1 files changed, 18 insertions, 0 deletions

diff --git a/coreutils/nproc.c b/coreutils/nproc.c
index f1d11fa5a..5259921f1 100644
--- a/coreutils/nproc.c
+++ b/coreutils/nproc.c
@@ -29,7 +29,11 @@
 int nproc_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int nproc_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
 {
+#if !ENABLE_PLATFORM_MINGW32
         unsigned long mask[1024];
+#else
+        DWORD_PTR affinity, process_affinity, system_affinity;
+#endif
         int count = 0;
 #if ENABLE_LONG_OPTS
         int ignore = 0;
@@ -38,7 +42,10 @@ int nproc_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                         "all\0"    No_argument       "\xff"
                         , &ignore
         );
+#endif
 
+#if !ENABLE_PLATFORM_MINGW32
+#if ENABLE_LONG_OPTS
         if (opts & (1 << 1)) {
                 DIR *cpusd = opendir("/sys/devices/system/cpu");
                 if (cpusd) {
@@ -63,6 +70,17 @@ int nproc_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
                         }
                 }
         }
+#else /* ENABLE_PLATFORM_MINGW32 */
+        if (GetProcessAffinityMask(GetCurrentProcess(), &process_affinity,
+                                        &system_affinity)) {
+                affinity = (ENABLE_LONG_OPTS && opts & (1 << 1)) ?
+                                                system_affinity : process_affinity;
+                while (affinity) {
+                        count += affinity & 1;
+                        affinity >>= 1;
+                }
+        }
+#endif /* ENABLE_PLATFORM_MINGW32 */
 
         IF_LONG_OPTS(count -= ignore;)
         if (count <= 0)