Improvement of fcntl() non blocking setting

ARMmbed · Jun 8, 2021 · 1abb2c7 · 1abb2c7
1 parent 3a05db8
commit 1abb2c7
Showing 1 changed file with 8 additions and 5 deletions.
diff --git a/platform/source/mbed_retarget.cpp b/platform/source/mbed_retarget.cpp
@@ -1181,7 +1181,7 @@ extern "C" int fcntl(int fildes, int cmd, ...)
  switch (cmd) {
  case F_GETFL: {
  int flags = 0;
- if (fhc->is_blocking()) {
+ if (!fhc->is_blocking()) {
  flags |= O_NONBLOCK;
  }
  return flags;
@@ -1191,10 +1191,13 @@ extern "C" int fcntl(int fildes, int cmd, ...)
  va_start(ap, cmd);
  int flags = va_arg(ap, int);
  va_end(ap);
- int ret = fhc->set_blocking(flags & O_NONBLOCK);
- if (ret < 0) {
- errno = -ret;
- return -1;
+ if (flags & O_NONBLOCK)
+ {
+ int ret = fhc->set_blocking(false);
+ if (ret < 0) {
+ errno = -ret;
+ return -1;
+ }
  }
  return 0;
  }