/////////////////////////////////////////////////////////////////////////////
-// Name: utilsunx.cpp
+// Name: src/unix/utilsunx.cpp
// Purpose: generic Unix implementation of many wx functions
// Author: Vadim Zeitlin
// Id: $Id$
// headers
// ----------------------------------------------------------------------------
-#include "wx/defs.h"
-#include "wx/string.h"
-
-#include "wx/intl.h"
-#include "wx/log.h"
-#include "wx/app.h"
+// for compilers that support precompilation, includes "wx.h".
+#include "wx/wxprec.h"
#include "wx/utils.h"
+
+#define USE_PUTENV (!defined(HAVE_SETENV) && defined(HAVE_PUTENV))
+
+#ifndef WX_PRECOMP
+ #include "wx/string.h"
+ #include "wx/intl.h"
+ #include "wx/log.h"
+ #include "wx/app.h"
+ #include "wx/wxcrtvararg.h"
+ #if USE_PUTENV
+ #include "wx/module.h"
+ #include "wx/hashmap.h"
+ #endif
+#endif
+
+#include "wx/apptrait.h"
+
#include "wx/process.h"
#include "wx/thread.h"
-#include "wx/stream.h"
+#include "wx/cmdline.h"
+
+#include "wx/wfstream.h"
+
+#include "wx/private/selectdispatcher.h"
+#include "wx/private/fdiodispatcher.h"
+#include "wx/unix/execute.h"
+#include "wx/unix/private.h"
+
+#ifdef wxHAS_GENERIC_PROCESS_CALLBACK
+#include "wx/private/fdiodispatcher.h"
+#endif
+
+#include <pwd.h>
+#include <sys/wait.h> // waitpid()
+
+#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 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 __DARWIN__
-# include <sys/param.h>
-# include <sys/mount.h>
-# else
-# include <sys/vfs.h>
-# endif
+ #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
-#if wxUSE_GUI
- #include "wx/unix/execute.h"
+#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
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
-#include <unistd.h>
#include <sys/wait.h>
-#include <pwd.h>
+#include <unistd.h>
#include <errno.h>
#include <netdb.h>
#include <signal.h>
#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
// ----------------------------------------------------------------------------
// 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(__SUN__) && !defined(__SunOs_5_6) && \
!defined(__SunOs_5_7) && !defined(__SUNPRO_CC)) || \
- defined(__osf__) || defined(__EMX__)
+ defined(__osf__) || defined(__EMX__))
extern "C"
{
- #ifdef __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 // Unix
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
+ #endif // __EMX__/Unix
};
#define HAVE_USLEEP 1
sleep(nSecs);
}
-void wxUsleep(unsigned long milliseconds)
+void wxMicroSleep(unsigned long microseconds)
{
#if defined(HAVE_NANOSLEEP)
timespec tmReq;
- tmReq.tv_sec = (time_t)(milliseconds / 1000);
- tmReq.tv_nsec = (milliseconds % 1000) * 1000 * 1000;
+ 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);
#error "usleep() cannot be used in MT programs under Solaris."
#endif // Sun
- usleep(milliseconds * 1000); // usleep(3) wants microseconds
+ usleep(microseconds);
#elif defined(HAVE_SLEEP)
// under BeOS sleep() takes seconds (what about other platforms, if any?)
- sleep(milliseconds * 1000);
+ sleep(microseconds * 1000000);
#else // !sleep function
- #error "usleep() or nanosleep() function required for wxUsleep"
+ #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 wxKill(long pid, wxSignal sig, wxKillError *rc, int flags)
{
- int err = kill((pid_t)pid, (int)sig);
+ int err = kill((pid_t) (flags & wxKILL_CHILDREN) ? -pid : pid, (int)sig);
if ( rc )
{
- switch ( err )
+ switch ( err ? errno : 0 )
{
case 0:
*rc = wxKILL_OK;
return err;
}
-#define WXEXECUTE_NARGS 127
-
-long wxExecute( const wxString& command, bool sync, wxProcess *process )
+// Shutdown or reboot the PC
+bool wxShutdown(int flags)
{
- wxCHECK_MSG( !command.IsEmpty(), 0, wxT("can't exec empty command") );
+ flags &= ~wxSHUTDOWN_FORCE;
- 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
+ wxChar level;
+ switch ( flags )
{
- argument=wxT("");
- quotechar = wxT('\0');
+ case wxSHUTDOWN_POWEROFF:
+ level = _T('0');
+ break;
- // eat leading whitespace:
- while ( wxIsspace(*cptr) )
- cptr++;
+ case wxSHUTDOWN_REBOOT:
+ level = _T('6');
+ break;
- if ( *cptr == wxT('\'') || *cptr == wxT('"') )
- quotechar = *cptr++;
+ case wxSHUTDOWN_LOGOFF:
+ // TODO: use dcop to log off?
