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| author | Corinna Vinschen <corinna@vinschen.de> | 2014-01-17 10:55:32 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2014-01-17 10:55:32 +0000 |
| commit | 7a7e4d4d95e878c62ea5b642da864018b50aae21 (patch) | |
| tree | 7256f4412958add20549f7c053e54b6df1f152cb /newlib/libc/stdio/fclose.c | |
| parent | ae5b40a65bfc48f599a94dbfedb87f88ba6e831e (diff) | |
| download | cygnal-7a7e4d4d95e878c62ea5b642da864018b50aae21.tar.gz cygnal-7a7e4d4d95e878c62ea5b642da864018b50aae21.tar.bz2 cygnal-7a7e4d4d95e878c62ea5b642da864018b50aae21.zip | |
Introduce _STDIO_BSD_SEMANTICS flag to switch fclose/exit file flushing
semantics from POSIX to BSD.
* libc/stdio/fclose.c (_fclose_r): Conditionalize file flushing on
_STDIO_BSD_SEMANTICS. Call __sflush_r rather than _fflush_r. Add
comment.
* libc/stdio/fflush.c (__sflushw_r): New function, only available
if _STDIO_BSD_SEMANTICS is defined.
* libc/stdio/findfp.c (_cleanup_r): Call _fwalk_reent rather than
_fwalk. Conditionalize cleanup function call on _STDIO_BSD_SEMANTICS.
Add comments. Add FIXME.
* libc/stdio/local.h (__sflushw_r): Declare if _STDIO_BSD_SEMANTICS is
defined.
Diffstat (limited to 'newlib/libc/stdio/fclose.c')
| -rw-r--r-- | newlib/libc/stdio/fclose.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/newlib/libc/stdio/fclose.c b/newlib/libc/stdio/fclose.c index fd054feaa..cd271c490 100644 --- a/newlib/libc/stdio/fclose.c +++ b/newlib/libc/stdio/fclose.c @@ -92,10 +92,15 @@ _DEFUN(_fclose_r, (rptr, fp), #endif return (0); } - /* Unconditionally flush to allow special handling for seekable read - files to reposition file to last byte processed as opposed to - last byte read ahead into the buffer. */ - r = _fflush_r (rptr, fp); +#ifdef _STDIO_BSD_SEMANTICS + /* BSD and Glibc systems only flush streams which have been written to. */ + r = (fp->_flags & __SWR) ? __sflush_r (rptr, fp) : 0; +#else + /* Follow POSIX semantics exactly. Unconditionally flush to allow + special handling for seekable read files to reposition file to last + byte processed as opposed to last byte read ahead into the buffer. */ + r = __sflush_r (rptr, fp); +#endif if (fp->_close != NULL && fp->_close (rptr, fp->_cookie) < 0) r = EOF; if (fp->_flags & __SMBF) |