diff options
Diffstat (limited to 'newlib/libc/stdio/freopen.c')
| -rw-r--r-- | newlib/libc/stdio/freopen.c | 65 |
1 files changed, 7 insertions, 58 deletions
diff --git a/newlib/libc/stdio/freopen.c b/newlib/libc/stdio/freopen.c index ae3444b1b..995100b27 100644 --- a/newlib/libc/stdio/freopen.c +++ b/newlib/libc/stdio/freopen.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 1990, 2006 The Regents of the University of California. + * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted @@ -55,12 +55,6 @@ 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>>. @@ -76,7 +70,6 @@ Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>, #include <reent.h> #include <time.h> #include <stdio.h> -#include <errno.h> #include <fcntl.h> #include <stdlib.h> #include <sys/lock.h> @@ -94,8 +87,7 @@ _DEFUN(_freopen_r, (ptr, file, mode, fp), register FILE *fp) { register int f; - int flags, oflags; - int e = 0; + int flags, oflags, e; __sfp_lock_acquire (); @@ -125,60 +117,17 @@ _DEFUN(_freopen_r, (ptr, file, mode, fp), { if (fp->_flags & __SWR) _CAST_VOID fflush (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) + /* if close is NULL, closing is a no-op, hence pointless */ + if (fp->_close != NULL) _CAST_VOID (*fp->_close) (fp->_cookie); } /* - * Now get a new descriptor to refer to the new file, or reuse the - * existing file descriptor if file is NULL. + * Now get a new descriptor to refer to the new file. */ - if (file != NULL) - { - f = _open_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, flags & (O_BINARY | O_TEXT)) == -1) - f = -1; -#endif - - if (f < 0) - { - e = EBADF; - if (fp->_close != NULL) - _CAST_VOID (*fp->_close) (fp->_cookie); - } - } + f = _open_r (ptr, (char *) file, oflags, 0666); + e = ptr->_errno; /* * Finish closing fp. Even if the open succeeded above, |