Fix some regressions with execution

libc/calls/execve-sysv.c

@@ -77,7 +77,9 @@ int sys_execve(const char *prog, char *const argv[], char *const envp[]) {
       (CanExecute((ape = "/usr/bin/ape")) ||
        CanExecute((ape = Join(firstnonnull(getenv("TMPDIR"),
                                            firstnonnull(getenv("HOME"), ".")),
-                              ".ape", buf))))) {
+                              ".ape", buf))) ||
+       CanExecute(
+           (ape = Join(firstnonnull(getenv("HOME"), "."), ".ape", buf))))) {
     shargs[0] = ape;
     shargs[1] = "-";
     shargs[2] = prog;

libc/calls/g_sighandrvas.c

@@ -19,5 +19,7 @@
 #include "libc/calls/state.internal.h"
 #include "libc/intrin/pthread.h"
 
-_Thread_local unsigned __sighandrvas[NSIG];
-_Thread_local unsigned __sighandflags[NSIG];
+// TODO(jart): These should be _Thread_local but doing that currently
+//             causes a regression with runitd.com on Windows.
+unsigned __sighandrvas[NSIG];
+unsigned __sighandflags[NSIG];

libc/calls/ioctl_tcsets.c

@@ -16,6 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/bits/weaken.h"
 #include "libc/calls/internal.h"
 #include "libc/calls/ioctl.h"
 #include "libc/calls/strace.internal.h"
@@ -28,6 +29,7 @@
 #include "libc/sysv/consts/termios.h"
 #include "libc/sysv/errfuns.h"
 
+void __on_ioctl_tcsets(void);
 int ioctl_tcsets_nt(int, uint64_t, const struct termios *);
 
 static int ioctl_tcsets_metal(int fd, uint64_t request,
@@ -65,10 +67,17 @@ static int ioctl_tcsets_sysv(int fd, uint64_t request,
 int ioctl_tcsets(int fd, uint64_t request, ...) {
   int rc;
   va_list va;
+  static bool once;
   const struct termios *tio;
   va_start(va, request);
   tio = va_arg(va, const struct termios *);
   va_end(va);
+  if (weaken(__on_ioctl_tcsets)) {
+    if (!once) {
+      weaken(__on_ioctl_tcsets)();
+      once = true;
+    }
+  }
   if (!tio || (IsAsan() && !__asan_is_valid(tio, sizeof(*tio)))) {
     rc = efault();
   } else if (fd >= 0) {

libc/calls/sig2.c

@@ -99,6 +99,7 @@ static bool __sig_deliver(bool restartable, int sig, int si_code,
   STRACE("delivering %G", sig);
 
   // enter the signal
+  __sig_lock();
   rva = __sighandrvas[sig];
   flags = __sighandflags[sig];
   if ((~flags & SA_NODEFER) || (flags & SA_RESETHAND)) {
@@ -109,6 +110,7 @@ static bool __sig_deliver(bool restartable, int sig, int si_code,
     // signal handler. in that case you must use SA_NODEFER.
     __sighandrvas[sig] = (int32_t)(intptr_t)SIG_DFL;
   }
+  __sig_unlock();
 
   // setup the somewhat expensive information args
   // only if they're requested by the user in sigaction()

libc/calls/sigaction.c

@@ -452,7 +452,9 @@ int sigaction(int sig, const struct sigaction *act, struct sigaction *oldact) {
   if (sig == SIGKILL || sig == SIGSTOP) {
     rc = einval();
   } else {
+    __sig_lock();
     rc = __sigaction(sig, act, oldact);
+    __sig_unlock();
   }
   STRACE("sigaction(%G, %s, [%s]) → %d% m", sig, DescribeSigaction(0, act),
          DescribeSigaction(rc, oldact), rc);

libc/calls/state.internal.h

@@ -7,8 +7,8 @@ COSMOPOLITAN_C_START_
 
 hidden extern int __vforked;
 hidden extern bool __time_critical;
-hidden _Thread_local extern unsigned __sighandrvas[NSIG];
-hidden _Thread_local extern unsigned __sighandflags[NSIG];
+hidden extern unsigned __sighandrvas[NSIG];
+hidden extern unsigned __sighandflags[NSIG];
 hidden extern const struct NtSecurityAttributes kNtIsInheritable;
 
 void __fds_lock(void);

libc/intrin/restoretty.c

@@ -16,18 +16,12 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/calls/calls.h"
 #include "libc/calls/struct/metatermios.internal.h"
-#include "libc/calls/struct/termios.h"
 #include "libc/calls/syscall-sysv.internal.h"
-#include "libc/calls/termios.h"
-#include "libc/dce.h"
 #include "libc/errno.h"
-#include "libc/intrin/promises.internal.h"
-#include "libc/log/color.internal.h"
 #include "libc/log/internal.h"
 #include "libc/log/libfatal.internal.h"
-#include "libc/runtime/internal.h"
+#include "libc/runtime/runtime.h"
 #include "libc/sysv/consts/termios.h"
 
 /**
@@ -45,22 +39,19 @@
 static bool __isrestorable;
 static union metatermios __oldtermios;
 
-static textstartup void __oldtermios_init() {
+// called weakly by libc/calls/ioctl_tcsets.c to avoid pledge("tty")
+void __on_ioctl_tcsets(void) {
   int e;
   e = errno;
-  if (PLEDGED(TTY) && sys_ioctl(0, TCGETS, &__oldtermios) != -1) {
+  if (sys_ioctl(0, TCGETS, &__oldtermios) != -1) {
     __isrestorable = true;
   }
   errno = e;
 }
 
-const void *const __oldtermios_ctor[] initarray = {
-    __oldtermios_init,
-};
-
 void __restore_tty(void) {
   int e;
-  if (__isrestorable && PLEDGED(TTY) && !__isworker && !__nocolor) {
+  if (__isrestorable && !__isworker && !__nocolor) {
     e = errno;
     sys_write(0, ANSI_RESTORE, __strlen(ANSI_RESTORE));
     sys_ioctl(0, TCSETSF, &__oldtermios);