Make improvements

- Fix build flakes
- Polyfill SIGWINCH on Windows
- Fix an execve issue on Windows
- Make strerror show more information
- Improve cmd.exe setup/teardown on Windows
- Support bracketed paste mode in Blinkenlights
- Show keyboard shortcuts in Blinkenlights status bar
- Fixed copy_file_range() and copyfile() w/ zip filesystem
- Size optimize GetDosArgv() to keep life.com 12kb in size
- Improve Blinkenlights ability to load weird ELF executables
- Fix program_executable_name and add GetInterpreterExecutableName
- Make Python in tiny mode fail better if docstrings are requested
- Update Python test exclusions in tiny* modes such as tinylinux
- Add bulletproof unbreakable kprintf() troubleshooting function
- Remove "oldskool" keyword from ape.S for virus scanners
- Fix issue that caused backtraces to not print sometimes
- Improve Blinkenlights serial uart character i/o
- Make clock_gettime() not clobber errno on xnu
- Improve sha256 cpuid check for old computers
- Integrate some bestline linenoise fixes
- Show runit process names better in htop
- Remove SIGPIPE from ShowCrashReports()
- Make realpath() not clobber errno
- Avoid attaching GDB on non-Linux
- Improve img.com example

libc/calls/ioctl_tcsets.c

@@ -25,6 +25,8 @@
 #include "libc/sysv/consts/termios.h"
 #include "libc/sysv/errfuns.h"
 
+extern bool __nomultics;
+
 int ioctl_tcsets_nt(int, uint64_t, const struct termios *);
 
 static int ioctl_tcsets_metal(int fd, uint64_t request,
@@ -35,7 +37,7 @@ static int ioctl_tcsets_metal(int fd, uint64_t request,
 static inline void *__termios2host(union metatermios *mt,
                                    const struct termios *lt) {
   if (!IsXnu() && !IsFreebsd() && !IsOpenbsd() && !IsNetbsd()) {
-    return lt;
+    return (/*unconst*/ void *)lt;
   } else if (IsXnu()) {
     COPY_TERMIOS(&mt->xnu, lt);
     return &mt->xnu;
@@ -60,23 +62,29 @@ static int ioctl_tcsets_sysv(int fd, uint64_t request,
  * @see ioctl(fd, TIOCGETA{,W,F}, tio) dispatches here
  */
 int ioctl_tcsets(int fd, uint64_t request, ...) {
+  int rc;
   va_list va;
   const struct termios *tio;
   va_start(va, request);
   tio = va_arg(va, const struct termios *);
   va_end(va);
-  if (!tio) return efault();
-  if (fd >= 0) {
+  if (!tio) {
+    rc = efault();
+  } else if (fd >= 0) {
     if (fd < g_fds.n && g_fds.p[fd].kind == kFdZip) {
-      return enotty();
+      rc = enotty();
     } else if (IsMetal()) {
-      return ioctl_tcsets_metal(fd, request, tio);
+      rc = ioctl_tcsets_metal(fd, request, tio);
     } else if (!IsWindows()) {
-      return ioctl_tcsets_sysv(fd, request, tio);
+      rc = ioctl_tcsets_sysv(fd, request, tio);
     } else {
-      return ioctl_tcsets_nt(fd, request, tio);
+      rc = ioctl_tcsets_nt(fd, request, tio);
     }
   } else {
-    return einval();
+    rc = einval();
   }
+  if (rc != -1) {
+    __nomultics = !(tio->c_oflag & OPOST);
+  }
+  return rc;
 }