Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
6e66311d0a5150e758ca5058abe1d0c748d9063f
wxWidgets/src/unix/utilsunx.cpp
Vadim Zeitlin 6e66311d0a use unsetenv() instead of setenv(var, NULL) which is invalid 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@47942 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2007-08-07 22:29:07 +00:00

1329 lines
36 KiB
C++
Raw Blame History

/////////////////////////////////////////////////////////////////////////////
// Name: src/unix/utilsunx.cpp
// Purpose: generic Unix implementation of many wx functions
// Author: Vadim Zeitlin
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling, Vadim Zeitlin
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// declarations
// ============================================================================
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
// for compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#include "wx/utils.h"
#ifndef WX_PRECOMP
#include "wx/string.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/app.h"
#endif
#include "wx/apptrait.h"
#include "wx/process.h"
#include "wx/thread.h"
#include "wx/wfstream.h"
#include "wx/unix/execute.h"
#include "wx/unix/private.h"
#include <pwd.h>
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#define HAS_PIPE_INPUT_STREAM (wxUSE_STREAMS && wxUSE_FILE)
#if HAS_PIPE_INPUT_STREAM
// define this to let wxexec.cpp know that we know what we're doing
#define _WX_USED_BY_WXEXECUTE_
#include "../common/execcmn.cpp"
#endif // HAS_PIPE_INPUT_STREAM
#if wxUSE_BASE
#if defined(__MWERKS__) && defined(__MACH__)
#ifndef WXWIN_OS_DESCRIPTION
#define WXWIN_OS_DESCRIPTION "MacOS X"
#endif
#ifndef HAVE_NANOSLEEP
#define HAVE_NANOSLEEP
#endif
#ifndef HAVE_UNAME
#define HAVE_UNAME
#endif
// our configure test believes we can use sigaction() if the function is
// available but Metrowekrs with MSL run-time does have the function but
// doesn't have sigaction struct so finally we can't use it...
#ifdef __MSL__
#undef wxUSE_ON_FATAL_EXCEPTION
#define wxUSE_ON_FATAL_EXCEPTION 0
#endif
#endif
// not only the statfs syscall is called differently depending on platform, but
// one of its incarnations, statvfs(), takes different arguments under
// different platforms and even different versions of the same system (Solaris
// 7 and 8): if you want to test for this, don't forget that the problems only
// appear if the large files support is enabled
#ifdef HAVE_STATFS
#ifdef __BSD__
#include <sys/param.h>
#include <sys/mount.h>
#else // !__BSD__
#include <sys/vfs.h>
#endif // __BSD__/!__BSD__
#define wxStatfs statfs
#ifndef HAVE_STATFS_DECL
// some systems lack statfs() prototype in the system headers (AIX 4)
extern "C" int statfs(const char *path, struct statfs *buf);
#endif
#endif // HAVE_STATFS
#ifdef HAVE_STATVFS
#include <sys/statvfs.h>
#define wxStatfs statvfs
#endif // HAVE_STATVFS
#if defined(HAVE_STATFS) || defined(HAVE_STATVFS)
// WX_STATFS_T is detected by configure
#define wxStatfs_t WX_STATFS_T
#endif
// SGI signal.h defines signal handler arguments differently depending on
// whether _LANGUAGE_C_PLUS_PLUS is set or not - do set it
#if defined(__SGI__) && !defined(_LANGUAGE_C_PLUS_PLUS)
#define _LANGUAGE_C_PLUS_PLUS 1
#endif // SGI hack
#include <stdarg.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <signal.h>
#include <fcntl.h> // for O_WRONLY and friends
#include <time.h> // nanosleep() and/or usleep()
#include <ctype.h> // isspace()
#include <sys/time.h> // needed for FD_SETSIZE
#ifdef HAVE_UNAME
#include <sys/utsname.h> // for uname()
#endif // HAVE_UNAME
// Used by wxGetFreeMemory().
#ifdef __SGI__
#include <sys/sysmp.h>
#include <sys/sysinfo.h> // for SAGET and MINFO structures
#endif
// ----------------------------------------------------------------------------
// conditional compilation
// ----------------------------------------------------------------------------
// many versions of Unices have this function, but it is not defined in system
// headers - please add your system here if it is the case for your OS.
// SunOS < 5.6 (i.e. Solaris < 2.6) and DG-UX are like this.
