glib/tests: Ensure that calls to write, system, symlink and pipe are checked

Assert that calls to such system calls are returning the expected values

glib/tests/fileutils.c

@@ -1469,7 +1469,7 @@ test_file_test (void)
 
   fd = g_file_open_tmp (NULL, &name, &error);
   g_assert_no_error (error);
-  write (fd, "a", 1);
+  g_assert_cmpint (write (fd, "a", 1), ==, 1);
   g_assert_cmpint (g_fsync (fd), ==, 0);
   close (fd);
 
@@ -1477,7 +1477,7 @@ test_file_test (void)
   result = g_file_test (name, G_FILE_TEST_IS_SYMLINK);
   g_assert_false (result);
 
-  symlink (name, "symlink");
+  g_assert_no_errno (symlink (name, "symlink"));
   result = g_file_test ("symlink", G_FILE_TEST_IS_SYMLINK);
   g_assert_true (result);
   unlink ("symlink");
@@ -1500,7 +1500,7 @@ test_set_contents (void)
 
   fd = g_file_open_tmp (NULL, &name, &error);
   g_assert_no_error (error);
-  write (fd, "a", 1);
+  g_assert_cmpint (write (fd, "a", 1), ==, 1);
   g_assert_cmpint (g_fsync (fd), ==, 0);
   close (fd);
 
@@ -1593,7 +1593,7 @@ test_set_contents_full (void)
 
                 fd = g_file_open_tmp (NULL, &file_name, &error);
                 g_assert_no_error (error);
-                write (fd, "a", 1);
+                g_assert_cmpint (write (fd, "a", 1), ==, 1);
                 g_assert_no_errno (g_fsync (fd));
                 close (fd);
 
@@ -1726,7 +1726,7 @@ test_set_contents_full_read_only_file (void)
    * existing file permissions. */
   fd = g_file_open_tmp (NULL, &file_name, &error);
   g_assert_no_error (error);
-  write (fd, "a", 1);
+  g_assert_cmpint (write (fd, "a", 1), ==, 1);
   g_assert_no_errno (g_fsync (fd));
   close (fd);
   g_assert_no_errno (g_chmod (file_name, 0400)); /* S_IREAD */
@@ -1800,7 +1800,7 @@ test_set_contents_full_read_only_directory (void)
       file_name = g_build_filename (dir_name, "file", NULL);
       fd = g_open (file_name, O_CREAT | O_RDWR, 0644);
       g_assert_cmpint (fd, >=, 0);
-      write (fd, "a", 1);
+      g_assert_cmpint (write (fd, "a", 1), ==, 1);
       g_assert_no_errno (g_fsync (fd));
       close (fd);
 

glib/tests/io-channel-basic.c

@@ -320,7 +320,7 @@ spawn_process (int children_nb)
       /* Spawn new Unix process */
       cmdline = g_strdup_printf ("%s --child %d:%d &",
                                  exec_name, pipe_to_sub[0], pipe_from_sub[1]);
-      system (cmdline);
+      g_assert_no_errno (system (cmdline));
 #endif
       g_free (cmdline);
 
@@ -375,9 +375,9 @@ run_process (int argc, char *argv[])
         buf[j] = ' ' + ((buflen + j) % 95);
       g_debug ("io-channel-basic: child writing %d+%d bytes to %d",
                (int) (sizeof (i) + sizeof (buflen)), buflen, writefd);
-      write (writefd, &i, sizeof (i));
-      write (writefd, &buflen, sizeof (buflen));
-      write (writefd, buf, buflen);
+      g_assert_cmpint (write (writefd, &i, sizeof (i)), ==, sizeof (i));
+      g_assert_cmpint (write (writefd, &buflen, sizeof (buflen)), ==, sizeof (buflen));
+      g_assert_cmpint (write (writefd, buf, buflen), ==, buflen);
 
 #ifdef G_OS_WIN32
       if (i % 10 == 0)

glib/tests/mainloop.c

@@ -1467,8 +1467,8 @@ test_source_unix_fd_api (void)
   gint fds_a[2];
   gint fds_b[2];
 
-  pipe (fds_a);
-  pipe (fds_b);
+  g_assert_cmpint (pipe (fds_a), ==, 0);
+  g_assert_cmpint (pipe (fds_b), ==, 0);
 
   source_a = g_source_new (&no_funcs, sizeof (FlagSource));
   source_b = g_source_new (&no_funcs, sizeof (FlagSource));

glib/tests/spawn-multithreaded.c

@@ -157,9 +157,9 @@ test_spawn_childs (void)
   main_loop = g_main_loop_new (NULL, FALSE);
 
 #ifdef G_OS_WIN32
-  system ("cd .");
+  g_assert_no_errno (system ("cd ."));
 #else
-  system ("true");
+  g_assert_no_errno (system ("true"));
 #endif
 
   n_alive = 2;
@@ -200,9 +200,9 @@ test_spawn_childs_threads (void)
   main_loop = g_main_loop_new (NULL, FALSE);
 
 #ifdef G_OS_WIN32
-  system ("cd .");
+  g_assert_no_errno (system ("cd ."));
 #else
-  system ("true");
+  g_assert_no_errno (system ("true"));
 #endif
 
   n_alive = 2;

glib/tests/unix.c

@@ -40,7 +40,7 @@ test_pipe (void)
   g_assert (res);
   g_assert_no_error (error);
 
-  write (pipefd[1], "hello", sizeof ("hello"));
+  g_assert_cmpint (write (pipefd[1], "hello", sizeof ("hello")), ==, sizeof ("hello"));
   memset (buf, 0, sizeof (buf));
   bytes_read = read (pipefd[0], buf, sizeof(buf) - 1);
   g_assert_cmpint (bytes_read, >, 0);