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gpsmon.c
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/*
* The generic GPS packet monitor.
*
* This file is Copyright (c) 2010 by the GPSD project
* SPDX-License-Identifier: BSD-2-clause
*/
/* for vsnprintf() FreeBSD wants __ISO_C_VISIBLE >= 1999 */
#define __ISO_C_VISIBLE 1999
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <ctype.h>
#include <assert.h>
#include <setjmp.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <time.h>
#include <math.h>
#include <sys/time.h> /* expected to declare select(2) a la SuS */
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <fcntl.h>
#include <unistd.h>
#include "gpsd.h"
#include "gps_json.h"
#include "gpsmon.h"
#include "gpsdclient.h"
#include "revision.h"
#include "strfuncs.h"
#include "timespec.h"
#define BUFLEN 2048
/* needed under FreeBSD */
#ifndef HOST_NAME_MAX
#define HOST_NAME_MAX 255
#endif /* HOST_NAME_MAX */
/* external capability tables */
extern struct monitor_object_t nmea_mmt, sirf_mmt, ashtech_mmt;
extern struct monitor_object_t garmin_mmt, garmin_bin_ser_mmt;
extern struct monitor_object_t italk_mmt, ubx_mmt, superstar2_mmt;
extern struct monitor_object_t fv18_mmt, gpsclock_mmt, mtk3301_mmt;
extern struct monitor_object_t oncore_mmt, tnt_mmt, aivdm_mmt;
#ifdef NMEA0183_ENABLE
extern const struct gps_type_t driver_nmea0183;
#endif /* NMEA0183_ENABLE */
/* These are public */
struct gps_device_t session;
WINDOW *devicewin;
bool serial;
/* These are private */
static struct gps_context_t context;
static bool curses_active;
static WINDOW *statwin, *cmdwin;
static WINDOW *packetwin;
static FILE *logfile;
static char *type_name;
static size_t promptlen = 0;
static struct termios cooked, rare;
static struct fixsource_t source;
static char hostname[HOST_NAME_MAX];
#ifdef NTP_ENABLE
static struct timedelta_t time_offset;
#endif /* NTP_ENABLE */
#ifdef PASSTHROUGH_ENABLE
/* no methods, it's all device window */
extern const struct gps_type_t driver_json_passthrough;
const struct monitor_object_t json_mmt = {
.initialize = NULL,
.update = NULL,
.command = NULL,
.wrap = NULL,
.min_y = 0, .min_x = 80, /* no need for a device window */
.driver = &driver_json_passthrough,
};
#endif /* PASSTHROUGH_ENABLE */
static const struct monitor_object_t *monitor_objects[] = {
#ifdef NMEA0183_ENABLE
&nmea_mmt,
#if defined(GARMIN_ENABLE) && defined(NMEA0183_ENABLE)
&garmin_mmt,
#endif /* GARMIN_ENABLE && NMEA0183_ENABLE */
#if defined(GARMIN_ENABLE) && defined(BINARY_ENABLE)
&garmin_bin_ser_mmt,
#endif /* defined(GARMIN_ENABLE) && defined(BINARY_ENABLE) */
#ifdef ASHTECH_ENABLE
&ashtech_mmt,
#endif /* ASHTECH_ENABLE */
#ifdef FV18_ENABLE
&fv18_mmt,
#endif /* FV18_ENABLE */
#ifdef GPSCLOCK_ENABLE
&gpsclock_mmt,
#endif /* GPSCLOCK_ENABLE */
#ifdef MTK3301_ENABLE
&mtk3301_mmt,
#endif /* MTK3301_ENABLE */
#ifdef AIVDM_ENABLE
&aivdm_mmt,
#endif /* AIVDM_ENABLE */
#endif /* NMEA0183_ENABLE */
#if defined(SIRF_ENABLE) && defined(BINARY_ENABLE)
&sirf_mmt,
#endif /* defined(SIRF_ENABLE) && defined(BINARY_ENABLE) */
#if defined(UBLOX_ENABLE) && defined(BINARY_ENABLE)
&ubx_mmt,
#endif /* defined(UBLOX_ENABLE) && defined(BINARY_ENABLE) */
#if defined(ITRAX_ENABLE) && defined(BINARY_ENABLE)
&italk_mmt,
