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// RUN: %clangxx -std=c++11 -O0 -g %s -o %t && %run %t 2>&1 | FileCheck %s
#include <assert.h>
#include <climits>
#include <errno.h>
#include <stdio.h>
#include <signal.h>
#include <initializer_list>
constexpr int std_signals[] = {
SIGHUP,
SIGINT,
SIGQUIT,
SIGILL,
SIGTRAP,
SIGABRT,
SIGIOT,
SIGBUS,
SIGFPE,
SIGUSR1,
SIGSEGV,
SIGUSR2,
SIGPIPE,
SIGALRM,
SIGTERM,
SIGCHLD,
SIGCONT,
SIGTSTP,
SIGTTIN,
SIGTTOU,
SIGURG,
SIGXCPU,
SIGXFSZ,
SIGVTALRM,
SIGPROF,
SIGWINCH,
SIGIO,
SIGSYS,
};
constexpr int no_change_act_signals[] = {
SIGKILL,
SIGSTOP,
};
void signal_handler(int) {}
void signal_action_handler(int, siginfo_t*, void*) {}
void test_signal_custom() {
for (int signum : std_signals) {
auto* ret = signal(signum, &signal_handler);
assert(ret != SIG_ERR);
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
auto* ret = signal(signum, &signal_handler);
assert(ret != SIG_ERR);
}
#endif
for (int signum : no_change_act_signals) {
auto* ret = signal(signum, &signal_handler);
int err = errno;
assert(ret == SIG_ERR);
assert(err == EINVAL);
}
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
auto* ret = signal(signum, &signal_handler);
int err = errno;
assert(ret == SIG_ERR);
assert(err == EINVAL);
}
}
void test_signal_ignore() {
for (int signum : std_signals) {
auto* ret = signal(signum, SIG_IGN);
if (signum != SIGCHLD) {
// POSIX.1-1990 disallowed setting the action for SIGCHLD to SIG_IGN
// though POSIX.1-2001 and later allow this possibility.
assert(ret != SIG_ERR);
}
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
auto* ret = signal(signum, SIG_IGN);
assert(ret != SIG_ERR);
}
#endif
for (int signum : no_change_act_signals) {
auto* ret = signal(signum, SIG_IGN);
int err = errno;
assert(ret == SIG_ERR);
assert(err == EINVAL);
}
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
auto* ret = signal(signum, SIG_IGN);
int err = errno;
assert(ret == SIG_ERR);
assert(err == EINVAL);
}
}
void test_signal_default() {
for (int signum : std_signals) {
auto* ret = signal(signum, SIG_DFL);
assert(ret != SIG_ERR);
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
auto* ret = signal(signum, SIG_DFL);
assert(ret != SIG_ERR);
}
#endif
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
auto* ret = signal(signum, SIG_DFL);
int err = errno;
assert(ret == SIG_ERR);
assert(err == EINVAL);
}
}
void test_sigaction_custom() {
struct sigaction act = {}, oldact;
act.sa_handler = &signal_handler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
for (int signum : std_signals) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#endif
for (int signum : no_change_act_signals) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
act.sa_handler = nullptr;
act.sa_sigaction = &signal_action_handler;
act.sa_flags = SA_SIGINFO;
for (int signum : std_signals) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#endif
for (int signum : no_change_act_signals) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
}
void test_sigaction_ignore() {
struct sigaction act = {}, oldact;
act.sa_handler = SIG_IGN;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
for (int signum : std_signals) {
int ret = sigaction(signum, &act, &oldact);
if (signum != SIGCHLD) {
// POSIX.1-1990 disallowed setting the action for SIGCHLD to SIG_IGN
// though POSIX.1-2001 and later allow this possibility.
assert(ret == 0);
}
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#endif
for (int signum : no_change_act_signals) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
}
void test_sigaction_default() {
struct sigaction act = {}, oldact;
act.sa_handler = SIG_DFL;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
for (int signum : std_signals) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#ifdef SIGRTMIN
for (int signum = SIGRTMIN; signum <= SIGRTMAX; ++signum) {
int ret = sigaction(signum, &act, &oldact);
assert(ret == 0);
}
#endif
for (int signum : {
0,
#ifdef SIGRTMAX
SIGRTMAX + 1,
#endif
INT_MAX}) {
int ret = sigaction(signum, &act, &oldact);
int err = errno;
assert(ret == -1);
assert(err == EINVAL);
}
}
int main(void) {
printf("sigaction\n");
test_signal_custom();
test_signal_ignore();
test_signal_default();
test_sigaction_custom();
test_sigaction_ignore();
test_sigaction_default();
// CHECK: sigaction
return 0;
}
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