#if !defined(HAVE_USLEEP) && \
((defined(__SUN__) && !defined(__SunOs_5_6) && \
!defined(__SunOs_5_7) && !defined(__SUNPRO_CC)) || \
defined(__osf__) || defined(__EMX__))
extern "C"
{
#ifdef __EMX__
/* I copied this from the XFree86 diffs. AV. */
#define INCL_DOSPROCESS
#include <os2.h>
inline void usleep(unsigned long delay)
{
DosSleep(delay ? (delay/1000l) : 1l);
}
#else // Unix
int usleep(unsigned int usec);
#endif // __EMX__/Unix
};
#define HAVE_USLEEP 1
#endif // Unices without usleep()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// sleeping
// ----------------------------------------------------------------------------
void wxSleep(int nSecs)
{
sleep(nSecs);
}
void wxMicroSleep(unsigned long microseconds)
{
#if defined(HAVE_NANOSLEEP)
timespec tmReq;
tmReq.tv_sec = (time_t)(microseconds / 1000000);
tmReq.tv_nsec = (microseconds % 1000000) * 1000;
// we're not interested in remaining time nor in return value
(void)nanosleep(&tmReq, (timespec *)NULL);
#elif defined(HAVE_USLEEP)
// uncomment this if you feel brave or if you are sure that your version
// of Solaris has a safe usleep() function but please notice that usleep()
// is known to lead to crashes in MT programs in Solaris 2.[67] and is not
// documented as MT-Safe
#if defined(__SUN__) && wxUSE_THREADS
#error "usleep() cannot be used in MT programs under Solaris."
#endif // Sun
usleep(microseconds);
#elif defined(HAVE_SLEEP)
// under BeOS sleep() takes seconds (what about other platforms, if any?)
sleep(microseconds * 1000000);
#else // !sleep function
#error "usleep() or nanosleep() function required for wxMicroSleep"
#endif // sleep function
}
void wxMilliSleep(unsigned long milliseconds)
{
wxMicroSleep(milliseconds*1000);
}
// ----------------------------------------------------------------------------
// process management
// ----------------------------------------------------------------------------
int wxKill(long pid, wxSignal sig, wxKillError *rc, int flags)
{
int err = kill((pid_t) (flags & wxKILL_CHILDREN) ? -pid : pid, (int)sig);
if ( rc )
{
switch ( err ? errno : 0 )
{
case 0:
*rc = wxKILL_OK;
break;
case EINVAL:
*rc = wxKILL_BAD_SIGNAL;
break;
case EPERM:
*rc = wxKILL_ACCESS_DENIED;
break;
case ESRCH:
*rc = wxKILL_NO_PROCESS;
break;
default:
// this goes against Unix98 docs so log it
wxLogDebug(_T("unexpected kill(2) return value %d"), err);
// something else...
*rc = wxKILL_ERROR;
}
}
return err;
}
#define WXEXECUTE_NARGS 127
#if defined(__DARWIN__)
long wxMacExecute(wxChar **argv,
int flags,
wxProcess *process);
#endif
long wxExecute( const wxString& command, int flags, wxProcess *process )
{
wxCHECK_MSG( !command.empty(), 0, wxT("can't exec empty command") );
wxLogTrace(wxT("exec"), wxT("Executing \"%s\""), command.c_str());
#if wxUSE_THREADS
// fork() doesn't mix well with POSIX threads: on many systems the program
// deadlocks or crashes for some reason. Probably our code is buggy and
// doesn't do something which must be done to allow this to work, but I
// don't know what yet, so for now just warn the user (this is the least we
// can do) about it
wxASSERT_MSG( wxThread::IsMain(),
_T("wxExecute() can be called only from the main thread") );
#endif // wxUSE_THREADS
int argc = 0;
wxChar *argv[WXEXECUTE_NARGS];
wxString argument;
const wxChar *cptr = command.c_str();
wxChar quotechar = wxT('\0'); // is arg quoted?
bool escaped = false;
// split the command line in arguments
do
{
argument = wxEmptyString;
quotechar = wxT('\0');
// eat leading whitespace:
while ( wxIsspace(*cptr) )
cptr++;
if ( *cptr == wxT('\'') || *cptr == wxT('"') )
quotechar = *cptr++;
do
{
if ( *cptr == wxT('\\') && ! escaped )
{
escaped = true;
cptr++;
continue;
}
// all other characters:
argument += *cptr++;
escaped = false;
// have we reached the end of the argument?
if ( (*cptr == quotechar && ! escaped)
|| (quotechar == wxT('\0') && wxIsspace(*cptr))
|| *cptr == wxT('\0') )
{
wxASSERT_MSG( argc < WXEXECUTE_NARGS,
wxT("too many arguments in wxExecute") );
argv[argc] = new wxChar[argument.length() + 1];
wxStrcpy(argv[argc], argument.c_str());
argc++;
// if not at end of buffer, swallow last character:
if(*cptr)
cptr++;
break; // done with this one, start over
}
} while(*cptr);
} while(*cptr);
argv[argc] = NULL;
long lRc;
#if defined(__DARWIN__)
// wxMacExecute only executes app bundles.
