musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2012年06月17日 21:24:58 -0400
committer	Rich Felker <dalias@aerifal.cx>	2012年06月17日 21:24:58 -0400
commit	deb90c79e5c498fbb48de1423df034447f330e38 (patch)
tree	7320e1105670316cc579731ba4002c50803c6bfb /src/stdio/ext.c
parent	3b43d10fafd64ac0a93fab463330a936b90ec15c (diff)
download	musl-deb90c79e5c498fbb48de1423df034447f330e38.tar.gz

change stdio_ext __freading/__fwriting semantics slightly

the old behavior was to only consider a stream to be "reading" or "writing" if it had buffered, unread/unwritten data. this reportedly differs from the traditional behavior of these functions, which is essentially to return true as much as possible without creating the possibility that both __freading and __fwriting could return true. gnulib expects __fwriting to return true as soon as a file is opened write-only, and possibly expects other cases that depend on the traditional behavior. and since these functions exist mostly for gnulib (does anything else use them??), they should match the expected behavior to avoid even more ugly hacks and workarounds...

Diffstat (limited to 'src/stdio/ext.c')

-rw-r--r--

src/stdio/ext.c

1 files changed, 2 insertions, 2 deletions

diff --git a/src/stdio/ext.c b/src/stdio/ext.c
index 6b8ce91c..1fd95490 100644
--- a/src/stdio/ext.c
+++ b/src/stdio/ext.c

@@ -14,12 +14,12 @@ int __fsetlocking(FILE *f, int type)

int __fwriting(FILE *f)

{

- return f->wend && f->wpos > f->wbase;

+ return (f->flags & F_NORD) || f->wend;

}

int __freading(FILE *f)

{

- return f->rend > f->rpos;

+ return (f->flags & F_NOWR) || f->rend;

}

int __freadable(FILE *f)

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