#endif /* defined(ITALK_ENABLE) && defined(BINARY_ENABLE) */
#if defined(SUPERSTAR2_ENABLE) && defined(BINARY_ENABLE)
&superstar2_mmt,
#endif /* defined(SUPERSTAR2_ENABLE) && defined(BINARY_ENABLE) */
#if defined(ONCORE_ENABLE) && defined(BINARY_ENABLE)
&oncore_mmt,
#endif /* defined(ONCORE_ENABLE) && defined(BINARY_ENABLE) */
#ifdef TNT_ENABLE
&tnt_mmt,
#endif /* TNT_ENABLE */
#ifdef PASSTHROUGH_ENABLE
&json_mmt,
#endif /* PASSTHROUGH_ENABLE */
NULL,
};
static const struct monitor_object_t **active;
static const struct gps_type_t *fallback;
static jmp_buf terminate;
#define display (void)mvwprintw
/* termination codes */
#define TERM_SELECT_FAILED 1
#define TERM_DRIVER_SWITCH 2
#define TERM_EMPTY_READ 3
#define TERM_READ_ERROR 4
#define TERM_SIGNAL 5
#define TERM_QUIT 6
/* PPS monitoring */
#if defined(PPS_ENABLE)
static inline void report_lock(void)
{
gpsd_acquire_reporting_lock();
}
static inline void report_unlock(void)
{
gpsd_release_reporting_lock();
}
#else
static inline void report_lock(void) { }
static inline void report_unlock(void) { }
#endif /* PPS_ENABLE */
#define PPSBAR "-------------------------------------" \
" PPS " \
"-------------------------------------\n"
/* Dummy conditional for *display* of (possibly remote) PPS events */
#define PPS_DISPLAY_ENABLE 1
/******************************************************************************
*
* Visualization helpers
*
******************************************************************************/
#ifdef PPS_ENABLE
static void visibilize(char *buf2, size_t len2, const char *buf)
/* string is mostly printable, dress up the nonprintables a bit */
{
const char *sp;
buf2[0] = '\0';
for (sp = buf; *sp != '\0' && strlen(buf2)+4 < len2; sp++)
if (isprint((unsigned char) *sp) || (sp[0] == '\n' && sp[1] == '\0')
|| (sp[0] == '\r' && sp[2] == '\0'))
(void)snprintf(buf2 + strlen(buf2), 2, "%c", *sp);
else
(void)snprintf(buf2 + strlen(buf2), 6, "\\x%02x",
(unsigned)(*sp & 0xff));
}
#endif /* PPS_ENABLE */
static void cond_hexdump(char *buf2, size_t len2,
const char *buf, size_t len)
/* pass through visibilized if all printable, hexdump otherwise */
{
size_t i;
bool printable = true;
for (i = 0; i < len; i++)
if (!isprint((unsigned char) buf[i]) && !isspace((unsigned char) buf[i]))
printable = false;
if (printable) {
size_t j;
for (i = j = 0; i < len && j < len2 - 1; i++)
if (isprint((unsigned char) buf[i])) {
buf2[j++] = buf[i];
buf2[j] = '\0';
}
else {
if (TEXTUAL_PACKET_TYPE(session.lexer.type)) {
if (i == len - 1 && buf[i] == '\n')
continue;
if (i == len - 2 && buf[i] == '\r')
continue;
}
(void)snprintf(&buf2[j], len2-strlen(buf2), "\\x%02x", (unsigned int)(buf[i] & 0xff));
j = strlen(buf2);
}
} else {
buf2[0] = '\0';
for (i = 0; i < len; i++)
str_appendf(buf2, len2, "%02x", (unsigned int)(buf[i] & 0xff));
}
}
#ifdef NTP_ENABLE
void toff_update(WINDOW *win, int y, int x)
{
assert(win != NULL);
if (time_offset.real.tv_sec != 0)
{
/* NOTE: can not use double here due to precision requirements */
struct timespec timedelta;
int i, ymax, xmax;
getmaxyx(win, ymax, xmax);
assert(ymax > 0); /* squash a compiler warning */
(void)wmove(win, y, x);
/*
* The magic number shortening the field works because
* we know we'll never see more than 5 digits of seconds
* rather than 10.
