The C and C++ Include Header Files

/usr/include/x86_64-linux-gnu/sys/wait.h


$ cat -n /usr/include/x86_64-linux-gnu/sys/wait.h

     1	/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	/*
    19	 *	POSIX Standard: 3.2.1 Wait for Process Termination	<sys/wait.h>
    20	 */
    21	
    22	#ifndef	_SYS_WAIT_H
    23	#define	_SYS_WAIT_H	1
    24	
    25	#include <features.h>
    26	
    27	__BEGIN_DECLS
    28	
    29	#include <bits/types.h>
    30	#ifndef __pid_t_defined
    31	typedef __pid_t pid_t;
    32	# define __pid_t_defined
    33	#endif
    34	
    35	#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
    36	# include <signal.h>
    37	#endif
    38	
    39	#if defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K8
    40	/* Some older standards require the contents of struct rusage to be
    41	   defined here.  */
    42	# include <bits/types/struct_rusage.h>
    43	#endif
    44	
    45	/* These macros could also be defined in <stdlib.h>.  */
    46	#if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
    47	/* This will define the `W*' macros for the flag
    48	   bits to `waitpid', `wait3', and `wait4'.  */
    49	# include <bits/waitflags.h>
    50	
    51	/* This will define all the `__W*' macros.  */
    52	# include <bits/waitstatus.h>
    53	
    54	# define WEXITSTATUS(status)	__WEXITSTATUS (status)
    55	# define WTERMSIG(status)	__WTERMSIG (status)
    56	# define WSTOPSIG(status)	__WSTOPSIG (status)
    57	# define WIFEXITED(status)	__WIFEXITED (status)
    58	# define WIFSIGNALED(status)	__WIFSIGNALED (status)
    59	# define WIFSTOPPED(status)	__WIFSTOPPED (status)
    60	# ifdef __WIFCONTINUED
    61	#  define WIFCONTINUED(status)	__WIFCONTINUED (status)
    62	# endif
    63	#endif	/* <stdlib.h> not included.  */
    64	
    65	#ifdef	__USE_MISC
    66	# define WCOREFLAG		__WCOREFLAG
    67	# define WCOREDUMP(status)	__WCOREDUMP (status)
    68	# define W_EXITCODE(ret, sig)	__W_EXITCODE (ret, sig)
    69	# define W_STOPCODE(sig)	__W_STOPCODE (sig)
    70	#endif
    71	
    72	/* The following values are used by the `waitid' function.  */
    73	#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
    74	# include <bits/types/idtype_t.h>
    75	#endif
    76	
    77	
    78	/* Wait for a child to die.  When one does, put its status in *STAT_LOC
    79	   and return its process ID.  For errors, return (pid_t) -1.
    80	
    81	   This function is a cancellation point and therefore not marked with
    82	   __THROW.  */
    83	extern __pid_t wait (int *__stat_loc);
    84	
    85	#ifdef	__USE_MISC
    86	/* Special values for the PID argument to `waitpid' and `wait4'.  */
    87	# define WAIT_ANY	(-1)	/* Any process.  */
    88	# define WAIT_MYPGRP	0	/* Any process in my process group.  */
    89	#endif
    90	
    91	/* Wait for a child matching PID to die.
    92	   If PID is greater than 0, match any process whose process ID is PID.
    93	   If PID is (pid_t) -1, match any process.
    94	   If PID is (pid_t) 0, match any process with the
    95	   same process group as the current process.
    96	   If PID is less than -1, match any process whose
    97	   process group is the absolute value of PID.
    98	   If the WNOHANG bit is set in OPTIONS, and that child
    99	   is not already dead, return (pid_t) 0.  If successful,
   100	   return PID and store the dead child's status in STAT_LOC.
   101	   Return (pid_t) -1 for errors.  If the WUNTRACED bit is
   102	   set in OPTIONS, return status for stopped children; otherwise don't.
   103	
   104	   This function is a cancellation point and therefore not marked with
   105	   __THROW.  */
   106	extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options);
   107	
   108	#if defined __USE_XOPEN_EXTENDED || defined __USE_XOPEN2K8
   109	# ifndef __id_t_defined
   110	typedef __id_t id_t;
   111	#  define __id_t_defined
   112	# endif
   113	
   114	# include <bits/types/siginfo_t.h>
   115	
   116	/* Wait for a childing matching IDTYPE and ID to change the status and
   117	   place appropriate information in *INFOP.
   118	   If IDTYPE is P_PID, match any process whose process ID is ID.
   119	   If IDTYPE is P_PGID, match any process whose process group is ID.
   120	   If IDTYPE is P_ALL, match any process.
   121	   If the WNOHANG bit is set in OPTIONS, and that child
   122	   is not already dead, clear *INFOP and return 0.  If successful, store
   123	   exit code and status in *INFOP.
   124	
   125	   This function is a cancellation point and therefore not marked with
   126	   __THROW.  */
   127	extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop,
   128			   int __options);
   129	#endif
   130	
   131	#if defined __USE_MISC \
   132	    || (defined __USE_XOPEN_EXTENDED && !defined __USE_XOPEN2K)
   133	/* This being here makes the prototypes valid whether or not
   134	   we have already included <sys/resource.h> to define `struct rusage'.  */
   135	struct rusage;
   136	
   137	/* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
   138	   return its process ID.  For errors return (pid_t) -1.  If USAGE is not
   139	   nil, store information about the child's resource usage there.  If the
   140	   WUNTRACED bit is set in OPTIONS, return status for stopped children;
   141	   otherwise don't.  */
   142	# ifndef __USE_TIME_BITS64
   143	extern __pid_t wait3 (int *__stat_loc, int __options,
   144			      struct rusage * __usage) __THROWNL;
   145	# else
   146	#  ifdef __REDIRECT_NTHNL
   147	extern __pid_t __REDIRECT_NTHNL (wait3, (int *__stat_loc, int __options,
   148	                                         struct rusage * __usage),
   149	                                 __wait3_time64);
   150	#  else
   151	#   define wait3 __wait3_time64
   152	#  endif
   153	# endif
   154	#endif
   155	
   156	#ifdef __USE_MISC
   157	# ifndef __USE_TIME_BITS64
   158	/* PID is like waitpid.  Other args are like wait3.  */
   159	extern __pid_t wait4 (__pid_t __pid, int *__stat_loc, int __options,
   160			      struct rusage *__usage) __THROWNL;
   161	# else
   162	#  ifdef __REDIRECT_NTHNL
   163	extern __pid_t __REDIRECT_NTHNL (wait4, (__pid_t __pid, int *__stat_loc,
   164	                                         int __options, struct rusage *__usage),
   165	                                 __wait4_time64);
   166	#  else
   167	#   define wait4 __wait4_time64
   168	#  endif
   169	# endif
   170	#endif /* Use misc.  */
   171	
   172	
   173	__END_DECLS
   174	
   175	#endif /* sys/wait.h  */