// It returns an error code if the target is not an app bundle, thus falling
// through to the regular wxExecute for non app bundles.
lRc = wxMacExecute(argv, flags, process);
if( lRc != ((flags & wxEXEC_SYNC) ? -1 : 0))
return lRc;
#endif
// do execute the command
lRc = wxExecute(argv, flags, process);
// clean up
argc = 0;
while( argv[argc] )
delete [] argv[argc++];
return lRc;
}
// ----------------------------------------------------------------------------
// wxShell
// ----------------------------------------------------------------------------
static wxString wxMakeShellCommand(const wxString& command)
{
wxString cmd;
if ( !command )
{
// just an interactive shell
cmd = _T("xterm");
}
else
{
// execute command in a shell
cmd << _T("/bin/sh -c '") << command << _T('\'');
}
return cmd;
}
bool wxShell(const wxString& command)
{
return wxExecute(wxMakeShellCommand(command), wxEXEC_SYNC) == 0;
}
bool wxShell(const wxString& command, wxArrayString& output)
{
wxCHECK_MSG( !command.empty(), false, _T("can't exec shell non interactively") );
return wxExecute(wxMakeShellCommand(command), output);
}
// Shutdown or reboot the PC
bool wxShutdown(wxShutdownFlags wFlags)
{
wxChar level;
switch ( wFlags )
{
case wxSHUTDOWN_POWEROFF:
level = _T('0');
break;
case wxSHUTDOWN_REBOOT:
level = _T('6');
break;
default:
wxFAIL_MSG( _T("unknown wxShutdown() flag") );
return false;
}
return system(wxString::Format(_T("init %c"), level).mb_str()) == 0;
}
// ----------------------------------------------------------------------------
// wxStream classes to support IO redirection in wxExecute
// ----------------------------------------------------------------------------
#if HAS_PIPE_INPUT_STREAM
bool wxPipeInputStream::CanRead() const
{
if ( m_lasterror == wxSTREAM_EOF )
return false;
// check if there is any input available
struct timeval tv;
tv.tv_sec = 0;
tv.tv_usec = 0;
const int fd = m_file->fd();
fd_set readfds;
wxFD_ZERO(&readfds);
wxFD_SET(fd, &readfds);
switch ( select(fd + 1, &readfds, NULL, NULL, &tv) )
{
case -1:
wxLogSysError(_("Impossible to get child process input"));
// fall through
case 0:
return false;
default:
wxFAIL_MSG(_T("unexpected select() return value"));
// still fall through
case 1:
// input available -- or maybe not, as select() returns 1 when a
// read() will complete without delay, but it could still not read
// anything
return !Eof();
}
}
#endif // HAS_PIPE_INPUT_STREAM
// ----------------------------------------------------------------------------
// wxExecute: the real worker function
// ----------------------------------------------------------------------------
long wxExecute(wxChar **argv, int flags, wxProcess *process)
{
// for the sync execution, we return -1 to indicate failure, but for async
// case we return 0 which is never a valid PID
//
// we define this as a macro, not a variable, to avoid compiler warnings
// about "ERROR_RETURN_CODE value may be clobbered by fork()"
#define ERROR_RETURN_CODE ((flags & wxEXEC_SYNC) ? -1 : 0)
wxCHECK_MSG( *argv, ERROR_RETURN_CODE, wxT("can't exec empty command") );
#if wxUSE_UNICODE
int mb_argc = 0;
char *mb_argv[WXEXECUTE_NARGS];
while (argv[mb_argc])
{
wxWX2MBbuf mb_arg = wxSafeConvertWX2MB(argv[mb_argc]);
mb_argv[mb_argc] = strdup(mb_arg);
mb_argc++;
}
mb_argv[mb_argc] = (char *) NULL;
// this macro will free memory we used above
#define ARGS_CLEANUP \
for ( mb_argc = 0; mb_argv[mb_argc]; mb_argc++ ) \
free(mb_argv[mb_argc])
#else // ANSI
// no need for cleanup
#define ARGS_CLEANUP
wxChar **mb_argv = argv;
#endif // Unicode/ANSI
// we want this function to work even if there is no wxApp so ensure that
// we have a valid traits pointer
wxConsoleAppTraits traitsConsole;
wxAppTraits *traits = wxTheApp ? wxTheApp->GetTraits() : NULL;
if ( !traits )
traits = &traitsConsole;
// this struct contains all information which we pass to and from
// wxAppTraits methods
wxExecuteData execData;
execData.flags = flags;
execData.process = process;
// create pipes
if ( !traits->CreateEndProcessPipe(execData) )
{
wxLogError( _("Failed to execute '%s'\n"), *argv );
ARGS_CLEANUP;
return ERROR_RETURN_CODE;
}
// pipes for inter process communication
wxPipe pipeIn, // stdin
pipeOut, // stdout
pipeErr; // stderr
if ( process && process->IsRedirected() )
{
if ( !pipeIn.Create() || !pipeOut.Create() || !pipeErr.Create() )
{
wxLogError( _("Failed to execute '%s'\n"), *argv );
ARGS_CLEANUP;
return ERROR_RETURN_CODE;
}
}
// fork the process
//
// NB: do *not* use vfork() here, it completely breaks this code for some
// reason under Solaris (and maybe others, although not under Linux)
// But on OpenVMS we do not have fork so we have to use vfork and
// cross our fingers that it works.
