modernc.org/cc@v1.0.1/v2/headers/linux_amd64/usr/include/sys/wait.h (about)

     1  /* Copyright (C) 1991-2015 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     <http://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  #include <signal.h>
    29  /* These macros could also be defined in <stdlib.h>.  */
    30  #if !defined _STDLIB_H || (!defined __USE_XOPEN && !defined __USE_XOPEN2K8)
    31  /* This will define the `W*' macros for the flag
    32     bits to `waitpid', `wait3', and `wait4'.  */
    33  # include <bits/waitflags.h>
    34  # ifdef	__USE_MISC
    35  /* Lots of hair to allow traditional BSD use of `union wait'
    36     as well as POSIX.1 use of `int' for the status word.  */
    37  #  if defined __GNUC__ && !defined __cplusplus
    38  #   define __WAIT_INT(status) \
    39    (__extension__ (((union { __typeof(status) __in; int __i; }) \
    40  		   { .__in = (status) }).__i))
    41  #  else
    42  #   define __WAIT_INT(status)	(*(const int *) &(status))
    43  #  endif
    44  /* This is the type of the argument to `wait'.  The funky union
    45     causes redeclarations with either `int *' or `union wait *' to be
    46     allowed without complaint.  __WAIT_STATUS_DEFN is the type used in
    47     the actual function definitions.  */
    48  #  if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus
    49  #   define __WAIT_STATUS	void *
    50  #   define __WAIT_STATUS_DEFN	void *
    51  #  else
    52  /* This works in GCC 2.6.1 and later.  */
    53      typedef union {
    54  	union wait *__uptr;
    55  	int *__iptr;
    56  } __WAIT_STATUS __attribute__ ((__transparent_union__));
    57  #   define __WAIT_STATUS_DEFN	int *
    58  #  endif
    59  
    60  # else				/* Don't use misc.  */
    61  #  define __WAIT_INT(status)	(status)
    62  #  define __WAIT_STATUS		int *
    63  #  define __WAIT_STATUS_DEFN	int *
    64  # endif				/* Use misc.  */
    65  /* This will define all the `__W*' macros.  */
    66  # include <bits/waitstatus.h>
    67  # define WEXITSTATUS(status)	__WEXITSTATUS (__WAIT_INT (status))
    68  # define WTERMSIG(status)	__WTERMSIG (__WAIT_INT (status))
    69  # define WSTOPSIG(status)	__WSTOPSIG (__WAIT_INT (status))
    70  # define WIFEXITED(status)	__WIFEXITED (__WAIT_INT (status))
    71  # define WIFSIGNALED(status)	__WIFSIGNALED (__WAIT_INT (status))
    72  # define WIFSTOPPED(status)	__WIFSTOPPED (__WAIT_INT (status))
    73  # ifdef __WIFCONTINUED
    74  #  define WIFCONTINUED(status)	__WIFCONTINUED (__WAIT_INT (status))
    75  # endif
    76  #endif				/* <stdlib.h> not included.  */
    77  #ifdef	__USE_MISC
    78  # define WCOREFLAG		__WCOREFLAG
    79  # define WCOREDUMP(status)	__WCOREDUMP (__WAIT_INT (status))
    80  # define W_EXITCODE(ret, sig)	__W_EXITCODE (ret, sig)
    81  # define W_STOPCODE(sig)	__W_STOPCODE (sig)
    82  #endif
    83  /* The following values are used by the `waitid' function.  */
    84  #if defined __USE_XOPEN || defined __USE_XOPEN2K8
    85      typedef enum {
    86  	P_ALL,			/* Wait for any child.  */
    87  	P_PID,			/* Wait for specified process.  */
    88  	P_PGID			/* Wait for members of process group.  */
    89  } idtype_t;
    90  #endif
    91  
    92  /* Wait for a child to die.  When one does, put its status in *STAT_LOC
    93     and return its process ID.  For errors, return (pid_t) -1.
    94  
    95     This function is a cancellation point and therefore not marked with
    96     __THROW.  */
    97  extern __pid_t wait(__WAIT_STATUS __stat_loc);
    98  
    99  #ifdef	__USE_MISC
   100  /* Special values for the PID argument to `waitpid' and `wait4'.  */
   101  # define WAIT_ANY	(-1)	/* Any process.  */
   102  # define WAIT_MYPGRP	0	/* Any process in my process group.  */
   103  #endif
   104  
   105  /* Wait for a child matching PID to die.
   106     If PID is greater than 0, match any process whose process ID is PID.
   107     If PID is (pid_t) -1, match any process.
   108     If PID is (pid_t) 0, match any process with the
   109     same process group as the current process.
   110     If PID is less than -1, match any process whose
   111     process group is the absolute value of PID.
   112     If the WNOHANG bit is set in OPTIONS, and that child
   113     is not already dead, return (pid_t) 0.  If successful,
   114     return PID and store the dead child's status in STAT_LOC.
   115     Return (pid_t) -1 for errors.  If the WUNTRACED bit is
   116     set in OPTIONS, return status for stopped children; otherwise don't.
   117  
   118     This function is a cancellation point and therefore not marked with
   119     __THROW.  */
   120  extern __pid_t waitpid(__pid_t __pid, int *__stat_loc, int __options);
   121  
   122  #if defined __USE_XOPEN || defined __USE_XOPEN2K8
   123  # ifndef __id_t_defined
   124  #  include <bits/types.h>
   125  typedef __id_t id_t;
   126  #  define __id_t_defined
   127  # endif
   128  
   129  # define __need_siginfo_t
   130  # include <bits/siginfo.h>
   131  
   132  /* Wait for a childing matching IDTYPE and ID to change the status and
   133     place appropriate information in *INFOP.
   134     If IDTYPE is P_PID, match any process whose process ID is ID.
   135     If IDTYPE is P_PGID, match any process whose process group is ID.
   136     If IDTYPE is P_ALL, match any process.
   137     If the WNOHANG bit is set in OPTIONS, and that child
   138     is not already dead, clear *INFOP and return 0.  If successful, store
   139     exit code and status in *INFOP.
   140  
   141     This function is a cancellation point and therefore not marked with
   142     __THROW.  */
   143  extern int waitid(idtype_t __idtype, __id_t __id, siginfo_t * __infop, int __options);
   144  #endif
   145  
   146  #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED
   147  /* This being here makes the prototypes valid whether or not
   148     we have already included <sys/resource.h> to define `struct rusage'.  */
   149  struct rusage;
   150  
   151  /* Wait for a child to exit.  When one does, put its status in *STAT_LOC and
   152     return its process ID.  For errors return (pid_t) -1.  If USAGE is not
   153     nil, store information about the child's resource usage there.  If the
   154     WUNTRACED bit is set in OPTIONS, return status for stopped children;
   155     otherwise don't.  */
   156  extern __pid_t wait3(__WAIT_STATUS __stat_loc, int __options, struct rusage *__usage) __THROWNL;
   157  #endif
   158  
   159  #ifdef __USE_MISC
   160  /* PID is like waitpid.  Other args are like wait3.  */
   161  extern __pid_t wait4(__pid_t __pid, __WAIT_STATUS __stat_loc, int __options, struct rusage *__usage) __THROWNL;
   162  #endif				/* Use misc.  */
   163  
   164  __END_DECLS
   165  #endif				/* sys/wait.h  */