usr/src/uts/common/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 2006 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 #pragma ident   "%Z%%M% %I%     %E% SMI"
  31
  32 #include <sys/types.h>
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #if !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__)
  39
  40 #if !defined(_KERNEL)
  41
  42 extern pid_t forkx(int);
  43 extern pid_t forkallx(int);
  44 extern pid_t vforkx(int);
  45
  46 #if defined(__sparc)
  47 #pragma unknown_control_flow(vforkx)
  48 #endif
  49
  50 #endif  /* !defined(_KERNEL) */
  51
  52 /*
  53  * The argument to any of the forkx() functions is a set of flags
  54  * formed by or-ing together zero or more of the following flags.
  55  * fork()/forkall()/vfork() are equivalent to the corresponding
  56  * forkx()/forkallx()/vforkx() functions with a zero argument.
  57  */
  58
  59 /*
  60  * Do not post a SIGCHLD signal to the parent when the child terminates,
  61  * regardless of the disposition of the SIGCHLD signal in the parent.
  62  * SIGCHLD signals are still possible for job control stop and continue
  63  * actions (CLD_STOPPED, CLD_CONTINUED) if the parent has requested them.
  64  */
  65 #define FORK_NOSIGCHLD  0x0001
  66
  67 /*
  68  * Do not allow wait-for-multiple-pids by the parent, as in waitid(P_ALL)
  69  * or waitid(P_PGID), to reap the child and do not allow the child to
  70  * be reaped automatically due the disposition of the SIGCHLD signal
  71  * being set to be ignored.  Only a specific wait for the child, as
  72  * in waitid(P_PID, pid), is allowed and it is required, else when
  73  * the child exits it will remain a zombie until the parent exits.
  74  */
  75 #define FORK_WAITPID    0x0002
  76
  77 #endif  /* !defined(__XOPEN_OR_POSIX) || defined(__EXTENSIONS__) */
  78
  79 #ifdef  __cplusplus
  80 }
  81 #endif
  82
  83 #endif  /* _SYS_FORK_H */