X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/d4db3e0afce3492d75ab2226393f93e58b0fbfde..110277098f846c98cbb1f155fe7d53ecca64cc1a:/apt-pkg/deb/dpkgpm.cc

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index 36086d72e..11bf827d7 100644
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -44,8 +44,8 @@ using namespace std;
 // ---------------------------------------------------------------------
 /* */
 pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) 
-   : pkgPackageManager(Cache), dpkgbuf_pos(0), PackagesDone(0), 
-     PackagesTotal(0), term_out(NULL)
+   : pkgPackageManager(Cache), dpkgbuf_pos(0),
+     term_out(NULL), PackagesDone(0), PackagesTotal(0)
 {
 }
 									/*}}}*/
@@ -342,9 +342,12 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 */
 void pkgDPkgPM::DoStdin(int master)
 {
-   char input_buf[256] = {0,}; 
-   int len = read(0, input_buf, sizeof(input_buf));
-   write(master, input_buf, len);
+   unsigned char input_buf[256] = {0,}; 
+   ssize_t len = read(0, input_buf, sizeof(input_buf));
+   if (len)
+      write(master, input_buf, len);
+   else
+      stdin_is_dev_null = true;
 }
 									/*}}}*/
 // DPkgPM::DoTerminalPty - Read the terminal pty and write log		/*{{{*/
@@ -354,10 +357,18 @@ void pkgDPkgPM::DoStdin(int master)
  */
 void pkgDPkgPM::DoTerminalPty(int master)
 {
-   char term_buf[1024] = {0,};
+   unsigned char term_buf[1024] = {0,0, };
 
-   int len=read(master, term_buf, sizeof(term_buf));
-   if(len <= 0)
+   ssize_t len=read(master, term_buf, sizeof(term_buf));
+   if(len == -1 && errno == EIO)
+   {
+      // this happens when the child is about to exit, we
+      // give it time to actually exit, otherwise we run
+      // into a race
+      usleep(500000);
+      return;
+   }  
+   if(len <= 0) 
       return;
    write(1, term_buf, len);
    if(term_out)
@@ -392,14 +403,14 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line)
    //        statusfd or by rewriting the code here to deal with
    //        it. for now we just ignore it and not crash
    TokSplitString(':', line, list, sizeof(list)/sizeof(list[0]));
-   char *pkg = list[1];
-   char *action = _strstrip(list[2]);
-   if( pkg == NULL || action == NULL) 
+   if( list[0] == NULL || list[1] == NULL || list[2] == NULL) 
    {
       if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true)
 	 std::clog << "ignoring line: not enough ':'" << std::endl;
       return;
    }
+   char *pkg = list[1];
+   char *action = _strstrip(list[2]);
 
    if(strncmp(action,"error",strlen("error")) == 0)
    {
@@ -495,6 +506,67 @@ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd)
 }
 									/*}}}*/
 
+bool pkgDPkgPM::OpenLog()
+{
+   string logdir = _config->FindDir("Dir::Log");
+   if(not FileExists(logdir))
+      return _error->Error(_("Directory '%s' missing"), logdir.c_str());
+   string logfile_name = flCombine(logdir,
+				   _config->Find("Dir::Log::Terminal"));
+   if (!logfile_name.empty())
+   {
+      term_out = fopen(logfile_name.c_str(),"a");
+      chmod(logfile_name.c_str(), 0600);
+      // output current time
+      char outstr[200];
+      time_t t = time(NULL);
+      struct tm *tmp = localtime(&t);
+      strftime(outstr, sizeof(outstr), "%F  %T", tmp);
+      fprintf(term_out, "\nLog started: ");
+      fprintf(term_out, outstr);
+      fprintf(term_out, "\n");
+   }
+   return true;
+}
+
+bool pkgDPkgPM::CloseLog()
+{
+   if(term_out)
+   {
+      char outstr[200];
+      time_t t = time(NULL);
+      struct tm *tmp = localtime(&t);
+      strftime(outstr, sizeof(outstr), "%F  %T", tmp);
+      fprintf(term_out, "Log ended: ");
+      fprintf(term_out, outstr);
+      fprintf(term_out, "\n");
+      fclose(term_out);
+   }
+   term_out = NULL;
+   return true;
+}
+
+/*{{{*/
+// This implements a racy version of pselect for those architectures
+// that don't have a working implementation.
+// FIXME: Probably can be removed on Lenny+1
+static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds,
+   fd_set *exceptfds, const struct timespec *timeout,
+   const sigset_t *sigmask)
+{
+   sigset_t origmask;
+   struct timeval tv;
+   int retval;
+
+   tv.tv_sec = timeout->tv_sec;
+   tv.tv_usec = timeout->tv_nsec/1000;
+
+   sigprocmask(SIG_SETMASK, sigmask, &origmask);
+   retval = select(nfds, readfds, writefds, exceptfds, &tv);
+   sigprocmask(SIG_SETMASK, &origmask, 0);
+   return retval;
+}
+/*}}}*/
 