+ return false;
- do
- {
- if ( *cptr == wxT('\\') && ! escaped )
- {
- escaped = TRUE;
- cptr++;
- continue;
- }
+ default:
+ wxFAIL_MSG( _T("unknown wxShutdown() flag") );
+ return false;
+ }
- // all other characters:
- argument += *cptr++;
- escaped = FALSE;
+ return system(wxString::Format("init %c", level).mb_str()) == 0;
+}
- // 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") );
+// ----------------------------------------------------------------------------
+// wxStream classes to support IO redirection in wxExecute
+// ----------------------------------------------------------------------------
- argv[argc] = new wxChar[argument.length() + 1];
- wxStrcpy(argv[argc], argument.c_str());
- argc++;
+#if HAS_PIPE_INPUT_STREAM
- // if not at end of buffer, swallow last character:
- if(*cptr)
- cptr++;
+bool wxPipeInputStream::CanRead() const
+{
+ if ( m_lasterror == wxSTREAM_EOF )
+ return false;
- break; // done with this one, start over
- }
- } while(*cptr);
- } while(*cptr);
- argv[argc] = NULL;
+ // check if there is any input available
+ struct timeval tv;
+ tv.tv_sec = 0;
+ tv.tv_usec = 0;
- // do execute the command
- long lRc = wxExecute(argv, sync, process);
+ const int fd = m_file->fd();
- // clean up
- argc = 0;
- while( argv[argc] )
- delete [] argv[argc++];
+ 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
- return lRc;
+ 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
+
// ----------------------------------------------------------------------------
// wxShell
// ----------------------------------------------------------------------------
bool wxShell(const wxString& command)
{
- return wxExecute(wxMakeShellCommand(command), TRUE /* sync */) == 0;
+ 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") );
+ wxCHECK_MSG( !command.empty(), false, _T("can't exec shell non interactively") );
return wxExecute(wxMakeShellCommand(command), output);
}
-#if wxUSE_GUI
-
-void wxHandleProcessTermination(wxEndProcessData *proc_data)
-{
- int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid);
-
- // waitpid is POSIX so should be available everywhere, however on older
- // systems wait() might be used instead in a loop (until the right pid
- // terminates)
- int status = 0;
- int rc;
-
- // wait for child termination and if waitpid() was interrupted, try again
- do
- {
- rc = waitpid(pid, &status, 0);
- }
- while ( rc == -1 && errno == EINTR );
-
- // notify user about termination if required
- if ( proc_data->process )
- {
- proc_data->process->OnTerminate
- (
- proc_data->pid,
- (rc == 0) && WIFEXITED(status)
- ? WEXITSTATUS(status)
- : -1
- );
- }
- // clean up
- if ( proc_data->pid > 0 )
- {
- delete proc_data;
- }
- else
- {
- // wxExecute() will know about it
- proc_data->exitcode = status;
-
- proc_data->pid = 0;
- }
-}
-
-#endif // wxUSE_GUI
-
-// ----------------------------------------------------------------------------
-// wxStream classes to support IO redirection in wxExecute
-// ----------------------------------------------------------------------------
-
-#if wxUSE_STREAMS
-
-class wxProcessFileInputStream : public wxInputStream
+namespace
{
-public:
- wxProcessFileInputStream(int fd) { m_fd = fd; }
- ~wxProcessFileInputStream() { close(m_fd); }
-
- virtual bool Eof() const;
-protected:
- size_t OnSysRead(void *buffer, size_t bufsize);
-
-protected:
- int m_fd;
-};
-
-class wxProcessFileOutputStream : public wxOutputStream
+// helper class for storing arguments as char** array suitable for passing to
+// execvp(), whatever form they were passed to us
+class ArgsArray
{
public:
- wxProcessFileOutputStream(int fd) { m_fd = fd; }
- ~wxProcessFileOutputStream() { close(m_fd); }
-
-protected:
- size_t OnSysWrite(const void *buffer, size_t bufsize);
-
-protected:
- int m_fd;
-};
-
-bool wxProcessFileInputStream::Eof() const
-{
- if ( m_lasterror == wxSTREAM_EOF )
- return TRUE;
+ ArgsArray(const wxArrayString& args)
+ {
+ Init(args.size());
- // check if there is any input available
- struct timeval tv;
- tv.tv_sec = 0;
- tv.tv_usec = 0;
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ m_argv[i] = wxStrdup(args[i]);
+ }
+ }
- fd_set readfds;
- FD_ZERO(&readfds);
- FD_SET(m_fd, &readfds);
- switch ( select(m_fd + 1, &readfds, NULL, NULL, &tv) )
+#if wxUSE_UNICODE
+ ArgsArray(wchar_t **wargv)
{
- case -1:
- wxLogSysError(_("Impossible to get child process input"));
- // fall through
-
- case 0:
- return TRUE;
+ int argc = 0;
+ while ( *wargv++ )
+ argc++;
- default:
- wxFAIL_MSG(_T("unexpected select() return value"));
- // still fall through
+ Init(argc);
- case 1:
- // input available: check if there is any
- return wxInputStream::Eof();
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ m_argv[i] = wxSafeConvertWX2MB(wargv[i]).release();
+ }
}
-}
+#endif // wxUSE_UNICODE
-size_t wxProcessFileInputStream::OnSysRead(void *buffer, size_t bufsize)
-{
- int ret = read(m_fd, buffer, bufsize);
- if ( ret == 0 )
+ ~ArgsArray()
{
- m_lasterror = wxSTREAM_EOF;
- }
- else if ( ret == -1 )
- {
- m_lasterror = wxSTREAM_READ_ERROR;
- ret = 0;
- }
- else
- {
- m_lasterror = wxSTREAM_NOERROR;
+ for ( int i = 0; i < m_argc; i++ )
+ {
+ free(m_argv[i]);
+ }
+
+ delete [] m_argv;
}
- return ret;
-}
+ operator char**() const { return m_argv; }
-size_t wxProcessFileOutputStream::OnSysWrite(const void *buffer, size_t bufsize)
-{
- int ret = write(m_fd, buffer, bufsize);
- if ( ret == -1 )
- {
- m_lasterror = wxSTREAM_WRITE_ERROR;
- ret = 0;
- }
- else
+private:
+ void Init(int argc)
{
- m_lasterror = wxSTREAM_NOERROR;
+ m_argc = argc;
+ m_argv = new char *[m_argc + 1];
+ m_argv[m_argc] = NULL;
}
- return ret;
-}
-
-// ----------------------------------------------------------------------------
-// wxStreamTempBuffer
-// ----------------------------------------------------------------------------
-
-/*
- 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 4Mb) 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 (wxStreamTempBuffer object) and later just stuff it back into the
- stream when the process terminates. See supporting code in wxExecute()
- itself as well.
