Imported Upstream version 1.1.1+rev1207upstream/1.1.1+rev1207

1 files changed, 767 insertions, 0 deletions

diff --git a/test/szap2.c b/test/szap2.c
new file mode 100644
index 0000000..e470229
--- /dev/null
+++ b/test/szap2.c
@@ -0,0 +1,767 @@
+/* szap -- simple zapping tool for the Linux DVB API
+ *
+ * szap operates on VDR (http://www.cadsoft.de/people/kls/vdr/index.htm)
+ * satellite channel lists (e.g. from http://www.dxandy.de/cgi-bin/dvbchan.pl).
+ * szap assumes you have a "Universal LNB" (i.e. with LOFs 9750/10600 MHz).
+ *
+ * Compilation: `gcc -Wall -I../../ost/include -O2 szap.c -o szap`
+ *  or, if your DVB driver is in the kernel source tree:
+ *              `gcc -Wall -DDVB_IN_KERNEL -O2 szap.c -o szap`
+ *
+ * Copyright (C) 2001 Johannes Stezenbach (js@convergence.de)
+ * for convergence integrated media
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/poll.h>
+#include <sys/param.h>
+#include <fcntl.h>
+#include <time.h>
+#include <unistd.h>
+
+#include <stdint.h>
+#include <sys/time.h>
+
+#include "../include/frontend.h"
+#include "../include/dmx.h"
+#include "../include/audio.h"
+#include "../include/version.h"
+#include "lnb.h"
+
+#ifndef TRUE
+#define TRUE (1==1)
+#endif
+#ifndef FALSE
+#define FALSE (1==0)
+#endif
+
+/* location of channel list file */
+#define CHANNEL_FILE "channels.conf"
+
+/* one line of the VDR channel file has the following format:
+ * ^name:frequency_MHz:polarization:sat_no:symbolrate:vpid:apid:?:service_id$
+ */
+
+
+#define FRONTENDDEVICE "/dev/dvb/adapter%d/frontend%d"
+#define DEMUXDEVICE "/dev/dvb/adapter%d/demux%d"
+#define AUDIODEVICE "/dev/dvb/adapter%d/audio%d"
+
+static struct lnb_types_st lnb_type;
+
+static int exit_after_tuning;
+static int interactive;
+
+static char *usage_str =
+    "\nusage: szap -q\n"
+    "         list known channels\n"
+    "       szap [options] {-n channel-number|channel_name}\n"
+    "         zap to channel via number or full name (case insensitive)\n"
+    "     -a number : use given adapter (default 0)\n"
+    "     -f number : use given frontend (default 0)\n"
+    "     -d number : use given demux (default 0)\n"
+    "     -c file   : read channels list from 'file'\n"
+    "     -b        : enable Audio Bypass (default no)\n"
+    "     -x        : exit after tuning\n"
+    "     -r        : set up /dev/dvb/adapterX/dvr0 for TS recording\n"
+    "     -l lnb-type (DVB-S Only) (use -l help to print types) or \n"
+    "     -l low[,high[,switch]] in Mhz\n"
+    "     -i        : run interactively, allowing you to type in channel names\n"
+    "     -p        : add pat and pmt to TS recording (implies -r)\n"
+    "                 or -n numbers for zapping\n"
+    "	  -t	    : delivery system type DVB-S=0, DSS=1, DVB-S2=2\n";
+
+static int set_demux(int dmxfd, int pid, int pes_type, int dvr)
+{
+	struct dmx_pes_filter_params pesfilter;
+
+	if (pid < 0 || pid >= 0x1fff) /* ignore this pid to allow radio services */
+		return TRUE;
+
+	if (dvr) {
+		int buffersize = 64 * 1024;
+		if (ioctl(dmxfd, DMX_SET_BUFFER_SIZE, buffersize) == -1)
