test: fix -Wunused-result warnings

test/run-tests.c

@@ -19,6 +19,7 @@
  * IN THE SOFTWARE.
  */
 
+#include <errno.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -99,7 +100,7 @@ static int maybe_run_test(int argc, char **argv) {
 
   if (strcmp(argv[1], "spawn_helper3") == 0) {
     char buffer[256];
-    fgets(buffer, sizeof(buffer) - 1, stdin);
+    ASSERT(buffer == fgets(buffer, sizeof(buffer) - 1, stdin));
     buffer[sizeof(buffer) - 1] = '\0';
     fputs(buffer, stdout);
     return 1;
@@ -116,8 +117,15 @@ static int maybe_run_test(int argc, char **argv) {
     DWORD bytes;
     WriteFile((HANDLE) _get_osfhandle(3), out, strlen(out), &bytes, NULL);
 #else
-    write(3, out, strlen(out));
-    fsync(3);
+    {
+      ssize_t r;
+
+      do
+        r = write(3, out, strlen(out));
+      while (r == -1 && errno == EINTR);
+
+      fsync(3);
+    }
 #endif
     return 1;
   }

test/runner-unix.c

@@ -24,6 +24,7 @@
 
 #include <stdint.h> /* uintptr_t */
 
+#include <errno.h>
 #include <unistd.h> /* usleep */
 #include <string.h> /* strdup */
 #include <stdio.h>
@@ -146,8 +147,11 @@ static void* dowait(void* data) {
 
   if (args->pipe[1] >= 0) {
     /* Write a character to the main thread to notify it about this. */
-    char c = 0;
-    write(args->pipe[1], &c, 1);
+    ssize_t r;
+
+    do
+      r = write(args->pipe[1], "", 1);
+    while (r == -1 && errno == EINTR);
   }
 
   return NULL;