Add routine to close file descriptors on exec

base/process_util_linux.cc

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process_util.h"
 
 #include <ctype.h>
 #include <dirent.h>
 #include <fcntl.h>
 #include <unistd.h>
@@ skipping 26 matching lines @@
 
   char* argv_copy[argv.size() + 1];
   for (size_t i = 0; i < argv.size(); i++) {
     argv_copy[i] = new char[argv[i].size() + 1];
     strcpy(argv_copy[i], argv[i].c_str());
   }
   argv_copy[argv.size()] = NULL;
 
   // Make sure we don't leak any FDs to the child process by marking all FDs
   // as close-on-exec.
-  int max_files = GetMaxFilesOpenInProcess();
-  for (int i = STDERR_FILENO + 1; i < max_files; i++) {
-    int flags = fcntl(i, F_GETFD);
-    if (flags != -1) {
-      fcntl(i, F_SETFD, flags | FD_CLOEXEC);
-    }
-  }
+  SetAllFDsToCloseOnExec();
 
   int pid = fork();
   if (pid == 0) {
     for (file_handle_mapping_vector::const_iterator it = fds_to_remap.begin();
          it != fds_to_remap.end();
          ++it) {
       int src_fd = it->first;
       int dest_fd = it->second;
       if (src_fd == dest_fd) {
         int flags = fcntl(src_fd, F_GETFD);
@@ skipping 231 matching lines @@
           (*io_counters).WriteTransferCount = StringToInt64(tokenizer.token());
         }
         state = KEY_NAME;
         break;
     }
   }
   return true;
 }
 
 }  // namespace base