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wxWidgets/src/unix/utilsunx.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: 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
// ----------------------------------------------------------------------------
#include "wx/defs.h"
#include "wx/string.h"
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/app.h"
#include "wx/utils.h"
#include "wx/process.h"
#include "wx/thread.h"
#include "wx/wfstream.h"
#ifdef HAVE_STATFS
# ifdef __BSD__
# include <sys/param.h>
# include <sys/mount.h>
# else
# include <sys/vfs.h>
# endif
#endif // HAVE_STATFS
// not only the statfs syscall is called differently depending on platform, but
// we also can't use "struct statvfs" under Solaris because it breaks down if
// HAVE_LARGEFILE_SUPPORT == 1 and we must use statvfs_t instead
#ifdef HAVE_STATVFS
#include <sys/statvfs.h>
#define statfs statvfs
#define wxStatFs statvfs_t
#elif HAVE_STATFS
#define wxStatFs struct statfs
#endif // HAVE_STAT[V]FS
#if wxUSE_GUI
#include "wx/unix/execute.h"
#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 <unistd.h>
#include <sys/wait.h>
#include <pwd.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
// ----------------------------------------------------------------------------
// 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 __SUN__
int usleep(unsigned int usec);
#else // !Sun
#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 // !Sun && !EMX
void usleep(unsigned long usec);
#endif
#endif // Sun/EMX/Something else
};
#define HAVE_USLEEP 1
#endif // Unices without usleep()
// ============================================================================
// implementation
// ============================================================================
// ----------------------------------------------------------------------------
// sleeping
// ----------------------------------------------------------------------------
void wxSleep(int nSecs)
{
sleep(nSecs);
}
void wxUsleep(unsigned long milliseconds)
{
#if defined(HAVE_NANOSLEEP)
timespec tmReq;
tmReq.tv_sec = (time_t)(milliseconds / 1000);
tmReq.tv_nsec = (milliseconds % 1000) * 1000 * 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(milliseconds * 1000); // usleep(3) wants microseconds
#elif defined(HAVE_SLEEP)
// under BeOS sleep() takes seconds (what about other platforms, if any?)
sleep(milliseconds * 1000);
#else // !sleep function
#error "usleep() or nanosleep() function required for wxUsleep"
#endif // sleep function
}
// ----------------------------------------------------------------------------
// process management
// ----------------------------------------------------------------------------
int wxKill(long pid, wxSignal sig, wxKillError *rc)
{
int err = kill((pid_t)pid, (int)sig);
if ( rc )
{
switch ( errno )
{
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
long wxExecute( const wxString& command, int flags, wxProcess *process )
{
wxCHECK_MSG( !command.IsEmpty(), 0, wxT("can't exec empty command") );
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=wxT("");
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;
// do execute the command
long 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, 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;
}
#if wxUSE_GUI
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_GUI
// ----------------------------------------------------------------------------
// wxStream classes to support IO redirection in wxExecute
// ----------------------------------------------------------------------------
#if wxUSE_STREAMS
// ----------------------------------------------------------------------------
// wxProcessFileInputStream: stream for reading from a pipe
// ----------------------------------------------------------------------------
class wxProcessFileInputStream : public wxFileInputStream
{
public:
wxProcessFileInputStream(int fd) : wxFileInputStream(fd) { }
// return TRUE if we have anything to read, don't block
bool IsAvailable() const;
};
bool wxProcessFileInputStream::IsAvailable() const
{
if ( m_lasterror == wxSTREAM_EOF )
return TRUE;
// 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;
FD_ZERO(&readfds);
FD_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 TRUE;
default:
wxFAIL_MSG(_T("unexpected select() return value"));
// still fall through
case 1:
// input available
return TRUE;
}
}
// ----------------------------------------------------------------------------
// wxStreamTempInputBuffer
// ----------------------------------------------------------------------------
/*
Extract of a mail to wx-users to give the context of the problem we are
trying to solve here:
MC> If I run the command:
MC> find . -name "*.h" -exec grep linux {} \;
MC> in the exec sample synchronously from the 'Capture command output'
MC> menu, wxExecute never returns. I have to xkill it. Has anyone
MC> else encountered this?
Yes, I can reproduce it too.
