#define DEFAULT_LOOPS 1 /* only one replay */
#define CHANNELS 20 /* anyone using more than 20 CAN interfaces at a time? */
#define BUFSZ 400 /* for one line in the logfile */
+#define STDOUTIDX 65536 /* interface index for printing on stdout - bigger than max uint16 */
struct assignment {
char txif[IFNAMSIZ];
"<write-if>=<log-if>\n");
fprintf(stderr, "e.g. vcan2=can0 ( send frames received from can0 on "
"vcan2 )\n");
+ fprintf(stderr, "extra hook: stdout=can0 ( print logfile line marked with can0 on "
+ "stdout )\n");
fprintf(stderr, "No assignments => send frames to the interface(s) they "
"had been received from.\n\n");
fprintf(stderr, "Lines in the logfile not beginning with '(' (start of "
}
strcpy(asgn[i].rxif, rxname);
- strcpy(ifr.ifr_name, txname);
- if (ioctl(socket, SIOCGIFINDEX, &ifr) < 0) {
- perror("SIOCGIFINDEX");
- fprintf(stderr, "write-if interface name '%s' is wrong!\n", txname);
- return 1;
- }
- asgn[i].txifidx = ifr.ifr_ifindex;
+ if (strcmp(txname, "stdout")) {
+ strcpy(ifr.ifr_name, txname);
+ if (ioctl(socket, SIOCGIFINDEX, &ifr) < 0) {
+ perror("SIOCGIFINDEX");
+ fprintf(stderr, "write-if interface name '%s' is wrong!\n", txname);
+ return 1;
+ }
+ asgn[i].txifidx = ifr.ifr_ifindex;
+ } else
+ asgn[i].txifidx = STDOUTIDX;
if (verbose > 1) /* use -v -v to see this */
printf("added %s assignment: log-if=%s write-if=%s write-if-idx=%d\n",
txidx = get_txidx(device);
}
- if (txidx) { /* only send to valid CAN devices */
+ if (txidx == STDOUTIDX) /* hook to print logfile lines on stdout */
+
+ printf("%s", buf); /* print the line AS-IS without extra \n */
+
+ else if (txidx > 0) { /* only send to valid CAN devices */
if (parse_canframe(ascframe, &frame)) {
fprintf(stderr, "wrong CAN frame format: '%s'!", ascframe);