void handleClientRequest(int i)
{
ssize_t r;
char * p;
size_t remain;
if (stream[i].len >= sizeof(stream[i].buffer) - 2)
{
logAbort("Input line on stream %d too long: %s\n", i, stream[i].buffer);
}
remain = sizeof(stream[i].buffer) - stream[i].len - 2;
logDebug("handleClientRequest: read i=%d\n", i);
logDebug("read %s i=%d fd=%d len=%u remain=%u\n", streamTypeName[stream[i].type], i, stream[i].fd, stream[i].len, remain);
r = read(stream[i].fd, stream[i].buffer + stream[i].len, remain);
if (r <= 0)
{
logDebug("read %s i=%d fd=%d r=%d\n", streamTypeName[stream[i].type], i, stream[i].fd, r);
if (stream[i].type == DATA_INPUT_STREAM)
{
logAbort("EOF on reading stdin\n");
}
closeStream(i);
return;
}
stream[i].len += r;
stream[i].buffer[stream[i].len] = 0;
while (stream[i].len > 0)
{
size_t len;
p = strchr(stream[i].buffer, '\n');
if (!p)
{
break;
}
len = p - stream[i].buffer;
sbAppendData(&tcpMessage, stream[i].buffer, len + 1);
if (stream[i].type != DATA_INPUT_STREAM || stream[outputIdx].type == DATA_OUTPUT_COPY)
{
/* Send all TCP client input and the main stdin stream if the mode is -o */
/* directly to stdout */
sbAppendData(&outMessage, stream[i].buffer, len + 1);
}
*p = 0;
if (storeMessage(stream[i].buffer, len))
{
convertJSONToNMEA0183(&nmeaMessage, stream[i].buffer);
}
p++, len++;
stream[i].len -= len;
/* Now remove [buffer..p> == the entire line */
memmove(stream[i].buffer, p, stream[i].len + 1);
}
}
static enum ReadyDescriptor isready(int fd1, int fd2)
{
fd_set fds;
struct timeval waitfor;
int setsize;
int r;
enum ReadyDescriptor ret = 0;
FD_ZERO(&fds);
if (fd1 >= 0)
{
FD_SET(fd1, &fds);
}
if (fd2 >= 0)
{
FD_SET(fd2, &fds);
}
waitfor.tv_sec = timeout ? timeout : 10;
waitfor.tv_usec = 0;
if (fd1 > fd2)
{
setsize = fd1 + 1;
}
else
{
setsize = fd2 + 1;
}
r = select(setsize, &fds, 0, 0, &waitfor);
if (r < 0)
{
logAbort("I/O error; restart by quit\n");
}
if (r > 0)
{
if (fd1 >= 0 && FD_ISSET(fd1, &fds))
{
ret |= FD1_Ready;
}
if (fd2 >= 0 && FD_ISSET(fd2, &fds))
{
ret |= FD2_Ready;
}
}
if (!ret && timeout)
{
logAbort("Timeout %ld seconds; restart by quit\n", timeout);
}
return ret;
}
int64_t epoch(void)
{
struct timeval t;
if (gettimeofday(&t, 0))
{
logAbort("Error on obtaining wall clock\n");
}
return (int64_t) t.tv_sec * 1000 + t.tv_usec / 1000;
}
void die (char * t)
{
int e = errno;
char * s = 0;
if (e)
{
s = strerror(e);
}
if (s)
{
logAbort("%s: %s\n", t, s);
}
else
{
logAbort("%s\n", t);
}
}
static bool storeMessage(char * line, size_t len)
{
char *s, *e = 0, *e2;
Message * m;
int i, idx, k;
int src, dst, prn = 0;
Pgn * pgn;
time_t now;
char * key2 = 0;
int valid;
char value[16];
now = time(0);
logDebug("storeMessage(\"%s\",%u)\n", line, len);
if (!strstr(line, "\"fields\":"))
{
logDebug("Ignore: pgn %u without fields\n", prn);
return false;
}
if (memcmp(line, "{\"timestamp", 11) != 0)
{
logDebug("Ignore: no timestamp: '%s'\n", line);
return false;
}
if (memcmp(line + len - 2, "}}", 2) != 0)
{
logDebug("Ignore: no line end: '%s'\n", line);
return false;
}
if (getJSONValue(line, "src", value, sizeof(value)))
