X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/0fcdf6dcc5cddb2bed3fda05b29fdf3d250ef045..5f9fd7ea86d211e3681a71c9f70303aa72b5de3c:/src/unix/utilsunx.cpp diff --git a/src/unix/utilsunx.cpp b/src/unix/utilsunx.cpp index e721318d5b..fb8c58bc90 100644 --- a/src/unix/utilsunx.cpp +++ b/src/unix/utilsunx.cpp @@ -23,8 +23,13 @@ #include "wx/utils.h" #include "wx/process.h" +#include "wx/thread.h" -#include "wx/unix/execute.h" +#include "wx/stream.h" + +#if wxUSE_GUI + #include "wx/unix/execute.h" +#endif #include #include @@ -40,9 +45,7 @@ #include // for O_WRONLY and friends #include // nanosleep() and/or usleep() #include // isspace() - -// JACS: needed for FD_SETSIZE -#include +#include // needed for FD_SETSIZE #ifdef HAVE_UNAME #include // for uname() @@ -64,20 +67,21 @@ #ifdef __SUN__ int usleep(unsigned int usec); #else // !Sun - #ifdef __EMX__ - /* I copied this from the XFree86 diffs. AV. */ - #define INCL_DOSPROCESS - #include - void usleep(unsigned long delay) - { - DosSleep(delay ? (delay/1000l) : 1l); - } - #else - void usleep(unsigned long usec); - #endif + #ifdef __EMX__ + /* I copied this from the XFree86 diffs. AV. */ + #define INCL_DOSPROCESS + #include + 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 + + #define HAVE_USLEEP 1 #endif // Unices without usleep() // ============================================================================ @@ -95,14 +99,14 @@ void wxSleep(int nSecs) void wxUsleep(unsigned long milliseconds) { -#ifdef HAVE_NANOSLEEP +#if defined(HAVE_NANOSLEEP) timespec tmReq; - tmReq.tv_sec = milliseconds / 1000; + 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 ) +#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 @@ -112,6 +116,9 @@ void wxUsleep(unsigned long milliseconds) #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 @@ -123,7 +130,7 @@ void wxUsleep(unsigned long milliseconds) int wxKill(long pid, wxSignal sig) { - return kill(pid, (int)sig); + return kill((pid_t)pid, (int)sig); } #define WXEXECUTE_NARGS 127 @@ -198,17 +205,41 @@ 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 + void wxHandleProcessTermination(wxEndProcessData *proc_data) { int pid = (proc_data->pid > 0) ? proc_data->pid : -(proc_data->pid); @@ -217,9 +248,24 @@ void wxHandleProcessTermination(wxEndProcessData *proc_data) // systems wait() might be used instead in a loop (until the right pid // terminates) int status = 0; - if ( waitpid(pid, &status, 0) == -1 || !WIFEXITED(status) ) + int rc; + + // wait for child termination and if waitpid() was interrupted, try again + do + { + rc = waitpid(pid, &status, 0); + } + while ( rc == -1 && errno == EINTR ); + + + if( rc == -1 || ! (WIFEXITED(status) || WIFSIGNALED(status)) ) { - wxLogSysError(_("Waiting for subprocess termination failed")); + wxLogSysError(_("Waiting for subprocess termination failed")); + /* AFAIK, this can only happen if something went wrong within + wxGTK, i.e. due to a race condition or some serious bug. + After having fixed the order of statements in + GTK_EndProcessDetector(). (KB) + */ } else { @@ -229,23 +275,126 @@ void wxHandleProcessTermination(wxEndProcessData *proc_data) proc_data->process->OnTerminate(proc_data->pid, WEXITSTATUS(status)); } + // clean up + if ( proc_data->pid > 0 ) + { + delete proc_data; + } + else + { + // wxExecute() will know about it + proc_data->exitcode = status; + + proc_data->pid = 0; + } } +} - // clean up - if ( proc_data->pid > 0 ) +#endif // wxUSE_GUI + +// ---------------------------------------------------------------------------- +// 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 ) { - delete proc_data; + m_lasterror = wxSTREAM_EOF; + } + else if ( ret == -1 ) + { + m_lasterror = wxSTREAM_READ_ERROR; + ret = 0; } else { - // wxExecute() will know about it - proc_data->exitcode = status; + m_lasterror = wxSTREAM_NOERROR; + } + + return ret; +} - proc_data->pid = 0; +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 *process ) +long wxExecute(wxChar **argv, + bool sync, + wxProcess *process) { wxCHECK_MSG( *argv, 0, wxT("can't exec empty command") ); @@ -255,9 +404,9 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process ) 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; @@ -275,9 +424,10 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process ) #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; @@ -285,81 +435,137 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process ) } #endif // wxUSE_GUI + int pipeIn[2]; + int pipeOut[2]; + pipeIn[0] = pipeIn[1] = + pipeOut[0] = pipeOut[1] = -1; + + if ( process && process->IsRedirected() ) + { + if ( pipe(pipeIn) == -1 || pipe(pipeOut) == -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 0; + } + } + // 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]); +#endif // wxUSE_GUI + wxLogSysError( _("Fork failed") ); ARGS_CLEANUP; return 0; } - 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] #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 and stdout + // (TODO: what about stderr?) + if ( pipeIn[0] != -1 ) + { + if ( dup2(pipeIn[0], STDIN_FILENO) == -1 || + dup2(pipeOut[1], STDOUT_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]); + } 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 { -#if wxUSE_GUI - // we're in parent - close(end_proc_detect[1]); // close writing side + ARGS_CLEANUP; - wxEndProcessData *data = new wxEndProcessData; - data->tag = wxAddProcessCallback(data, end_proc_detect[0]); + // 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]); + close(pipeIn[0]); // close reading side + close(pipeOut[1]); // close writing side - ARGS_CLEANUP; + process->SetPipeStreams(inStream, outStream); + } + +#if wxUSE_GUI + wxEndProcessData *data = new wxEndProcessData; 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]); + + 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) @@ -371,13 +577,16 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process ) return exitcode; } - else + else // async execution { // async execution, nothing special to do - caller will be - // notified about the process terminationif process != NULL, data + // notified about the process termination if process != NULL, data // will be deleted in GTK_EndProcessDetector - data->process = process; - data->pid = pid; + data->process = process; + data->pid = pid; + data->tag = wxAddProcessCallback(data, end_proc_detect[0]); + + close(end_proc_detect[1]); // close writing side return pid; } @@ -394,6 +603,8 @@ long wxExecute( wxChar **argv, bool sync, wxProcess *process ) #endif // wxUSE_GUI } + return 0; + #undef ARGS_CLEANUP } @@ -546,24 +757,34 @@ bool wxGetUserId(wxChar *buf, int sz) bool wxGetUserName(wxChar *buf, int sz) { struct passwd *who; - char *comma; *buf = wxT('\0'); - if ((who = getpwuid (getuid ())) != NULL) { -#ifndef __VMS__ - comma = strchr(who->pw_gecos, ','); + if ((who = getpwuid (getuid ())) != NULL) + { + // pw_gecos field in struct passwd is not standard +#if 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 +#else // !HAVE_PW_GECOS wxStrncpy (buf, wxConvertMB2WX(who->pw_name), sz - 1); -#endif +#endif // HAVE_PW_GECOS/!HAVE_PW_GECOS return TRUE; } return FALSE; } +wxString wxGetOsDescription() +{ +#ifndef WXWIN_OS_DESCRIPTION + #error WXWIN_OS_DESCRIPTION should be defined in config.h by configure +#else + return WXWIN_OS_DESCRIPTION; +#endif +} + // ---------------------------------------------------------------------------- // error and debug output routines (deprecated, use wxLog) // ----------------------------------------------------------------------------