author | erik <erik> | 2007-04-20 21:21:14 (UTC) |
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committer | erik <erik> | 2007-04-20 21:21:14 (UTC) |
commit | d07beba6b9351c6b575235522781e3ce8495e578 (patch) (side-by-side diff) | |
tree | 8c5d9cca84d79d7d3016ceb187a1a67a8adba662 /core | |
parent | fb862bdc6c9a6f5b6e7529823eb4b56cc7085a59 (diff) | |
download | opie-d07beba6b9351c6b575235522781e3ce8495e578.zip opie-d07beba6b9351c6b575235522781e3ce8495e578.tar.gz opie-d07beba6b9351c6b575235522781e3ce8495e578.tar.bz2 |
additional info to a comment about pty mangling
-rw-r--r-- | core/apps/embeddedkonsole/MyPty.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/core/apps/embeddedkonsole/MyPty.cpp b/core/apps/embeddedkonsole/MyPty.cpp index 4b1ae59..c11889e 100644 --- a/core/apps/embeddedkonsole/MyPty.cpp +++ b/core/apps/embeddedkonsole/MyPty.cpp @@ -68,193 +68,193 @@ #include <qapplication.h> #include <qsocketnotifier.h> #include <stdlib.h> #include <stdio.h> #include <signal.h> #include <fcntl.h> #include <unistd.h> #include <termios.h> #include <sys/types.h> #include <sys/ioctl.h> #include <sys/wait.h> #ifdef HAVE_OPENPTY #include <pty.h> #endif #include "MyPty.h" #undef VERBOSE_DEBUG /* -------------------------------------------------------------------------- */ /*! Informs the client program about the actual size of the window. */ void MyPty::setSize(int lines, int columns) { struct winsize wsize; wsize.ws_row = (unsigned short)lines; wsize.ws_col = (unsigned short)columns; if(fd < 0) return; ioctl(fd,TIOCSWINSZ,(char *)&wsize); } void MyPty::donePty() { // This is code from the Qt DumbTerminal example int status = 0; ::close(fd); if (cpid) { kill(cpid, SIGHUP); waitpid(cpid, &status, 0); } emit done(status); } const char* MyPty::deviceName() { return ttynam; } void MyPty::error() { // This is code from the Qt DumbTerminal example donePty(); } /*! start the client program. */ int MyPty::run(const char* cmd, QStrList &, const char*, int) { // This is code from the Qt DumbTerminal example cpid = fork(); if ( !cpid ) { // child - exec shell on tty for (int sig = 1; sig < NSIG; sig++) signal(sig,SIG_DFL); // attempt to keep apm driver from killing us on power on/off signal(SIGSTOP, SIG_IGN); signal(SIGCONT, SIG_IGN); signal(SIGTSTP, SIG_IGN); int ttyfd = open(ttynam, O_RDWR); dup2(ttyfd, STDIN_FILENO); dup2(ttyfd, STDOUT_FILENO); dup2(ttyfd, STDERR_FILENO); // should be done with tty, so close it close(ttyfd); static struct termios ttmode; if ( setsid() < 0 ) perror( "failed to set process group" ); #if defined (TIOCSCTTY) - // grabbed from APUE by Stevens + // grabbed from APUE by Stevens (see section 9.6, should be page 246) ioctl(STDIN_FILENO, TIOCSCTTY, 0); #endif tcgetattr( STDIN_FILENO, &ttmode ); ttmode.c_cc[VINTR] = 3; ttmode.c_cc[VERASE] = 8; tcsetattr( STDIN_FILENO, TCSANOW, &ttmode ); if(strlen(getenv("TERM"))<=0) setenv("TERM","vt100",1); setenv("COLORTERM","0",1); if (getuid() == 0) { char msg[] = "WARNING: You are running this shell as root!\n"; write(ttyfd, msg, sizeof(msg)); } QString ccmd = "-"+QFileInfo(cmd).fileName(); //creates a login shell execl(cmd, ccmd.latin1(), 0); donePty(); exit(-1); } // parent - continue as a widget QSocketNotifier* sn_r = new QSocketNotifier(fd,QSocketNotifier::Read,this); QSocketNotifier* sn_e = new QSocketNotifier(fd,QSocketNotifier::Exception,this); connect(sn_r,SIGNAL(activated(int)),this,SLOT(readPty())); connect(sn_e,SIGNAL(activated(int)),this,SLOT(error())); return 0; } int MyPty::openPty() { // This is code from the Qt DumbTerminal example int ptyfd = -1; #ifdef HAVE_OPENPTY int ttyfd; if ( openpty(&ptyfd,&ttyfd,ttynam,0,0) ) ptyfd = -1; else close(ttyfd); // we open the ttynam ourselves. #else for (const char* c0 = "pqrstuvwxyzabcde"; ptyfd < 0 && *c0 != 0; c0++) { for (const char* c1 = "0123456789abcdef"; ptyfd < 0 && *c1 != 0; c1++) { sprintf(ptynam,"/dev/pty%c%c",*c0,*c1); sprintf(ttynam,"/dev/tty%c%c",*c0,*c1); if ((ptyfd = ::open(ptynam,O_RDWR)) >= 0) { if (geteuid() != 0 && !access(ttynam,R_OK|W_OK) == 0) { ::close(ptyfd); ptyfd = -1; } } } } #endif if ( ptyfd < 0 ) { qApp->exit(1); return -1; } return ptyfd; } /*! Create an instance. */ MyPty::MyPty() : cpid(0) { fd = openPty(); } /*! Destructor. Note that the related client program is not killed (yet) when a instance is deleted. */ MyPty::~MyPty() { donePty(); } /*! sends len bytes through the line */ void MyPty::send_bytes(const char* s, int len) { #ifdef VERBOSE_DEBUG // verbose debug printf("sending bytes:\n"); for (int i = 0; i < len; i++) printf("%c", s[i]); printf("\n"); |