Fix process execution on Windows 7

According to this bug report on Firefox:
<https://bugzilla.mozilla.org/show_bug.cgi?id=1460995>

> CreateProcess fails with ERROR_NO_SYSTEM_RESOURCES on Windows 7. It
> looks like the reason why is because PROC_THREAD_ATTRIBUTE_HANDLE_LIST
> doesn't like console handles.

To avoid the problem, do not pass console handles to
PROC_THREAD_ATTRIBUTE_HANDLE_LIST.

Refs #2783 <https://github.com/Genymobile/scrcpy/pull/2783>
Refs f801d8b312
Fixes #2838 <https://github.com/Genymobile/scrcpy/issues/2838>

README.md

@@ -71,12 +71,6 @@ On Debian and Ubuntu:
 apt install scrcpy
 ```
 
-On Arch Linux:
-
-```
-pacman -S scrcpy
-```
-
 A [Snap] package is available: [`scrcpy`][snap-link].
 
 [snap-link]: https://snapstats.org/snaps/scrcpy
@@ -88,6 +82,10 @@ For Fedora, a [COPR] package is available: [`scrcpy`][copr-link].
 [COPR]: https://fedoraproject.org/wiki/Category:Copr
 [copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
 
+For Arch Linux, an [AUR] package is available: [`scrcpy`][aur-link].
+
+[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
+[aur-link]: https://aur.archlinux.org/packages/scrcpy/
 
 For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
 
@@ -938,7 +936,7 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Click on `HOME`                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Middle-click_
  | Click on `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Right-click²_
  | Click on `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd> \| _4th-click³_
- | Click on `MENU` (unlock screen)⁴            | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | Click on `MENU` (unlock screen)             | <kbd>MOD</kbd>+<kbd>m</kbd>
  | Click on `VOLUME_UP`                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(up)_
  | Click on `VOLUME_DOWN`                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(down)_
  | Click on `POWER`                            | <kbd>MOD</kbd>+<kbd>p</kbd>
@@ -949,9 +947,9 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Expand notification panel                   | <kbd>MOD</kbd>+<kbd>n</kbd> \| _5th-click³_
  | Expand settings panel                       | <kbd>MOD</kbd>+<kbd>n</kbd>+<kbd>n</kbd> \| _Double-5th-click³_
  | Collapse panels                             | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
- | Copy to clipboard⁵                          | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Copy to clipboard⁴                          | <kbd>MOD</kbd>+<kbd>c</kbd>
- | Cut to clipboard⁵                           | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Cut to clipboard⁴                           | <kbd>MOD</kbd>+<kbd>x</kbd>
- | Synchronize clipboards and paste⁵           | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | Synchronize clipboards and paste⁴           | <kbd>MOD</kbd>+<kbd>v</kbd>
  | Inject computer clipboard text              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
  | Enable/disable FPS counter (on stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>
  | Pinch-to-zoom                               | <kbd>Ctrl</kbd>+_click-and-move_
@@ -961,8 +959,7 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
 _¹Double-click on black borders to remove them._  
 _²Right-click turns the screen on if it was off, presses BACK otherwise._  
 _³4th and 5th mouse buttons, if your mouse has them._  
-_⁴For react-native apps in development, `MENU` triggers development menu._  
+_⁴Only on Android >= 7._
-_⁵Only on Android >= 7._
 
 Shortcuts with repeated keys are executted by releasing and pressing the key a
 second time. For example, to execute "Expand settings panel":

app/src/sys/win/process.c

@@ -30,9 +30,7 @@ sc_process_execute_p(const char *const argv[], HANDLE *handle, unsigned flags,
     bool inherit_stderr = !perr && !(flags & SC_PROCESS_NO_STDERR);
 
     // Add 1 per non-NULL pointer
-    unsigned handle_count = !!pin
+    unsigned handle_count = !!pin || !!pout || !!perr;
-                          + (pout || inherit_stdout)
-                          + (perr || inherit_stderr);
 
     enum sc_process_result ret = SC_PROCESS_ERROR_GENERIC;
 
@@ -81,23 +79,29 @@ sc_process_execute_p(const char *const argv[], HANDLE *handle, unsigned flags,
     si.StartupInfo.cb = sizeof(si);
     HANDLE handles[3];
 
+    si.StartupInfo.dwFlags = STARTF_USESTDHANDLES;
+    if (inherit_stdout) {
+        si.StartupInfo.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+    }
+    if (inherit_stderr) {
+        si.StartupInfo.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+    }
+
     LPPROC_THREAD_ATTRIBUTE_LIST lpAttributeList = NULL;
     if (handle_count) {
-        si.StartupInfo.dwFlags = STARTF_USESTDHANDLES;
-
         unsigned i = 0;
         if (pin) {
             si.StartupInfo.hStdInput = stdin_read_handle;
             handles[i++] = si.StartupInfo.hStdInput;
         }
-        if (pout || inherit_stdout) {
+        if (pout) {
-            si.StartupInfo.hStdOutput = pout ? stdout_write_handle
+            assert(!inherit_stdout);
-                                             : GetStdHandle(STD_OUTPUT_HANDLE);
+            si.StartupInfo.hStdOutput = stdout_write_handle;
             handles[i++] = si.StartupInfo.hStdOutput;
         }
-        if (perr || inherit_stderr) {
+        if (perr) {
-            si.StartupInfo.hStdError = perr ? stderr_write_handle
+            assert(!inherit_stderr);
-                                            : GetStdHandle(STD_ERROR_HANDLE);
+            si.StartupInfo.hStdError = stderr_write_handle;
             handles[i++] = si.StartupInfo.hStdError;
         }
 
@@ -146,15 +150,22 @@ sc_process_execute_p(const char *const argv[], HANDLE *handle, unsigned flags,
         goto error_free_attribute_list;
     }
 
-    BOOL bInheritHandles = handle_count > 0;
+    BOOL bInheritHandles = handle_count > 0 || inherit_stdout || inherit_stderr;
-    // DETACHED_PROCESS to disable stdin, stdout and stderr
+    DWORD dwCreationFlags = 0;
-    DWORD dwCreationFlags = handle_count > 0 ? EXTENDED_STARTUPINFO_PRESENT
+    if (handle_count > 0) {
-                                             : DETACHED_PROCESS;
+        dwCreationFlags |= EXTENDED_STARTUPINFO_PRESENT;
+    }
+    if (!inherit_stdout && !inherit_stderr) {
+        // DETACHED_PROCESS to disable stdin, stdout and stderr
+        dwCreationFlags |= DETACHED_PROCESS;
+    }
     BOOL ok = CreateProcessW(NULL, wide, NULL, NULL, bInheritHandles,
                              dwCreationFlags, NULL, NULL, &si.StartupInfo, &pi);
     free(wide);
     if (!ok) {
-        if (GetLastError() == ERROR_FILE_NOT_FOUND) {
+        int err = GetLastError();
+        LOGE("CreateProcessW() error %d", err);
+        if (err == ERROR_FILE_NOT_FOUND) {
             ret = SC_PROCESS_ERROR_MISSING_BINARY;
         }
         goto error_free_attribute_list;