+			perror("DMX_SET_BUFFER_SIZE failed");
+	}
+
+	pesfilter.pid = pid;
+	pesfilter.input = DMX_IN_FRONTEND;
+	pesfilter.output = dvr ? DMX_OUT_TS_TAP : DMX_OUT_DECODER;
+	pesfilter.pes_type = pes_type;
+	pesfilter.flags = DMX_IMMEDIATE_START;
+
+	if (ioctl(dmxfd, DMX_SET_PES_FILTER, &pesfilter) == -1) {
+		fprintf(stderr, "DMX_SET_PES_FILTER failed "
+			"(PID = 0x%04x): %d %m\n", pid, errno);
+
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+int get_pmt_pid(char *dmxdev, int sid)
+{
+	int patfd, count;
+	int pmt_pid = 0;
+	int patread = 0;
+	int section_length;
+	unsigned char buft[4096];
+	unsigned char *buf = buft;
+	struct dmx_sct_filter_params f;
+
+	memset(&f, 0, sizeof(f));
+	f.pid = 0;
+	f.filter.filter[0] = 0x00;
+	f.filter.mask[0] = 0xff;
+	f.timeout = 0;
+	f.flags = DMX_IMMEDIATE_START | DMX_CHECK_CRC;
+
+	if ((patfd = open(dmxdev, O_RDWR)) < 0) {
+		perror("openening pat demux failed");
+		return -1;
+	}
+
+	if (ioctl(patfd, DMX_SET_FILTER, &f) == -1) {
+		perror("ioctl DMX_SET_FILTER failed");
+		close(patfd);
+		return -1;
+	}
+
+	while (!patread) {
+		if (((count = read(patfd, buf, sizeof(buft))) < 0) && errno == EOVERFLOW)
+			count = read(patfd, buf, sizeof(buft));
+		if (count < 0) {
+			perror("read_sections: read error");
+			close(patfd);
+			return -1;
+		}
+
+		section_length = ((buf[1] & 0x0f) << 8) | buf[2];
+		if (count != section_length + 3)
+			continue;
+
+		buf += 8;
+		section_length -= 8;
+
+		patread = 1; /* assumes one section contains the whole pat */
+		while (section_length > 0) {
+			int service_id = (buf[0] << 8) | buf[1];
+			if (service_id == sid) {
+				pmt_pid = ((buf[2] & 0x1f) << 8) | buf[3];
+				section_length = 0;
+			}
+			buf += 4;
+			section_length -= 4;
+		}
+	}
+	close(patfd);
+	return pmt_pid;
+}
+
+struct diseqc_cmd {
+	struct dvb_diseqc_master_cmd cmd;
+	uint32_t wait;
+};
+
+void diseqc_send_msg(int fd, fe_sec_voltage_t v, struct diseqc_cmd *cmd,
+		     fe_sec_tone_mode_t t, fe_sec_mini_cmd_t b)
+{
+	if (ioctl(fd, FE_SET_TONE, SEC_TONE_OFF) == -1)
+		perror("FE_SET_TONE failed");
+	if (ioctl(fd, FE_SET_VOLTAGE, v) == -1)
+		perror("FE_SET_VOLTAGE failed");
+		usleep(15 * 1000);
+	if (ioctl(fd, FE_DISEQC_SEND_MASTER_CMD, &cmd->cmd) == -1)
+		perror("FE_DISEQC_SEND_MASTER_CMD failed");
+		usleep(cmd->wait * 1000);
+		usleep(15 * 1000);
+	if (ioctl(fd, FE_DISEQC_SEND_BURST, b) == -1)
+		perror("FE_DISEQC_SEND_BURST failed");
+		usleep(15 * 1000);
+	if (ioctl(fd, FE_SET_TONE, t) == -1)
+		perror("FE_SET_TONE failed");
+}
+
+
+
+
+/* digital satellite equipment control,
+ * specification is available from http://www.eutelsat.com/
+ */
+static int diseqc(int secfd, int sat_no, int pol_vert, int hi_band)
+{
+	struct diseqc_cmd cmd =
+		{ {{0xe0, 0x10, 0x38, 0xf0, 0x00, 0x00}, 4}, 0 };
+
+	/**
+	 * param: high nibble: reset bits, low nibble set bits,
+	 * bits are: option, position, polarizaion, band
+	 */
+	cmd.cmd.msg[3] =
+		0xf0 | (((sat_no * 4) & 0x0f) | (hi_band ? 1 : 0) | (pol_vert ? 0 : 2));
+
+	diseqc_send_msg(secfd, pol_vert ? SEC_VOLTAGE_13 : SEC_VOLTAGE_18,
+			&cmd, hi_band ? SEC_TONE_ON : SEC_TONE_OFF,
