* apt-pkg/acquire-worker.cc:

  - check return of write() as gcc recommends
* apt-pkg/acquire.cc:
  - check return of write() as gcc recommends
* apt-pkg/cdrom.cc:
  - check return of chdir() and link() as gcc recommends
* apt-pkg/clean.cc:
  - check return of chdir() as gcc recommends
* apt-pkg/contrib/netrc.cc:
  - check return of asprintf() as gcc recommends

5 files changed, 46 insertions, 10 deletions

diff --git a/apt-pkg/acquire-worker.cc b/apt-pkg/acquire-worker.cc
index 3bb977e14..d79b2b16d 100644
--- a/apt-pkg/acquire-worker.cc
+++ b/apt-pkg/acquire-worker.cc
@@ -431,7 +431,23 @@ bool pkgAcquire::Worker::MediaChange(string Message)
 	     << Drive  << ":"     // drive
 	     << msg.str()         // l10n message
 	     << endl;
-      write(status_fd, status.str().c_str(), status.str().size());
+
+      std::string const dlstatus = status.str();
+      size_t done = 0;
+      size_t todo = dlstatus.size();
+      errno = 0;
+      int res = 0;
+      do
+      {
+	 res = write(status_fd, dlstatus.c_str() + done, todo);
+	 if (res < 0 && errno == EINTR)
+	    continue;
+	 if (res < 0)
+	    break;
+	 done += res;
+	 todo -= res;
+      }
+      while (res > 0 && todo > 0);
    }
 
    if (Log == 0 || Log->MediaChange(LookupTag(Message,"Media"),
diff --git a/apt-pkg/acquire.cc b/apt-pkg/acquire.cc
index 573a85c2f..19bcca8a1 100644
--- a/apt-pkg/acquire.cc
+++ b/apt-pkg/acquire.cc
@@ -872,7 +872,23 @@ bool pkgAcquireStatus::Pulse(pkgAcquire *Owner)
 	     << ":"  << (CurrentBytes/float(TotalBytes)*100.0) 
 	     << ":" << msg 
 	     << endl;
-      write(fd, status.str().c_str(), status.str().size());
+
+      std::string const dlstatus = status.str();
+      size_t done = 0;
+      size_t todo = dlstatus.size();
+      errno = 0;
+      int res = 0;
+      do
+      {
+	 res = write(fd, dlstatus.c_str() + done, todo);
+	 if (res < 0 && errno == EINTR)
+	    continue;
+	 if (res < 0)
+	    break;
+	 done += res;
+	 todo -= res;
+      }
+      while (res > 0 && todo > 0);
    }
 
    return true;
diff --git a/apt-pkg/cdrom.cc b/apt-pkg/cdrom.cc
index 4462d4e24..50c204371 100644
--- a/apt-pkg/cdrom.cc
+++ b/apt-pkg/cdrom.cc
@@ -430,7 +430,8 @@ bool pkgCdrom::WriteDatabase(Configuration &Cnf)
 
    Out.close();
    
-   link(DFile.c_str(),string(DFile + '~').c_str());
+   if (FileExists(DFile) == true && link(DFile.c_str(),string(DFile + '~').c_str()) != 0)
+      return _error->Errno("link", "Failed to link %s to %s~", DFile.c_str(), DFile.c_str());
    if (rename(NewFile.c_str(),DFile.c_str()) != 0)
       return _error->Errno("rename","Failed to rename %s.new to %s",
 			   DFile.c_str(),DFile.c_str());
@@ -697,7 +698,8 @@ bool pkgCdrom::Add(pkgCdromStatus *log)					/*{{{*/
       return false;
    }
 
-   chdir(StartDir.c_str());
+   if (chdir(StartDir.c_str()) != 0)
+      return _error->Errno("chdir","Unable to change to %s", StartDir.c_str());
 
    if (_config->FindB("Debug::aptcdrom",false) == true)
    {
diff --git a/apt-pkg/clean.cc b/apt-pkg/clean.cc
index ed8fa1aa9..9c167eaa5 100644
--- a/apt-pkg/clean.cc
+++ b/apt-pkg/clean.cc
@@ -54,9 +54,11 @@ bool pkgArchiveCleaner::Go(std::string Dir,pkgCache &Cache)
       struct stat St;
       if (stat(Dir->d_name,&St) != 0)
       {
-	 chdir(StartDir.c_str());
+	 _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
 	 closedir(D);
-	 return _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
+	 if (chdir(StartDir.c_str()) != 0)
+	    return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
+	 return false;
       }
       
       // Grab the package name
@@ -115,8 +117,9 @@ bool pkgArchiveCleaner::Go(std::string Dir,pkgCache &Cache)
       Erase(Dir->d_name,Pkg,Ver,St);
    };
    
-   chdir(StartDir.c_str());
    closedir(D);
-   return true;   
+   if (chdir(StartDir.c_str()) != 0)
+      return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
+   return true;
 }
 									/*}}}*/
diff --git a/apt-pkg/contrib/netrc.cc b/apt-pkg/contrib/netrc.cc
index cb7d36088..56e59d84b 100644
--- a/apt-pkg/contrib/netrc.cc
+++ b/apt-pkg/contrib/netrc.cc
@@ -68,8 +68,7 @@ int parsenetrc (char *host, char *login, char *password, char *netrcfile = NULL)
     if (!home)
       return -1;
 
-    asprintf (&netrcfile, "%s%s%s", home, DIR_CHAR, NETRC);
-    if(!netrcfile)
+    if (asprintf (&netrcfile, "%s%s%s", home, DIR_CHAR, NETRC) == -1 || netrcfile == NULL)
       return -1;
     else
       netrc_alloc = true;