-*/
-
-class wxStreamTempBuffer
-{
-public:
- wxStreamTempBuffer();
-
- // call to associate a stream with this buffer, otherwise nothing happens
- // at all
- void Init(wxInputStream *stream);
-
- // check for input on our stream and cache it in our buffer if any
- void Update();
+ int m_argc;
+ char **m_argv;
- ~wxStreamTempBuffer();
+ DECLARE_NO_COPY_CLASS(ArgsArray)
+};
-private:
- // the stream we're buffering, if NULL we don't do anything at all
- wxInputStream *m_stream;
+} // anonymous namespace
- // the buffer of size m_size (NULL if m_size == 0)
- void *m_buffer;
+// ----------------------------------------------------------------------------
+// wxExecute implementations
+// ----------------------------------------------------------------------------
- // the size of the buffer
- size_t m_size;
-};
+#if defined(__DARWIN__)
+bool wxMacLaunch(char **argv);
+#endif
-wxStreamTempBuffer::wxStreamTempBuffer()
+long wxExecute(const wxString& command, int flags, wxProcess *process)
{
- m_stream = NULL;
- m_buffer = NULL;
- m_size = 0;
-}
+ ArgsArray argv(wxCmdLineParser::ConvertStringToArgs(command,
+ wxCMD_LINE_SPLIT_UNIX));
-void wxStreamTempBuffer::Init(wxInputStream *stream)
-{
- m_stream = stream;
+ return wxExecute(argv, flags, process);
}
-void wxStreamTempBuffer::Update()
-{
- if ( m_stream && !m_stream->Eof() )
- {
- // realloc in blocks of 1Kb - surely not the best strategy but which
- // one is?
- static const size_t incSize = 1024;
-
- 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 += incSize;
- }
- }
-}
+#if wxUSE_UNICODE
-wxStreamTempBuffer::~wxStreamTempBuffer()
+long wxExecute(wchar_t **wargv, int flags, wxProcess *process)
{
- if ( m_buffer )
- {
- m_stream->Ungetch(m_buffer, m_size);
- free(m_buffer);
- }
+ ArgsArray argv(wargv);
+
+ return wxExecute(argv, flags, process);
}
-#endif // wxUSE_STREAMS
+#endif // wxUSE_UNICODE
-long wxExecute(wxChar **argv,
- bool sync,
- wxProcess *process)
+// wxExecute: the real worker function
+long wxExecute(char **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 ((sync) ? -1 : 0)
+ #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])
+#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
+
+#if defined(__WXCOCOA__) || ( defined(__WXOSX_MAC__) && wxOSX_USE_COCOA_OR_CARBON )
+ // wxMacLaunch() only executes app bundles and only does it asynchronously.
+ // It returns false if the target is not an app bundle, thus falling
+ // through to the regular code for non app bundles.
+ if ( !(flags & wxEXEC_SYNC) && wxMacLaunch(argv) )
{
- wxWX2MBbuf mb_arg = wxConvertWX2MB(argv[mb_argc]);
- mb_argv[mb_argc] = strdup(mb_arg);
- mb_argc++;
+ // we don't have any PID to return so just make up something non null
+ return -1;
}
- mb_argv[mb_argc] = (char *) NULL;
+#endif // __DARWIN__
- // 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
+ // this struct contains all information which we use for housekeeping
+ wxExecuteData execData;
+ execData.flags = flags;
+ execData.process = process;
-#if wxUSE_GUI
// create pipes
- int end_proc_detect[2];
- if ( pipe(end_proc_detect) == -1 )
+ if ( !execData.pipeEndProcDetect.Create() )
{
- wxLogSysError( _("Pipe creation failed") );
wxLogError( _("Failed to execute '%s'\n"), *argv );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
-#endif // wxUSE_GUI
// pipes for inter process communication
- int pipeIn[2], // stdin
- pipeOut[2], // stdout
- pipeErr[2]; // stderr
-
- pipeIn[0] = pipeIn[1] =
- pipeOut[0] = pipeOut[1] =
- pipeErr[0] = pipeErr[1] = -1;
+ wxPipe pipeIn, // stdin
+ pipeOut, // stdout
+ pipeErr; // stderr
if ( process && process->IsRedirected() )
{
- if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -1 || pipe(pipeErr) == -1 )
+ if ( !pipeIn.Create() || !pipeOut.Create() || !pipeErr.Create() )
{
-#if wxUSE_GUI
- // free previously allocated resources
- close(end_proc_detect[0]);
- close(end_proc_detect[1]);
-#endif // wxUSE_GUI
-
- wxLogSysError( _("Pipe creation failed") );
wxLogError( _("Failed to execute '%s'\n"), *argv );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
}
// fork the process
-#ifdef HAVE_VFORK
- pid_t pid = vfork();
+ //
+ // 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();
+ pid_t pid = fork();
#endif
-
- if ( pid == -1 ) // error?
