Bug 54577

Summary:

fscanf() != EOF for empty file

Product:

[Retired] Red Hat Linux

Reporter:

Need Real Name <itsphone>

Component:

glibc

Assignee:

Jakub Jelinek <jakub>

Status:

CLOSED ERRATA

QA Contact:

Aaron Brown <abrown>

Severity:

medium

Docs Contact:

Priority:

medium

Version:

7.0

CC:

fweimer

Target Milestone:

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Target Release:

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Hardware:

i386

OS:

Linux

Whiteboard:

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

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Clone Of:

Environment:

Last Closed:

2001-10-19 17:25:52 UTC

Type:

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Regression:

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Mount Type:

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Documentation:

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CRM:

Verified Versions:

Category:

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oVirt Team:

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RHEL 7.3 requirements from Atomic Host:

Cloudforms Team:

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Target Upstream Version:

Embargoed:

Attachments:

Description	Flags
source code that demonstrates EOF problem in fscanf	none

Description Need Real Name 2001-10-12 20:22:40 UTC

Description of Problem:
fscanf does not return EOF if attempt to read fro 0 length file

Version-Release number of selected component (if applicable):
 rpm 2.1.19-14

How Reproducible:


Steps to Reproduce:
1. open file for writing, then close file
2. open file for read (filehandle != NULL)
3. fscanf(filehandle) returns 0 not EOF as expected

Actual Results:
returns 0

Expected Results:
expect EOF

Additional Information:
on linux6.2 fscanf returns EOF
feof(filehandle) is also wrong!
I'm new to Linux but have experience in C

Comment 1 Jakub Jelinek 2001-10-15 09:19:30 UTC

Can you come up with a testcase?
It depends on what arguments fscanf gets.

Comment 2 Need Real Name 2001-10-19 17:25:46 UTC

Created attachment 34422 [details]
source code that demonstrates EOF problem in fscanf

Comment 3 Jakub Jelinek 2001-10-19 20:28:04 UTC

What glibc do you use?
Under glibc-2.2.4-19 (which is the same source as 2.2.4-18.7.0,
latest 7.0 errata), I get:
fscanf result is -1, EOF value is -1

Comment 4 Need Real Name 2001-10-19 21:29:09 UTC

I performed the standard 7.0 installation.

rpm shows glibc 2.1.92

Comment 5 Need Real Name 2001-10-23 21:53:14 UTC

glibc-2.2.4-19 fixes the problem! Thanks.