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On Wed, Oct 16, 2019 at 08:54:08AM -0700, Alistair Francis wrote: > On Sat, Oct 12, 2019 at 5:24 AM Dmitry V. Levin wrote: > > On Wed, Sep 25, 2019 at 03:55:14PM -0700, Alistair Francis wrote: > > > If the waitpid and wait4 syscalls aren't avaliable (such as y2038 safe > > > 32-bit systems) let us use the waitid syscall isntead. > > > > > > Unfortunately waitid is substantially differnt to waitpid and wait4, so > > > the conversion ends up being complex. > > > > > > For full support we need the 5.4+ kernel as that allows a pid of 0 with > > > the P_PGID idtype. > > > > > > 2019-09-16 Alistair Francis <alistair.francis@wdc.com> > > > > > > * sysdeps/unix/sysv/linux/wait.c: Use the waitid syscall if required. > > > * sysdeps/unix/sysv/linux/waitpid.c: Likewise. > > > * sysdeps/unix/sysv/linux/waitpid_nocancel.c: Likewise. > > > > If wait4 is not available, shouldn't it be emulated as well as waitpid? > > Yes, it is by the changed in wait.c. This change of wait.c affects __libc_wait only, I don't see how it makes wait4 emulated. -- ldv
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