Remove testing data

1 files changed, 0 insertions, 169 deletions

diff --git a/examples/dte/signals.c b/examples/dte/signals.c
deleted file mode 100644
index e1a7155..0000000
--- a/examples/dte/signals.c
+++ /dev/null
@@ -1,169 +0,0 @@
-#include "compat.h"
-#include <errno.h>
-#include <string.h>
-#include <unistd.h>
-#include "signals.h"
-#include "util/debug.h"
-#include "util/exitcode.h"
-#include "util/log.h"
-#include "util/macros.h"
-
-volatile sig_atomic_t resized = 0;
-
-static const int ignored_signals[] = {
-    SIGINT,  // Terminal interrupt (see: VINTR in termios(3))
-    SIGQUIT, // Terminal quit (see: VQUIT in termios(3))
-    SIGTSTP, // Terminal stop (see: VSUSP in termios(3))
-    SIGXFSZ, // File size limit exceeded (see: RLIMIT_FSIZE in getrlimit(3))
-    SIGPIPE, // Broken pipe (see: EPIPE error in write(3))
-    SIGUSR1, // User signal 1 (terminates by default, for no good reason)
-    SIGUSR2, // User signal 2 (as above)
-};
-
-static const int default_signals[] = {
-    SIGABRT, // Terminate (cleanup already done)
-    SIGCHLD, // Ignore (see: wait(3))
-    SIGURG,  // Ignore
-    SIGTTIN, // Stop
-    SIGTTOU, // Stop
-    SIGCONT, // Continue
-};
-
-static const int fatal_signals[] = {
-    SIGBUS,
-    SIGFPE,
-    SIGILL,
-    SIGSEGV,
-    SIGSYS,
-    SIGTRAP,
-    SIGXCPU,
-    SIGALRM,
-    SIGVTALRM,
-    SIGHUP,
-    SIGTERM,
-#ifdef SIGPROF
-    SIGPROF,
-#endif
-#ifdef SIGEMT
-    SIGEMT,
-#endif
-};
-
-void handle_sigwinch(int UNUSED_ARG(signum))
-{
-    resized = 1;
-}
-
-static noreturn COLD void handle_fatal_signal(int signum)
-{
-    LOG_CRITICAL("received signal %d (%s)", signum, strsignal(signum));
-
-    // If `signum` is SIGHUP, there's no point in trying to clean up the
-    // state of the (disconnected) terminal
-    if (signum != SIGHUP) {
-        fatal_error_cleanup();
-    }
-
-    // Restore and unblock `signum` and then re-raise it, to ensure the
-    // termination status (as seen by e.g. waitpid(3) in the parent) is
-    // set appropriately
-    struct sigaction sa = {.sa_handler = SIG_DFL};
-    if (
-        sigemptyset(&sa.sa_mask) == 0
-        && sigaction(signum, &sa, NULL) == 0
-        && sigaddset(&sa.sa_mask, signum) == 0
-        && sigprocmask(SIG_UNBLOCK, &sa.sa_mask, NULL) == 0
-    ) {
-        raise(signum);
-    }
-
-    // This is here just to make extra certain the handler never returns.
-    // If everything is working correctly, this code should be unreachable.
-    raise(SIGKILL);
-    _exit(EX_OSERR);
-}
-
-// strsignal(3) is fine in situations where a signal is being reported
-// as terminating a process, but it tends to be confusing in most other
-// circumstances, where the signal name (not description) is usually
-// clearer
-static const char *signum_to_str(int signum)
-{
-#if HAVE_SIG2STR
-    static char buf[SIG2STR_MAX + 3];
-    if (sig2str(signum, buf + 3) == 0) {
-        return memcpy(buf, "SIG", 3);
-    }
-#elif HAVE_SIGABBREV_NP
-    static char buf[16];
-    const char *abbr = sigabbrev_np(signum);
-    if (abbr && memccpy(buf + 3, abbr, '\0', sizeof(buf) - 3)) {
-        return memcpy(buf, "SIG", 3);
-    }
-#endif
-
-    const char *str = strsignal(signum);
-    return likely(str) ? str : "??";
-}
-
-static void do_sigaction(int sig, const struct sigaction *action)
-{
-    struct sigaction old_action;
-    if (unlikely(sigaction(sig, action, &old_action) != 0)) {
-        const char *err = strerror(errno);
-        LOG_ERROR("failed to set disposition for signal %d: %s", sig, err);
-        return;
-    }
-    if (unlikely(old_action.sa_handler == SIG_IGN)) {
-        const char *str = signum_to_str(sig);
-        LOG_WARNING("ignored signal was inherited: %d (%s)", sig, str);
-    }
-}
-
-/*
- * "A program that uses these functions should be written to catch all
- * signals and take other appropriate actions to ensure that when the
- * program terminates, whether planned or not, the terminal device's
- * state is restored to its original state."
- *
- * (https://pubs.opengroup.org/onlinepubs/9699919799/functions/tcgetattr.html)
- */
-void set_signal_handlers(void)
-{
-    struct sigaction action = {.sa_handler = handle_fatal_signal};
-    sigfillset(&action.sa_mask);
-    for (size_t i = 0; i < ARRAYLEN(fatal_signals); i++) {
-        do_sigaction(fatal_signals[i], &action);
-    }
-
-    // "The default actions for the realtime signals in the range SIGRTMIN
-    // to SIGRTMAX shall be to terminate the process abnormally."
-    // (POSIX.1-2017 §2.4.3)
-#if defined(SIGRTMIN) && defined(SIGRTMAX)
-    for (int s = SIGRTMIN, max = SIGRTMAX; s <= max; s++) {
-        do_sigaction(s, &action);
-    }
-#endif
-
-    action.sa_handler = SIG_IGN;
-    for (size_t i = 0; i < ARRAYLEN(ignored_signals); i++) {
-        do_sigaction(ignored_signals[i], &action);
-    }
-
-    action.sa_handler = SIG_DFL;
-    for (size_t i = 0; i < ARRAYLEN(default_signals); i++) {
-        do_sigaction(default_signals[i], &action);
-    }
-
-#if defined(SIGWINCH)
-    LOG_INFO("setting SIGWINCH handler");
-    action.sa_handler = handle_sigwinch;
-    do_sigaction(SIGWINCH, &action);
-#endif
-
-    // Set signal mask explicitly, to avoid any possibility of
-    // inheriting blocked signals
-    sigset_t mask;
-    sigemptyset(&mask);
-    sigprocmask(SIG_SETMASK, &mask, NULL);
-}