[Bug libc/15312] New: SEEK_HOLE and SEEK_DATA not exported as expected

["sourceware dot org at jan-o-sch dot net" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15312

             Bug #: 15312
           Summary: SEEK_HOLE and SEEK_DATA not exported as expected
           Product: glibc
           Version: 2.17
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: sourceware.org@jan-o-sch.net
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


The man pages for lseek(2) state one should include <sys/types.h> and
<unistd.h>. Doing so does not export SEEK_HOLE and SEEK_DATA.

Freshly built from git version 2.17.90, top commit
28831a9a671b109e49d0a4ddce00a08d734bfc97.

The following dummy source should build but doesn't:

--
#include <sys/types.h>
#include <unistd.h>

void
main(void)
{
        lseek(0, 0, SEEK_DATA);
        lseek(0, 0, SEEK_HOLE);
}
--

Errors:
/tmp/test.c: In function 'main':
/tmp/test.c:7: error: 'SEEK_DATA' undeclared (first use in this function)
/tmp/test.c:7: error: (Each undeclared identifier is reported only once
/tmp/test.c:7: error: for each function it appears in.)
/tmp/test.c:8: error: 'SEEK_HOLE' undeclared (first use in this function)

Including <linux/fs.h> is a work-around, but that should really be included
internally.

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