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Fix ftell bug after ungetc.

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* libc/stdio/ftell.c (_ftell_r): Don't flush ungetc buffer on
ftell.
* libc/stdio64/ftello64.c (_ftello64_r): Likewise.
* libc/stdio/fflush.c (_fflush_r): Clear unget buffer when
repositioning underlying fd offset.
-------------------------------------------------------------------
This commit is contained in:
Eric Blake
2008-03-04 02:22:36 +00:00
parent be62101c60
commit 9ae00e9e07
4 changed files with 23 additions and 6 deletions
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9
newlib/libc/stdio64/ftello64.c
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@ -108,9 +108,12 @@ _DEFUN (_ftello64_r, (ptr, fp),
return -1L;
}
/* Find offset of underlying I/O object, then
adjust for buffered bytes. */
_fflush_r (ptr, fp); /* may adjust seek offset on append stream */
/* Find offset of underlying I/O object, then adjust for buffered
bytes. Flush a write stream, since the offset may be altered if
the stream is appending. Do not flush a read stream, since we
must not lose the ungetc buffer. */
if (fp->_flags & __SWR)
_fflush_r (ptr, fp);
if (fp->_flags & __SOFF)
pos = fp->_offset;
else