*/
for (i = 0; i < TIMESPEC_LEN-4 && x + i < xmax - 1; i++)
(void)waddch(win, ' ');
TS_SUB(&timedelta, &time_offset.clock, &time_offset.real);
if ( 86400 < (long)labs(timedelta.tv_sec) ) {
/* more than one day off, overflow */
/* need a bigger field to show it */
(void)mvwaddstr(win, y, x, "> 1 day");
} else {
char buf[TIMESPEC_LEN];
timespec_str(&timedelta, buf, sizeof(buf));
(void)mvwaddstr(win, y, x, buf);
}
}
}
#endif /* NTP_ENABLE */
/* FIXME: Decouple this reporting from local PPS monitoring. */
#ifdef PPS_ENABLE
void pps_update(WINDOW *win, int y, int x)
{
struct timedelta_t ppstimes;
assert(win != NULL);
if (pps_thread_ppsout(&session.pps_thread, &ppstimes) > 0) {
/* NOTE: can not use double here due to precision requirements */
struct timespec timedelta;
int i, ymax, xmax;
getmaxyx(win, ymax, xmax);
assert(ymax > 0); /* squash a compiler warning */
(void)wmove(win, y, x);
/* see toff_update() for explanation of the magic number */
for (i = 0; i < TIMESPEC_LEN-4 && x + i < xmax - 1; i++)
(void)waddch(win, ' ');
TS_SUB( &timedelta, &ppstimes.clock, &ppstimes.real);
if ( 86400 < (long)labs(timedelta.tv_sec) ) {
/* more than one day off, overflow */
/* need a bigger field to show it */
(void)mvwaddstr(win, y, x, "> 1 day");
} else {
char buf[TIMESPEC_LEN];
timespec_str(&timedelta, buf, sizeof(buf));
(void)mvwaddstr(win, y, x, buf);
}
(void)wnoutrefresh(win);
}
}
#endif /* PPS_ENABLE */
/******************************************************************************
*
* Curses I/O
*
******************************************************************************/
void monitor_fixframe(WINDOW * win)
{
int ymax, xmax, ycur, xcur;
assert(win != NULL);
getyx(win, ycur, xcur);
getmaxyx(win, ymax, xmax);
assert(xcur > -1 && ymax > 0); /* squash a compiler warning */
(void)mvwaddch(win, ycur, xmax - 1, ACS_VLINE);
}
#if defined(CONTROLSEND_ENABLE) || defined(RECONFIGURE_ENABLE)
static void packet_dump(const char *buf, size_t buflen)
{
if (packetwin != NULL) {
char buf2[buflen * 2];
cond_hexdump(buf2, buflen * 2, buf, buflen);
(void)waddstr(packetwin, buf2);
(void)waddch(packetwin, (chtype)'\n');
}
}
static void monitor_dump_send(const char *buf, size_t len)
{
if (packetwin != NULL) {
report_lock();
(void)wattrset(packetwin, A_BOLD);
(void)wprintw(packetwin, ">>>");
packet_dump(buf, len);
(void)wattrset(packetwin, A_NORMAL);
report_unlock();
}
}
#endif /* defined(CONTROLSEND_ENABLE) || defined(RECONFIGURE_ENABLE) */
static void gpsmon_report(const char *buf)
/* log to the packet window if curses is up, otherwise stdout */
{
/* report locking is left to caller */
if (!curses_active)
(void)fputs(buf, stdout);
else if (packetwin != NULL)
(void)waddstr(packetwin, buf);
if (logfile != NULL)
(void)fputs(buf, logfile);
}
#ifdef PPS_ENABLE
static void packet_vlog(char *buf, size_t len, const char *fmt, va_list ap)
{
char buf2[BUFSIZ];
visibilize(buf2, sizeof(buf2), buf);
report_lock();
(void)vsnprintf(buf2 + strlen(buf2), len, fmt, ap);
gpsmon_report(buf2);
report_unlock();
}
#endif /* PPS_ENABLE */
#ifdef RECONFIGURE_ENABLE
static void announce_log(const char *fmt, ...)