I even think I understand why it happens: before launching the external
command we set up a pipe with a valid file descriptor on the reading side
when the output is redirected. So the subprocess happily writes to it ...
until the pipe buffer (which is usually quite big on Unix, I think the
default is 4Kb) is full. Then the writing process stops and waits until we
read some data from the pipe to be able to continue writing to it but we
never do it because we wait until it terminates to start reading and so we
have a classical deadlock.
Here is the fix: we now read the output as soon as it appears into a temp
buffer (wxStreamTempInputBuffer object) and later just stuff it back into the
stream when the process terminates. See supporting code in wxExecute()
itself as well.
Note that this is horribly inefficient for large amounts of output (count
the number of times we copy the data around) and so a better API is badly
needed!
*/
class wxStreamTempInputBuffer
{
public:
wxStreamTempInputBuffer();
// call to associate a stream with this buffer, otherwise nothing happens
// at all
void Init(wxProcessFileInputStream *stream);
// check for input on our stream and cache it in our buffer if any
void Update();
~wxStreamTempInputBuffer();
private:
// the stream we're buffering, if NULL we don't do anything at all
wxProcessFileInputStream *m_stream;
// the buffer of size m_size (NULL if m_size == 0)
void *m_buffer;
// the size of the buffer
size_t m_size;
};
wxStreamTempInputBuffer::wxStreamTempInputBuffer()
{
m_stream = NULL;
m_buffer = NULL;
m_size = 0;
}
void wxStreamTempInputBuffer::Init(wxProcessFileInputStream *stream)
{
m_stream = stream;
}
void wxStreamTempInputBuffer::Update()
{
if ( m_stream && m_stream->IsAvailable() )
{
// realloc in blocks of 4Kb: this is the default (and minimal) buffer
// size of the Unix pipes so it should be the optimal step
static const size_t incSize = 4096;
void *buf = realloc(m_buffer, m_size + incSize);
if ( !buf )
{
// don't read any more, we don't have enough memory to do it
m_stream = NULL;
}
else // got memory for the buffer
{
m_buffer = buf;
m_stream->Read((char *)m_buffer + m_size, incSize);
m_size += m_stream->LastRead();
}
}
}
wxStreamTempInputBuffer::~wxStreamTempInputBuffer()
{
if ( m_buffer )
{
m_stream->Ungetch(m_buffer, m_size);
free(m_buffer);
}
}
#endif // wxUSE_STREAMS
// ----------------------------------------------------------------------------
// wxPipe: this encapsulates pipe() system call
// ----------------------------------------------------------------------------
class wxPipe
{
public:
// the symbolic names for the pipe ends
enum Direction
{
Read,
Write
};
enum
{
INVALID_FD = -1
};
// default ctor doesn't do anything
wxPipe() { m_fds[Read] = m_fds[Write] = INVALID_FD; }
// create the pipe, return TRUE if ok, FALSE on error
bool Create()
{
if ( pipe(m_fds) == -1 )
{
wxLogSysError(_("Pipe creation failed"));
return FALSE;
}
return TRUE;
}
// return TRUE if we were created successfully
bool IsOk() const { return m_fds[Read] != INVALID_FD; }
// return the descriptor for one of the pipe ends
int operator[](Direction which) const
{
wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_fds),
_T("invalid pipe index") );
return m_fds[which];
}
// detach a descriptor, meaning that the pipe dtor won't close it, and
// return it
int Detach(Direction which)
{
wxASSERT_MSG( which >= 0 && (size_t)which < WXSIZEOF(m_fds),
_T("invalid pipe index") );
int fd = m_fds[which];
m_fds[which] = INVALID_FD;
return fd;
}
// close the pipe descriptors
void Close()
{
for ( size_t n = 0; n < WXSIZEOF(m_fds); n++ )
{
if ( m_fds[n] != INVALID_FD )
close(m_fds[n]);
}
}
// dtor closes the pipe descriptors
~wxPipe() { Close(); }
private:
int m_fds[2];
};
// ----------------------------------------------------------------------------