+ if ( pid == -1 ) // error?
{
-#if wxUSE_GUI
- close(end_proc_detect[0]);
- close(end_proc_detect[1]);
- close(pipeIn[0]);
- close(pipeIn[1]);
- close(pipeOut[0]);
- close(pipeOut[1]);
- close(pipeErr[0]);
- close(pipeErr[1]);
-#endif // wxUSE_GUI
-
wxLogSysError( _("Fork failed") );
- ARGS_CLEANUP;
-
return ERROR_RETURN_CODE;
}
else if ( pid == 0 ) // we're in child
{
-#if wxUSE_GUI
- close(end_proc_detect[0]); // close reading side
-#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 ( !sync )
+ if ( !(flags & wxEXEC_SYNC) )
{
- for ( int fd = 0; fd < FD_SETSIZE; fd++ )
+ // 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[0] || fd == pipeOut[1] || fd == pipeErr[1]
-#if wxUSE_GUI
- || fd == end_proc_detect[1]
-#endif // wxUSE_GUI
- )
+ if ( fd == pipeIn[wxPipe::Read]
+ || fd == pipeOut[wxPipe::Write]
+ || fd == pipeErr[wxPipe::Write]
+ || fd == (execData.pipeEndProcDetect)[wxPipe::Write] )
{
// don't close this one, we still need it
continue;
}
- // leave stderr opened too, it won't do any hurm
+ // leave stderr opened too, it won't do any harm
if ( fd != STDERR_FILENO )
close(fd);
}
}
- // redirect stdio, stdout and stderr
- if ( pipeIn[0] != -1 )
+#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, it will be only closed when the process terminates resulting
+ // in a read notification to the parent
+ execData.pipeEndProcDetect.Detach(wxPipe::Write);
+ execData.pipeEndProcDetect.Close();
+
+ // redirect stdin, stdout and stderr
+ if ( pipeIn.IsOk() )
{
- if ( dup2(pipeIn[0], STDIN_FILENO) == -1 ||
- dup2(pipeOut[1], STDOUT_FILENO) == -1 ||
- dup2(pipeErr[1], STDERR_FILENO) == -1 )
+ 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"));
}
- close(pipeIn[0]);
- close(pipeOut[1]);
- close(pipeErr[1]);
+ pipeIn.Close();
+ pipeOut.Close();
+ pipeErr.Close();
}
- execvp (*mb_argv, mb_argv);
+ execvp(*argv, argv);
+
+ fprintf(stderr, "execvp(");
+ for ( char **a = argv; *a; a++ )
+ fprintf(stderr, "%s%s", a == argv ? "" : ", ", *a);
+ 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;
-
- // pipe initialization: construction of the wxStreams
-#if wxUSE_STREAMS
- wxStreamTempBuffer bufIn, bufErr;
-#endif // wxUSE_STREAMS
-
- if ( process && process->IsRedirected() )
- {
-#if wxUSE_STREAMS
- // in/out for subprocess correspond to our out/in
- wxOutputStream *outStream = new wxProcessFileOutputStream(pipeIn[1]);
- wxInputStream *inStream = new wxProcessFileInputStream(pipeOut[0]);
- wxInputStream *errStream = new wxProcessFileInputStream(pipeErr[0]);
-
- process->SetPipeStreams(inStream, outStream, errStream);
+ // save it for WaitForChild() use
+ execData.pid = pid;
- bufIn.Init(inStream);
- bufErr.Init(inStream);
-#endif // wxUSE_STREAMS
+ // prepare for IO redirection
- close(pipeIn[0]); // close reading side
- close(pipeOut[1]); // close writing side
- close(pipeErr[1]); // close writing side
- }
-
-#if wxUSE_GUI && !defined(__WXMICROWIN__)
- wxEndProcessData *data = new wxEndProcessData;
+#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;
- if ( sync )
+ if ( process && process->IsRedirected() )
{
- // 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;
- data->tag = wxAddProcessCallback(data, end_proc_detect[0]);
-
- close(end_proc_detect[1]); // close writing side
-
- wxBusyCursor bc;
- wxWindowDisabler wd;
+ wxOutputStream *inStream =
+ new wxFileOutputStream(pipeIn.Detach(wxPipe::Write));
- // data->pid will be set to 0 from GTK_EndProcessDetector when the
- // process terminates
- while ( data->pid != 0 )
- {
-#if wxUSE_STREAMS
- bufIn.Update();
- bufErr.Update();
-#endif // wxUSE_STREAMS
-
- // give GTK+ a chance to call GTK_EndProcessDetector here and
- // also repaint the GUI
- wxYield();
- }
+ const int fdOut = pipeOut.Detach(wxPipe::Read);
+ wxPipeInputStream *outStream = new wxPipeInputStream(fdOut);
- int exitcode = data->exitcode;
+ const int fdErr = pipeErr.Detach(wxPipe::Read);
+ wxPipeInputStream *errStream = new wxPipeInputStream(fdErr);
- delete data;
+ process->SetPipeStreams(outStream, inStream, errStream);
- 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;
- data->tag = wxAddProcessCallback(data, end_proc_detect[0]);