 // DPkgPM::Go - Run the sequence					/*{{{*/
 // ---------------------------------------------------------------------
@@ -570,25 +642,10 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       }
    }   
 
+   stdin_is_dev_null = false;
+
    // create log
-   string logdir = _config->FindDir("Dir::Log");
-   if(not FileExists(logdir))
-      return _error->Error(_("Directory '%s' missing"), logdir.c_str());
-   string logfile_name = flCombine(logdir,
-				   _config->Find("Dir::Log::Terminal"));
-   if (!logfile_name.empty())
-   {
-      term_out = fopen(logfile_name.c_str(),"a");
-      chmod(logfile_name.c_str(), 0600);
-      // output current time
-      char outstr[200];
-      time_t t = time(NULL);
-      struct tm *tmp = localtime(&t);
-      strftime(outstr, sizeof(outstr), "%F  %T", tmp);
-      fprintf(term_out, "\nLog started: ");
-      fprintf(term_out, outstr);
-      fprintf(term_out, "\n");
-   }
+   OpenLog();
 
    // this loop is runs once per operation
    for (vector<Item>::iterator I = List.begin(); I != List.end();)
@@ -770,7 +827,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
 	 /* No Job Control Stop Env is a magic dpkg var that prevents it
 	    from using sigstop */
-	 putenv("DPKG_NO_TSTP=yes");
+	 putenv((char *)"DPKG_NO_TSTP=yes");
 	 execvp(Args[0],(char **)Args);
 	 cerr << "Could not exec dpkg!" << endl;
 	 _exit(100);
@@ -793,7 +850,12 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
       // setups fds
       fd_set rfds;
-      struct timeval tv;
+      struct timespec tv;
+      sigset_t sigmask;
+      sigset_t original_sigmask;
+      sigemptyset(&sigmask);
+      sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask);
+
       int select_ret;
       while ((res=waitpid(Child,&Status, WNOHANG)) != Child) {
 	 if(res < 0) {
@@ -811,19 +873,28 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
 	 // wait for input or output here
 	 FD_ZERO(&rfds);
-	 FD_SET(0, &rfds); 
+	 if (!stdin_is_dev_null)
+	    FD_SET(0, &rfds); 
 	 FD_SET(_dpkgin, &rfds);
 	 if(master >= 0)
 	    FD_SET(master, &rfds);
 	 tv.tv_sec = 1;
-	 tv.tv_usec = 0;
-	 select_ret = select(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv);
-	 if (select_ret < 0) {
-	    std::cerr << "Error in select()" << std::endl;
-	    continue;
-	 } else if (select_ret == 0)
-	    continue;
-
+	 tv.tv_nsec = 0;
+	 select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL, 
+			      &tv, &original_sigmask);
+	 if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS))
+	    select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL,
+				      NULL, &tv, &original_sigmask);
+	 if (select_ret == 0) 
+  	    continue;
+  	 else if (select_ret < 0 && errno == EINTR)
+  	    continue;
+  	 else if (select_ret < 0) 
+ 	 {
+  	    perror("select() returned error");
+  	    continue;
+  	 } 
+	 
 	 if(master >= 0 && FD_ISSET(master, &rfds))
 	    DoTerminalPty(master);
 	 if(master >= 0 && FD_ISSET(0, &rfds))
@@ -837,8 +908,11 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       signal(SIGQUIT,old_SIGQUIT);
       signal(SIGINT,old_SIGINT);
 
-      if(master >= 0 && slave >= 0)
+      if(master >= 0) 
+      {
 	 tcsetattr(0, TCSAFLUSH, &tt);
+	 close(master);
+      }
        
       // Check for an error code.
       if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
@@ -860,14 +934,12 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 
 	 if(stopOnError) 
 	 {
-	    if(term_out)
-	       fclose(term_out);
+	    CloseLog();
 	    return false;
 	 }
       }      
    }
-   if(term_out)
-      fclose(term_out);
+   CloseLog();
 
    if (RunScripts("DPkg::Post-Invoke") == false)
       return false;