mirror of https://github.com/sheumann/hush.git
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
/*
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* Copyright (c) 2014 Stephen Heumann
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR 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
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <unistd.h>
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#include <errno.h>
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#ifdef __GNO__
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# include <gno/gno.h>
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# include <gno/kvm.h>
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#endif
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#ifndef __GNO__
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int tc_set_to_my_pgrp(int fd)
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{
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return tcsetpgrp(fd, getpgrp());
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}
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#else
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int tc_set_to_my_pgrp(int fd)
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{
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return tctpgrp(fd, getpid());
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}
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/* We implement tcsetpgrp by searching the process table for a process
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* in the right pgrp and calling tctpgrp using that process.
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*/
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int tcsetpgrp(int fd, pid_t pgrp)
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{
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kvmt *kvm_context;
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struct pentry *proc_entry;
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int result = 1;
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kvm_context = kvm_open();
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if (kvm_context == NULL)
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return -1;
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while ((proc_entry = kvmnextproc(kvm_context)) != NULL) {
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if (proc_entry->pgrp == pgrp) {
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if (tctpgrp(fd, kvm_context->pid) != -1) {
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result = 0;
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break;
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} else {
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result = -1;
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}
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}
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}
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kvm_close(kvm_context);
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if (result == 1) { /* if we didn't find a matching process */
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result = -1;
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errno = ESRCH;
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}
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return result;
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}
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#endif
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