{
char buf[BUFSIZ];
va_list ap;
va_start(ap, fmt);
(void)vsnprintf(buf, sizeof(buf) - 5, fmt, ap);
va_end(ap);
if (packetwin != NULL) {
report_lock();
(void)wattrset(packetwin, A_BOLD);
(void)wprintw(packetwin, ">>>");
(void)waddstr(packetwin, buf);
(void)wattrset(packetwin, A_NORMAL);
(void)wprintw(packetwin, "\n");
report_unlock();
}
if (logfile != NULL) {
(void)fprintf(logfile, ">>>%s\n", buf);
}
}
#endif /* RECONFIGURE_ENABLE */
static void monitor_vcomplain(const char *fmt, va_list ap)
{
assert(cmdwin!=NULL);
(void)wmove(cmdwin, 0, (int)promptlen);
(void)wclrtoeol(cmdwin);
(void)wattrset(cmdwin, A_BOLD);
(void)vwprintw(cmdwin, (char *)fmt, ap);
(void)wattrset(cmdwin, A_NORMAL);
(void)wrefresh(cmdwin);
(void)doupdate();
(void)wgetch(cmdwin);
(void)wmove(cmdwin, 0, (int)promptlen);
(void)wclrtoeol(cmdwin);
(void)wrefresh(cmdwin);
(void)wmove(cmdwin, 0, (int)promptlen);
(void)doupdate();
}
void monitor_complain(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
monitor_vcomplain(fmt, ap);
va_end(ap);
}
void monitor_log(const char *fmt, ...)
{
if (packetwin != NULL) {
va_list ap;
report_lock();
va_start(ap, fmt);
(void)vwprintw(packetwin, (char *)fmt, ap);
va_end(ap);
report_unlock();
}
}
static const char *promptgen(void)
{
static char buf[256];
if (serial)
(void)snprintf(buf, sizeof(buf),
"%s:%s %u %u%c%u",
hostname,
session.gpsdata.dev.path,
session.gpsdata.dev.baudrate,
9 - session.gpsdata.dev.stopbits,
session.gpsdata.dev.parity,
session.gpsdata.dev.stopbits);
else {
(void)strlcpy(buf, session.gpsdata.dev.path, sizeof(buf));
if (source.device != NULL) {
(void) strlcat(buf, ":", sizeof(buf));
(void) strlcat(buf, source.device, sizeof(buf));
}
}
return buf;
}
static void refresh_statwin(void)
/* refresh the device-identification window */
{
/* *INDENT-OFF* */
type_name =
session.device_type ? session.device_type->type_name : "Unknown device";
/* *INDENT-ON* */
(void)wclear(statwin);
(void)wattrset(statwin, A_BOLD);
(void)mvwaddstr(statwin, 0, 0, promptgen());
(void)wattrset(statwin, A_NORMAL);
(void)wnoutrefresh(statwin);
}
static void refresh_cmdwin(void)
/* refresh the command window */
{
(void)wmove(cmdwin, 0, 0);
(void)wprintw(cmdwin, type_name);
promptlen = strlen(type_name);
if (fallback != NULL && strcmp(fallback->type_name, type_name) != 0) {
(void)waddch(cmdwin, (chtype)' ');
(void)waddch(cmdwin, (chtype)'(');
(void)waddstr(cmdwin, fallback->type_name);
(void)waddch(cmdwin, (chtype)')');
promptlen += strlen(fallback->type_name) + 3;
}
(void)wprintw(cmdwin, "> ");
promptlen += 2;
