mirror of
https://github.com/RGBCube/serenity
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92 lines
2.8 KiB
C++
92 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Syscall.h>
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#include <assert.h>
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#include <sys/wait.h>
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#include <unistd.h>
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extern "C" {
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pid_t wait(int* wstatus)
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{
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return waitpid(-1, wstatus, 0);
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}
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pid_t waitpid(pid_t waitee, int* wstatus, int options)
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{
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siginfo_t siginfo;
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idtype_t idtype;
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id_t id;
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if (waitee < -1) {
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idtype = P_PGID;
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id = -waitee;
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} else if (waitee == -1) {
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idtype = P_ALL;
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id = 0;
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} else if (waitee == 0) {
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idtype = P_PGID;
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id = getgid();
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} else {
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idtype = P_PID;
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id = waitee;
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}
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int rc = waitid(idtype, id, &siginfo, options | WEXITED);
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if (rc < 0)
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return rc;
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if (wstatus) {
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switch (siginfo.si_code) {
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case CLD_EXITED:
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*wstatus = siginfo.si_status << 8;
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break;
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case CLD_KILLED:
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*wstatus = siginfo.si_status;
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break;
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case CLD_STOPPED:
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*wstatus = siginfo.si_status << 8 | 0x7f;
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break;
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case CLD_CONTINUED:
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*wstatus = 0;
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return 0; // return 0 if running
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default:
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ASSERT_NOT_REACHED();
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}
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}
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return siginfo.si_pid;
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}
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int waitid(idtype_t idtype, id_t id, siginfo_t* infop, int options)
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{
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Syscall::SC_waitid_params params { idtype, id, infop, options };
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int rc = syscall(SC_waitid, ¶ms);
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__RETURN_WITH_ERRNO(rc, rc, -1);
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}
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}
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