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Diffstat (limited to 'newlib/libc/stdio/freopen.c')
| -rw-r--r-- | newlib/libc/stdio/freopen.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/newlib/libc/stdio/freopen.c b/newlib/libc/stdio/freopen.c deleted file mode 100644 index 63f5833..0000000 --- a/newlib/libc/stdio/freopen.c +++ /dev/null @@ -1,157 +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 -<<freopen>>---open a file using an existing file descriptor - -INDEX - freopen - -ANSI_SYNOPSIS - #include <stdio.h> - FILE *freopen(const char *<[file]>, const char *<[mode]>, - FILE *<[fp]>); - -TRAD_SYNOPSIS - #include <stdio.h> - FILE *freopen(<[file]>, <[mode]>, <[fp]>) - char *<[file]>; - char *<[mode]>; - FILE *<[fp]>; - -DESCRIPTION -Use this variant of <<fopen>> 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, <<freopen>> -closes that other file or stream (but ignores any errors while closing -it). - -<[file]> and <[mode]> are used just as in <<fopen>>. - -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 -ANSI C requires <<freopen>>. - -Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, -<<lseek>>, <<open>>, <<read>>, <<sbrk>>, <<write>>. -*/ - -#include <time.h> -#include <stdio.h> -#include <fcntl.h> -#include <stdlib.h> -#include "local.h" - -/* - * Re-direct an existing, open (probably) file to some other file. - */ - -FILE * -_DEFUN (freopen, (file, mode, fp), - _CONST char *file _AND - _CONST char *mode _AND - register FILE *fp) -{ - register int f; - int flags, oflags, e; - struct _reent *ptr; - - CHECK_INIT (fp); - ptr = fp->_data; - - if ((flags = __sflags (ptr, mode, &oflags)) == 0) - { - (void) fclose (fp); - 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) - (void) fflush (fp); - /* if close is NULL, closing is a no-op, hence pointless */ - if (fp->_close != NULL) - (void) (*fp->_close) (fp->_cookie); - } - - /* - * Now get a new descriptor to refer to the new file. - */ - - f = _open_r (ptr, (char *) file, oflags, 0666); - e = ptr->_errno; - - /* - * 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 (fp); - fp->_ub._size = 0; - if (HASLB (fp)) - FREELB (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 */ - return NULL; - } - - fp->_flags = flags; - fp->_file = f; - fp->_cookie = (_PTR) fp; - fp->_read = __sread; - fp->_write = __swrite; - fp->_seek = __sseek; - fp->_close = __sclose; - -#ifdef __SCLE - if (__stextmode(fp->_file)) - fp->_flags |= __SCLE; -#endif - - return fp; -} |