From: Guido van Rossum <guido@python.org>
Date: Thu, 21 Aug 1997 02:31:25 +0000 (+0000)
Subject: Use lseek instead of ftell; compensate by adding BUFSIZE
X-Git-Tag: v1.5a4~341
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=36f8e2d1dbaa9a1c4c4f4ecde78b4889225ca451;p=python

Use lseek instead of ftell; compensate by adding BUFSIZE
---

diff --git a/Objects/fileobject.c b/Objects/fileobject.c
index d47b1dbe96..a0d05c485b 100644
--- a/Objects/fileobject.c
+++ b/Objects/fileobject.c
@@ -406,13 +406,17 @@ new_buffersize(f, currentsize)
 	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 = ftell(f->f_fp);
+		pos = lseek(fileno(f->f_fp), 0L, SEEK_CUR);
 		if (end > pos && pos >= 0)
-			return end - pos + 1;
+			return end - pos + BUFSIZ;
+		/* Add BUFSIZ to allow for stdio buffered data */
 	}
 #endif
 	if (currentsize > SMALLCHUNK) {