+			(sat_no / 4) % 2 ? SEC_MINI_B : SEC_MINI_A);
+
+	return TRUE;
+}
+
+#define DVBS	0
+#define DSS	1
+#define DVBS2	2
+
+static int do_tune(int fefd, unsigned int ifreq, unsigned int sr, unsigned int delsys)
+{
+	/*	API Major=3, Minor=1	*/
+	struct dvb_frontend_parameters tuneto;
+	struct dvb_frontend_event ev;
+	/*	API Major=3, Minor=2	*/
+	struct dvbfe_params fe_params;
+
+	/* discard stale QPSK events */
+	while (1) {
+		if (ioctl(fefd, FE_GET_EVENT, &ev) == -1)
+		break;
+	}
+
+	if ((DVB_API_VERSION == 3) && (DVB_API_VERSION_MINOR == 3)) {
+		printf("\n%s: API version=%d, delivery system = %d\n", __func__, DVB_API_VERSION_MINOR, delsys);
+
+		fe_params.frequency = ifreq;
+		fe_params.inversion = INVERSION_AUTO;
+		
+		switch (delsys) {
+		case DVBS:
+			fe_params.delsys.dvbs.symbol_rate = sr;
+			fe_params.delsys.dvbs.fec = FEC_AUTO;
+			printf("%s: Frequency = %d, Srate = %d\n",
+				__func__, fe_params.frequency, fe_params.delsys.dvbs.symbol_rate);
+			break;
+		case DSS:
+			fe_params.delsys.dss.symbol_rate = sr;
+			fe_params.delsys.dss.fec = FEC_AUTO;
+			printf("%s: Frequency = %d, Srate = %d\n",
+				__func__, fe_params.frequency, fe_params.delsys.dss.symbol_rate);
+			break;
+		case DVBS2:
+			fe_params.delsys.dvbs2.symbol_rate = sr;
+			fe_params.delsys.dvbs2.fec = FEC_AUTO;
+			printf("%s: Frequency = %d, Srate = %d\n",
+				__func__, fe_params.frequency, fe_params.delsys.dvbs2.symbol_rate);
+			break;
+		default:
+			return -EINVAL;
+		}
+		printf("%s: Frequency = %d, Srate = %d\n\n\n",
+			__func__, fe_params.frequency, fe_params.delsys.dvbs.symbol_rate);
+
+		if (ioctl(fefd, DVBFE_SET_PARAMS, &fe_params) == -1) {
+			perror("DVBFE_SET_PARAMS failed");
+			return FALSE;
+		}
+
+	} else if ((DVB_API_VERSION == 3) && (DVB_API_VERSION_MINOR == 1)){
+		tuneto.frequency = ifreq;
+		tuneto.inversion = INVERSION_AUTO;
+		tuneto.u.qpsk.symbol_rate = sr;
+		tuneto.u.qpsk.fec_inner = FEC_AUTO;
+		if (ioctl(fefd, FE_SET_FRONTEND, &tuneto) == -1) {
+			perror("FE_SET_FRONTEND failed");
+			return FALSE;
+		}
+	}
+	return TRUE;
+}
+
+
+static
+int check_frontend (int fe_fd, int dvr)
+{
+	(void)dvr;
+	fe_status_t status;
+	uint16_t snr, signal;
+	uint32_t ber, uncorrected_blocks;
+	int timeout = 0;
+
+	do {
+		if (ioctl(fe_fd, FE_READ_STATUS, &status) == -1)
+			perror("FE_READ_STATUS failed");
+		/* some frontends might not support all these ioctls, thus we
+		 * avoid printing errors
+		 */
+		if (ioctl(fe_fd, FE_READ_SIGNAL_STRENGTH, &signal) == -1)
+			signal = -2;
+		if (ioctl(fe_fd, FE_READ_SNR, &snr) == -1)
+			snr = -2;
+		if (ioctl(fe_fd, FE_READ_BER, &ber) == -1)
+			ber = -2;
+		if (ioctl(fe_fd, FE_READ_UNCORRECTED_BLOCKS, &uncorrected_blocks) == -1)
+			uncorrected_blocks = -2;
+
+		printf ("status %02x | signal %04x | snr %04x | ber %08x | unc %08x | ",
+			status, signal, snr, ber, uncorrected_blocks);
+
+		if (status & FE_HAS_LOCK)
+			printf("FE_HAS_LOCK");
+		printf("\n");
+
+		if (exit_after_tuning && ((status & FE_HAS_LOCK) || (++timeout >= 10)))
+			break;
+
+		usleep(1000000);
+	} while (1);
+
+	return 0;
+}
+
+