#ifdef __VMS
pid_t pid = vfork();
#else
pid_t pid = fork();
#endif
if ( pid == -1 ) // error?
{
wxLogSysError( _("Fork failed") );
ARGS_CLEANUP;
return ERROR_RETURN_CODE;
}
else if ( pid == 0 ) // we're in child
{
// These lines close the open file descriptors to to avoid any
// input/output which might block the process or irritate the user. If
// one wants proper IO for the subprocess, the right thing to do is to
// start an xterm executing it.
if ( !(flags & wxEXEC_SYNC) )
{
// FD_SETSIZE is unsigned under BSD, signed under other platforms
// so we need a cast to avoid warnings on all platforms
for ( int fd = 0; fd < (int)FD_SETSIZE; fd++ )
{
if ( fd == pipeIn[wxPipe::Read]
|| fd == pipeOut[wxPipe::Write]
|| fd == pipeErr[wxPipe::Write]
|| traits->IsWriteFDOfEndProcessPipe(execData, fd) )
{
// don't close this one, we still need it
continue;
}
// leave stderr opened too, it won't do any harm
if ( fd != STDERR_FILENO )
close(fd);
}
}
#if !defined(__VMS) && !defined(__EMX__)
if ( flags & wxEXEC_MAKE_GROUP_LEADER )
{
// Set process group to child process' pid. Then killing -pid
// of the parent will kill the process and all of its children.
setsid();
}
#endif // !__VMS
// reading side can be safely closed but we should keep the write one
// opened
traits->DetachWriteFDOfEndProcessPipe(execData);
// redirect stdin, stdout and stderr
if ( pipeIn.IsOk() )
{
if ( dup2(pipeIn[wxPipe::Read], STDIN_FILENO) == -1 ||
dup2(pipeOut[wxPipe::Write], STDOUT_FILENO) == -1 ||
dup2(pipeErr[wxPipe::Write], STDERR_FILENO) == -1 )
{
wxLogSysError(_("Failed to redirect child process input/output"));
}
pipeIn.Close();
pipeOut.Close();
pipeErr.Close();
}
execvp (*mb_argv, mb_argv);
fprintf(stderr, "execvp(");
// CS changed ppc to ppc_ as ppc is not available under mac os CW Mach-O
for ( char **ppc_ = mb_argv; *ppc_; ppc_++ )
fprintf(stderr, "%s%s", ppc_ == mb_argv ? "" : ", ", *ppc_);
fprintf(stderr, ") failed with error %d!\n", errno);
// there is no return after successful exec()
_exit(-1);
// some compilers complain about missing return - of course, they
// should know that exit() doesn't return but what else can we do if
// they don't?
//
// and, sure enough, other compilers complain about unreachable code
// after exit() call, so we can just always have return here...
