X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/6dc6fda69441fa0ae3204a1a818224626b7cc1c1..6342bd1ab36c1957684c00d408d09fba65d33db6:/src/unix/utilsunx.cpp diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp index 3b09340bec..b2fa90d046 100644 --- a/src/unix/utilsunx.cpp +++ b/src/unix/utilsunx.cpp @@ -20,15 +20,24 @@ #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/stream.h" + #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 #include #include @@ -203,15 +212,37 @@ long wxExecute( const wxString& command, bool sync, wxProcess *process ) return lRc; } -bool wxShell(const wxString& command) +// ---------------------------------------------------------------------------- +// wxShell +// ---------------------------------------------------------------------------- + +static wxString wxMakeShellCommand(const wxString& command) { wxString cmd; - if ( !!command ) - cmd.Printf(wxT("xterm -e %s"), command.c_str()); + if ( !command ) + { + // just an interactive shell + cmd = _T("xterm"); + } else - cmd = command; + { + // execute command in a shell + cmd << _T("/bin/sh -c '") << command << _T('\''); + } - return wxExecute(cmd) != 0; + return cmd; +} + +bool wxShell(const wxString& command) +{ + return wxExecute(wxMakeShellCommand(command), TRUE /* 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); } #if wxUSE_GUI @@ -268,17 +299,115 @@ void wxHandleProcessTermination(wxEndProcessData *proc_data) #endif // wxUSE_GUI -#if wxUSE_GUI - #define WXUNUSED_UNLESS_GUI(p) p -#else - #define WXUNUSED_UNLESS_GUI(p) -#endif +// ---------------------------------------------------------------------------- +// wxStream classes to support IO redirection in wxExecute +// ---------------------------------------------------------------------------- + +class wxProcessFileInputStream : public wxInputStream +{ +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 +{ +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; + + // check if there is any input available + struct timeval tv; + tv.tv_sec = 0; + tv.tv_usec = 0; + + fd_set readfds; + FD_ZERO(&readfds); + FD_SET(m_fd, &readfds); + switch ( select(m_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: check if there is any + return wxInputStream::Eof(); + } +} + +size_t wxProcessFileInputStream::OnSysRead(void *buffer, size_t bufsize) +{ + int ret = read(m_fd, buffer, bufsize); + if ( ret == 0 ) + { + m_lasterror = wxSTREAM_EOF; + } + else if ( ret == -1 ) + { + m_lasterror = wxSTREAM_READ_ERROR; + ret = 0; + } + else + { + m_lasterror = wxSTREAM_NOERROR; + } + + return ret; +} + +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 + { + m_lasterror = wxSTREAM_NOERROR; + } + + return ret; +} long wxExecute(wxChar **argv, bool sync, - wxProcess * WXUNUSED_UNLESS_GUI(process)) + wxProcess *process) { - wxCHECK_MSG( *argv, 0, wxT("can't exec empty command") ); + // for the sync execution, we return -1 to indicate failure, but for async + // cse we return 0 which is never a valid PID + long errorRetCode = sync ? -1 : 0; + + wxCHECK_MSG( *argv, errorRetCode, wxT("can't exec empty command") ); #if wxUSE_UNICODE int mb_argc = 0; @@ -286,9 +415,9 @@ long wxExecute(wxChar **argv, while (argv[mb_argc]) { - wxWX2MBbuf mb_arg = wxConvertWX2MB(argv[mb_argc]); - mb_argv[mb_argc] = strdup(mb_arg); - mb_argc++; + wxWX2MBbuf mb_arg = wxConvertWX2MB(argv[mb_argc]); + mb_argv[mb_argc] = strdup(mb_arg); + mb_argc++; } mb_argv[mb_argc] = (char *) NULL; @@ -306,91 +435,158 @@ long wxExecute(wxChar **argv, #if wxUSE_GUI // create pipes int end_proc_detect[2]; - if (pipe(end_proc_detect) == -1) + if ( pipe(end_proc_detect) == -1 ) { wxLogSysError( _("Pipe creation failed") ); + wxLogError( _("Failed to execute '%s'\n"), *argv ); ARGS_CLEANUP; - return 0; + return errorRetCode; } #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; + + if ( process && process->IsRedirected() ) + { + if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -1 || pipe(pipeErr) == -1 ) + { +#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 errorRetCode; + } + } + // fork the process #ifdef HAVE_VFORK pid_t pid = vfork(); #else pid_t pid = fork(); #endif - if (pid == -1) + + 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 0; + return errorRetCode; } - else if (pid == 