{
sscanf(value, "%d", &src);
}
if (getJSONValue(line, "dst", value, sizeof(value)))
{
sscanf(value, "%d", &dst);
}
if (getJSONValue(line, "pgn", value, sizeof(value)))
{
sscanf(value, "%d", &prn);
}
idx = PrnToIdx(prn);
logDebug("src=%d dst=%d prn=%d idx=%d\n", src, dst, prn, idx);
if (idx < 0)
{
logError("Ignore: prn %d: '%s'\n", prn, line);
return false;
}
/* Look for a secondary key */
for (k = 0; k < ARRAYSIZE(secondaryKeyList); k++)
{
s = strstr(line, secondaryKeyList[k]);
if (s)
{
logDebug("Found 2nd key %d = %s\n", k, secondaryKeyList[k]);
s += strlen(secondaryKeyList[k]);
while (strchr(SKIP_CHARACTERS, *s))
{
s++;
}
e = strchr(s, ' ');
e2 = strchr(s, '"');
if (!e || e2 < e)
{
e = e2;
}
if (!e)
{
e = s + strlen(s);
}
if (e > s && e[-1] == ',')
{
e--;
}
key2 = malloc(e - s + 1);
if (!key2)
{
logAbort("Out of memory allocating %u bytes", e - s);
}
memcpy(key2, s, e - s);
key2[e - s] = 0;
break;
}
}
pgn = pgnIdx[idx];
if (!pgn)
{
if (maxPgnList == ARRAYSIZE(pgnList))
{
logAbort("Too many PGNs\n");
}
pgn = calloc(1, sizeof(Pgn) + sizeof(Message));
if (!pgn)
{
logAbort("Out of memory allocating %u bytes", sizeof(Pgn) + sizeof(Message));
}
pgnIdx[idx] = pgn;
pgnList[maxPgnList++] = &pgnIdx[idx];
logDebug("Storing new PGN %d in index %u\n", prn, idx);
}
if (!pgn->p_description)
{
pgn->p_prn = prn;
s = strstr(line, "\"description\":");
if (s)
{
s = s + sizeof("\"description\":");
e = strchr(s, ':');
e2 = strchr(s, '"');
if (!e || e2 < e)
{
e = e2;
}
if (!e)
{
logDebug("Cannot find end of description in %s\n", s);
return false;
}
logDebug("New PGN '%.*s'\n", e - s, s);
pgn->p_description = malloc(e - s + 1);
if (!pgn->p_description)
{
logAbort("Out of memory allocating %u bytes", e - s);
}
memcpy(pgn->p_description, s, e - s);
pgn->p_description[e - s] = 0;
}
}
/* Find existing key */
for (i = 0; i < pgn->p_maxSrc; i++)
{
if (pgn->p_message[i].m_src == src)
{
if (pgn->p_message[i].m_key2)
{
if (key2 && strcmp(pgn->p_message[i].m_key2, key2) == 0)
{
break;
}
}
else
{
break;
}
}
}
/* Reuse expired key ? */
if (i == pgn->p_maxSrc)
{
for (i = 0; i < pgn->p_maxSrc; i++)
{
if (pgn->p_message[i].m_time < now)
{
pgn->p_message[i].m_src = (uint8_t) src;
if (pgn->p_message[i].m_key2)
{
free(pgn->p_message[i].m_key2);
}
pgn->p_message[i].m_key2 = key2;
key2 = 0;
break;
}
}
}
/* Create new key */
if (i == pgn->p_maxSrc)
{
size_t newSize;
pgn->p_maxSrc++;
newSize = sizeof(Pgn) + pgn->p_maxSrc * sizeof(Message);
pgn = realloc(pgnIdx[idx], newSize);
if (!pgn)
{
logAbort("Out of memory allocating %u bytes", newSize);
}
pgnIdx[idx] = pgn;
pgn->p_message[i].m_src = (uint8_t) src;
pgn->p_message[i].m_key2 = key2;
key2 = 0;
pgn->p_message[i].m_text = 0;
}
m = &pgn->p_message[i];
if (m->m_text)
{
m->m_text = realloc(m->m_text, len + 2);
}
else
{
m->m_text = malloc(len + 2);
}
if (!m->m_text)
{
logAbort("Out of memory allocating %u bytes", len + 1);
}
memcpy(m->m_text, line, len);
m->m_text[len] = '\n';
m->m_text[len + 1] = 0;
if (prn == 60928 || prn == 126996)
{
valid = CLAIM_TIMEOUT;
}
else if (prn == 130816)
{
