lseek3d.c revision 3f54fd611f536639ec30dd53c48e5ec1897cc7d9
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1989-2011 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* Glenn Fowler <gsf@research.att.com> *
* David Korn <dgk@research.att.com> *
* Eduardo Krell <ekrell@adexus.cl> *
* *
***********************************************************************/
#pragma prototyped
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:hide lseek
#else
#define lseek ______lseek
#endif
#define _def_syscall_3d 1
#define _LS_H 1
#include "3d.h"
#undef _def_syscall_3d
#if defined(__STDPP__directive) && defined(__STDPP__hide)
__STDPP__directive pragma pp:nohide lseek
#else
#undef lseek
#endif
#include "FEATURE/syscall"
#ifdef lseek3d
#if !_nosys_lseek64 && _typ_off64_t
typedef off64_t (*Seek64_f)(int, off64_t, int);
#undef off_t
#undef lseek
off64_t
lseek64(int fd, off64_t off, int op)
{
off64_t r;
int n;
int m;
static Seek64_f seekf;
#if FS
Mount_t* mp;
if (!fscall(NiL, MSG_seek, 0, fd, off, op))
return state.ret;
mp = monitored();
#endif
if (!seekf)
seekf = (Seek64_f)sysfunc(SYS3D_lseek64);
for (m = state.trap.size - 1; m >= 0; m--)
if (MSG_MASK(MSG_seek) & state.trap.intercept[m].mask)
break;
if (m >= 0)
{
n = state.trap.size;
state.trap.size = m;
r = (*state.trap.intercept[m].call)(&state.trap.intercept[m], MSG_seek, SYS3D_lseek64, (void*)fd, (void*)&off, (void*)op, NiL, NiL, NiL) ? -1 : off;
state.trap.size = n;
}
else
r = (*seekf)(fd, off, op);
#if FS
if (r != (off64_t)(-1))
{
if (mp)
fscall(mp, MSG_seek, r, fd, off, op);
for (mp = state.global; mp; mp = mp->global)
if (fssys(mp, MSG_seek))
fscall(mp, MSG_seek, r, fd, off, op);
}
#endif
return r;
}
#endif
typedef off_t (*Seek_f)(int, off_t, int);
off_t
lseek3d(int fd, off_t off, int op)
{
off_t r;
static Seek_f seekf;
#if FS
Mount_t* mp;
if (!fscall(NiL, MSG_seek, 0, fd, off, op))
return state.ret;
mp = monitored();
#endif
if (sizeof(off_t) > sizeof(long))
{
if (!seekf)
seekf = (Seek_f)sysfunc(SYS3D_lseek);
r = (*seekf)(fd, off, op);
}
else if ((r = LSEEK(fd, off, op)) == -1)
return -1;
#if FS
if (mp)
fscall(mp, MSG_seek, r, fd, off, op);
for (mp = state.global; mp; mp = mp->global)
if (fssys(mp, MSG_seek))
fscall(mp, MSG_seek, r, fd, off, op);
#endif
return r;
}
#else
NoN(lseek)
#endif