[PULL 6/6] nbd: disable signals and forking on Windows builds

[Eric Blake]

From: Daniel P. Berrangé <berrange@redhat.com>

Disabling these parts are sufficient to get the qemu-nbd program
compiling in a Windows build.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200825103850.119911-4-berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 qemu-nbd.c  | 5 +++++
 meson.build | 7 ++-----
 2 files changed, 7 insertions(+), 5 deletions(-)

diff --git a/qemu-nbd.c b/qemu-nbd.c
index dc6ef089afd5..33476a1000c8 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -899,6 +899,7 @@ int main(int argc, char **argv)
 #endif

     if ((device && !verbose) || fork_process) {
+#ifndef WIN32
         int stderr_fd[2];
         pid_t pid;
         int ret;
@@ -962,6 +963,10 @@ int main(int argc, char **argv)
              */
             exit(errors);
         }
+#else /* WIN32 */
+        error_report("Unable to fork into background on Windows hosts");
+        exit(EXIT_FAILURE);
+#endif /* WIN32 */
     }

     if (device != NULL && sockpath == NULL) {
diff --git a/meson.build b/meson.build
index 55c7d2318cdb..5aaa3647305d 100644
--- a/meson.build
+++ b/meson.build
@@ -1095,12 +1095,9 @@ if have_tools
              dependencies: [authz, block, crypto, io, qom, qemuutil], install: 
true)
   qemu_io = executable('qemu-io', files('qemu-io.c'),
              dependencies: [block, qemuutil], install: true)
-  qemu_block_tools += [qemu_img, qemu_io]
-  if targetos != 'windows'
-    qemu_nbd = executable('qemu-nbd', files('qemu-nbd.c'),
+  qemu_nbd = executable('qemu-nbd', files('qemu-nbd.c'),
                dependencies: [block, qemuutil], install: true)
-    qemu_block_tools += [qemu_nbd]
-  endif
+  qemu_block_tools += [qemu_img, qemu_io, qemu_nbd]

   subdir('storage-daemon')
   subdir('contrib/rdmacm-mux')
-- 
2.28.0