[Bug libc/29271] New: clock_nanosleep(2) fails to report EINTR

[Bug libc/29271] New: clock_nanosleep(2) fails to report EINTR

[steffen at sdaoden dot eu]

https://sourceware.org/bugzilla/show_bug.cgi?id=29271

            Bug ID: 29271
           Summary: clock_nanosleep(2) fails to report EINTR
           Product: glibc
           Version: 2.35
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: libc
          Assignee: unassigned at sourceware dot org
          Reporter: steffen at sdaoden dot eu
                CC: drepper.fsp at gmail dot com
  Target Milestone: ---

Created attachment 14156
  --> https://sourceware.org/bugzilla/attachment.cgi?id=14156&action=edit
T

This is kernel 5.15.48, and it is glibc 2.35 patch 1.
You can adjust two switches at file top, you will see kernel syscall(2) works
correctly, but glibc fails.

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[Bug libc/29271] clock_nanosleep(2) fails to report EINTR

[steffen at sdaoden dot eu]

https://sourceware.org/bugzilla/show_bug.cgi?id=29271

Steffen (Daode) Nurpmeso <steffen at sdaoden dot eu> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |critical
           Priority|P2                          |P1
                 CC|                            |steffen at sdaoden dot eu

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[Bug libc/29271] clock_nanosleep(2) fails to report EINTR

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=29271

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|critical                    |normal
                 CC|                            |fweimer at redhat dot com
              Flags|                            |security-

--- Comment #1 from Florian Weimer <fweimer at redhat dot com> ---
According to POSIX, clock_nanosleep does not set errno on failure, and the
glibc implementation does not do so, either.

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[Bug libc/29271] clock_nanosleep(2) fails to report EINTR

[adhemerval.zanella at linaro dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29271

Adhemerval Zanella <adhemerval.zanella at linaro dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |adhemerval.zanella at linaro dot o
                   |                            |rg

--- Comment #2 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
As Florian has pointed out, you need to check for clock_nanosleep return code
instead of errno to check if it has failed.  On you example, if it does return
4 (EINTR).

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