valid = SONICHUB_TIMEOUT;
}
else
{
valid = secondaryKeyTimeout[k];
}
logDebug("stored prn %d timeout=%d 2ndKey=%d\n", prn, valid, k);
if (key2)
{
free(key2);
}
m->m_time = now + valid;
return true;
}
void writeAllClients(void)
{
fd_set ws;
struct timeval timeout = {0, 0};
int r;
int i;
SOCKET fd;
int64_t now = 0;
char * state = 0;
logDebug("writeAllClients tcp.len=%d\n", tcpMessage.len);
FD_ZERO(&ws);
if (socketIdxMax >= 0)
{
ws = writeSet;
r = select(socketFdMax + 1, 0, &ws, 0, &timeout);
logDebug("write to %d streams (%u..%u fdMax=%d)\n", r, socketIdxMin, socketIdxMax, socketFdMax);
for (i = socketIdxMin; r > 0 && i <= socketIdxMax; i++)
{
fd = stream[i].fd;
if (fd < 0)
{
continue;
}
if (fd > 8192)
{
logAbort("Stream %d contains invalid fd %d\n", i, fd);
}
if (fd > socketFdMax)
{
logAbort("Inconsistent: fd[%u]=%d, fdMax=%d\n", i, fd, socketFdMax);
}
if (FD_ISSET(fd, &ws))
{
logDebug("%s i=%u fd=%d writable=%d\n", streamTypeName[stream[i].type], i, fd, FD_ISSET(fd, &ws));
r--;
if (!now) now = epoch();
switch (stream[i].type)
{
case CLIENT_JSON:
if (stream[i].timeout && stream[i].timeout < now)
{
if (!state)
{
state = getFullStateJSON();
logDebug("json=%s", state);
}
write(fd, state, strlen(state));
logDebug("JSON: wrote %u to %d, closing\n", strlen(state), fd);
closeStream(i);
}
break;
case CLIENT_NMEA0183_STREAM:
logDebug("NMEA-> %d\n", nmeaMessage.len);
if (nmeaMessage.len)
{
write(fd, nmeaMessage.data, nmeaMessage.len);
}
break;
case CLIENT_JSON_STREAM:
if (tcpMessage.len)
{
write(fd, tcpMessage.data, tcpMessage.len);
}
break;
case DATA_OUTPUT_STREAM:
case DATA_OUTPUT_COPY:
if (outMessage.len)
{
write(fd, outMessage.data, outMessage.len);
}
break;
default:
break;
}
}
}
}
if (state)
{
free(state);
}
outMessage.len = 0;
tcpMessage.len = 0;
nmeaMessage.len = 0;
# ifdef NEVER
{
static int count = 0;
if (count++ > 100)
{
exit(1);
}
}
# endif
}
void handleClientRequest(int i)
{
ssize_t r;
char * p;
r = read(stream[i].fd, stream[i].buffer + stream[i].len, sizeof(stream[i].buffer) - 1 - stream[i].len);
logDebug("read i=%d fd=%d r=%d\n", i, stream[i].fd, r);
if (r < 0)
{
if (stream[i].fd == stdinfd)
{
logAbort("Read %d on reading stdin\n", r);
}
closeStream(i);
return;
}
if (r == 0)
{
if (stream[i].type == DATA_INPUT_STREAM)
{
logAbort("EOF on reading stdin\n", r);
}
else
{
closeStream(i);
}
return;
}
stream[i].len += r;
stream[i].buffer[stream[i].len] = 0;
while (r > 0)
{
p = strchr(stream[i].buffer, '\n');
if (p)
{
size_t len = ++p - stream[i].buffer;
/* Feed it into the NMEA2000 message handler */
char stash = *p;
logDebug("Got msg='%1.*s'\n", len, stream[i].buffer);
*p = 0;
sbAppendData(&tcpMessage, stream[i].buffer, len);
if (stream[i].type != DATA_INPUT_STREAM || stream[outputIdx].type == DATA_OUTPUT_COPY)
{
/* Send all TCP client input and the main stdin stream if the mode is -o */
/* directly to stdout */
sbAppendData(&outMessage, stream[i].buffer, len);
}
convertJSONToNMEA0183(&nmeaMessage, stream[i].buffer);
storeMessage(stream[i].buffer, len);
*p = stash;
/* Now remove [buffer..p> */
memcpy(stream[i].buffer, p, strlen(p));
