[Bug 1871129] Re: htop is blank when using in focal in wsl1

[Rafael David Tinoco]

Commit to blame in glibc:

commit 3537ecb49cf7177274607004c562d6f9ecc99474
Author: Adhemerval Zanella <adhemerval.zanella at linaro.org>
Date:   Tue Nov 5 21:37:44 2019 +0000

    Refactor nanosleep in terms of clock_nanosleep

    The generic version is straightforward.  For Hurd, its nanosleep
    implementation is moved to clock_nanosleep with adjustments from
    generic unix implementation.

    The generic clock_nanosleep unix version is also removed since
    it calls nanosleep.

    Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.

    Reviewed-by: Florian Weimer <fweimer at redhat.com>

diff --git a/posix/nanosleep.c b/posix/nanosleep.c
index d8564c7119..ed41c8cce7 100644
--- a/posix/nanosleep.c
+++ b/posix/nanosleep.c
@@ -24,10 +24,13 @@ int
 __nanosleep (const struct timespec *requested_time,
             struct timespec *remaining)
 {
-  __set_errno (ENOSYS);
-  return -1;
+  int ret = __clock_nanosleep (CLOCK_REALTIME, 0, requested_time, remaining);
+  if (ret != 0)
+    {
+      __set_errno (ret);
+      return -1;
+    }
+  return 0;
 }
-stub_warning (nanosleep)
-
-hidden_def (__nanosleep)
+libc_hidden_def (__nanosleep)
 weak_alias (__nanosleep, nanosleep)

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https://bugs.launchpad.net/bugs/1871129

Title:
  htop is blank when using in focal in wsl1

Status in glibc package in Ubuntu:
  Confirmed
Status in htop package in Ubuntu:
  Opinion

Bug description:
  Right now I am trying Ubuntu 20.04 on WSL and I noticed that when I
  run htop in WSL 1st generation, it is completely blank:

  https://user-images.githubusercontent.com/15316889/78563857-31697b00
  -784e-11ea-9f21-338a6cf8cb23.gif

  The previous version (htop 2.1.0) works without any issue.

  I am using htop 2.2.0-2build1 on Ubuntu 20.04 on WSL1 on Windows 10
  build 19592.1001.

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