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Make sure we ignore SIGPIPE so we don't crash if we write when the pipe is closed

This commit is contained in:
Sam Lantinga 2024-09-14 22:08:46 -07:00
parent 34b2f4ffca
commit ec5d280c90
1 changed files with 25 additions and 0 deletions
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25
src/process/posix/SDL_posixprocess.c
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@ -72,6 +72,28 @@ static bool SetupStream(SDL_Process *process, int fd, const char *mode, const ch
return true;
}
static void IgnoreSignal(int sig)
{
#ifdef HAVE_SIGACTION
struct sigaction action;
sigaction(SIGPIPE, NULL, &action);
#ifdef HAVE_SA_SIGACTION
if (action.sa_handler == SIG_DFL && (void (*)(int))action.sa_sigaction == SIG_DFL) {
#else
if (action.sa_handler == SIG_DFL) {
#endif
action.sa_handler = SIG_IGN;
sigaction(sig, &action, NULL);
}
#elif defined(HAVE_SIGNAL_H)
void (*ohandler)(int) = signal(sig, SIG_IGN);
if (ohandler != SIG_DFL && ohandler != SIG_IGN) {
signal(sig, ohandler);
}
#endif
}
static bool CreatePipe(int fds[2])
{
if (pipe(fds) < 0) {
@ -82,6 +104,9 @@ static bool CreatePipe(int fds[2])
fcntl(fds[READ_END], F_SETFD, fcntl(fds[READ_END], F_GETFD) | FD_CLOEXEC);
fcntl(fds[WRITE_END], F_SETFD, fcntl(fds[WRITE_END], F_GETFD) | FD_CLOEXEC);
// Make sure we don't crash if we write when the pipe is closed
IgnoreSignal(SIGPIPE);
return true;
}