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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QCORE_UNIX_P_H
#define QCORE_UNIX_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of Qt code on Unix. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "qplatformdefs.h"
#ifndef Q_OS_UNIX
# error "qcore_unix_p.h included on a non-Unix system"
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#if defined(Q_OS_VXWORKS)
# include <ioLib.h>
#endif
struct sockaddr;
#if defined(Q_OS_LINUX) && defined(__GLIBC__) && (__GLIBC__ * 0x100 + __GLIBC_MINOR__) >= 0x0204
// Linux supports thread-safe FD_CLOEXEC
# define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 1
// add defines for the consts for Linux
# ifndef O_CLOEXEC
# define O_CLOEXEC 02000000
# endif
# ifndef FD_DUPFD_CLOEXEC
# define F_DUPFD_CLOEXEC 1030
# endif
# ifndef SOCK_CLOEXEC
# define SOCK_CLOEXEC O_CLOEXEC
# endif
# ifndef SOCK_NONBLOCK
# define SOCK_NONBLOCK O_NONBLOCK
# endif
# ifndef MSG_CMSG_CLOEXEC
# define MSG_CMSG_CLOEXEC 0x40000000
# endif
QT_BEGIN_NAMESPACE
namespace QtLibcSupplement {
Q_CORE_EXPORT int accept4(int, sockaddr *, QT_SOCKLEN_T *, int flags);
Q_CORE_EXPORT int dup3(int oldfd, int newfd, int flags);
Q_CORE_EXPORT int pipe2(int pipes[], int flags);
}
QT_END_NAMESPACE
using namespace QT_PREPEND_NAMESPACE(QtLibcSupplement);
#else
# define QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC 0
#endif
#define EINTR_LOOP(var, cmd) \
do { \
var = cmd; \
} while (var == -1 && errno == EINTR)
QT_BEGIN_NAMESPACE
// Internal operator functions for timevals
inline timeval &normalizedTimeval(timeval &t)
{
while (t.tv_usec > 1000000l) {
++t.tv_sec;
t.tv_usec -= 1000000l;
}
while (t.tv_usec < 0l) {
--t.tv_sec;
t.tv_usec += 1000000l;
}
return t;
}
inline bool operator<(const timeval &t1, const timeval &t2)
{ return t1.tv_sec < t2.tv_sec || (t1.tv_sec == t2.tv_sec && t1.tv_usec < t2.tv_usec); }
inline bool operator==(const timeval &t1, const timeval &t2)
{ return t1.tv_sec == t2.tv_sec && t1.tv_usec == t2.tv_usec; }
inline timeval &operator+=(timeval &t1, const timeval &t2)
{
t1.tv_sec += t2.tv_sec;
t1.tv_usec += t2.tv_usec;
return normalizedTimeval(t1);
}
inline timeval operator+(const timeval &t1, const timeval &t2)
{
timeval tmp;
tmp.tv_sec = t1.tv_sec + t2.tv_sec;
tmp.tv_usec = t1.tv_usec + t2.tv_usec;
return normalizedTimeval(tmp);
}
inline timeval operator-(const timeval &t1, const timeval &t2)
{
timeval tmp;
tmp.tv_sec = t1.tv_sec - (t2.tv_sec - 1);
tmp.tv_usec = t1.tv_usec - (t2.tv_usec + 1000000);
return normalizedTimeval(tmp);
}
inline timeval operator*(const timeval &t1, int mul)
{
timeval tmp;
tmp.tv_sec = t1.tv_sec * mul;
tmp.tv_usec = t1.tv_usec * mul;
return normalizedTimeval(tmp);
}
// don't call QT_OPEN or ::open
// call qt_safe_open
static inline int qt_safe_open(const char *pathname, int flags, mode_t mode = 0777)
{
#ifdef O_CLOEXEC
flags |= O_CLOEXEC;
#endif
register int fd;
EINTR_LOOP(fd, QT_OPEN(pathname, flags, mode));
// unknown flags are ignored, so we have no way of verifying if
// O_CLOEXEC was accepted
if (fd != -1)
::fcntl(fd, F_SETFD, FD_CLOEXEC);
return fd;
}
#undef QT_OPEN
#define QT_OPEN qt_safe_open
#ifndef Q_OS_VXWORKS // no POSIX pipes in VxWorks
// don't call ::pipe
// call qt_safe_pipe
static inline int qt_safe_pipe(int pipefd[2], int flags = 0)
{
#ifdef O_CLOEXEC
Q_ASSERT((flags & ~(O_CLOEXEC | O_NONBLOCK)) == 0);
#else
Q_ASSERT((flags & ~O_NONBLOCK) == 0);
#endif
register int ret;
#if QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC
// use pipe2
flags |= O_CLOEXEC;
ret = ::pipe2(pipefd, flags); // pipe2 is Linux-specific and is documented not to return EINTR
if (ret == 0 || errno != ENOSYS)
return ret;
#endif
ret = ::pipe(pipefd);
if (ret == -1)
return -1;
::fcntl(pipefd[0], F_SETFD, FD_CLOEXEC);
::fcntl(pipefd[1], F_SETFD, FD_CLOEXEC);
// set non-block too?