#if defined(__VMS) || defined(__INTEL_COMPILER)
return 0;
#endif
}
else // we're in parent
{
ARGS_CLEANUP;
// save it for WaitForChild() use
execData.pid = pid;
// prepare for IO redirection
#if HAS_PIPE_INPUT_STREAM
// the input buffer bufOut is connected to stdout, this is why it is
// called bufOut and not bufIn
wxStreamTempInputBuffer bufOut,
bufErr;
#endif // HAS_PIPE_INPUT_STREAM
if ( process && process->IsRedirected() )
{
#if HAS_PIPE_INPUT_STREAM
wxOutputStream *inStream =
new wxFileOutputStream(pipeIn.Detach(wxPipe::Write));
wxPipeInputStream *outStream =
new wxPipeInputStream(pipeOut.Detach(wxPipe::Read));
wxPipeInputStream *errStream =
new wxPipeInputStream(pipeErr.Detach(wxPipe::Read));
process->SetPipeStreams(outStream, inStream, errStream);
bufOut.Init(outStream);
bufErr.Init(errStream);
execData.bufOut = &bufOut;
execData.bufErr = &bufErr;
#endif // HAS_PIPE_INPUT_STREAM
}
if ( pipeIn.IsOk() )
{
pipeIn.Close();
pipeOut.Close();
pipeErr.Close();
}
return traits->WaitForChild(execData);
}
#if !defined(__VMS) && !defined(__INTEL_COMPILER)
return ERROR_RETURN_CODE;
#endif
}
#undef ERROR_RETURN_CODE
#undef ARGS_CLEANUP
// ----------------------------------------------------------------------------
// file and directory functions
// ----------------------------------------------------------------------------
const wxChar* wxGetHomeDir( wxString *home )
{
*home = wxGetUserHome( wxEmptyString );
wxString tmp;
if ( home->empty() )
*home = wxT("/");
#ifdef __VMS
tmp = *home;
if ( tmp.Last() != wxT(']'))
if ( tmp.Last() != wxT('/')) *home << wxT('/');
#endif
return home->c_str();
}
#if wxUSE_UNICODE
const wxMB2WXbuf wxGetUserHome( const wxString &user )
#else // just for binary compatibility -- there is no 'const' here
char *wxGetUserHome( const wxString &user )
#endif
{
struct passwd *who = (struct passwd *) NULL;
if ( !user )
{
wxChar *ptr;
if ((ptr = wxGetenv(wxT("HOME"))) != NULL)
{
#if wxUSE_UNICODE
wxWCharBuffer buffer( ptr );
return buffer;
#else
return ptr;
#endif
}
if ((ptr = wxGetenv(wxT("USER"))) != NULL || (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
{
who = getpwnam(wxSafeConvertWX2MB(ptr));
}
// We now make sure the the user exists!
if (who == NULL)
{
who = getpwuid(getuid());
}
}
else
{
who = getpwnam (user.mb_str());
}
return wxSafeConvertMB2WX(who ? who->pw_dir : 0);
}
// ----------------------------------------------------------------------------
// network and user id routines
// ----------------------------------------------------------------------------
// private utility function which returns output of the given command, removing
// the trailing newline
static wxString wxGetCommandOutput(const wxString &cmd)
{
FILE *f = popen(cmd.ToAscii(), "r");
if ( !f )
{
wxLogSysError(_T("Executing \"%s\" failed"), cmd.c_str());
return wxEmptyString;
}
wxString s;
char buf[256];
while ( !feof(f) )
{
if ( !fgets(buf, sizeof(buf), f) )
break;
s += wxString::FromAscii(buf);
}
pclose(f);
if ( !s.empty() && s.Last() == _T('\n') )
s.RemoveLast();
return s;
}
// retrieve either the hostname or FQDN depending on platform (caller must
// check whether it's one or the other, this is why this function is for
// private use only)
static bool wxGetHostNameInternal(wxChar *buf, int sz)
{
wxCHECK_MSG( buf, false, wxT("NULL pointer in wxGetHostNameInternal") );
*buf = wxT('\0');
// we're using uname() which is POSIX instead of less standard sysinfo()
#if defined(HAVE_UNAME)
struct utsname uts;
bool ok = uname(&uts) != -1;
if ( ok )
{
wxStrncpy(buf, wxSafeConvertMB2WX(uts.nodename), sz - 1);
buf[sz] = wxT('\0');
}
#elif defined(HAVE_GETHOSTNAME)
char cbuf[sz];
bool ok = gethostname(cbuf, sz) != -1;
if ( ok )
{
wxStrncpy(buf, wxSafeConvertMB2WX(cbuf), sz - 1);
buf[sz] = wxT('\0');
}
