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| author | Ed Maste <emaste@FreeBSD.org> | 2023-11-07 14:16:13 +0000 |
|---|---|---|
| committer | Ed Maste <emaste@FreeBSD.org> | 2023-11-07 18:41:55 +0000 |
| commit | 0b7939d725ba0ca903c5f8a3ca6d74347eb88690 (patch) | |
| tree | 8fa89361d69837ac1357dd8a8c3bcb255610a46b | |
| parent | 59ec3ffdd7ce85f32ea833e8024f7bacd36d4e97 (diff) | |
| download | src-0b7939d725ba0ca903c5f8a3ca6d74347eb88690.tar.gz src-0b7939d725ba0ca903c5f8a3ca6d74347eb88690.zip | |
fflush: correct buffer handling in __sflush
Two additional stdio changes followed 86a16ada1ea6 and need to be
reverted as part of the fflush fix.
This reverts commit 6e13794fbe6e82c21365d0fd66769bf8b19c0197.
This reverts commit bafaa70b6f9098d83d074968c8e6747ecec1e118.
Fixes: d09a3bf72c0b ("fflush: correct buffer handling in __sflush")
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D42491
(cherry picked from commit 4e0e01bf6511c28212d7dff94fe131a502e13026)
(cherry picked from commit d2c65a1c948648f11342274029a3f18b90aa58d2)
Approved by: so
| -rw-r--r-- | lib/libc/stdio/fvwrite.c | 13 | ||||
| -rw-r--r-- | lib/libc/stdio/wbuf.c | 12 |
2 files changed, 4 insertions, 21 deletions
diff --git a/lib/libc/stdio/fvwrite.c b/lib/libc/stdio/fvwrite.c index dd170ee3d7dc..acf8f72076cf 100644 --- a/lib/libc/stdio/fvwrite.c +++ b/lib/libc/stdio/fvwrite.c @@ -52,7 +52,6 @@ int __sfvwrite(FILE *fp, struct __suio *uio) { size_t len; - unsigned char *old_p; char *p; struct __siov *iov; int w, s; @@ -136,12 +135,8 @@ __sfvwrite(FILE *fp, struct __suio *uio) COPY(w); /* fp->_w -= w; */ /* unneeded */ fp->_p += w; - old_p = fp->_p; - if (__fflush(fp) == EOF) { - if (old_p == fp->_p) - fp->_p -= w; + if (__fflush(fp)) goto err; - } } else if (len >= (w = fp->_bf._size)) { /* write directly */ w = _swrite(fp, p, w); @@ -180,12 +175,8 @@ __sfvwrite(FILE *fp, struct __suio *uio) COPY(w); /* fp->_w -= w; */ fp->_p += w; - old_p = fp->_p; - if (__fflush(fp) == EOF) { - if (old_p == fp->_p) - fp->_p -= w; + if (__fflush(fp)) goto err; - } } else if (s >= (w = fp->_bf._size)) { w = _swrite(fp, p, w); if (w <= 0) diff --git a/lib/libc/stdio/wbuf.c b/lib/libc/stdio/wbuf.c index 808cfa588cfb..558322b4001e 100644 --- a/lib/libc/stdio/wbuf.c +++ b/lib/libc/stdio/wbuf.c @@ -50,7 +50,6 @@ static char sccsid[] = "@(#)wbuf.c 8.1 (Berkeley) 6/4/93"; int __swbuf(int c, FILE *fp) { - unsigned char *old_p; int n; /* @@ -86,15 +85,8 @@ __swbuf(int c, FILE *fp) } fp->_w--; *fp->_p++ = c; - old_p = fp->_p; - if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n')) { - if (__fflush(fp) != 0) { - if (fp->_p == old_p) { - fp->_p--; - fp->_w++; - } + if (++n == fp->_bf._size || (fp->_flags & __SLBF && c == '\n')) + if (__fflush(fp) != 0) return (EOF); - } - } return (c); } |