+ bufOut.Init(outStream);
+ bufErr.Init(errStream);
- close(end_proc_detect[1]); // close writing side
+ execData.bufOut = &bufOut;
+ execData.bufErr = &bufErr;
- return pid;
+ execData.fdOut = fdOut;
+ execData.fdErr = fdErr;
}
-#else // !wxUSE_GUI
- wxASSERT_MSG( sync, wxT("async execution not supported yet") );
+#endif // HAS_PIPE_INPUT_STREAM
- int exitcode = 0;
- if ( waitpid(pid, &exitcode, 0) == -1 || !WIFEXITED(exitcode) )
+ if ( pipeIn.IsOk() )
{
- wxLogSysError(_("Waiting for subprocess termination failed"));
+ pipeIn.Close();
+ pipeOut.Close();
+ pipeErr.Close();
}
- return exitcode;
-#endif // wxUSE_GUI
+ // 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;
+
+ 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( wxString() );
- wxString tmp;
- if ( home->IsEmpty() )
+ *home = wxGetUserHome();
+ wxString tmp;
+ if ( home->empty() )
*home = wxT("/");
#ifdef __VMS
- tmp = *home;
- if ( tmp.Last() != wxT(']'))
- if ( tmp.Last() != wxT('/')) *home << wxT('/');
+ 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
+wxString wxGetUserHome( const wxString &user )
{
struct passwd *who = (struct passwd *) NULL;
{
return ptr;
}
- if ((ptr = wxGetenv(wxT("USER"))) != NULL || (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
+
+ if ((ptr = wxGetenv(wxT("USER"))) != NULL ||
+ (ptr = wxGetenv(wxT("LOGNAME"))) != NULL)
{
- who = getpwnam(wxConvertWX2MB(ptr));
+ who = getpwnam(wxSafeConvertWX2MB(ptr));
}
- // We now make sure the the user exists!
- if (who == NULL)
+ // make sure the user exists!
+ if ( !who )
{
who = getpwuid(getuid());
}
who = getpwnam (user.mb_str());
}
- return wxConvertMB2WX(who ? who->pw_dir : 0);
+ 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") );
+ wxCHECK_MSG( buf, false, wxT("NULL pointer in wxGetHostNameInternal") );
*buf = wxT('\0');
bool ok = uname(&uts) != -1;
if ( ok )
{
- wxStrncpy(buf, wxConvertMB2WX(uts.nodename), sz - 1);
+ wxStrncpy(buf, wxSafeConvertMB2WX(uts.nodename), sz - 1);
buf[sz] = wxT('\0');
}
#elif defined(HAVE_GETHOSTNAME)
- bool ok = gethostname(buf, sz) != -1;
+ 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;
+ bool ok = false;
#endif // uname/gethostname
if ( !ok )
{
if ( !wxStrchr(buf, wxT('.')) )
{
- struct hostent *host = gethostbyname(wxConvertWX2MB(buf));
+ struct hostent *host = gethostbyname(wxSafeConvertWX2MB(buf));
if ( !host )
{
wxLogSysError(_("Cannot get the official hostname"));
- ok = FALSE;
+ ok = false;
}
else
{
// the canonical name
- wxStrncpy(buf, wxConvertMB2WX(host->h_name), sz);
+ wxStrncpy(buf, wxSafeConvertMB2WX(host->h_name), sz);
}
}
//else: it's already a FQDN (BSD behaves this way)
*buf = wxT('\0');
if ((who = getpwuid(getuid ())) != NULL)
{
- wxStrncpy (buf, wxConvertMB2WX(who->pw_name), sz - 1);
- return TRUE;
+ wxStrncpy (buf, wxSafeConvertMB2WX(who->pw_name), sz - 1);
+ return true;
}
- return FALSE;
+ return false;
}
bool wxGetUserName(wxChar *buf, int sz)
{
+#ifdef HAVE_PW_GECOS
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;
+ wxStrncpy (buf, wxSafeConvertMB2WX(who->pw_gecos), sz - 1);
+ return true;
}
- return FALSE;
+ return false;
+#else // !HAVE_PW_GECOS
+ return wxGetUserId(buf, sz);
+#endif // HAVE_PW_GECOS/!HAVE_PW_GECOS
}
-wxString wxGetOsDescription()
+bool wxIsPlatform64Bit()
{
-#ifndef WXWIN_OS_DESCRIPTION
- #error WXWIN_OS_DESCRIPTION should be defined in config.h by configure
-#else
- return WXWIN_OS_DESCRIPTION;
-#endif
+ 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"));
}
-// this function returns the GUI toolkit version in GUI programs, but OS
-// version in non-GUI ones
-#if !wxUSE_GUI
+// these functions are in mac/utils.cpp for wxMac
+#ifndef __WXMAC__
-int wxGetOsVersion(int *majorVsn, int *minorVsn)
+wxOperatingSystemId wxGetOsVersion(int *verMaj, int *verMin)
{
+ // get OS version
int major, minor;
- char name[256];
-
- if ( sscanf(WXWIN_OS_DESCRIPTION, "%s %d.%d", name, &major, &minor) != 3 )
+ wxString release = wxGetCommandOutput(wxT("uname -r"));
+ if ( release.empty() ||
+ wxSscanf(release.c_str(), wxT("%d.%d"), &major, &minor) != 2 )
{
- // unreckognized uname string format
- major = minor = -1;
