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can-utils
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Add functionality to 

terminate after receiption of <count> CAN frames.
pull/7/head
Oliver Hartkopp 2009-04-06 08:41:17 +00:00
parent 8975dcb574
commit 3e65a4e564
1 changed files with 14 additions and 1 deletions
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15
candump.c
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@ -115,6 +115,7 @@ void print_usage(char *prg)
fprintf(stderr, " -B <can> (bridge mode - like '-b' with disabled loopback)\n"); fprintf(stderr, " -B <can> (bridge mode - like '-b' with disabled loopback)\n");
fprintf(stderr, " -l (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON); fprintf(stderr, " -l (log CAN-frames into file. Sets '-s %d' by default)\n", SILENT_ON);
fprintf(stderr, " -L (use log file format on stdout)\n"); fprintf(stderr, " -L (use log file format on stdout)\n");
fprintf(stderr, " -n <count> (terminate after receiption of <count> CAN frames)\n");
fprintf(stderr, "\n"); fprintf(stderr, "\n");
fprintf(stderr, "Up to %d CAN interfaces with optional filter sets can be specified\n", MAXSOCK); 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"); fprintf(stderr, "on the commandline in the form: <ifname>[,filter]*\n");
@ -202,6 +203,7 @@ int main(int argc, char **argv)
unsigned char view = 0; unsigned char view = 0;
unsigned char log = 0; unsigned char log = 0;
unsigned char logfrmt = 0; unsigned char logfrmt = 0;
int count = 0;
int opt, ret; int opt, ret;
int currmax, numfilter; int currmax, numfilter;
char *ptr, *nptr; char *ptr, *nptr;
@ -221,7 +223,7 @@ int main(int argc, char **argv)
last_tv.tv_sec = 0; last_tv.tv_sec = 0;
last_tv.tv_usec = 0; last_tv.tv_usec = 0;
while ((opt = getopt(argc, argv, "t:ciaSs:b:B:lLh?")) != -1) { while ((opt = getopt(argc, argv, "t:ciaSs:b:B:lLn:h?")) != -1) {
switch (opt) { switch (opt) {
case 't': case 't':
timestamp = optarg[0]; timestamp = optarg[0];
@ -304,6 +306,14 @@ int main(int argc, char **argv)
logfrmt = 1; logfrmt = 1;
break; break;
case 'n':
count = atoi(optarg);
if (count < 1) {
print_usage(basename(argv[0]));
exit(1);
}
break;
default: default:
print_usage(basename(argv[0])); print_usage(basename(argv[0]));
exit(1); exit(1);
@ -500,6 +510,9 @@ int main(int argc, char **argv)
return 1; return 1;
} }
if (count && (--count == 0))
running = 0;
if (bridge) { if (bridge) {
nbytes = write(bridge, &frame, sizeof(struct can_frame)); nbytes = write(bridge, &frame, sizeof(struct can_frame));
if (nbytes < 0) { if (nbytes < 0) {