Of course, I shouldn't have used lseek() to find out the file's
position in new_buffersize(); the correct function to use is ftell().
Thanks to Ben Jackson.
diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index 5502f15..f8c58ba 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -406,17 +406,14 @@
size_t currentsize;
{
#ifdef HAVE_FSTAT
-#ifndef SEEK_CUR
-#define SEEK_CUR 1
-#endif
long pos, end;
struct stat st;
if (fstat(fileno(f->f_fp), &st) == 0) {
end = st.st_size;
- pos = lseek(fileno(f->f_fp), 0L, SEEK_CUR);
+ pos = ftell(f->f_fp);
if (end > pos && pos >= 0)
- return end - pos + BUFSIZ;
- /* Add BUFSIZ to allow for stdio buffered data */
+ return end - pos + 1;
+ /* Add 1 so if the file were to grow we'd notice. */
}
#endif
if (currentsize > SMALLCHUNK) {