source: trunk/kernel/syscalls/sys_signal.c @ 23

Last change on this file since 23 was 23, checked in by alain, 5 years ago

Introduce syscalls.

File size: 1.6 KB
RevLine 
[1]1/*
[23]2 * sys_signal.c - associate a specific signal handler to a given signal.
[1]3 *
[23]4 * Authors   Ghassan Almaless (2008,2009,2010,2011,2012)
5 *           Alain Greiner (2016,2017)
[1]6 *
[23]7 * Copyright (c) UPMC Sorbonne Universites
8 *
[1]9 * This file is part of ALMOS-kernel.
10 *
11 * ALMOS-kernel is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; version 2.0 of the License.
14 *
15 * ALMOS-kernel is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
22 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
[23]25#include <hal_types.h>
[1]26#include <errno.h>
27#include <thread.h>
[23]28#include <printk.h>
[1]29#include <signal.h>
30
[23]31//////////////////////////////////
32int sys_signal( uint32_t   sig_id,
33                void     * handler )
[1]34{ 
[23]35        thread_t  * this = CURRENT_THREAD;
[1]36
[23]37        if((sig_id == 0) || (sig_id >= SIG_NR) || (sig_id == SIGKILL) || (sig_id == SIGSTOP))
[1]38        {
[23]39        printk("\n[ERROR] in %s : illega signal index = %d\n", __FUNCTION__ , sig_id );
40                this->errno = EINVAL;
41                return -1;
[1]42        }
43
[23]44        // register handler in signal manager for the calling process
45        this->process->sig_mgr.sigactions[sig_id] = handler;
[1]46
[23]47        signal_dmsg("\n[INFO] %s : handler @%x has been registred for signal %d\n",
48                    __FUNCTION__ , handler , sig_id );
[1]49
50        return 0;
51}
52
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