#else // no uname, no gethostname
wxFAIL_MSG(wxT("don't know host name for this machine"));
bool ok = false;
#endif // uname/gethostname
if ( !ok )
{
wxLogSysError(_("Cannot get the hostname"));
}
return ok;
}
bool wxGetHostName(wxChar *buf, int sz)
{
bool ok = wxGetHostNameInternal(buf, sz);
if ( ok )
{
// BSD systems return the FQDN, we only want the hostname, so extract
// it (we consider that dots are domain separators)
wxChar *dot = wxStrchr(buf, wxT('.'));
if ( dot )
{
// nuke it
*dot = wxT('\0');
}
}
return ok;
}
bool wxGetFullHostName(wxChar *buf, int sz)
{
bool ok = wxGetHostNameInternal(buf, sz);
if ( ok )
{
if ( !wxStrchr(buf, wxT('.')) )
{
struct hostent *host = gethostbyname(wxSafeConvertWX2MB(buf));
if ( !host )
{
wxLogSysError(_("Cannot get the official hostname"));
ok = false;
}
else
{
// the canonical name
wxStrncpy(buf, wxSafeConvertMB2WX(host->h_name), sz);
}
}
//else: it's already a FQDN (BSD behaves this way)
}
return ok;
}
bool wxGetUserId(wxChar *buf, int sz)
{
struct passwd *who;
*buf = wxT('\0');
if ((who = getpwuid(getuid ())) != NULL)
{
wxStrncpy (buf, wxSafeConvertMB2WX(who->pw_name), sz - 1);
return true;
}
return false;
}
bool wxGetUserName(wxChar *buf, int sz)
{
#ifdef HAVE_PW_GECOS
struct passwd *who;
*buf = wxT('\0');
if ((who = getpwuid (getuid ())) != NULL)
{
char *comma = strchr(who->pw_gecos, ',');
if (comma)
*comma = '\0'; // cut off non-name comment fields
wxStrncpy (buf, wxSafeConvertMB2WX(who->pw_gecos), sz - 1);
return true;
}
return false;
#else // !HAVE_PW_GECOS
return wxGetUserId(buf, sz);
#endif // HAVE_PW_GECOS/!HAVE_PW_GECOS
}
bool wxIsPlatform64Bit()
{
const wxString machine = wxGetCommandOutput(wxT("uname -m"));
// the test for "64" is obviously not 100% reliable but seems to work fine
// in practice
return machine.Contains(wxT("64")) ||
machine.Contains(wxT("alpha"));
}
// these functions are in mac/utils.cpp for wxMac
#ifndef __WXMAC__
wxOperatingSystemId wxGetOsVersion(int *verMaj, int *verMin)
{
// get OS version
int major, minor;
wxString release = wxGetCommandOutput(wxT("uname -r"));
if ( !release.empty() && wxSscanf(release, wxT("%d.%d"), &major, &minor) != 2 )
{
// unrecognized uname string format
major =
minor = -1;
}
if ( verMaj )
*verMaj = major;
if ( verMin )
*verMin = minor;
// try to understand which OS are we running
wxString kernel = wxGetCommandOutput(wxT("uname -s"));
if ( kernel.empty() )
kernel = wxGetCommandOutput(wxT("uname -o"));
if ( kernel.empty() )
return wxOS_UNKNOWN;
return wxPlatformInfo::GetOperatingSystemId(kernel);
}
wxString wxGetOsDescription()
{
return wxGetCommandOutput(wxT("uname -s -r -m"));
}
#endif // !__WXMAC__
unsigned long wxGetProcessId()
{
return (unsigned long)getpid();
}
wxMemorySize wxGetFreeMemory()
{
#if defined(__LINUX__)
// get it from /proc/meminfo
FILE *fp = fopen("/proc/meminfo", "r");
if ( fp )
{
long memFree = -1;
char buf[1024];
if ( fgets(buf, WXSIZEOF(buf), fp) && fgets(buf, WXSIZEOF(buf), fp) )
{
// /proc/meminfo changed its format in kernel 2.6
if ( wxPlatformInfo().CheckOSVersion(2, 6) )
{
unsigned long cached, buffers;
sscanf(buf, "MemFree: %ld", &memFree);
fgets(buf, WXSIZEOF(buf), fp);
sscanf(buf, "Buffers: %lu", &buffers);
fgets(buf, WXSIZEOF(buf), fp);
sscanf(buf, "Cached: %lu", &cached);
// add to "MemFree" also the "Buffers" and "Cached" values as
// free(1) does as otherwise the value never makes sense: for
// kernel 2.6 it's always almost 0
memFree += buffers + cached;
// values here are always expressed in kB and we want bytes
memFree *= 1024;
}
else // Linux 2.4 (or < 2.6, anyhow)
{
long memTotal, memUsed;
sscanf(buf, "Mem: %ld %ld %ld", &memTotal, &memUsed, &memFree);
}
}
fclose(fp);
return (wxMemorySize)memFree;
}
#elif defined(__SUN__) && defined(_SC_AVPHYS_PAGES)
