/usr/include/cxxtools/posix/fork.h is in libcxxtools-dev 2.2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | /*
* Copyright (C) 2007 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef CXXTOOLS_FORK_H
#define CXXTOOLS_FORK_H
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <cxxtools/systemerror.h>
namespace cxxtools
{
namespace posix
{
/** A simple wrapper for the system function fork(2).
*
* The advantage of using this class instead of fork directly is, easyness,
* robustness and readability due to less code. The constructor executes
* fork(2) and does error checking. The destructor waits for the child
* process, which prevents the creation of zombie processes. The user may
* decide to deactivate it or waiting explicitely to receive the return
* status, but this has to be done explicitely, which helps robustness.
*
* Example:
* \code
* {
* cxxtools::Fork process;
* if (process.child())
* {
* // we are in the child process here.
*
* exit(0); // normally the child either exits or execs an other
* // process
* }
* }
* \endcode
*/
class Fork
{
Fork(const Fork&);
Fork& operator= (const Fork&);
pid_t pid;
public:
Fork(bool now = true)
: pid(0)
{
if (now)
fork();
}
~Fork()
{
if (pid)
wait();
}
void fork()
{
pid = ::fork();
if (pid < 0)
throw SystemError("fork");
}
pid_t getPid() const { return pid; }
bool parent() const { return pid > 0; }
bool child() const { return !parent(); }
void setNowait() { pid = 0; }
int wait(int options = 0)
{
int status;
::waitpid(pid, &status, options);
pid = 0;
return status;
}
};
}
}
#endif // CXXTOOLS_FORK_H
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