stream[i].len -= len;
r -= len;
}
else
{
r = 0;
}
}
}
void storeMessage(char * line, size_t len)
{
char *s, *e = 0, *e2;
Message * m;
int i, idx, k;
int src, dst, prn = 0;
Pgn * pgn;
time_t now;
char * key2 = 0;
int valid;
now = time(0);
if (!strstr(line, "\"fields\":"))
{
#ifdef DEBUG
logDebug("Ignore pgn %u without fields\n", prn);
#endif
return;
}
if (memcmp(line, "{\"timestamp", 11) != 0)
{
logDebug("Ignore '%s'\n", line);
return;
}
if (memcmp(line + len - 3, "}}\n", 3) != 0)
{
logDebug("Ignore '%s' (end)\n", line);
return;
}
s = strstr(line, "\"src\":");
if (s)
{
if (sscanf(s + sizeof("\"src\":"), "%u\",\"dst\":\"%u\",\"pgn\":\"%u\"", &src, &dst, &prn))
{
#ifdef DEBUG
logDebug("prn=%u src=%u\n", prn, src);
#endif
}
}
if (prn == 0 || prn > MAX_PGN)
{
return;
}
/* Look for a secondary key */
for (k = 0; k < ARRAYSIZE(secondaryKeyList); k++)
{
s = strstr(line, secondaryKeyList[k]);
if (s)
{
s += strlen(secondaryKeyList[k]);
while (strchr(SKIP_CHARACTERS, *s))
{
s++;
}
e = strchr(s, ' ');
e2 = strchr(s, '"');
if (!e || e2 < e)
{
e = e2;
}
if (!e)
{
e = s + strlen(s);
}
key2 = malloc(e - s + 1);
if (!key2)
{
logAbort("Out of memory allocating %u bytes", e - s);
}
memcpy(key2, s, e - s);
key2[e - s] = 0;
}
}
idx = PrnToIdx(prn);
if (idx < 0)
{
logAbort("PRN %d is out of range\n", prn);
}
pgn = pgnIdx[idx];
if (!pgn)
{
if (maxPgnList == ARRAYSIZE(pgnList))
{
logAbort("Too many PGNs\n");
}
pgn = calloc(1, sizeof(Pgn) + sizeof(Message));
if (!pgn)
{
logAbort("Out of memory allocating %u bytes", sizeof(Pgn) + sizeof(Message));
}
pgnIdx[idx] = pgn;
pgnList[maxPgnList++] = &pgnIdx[idx];
logDebug("Storing new PGN %d in index %u\n", prn, idx);
}
if (!pgn->p_description)
{
pgn->p_prn = prn;
s = strstr(line, "\"description\":");
if (s)
{
s = s + sizeof("\"description\":");
e = strchr(s, ':');
e2 = strchr(s, '"');
if (!e || e2 < e)
{
e = e2;
}
if (!e)
{
logDebug("Cannot find end of description in %s\n", s);
return;
}
logDebug("New PGN '%.*s'\n", e - s, s);
pgn->p_description = malloc(e - s + 1);
if (!pgn->p_description)
{
logAbort("Out of memory allocating %u bytes", e - s);
}
memcpy(pgn->p_description, s, e - s);
pgn->p_description[e - s] = 0;
}
}
/* Find existing key */
for (i = 0; i < pgn->p_maxSrc; i++)
{
if (pgn->p_message[i].m_src == src)
{
if (pgn->p_message[i].m_key2)
{
if (key2 && strcmp(pgn->p_message[i].m_key2, key2) == 0)
{
break;
}
}
else
{
break;
}
}
}
/* Reuse expired key ? */
if (i == pgn->p_maxSrc)
{
for (i = 0; i < pgn->p_maxSrc; i++)
{
if (pgn->p_message[i].m_time < now)
{
pgn->p_message[i].m_src = (uint8_t) src;
if (pgn->p_message[i].m_key2)
{
free(pgn->p_message[i].m_key2);
}
pgn->p_message[i].m_key2 = key2;
key2 = 0;
break;
}
}
}
/* Create new key */
if (i == pgn->p_maxSrc)
{
size_t newSize;
pgn->p_maxSrc++;
newSize = sizeof(Pgn) + pgn->p_maxSrc * sizeof(Message);
pgn = realloc(pgnIdx[idx], newSize);
if (!pgn)
{
logAbort("Out of memory allocating %u bytes", newSize);
}
pgnIdx[idx] = pgn;
pgn->p_message[i].m_src = (uint8_t) src;
pgn->p_message[i].m_key2 = key2;
key2 = 0;