return (wxMemorySize)(sysconf(_SC_AVPHYS_PAGES)*sysconf(_SC_PAGESIZE));
#elif defined(__SGI__)
struct rminfo realmem;
if ( sysmp(MP_SAGET, MPSA_RMINFO, &realmem, sizeof realmem) == 0 )
return ((wxMemorySize)realmem.physmem * sysconf(_SC_PAGESIZE));
//#elif defined(__FREEBSD__) -- might use sysctl() to find it out, probably
#endif
// can't find it out
return -1;
}
bool wxGetDiskSpace(const wxString& path, wxDiskspaceSize_t *pTotal, wxDiskspaceSize_t *pFree)
{
#if defined(HAVE_STATFS) || defined(HAVE_STATVFS)
// the case to "char *" is needed for AIX 4.3
wxStatfs_t fs;
if ( wxStatfs((char *)(const char*)path.fn_str(), &fs) != 0 )
{
wxLogSysError( wxT("Failed to get file system statistics") );
return false;
}
// under Solaris we also have to use f_frsize field instead of f_bsize
// which is in general a multiple of f_frsize
#ifdef HAVE_STATVFS
wxDiskspaceSize_t blockSize = fs.f_frsize;
#else // HAVE_STATFS
wxDiskspaceSize_t blockSize = fs.f_bsize;
#endif // HAVE_STATVFS/HAVE_STATFS
if ( pTotal )
{
*pTotal = wxDiskspaceSize_t(fs.f_blocks) * blockSize;
}
if ( pFree )
{
*pFree = wxDiskspaceSize_t(fs.f_bavail) * blockSize;
}
return true;
#else // !HAVE_STATFS && !HAVE_STATVFS
return false;
#endif // HAVE_STATFS
}
// ----------------------------------------------------------------------------
// env vars
// ----------------------------------------------------------------------------
bool wxGetEnv(const wxString& var, wxString *value)
{
// wxGetenv is defined as getenv()
wxChar *p = wxGetenv(var);
if ( !p )
return false;
if ( value )
{
*value = p;
}
return true;
}
bool wxSetEnv(const wxString& variable, const wxChar *value)
{
#if defined(HAVE_SETENV)
if ( !value )
{
#ifdef HAVE_UNSETENV
return unsetenv(variable.mb_str()) == 0;
#else
value = _T(""); // we can't pass NULL to setenv()
#endif
}
return setenv(variable.mb_str(),
wxString(value).mb_str(),
1 /* overwrite */) == 0;
#elif defined(HAVE_PUTENV)
wxString s = variable;
if ( value )
s << _T('=') << value;
// transform to ANSI
const wxWX2MBbuf p = s.mb_str();
// the string will be free()d by libc
char *buf = (char *)malloc(strlen(p) + 1);
strcpy(buf, p);
return putenv(buf) == 0;
#else // no way to set an env var
return false;
#endif
}
// ----------------------------------------------------------------------------
// signal handling
// ----------------------------------------------------------------------------
#if wxUSE_ON_FATAL_EXCEPTION
#include <signal.h>
extern "C" void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
{
if ( wxTheApp )
{
// give the user a chance to do something special about this
wxTheApp->OnFatalException();
}
abort();
}
bool wxHandleFatalExceptions(bool doit)
{
// old sig handlers
static bool s_savedHandlers = false;
static struct sigaction s_handlerFPE,
s_handlerILL,
s_handlerBUS,
s_handlerSEGV;
bool ok = true;
if ( doit && !s_savedHandlers )
{
// install the signal handler
struct sigaction act;
// some systems extend it with non std fields, so zero everything
memset(&act, 0, sizeof(act));
act.sa_handler = wxFatalSignalHandler;
sigemptyset(&act.sa_mask);
act.sa_flags = 0;
ok &= sigaction(SIGFPE, &act, &s_handlerFPE) == 0;
ok &= sigaction(SIGILL, &act, &s_handlerILL) == 0;
ok &= sigaction(SIGBUS, &act, &s_handlerBUS) == 0;
ok &= sigaction(SIGSEGV, &act, &s_handlerSEGV) == 0;
if ( !ok )
{
wxLogDebug(_T("Failed to install our signal handler."));
}
s_savedHandlers = true;
}
else if ( s_savedHandlers )
{
// uninstall the signal handler
ok &= sigaction(SIGFPE, &s_handlerFPE, NULL) == 0;
ok &= sigaction(SIGILL, &s_handlerILL, NULL) == 0;
ok &= sigaction(SIGBUS, &s_handlerBUS, NULL) == 0;
ok &= sigaction(SIGSEGV, &s_handlerSEGV, NULL) == 0;
if ( !ok )
{
wxLogDebug(_T("Failed to uninstall our signal handler."));
}
s_savedHandlers = false;
}