(void)wclrtoeol(cmdwin);
(void)wnoutrefresh(cmdwin);
}
static bool curses_init(void)
{
(void)initscr();
(void)cbreak();
(void)intrflush(stdscr, FALSE);
(void)keypad(stdscr, true);
(void)clearok(stdscr, true);
(void)clear();
(void)noecho();
curses_active = true;
#define CMDWINHEIGHT 1
statwin = newwin(CMDWINHEIGHT, 30, 0, 0);
cmdwin = newwin(CMDWINHEIGHT, 0, 0, 30);
packetwin = newwin(0, 0, CMDWINHEIGHT, 0);
if (statwin == NULL || cmdwin == NULL || packetwin == NULL)
return false;
(void)scrollok(packetwin, true);
(void)wsetscrreg(packetwin, 0, LINES - CMDWINHEIGHT);
(void)wmove(packetwin, 0, 0);
refresh_statwin();
refresh_cmdwin();
return true;
}
static bool switch_type(const struct gps_type_t *devtype)
{
const struct monitor_object_t **trial, **newobject;
newobject = NULL;
for (trial = monitor_objects; *trial; trial++) {
if (strcmp((*trial)->driver->type_name, devtype->type_name)==0) {
newobject = trial;
break;
}
}
if (newobject) {
if (LINES < (*newobject)->min_y + 1 || COLS < (*newobject)->min_x) {
monitor_complain("%s requires %dx%d screen",
(*newobject)->driver->type_name,
(*newobject)->min_x, (*newobject)->min_y + 1);
} else {
int leftover;
if (active != NULL) {
if ((*active)->wrap != NULL)
(*active)->wrap();
(void)delwin(devicewin);
}
active = newobject;
if (devicewin)
delwin(devicewin);
devicewin = newwin((*active)->min_y, (*active)->min_x, 1, 0);
/* screen might have JSON on it from the init sequence */
(void)clearok(stdscr, true);
(void)clear();
if ((devicewin == NULL) || ((*active)->initialize != NULL && !(*active)->initialize())) {
monitor_complain("Internal initialization failure - screen "
"must be at least 80x24. Aborting.");
return false;
}
leftover = LINES - 1 - (*active)->min_y;
report_lock();
if (leftover <= 0) {
if (packetwin != NULL)
(void)delwin(packetwin);
packetwin = NULL;
} else if (packetwin == NULL) {
packetwin = newwin(leftover, COLS, (*active)->min_y + 1, 0);
(void)scrollok(packetwin, true);
(void)wsetscrreg(packetwin, 0, leftover - 1);
} else {
(void)wresize(packetwin, leftover, COLS);
(void)mvwin(packetwin, (*active)->min_y + 1, 0);
(void)wsetscrreg(packetwin, 0, leftover - 1);
}
report_unlock();
}
return true;
}
monitor_complain("No monitor matches %s.", devtype->type_name);
return false;
}
static void select_packet_monitor(struct gps_device_t *device)
{
static int last_type = BAD_PACKET;
/*
* Switch display types on packet receipt. Note, this *doesn't*
* change the selection of the current device driver; that's done
* within gpsd_multipoll() before this hook is called.