+static
+int zap_to(unsigned int adapter, unsigned int frontend, unsigned int demux,
+	   unsigned int sat_no, unsigned int freq, unsigned int pol,
+	   unsigned int sr, unsigned int vpid, unsigned int apid, int sid,
+	   int dvr, int rec_psi, int bypass, unsigned int delsys)
+{
+	char fedev[128], dmxdev[128], auddev[128];
+	static int fefd, dmxfda, dmxfdv, audiofd = -1, patfd, pmtfd;
+	int pmtpid;
+	uint32_t ifreq;
+	int hiband, result;
+	enum dvbfe_delsys delivery;
+	
+	switch (delsys) {
+	case DVBS:
+		printf("Delivery system=DVB-S\n");
+		delivery = DVBFE_DELSYS_DVBS;	
+		break;
+	case DSS:
+		printf("Delivery system=DSS\n");
+		delivery = DVBFE_DELSYS_DSS;
+		break;
+	case DVBS2:
+		printf("Delivery system=DVB-S2\n");
+		delivery = DVBFE_DELSYS_DVBS2;
+		break;
+	default:
+		printf("Unsupported delivery system\n");
+		return -EINVAL;
+	}
+
+	if (!fefd) {
+		snprintf(fedev, sizeof(fedev), FRONTENDDEVICE, adapter, frontend);
+		snprintf(dmxdev, sizeof(dmxdev), DEMUXDEVICE, adapter, demux);
+		snprintf(auddev, sizeof(auddev), AUDIODEVICE, adapter, demux);
+		printf("using '%s' and '%s'\n", fedev, dmxdev);
+
+		if ((fefd = open(fedev, O_RDWR | O_NONBLOCK)) < 0) {
+			perror("opening frontend failed");
+			return FALSE;
+		}
+		result = ioctl(fefd, DVBFE_SET_DELSYS, &delivery);
+		if (result < 0) {
+			perror("ioctl DVBFE_SET_DELSYS failed");
+			close(fefd);
+			return FALSE;
+		}
+
+		if ((dmxfdv = open(dmxdev, O_RDWR)) < 0) {
+			perror("opening video demux failed");
+			close(fefd);
+			return FALSE;
+		}
+
+		if ((dmxfda = open(dmxdev, O_RDWR)) < 0) {
+			perror("opening audio demux failed");
+			close(fefd);
+			return FALSE;
+		}
+
+		if (dvr == 0)	/* DMX_OUT_DECODER */
+			audiofd = open(auddev, O_RDWR);
+
+		if (rec_psi){
+			if ((patfd = open(dmxdev, O_RDWR)) < 0) {
+				perror("opening pat demux failed");
+				close(audiofd);
+				close(dmxfda);
+				close(dmxfdv);
+				close(fefd);
+				return FALSE;
+			}
+
+			if ((pmtfd = open(dmxdev, O_RDWR)) < 0) {
+				perror("opening pmt demux failed");
+				close(patfd);
+				close(audiofd);
+				close(dmxfda);
+				close(dmxfdv);
+				close(fefd);
+				return FALSE;
+			}
+		}
+	}
+
+	hiband = 0;
+	if (lnb_type.switch_val && lnb_type.high_val &&
+		freq >= lnb_type.switch_val)
+		hiband = 1;
+
+	if (hiband)
+		ifreq = freq - lnb_type.high_val;
+	else {
+		if (freq < lnb_type.low_val)
+			ifreq = lnb_type.low_val - freq;
+	else
+		ifreq = freq - lnb_type.low_val;
+	}
+	result = FALSE;
+
+	if (diseqc(fefd, sat_no, pol, hiband))
+		if (do_tune(fefd, ifreq, sr, delsys))
+			if (set_demux(dmxfdv, vpid, DMX_PES_VIDEO, dvr))
+				if (audiofd >= 0)
+					(void)ioctl(audiofd, AUDIO_SET_BYPASS_MODE, bypass);
+	if (set_demux(dmxfda, apid, DMX_PES_AUDIO, dvr)) {
+		if (rec_psi) {
+			pmtpid = get_pmt_pid(dmxdev, sid);
+			if (pmtpid < 0) {
+				result = FALSE;
+			}
+			if (pmtpid == 0) {
+				fprintf(stderr,"couldn't find pmt-pid for sid %04x\n",sid);
+				result = FALSE;
+			}
+			if (set_demux(patfd, 0, DMX_PES_OTHER, dvr))
+				if (set_demux(pmtfd, pmtpid, DMX_PES_OTHER, dvr))
+					result = TRUE;
