diff options
Diffstat (limited to 'libio/iofdopen.c')
| -rw-r--r-- | libio/iofdopen.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/libio/iofdopen.c b/libio/iofdopen.c deleted file mode 100644 index 2a1df4680a..0000000000 --- a/libio/iofdopen.c +++ /dev/null @@ -1,187 +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 <stdlib.h> -#include "libioP.h" -#include <fcntl.h> - -#ifdef _LIBC -# include <shlib-compat.h> -#endif - -#ifndef _IO_fcntl -#ifdef _LIBC -#define _IO_fcntl __fcntl -#else -#define _IO_fcntl fcntl -#endif -#endif - -_IO_FILE * -_IO_new_fdopen (int fd, const char *mode) -{ - int read_write; - struct locked_FILE - { - struct _IO_FILE_plus fp; -#ifdef _IO_MTSAFE_IO - _IO_lock_t lock; -#endif - struct _IO_wide_data wd; - } *new_f; - int i; - int use_mmap = 0; - - /* Decide whether we modify the offset of the file we attach to and seek to - the end of file. We only do this if the mode is 'a' and if the file - descriptor did not have O_APPEND in its flags already. */ - bool do_seek = false; - - switch (*mode) - { - case 'r': - read_write = _IO_NO_WRITES; - break; - case 'w': - read_write = _IO_NO_READS; - break; - case 'a': - read_write = _IO_NO_READS|_IO_IS_APPENDING; - break; - default: - MAYBE_SET_EINVAL; - return NULL; - } - for (i = 1; i < 5; ++i) - { - switch (*++mode) - { - case '\0': - break; - case '+': - read_write &= _IO_IS_APPENDING; - break; - case 'm': - use_mmap = 1; - continue; - case 'x': - case 'b': - default: - /* Ignore */ - continue; - } - break; - } -#ifdef F_GETFL - int fd_flags = _IO_fcntl (fd, F_GETFL); -#ifndef O_ACCMODE -#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR) -#endif - if (fd_flags == -1) - return NULL; - - if (((fd_flags & O_ACCMODE) == O_RDONLY && !(read_write & _IO_NO_WRITES)) - || ((fd_flags & O_ACCMODE) == O_WRONLY && !(read_write & _IO_NO_READS))) - { - MAYBE_SET_EINVAL; - return NULL; - } - - /* The May 93 draft of P1003.4/D14.1 (redesignated as 1003.1b) - [System Application Program Interface (API) Amendment 1: - Realtime Extensions], Rationale B.8.3.3 - Open a Stream on a File Descriptor says: - - Although not explicitly required by POSIX.1, a good - implementation of append ("a") mode would cause the - O_APPEND flag to be set. - - (Historical implementations [such as Solaris2] do a one-time - seek in fdopen.) - - However, we do not turn O_APPEND off if the mode is "w" (even - though that would seem consistent) because that would be more - likely to break historical programs. - */ - if ((read_write & _IO_IS_APPENDING) && !(fd_flags & O_APPEND)) - { - do_seek = true; -#ifdef F_SETFL - if (_IO_fcntl (fd, F_SETFL, fd_flags | O_APPEND) == -1) -#endif - return NULL; - } -#endif - - new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE)); - if (new_f == NULL) - return NULL; -#ifdef _IO_MTSAFE_IO - new_f->fp.file._lock = &new_f->lock; -#endif - _IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd, -#ifdef _G_HAVE_MMAP - (use_mmap && (read_write & _IO_NO_WRITES)) - ? &_IO_wfile_jumps_maybe_mmap : -#endif - &_IO_wfile_jumps); - _IO_JUMPS (&new_f->fp) = -#ifdef _G_HAVE_MMAP - (use_mmap && (read_write & _IO_NO_WRITES)) ? &_IO_file_jumps_maybe_mmap : -#endif - &_IO_file_jumps; - _IO_new_file_init_internal (&new_f->fp); -#if !_IO_UNIFIED_JUMPTABLES - new_f->fp.vtable = NULL; -#endif - /* We only need to record the fd because _IO_file_init_internal will - have unset the offset. It is important to unset the cached - offset because the real offset in the file could change between - now and when the handle is activated and we would then mislead - ftell into believing that we have a valid offset. */ - new_f->fp.file._fileno = fd; - new_f->fp.file._flags &= ~_IO_DELETE_DONT_CLOSE; - - _IO_mask_flags (&new_f->fp.file, read_write, - _IO_NO_READS+_IO_NO_WRITES+_IO_IS_APPENDING); - - /* For append mode, set the file offset to the end of the file if we added - O_APPEND to the file descriptor flags. Don't update the offset cache - though, since the file handle is not active. */ - if (do_seek && ((read_write & (_IO_IS_APPENDING | _IO_NO_READS)) - == (_IO_IS_APPENDING | _IO_NO_READS))) - { - _IO_off64_t new_pos = _IO_SYSSEEK (&new_f->fp.file, 0, _IO_seek_end); - if (new_pos == _IO_pos_BAD && errno != ESPIPE) - return NULL; - } - return &new_f->fp.file; -} -libc_hidden_ver (_IO_new_fdopen, _IO_fdopen) - -strong_alias (_IO_new_fdopen, __new_fdopen) -versioned_symbol (libc, _IO_new_fdopen, _IO_fdopen, GLIBC_2_1); -versioned_symbol (libc, __new_fdopen, fdopen, GLIBC_2_1); |