+ // failed to get version string or unrecognized format
+ major =
+ minor = -1;
}
- if ( majorVsn )
- *majorVsn = major;
- if ( minorVsn )
- *minorVsn = minor;
+ 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 wxUNIX;
+ return wxPlatformInfo::GetOperatingSystemId(kernel);
+}
+
+wxString wxGetOsDescription()
+{
+ return wxGetCommandOutput(wxT("uname -s -r -m"));
}
-#endif // !wxUSE_GUI
+#endif // !__WXMAC__
+
+unsigned long wxGetProcessId()
+{
+ return (unsigned long)getpid();
+}
-long wxGetFreeMemory()
+wxMemorySize wxGetFreeMemory()
{
#if defined(__LINUX__)
// get it from /proc/meminfo
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);
+ // /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 memFree;
+ return (wxMemorySize)memFree;
}
-#elif defined(__SUN__) && defined(_SC_AVPHYS_PAGES)
- return 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(_SC_AVPHYS_PAGES)
+ return ((wxMemorySize)sysconf(_SC_AVPHYS_PAGES))*sysconf(_SC_PAGESIZE);
//#elif defined(__FREEBSD__) -- might use sysctl() to find it out, probably
#endif
return -1;
}
-bool wxGetDiskSpace(const wxString& path, wxLongLong *pTotal, wxLongLong *pFree)
+bool wxGetDiskSpace(const wxString& path, wxDiskspaceSize_t *pTotal, wxDiskspaceSize_t *pFree)
{
-#ifdef HAVE_STATFS
-
- struct statfs fs;
- if ( statfs(path, &fs) != 0 )
+#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("Failed to get file system statistics");
+ wxLogSysError( wxT("Failed to get file system statistics") );
- return FALSE;
+ 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 = wxLongLong(fs.f_blocks) * fs.f_bsize;
+ *pTotal = wxDiskspaceSize_t(fs.f_blocks) * blockSize;
}
if ( pFree )
{
- *pFree = wxLongLong(fs.f_bavail) * fs.f_bsize;
+ *pFree = wxDiskspaceSize_t(fs.f_bavail) * blockSize;
}
- return TRUE;
+ return true;
+#else // !HAVE_STATFS && !HAVE_STATVFS
+ return false;
#endif // HAVE_STATFS
-
- return FALSE;
}
// ----------------------------------------------------------------------------
// env vars
// ----------------------------------------------------------------------------
+#if USE_PUTENV
+
+WX_DECLARE_STRING_HASH_MAP(char *, wxEnvVars);
+
+static wxEnvVars gs_envVars;
+
+class wxSetEnvModule : public wxModule
+{
+public:
+ virtual bool OnInit() { return true; }
+ virtual void OnExit()
+ {
+ for ( wxEnvVars::const_iterator i = gs_envVars.begin();
+ i != gs_envVars.end();
+ ++i )
+ {
+ free(i->second);
+ }
+
+ gs_envVars.clear();
+ }
+
+ DECLARE_DYNAMIC_CLASS(wxSetEnvModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxSetEnvModule, wxModule)
+
+#endif // USE_PUTENV
+
bool wxGetEnv(const wxString& var, wxString *value)
{
// wxGetenv is defined as getenv()
- wxChar *p = wxGetenv(var);
+ char *p = wxGetenv(var);
if ( !p )
- return FALSE;
+ return false;
if ( value )
{
*value = p;
}
- return TRUE;
+ return true;
}
-bool wxSetEnv(const wxString& variable, const wxChar *value)
+static bool wxDoSetEnv(const wxString& variable, const char *value)
{
#if defined(HAVE_SETENV)
- return setenv(variable.mb_str(), value ? wxString(value).mb_str().data()
- : NULL, 1 /* overwrite */) == 0;
+ if ( !value )
+ {
+#ifdef HAVE_UNSETENV
+ // don't test unsetenv() return value: it's void on some systems (at
+ // least Darwin)
+ unsetenv(variable.mb_str());
+ return true;
+#else
+ value = ""; // we can't pass NULL to setenv()
+#endif
+ }
+
+ return setenv(variable.mb_str(), value, 1 /* overwrite */) == 0;
#elif defined(HAVE_PUTENV)
wxString s = variable;
if ( value )
s << _T('=') << value;
// transform to ANSI
- const char *p = s.mb_str();
+ const wxWX2MBbuf p = s.mb_str();
- // the string will be free()d by libc
char *buf = (char *)malloc(strlen(p) + 1);
strcpy(buf, p);
+ // store the string to free() it later
+ wxEnvVars::iterator i = gs_envVars.find(variable);
+ if ( i != gs_envVars.end() )
+ {
+ free(i->second);
+ i->second = buf;
+ }
+ else // this variable hadn't been set before
+ {
+ gs_envVars[variable] = buf;
+ }
+
return putenv(buf) == 0;
#else // no way to set an env var
- return FALSE;
+ return false;
#endif
}
+bool wxSetEnv(const wxString& variable, const wxString& value)
+{
+ return wxDoSetEnv(variable, value.mb_str());
+}
+