// 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 = wxConvertWX2MB(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
#if wxUSE_GUI
// create pipes
wxPipe pipeEndProcDetect;
if ( !pipeEndProcDetect.Create() )
{
wxLogError( _("Failed to execute '%s'\n"), *argv );
ARGS_CLEANUP;
return ERROR_RETURN_CODE;
}
#endif // wxUSE_GUI
// 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
#ifdef HAVE_VFORK
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
{
#if wxUSE_GUI
// reading side can be safely closed but we should keep the write one
// opened
pipeEndProcDetect.Detach(wxPipe::Write);
#endif // wxUSE_GUI
// 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) )
{
for ( int fd = 0; fd < FD_SETSIZE; fd++ )
{
if ( fd == pipeIn[wxPipe::Read]
|| fd == pipeOut[wxPipe::Write]
|| fd == pipeErr[wxPipe::Write]
#if wxUSE_GUI
|| fd == pipeEndProcDetect[wxPipe::Write]
#endif // wxUSE_GUI
)
{
// 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);
}
#ifndef __VMS
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
}
// 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);
// 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;
// prepare for IO redirection
#if wxUSE_STREAMS
// the input buffer bufOut is connected to stdout, this is why it is
// called bufOut and not bufIn
wxStreamTempInputBuffer bufOut,
bufErr;
#endif // wxUSE_STREAMS
if ( process && process->IsRedirected() )
{
#if wxUSE_STREAMS
wxOutputStream *inStream =
new wxFileOutputStream(pipeIn.Detach(wxPipe::Write));
wxProcessFileInputStream *outStream =
new wxProcessFileInputStream(pipeOut.Detach(wxPipe::Read));
wxProcessFileInputStream *errStream =
new wxProcessFileInputStream(pipeErr.Detach(wxPipe::Read));
process->SetPipeStreams(outStream, inStream, errStream);
bufOut.Init(outStream);
bufErr.Init(errStream);
#endif // wxUSE_STREAMS
}
if ( pipeIn.IsOk() )
{
pipeIn.Close();
pipeOut.Close();
pipeErr.Close();
}
#if wxUSE_GUI && !defined(__WXMICROWIN__)
wxEndProcessData *data = new wxEndProcessData;
data->tag = wxAddProcessCallback
(
data,
pipeEndProcDetect.Detach(wxPipe::Read)
);
pipeEndProcDetect.Close();
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
data->process = NULL;
// sync execution: indicate it by negating the pid
data->pid = -pid;
wxBusyCursor bc;
wxWindowDisabler wd;
// data->pid will be set to 0 from GTK_EndProcessDetector when the
// process terminates
while ( data->pid != 0 )
{
#if wxUSE_STREAMS
bufOut.Update();
bufErr.Update();
#endif // wxUSE_STREAMS
// give GTK+ a chance to call GTK_EndProcessDetector here and
// also repaint the GUI
wxYield();
}
int exitcode = data->exitcode;
delete data;
return exitcode;
}
else // async execution
{
// async execution, nothing special to do - caller will be
// notified about the process termination if process != NULL, data
// will be deleted in GTK_EndProcessDetector
data->process = process;
data->pid = pid;
return pid;
}
#else // !wxUSE_GUI
wxASSERT_MSG( flags & wxEXEC_SYNC,
wxT("async execution not supported yet") );
int exitcode = 0;
if ( waitpid(pid, &exitcode, 0) == -1 || !WIFEXITED(exitcode) )
{
wxLogSysError(_("Waiting for subprocess termination failed"));
}
return exitcode;
#endif // wxUSE_GUI
}
}
#undef ERROR_RETURN_CODE
#undef ARGS_CLEANUP
// ----------------------------------------------------------------------------
// file and directory functions
// ----------------------------------------------------------------------------
const wxChar* wxGetHomeDir( wxString *home )
{
*home = wxGetUserHome( wxString() );
wxString tmp;
if ( home->IsEmpty() )
*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)
{
return ptr;
}
if ((ptr = wxGetenv(wxT("USER"))) != NULL || (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
{
who = getpwnam(wxConvertWX2MB(ptr));
}
// We now make sure the the user exists!
