Bug 80713

Summary: Error for fseek() / fwrite() operation
Product: [Retired] Red Hat Linux Reporter: Jean-Jacques Sarton <jj.sarton>
Component: glibcAssignee: Jakub Jelinek <jakub>
Status: CLOSED WORKSFORME QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 7.3CC: fweimer
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2003-10-03 10:23:50 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Jean-Jacques Sarton 2002-12-30 12:29:00 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.72 [de] (X11; I; Linux 2.2.14 i586)

Description of problem:
The following code don't work:

fp = fopen("file", "r+");
fseek(fp,20L,SEEK_END);
pos = ftell(fp);
printf("Positionned at %d\n",pos);
fwrite(data, 100, 1 fp);
pos = ftell(fp);
printf("Positionned at %d\n",pos);
fclose(fp);

The data pointed by data are written at offset 0.
Ftell() report that all is OK.



Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. see above
2.
3.
    

Actual Results:  Positionned at 20
Positionned at 120

In fact the data was written at offset 0!

Expected Results:  proper work

Additional info:

Comment 1 Jakub Jelinek 2003-01-07 16:46:05 UTC
You haven't specified how big file initially is.
If I create it empty (ie. touch file before running the prog),
I certainly cannot reproduce this, the data is written at offset 20 till
offset 120.

Comment 2 Ulrich Drepper 2003-10-03 10:23:50 UTC
No reply in almost nine months.  We cannot reproduce a problem.  Closing the bug
now.