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authorEric Blake <ebb9@byu.net>2009-04-30 13:18:49 -0600
committerEric Blake <ebb9@byu.net>2009-04-30 16:47:13 -0600
commit875cae47a975df4721d1c492c03799535f5cf2f6 (patch)
tree1c08c93b4a87c59fa3210004bfb060bf9d08f7f6 /lib
parent269bb7362f39fb9ecefd64a1b2ab70aee4d3ffed (diff)
downloadcoreutils-875cae47a975df4721d1c492c03799535f5cf2f6.tar.xz
stdopen: remove unused code
* m4/stdopen.m4: Delete now-unused file. * lib/stdopen.h: Likewise. * lib/stdopen.c: Likewise.
Diffstat (limited to 'lib')
-rw-r--r--lib/stdopen.c74
-rw-r--r--lib/stdopen.h16
2 files changed, 0 insertions, 90 deletions
diff --git a/lib/stdopen.c b/lib/stdopen.c
deleted file mode 100644
index e9b554485..000000000
--- a/lib/stdopen.c
+++ /dev/null
@@ -1,74 +0,0 @@
-/* stdopen.c - ensure that the three standard file descriptors are in use
-
- Copyright (C) 2005, 2006 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 and Jim Meyering. */
-
-#include <config.h>
-
-#include "stdopen.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <errno.h>
-
-/* Try to ensure that all of the standard file numbers (0, 1, 2)
- are in use. Without this, each application would have to guard
- every call to open, dup, fopen, etc. with tests to ensure they
- don't use one of the special file numbers when opening a file.
- Return false if at least one of the file descriptors is initially
- closed and an attempt to reopen it fails. Otherwise, return true. */
-bool
-stdopen (void)
-{
- int fd;
- bool ok = true;
-
- for (fd = 0; fd <= 2; fd++)
- {
- if (fcntl (fd, F_GETFD) < 0)
- {
- if (errno != EBADF)
- ok = false;
- else
- {
- static const int contrary_mode[]
- = { O_WRONLY, O_RDONLY, O_RDONLY };
- int mode = contrary_mode[fd];
- int new_fd;
- /* Open /dev/null with the contrary mode so that the typical
- read (stdin) or write (stdout, stderr) operation will fail.
- With descriptor 0, we can do even better on systems that
- have /dev/full, by opening that write-only instead of
- /dev/null. The only drawback is that a write-provoked
- failure comes with a misleading errno value, ENOSPC. */
- if (mode == O_RDONLY
- || (new_fd = open ("/dev/full", mode) != fd))
- new_fd = open ("/dev/null", mode);
- if (new_fd != fd)
- {
- if (0 <= new_fd)
- close (new_fd);
- ok = false;
- }
- }
- }
- }
-
- return ok;
-}
diff --git a/lib/stdopen.h b/lib/stdopen.h
deleted file mode 100644
index d54e5f135..000000000
--- a/lib/stdopen.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef STDOPEN_H
-# define STDOPEN_H 1
-
-# include <stdbool.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-bool stdopen (void);
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif