[posix] fix typo in error handling on macOS (#5394)

script/check-posix-build

@@ -33,6 +33,7 @@ main()
 {
     "$(dirname "$0")"/check-posix-build-autotools
     "$(dirname "$0")"/check-posix-build-cmake
+    "$(dirname "$0")"/check-posix-build-cmake -DOT_DAEMON=ON
 }
 
 main "$@"

script/check-posix-build-cmake

@@ -50,11 +50,11 @@ build()
 main()
 {
     reset_source
-    build
+    build "$@"
 
     if [[ $OSTYPE != "darwin"* ]]; then
         reset_source
-        build -DOT_POSIX_CONFIG_RCP_BUS=SPI
+        build -DOT_POSIX_CONFIG_RCP_BUS=SPI "$@"
     fi
 }
 

src/posix/platform/uart.cpp

@@ -237,8 +237,8 @@ static void InitializeSessionSocket(void)
     // if we have SO_NOSIGPIPE, then set it. Otherwise, we're going
     // to simply ignore it.
 #if defined(SO_NOSIGPIPE)
-    rval = 1;
-    VerifyOrExit((rval = setsockopt(sSessionSocket, SOL_SOCKET, SO_NOSIGPIPE, &rval, sizeof(rval)) != -1, OT_NOOP));
+    rval = setsockopt(sSessionSocket, SOL_SOCKET, SO_NOSIGPIPE, &rval, sizeof(rval));
+    VerifyOrExit(rval != -1, OT_NOOP);
 #else
 #warning "no support for MSG_NOSIGNAL or SO_NOSIGPIPE"
 #endif