+		} else {
+			result = TRUE;
+		}
+	}
+
+	check_frontend (fefd, dvr);
+
+	if (!interactive) {
+		close(patfd);
+		close(pmtfd);
+		if (audiofd >= 0)
+			close(audiofd);
+		close(dmxfda);
+		close(dmxfdv);
+		close(fefd);
+	}
+
+	return result;
+}
+
+
+static int read_channels(const char *filename, int list_channels,
+			 uint32_t chan_no, const char *chan_name,
+			 unsigned int adapter, unsigned int frontend,
+			 unsigned int demux, int dvr, int rec_psi,
+			 int bypass, unsigned int delsys)
+{
+	FILE *cfp;
+	char buf[4096];
+	char inp[256];
+	char *field, *tmp, *p;
+	unsigned int line;
+	unsigned int freq, pol, sat_no, sr, vpid, apid, sid;
+	int ret;
+
+again:
+	line = 0;
+	if (!(cfp = fopen(filename, "r"))) {
+		fprintf(stderr, "error opening channel list '%s': %d %m\n",
+			filename, errno);
+		return FALSE;
+	}
+
+	if (interactive) {
+		fprintf(stderr, "\n>>> ");
+		if (!fgets(inp, sizeof(inp), stdin)) {
+			printf("\n");
+			return -1;
+		}
+		if (inp[0] == '-' && inp[1] == 'n') {
+			chan_no = strtoul(inp+2, NULL, 0);
+			chan_name = NULL;
+			if (!chan_no) {
+				fprintf(stderr, "bad channel number\n");
+				goto again;
+			}
+		} else {
+			p = strchr(inp, '\n');
+			if (p)
+			*p = '\0';
+			chan_name = inp;
+			chan_no = 0;
+		}
+	}
+
+	while (!feof(cfp)) {
+		if (fgets(buf, sizeof(buf), cfp)) {
+			line++;
+
+		if (chan_no && chan_no != line)
+			continue;
+
+		tmp = buf;
+		field = strsep(&tmp, ":");
+
+		if (!field)
+			goto syntax_err;
+
+		if (list_channels) {
+			printf("%03u %s\n", line, field);
+			continue;
+		}
+
+		if (chan_name && strcasecmp(chan_name, field) != 0)
+			continue;
+
+		printf("zapping to %d '%s':\n", line, field);
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		freq = strtoul(field, NULL, 0);
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		pol = (field[0] == 'h' ? 0 : 1);
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		sat_no = strtoul(field, NULL, 0);
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		sr = strtoul(field, NULL, 0) * 1000;
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		vpid = strtoul(field, NULL, 0);
+		if (!vpid)
+			vpid = 0x1fff;
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		p = strchr(field, ';');
+
+		if (p) {
+			*p = '\0';
+			p++;
+			if (bypass) {
+				if (!p || !*p)
+					goto syntax_err;
+				field = p;
+			}
+		}
+
+		apid = strtoul(field, NULL, 0);
+		if (!apid)
+			apid = 0x1fff;
+
+		if (!(field = strsep(&tmp, ":")))
+			goto syntax_err;
+
+		sid = strtoul(field, NULL, 0);
+
+		printf("sat %u, frequency = %u MHz %c, symbolrate %u, "
+		       "vpid = 0x%04x, apid = 0x%04x sid = 0x%04x\n",
+			sat_no, freq, pol ? 'V' : 'H', sr, vpid, apid, sid);
+
+		fclose(cfp);
+
+		ret = zap_to(adapter, frontend, demux, sat_no, freq * 1000,
+			     pol, sr, vpid, apid, sid, dvr, rec_psi, bypass, delsys);
+		if (interactive)
+			goto again;
+
+		if (ret)
+			return TRUE;
+
+		return FALSE;
+
+syntax_err:
+		fprintf(stderr, "syntax error in line %u: '%s'\n", line, buf);
+	} else if (ferror(cfp)) {
+		fprintf(stderr, "error reading channel list '%s': %d %m\n",
