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fake-input-accelerometer: Expand warn_unused_result check

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With

   CPPFLAGS='-D_FORTIFY_SOURCE=2'   ./configure

we otherwise fail like

fake-input-accelerometer.c:90:8: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
   90 |  (void)write (data->uinput, &ev, sizeof(ev));
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fake-input-accelerometer.c:94:8: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
   94 |  (void)write (data->uinput, &ev, sizeof(ev));
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fake-input-accelerometer.c:98:8: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
   98 |  (void)write (data->uinput, &ev, sizeof(ev));
      |        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fake-input-accelerometer.c:104:9: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
  104 |  (void) write (data->uinput, &ev, sizeof(ev));
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

The '!' trick is from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425#c34

Closes: #248
This commit is contained in:
Guido Günther
2019-12-23 17:50:52 +01:00
committed by Bastien Nocera
parent 3694cd3101
commit 1d56dca339
1 changed files with 4 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/fake-input-accelerometer.c
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@@ -87,21 +87,21 @@ send_uinput_event (OrientationData *data)
ev.type = EV_ABS;
ev.code = ABS_X;
ev.value = data->accel_x;
(void) write (data->uinput, &ev, sizeof(ev));
(void) !write (data->uinput, &ev, sizeof(ev));
ev.code = ABS_Y;
ev.value = data->accel_y;
(void) write (data->uinput, &ev, sizeof(ev));
(void) !write (data->uinput, &ev, sizeof(ev));
ev.code = ABS_Z;
ev.value = data->accel_z;
(void) write (data->uinput, &ev, sizeof(ev));
(void) !write (data->uinput, &ev, sizeof(ev));
memset(&ev, 0, sizeof(ev));
gettimeofday(&ev.time, NULL);
ev.type = EV_SYN;
ev.code = SYN_REPORT;
(void) write (data->uinput, &ev, sizeof(ev));
(void) !write (data->uinput, &ev, sizeof(ev));
if (!data->uinput_dev)
data->uinput_dev = setup_uinput_udev (data->client);