if (flags & O_NONBLOCK) {
::fcntl(pipefd[0], F_SETFL, ::fcntl(pipefd[0], F_GETFL) | O_NONBLOCK);
::fcntl(pipefd[1], F_SETFL, ::fcntl(pipefd[1], F_GETFL) | O_NONBLOCK);
}
return 0;
}
#endif // Q_OS_VXWORKS
// don't call dup or fcntl(F_DUPFD)
static inline int qt_safe_dup(int oldfd, int atleast = 0, int flags = FD_CLOEXEC)
{
Q_ASSERT(flags == FD_CLOEXEC || flags == 0);
register int ret;
#ifdef F_DUPFD_CLOEXEC
// use this fcntl
if (flags & FD_CLOEXEC) {
ret = ::fcntl(oldfd, F_DUPFD_CLOEXEC, atleast);
if (ret != -1 || errno != EINVAL)
return ret;
}
#endif
// use F_DUPFD
ret = ::fcntl(oldfd, F_DUPFD, atleast);
if (flags && ret != -1)
::fcntl(ret, F_SETFD, flags);
return ret;
}
// don't call dup2
// call qt_safe_dup2
static inline int qt_safe_dup2(int oldfd, int newfd, int flags = FD_CLOEXEC)
{
Q_ASSERT(flags == FD_CLOEXEC || flags == 0);
register int ret;
#if QT_UNIX_SUPPORTS_THREADSAFE_CLOEXEC
// use dup3
if (flags & FD_CLOEXEC) {
EINTR_LOOP(ret, ::dup3(oldfd, newfd, O_CLOEXEC));
if (ret == 0 || errno != ENOSYS)
return ret;
}
#endif
EINTR_LOOP(ret, ::dup2(oldfd, newfd));
if (ret == -1)
return -1;
if (flags)
::fcntl(newfd, F_SETFD, flags);
return 0;
}
static inline qint64 qt_safe_read(int fd, void *data, qint64 maxlen)
{
qint64 ret = 0;
EINTR_LOOP(ret, QT_READ(fd, data, maxlen));
return ret;
}
#undef QT_READ
#define QT_READ qt_safe_read
static inline qint64 qt_safe_write(int fd, const void *data, qint64 len)
{
qint64 ret = 0;
EINTR_LOOP(ret, QT_WRITE(fd, data, len));
return ret;
}
#undef QT_WRITE
#define QT_WRITE qt_safe_write
static inline int qt_safe_close(int fd)
{
register int ret;
EINTR_LOOP(ret, QT_CLOSE(fd));
return ret;
}
#undef QT_CLOSE
#define QT_CLOSE qt_safe_close
// Open C does not (yet?) implement these on Symbian OS and VxWorks doesn't have processes
#if !defined(Q_OS_SYMBIAN) && !defined(Q_OS_VXWORKS)
static inline int qt_safe_execve(const char *filename, char *const argv[],
char *const envp[])
{
register int ret;
EINTR_LOOP(ret, ::execve(filename, argv, envp));
return ret;
}
static inline int qt_safe_execv(const char *path, char *const argv[])
{
register int ret;
EINTR_LOOP(ret, ::execv(path, argv));
return ret;
}
static inline int qt_safe_execvp(const char *file, char *const argv[])
{
register int ret;
EINTR_LOOP(ret, ::execvp(file, argv));
return ret;
}
#endif
#ifndef Q_OS_VXWORKS // no processes on VxWorks
static inline pid_t qt_safe_waitpid(pid_t pid, int *status, int options)
{
register int ret;
EINTR_LOOP(ret, ::waitpid(pid, status, options));
return ret;
}
#endif // Q_OS_VXWORKS
#if !defined(_POSIX_MONOTONIC_CLOCK)
# define _POSIX_MONOTONIC_CLOCK -1
#endif
bool qt_gettime_is_monotonic();
timeval qt_gettime();
Q_CORE_EXPORT int qt_safe_select(int nfds, fd_set *fdread, fd_set *fdwrite, fd_set *fdexcept,
const struct timeval *tv);
QT_END_NAMESPACE
#endif
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