+		filename, errno);
+		fclose(cfp);
+		return FALSE;
+	} else
+		break;
+	}
+
+	fclose(cfp);
+
+	if (!list_channels) {
+		fprintf(stderr, "channel not found\n");
+
+	if (!interactive)
+		return FALSE;
+	}
+	if (interactive)
+		goto again;
+
+	return TRUE;
+}
+
+
+void
+bad_usage(char *pname, int prlnb)
+{
+	int i;
+	struct lnb_types_st *lnbp;
+	char **cp;
+
+	if (!prlnb) {
+		fprintf (stderr, usage_str, pname);
+	} else {
+		i = 0;
+		fprintf(stderr, "-l <lnb-type> or -l low[,high[,switch]] in Mhz\nwhere <lnb-type> is:\n");
+		while(NULL != (lnbp = lnb_enum(i))) {
+			fprintf (stderr, "%s\n", lnbp->name);
+			for (cp = lnbp->desc; *cp ; cp++) {
+				fprintf (stderr, "   %s\n", *cp);
+			}
+			i++;
+		}
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	const char *home;
+	char chanfile[2 * PATH_MAX];
+	int list_channels = 0;
+	unsigned int chan_no = 0;
+	const char *chan_name = NULL;
+	unsigned int adapter = 0, frontend = 0, demux = 0, dvr = 0, rec_psi = 0, delsys = 0;
+	int bypass = 0;
+	int opt, copt = 0;
+
+	lnb_type = *lnb_enum(0);
+	while ((opt = getopt(argc, argv, "hqrpn:a:f:d:t:c:l:xib")) != -1) {
+		switch (opt) {
+		case '?':
+		case 'h':
+		default:
+			bad_usage(argv[0], 0);
+		case 'b':
+			bypass = 1;
+			break;
+		case 'q':
+			list_channels = 1;
+			break;
+		case 'r':
+			dvr = 1;
+			break;
+		case 'n':
+			chan_no = strtoul(optarg, NULL, 0);
+			break;
+		case 'a':
+			adapter = strtoul(optarg, NULL, 0);
+			break;
+		case 'f':
+			frontend = strtoul(optarg, NULL, 0);
+			break;
+		case 'p':
+			rec_psi = 1;
+			break;
+		case 'd':
+			demux = strtoul(optarg, NULL, 0);
+			break;
+		case 't':
+			delsys = strtoul(optarg, NULL, 0);
+			break;
+		case 'c':
+			copt = 1;
+			strncpy(chanfile, optarg, sizeof(chanfile));
+			break;
+		case 'l':
+			if (lnb_decode(optarg, &lnb_type) < 0) {
+				bad_usage(argv[0], 1);
+				return -1;
+			}
+			break;
+		case 'x':
+			exit_after_tuning = 1;
+			break;
+		case 'i':
+			interactive = 1;
+			exit_after_tuning = 1;
+		}
+	}
+	lnb_type.low_val *= 1000;	/* convert to kiloherz */
+	lnb_type.high_val *= 1000;	/* convert to kiloherz */
+	lnb_type.switch_val *= 1000;	/* convert to kiloherz */
+	if (optind < argc)
+		chan_name = argv[optind];
+	if (chan_name && chan_no) {
+		bad_usage(argv[0], 0);
+		return -1;
+	}
+	if (list_channels && (chan_name || chan_no)) {
+		bad_usage(argv[0], 0);
+		return -1;
+	}
+	if (!list_channels && !chan_name && !chan_no && !interactive) {
+		bad_usage(argv[0], 0);
+		return -1;
+	}
+
+	if (!copt) {
+		if (!(home = getenv("HOME"))) {
+			fprintf(stderr, "error: $HOME not set\n");
+		return TRUE;
+	}
+	snprintf(chanfile, sizeof(chanfile),
+		"%s/.szap/%i/%s", home, adapter, CHANNEL_FILE);
+	if (access(chanfile, R_OK))
+		snprintf(chanfile, sizeof(chanfile),
+			 "%s/.szap/%s", home, CHANNEL_FILE);
+	}
+
+	printf("reading channels from file '%s'\n", chanfile);
+
+	if (rec_psi)
+		dvr=1;
+
+	if (!read_channels(chanfile, list_channels, chan_no, chan_name,
+	    adapter, frontend, demux, dvr, rec_psi, bypass, delsys))
+
+		return TRUE;
+
+	return FALSE;
+}