pgn->p_message[i].m_text = 0;
}
m = &pgn->p_message[i];
if (m->m_text)
{
if (strlen(m->m_text) < len)
{
m->m_text = realloc(m->m_text, len + 1);
}
}
else
{
m->m_text = malloc(len + 1);
}
if (!m->m_text)
{
logAbort("Out of memory allocating %u bytes", len + 1);
}
strcpy(m->m_text, line);
if (prn == 126996)
{
valid = AIS_TIMEOUT;
}
else if (prn == 130816)
{
valid = SONICHUB_TIMEOUT;
}
else
{
valid = secondaryKeyTimeout[k];
}
m->m_time = now + valid;
}
int main(int argc, char **argv)
{
int r;
int handle;
struct termios attr;
char * name = argv[0];
char * device = 0;
struct stat statbuf;
int pid = 0;
int speed;
setProgName(argv[0]);
while (argc > 1)
{
if (strcasecmp(argv[1], "-version") == 0)
{
printf("%s\n", VERSION);
exit(0);
}
else if (strcasecmp(argv[1], "-w") == 0)
{
writeonly = 1;
}
else if (strcasecmp(argv[1], "-p") == 0)
{
passthru = 1;
}
else if (strcasecmp(argv[1], "-r") == 0)
{
readonly = 1;
}
else if (strcasecmp(argv[1], "-v") == 0)
{
verbose = 1;
}
else if (strcasecmp(argv[1], "-t") == 0 && argc > 2)
{
argc--;
argv++;
timeout = strtol(argv[1], 0, 10);
logDebug("timeout set to %ld seconds\n", timeout);
}
else if (strcasecmp(argv[1], "-s") == 0 && argc > 2)
{
argc--;
argv++;
speed = strtol(argv[1], 0, 10);
switch (speed)
{
case 38400:
baudRate = B38400;
break;
case 57600:
baudRate = B57600;
break;
case 115200:
baudRate = B115200;
break;
case 230400:
baudRate = B230400;
break;
#ifdef B460800
case 460800:
baudRate = B460800;
break;
#endif
#ifdef B921600
case 921600:
baudRate = B921600;
break;
#endif
default:
baudRate = speed;
break;
}
logDebug("speed set to %d (%d) baud\n", speed, baudRate);
}
else if (strcasecmp(argv[1], "-d") == 0)
{
setLogLevel(LOGLEVEL_DEBUG);
}
else if (strcasecmp(argv[1], "-o") == 0)
{
outputCommands = 1;
}
else if (!device)
{
device = argv[1];
}
else
{
device = 0;
break;
}
argc--;
argv++;
}
if (!device)
{
fprintf(stderr,
"Usage: %s [-w] -[-p] [-r] [-v] [-d] [-s <n>] [-t <n>] device\n"
"\n"
"Options:\n"
" -w writeonly mode, no data is read from device\n"
" -r readonly mode, no data is sent to device\n"
" -p passthru mode, data on stdin is sent to stdout but not to device\n"
" -v verbose\n"
" -d debug\n"
" -s <n> set baudrate to 38400, 57600, 115200, 230400"
#ifdef B460800
", 460800"
#endif
#ifdef B921600
", 921600"
#endif
"\n"
" -t <n> timeout, if no message is received after <n> seconds the program quits\n"
" -o output commands sent to stdin to the stdout \n"
" <device> can be a serial device, a normal file containing a raw log,\n"
" or the address of a TCP server in the format tcp://<host>[:<port>]\n"
"\n"
" Examples: %s /dev/ttyUSB0\n"
" %s tcp://192.168.1.1:10001\n"
"\n" COPYRIGHT,
name,
name,
name);
exit(1);
}
retry:
logDebug("Opening %s\n", device);
if (strncmp(device, "tcp:", STRSIZE("tcp:")) == 0)
{
handle = open_socket_stream(device);
logDebug("socket = %d\n", handle);
isFile = true;
if (handle < 0)
{
fprintf(stderr, "Cannot open NGT-1-A TCP stream %s\n", device);
exit(1);
}
}
else
{
handle = open(device, O_RDWR | O_NOCTTY | O_NONBLOCK);
logDebug("fd = %d\n", handle);
if (handle < 0)
