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improve error messages when tap ioctls fail

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This commit is contained in:
Ludwig Ortmann 2014-01-23 17:14:31 +01:00
parent 7f69a6a122
commit f58b312129
1 changed files with 3 additions and 5 deletions
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8
cpu/native/net/tap.c
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@ -261,10 +261,8 @@ int tap_init(char *name)
strncpy(ifr.ifr_name, name, IFNAMSIZ);
if (ioctl(_native_tap_fd, TUNSETIFF, (void *)&ifr) == -1) {
warn("ioctl");
if (close(_native_tap_fd) == -1) {
warn("close");
}
warn("ioctl TUNSETIFF");
warnx("probably the tap interface (%s) does not exist or is already taken", name);
exit(EXIT_FAILURE);
}
@ -276,7 +274,7 @@ int tap_init(char *name)
memset (&ifr, 0, sizeof (ifr));
snprintf (ifr.ifr_name, sizeof (ifr.ifr_name), "%s", name);
if (ioctl(_native_tap_fd, SIOCGIFHWADDR, &ifr) == -1) {
warn("ioctl");
warn("ioctl SIOCGIFHWADDR");
if (close(_native_tap_fd) == -1) {
warn("close");
}