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can-utils
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candump: Add timeout option if no message has been received 

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
pull/7/head
Alexander Stein 2013-02-12 17:50:51 +01:00 committed by Marc Kleine-Budde
parent 667356cc36
commit e5c81aa221
1 changed files with 19 additions and 2 deletions
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21
candump.c
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@ -49,6 +49,7 @@
#include <ctype.h>
#include <libgen.h>
#include <time.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
@ -121,6 +122,7 @@ void print_usage(char *prg)
fprintf(stderr, " -d (monitor dropped CAN frames)\n");
fprintf(stderr, " -e (dump CAN error frames in human-readable format)\n");
fprintf(stderr, " -x (print extra message infos, rx/tx brs esi)\n");
fprintf(stderr, " -T <msecs> (terminate after <msecs> without any reception)\n");
fprintf(stderr, "\n");
fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK);
fprintf(stderr, "on the commandline in the form: <ifname>[,filter]*\n");
@ -227,6 +229,7 @@ int main(int argc, char **argv)
int nbytes, i, maxdlen;
struct ifreq ifr;
struct timeval tv, last_tv;
struct timeval timeout, timeout_config = { 0, 0 }, *timeout_current = NULL;
FILE *logfile = NULL;
signal(SIGTERM, sigterm);
@ -236,7 +239,7 @@ int main(int argc, char **argv)
last_tv.tv_sec = 0;
last_tv.tv_usec = 0;
while ((opt = getopt(argc, argv, "t:ciaSs:b:B:u:ldxLn:r:he?")) != -1) {
while ((opt = getopt(argc, argv, "t:ciaSs:b:B:u:ldxLn:r:heT:?")) != -1) {
switch (opt) {
case 't':
timestamp = optarg[0];
@ -351,6 +354,17 @@ int main(int argc, char **argv)
}
break;
case 'T':
errno = 0;
timeout_config.tv_usec = strtol(optarg, NULL, 0);
if (errno != 0) {
print_usage(basename(argv[0]));
exit(1);
}
timeout_config.tv_sec = timeout_config.tv_usec / 1000;
timeout_config.tv_usec = (timeout_config.tv_usec % 1000) * 1000;
timeout_current = &timeout;
break;
default:
print_usage(basename(argv[0]));
exit(1);
@ -594,7 +608,10 @@ int main(int argc, char **argv)
for (i=0; i<currmax; i++)
FD_SET(s[i], &rdfs);
if ((ret = select(s[currmax-1]+1, &rdfs, NULL, NULL, NULL)) < 0) {
if (timeout_current)
*timeout_current = timeout_config;
if ((ret = select(s[currmax-1]+1, &rdfs, NULL, NULL, timeout_current)) <= 0) {
//perror("select");
running = 0;
continue;