sysdeps/unix/bsd/sun/sunos4/wait4.c

   1 /* This implements wait4 with the 4.4 BSD semantics (also those documented in
   2    SunOS 4.1) on top of SunOS's wait4 system call, which has semantics
   3    different from those documented.  Go Sun!
   4    Copyright (C) 1991,1992,1993,1995,1997,2004 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, write to the Free
  19    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  20    02111-1307 USA.  */
  21
  22 #include <sys/types.h>
  23 #include <sys/wait.h>
  24 #include <unistd.h>
  25
  26 extern pid_t __wait4_syscall (pid_t pid, __WAIT_STATUS_DEFN stat_loc,
  27                               int options, struct rusage *usage);
  28
  29 pid_t
  30 __wait4 (pid, stat_loc, options, usage)
  31      pid_t pid;
  32      __WAIT_STATUS_DEFN stat_loc;
  33      int options;
  34      struct rusage *usage;
  35 {
  36   switch (pid)
  37     {
  38     case WAIT_ANY:
  39       pid = 0;
  40       break;
  41
  42     case WAIT_MYPGRP:
  43       pid = - getpgrp ();
  44       break;
  45     }
  46
  47   return __wait4_syscall (pid, stat_loc, options, usage);
  48 }
  49
  50 weak_alias (__wait4, wait4)