0) + else if ( pid == 0 ) // we're in child { #if wxUSE_GUI - // we're in child close(end_proc_detect[0]); // close reading side #endif // wxUSE_GUI - // These three lines close the open file descriptors to to avoid any + // 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 == 0) + // one wants proper IO for the subprocess, the right thing to do is to + // start an xterm executing it. + if ( !sync ) { - // leave stderr opened, it won't do any hurm for ( int fd = 0; fd < FD_SETSIZE; fd++ ) { + if ( fd == pipeIn[0] || fd == pipeOut[1] || fd == pipeErr[1] #if wxUSE_GUI - if ( fd == end_proc_detect[1] ) - continue; + || fd == end_proc_detect[1] #endif // wxUSE_GUI + ) + { + // don't close this one, we still need it + continue; + } + // leave stderr opened too, it won't do any hurm if ( fd != STDERR_FILENO ) close(fd); } } -#if 0 - close(STDERR_FILENO); + // redirect stdio, stdout and stderr + if ( pipeIn[0] != -1 ) + { + if ( dup2(pipeIn[0], STDIN_FILENO) == -1 || + dup2(pipeOut[1], STDOUT_FILENO) == -1 || + dup2(pipeErr[1], STDERR_FILENO) == -1 ) + { + wxLogSysError(_("Failed to redirect child process input/output")); + } - // some programs complain about stderr not being open, so redirect - // them: - open("/dev/null", O_RDONLY); // stdin - open("/dev/null", O_WRONLY); // stdout - open("/dev/null", O_WRONLY); // stderr -#endif + close(pipeIn[0]); + close(pipeOut[1]); + close(pipeErr[1]); + } execvp (*mb_argv, mb_argv); // there is no return after successful exec() - wxFprintf(stderr, _("Can't execute '%s'\n"), *argv); - _exit(-1); } - else + else // we're in parent { + ARGS_CLEANUP; + + // pipe initialization: construction of the wxStreams + if ( process && process->IsRedirected() ) + { + // These two streams are relative to this process. + wxOutputStream *outStream = new wxProcessFileOutputStream(pipeIn[1]); + wxInputStream *inStream = new wxProcessFileInputStream(pipeOut[0]); + wxInputStream *errStream = new wxProcessFileInputStream(pipeErr[0]); + + close(pipeIn[0]); // close reading side + close(pipeOut[1]); // close writing side + close(pipeErr[1]); // close writing side + + process->SetPipeStreams(inStream, outStream, errStream); + } + #if wxUSE_GUI wxEndProcessData *data = new wxEndProcessData; - ARGS_CLEANUP; - if ( sync ) { - wxASSERT_MSG( !process, wxT("wxProcess param ignored for sync exec") ); + // 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]); - // we're in parent + close(end_proc_detect[1]); // close writing side + wxBusyCursor bc; + wxWindowDisabler wd; + // it will be set to 0 from GTK_EndProcessDetector while (data->pid != 0) wxYield(); @@ -401,15 +597,15 @@ long wxExecute(wxChar **argv, return exitcode; } - else + 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]); - // we're in parent + data->process = process; + data->pid = pid; + data->tag = wxAddProcessCallback(data, end_proc_detect[0]); + close(end_proc_detect[1]); // close writing side return pid; @@ -426,11 +622,17 @@ long wxExecute(wxChar **argv, return exitcode; #endif // wxUSE_GUI } +#ifdef __VMS + // VMS does not recognise exit as a return and complains about + // a missing return + // I think VMS is wrong in this + // JJ return 0; - - #undef ARGS_CLEANUP +#endif } +#undef ARGS_CLEANUP + // ---------------------------------------------------------------------------- // file and directory functions // ---------------------------------------------------------------------------- @@ -585,7 +787,7 @@ bool wxGetUserName(wxChar *buf, int sz) if ((who = getpwuid (getuid ())) != NULL) { // pw_gecos field in struct passwd is not standard -#if HAVE_PW_GECOS +#ifdef HAVE_PW_GECOS char *comma = strchr(who->pw_gecos, ','); if (comma) *comma = '\0'; // cut off non-name comment fields @@ -608,6 +810,133 @@ wxString wxGetOsDescription() #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 + +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; +} + +// ---------------------------------------------------------------------------- +// signal handling +// ---------------------------------------------------------------------------- + +#if wxUSE_ON_FATAL_EXCEPTION + +#include + +static 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) // ----------------------------------------------------------------------------