date); return -1; } if ((n = read(fd_date, buf, 4096)) >= 3) { seclen = ((buf[1] & 0x0f) << 8) | (buf[2] & 0xff); if (n == seclen + 3) { t = convert_date(&(buf[3])); } else { errmsg("Under-read bytes for DATE - wanted %d, got %d\n", seclen, n); return 0; } } else { errmsg("Nothing to read from fd_date - try tuning to a multiplex?\n"); return 0; } close(fd_date); *dvb_time = t; return 0; } /* * Set the system time */ int set_time(time_t * new_time) { if (stime(new_time)) { perror("Unable to set time"); return -1; } return 0; } int main(int argc, char **argv) { time_t dvb_time; time_t real_time; time_t offset; int ret; do_print = 0; do_force = 0; do_set = 0; do_quiet = 0; ProgName = argv[0]; /* * Process command line arguments */ do_options(argc, argv); if (do_quiet && do_print) { errmsg("quiet and print options are mutually exclusive.\n"); exit(1); } /* * Get the date from the currently tuned TDT multiplex */ ret = scan_date(&dvb_time, timeout); if (ret != 0) { errmsg("Unable to get time from multiplex.\n"); exit(1); } time(&real_time); offset = dvb_time - real_time; if (do_print) { fprintf(stdout, "System time: %s", ctime(&real_time)); fprintf(stdout, " TDT time: %s", ctime(&dvb_time)); fprintf(stdout, " Offset: %ld seconds\n", offset); } else if (!do_quiet) { fprintf(stdout, "%s", ctime(&dvb_time)); } if (do_set) { if (labs(offset) > ALLOWABLE_DELTA) { if (do_force) { if (0 != set_time(&dvb_time)) { errmsg("setting the time failed\n"); } } else { errmsg("multiplex time differs by more than %d from system.\n", ALLOWABLE_DELTA); errmsg("use -f to force system clock to new time.\n"); exit(1); } } else { set_time(&dvb_time); } } /* #end if (do_set) */ return (0); }


context:
space:
mode: