misc/50825: lseek to negative file positions screws up flags

Erdgeist erdgeist at erdgeist.org
Fri Apr 11 08:50:18 PDT 2003


>Number:         50825
>Category:       misc
>Synopsis:       lseek to negative file positions screws up flags
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri Apr 11 08:50:16 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     Erdgeist
>Release:        FreeBSD 5.0-CURRENT i386
>Organization:
erdgeist.org
>Environment:
System: FreeBSD bauklotz.gate5.de 5.0-CURRENT FreeBSD 5.0-CURRENT #3: Thu Apr 10 20:53:26 CEST 2003 root at bauklotz.gate5.de:/usr/obj/usr/src/sys/bauklotz i386

>Description:
        Doing a lseek to a position before the file results in corrupted
        File flags.
>How-To-Repeat:
#include <unistd.h>
#include <fcntl.h>

int main( ) {
    int a = open( "testfile", O_CREAT | O_RDWR );
    lseek( a, -10, SEEK_CUR);
    close( a );
    return 0;
}
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:


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