+bool wxUnsetEnv(const wxString& variable)
+{
+ return wxDoSetEnv(variable, NULL);
+}
+
// ----------------------------------------------------------------------------
// signal handling
// ----------------------------------------------------------------------------
#include <signal.h>
-static void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
+extern "C" void wxFatalSignalHandler(wxTYPE_SA_HANDLER)
{
if ( wxTheApp )
{
bool wxHandleFatalExceptions(bool doit)
{
// old sig handlers
- static bool s_savedHandlers = FALSE;
+ static bool s_savedHandlers = false;
static struct sigaction s_handlerFPE,
s_handlerILL,
s_handlerBUS,
s_handlerSEGV;
- bool ok = TRUE;
+ bool ok = true;
if ( doit && !s_savedHandlers )
{
// install the signal handler
wxLogDebug(_T("Failed to install our signal handler."));
}
- s_savedHandlers = TRUE;
+ s_savedHandlers = true;
}
else if ( s_savedHandlers )
{
wxLogDebug(_T("Failed to uninstall our signal handler."));
}
- s_savedHandlers = FALSE;
+ s_savedHandlers = false;
}
//else: nothing to do
#endif // wxUSE_ON_FATAL_EXCEPTION
// ----------------------------------------------------------------------------
-// error and debug output routines (deprecated, use wxLog)
+// wxExecute support
// ----------------------------------------------------------------------------
-void wxDebugMsg( const char *format, ... )
+int wxAppTraits::AddProcessCallback(wxEndProcessData *data, int fd)
+{
+ // define a custom handler processing only the closure of the descriptor
+ struct wxEndProcessFDIOHandler : public wxFDIOHandler
+ {
+ wxEndProcessFDIOHandler(wxEndProcessData *data, int fd)
+ : m_data(data), m_fd(fd)
+ {
+ }
+
+ virtual void OnReadWaiting()
+ {
+ wxFDIODispatcher::Get()->UnregisterFD(m_fd);
+ close(m_fd);
+
+ wxHandleProcessTermination(m_data);
+
+ delete this;
+ }
+
+ virtual void OnWriteWaiting() { wxFAIL_MSG("unreachable"); }
+ virtual void OnExceptionWaiting() { wxFAIL_MSG("unreachable"); }
+
+ wxEndProcessData * const m_data;
+ const int m_fd;
+ };
+
+ wxFDIODispatcher::Get()->RegisterFD
+ (
+ fd,
+ new wxEndProcessFDIOHandler(data, fd),
+ wxFDIO_INPUT
+ );
+ return fd; // unused, but return something unique for the tag
+}
+
+bool wxAppTraits::CheckForRedirectedIO(wxExecuteData& execData)
+{
+#if HAS_PIPE_INPUT_STREAM
+ bool hasIO = false;
+
+ if ( execData.bufOut && execData.bufOut->Update() )
+ hasIO = true;
+
+ if ( execData.bufErr && execData.bufErr->Update() )
+ hasIO = true;
+
+ return hasIO;
+#else // !HAS_PIPE_INPUT_STREAM
+ return false;
+#endif // HAS_PIPE_INPUT_STREAM/!HAS_PIPE_INPUT_STREAM
+}
+
+// helper classes/functions used by WaitForChild()
+namespace
+{
+
+// convenient base class for IO handlers which are registered for read
+// notifications only and which also stores the FD we're reading from
+//
+// the derived classes still have to implement OnReadWaiting()
+class wxReadFDIOHandler : public wxFDIOHandler
+{
+public:
+ wxReadFDIOHandler(wxFDIODispatcher& disp, int fd) : m_fd(fd)
+ {
+ if ( fd )
+ disp.RegisterFD(fd, this, wxFDIO_INPUT);
+ }
+
+ virtual void OnWriteWaiting() { wxFAIL_MSG("unreachable"); }
+ virtual void OnExceptionWaiting() { wxFAIL_MSG("unreachable"); }
+
+protected:
+ const int m_fd;
+
+ DECLARE_NO_COPY_CLASS(wxReadFDIOHandler)
+};
+
+// class for monitoring our end of the process detection pipe, simply sets a
+// flag when input on the pipe (which must be due to EOF) is detected
+class wxEndHandler : public wxReadFDIOHandler
+{
+public:
+ wxEndHandler(wxFDIODispatcher& disp, int fd)
+ : wxReadFDIOHandler(disp, fd)
+ {
+ m_terminated = false;
+ }
+
+ bool Terminated() const { return m_terminated; }
+
+ virtual void OnReadWaiting() { m_terminated = true; }
+
+private:
+ bool m_terminated;
+
+ DECLARE_NO_COPY_CLASS(wxEndHandler)
+};
+
+#if HAS_PIPE_INPUT_STREAM
+
+// class for monitoring our ends of child stdout/err, should be constructed
+// with the FD and stream from wxExecuteData and will do nothing if they're
+// invalid
+//
+// unlike wxEndHandler this class registers itself with the provided dispatcher
+class wxRedirectedIOHandler : public wxReadFDIOHandler
+{
+public:
+ wxRedirectedIOHandler(wxFDIODispatcher& disp,
