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/* Copyright (C) 1991-1994,1996-2001,2003,2004,2005 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ /* * POSIX Standard: 3.2.1 Wait for Process Termination <sys/wait.h> */ #ifndef _SYS_WAIT_H #define _SYS_WAIT_H 1 #include <features.h> __BEGIN_DECLS #include <signal.h> #include <sys/resource.h> /* These macros could also be defined in <stdlib.h>. */ #if !defined _STDLIB_H || !defined __USE_XOPEN /* This will define the `W*' macros for the flag bits to `waitpid', `wait3', and `wait4'. */ # include <bits/waitflags.h> # ifdef __USE_BSD /* Lots of hair to allow traditional BSD use of `union wait' as well as POSIX.1 use of `int' for the status word. */ # if defined __GNUC__ && !defined __cplusplus # define __WAIT_INT(status) \ (__extension__ (((union { __typeof(status) __in; int __i; }) \ { .__in = (status) }).__i)) # else # define __WAIT_INT(status) (*(__const int *) &(status)) # endif /* This is the type of the argument to `wait'. The funky union causes redeclarations with ether `int *' or `union wait *' to be allowed without complaint. __WAIT_STATUS_DEFN is the type used in the actual function definitions. */ # if !defined __GNUC__ || __GNUC__ < 2 || defined __cplusplus # define __WAIT_STATUS void * # define __WAIT_STATUS_DEFN void * # else /* This works in GCC 2.6.1 and later. */ typedef union { union wait *__uptr; int *__iptr; } __WAIT_STATUS __attribute__ ((__transparent_union__)); # define __WAIT_STATUS_DEFN int * # endif # else /* Don't use BSD. */ # define __WAIT_INT(status) (status) # define __WAIT_STATUS int * # define __WAIT_STATUS_DEFN int * # endif /* Use BSD. */ /* This will define all the `__W*' macros. */ # include <bits/waitstatus.h> # define WEXITSTATUS(status) __WEXITSTATUS(__WAIT_INT(status)) # define WTERMSIG(status) __WTERMSIG(__WAIT_INT(status)) # define WSTOPSIG(status) __WSTOPSIG(__WAIT_INT(status)) # define WIFEXITED(status) __WIFEXITED(__WAIT_INT(status)) # define WIFSIGNALED(status) __WIFSIGNALED(__WAIT_INT(status)) # define WIFSTOPPED(status) __WIFSTOPPED(__WAIT_INT(status)) # ifdef __WIFCONTINUED # define WIFCONTINUED(status) __WIFCONTINUED(__WAIT_INT(status)) # endif #endif /* <stdlib.h> not included. */ #ifdef __USE_BSD # define WCOREFLAG __WCOREFLAG # define WCOREDUMP(status) __WCOREDUMP(__WAIT_INT(status)) # define W_EXITCODE(ret, sig) __W_EXITCODE(ret, sig) # define W_STOPCODE(sig) __W_STOPCODE(sig) #endif /* The following values are used by the `waitid' function. */ #if defined __USE_SVID || defined __USE_XOPEN typedef enum { P_ALL, /* Wait for any child. */ P_PID, /* Wait for specified process. */ P_PGID /* Wait for members of process group. */ } idtype_t; #endif /* 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. This function is a cancellation point and therefore not marked with __THROW. */ extern __pid_t wait (__WAIT_STATUS __stat_loc); #ifdef __USE_BSD /* Special values for the PID argument to `waitpid' and `wait4'. */ # define WAIT_ANY (-1) /* Any process. */ # define WAIT_MYPGRP 0 /* Any process in my process group. */ #endif /* Wait for a child matching PID to die. If PID is greater than 0, match any process whose process ID is PID. If PID is (pid_t) -1, match any process. If PID is (pid_t) 0, match any process with the same process group as the current process. If PID is less than -1, match any process whose process group is the absolute value of PID. If the WNOHANG bit is set in OPTIONS, and that child is not already dead, return (pid_t) 0. If successful, return PID and store the dead child's status in STAT_LOC. Return (pid_t) -1 for errors. If the WUNTRACED bit is set in OPTIONS, return status for stopped children; otherwise don't. This function is a cancellation point and therefore not marked with __THROW. */ extern __pid_t waitpid (__pid_t __pid, int *__stat_loc, int __options); #if defined __USE_SVID || defined __USE_XOPEN # define __need_siginfo_t # include <bits/siginfo.h> /* Wait for a childing matching IDTYPE and ID to change the status and place appropriate information in *INFOP. If IDTYPE is P_PID, match any process whose process ID is ID. If IDTYPE is P_PGID, match any process whose process group is ID. If IDTYPE is P_ALL, match any process. If the WNOHANG bit is set in OPTIONS, and that child is not already dead, clear *INFOP and return 0. If successful, store exit code and status in *INFOP. This function is a cancellation point and therefore not marked with __THROW. */ extern int waitid (idtype_t __idtype, __id_t __id, siginfo_t *__infop, int __options); #endif #if defined __USE_BSD || defined __USE_XOPEN_EXTENDED /* This being here makes the prototypes valid whether or not we have already included <sys/resource.h> to define `struct rusage'. */ struct rusage; /* Wait for a child to exit. When one does, put its status in *STAT_LOC and return its process ID. For errors return (pid_t) -1. If USAGE is not nil, store information about the child's resource usage there. If the WUNTRACED bit is set in OPTIONS, return status for stopped children; otherwise don't. */ extern __pid_t wait3 (__WAIT_STATUS __stat_loc, int __options, struct rusage * __usage) __THROW; #endif #ifdef __USE_BSD /* This being here makes the prototypes valid whether or not we have already included <sys/resource.h> to define `struct rusage'. */ struct rusage; /* PID is like waitpid. Other args are like wait3. */ extern __pid_t wait4 (__pid_t __pid, __WAIT_STATUS __stat_loc, int __options, struct rusage *__usage) __THROW; #endif /* Use BSD. */ __END_DECLS #endif /* sys/wait.h */