static int handle_netdev_show(int argc, char *argv[], int optind)
{
if (argc <= optind + 1) {
return show_any();
}
const char *devname = argv[optind + 1];
int fd = socket(PF_LAPD, SOCK_SEQPACKET, 0);
if (fd < 0) {
print_usage("Cannot create socket: %s\n",
strerror(errno));
return 1;
}
struct ifreq ifr;
strncpy(ifr.ifr_name, devname, IFNAMSIZ);
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
close(fd);
fprintf(stderr, "ioctl(SIOCGIFFLAGS): %s\n",
strerror(errno));
}
printf("%s: %s %s\n",
ifr.ifr_name,
(ifr.ifr_flags & IFF_UP) ? "UP" : "DOWN",
(ifr.ifr_flags & IFF_ALLMULTI) ? "NT" : "TE");
return 0;
}
static void
signal_handler( int num, siginfo_t *info, void *foo )
{
ucontext_t *uctx = foo;
#else
static void
signal_handler( int num )
{
#endif
DirectResult ret;
int i;
DirectLink *l, *n;
SigHandled *sig = NULL;
void *addr = NULL;
// fflush(stdout);
// fflush(stderr);
for (i=0; i<NUM_SIGS_TO_HANDLE; i++) {
if (sigs_handled[i].signum == num) {
sig = &sigs_handled[i];
/* Using SA_RESETHAND, so... */
sig->signum = -1;
break;
}
}
/* ret = direct_sigaction( num, &sig->old_action, NULL );
if (ret) {
D_DERROR( ret, "Direct/Signals: Unable to restore previous handler for signal %d!\n", num );
sig = NULL;
}
*/
#ifndef SA_SIGINFO
D_LOG( Direct_Signals, FATAL, " --> Caught signal %d <--\n", num );
#else
if (info && info > (siginfo_t*) 0x100) {
bool shown = false;
/* Kernel genrated signal? */
if (info->si_code > 0 && info->si_code < 0x80) {
addr = info->si_addr;
switch (num) {
case SIGSEGV:
shown = show_segv( info, uctx );
break;
case SIGBUS:
shown = show_bus( info, uctx );
break;
case SIGILL:
shown = show_ill( info, uctx );
break;
case SIGFPE:
shown = show_fpe( info, uctx );
break;
default:
D_LOG( Direct_Signals, FATAL, " --> Caught signal %d <--\n", info->si_signo );
addr = NULL;
shown = true;
break;
}
}
else
shown = show_any( info, uctx );
if (!shown)
D_LOG( Direct_Signals, FATAL, " --> Caught signal %d (unknown origin) <--\n", info->si_signo );
}
else
D_LOG( Direct_Signals, FATAL, " --> Caught signal %d, no siginfo available <--\n", num );
#endif
direct_log_lock( NULL );
direct_trace_print_stacks();
direct_log_unlock( NULL );
/* Loop through all handlers. */
direct_mutex_lock( &handlers_lock );
direct_list_foreach_safe (l, n, handlers) {
DirectSignalHandler *handler = (DirectSignalHandler*) l;
if (handler->num != num && handler->num != DIRECT_SIGNAL_ANY)
continue;
switch (handler->func( num, addr, handler->ctx )) {
case DSHR_OK:
break;
case DSHR_REMOVE:
direct_list_remove( &handlers, &handler->link );
D_MAGIC_CLEAR( handler );
D_FREE( handler );
break;
case DSHR_RESUME:
D_LOG( Direct_Signals, FATAL, " '-> cured!\n" );
direct_mutex_unlock( &handlers_lock );
if (sig) {
ret = direct_sigaction( num, &sig->new_action, NULL );
if (ret)
D_DERROR( ret, "Direct/Signals: Unable to reinstall handler for signal %d!\n", num );
else
sig->signum = num;
}
return;
default:
D_BUG( "unknown result" );
break;
}
}