//else: nothing to do
return ok;
}
#endif // wxUSE_ON_FATAL_EXCEPTION
#endif // wxUSE_BASE
#if wxUSE_GUI
// ----------------------------------------------------------------------------
// wxExecute support
// ----------------------------------------------------------------------------
// Darwin doesn't use the same process end detection mechanisms so we don't
// need wxExecute-related helpers for it
#if !(defined(__DARWIN__) && defined(__WXMAC__))
bool wxGUIAppTraits::CreateEndProcessPipe(wxExecuteData& execData)
{
return execData.pipeEndProcDetect.Create();
}
bool wxGUIAppTraits::IsWriteFDOfEndProcessPipe(wxExecuteData& execData, int fd)
{
return fd == (execData.pipeEndProcDetect)[wxPipe::Write];
}
void wxGUIAppTraits::DetachWriteFDOfEndProcessPipe(wxExecuteData& execData)
{
execData.pipeEndProcDetect.Detach(wxPipe::Write);
execData.pipeEndProcDetect.Close();
}
#else // !Darwin
bool wxGUIAppTraits::CreateEndProcessPipe(wxExecuteData& WXUNUSED(execData))
{
return true;
}
bool
wxGUIAppTraits::IsWriteFDOfEndProcessPipe(wxExecuteData& WXUNUSED(execData),
int WXUNUSED(fd))
{
return false;
}
void
wxGUIAppTraits::DetachWriteFDOfEndProcessPipe(wxExecuteData& WXUNUSED(execData))
{
// nothing to do here, we don't use the pipe
}
#endif // !Darwin/Darwin
int wxGUIAppTraits::WaitForChild(wxExecuteData& execData)
{
wxEndProcessData *endProcData = new wxEndProcessData;
const int flags = execData.flags;
// wxAddProcessCallback is now (with DARWIN) allowed to call the
// callback function directly if the process terminates before
// the callback can be added to the run loop. Set up the endProcData.
if ( flags & wxEXEC_SYNC )
{
// we may have process for capturing the program output, but it's
// not used in wxEndProcessData in the case of sync execution
endProcData->process = NULL;
// sync execution: indicate it by negating the pid
endProcData->pid = -execData.pid;
}
else
{
// async execution, nothing special to do -- caller will be
// notified about the process termination if process != NULL, endProcData
// will be deleted in GTK_EndProcessDetector
endProcData->process = execData.process;
endProcData->pid = execData.pid;
}
#if defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__))
endProcData->tag = wxAddProcessCallbackForPid(endProcData, execData.pid);
#else
endProcData->tag = wxAddProcessCallback
(
endProcData,
execData.pipeEndProcDetect.Detach(wxPipe::Read)
);
execData.pipeEndProcDetect.Close();
#endif // defined(__DARWIN__) && (defined(__WXMAC__) || defined(__WXCOCOA__))
if ( flags & wxEXEC_SYNC )
{
wxBusyCursor bc;
wxWindowDisabler *wd = flags & wxEXEC_NODISABLE ? NULL
: new wxWindowDisabler;
// endProcData->pid will be set to 0 from GTK_EndProcessDetector when the
// process terminates
while ( endProcData->pid != 0 )
{
bool idle = true;
#if HAS_PIPE_INPUT_STREAM
if ( execData.bufOut )
{
execData.bufOut->Update();
idle = false;
}
if ( execData.bufErr )
{
execData.bufErr->Update();
idle = false;
}
#endif // HAS_PIPE_INPUT_STREAM
// don't consume 100% of the CPU while we're sitting in this
// loop
if ( idle )
wxMilliSleep(1);
// give GTK+ a chance to call GTK_EndProcessDetector here and
// also repaint the GUI
wxYield();
}
int exitcode = endProcData->exitcode;
delete wd;
delete endProcData;
return exitcode;
}
else // async execution
{
return execData.pid;
}
}
#endif // wxUSE_GUI
#if wxUSE_BASE
void wxHandleProcessTermination(wxEndProcessData *proc_data)
{
// notify user about termination if required
if ( proc_data->process )
{
proc_data->process->OnTerminate(proc_data->pid, proc_data->exitcode);
}
// clean up
if ( proc_data->pid > 0 )
{
delete proc_data;
}
else
{
// let wxExecute() know that the process has terminated
proc_data->pid = 0;
}
}
#endif // wxUSE_BASE
Reference in New Issue View Git Blame Copy Permalink