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d4697bc9 | 1 | /* Copyright (C) 2003-2014 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
8 | ||
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Lesser General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
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15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
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17 | |
18 | #include <kernel-features.h> | |
19 | ||
20 | /* We have to and actually can handle cancelable system(). The big | |
21 | problem: we have to kill the child process if necessary. To do | |
22 | this a cleanup handler has to be registered and is has to be able | |
23 | to find the PID of the child. The main problem is to reliable have | |
24 | the PID when needed. It is not necessary for the parent thread to | |
25 | return. It might still be in the kernel when the cancellation | |
26 | request comes. Therefore we have to use the clone() calls ability | |
27 | to have the kernel write the PID into the user-level variable. */ | |
f2c05b9e | 28 | #define FORK() \ |
2e119864 | 29 | INLINE_SYSCALL (clone, 3, 0, CLONE_PARENT_SETTID | SIGCHLD, &pid) |
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30 | |
31 | #include "../system.c" |