mirror of
https://github.com/debauchee/barrier.git
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82 lines
1.7 KiB
C++
82 lines
1.7 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "CArchDaemonUnix.h"
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#include "XArchUnix.h"
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <cstdlib>
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//
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// CArchDaemonUnix
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//
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CArchDaemonUnix::CArchDaemonUnix()
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{
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// do nothing
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}
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CArchDaemonUnix::~CArchDaemonUnix()
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{
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// do nothing
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}
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int
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CArchDaemonUnix::daemonize(const char* name, DaemonFunc func)
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{
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int dummy;
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// fork so shell thinks we're done and so we're not a process
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// group leader
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switch (fork()) {
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case -1:
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// failed
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throw XArchDaemonFailed(new XArchEvalUnix(errno));
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case 0:
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// child
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break;
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default:
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// parent exits
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exit(0);
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}
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// become leader of a new session
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setsid();
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// chdir to root so we don't keep mounted filesystems points busy
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dummy = chdir("/");
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// mask off permissions for any but owner
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umask(077);
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// close open files. we only expect stdin, stdout, stderr to be open.
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close(0);
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close(1);
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close(2);
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// attach file descriptors 0, 1, 2 to /dev/null so inadvertent use
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// of standard I/O safely goes in the bit bucket.
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open("/dev/null", O_RDONLY);
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open("/dev/null", O_RDWR);
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dummy = dup(1);
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// invoke function
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return func(1, &name);
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}
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