From 7dad14fa4eeffdd758ab81e976e9ca498df82656 Mon Sep 17 00:00:00 2001 From: smayzy Date: Sat, 11 Apr 2026 15:31:15 +0200 Subject: [PATCH] add ioctl checks --- src/main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/src/main.c b/src/main.c index 5cc4dd6..a36847f 100644 --- a/src/main.c +++ b/src/main.c @@ -397,7 +397,10 @@ int main(int argc, char **argv) { } fcntl(soc, F_SETFL, O_NONBLOCK); strcpy(ifr.ifr_name, "can0"); - ioctl(soc, SIOCGIFINDEX, &ifr); + if (ioctl(soc, SIOCGIFINDEX, &ifr) < 0) { + perror("ioctl error"); + return 1; + } addr.can_family = AF_CAN; addr.can_ifindex = ifr.ifr_ifindex; if (bind(soc, (struct sockaddr *)&addr, sizeof(addr)) < 0) {