include/sys/fork.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _SYS_FORK_H
  28 #define _SYS_FORK_H
  29
  30 #include <sys/types.h>
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
  37
  38 #if !defined(_KERNEL)
  39
  40 extern pid_t forkx(int);
  41 extern pid_t forkallx(int);
  42 extern pid_t vforkx(int) __RETURNS_TWICE;
  43
  44 #pragma unknown_control_flow(vforkx)
  45
  46 #endif  /* !defined(_KERNEL) */
  47
  48 /*
  49  * The argument to any of the forkx() functions is a set of flags
  50  * formed by or-ing together zero or more of the following flags.
  51  * fork()/forkall()/vfork() are equivalent to the corresponding
  52  * forkx()/forkallx()/vforkx() functions with a zero argument.
  53  */
  54
  55 /*
  56  * Do not post a SIGCHLD signal to the parent when the child terminates,
  57  * regardless of the disposition of the SIGCHLD signal in the parent.
  58  * SIGCHLD signals are still possible for job control stop and continue
  59  * actions (CLD_STOPPED, CLD_CONTINUED) if the parent has requested them.
  60  */
  61 #define FORK_NOSIGCHLD  0x0001
  62
  63 /*
  64  * Do not allow wait-for-multiple-pids by the parent, as in waitid(P_ALL)
  65  * or waitid(P_PGID), to reap the child and do not allow the child to
  66  * be reaped automatically due the disposition of the SIGCHLD signal
  67  * being set to be ignored.  Only a specific wait for the child, as
  68  * in waitid(P_PID, pid), is allowed and it is required, else when
  69  * the child exits it will remain a zombie until the parent exits.
  70  */
  71 #define FORK_WAITPID    0x0002
  72
  73 #endif  /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
  74
  75 #ifdef  __cplusplus
  76 }
  77 #endif
  78
  79 #endif  /* _SYS_FORK_H */