{
logAbort("Cannot open NGT-1-A device %s\n", device);
}
if (fstat(handle, &statbuf) < 0)
{
logAbort("Cannot determine device %s\n", device);
}
isFile = S_ISREG(statbuf.st_mode);
}
if (isFile)
{
logInfo("Device is a normal file, do not set the attributes.\n");
}
else
{
logDebug("Device is a serial port, set the attributes.\n");
memset(&attr, 0, sizeof(attr));
if (cfsetspeed(&attr, baudRate) < 0)
{
logAbort("Could not set baudrate %d\n", speed);
}
attr.c_cflag |= CS8 | CLOCAL | CREAD;
attr.c_iflag |= IGNPAR;
attr.c_cc[VMIN] = 1;
attr.c_cc[VTIME] = 0;
tcflush(handle, TCIFLUSH);
tcsetattr(handle, TCSANOW, &attr);
logDebug("Device is a serial port, send the startup sequence.\n");
writeMessage(handle, NGT_MSG_SEND, NGT_STARTUP_SEQ, sizeof(NGT_STARTUP_SEQ));
sleep(2);
}
for (;;)
{
unsigned char msg[BUFFER_SIZE];
size_t msgLen;
int r = isReady(writeonly ? INVALID_SOCKET : handle, readonly ? INVALID_SOCKET : 0, INVALID_SOCKET, timeout);
if ((r & FD1_ReadReady) > 0)
{
if (!readNGT1(handle))
{
break;
}
}
if ((r & FD2_ReadReady) > 0)
{
if (!readIn(msg, sizeof(msg)))
{
break;
}
if (!passthru)
{
parseAndWriteIn(handle, msg);
}
if (outputCommands)
{
fprintf(stdout, "%s", msg);
fflush(stdout);
}
}
else if (writeonly)
{
break;
}
}
close(handle);
return 0;
}
int main(int argc, char ** argv)
{
int r;
int handle;
struct termios attr;
char * device = 0;
struct stat statbuf;
int pid = 0;
setProgName(argv[0]);
while (argc > 1)
{
if (strcasecmp(argv[1], "-r") == 0)
{
readonly = 1;
}
else if (strcasecmp(argv[1], "-d") == 0)
{
setLogLevel(LOGLEVEL_DEBUG);
}
else if (strcasecmp(argv[1], "-?") == 0)
{
break;
}
else if (!device)
{
device = argv[1];
}
else
{
device = 0;
break;
}
argc--;
argv++;
}
if (!device)
{
fprintf(stderr, "Usage: nmea0183-serial [-r] [-d] device\n\n"
"-r : read-only, do not pass stdin to stdout\n"
"-d : debug mode\n\n"
"Example: nmea0183-serial /dev/ttyUSB0\n\n"COPYRIGHT);
exit(1);
}
retry:
logDebug("Opening %s\n", device);
handle = open(device, O_RDWR | O_NOCTTY);
logDebug("fd = %d\n", handle);
if (handle < 0)
{
logAbort("NMEA-00001: Cannot open NMEA-0183 device %s\n", device);
exit(1);
}
if (fstat(handle, &statbuf) < 0)
{
logAbort("NMEA-00002: Cannot determine device %s\n", device);
exit(1);
}
isFile = S_ISREG(statbuf.st_mode);
if (!isFile)
{
logDebug("Device is a serial port, set the attributes.\n");
memset(&attr, 0, sizeof(attr));
attr.c_cflag = B38400 | CS8 | CLOCAL | CREAD;
attr.c_iflag = IGNPAR;
attr.c_oflag = 0;
attr.c_lflag = 0;
attr.c_cc[VMIN] = 0;
attr.c_cc[VTIME] = 1;
tcflush(handle, TCIFLUSH);
tcsetattr(handle, TCSANOW, &attr);
}
for (;;)
{
char msg[BUFFER_SIZE];
size_t msgLen;
enum ReadyDescriptor r;
int b;
r = isready(handle, readonly ? -1 : 0);
if ((r & FD1_Ready) > 0)
{
b = read(handle, msg, sizeof(msg));
if (b < 0)
{
break;
}
else if (b > 0)
{
if (write(1, msg, b) < b)
{
break;
}
}
}
if ((r & FD2_Ready) > 0)
{
b = read(0, msg, sizeof(msg));
if (b < 0)
{
break;
}
else if (b > 0)
{
if (write(1, msg, b) < b)
{
break;
}
if (write(handle, msg, b) < b)
{
break;
}
}
}
}
close(handle);
return 0;
}