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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /libio/freopen.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'libio/freopen.c')
-rw-r--r-- | libio/freopen.c | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/libio/freopen.c b/libio/freopen.c deleted file mode 100644 index 980523af48..0000000000 --- a/libio/freopen.c +++ /dev/null @@ -1,109 +0,0 @@ -/* Copyright (C) 1993-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. - - As a special exception, if you link the code in this file with - files compiled with a GNU compiler to produce an executable, - that does not cause the resulting executable to be covered by - the GNU Lesser General Public License. This exception does not - however invalidate any other reasons why the executable file - might be covered by the GNU Lesser General Public License. - This exception applies to code released by its copyright holders - in files containing the exception. */ - -#include "libioP.h" -#include "stdio.h" -#include <fcntl.h> -#include <stdlib.h> -#include <unistd.h> - -#include <shlib-compat.h> -#include <fd_to_filename.h> - -#include <kernel-features.h> - -FILE * -freopen (const char *filename, const char *mode, FILE *fp) -{ - FILE *result; - CHECK_FILE (fp, NULL); - if (!(fp->_flags & _IO_IS_FILEBUF)) - return NULL; - _IO_acquire_lock (fp); - int fd = _IO_fileno (fp); - const char *gfilename = (filename == NULL && fd >= 0 - ? fd_to_filename (fd) : filename); - fp->_flags2 |= _IO_FLAGS2_NOCLOSE; -#if SHLIB_COMPAT (libc, GLIBC_2_0, GLIBC_2_1) - if (&_IO_stdin_used == NULL) - { - /* If the shared C library is used by the application binary which - was linked against the older version of libio, we just use the - older one even for internal use to avoid trouble since a pointer - to the old libio may be passed into shared C library and wind - up here. */ - _IO_old_file_close_it (fp); - _IO_JUMPS_FILE_plus (fp) = &_IO_old_file_jumps; - result = _IO_old_file_fopen (fp, gfilename, mode); - } - else -#endif - { - _IO_file_close_it (fp); - _IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps; - if (_IO_vtable_offset (fp) == 0 && fp->_wide_data != NULL) - fp->_wide_data->_wide_vtable = &_IO_wfile_jumps; - result = _IO_file_fopen (fp, gfilename, mode, 1); - if (result != NULL) - result = __fopen_maybe_mmap (result); - } - fp->_flags2 &= ~_IO_FLAGS2_NOCLOSE; - if (result != NULL) - { - /* unbound stream orientation */ - result->_mode = 0; - - if (fd != -1 && _IO_fileno (result) != fd) - { - /* At this point we have both file descriptors already allocated, - so __dup3 will not fail with EBADF, EINVAL, or EMFILE. But - we still need to check for EINVAL and, due Linux internal - implementation, EBUSY. It is because on how it internally opens - the file by splitting the buffer allocation operation and VFS - opening (a dup operation may run when a file is still pending - 'install' on VFS). */ - if (__dup3 (_IO_fileno (result), fd, - (result->_flags2 & _IO_FLAGS2_CLOEXEC) != 0 - ? O_CLOEXEC : 0) == -1) - { - _IO_file_close_it (result); - result = NULL; - goto end; - } - __close (_IO_fileno (result)); - _IO_fileno (result) = fd; - } - } - else if (fd != -1) - __close (fd); - -end: - if (filename == NULL) - free ((char *) gfilename); - - _IO_release_lock (fp); - return result; -} |