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dd535f4f19
It was raised on libc-help [1] that some Linux kernel interfaces expect
the libc to define __USE_TIME_BITS64 to indicate the time_t size for the
kABI. Different than defined by the initial y2038 design document [2],
the __USE_TIME_BITS64 is only defined for ABIs that support more than
one time_t size (by defining the _TIME_BITS for each module).
The 64 bit time_t redirects are now enabled using a different internal
define (__USE_TIME64_REDIRECTS). There is no expected change in semantic
or code generation.
Checked on x86_64-linux-gnu, i686-linux-gnu, aarch64-linux-gnu, and
arm-linux-gnueabi
[1] https://sourceware.org/pipermail/libc-help/2024-January/006557.html
[2] https://sourceware.org/glibc/wiki/Y2038ProofnessDesign
Reviewed-by: DJ Delorie <dj@redhat.com>
(cherry picked from commit a4ed0471d7)
176 lines
6.0 KiB
C
176 lines
6.0 KiB
C
/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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/*
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* POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h>
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*/
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#ifndef _SYS_WAIT_H
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#define _SYS_WAIT_H 1
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#include <features.h>
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__BEGIN_DECLS
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#include <bits/types.h>
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#ifndef __pid_t_defined
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typedef __pid_t pid_t;
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# define __pid_t_defined
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#endif
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#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
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# include <signal.h>
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#endif
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#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
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/* Some older standards require the contents of struct rusage to be
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defined here. */
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# include <bits/types/struct_rusage.h>
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#endif
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/* These macros could also be defined in <stdlib.h>. */
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#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
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/* This will define the `W*' macros for the flag
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bits to `waitpid', `wait3', and `wait4'. */
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# include <bits/waitflags.h>
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/* This will define all the `__W*' macros. */
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# include <bits/waitstatus.h>
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# define WEXITSTATUS(status) __WEXITSTATUS (status)
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# define WTERMSIG(status) __WTERMSIG (status)
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# define WSTOPSIG(status) __WSTOPSIG (status)
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# define WIFEXITED(status) __WIFEXITED (status)
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# define WIFSIGNALED(status) __WIFSIGNALED (status)
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# define WIFSTOPPED(status) __WIFSTOPPED (status)
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# ifdef __WIFCONTINUED
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# define WIFCONTINUED(status) __WIFCONTINUED (status)
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# endif
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#endif /* <stdlib.h> not included. */
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#ifdef __USE_MISC
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# define WCOREFLAG __WCOREFLAG
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# define WCOREDUMP(status) __WCOREDUMP (status)
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# define W_EXITCODE(ret, sig) __W_EXITCODE (ret, sig)
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# define W_STOPCODE(sig) __W_STOPCODE (sig)
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#endif
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/* The following values are used by the `waitid' function. */
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#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
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# include <bits/types/idtype_t.h>
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#endif
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/* Wait for a child to die. When one does, put its status in *STAT_LOC
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and return its process ID. For errors, return (pid_t) -1.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern __pid_t wait (int *__stat_loc);
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#ifdef __USE_MISC
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/* Special values for the PID argument to `waitpid' and `wait4'. */
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# define WAIT_ANY (-1) /* Any process. */
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# define WAIT_MYPGRP 0 /* Any process in my process group. */
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#endif
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/* Wait for a child matching PID to die.
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If PID is greater than 0, match any process whose process ID is PID.
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If PID is (pid_t) -1, match any process.
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If PID is (pid_t) 0, match any process with the
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same process group as the current process.
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If PID is less than -1, match any process whose
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process group is the absolute value of PID.
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If the WNOHANG bit is set in OPTIONS, and that child
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is not already dead, return (pid_t) 0. If successful,
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return PID and store the dead child's status in STAT_LOC.
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Return (pid_t) -1 for errors. If the WUNTRACED bit is
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set in OPTIONS, return status for stopped children; otherwise don't.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
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#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
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# ifndef __id_t_defined
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typedef __id_t id_t;
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# define __id_t_defined
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# endif
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# include <bits/types/siginfo_t.h>
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/* Wait for a childing matching IDTYPE and ID to change the status and
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place appropriate information in *INFOP.
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If IDTYPE is P_PID, match any process whose process ID is ID.
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If IDTYPE is P_PGID, match any process whose process group is ID.
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If IDTYPE is P_ALL, match any process.
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If the WNOHANG bit is set in OPTIONS, and that child
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is not already dead, clear *INFOP and return 0. If successful, store
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exit code and status in *INFOP.
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This function is a cancellation point and therefore not marked with
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__THROW. */
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extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
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int __options);
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#endif
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#if defined __USE_MISC \
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|| (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
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/* This being here makes the prototypes valid whether or not
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we have already included <sys/resource.h> to define `struct rusage'. */
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struct rusage;
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/* Wait for a child to exit. When one does, put its status in *STAT_LOC and
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return its process ID. For errors return (pid_t) -1. If USAGE is not
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nil, store information about the child's resource usage there. If the
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WUNTRACED bit is set in OPTIONS, return status for stopped children;
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otherwise don't. */
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# ifndef __USE_TIME64_REDIRECTS
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extern __pid_t wait3 (int *__stat_loc, int __options,
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struct rusage * __usage) __THROWNL;
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# else
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# ifdef __REDIRECT_NTHNL
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extern __pid_t __REDIRECT_NTHNL (wait3, (int *__stat_loc, int __options,
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struct rusage * __usage),
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__wait3_time64);
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# else
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# define wait3 __wait3_time64
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# endif
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# endif
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#endif
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#ifdef __USE_MISC
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# ifndef __USE_TIME64_REDIRECTS
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/* PID is like waitpid. Other args are like wait3. */
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extern __pid_t wait4 (__pid_t __pid, int *__stat_loc, int __options,
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struct rusage *__usage) __THROWNL;
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# else
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# ifdef __REDIRECT_NTHNL
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extern __pid_t __REDIRECT_NTHNL (wait4, (__pid_t __pid, int *__stat_loc,
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int __options, struct rusage *__usage),
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__wait4_time64);
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# else
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# define wait4 __wait4_time64
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# endif
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# endif
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#endif /* Use misc. */
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__END_DECLS
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#endif /* sys/wait.h */
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