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00001 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc. 00002 This file is part of the GNU C Library. 00003 00004 The GNU C Library is free software; you can redistribute it and/or 00005 modify it under the terms of the GNU Lesser General Public 00006 License as published by the Free Software Foundation; either 00007 version 2.1 of the License, or (at your option) any later version. 00008 00009 The GNU C Library is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 Lesser General Public License for more details. 00013 00014 You should have received a copy of the GNU Lesser General Public 00015 License along with the GNU C Library; if not, write to the Free 00016 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 00017 02111-1307 USA. */ 00018 00019 #include <kernel-features.h> 00020 00021 /* We have to and actually can handle cancelable system(). The big 00022 problem: we have to kill the child process if necessary. To do 00023 this a cleanup handler has to be registered and is has to be able 00024 to find the PID of the child. The main problem is to reliable have 00025 the PID when needed. It is not necessary for the parent thread to 00026 return. It might still be in the kernel when the cancellation 00027 request comes. Therefore we have to use the clone() calls ability 00028 to have the kernel write the PID into the user-level variable. */ 00029 #ifdef __ASSUME_CLONE_THREAD_FLAGS 00030 # define FORK() \ 00031 INLINE_SYSCALL (clone2, 6, CLONE_PARENT_SETTID | SIGCHLD, NULL, 0, \ 00032 &pid, NULL, NULL) 00033 #endif 00034 00035 #include "../system.c"