* first (raw and ineffient) implementation

[apt.git] / apt-pkg / deb / dpkgpm.cc

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index cebdafe7deecba82237eae18a8bb9ea2d5838ff0..9ca519acddb1de9259a81442d0d52ed1bbba2e48 100644 (file)
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -8,9 +8,6 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Includes                                                            /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/dpkgpm.h"
-#endif
 #include <apt-pkg/dpkgpm.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
@@ -28,6 +25,11 @@
 #include <sstream>
 #include <map>
 
+#include <termios.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <pty.h>
+
 #include <config.h>
 #include <apti18n.h>
                                                                        /*}}}*/
@@ -519,7 +521,24 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         it doesn't die but we do! So we must also ignore it */
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
       sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
-       
+
+      struct   termios tt;
+      struct   winsize win;
+      int      master;
+      int      slave;
+
+      tcgetattr(0, &tt);
+      ioctl(0, TIOCGWINSZ, (char *)&win);
+      if (openpty(&master, &slave, NULL, &tt, &win) < 0) {
+        fprintf(stderr, _("openpty failed\n"));
+      }
+
+      struct termios rtt;
+      rtt = tt;
+      cfmakeraw(&rtt);
+      rtt.c_lflag &= ~ECHO;
+      tcsetattr(0, TCSAFLUSH, &rtt);
+
        // Fork dpkg
       pid_t Child;
       _config->Set("APT::Keep-Fds::",fd[1]);
@@ -528,8 +547,16 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       // This is the child
       if (Child == 0)
       {
+        setsid();
+        ioctl(slave, TIOCSCTTY, 0);
+        close(master);
+        dup2(slave, 0);
+        dup2(slave, 1);
+        dup2(slave, 2);
+        close(slave);
+
         close(fd[0]); // close the read end of the pipe
-        
+
         if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0)
            _exit(100);
         
@@ -548,7 +575,8 @@ bool pkgDPkgPM::Go(int OutStatusFd)
            if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0)
               _exit(100);
         }
-        
+
+
         /* No Job Control Stop Env is a magic dpkg var that prevents it
            from using sigstop */
         putenv("DPKG_NO_TSTP=yes");
@@ -570,11 +598,19 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
       // the read buffers for the communication with dpkg
       char line[1024] = {0,};
+      
       char buf[2] = {0,0};
+      char term_buf[2] = {0,0};
+      char input_buf[2] = {0,0};
       
       // the result of the waitpid call
       int res;
-
+      close(slave);
+      fcntl(0, F_SETFL, O_NONBLOCK);
+      fcntl(master, F_SETFL, O_NONBLOCK);
+      FILE *term_out = fopen("/var/log/dpkg-out.log","a");
+      chmod("/var/log/dpkg-out.log", 0600);
+      
       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
         if(res < 0) {
            // FIXME: move this to a function or something, looks ugly here
@@ -588,18 +624,41 @@ bool pkgDPkgPM::Go(int OutStatusFd)
            signal(SIGINT,old_SIGINT);
            return _error->Errno("waitpid","Couldn't wait for subprocess");
         }
+
+        // wait for input or output here
+        
+        // FIXME: use select() instead of the rubish below
         
         // read a single char, make sure that the read can't block 
         // (otherwise we may leave zombies)
+         int term_len = read(master, term_buf, 1);
+        int input_len = read(0, input_buf, 1);
          int len = read(_dpkgin, buf, 1);
 
-        // nothing to read, wait a bit for more
+        // see if we have any input that needs to go to the 
+        // master pty
+        if(input_len > 0) 
+           write(master, input_buf, 1);
+
+        // see if we have any output that needs to be echoed
+        // and written to the log
+        if(term_len > 0) 
+        {
+           do
+           {
+              fwrite(term_buf, 1, 1, term_out);
+              write(1, term_buf, 1);
+           } while(read(master, term_buf, 1) > 0);
+           term_buf[0] = 0;
+        }
+
+        // nothing to read from dpkg , wait a bit for more
         if(len <= 0)
         {
            usleep(1000);
            continue;
         }
-        
+
         // sanity check (should never happen)
         if(strlen(line) >= sizeof(line)-10)
         {
@@ -705,10 +764,13 @@ bool pkgDPkgPM::Go(int OutStatusFd)
         line[0]=0;
       }
       close(_dpkgin);
+      fclose(term_out);
 
       // Restore sig int/quit
       signal(SIGQUIT,old_SIGQUIT);
       signal(SIGINT,old_SIGINT);
+
+      tcsetattr(0, TCSAFLUSH, &tt);
        
       // Check for an error code.
       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)