*/
if (device->lexer.type != last_type) {
const struct gps_type_t *active_type = device->device_type;
#ifdef NMEA0183_ENABLE
if (device->lexer.type == NMEA_PACKET
&& ((device->device_type->flags & DRIVER_STICKY) != 0))
active_type = &driver_nmea0183;
#endif /* NMEA0183_ENABLE */
if (!switch_type(active_type))
longjmp(terminate, TERM_DRIVER_SWITCH);
else {
refresh_statwin();
refresh_cmdwin();
}
last_type = device->lexer.type;
}
if (active != NULL
&& device->lexer.outbuflen > 0
&& (*active)->update != NULL)
(*active)->update();
if (devicewin != NULL)
(void)wnoutrefresh(devicewin);
}
/* Control-L character */
#define CTRL_L 0x0C
static char *curses_get_command(void)
/* char-by-char nonblocking input, return accumulated command line on \n */
{
static char input[80];
static char line[80];
int c;
c = wgetch(cmdwin);
if (CTRL_L == c) {
/* ^L is to repaint the screen */
(void)clearok(stdscr, true);
if (active != NULL && (*active)->initialize != NULL)
(void)(*active)->initialize();
} else if (c != '\r' && c != '\n') {
size_t len = strlen(input);
if (c == '\b' || c == KEY_LEFT || c == (int)erasechar()) {
input[len--] = '\0';
} else if (isprint(c)) {
input[len] = (char)c;
input[++len] = '\0';
(void)waddch(cmdwin, (chtype)c);
(void)wrefresh(cmdwin);
(void)doupdate();
}
return NULL;
}
(void)wmove(cmdwin, 0, (int)promptlen);
(void)wclrtoeol(cmdwin);
(void)wrefresh(cmdwin);
(void)doupdate();
/* user finished entering a command */
if (input[0] == '\0')
return NULL;
else {
(void) strlcpy(line, input, sizeof(line));
input[0] = '\0';
}
/* handle it in the currently selected monitor object if possible */
if (serial && active != NULL && (*active)->command != NULL) {
int status = (*active)->command(line);
if (status == COMMAND_TERMINATE)
longjmp(terminate, TERM_QUIT);
else if (status == COMMAND_MATCH)
return NULL;
assert(status == COMMAND_UNKNOWN);
}
return line;
}
/******************************************************************************
*
* Mode-independent I/O
*
* Below this line, all calls to curses-dependent functions are guarded
* by curses_active and have ttylike alternatives.
*
******************************************************************************/
#ifdef PPS_ENABLE
static void packet_log(const char *fmt, ...)
{
char buf[BUFSIZ];
va_list ap;
buf[0] = '\0';
va_start(ap, fmt);
packet_vlog(buf, sizeof(buf), fmt, ap);
va_end(ap);
}
#endif /* PPS_ENABLE */
static ssize_t gpsmon_serial_write(struct gps_device_t *session,
const char *buf,
const size_t len)
/* pass low-level data to devices, echoing it to the log window */
{
#if defined(CONTROLSEND_ENABLE) || defined(RECONFIGURE_ENABLE)
monitor_dump_send((const char *)buf, len);
#endif /* defined(CONTROLSEND_ENABLE) || defined(RECONFIGURE_ENABLE) */
return gpsd_serial_write(session, buf, len);
}
#ifdef CONTROLSEND_ENABLE
bool monitor_control_send( unsigned char *buf, size_t len)
{
if (!serial)
return false;
else {
ssize_t st;
context.readonly = false;
st = session.device_type->control_send(&session, (char *)buf, len);
context.readonly = true;
return (st != -1);
}
}
static bool monitor_raw_send( unsigned char *buf, size_t len)
{
ssize_t st = gpsd_write(&session, (char *)buf, len);
return (st > 0 && (size_t) st == len);
}
#endif /* CONTROLSEND_ENABLE */
static void complain(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
if (curses_active)
monitor_vcomplain(fmt, ap);
else {
(void)vfprintf(stderr, fmt, ap);
(void)fputc('\n', stderr);
}
va_end(ap);
}
