1  /* Copyright (C) 2000-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <unistd.h>
      20  #include <stdlib.h>
      21  #include <string.h>
      22  
      23  #include "spawn_int.h"
      24  
      25  /* Add an action to FILE-ACTIONS which tells the implementation to call
      26     `open' for the given file during the `spawn' call.  */
      27  int
      28  __posix_spawn_file_actions_addopen (posix_spawn_file_actions_t *file_actions,
      29  				    int fd, const char *path, int oflag,
      30  				    mode_t mode)
      31  {
      32    struct __spawn_action *rec;
      33  
      34    if (!__spawn_valid_fd (fd))
      35      return EBADF;
      36  
      37    char *path_copy = __strdup (path);
      38    if (path_copy == NULL)
      39      return ENOMEM;
      40  
      41    /* Allocate more memory if needed.  */
      42    if (file_actions->__used == file_actions->__allocated
      43        && __posix_spawn_file_actions_realloc (file_actions) != 0)
      44      {
      45        /* This can only mean we ran out of memory.  */
      46        free (path_copy);
      47        return ENOMEM;
      48      }
      49  
      50    /* Add the new value.  */
      51    rec = &file_actions->__actions[file_actions->__used];
      52    rec->tag = spawn_do_open;
      53    rec->action.open_action.fd = fd;
      54    rec->action.open_action.path = path_copy;
      55    rec->action.open_action.oflag = oflag;
      56    rec->action.open_action.mode = mode;
      57  
      58    /* Account for the new entry.  */
      59    ++file_actions->__used;
      60  
      61    return 0;
      62  }
      63  weak_alias (__posix_spawn_file_actions_addopen,
      64  	    posix_spawn_file_actions_addopen)