| /* Pseudo implementation of waitid. |
| Copyright (C) 1997, 1998, 2000, 2002 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1997. |
| |
| 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. */ |
| |
| #include <errno.h> |
| #include <signal.h> |
| #define __need_NULL |
| #include <stddef.h> |
| #include <sys/wait.h> |
| #include <sys/types.h> |
| |
| #include <assert.h> |
| |
| extern pid_t kwaitpid (int *stat_loc, pid_t pid, int options, |
| struct rusage *ru_loc, siginfo_t *infop); |
| |
| int |
| __waitid (idtype, id, infop, options) |
| idtype_t idtype; |
| id_t id; |
| siginfo_t *infop; |
| int options; |
| { |
| pid_t pid, child; |
| int status; |
| |
| switch (idtype) |
| { |
| case P_PID: |
| if(id <= 0) |
| goto invalid; |
| pid = (pid_t) id; |
| break; |
| case P_PGID: |
| if (id < 0 || id == 1) |
| goto invalid; |
| pid = (pid_t) -id; |
| break; |
| case P_ALL: |
| pid = -1; |
| break; |
| default: |
| invalid: |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| /* Technically we're supposed to return EFAULT if infop is bogus, |
| but that would involve mucking with signals, which is |
| too much hassle. User will have to deal with SIGSEGV/SIGBUS. |
| We just check for a null pointer. */ |
| |
| if (infop == NULL) |
| { |
| __set_errno (EFAULT); |
| return -1; |
| } |
| |
| child = kwaitpid (&status, pid, options, NULL, infop); |
| |
| if (child == -1) |
| /* `waitpid' set `errno' for us. */ |
| return -1; |
| |
| return 0; |
| } |
| weak_alias (__waitid, waitid) |