/*****************************************************************************
*
* Main sequence
*
*****************************************************************************/
static void gpsmon_hook(struct gps_device_t *device, gps_mask_t changed UNUSED)
/* per-packet hook */
{
char buf[BUFSIZ];
/* FIXME: If the following condition is false, the display is screwed up. */
#if defined(SOCKET_EXPORT_ENABLE) && defined(PPS_DISPLAY_ENABLE)
if (!serial && str_starts_with((char*)device->lexer.outbuffer, "{\"class\":\"TOFF\",")) {
const char *end = NULL;
int status = json_toff_read((const char *)device->lexer.outbuffer,
&session.gpsdata,
&end);
if (status != 0) {
complain("Ill-formed TOFF packet: %d (%s)", status, json_error_string(status));
return;
} else {
if (!curses_active)
(void)fprintf(stderr,
"TOFF=%ld.%09ld real=%ld.%09ld\n",
(long)session.gpsdata.toff.clock.tv_sec,
(long)session.gpsdata.toff.clock.tv_nsec,
(long)session.gpsdata.toff.real.tv_sec,
(long)session.gpsdata.toff.real.tv_nsec);
#ifdef NTP_ENABLE
time_offset = session.gpsdata.toff;
#endif /* NTP_ENABLE */
return;
}
} else if (!serial && str_starts_with((char*)device->lexer.outbuffer, "{\"class\":\"PPS\",")) {
const char *end = NULL;
struct gps_data_t noclobber;
int status = json_pps_read((const char *)device->lexer.outbuffer,
&noclobber,
&end);
if (status != 0) {
complain("Ill-formed PPS packet: %d (%s)", status, json_error_string(status));
return;
} else {
struct timespec timedelta;
char timedelta_str[TIMESPEC_LEN];
TS_SUB( &timedelta, &noclobber.pps.clock, &noclobber.pps.real);
timespec_str( &timedelta, timedelta_str, sizeof(timedelta_str) );
if (!curses_active) {
char pps_clock_str[TIMESPEC_LEN];
char pps_real_str[TIMESPEC_LEN];
timespec_str( &noclobber.pps.clock, pps_clock_str,
sizeof(pps_clock_str) );
timespec_str( &noclobber.pps.real, pps_real_str,
sizeof(pps_real_str) );
(void)fprintf(stderr,
"PPS=%.20s clock=%.20s offset=%.20s\n",
pps_clock_str,
pps_real_str,
timedelta_str);
}
(void)snprintf(buf, sizeof(buf),
"------------------- PPS offset: %.20s ------\n",
timedelta_str);
/* FIXME: Decouple this from the pps_thread code. */
#ifdef PPS_ENABLE
/*
* In direct mode this would be a bad idea, but we're not actually
* watching for handshake events on a spawned thread here.
*/
/* coverity[missing_lock] */
session.pps_thread.pps_out = noclobber.pps;
/* coverity[missing_lock] */
session.pps_thread.ppsout_count++;
#endif /* PPS_ENABLE */
}
}
else
#endif /* SOCKET_EXPORT_ENABLE && PPS_DISPLAY_ENABLE */
{
#ifdef __future__
if (!serial)
{
if (device->lexer.type == JSON_PACKET)
{
const char *end = NULL;
libgps_json_unpack((char *)device->lexer.outbuffer, &session.gpsdata, &end);
}
}
#endif /* __future__ */
if (curses_active)
select_packet_monitor(device);
(void)snprintf(buf, sizeof(buf), "(%d) ",
(int)device->lexer.outbuflen);
cond_hexdump(buf + strlen(buf), sizeof(buf) - strlen(buf),
(char *)device->lexer.outbuffer,device->lexer.outbuflen);
(void)strlcat(buf, "\n", sizeof(buf));
}
report_lock();
if (!curses_active)
(void)fputs(buf, stdout);
else {
if (packetwin != NULL) {
(void)waddstr(packetwin, buf);
(void)wnoutrefresh(packetwin);
}
(void)doupdate();
}
if (logfile != NULL && device->lexer.outbuflen > 0) {
UNUSED size_t written_count = fwrite
(device->lexer.outbuffer, sizeof(char),
device->lexer.outbuflen, logfile);
assert(written_count >= 1);
}
report_unlock();
#ifdef NTP_ENABLE
/* Update the last fix time seen for PPS if we've actually seen one,
