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lib: print the signal name to stderr when handling a signal

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Print the received signal name to stderr when handling a signal. This
uses an array of handled signal names since strsignal() only provides
descriptions.

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
This commit is contained in:
Thomas Wood 2015-02-19 13:58:06 +00:00
parent aecad4fc2e
commit 4ff4ea601a
1 changed files with 18 additions and 4 deletions
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22
lib/igt_core.c
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@ -1303,8 +1303,10 @@ static struct {
static igt_exit_handler_t exit_handler_fn[MAX_EXIT_HANDLERS];
static bool exit_handler_disabled;
static sigset_t saved_sig_mask;
static const int handled_signals[] =
{ SIGINT, SIGHUP, SIGTERM, SIGQUIT, SIGPIPE, SIGABRT, SIGSEGV, SIGBUS };
#define SIGDEF(x) { x, #x, sizeof(#x) - 1 }
static const struct { int number; const char *name; size_t name_len; } handled_signals[] =
{ SIGDEF(SIGINT), SIGDEF(SIGHUP), SIGDEF(SIGTERM), SIGDEF(SIGQUIT),
SIGDEF(SIGPIPE), SIGDEF(SIGABRT), SIGDEF(SIGSEGV), SIGDEF(SIGBUS) };
static int install_sig_handler(int sig_num, sighandler_t handler)
{
@ -1357,8 +1359,20 @@ static void igt_atexit_handler(void)
static void fatal_sig_handler(int sig)
{
int i;
restore_all_sig_handler();
for (i = 0; i < ARRAY_SIZE(handled_signals); i++) {
if (handled_signals[i].number == sig) {
write(STDERR_FILENO, "Received signal ", 16);
write(STDERR_FILENO, handled_signals[i].name,
handled_signals[i].name_len);
write(STDERR_FILENO, ".\n", 2);
break;
}
}
/*
* exit_handler_disabled is always false here, since when we set it
* we also block signals.
@ -1415,7 +1429,7 @@ void igt_install_exit_handler(igt_exit_handler_t fn)
return;
for (i = 0; i < ARRAY_SIZE(handled_signals); i++) {
if (install_sig_handler(handled_signals[i],
if (install_sig_handler(handled_signals[i].number,
fatal_sig_handler))
goto err;
}
@ -1447,7 +1461,7 @@ void igt_disable_exit_handler(void)
sigemptyset(&set);
for (i = 0; i < ARRAY_SIZE(handled_signals); i++)
sigaddset(&set, handled_signals[i]);
sigaddset(&set, handled_signals[i].number);
if (sigprocmask(SIG_BLOCK, &set, &saved_sig_mask)) {
perror("sigprocmask");