dup-safer.c revision 05436638acc7c010349a69c3395f1a57c642dc62
1cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project/* Invoke dup, but avoid some glitches. 2cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 305436638acc7c010349a69c3395f1a57c642dc62Ying Wang Copyright (C) 2001, 2004-2006, 2009-2012 Free Software Foundation, Inc. 405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 505436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is free software: you can redistribute it and/or modify 6cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project it under the terms of the GNU General Public License as published by 705436638acc7c010349a69c3395f1a57c642dc62Ying Wang the Free Software Foundation; either version 3 of the License, or 805436638acc7c010349a69c3395f1a57c642dc62Ying Wang (at your option) any later version. 9cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 10cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project This program is distributed in the hope that it will be useful, 11cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project but WITHOUT ANY WARRANTY; without even the implied warranty of 12cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project GNU General Public License for more details. 14cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 15cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project You should have received a copy of the GNU General Public License 1605436638acc7c010349a69c3395f1a57c642dc62Ying Wang along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 18cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project/* Written by Paul Eggert. */ 19cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 2005436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <config.h> 21cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 22cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project#include "unistd-safer.h" 23cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 24cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project#include <fcntl.h> 25cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project#include <unistd.h> 26cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 27cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project/* Like dup, but do not return STDIN_FILENO, STDOUT_FILENO, or 28cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project STDERR_FILENO. */ 29cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project 30cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectint 31cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Projectdup_safer (int fd) 32cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project{ 33cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project return fcntl (fd, F_DUPFD, STDERR_FILENO + 1); 34cea198a11f15a2eb071d98491ca9a8bc8cebfbc4The Android Open Source Project} 35