* and it is a new second. */
if ( 0 != isnan(device->newdata.time)) {
// "NTP: bad new time
#if defined(PPS_ENABLE)
} else if (device->newdata.time <= device->pps_thread.fix_in.real.tv_sec) {
// "NTP: Not a new time
#endif /* PPS_ENABLE */
} else
ntp_latch(device, &time_offset);
#endif /* NTP_ENABLE */
}
static bool do_command(const char *line)
{
#ifdef RECONFIGURE_ENABLE
unsigned int v;
struct timespec delay;
#endif /* RECONFIGURE_ENABLE */
#ifdef CONTROLSEND_ENABLE
unsigned char buf[BUFLEN];
#endif /* CONTROLSEND_ENABLE */
const char *arg;
if (isspace((unsigned char) line[1])) {
for (arg = line + 2; *arg != '\0' && isspace((unsigned char) *arg); arg++)
arg++;
arg++;
} else
arg = line + 1;
switch (line[0]) {
#ifdef RECONFIGURE_ENABLE
case 'c': /* change cycle time */
if (session.device_type == NULL)
complain("No device defined yet");
else if (!serial)
complain("Only available in low-level mode.");
else {
double rate = strtod(arg, NULL);
const struct gps_type_t *switcher = session.device_type;
if (fallback != NULL && fallback->rate_switcher != NULL)
switcher = fallback;
if (switcher->rate_switcher != NULL) {
/* *INDENT-OFF* */
context.readonly = false;
if (switcher->rate_switcher(&session, rate)) {
announce_log("[Rate switcher called.]");
} else
complain("Rate not supported.");
context.readonly = true;
/* *INDENT-ON* */
} else
complain
("Device type %s has no rate switcher",
switcher->type_name);
}
#endif /* RECONFIGURE_ENABLE */
break;
case 'i': /* start probing for subtype */
if (session.device_type == NULL)
complain("No GPS type detected.");
else if (!serial)
complain("Only available in low-level mode.");
else {
if (strcspn(line, "01") == strlen(line))
context.readonly = !context.readonly;
else
context.readonly = (atoi(line + 1) == 0);
#ifdef RECONFIGURE_ENABLE
announce_log("[probing %sabled]", context.readonly ? "dis" : "en");
#endif /* RECONFIGURE_ENABLE */
if (!context.readonly)
/* magic - forces a reconfigure */
session.lexer.counter = 0;
}
break;
case 'l': /* open logfile */
report_lock();
if (logfile != NULL) {
if (packetwin != NULL)
(void)wprintw(packetwin,
">>> Logging off\n");
(void)fclose(logfile);
}
if ((logfile = fopen(line + 1, "a")) != NULL)
if (packetwin != NULL)
(void)wprintw(packetwin,
">>> Logging to %s\n", line + 1);
report_unlock();
break;
#ifdef RECONFIGURE_ENABLE
case 'n': /* change mode */
/* if argument not specified, toggle */
if (strcspn(line, "01") == strlen(line)) {
/* *INDENT-OFF* */
v = (unsigned int)TEXTUAL_PACKET_TYPE(
session.lexer.type);
/* *INDENT-ON* */
} else
v = (unsigned)atoi(line + 1);
if (session.device_type == NULL)
complain("No device defined yet");
else if (!serial)
complain("Only available in low-level mode.");
else {
const struct gps_type_t *switcher = session.device_type;
if (fallback != NULL && fallback->mode_switcher != NULL)
switcher = fallback;
if (switcher->mode_switcher != NULL) {
context.readonly = false;
announce_log("[Mode switcher to mode %d]", v);
switcher->mode_switcher(&session, (int)v);
context.readonly = true;
(void)tcdrain(session.gpsdata.gps_fd);
/* wait 50,000 uSec */
delay.tv_sec = 0;
delay.tv_nsec = 50000000L;
nanosleep(&delay, NULL);
/*
* Session device change will be set to NMEA when
* gpsmon resyncs. So stash the current type to
* be restored if we do 'n' from NMEA mode.
*/
if (v == 0)
fallback = switcher;
} else
complain
("Device type %s has no mode switcher",
switcher->type_name);
}
break;
#endif /* RECONFIGURE_ENABLE */
case 'q': /* quit */