merge from apt--mvo

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

diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc
index e1e26e903c1da4200b6d34312082007db46beb55..afedc3c13b41072f58089b0a16862342f176b769 100644 (file)
--- a/apt-pkg/deb/dpkgpm.cc
+++ b/apt-pkg/deb/dpkgpm.cc
@@ -45,8 +45,8 @@ 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)
 {
 }
                                                                        /*}}}*/
@@ -335,7 +335,6 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf)
 
    return true;
 }
-
                                                                        /*}}}*/
 // DPkgPM::DoStdin - Read stdin and pass to slave pty                  /*{{{*/
 // ---------------------------------------------------------------------
@@ -343,9 +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         /*{{{*/
@@ -355,10 +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)
@@ -538,6 +548,27 @@ bool pkgDPkgPM::CloseLog()
    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                                       /*{{{*/
 // ---------------------------------------------------------------------
@@ -613,6 +644,8 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       }
    }   
 
+   stdin_is_dev_null = false;
+
    // create log
    OpenLog();
 
@@ -796,7 +829,7 @@ 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);
@@ -819,7 +852,12 @@ 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) {
@@ -834,16 +872,20 @@ bool pkgDPkgPM::Go(int OutStatusFd)
            signal(SIGINT,old_SIGINT);
            return _error->Errno("waitpid","Couldn't wait for subprocess");
         }
-
         // 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);
+        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)
@@ -867,8 +909,11 @@ 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)
@@ -938,9 +983,9 @@ void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg)
    if (Pkg.end() == true)
       return;
    pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg);
-   pkgver = Ver.VerStr();
    if (Ver.end() == true)
       return;
+   pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();
    pkgRecords Recs(Cache);
    pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList());
    srcpkgname = Parse.SourcePkg();