[PATCH v3 2/2] wineserver: Request RLIMIT_NOFILE maximum allowed value.

[Rémi Bernon]

From: Rémi Bernon

---
 server/main.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/server/main.c b/server/main.c
index 01bec224c70..a7700129cdc 100644
--- a/server/main.c
+++ b/server/main.c
@@ -226,6 +226,29 @@ static void set_max_limit( int limit )
     {
         rlimit.rlim_cur = rlimit.rlim_max;
         if (!setrlimit( limit, &rlimit )) return;
+
+#if defined(__APPLE__) && defined(RLIMIT_NOFILE) && defined(OPEN_MAX)
+        if (limit == RLIMIT_NOFILE)
+        {
+            unsigned int nlimit = 0;
+            size_t size;
+
+            /* On Leopard, setrlimit(RLIMIT_NOFILE, ...) fails on attempts to set
+             * rlim_cur above OPEN_MAX (even if rlim_max > OPEN_MAX).
+             *
+             * In later versions it can be set to kern.maxfilesperproc (from
+             * sysctl). In Big Sur and later it can be set to rlim_max. */
+            size = sizeof(nlimit);
+            if (sysctlbyname("kern.maxfilesperproc", &nlimit, &size, NULL, 0) != 0 || nlimit < OPEN_MAX)
+                rlimit.rlim_cur = OPEN_MAX;
+            else
+                rlimit.rlim_cur = nlimit;
+
+            if (!setrlimit( limit, &rlimit )) return;
+            rlimit.rlim_cur = OPEN_MAX;
+            if (!setrlimit( limit, &rlimit )) return;
+        }
+#endif
     }
 }

@@ -242,6 +265,9 @@ int main( int argc, char *argv[] )
     signal( SIGQUIT, sigterm_handler );
     signal( SIGTERM, sigterm_handler );
     signal( SIGABRT, sigterm_handler );
+#ifdef RLIMIT_NOFILE
+    set_max_limit( RLIMIT_NOFILE );
+#endif
 #ifdef RLIMIT_NICE
     set_max_limit( RLIMIT_NICE );
 #endif