kc3-lang/gnulib/lib/dup2.c

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• Hash : 57fdfd3f
  Author :
  Date : 2007-10-07T19:14:58
  

  Change copyright notice from GPLv2+ to GPLv3+.
  

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• lib/dup2.c

• /* Duplicate an open file descriptor to a specified file descriptor.
  
     Copyright (C) 1999, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  /* written by Paul Eggert */
  
  #include <config.h>
  
  /* Specification.  */
  #include <unistd.h>
  
  #include <errno.h>
  #include <fcntl.h>
  
  #ifndef F_DUPFD
  static int
  dupfd (int fd, int desired_fd)
  {
    int duplicated_fd = dup (fd);
    if (duplicated_fd < 0 || duplicated_fd == desired_fd)
      return duplicated_fd;
    else
      {
        int r = dupfd (fd, desired_fd);
        int e = errno;
        close (duplicated_fd);
        errno = e;
        return r;
      }
  }
  #endif
  
  int
  dup2 (int fd, int desired_fd)
  {
    if (fd == desired_fd)
      return fd;
    close (desired_fd);
  #ifdef F_DUPFD
    return fcntl (fd, F_DUPFD, desired_fd);
  #else
    return dupfd (fd, desired_fd);
  #endif
  }
  

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