+ int fd,
+ wxStreamTempInputBuffer *buf)
+ : wxReadFDIOHandler(disp, fd),
+ m_buf(buf)
+ {
+ }
+
+ virtual void OnReadWaiting()
+ {
+ m_buf->Update();
+ }
+
+private:
+ wxStreamTempInputBuffer * const m_buf;
+
+ DECLARE_NO_COPY_CLASS(wxRedirectedIOHandler)
+};
+
+#endif // HAS_PIPE_INPUT_STREAM
+
+// helper function which calls waitpid() and analyzes the result
+int DoWaitForChild(int pid, int flags = 0)
{
- va_list ap;
- va_start( ap, format );
- vfprintf( stderr, format, ap );
- fflush( stderr );
- va_end(ap);
+ wxASSERT_MSG( pid > 0, "invalid PID" );
+
+ int status, rc;
+
+ // loop while we're getting EINTR
+ for ( ;; )
+ {
+ rc = waitpid(pid, &status, flags);
+
+ if ( rc != -1 || errno != EINTR )
+ break;
+ }
+
+ if ( rc == 0 )
+ {
+ // This can only happen if the child application closes our dummy pipe
+ // that is used to monitor its lifetime; in that case, our best bet is
+ // to pretend the process did terminate, because otherwise wxExecute()
+ // would hang indefinitely (OnReadWaiting() won't be called again, the
+ // descriptor is closed now).
+ wxLogDebug("Child process (PID %d) still alive but pipe closed so "
+ "generating a close notification", pid);
+ }
+ else if ( rc == -1 )
+ {
+ wxLogLastError(wxString::Format("waitpid(%d)", pid));
+ }
+ else // child did terminate
+ {
+ wxASSERT_MSG( rc == pid, "unexpected waitpid() return value" );
+
+ if ( WIFEXITED(status) )
+ return WEXITSTATUS(status);
+ else if ( WIFSIGNALED(status) )
+ return -WTERMSIG(status);
+ else
+ {
+ wxLogError("Child process (PID %d) exited for unknown reason, "
+ "status = %d", pid, status);
+ }
+ }
+
+ return -1;
}
-void wxError( const wxString &msg, const wxString &title )
+} // anonymous namespace
+
+int wxAppTraits::WaitForChild(wxExecuteData& execData)
{
- 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") );
+ if ( !(execData.flags & wxEXEC_SYNC) )
+ {
+ // asynchronous execution: just launch the process and return,
+ // endProcData will be destroyed when it terminates (currently we leak
+ // it if the process doesn't terminate before we do and this should be
+ // fixed but it's not a real leak so it's not really very high
+ // priority)
+ wxEndProcessData *endProcData = new wxEndProcessData;
+ endProcData->process = execData.process;
+ endProcData->pid = execData.pid;
+ endProcData->tag = AddProcessCallback
+ (
+ endProcData,
+ execData.GetEndProcReadFD()
+ );
+ endProcData->async = true;
+
+ return execData.pid;
+ }
+ //else: synchronous execution case
+
+#if HAS_PIPE_INPUT_STREAM
+ wxProcess * const process = execData.process;
+ if ( process && process->IsRedirected() )
+ {
+ // we can't simply block waiting for the child to terminate as we would
+ // dead lock if it writes more than the pipe buffer size (typically
+ // 4KB) bytes of output -- it would then block waiting for us to read
+ // the data while we'd block waiting for it to terminate
+ //
+ // so multiplex here waiting for any input from the child or closure of
+ // the pipe used to indicate its termination
+ wxSelectDispatcher disp;
+
+ wxEndHandler endHandler(disp, execData.GetEndProcReadFD());
+
+ wxRedirectedIOHandler outHandler(disp, execData.fdOut, execData.bufOut),
+ errHandler(disp, execData.fdErr, execData.bufErr);
+
+ while ( !endHandler.Terminated() )
+ {
+ disp.Dispatch();
+ }
+ }
+ //else: no IO redirection, just block waiting for the child to exit
+#endif // HAS_PIPE_INPUT_STREAM
+
+ return DoWaitForChild(execData.pid);
}
-void wxFatalError( const wxString &msg, const wxString &title )
+void wxHandleProcessTermination(wxEndProcessData *data)
{
- 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()
+ data->exitcode = DoWaitForChild(data->pid, WNOHANG);
+
+ // notify user about termination if required
+ if ( data->process )
+ {
+ data->process->OnTerminate(data->pid, data->exitcode);
+ }
+
+ if ( data->async )
+ {
+ // in case of asynchronous execution we don't need this data any more
+ // after the child terminates
+ delete data;
+ }
+ else // sync execution
+ {
+ // let wxExecute() know that the process has terminated
+ data->pid = 0;
+ }
}
projects / wxWidgets.git / blobdiff