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Diffstat (limited to 'newlib/libc/stdio64/freopen64.c')
| -rw-r--r-- | newlib/libc/stdio64/freopen64.c | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/newlib/libc/stdio64/freopen64.c b/newlib/libc/stdio64/freopen64.c deleted file mode 100644 index 866d8c943..000000000 --- a/newlib/libc/stdio64/freopen64.c +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Copyright (c) 1990 The Regents of the University of California. - * All rights reserved. - * - * Redistribution and use in source and binary forms are permitted - * provided that the above copyright notice and this paragraph are - * duplicated in all such forms and that any documentation, - * advertising materials, and other materials related to such - * distribution and use acknowledge that the software was developed - * by the University of California, Berkeley. The name of the - * University may not be used to endorse or promote products derived - * from this software without specific prior written permission. - * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. - */ - -/* -FUNCTION -<<freopen64>>---open a large file using an existing file descriptor - -INDEX - freopen64 -INDEX - _freopen64_r - -ANSI_SYNOPSIS - #include <stdio.h> - FILE *freopen64(const char *<[file]>, const char *<[mode]>, - FILE *<[fp]>); - FILE *_freopen64_r(struct _reent *<[ptr]>, const char *<[file]>, - const char *<[mode]>, FILE *<[fp]>); - -TRAD_SYNOPSIS - #include <stdio.h> - FILE *freopen64(<[file]>, <[mode]>, <[fp]>) - char *<[file]>; - char *<[mode]>; - FILE *<[fp]>; - - FILE *_freopen64_r(<[ptr]>, <[file]>, <[mode]>, <[fp]>) - struct _reent *<[ptr]>; - char *<[file]>; - char *<[mode]>; - FILE *<[fp]>; - -DESCRIPTION -Use this variant of <<fopen64>> if you wish to specify a particular file -descriptor <[fp]> (notably <<stdin>>, <<stdout>>, or <<stderr>>) for -the file. - -If <[fp]> was associated with another file or stream, <<freopen64>> -closes that other file or stream (but ignores any errors while closing -it). - -<[file]> and <[mode]> are used just as in <<fopen>>. - -If <[file]> is <<NULL>>, the underlying stream is modified rather than -closed. The file cannot be given a more permissive access mode (for -example, a <[mode]> of "w" will fail on a read-only file descriptor), -but can change status such as append or binary mode. If modification -is not possible, failure occurs. - -RETURNS -If successful, the result is the same as the argument <[fp]>. If the -file cannot be opened as specified, the result is <<NULL>>. - -PORTABILITY -<<freopen>> is a glibc extension. - -Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, -<<lseek64>>, <<open64>>, <<read>>, <<sbrk>>, <<write>>. -*/ - -#include <time.h> -#include <stdio.h> -#include <errno.h> -#include <fcntl.h> -#include <stdlib.h> -#include <sys/lock.h> -#include "local.h" - -/* - * Re-direct an existing, open (probably) file to some other file. - */ - -#ifdef __LARGE64_FILES - -FILE * -_DEFUN (_freopen64_r, (ptr, file, mode, fp), - struct _reent *ptr _AND - _CONST char *file _AND - _CONST char *mode _AND - register FILE *fp) -{ - register int f; - int flags, oflags; - int e = 0; - - __sfp_lock_acquire (); - - CHECK_INIT (ptr, fp); - - _flockfile(fp); - - if ((flags = __sflags (ptr, mode, &oflags)) == 0) - { - _funlockfile(fp); - _fclose_r (ptr, fp); - __sfp_lock_release (); - return NULL; - } - - /* - * Remember whether the stream was open to begin with, and - * which file descriptor (if any) was associated with it. - * If it was attached to a descriptor, defer closing it, - * so that, e.g., freopen("/dev/stdin", "r", stdin) works. - * This is unnecessary if it was not a Unix file. - */ - - if (fp->_flags == 0) - fp->_flags = __SEOF; /* hold on to it */ - else - { - if (fp->_flags & __SWR) - _fflush_r (ptr, fp); - /* - * If close is NULL, closing is a no-op, hence pointless. - * If file is NULL, the file should not be closed. - */ - if (fp->_close != NULL && file != NULL) - fp->_close (ptr, fp->_cookie); - } - - /* - * Now get a new descriptor to refer to the new file, or reuse the - * existing file descriptor if file is NULL. - */ - - if (file != NULL) - { - f = _open64_r (ptr, (char *) file, oflags, 0666); - e = ptr->_errno; - } - else - { -#ifdef HAVE_FCNTL - int oldflags; - /* - * Reuse the file descriptor, but only if the new access mode is - * equal or less permissive than the old. F_SETFL correctly - * ignores creation flags. - */ - f = fp->_file; - if ((oldflags = _fcntl_r (ptr, f, F_GETFL, 0)) == -1 - || ! ((oldflags & O_ACCMODE) == O_RDWR - || ((oldflags ^ oflags) & O_ACCMODE) == 0) - || _fcntl_r (ptr, f, F_SETFL, oflags) == -1) - f = -1; -#else - /* We cannot modify without fcntl support. */ - f = -1; -#endif - -#ifdef __SCLE - /* - * F_SETFL doesn't change textmode. Don't mess with modes of ttys. - */ - if (0 <= f && ! isatty (f) - && setmode (f, oflags & (O_BINARY | O_TEXT)) == -1) - f = -1; -#endif - - if (f < 0) - { - e = EBADF; - if (fp->_close != NULL) - fp->_close (ptr, fp->_cookie); - } - } - - /* - * Finish closing fp. Even if the open succeeded above, - * we cannot keep fp->_base: it may be the wrong size. - * This loses the effect of any setbuffer calls, - * but stdio has always done this before. - */ - - if (fp->_flags & __SMBF) - _free_r (ptr, (char *) fp->_bf._base); - fp->_w = 0; - fp->_r = 0; - fp->_p = NULL; - fp->_bf._base = NULL; - fp->_bf._size = 0; - fp->_lbfsize = 0; - if (HASUB (fp)) - FREEUB (ptr, fp); - fp->_ub._size = 0; - if (HASLB (fp)) - FREELB (ptr, fp); - fp->_lb._size = 0; - - if (f < 0) - { /* did not get it after all */ - fp->_flags = 0; /* set it free */ - ptr->_errno = e; /* restore in case _close clobbered */ - _funlockfile(fp); -#ifndef __SINGLE_THREAD__ - __lock_close_recursive (fp->_lock); -#endif - __sfp_lock_release (); - return NULL; - } - - fp->_flags = flags; - fp->_file = f; - fp->_cookie = (_PTR) fp; - fp->_read = __sread; - fp->_write = __swrite64; - fp->_seek = __sseek; - fp->_seek64 = __sseek64; - fp->_close = __sclose; - -#ifdef __SCLE - if (__stextmode(fp->_file)) - fp->_flags |= __SCLE; -#endif - - fp->_flags |= __SL64; - - _funlockfile(fp); - __sfp_lock_release (); - return fp; -} - -#ifndef _REENT_ONLY - -FILE * -_DEFUN (freopen64, (file, mode, fp), - _CONST char *file _AND - _CONST char *mode _AND - register FILE *fp) -{ - return _freopen64_r (_REENT, file, mode, fp); -} - -#endif /* !_REENT_ONLY */ - -#endif /* __LARGE64_FILES */ |