if (who == NULL)
{
who = getpwuid(getuid());
}
}
else
{
who = getpwnam (user.mb_str());
}
return wxConvertMB2WX(who ? who->pw_dir : 0);
}
// ----------------------------------------------------------------------------
// network and user id routines
// ----------------------------------------------------------------------------
// 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, wxConvertMB2WX(uts.nodename), sz - 1);
buf[sz] = wxT('\0');
}
#elif defined(HAVE_GETHOSTNAME)
bool ok = gethostname(buf, sz) != -1;
#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(wxConvertWX2MB(buf));
if ( !host )
{
wxLogSysError(_("Cannot get the official hostname"));
ok = FALSE;
}
else
{
// the canonical name
wxStrncpy(buf, wxConvertMB2WX(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, wxConvertMB2WX(who->pw_name), sz - 1);
return TRUE;
}
return FALSE;
}
bool wxGetUserName(wxChar *buf, int sz)
{
struct passwd *who;
*buf = wxT('\0');
if ((who = getpwuid (getuid ())) != NULL)
{
// pw_gecos field in struct passwd is not standard
#ifdef HAVE_PW_GECOS
char *comma = strchr(who->pw_gecos, ',');
if (comma)
*comma = '\0'; // cut off non-name comment fields
wxStrncpy (buf, wxConvertMB2WX(who->pw_gecos), sz - 1);
#else // !HAVE_PW_GECOS
wxStrncpy (buf, wxConvertMB2WX(who->pw_name), sz - 1);
#endif // HAVE_PW_GECOS/!HAVE_PW_GECOS
return TRUE;
}
return FALSE;
}
#ifndef __WXMAC__
wxString wxGetOsDescription()
{
#ifndef WXWIN_OS_DESCRIPTION
#error WXWIN_OS_DESCRIPTION should be defined in config.h by configure
#else
return WXWIN_OS_DESCRIPTION;
#endif
}
#endif
// this function returns the GUI toolkit version in GUI programs, but OS
// version in non-GUI ones
#if !wxUSE_GUI
int wxGetOsVersion(int *majorVsn, int *minorVsn)
{
int major, minor;
char name[256];
if ( sscanf(WXWIN_OS_DESCRIPTION, "%s %d.%d", name, &major, &minor) != 3 )
{
// unreckognized uname string format
major = minor = -1;
}
if ( majorVsn )
*majorVsn = major;
if ( minorVsn )
*minorVsn = minor;
return wxUNIX;
}
#endif // !wxUSE_GUI
unsigned long wxGetProcessId()
{
return (unsigned long)getpid();
}
long 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) )
{
long memTotal, memUsed;
sscanf(buf, "Mem: %ld %ld %ld", &memTotal, &memUsed, &memFree);
}
fclose(fp);
return memFree;
}
#elif defined(__SUN__) && defined(_SC_AVPHYS_PAGES)
return sysconf(_SC_AVPHYS_PAGES)*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, wxLongLong *pTotal, wxLongLong *pFree)
{
#if defined(HAVE_STATFS) || defined(HAVE_STATVFS)
// the case to "char *" is needed for AIX 4.3
wxStatFs fs;
if ( statfs((char *)path.fn_str(), &fs) != 0 )
{
wxLogSysError("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
wxLongLong blockSize = fs.f_frsize;
#else // HAVE_STATFS
wxLongLong blockSize = fs.f_bsize;
#endif // HAVE_STATVFS/HAVE_STATFS
if ( pTotal )
{
*pTotal = wxLongLong(fs.f_blocks) * blockSize;
}
if ( pFree )
{
*pFree = wxLongLong(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)
return setenv(variable.mb_str(),
value ? (const char *)wxString(value).mb_str()
: NULL,
1 /* overwrite */) == 0;
#elif defined(HAVE_PUTENV)
wxString s = variable;
if ( value )
s << _T('=') << value;
// transform to ANSI
const char *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
// ----------------------------------------------------------------------------
// error and debug output routines (deprecated, use wxLog)
// ----------------------------------------------------------------------------
#if WXWIN_COMPATIBILITY_2_2
void wxDebugMsg( const char *format, ... )
{
va_list ap;
va_start( ap, format );
vfprintf( stderr, format, ap );
fflush( stderr );
va_end(ap);
}
void wxError( const wxString &msg, const wxString &title )
{
wxFprintf( stderr, _("Error ") );
if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
wxFprintf( stderr, wxT(".\n") );
}
void wxFatalError( const wxString &msg, const wxString &title )
{
wxFprintf( stderr, _("Error ") );
if (!title.IsNull()) wxFprintf( stderr, wxT("%s "), WXSTRINGCAST(title) );
if (!msg.IsNull()) wxFprintf( stderr, wxT(": %s"), WXSTRINGCAST(msg) );
wxFprintf( stderr, wxT(".\n") );
exit(3); // the same exit code as for abort()
}
#endif // WXWIN_COMPATIBILITY_2_2
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