[glibc/fw/builtin-syscalls-4] Implement wait in terms of waitpid

[glibc/fw/builtin-syscalls-4] Implement wait in terms of waitpid

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=c5cbdacb8acec54e140c879393c8c7dd658c3488

commit c5cbdacb8acec54e140c879393c8c7dd658c3488
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date:   Wed Nov 13 13:30:46 2019 -0300

    Implement wait in terms of waitpid
    
    The POSIX implementation is used as default and both BSD and Linux
    version are removed.  It simplifies the implementation for
    architectures that do not provide either __NR_waitpid or
    __NR_wait4.
    
    Checked on x86_64-linux-gnu and powerpc64le-linux-gnu.

Diff:
---
 posix/wait.c                   |  6 +-----
 sysdeps/posix/wait.c           | 30 ------------------------------
 sysdeps/unix/bsd/wait.c        | 32 --------------------------------
 sysdeps/unix/sysv/linux/wait.c | 35 -----------------------------------
 4 files changed, 1 insertion(+), 102 deletions(-)

diff --git a/posix/wait.c b/posix/wait.c
index 0acd1e4..5706472 100644
--- a/posix/wait.c
+++ b/posix/wait.c
@@ -16,16 +16,12 @@
    <https://www.gnu.org/licenses/>.  */
 
 #include <sys/wait.h>
-#include <errno.h>
 
 /* Wait for a child to die.  When one does, put its status in *STAT_LOC
    and return its process ID.  For errors, return (pid_t) -1.  */
 __pid_t
 __wait (int *stat_loc)
 {
-  __set_errno (ENOSYS);
-  return -1;
+  return __waitpid (WAIT_ANY, stat_loc, 0);
 }
-stub_warning (wait)
-
 weak_alias (__wait, wait)
diff --git a/sysdeps/posix/wait.c b/sysdeps/posix/wait.c
deleted file mode 100644
index 573aa47..0000000
--- a/sysdeps/posix/wait.c
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sys/wait.h>
-
-
-/* Wait for a child to die.  When one does, put its status in *STAT_LOC
-   and return its process ID.  For errors, return (pid_t) -1.  */
-__pid_t
-__libc_wait (int *stat_loc)
-{
-  return __waitpid (WAIT_ANY, (int *) stat_loc, 0);
-}
-
-weak_alias (__libc_wait, __wait)
-weak_alias (__libc_wait, wait)
diff --git a/sysdeps/unix/bsd/wait.c b/sysdeps/unix/bsd/wait.c
deleted file mode 100644
index 3207d96..0000000
--- a/sysdeps/unix/bsd/wait.c
+++ /dev/null
@@ -1,32 +0,0 @@
-/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sys/wait.h>
-#include <errno.h>
-#include <sys/resource.h>
-#include <stddef.h>
-
-/* Wait for a child to die.  When one does, put its status in *STAT_LOC
-   and return its process ID.  For errors, return (pid_t) -1.  */
-__pid_t
-__libc_wait (int *stat_loc)
-{
-  return __wait4 (WAIT_ANY, stat_loc, 0, (struct rusage *) NULL);
-}
-
-weak_alias (__libc_wait, __wait)
-weak_alias (__libc_wait, wait)
diff --git a/sysdeps/unix/sysv/linux/wait.c b/sysdeps/unix/sysv/linux/wait.c
deleted file mode 100644
index c2385c7..0000000
--- a/sysdeps/unix/sysv/linux/wait.c
+++ /dev/null
@@ -1,35 +0,0 @@
-/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
-
-   The GNU C Library is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, see
-   <https://www.gnu.org/licenses/>.  */
-
-#include <sys/wait.h>
-#include <errno.h>
-#include <sys/resource.h>
-#include <stddef.h>
-#include <sysdep-cancel.h>
-
-/* Wait for a child to die.  When one does, put its status in *STAT_LOC
-   and return its process ID.  For errors, return (pid_t) -1.  */
-pid_t
-__libc_wait (int *stat_loc)
-{
-  pid_t result = SYSCALL_CANCEL (wait4, WAIT_ANY, stat_loc, 0,
-				 (struct rusage *) NULL);
-  return result;
-}
-
-weak_alias (__libc_wait, __wait)
-weak_alias (__libc_wait, wait)