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NetBSD/sys/compat/svr4/svr4_fcntl.c

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/* $NetBSD: svr4_fcntl.c,v 1.21 1997/10/28 18:55:56 christos Exp $ */
/*
* Copyright (c) 1994, 1997 Christos Zoulas. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christos Zoulas.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/filedesc.h>
#include <sys/ioctl.h>
#include <sys/kernel.h>
#include <sys/mount.h>
#include <sys/malloc.h>
#include <sys/vnode.h>
#include <sys/syscallargs.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/svr4/svr4_util.h>
#include <compat/svr4/svr4_fcntl.h>
static u_long svr4_to_bsd_cmd __P((u_long));
static int svr4_to_bsd_flags __P((int));
static int bsd_to_svr4_flags __P((int));
static void bsd_to_svr4_flock __P((struct flock *, struct svr4_flock *));
static void svr4_to_bsd_flock __P((struct svr4_flock *, struct flock *));
static void bsd_to_svr4_flock64 __P((struct flock *, struct svr4_flock64 *));
static void svr4_to_bsd_flock64 __P((struct svr4_flock64 *, struct flock *));
static int fd_revoke __P((struct proc *, int, register_t *));
static int fd_truncate __P((struct proc *, int, struct flock *, register_t *));
static u_long
svr4_to_bsd_cmd(cmd)
u_long cmd;
{
switch (cmd) {
case SVR4_F_DUPFD:
return F_DUPFD;
case SVR4_F_GETFD:
return F_GETFD;
case SVR4_F_SETFD:
return F_SETFD;
case SVR4_F_GETFL:
return F_GETFL;
case SVR4_F_SETFL:
return F_SETFL;
case SVR4_F_GETLK:
return F_GETLK;
case SVR4_F_SETLK:
return F_SETLK;
case SVR4_F_SETLKW:
return F_SETLKW;
default:
return -1;
}
}
static int
svr4_to_bsd_flags(l)
int l;
{
int r = 0;
r |= (l & SVR4_O_RDONLY) ? O_RDONLY : 0;
r |= (l & SVR4_O_WRONLY) ? O_WRONLY : 0;
r |= (l & SVR4_O_RDWR) ? O_RDWR : 0;
r |= (l & SVR4_O_NDELAY) ? O_NONBLOCK : 0;
r |= (l & SVR4_O_APPEND) ? O_APPEND : 0;
r |= (l & SVR4_O_SYNC) ? O_FSYNC : 0;
r |= (l & SVR4_O_NONBLOCK) ? O_NONBLOCK : 0;
r |= (l & SVR4_O_PRIV) ? O_EXLOCK : 0;
r |= (l & SVR4_O_CREAT) ? O_CREAT : 0;
r |= (l & SVR4_O_TRUNC) ? O_TRUNC : 0;
r |= (l & SVR4_O_EXCL) ? O_EXCL : 0;
r |= (l & SVR4_O_NOCTTY) ? O_NOCTTY : 0;
return r;
}
static int
bsd_to_svr4_flags(l)
int l;
{
int r = 0;
r |= (l & O_RDONLY) ? SVR4_O_RDONLY : 0;
r |= (l & O_WRONLY) ? SVR4_O_WRONLY : 0;
r |= (l & O_RDWR) ? SVR4_O_RDWR : 0;
r |= (l & O_NDELAY) ? SVR4_O_NONBLOCK : 0;
r |= (l & O_APPEND) ? SVR4_O_APPEND : 0;
r |= (l & O_FSYNC) ? SVR4_O_SYNC : 0;
r |= (l & O_NONBLOCK) ? SVR4_O_NONBLOCK : 0;
r |= (l & O_EXLOCK) ? SVR4_O_PRIV : 0;
r |= (l & O_CREAT) ? SVR4_O_CREAT : 0;
r |= (l & O_TRUNC) ? SVR4_O_TRUNC : 0;
r |= (l & O_EXCL) ? SVR4_O_EXCL : 0;
r |= (l & O_NOCTTY) ? SVR4_O_NOCTTY : 0;
return r;
}
static void
bsd_to_svr4_flock(iflp, oflp)
struct flock *iflp;
struct svr4_flock *oflp;
{
switch (iflp->l_type) {
case F_RDLCK:
oflp->l_type = SVR4_F_RDLCK;
break;
case F_WRLCK:
oflp->l_type = SVR4_F_WRLCK;
break;
case F_UNLCK:
oflp->l_type = SVR4_F_UNLCK;
break;
default:
oflp->l_type = -1;
break;
}
oflp->l_whence = (short) iflp->l_whence;
oflp->l_start = (svr4_off_t) iflp->l_start;
oflp->l_len = (svr4_off_t) iflp->l_len;
oflp->l_sysid = 0;
oflp->l_pid = (svr4_pid_t) iflp->l_pid;
}
static void
svr4_to_bsd_flock(iflp, oflp)
struct svr4_flock *iflp;
struct flock *oflp;
{
switch (iflp->l_type) {
case SVR4_F_RDLCK:
oflp->l_type = F_RDLCK;
break;
case SVR4_F_WRLCK:
oflp->l_type = F_WRLCK;
break;
case SVR4_F_UNLCK:
oflp->l_type = F_UNLCK;
break;
default:
oflp->l_type = -1;
break;
}
oflp->l_whence = iflp->l_whence;
oflp->l_start = (off_t) iflp->l_start;
oflp->l_len = (off_t) iflp->l_len;
oflp->l_pid = (pid_t) iflp->l_pid;
}
static void
bsd_to_svr4_flock64(iflp, oflp)
struct flock *iflp;
struct svr4_flock64 *oflp;
{
switch (iflp->l_type) {
case F_RDLCK:
oflp->l_type = SVR4_F_RDLCK;
break;
case F_WRLCK:
oflp->l_type = SVR4_F_WRLCK;
break;
case F_UNLCK:
oflp->l_type = SVR4_F_UNLCK;
break;
default:
oflp->l_type = -1;
break;
}
oflp->l_whence = (short) iflp->l_whence;
oflp->l_start = (svr4_off64_t) iflp->l_start;
oflp->l_len = (svr4_off64_t) iflp->l_len;
oflp->l_sysid = 0;
oflp->l_pid = (svr4_pid_t) iflp->l_pid;
}
static void
svr4_to_bsd_flock64(iflp, oflp)
struct svr4_flock64 *iflp;
struct flock *oflp;
{
switch (iflp->l_type) {
case SVR4_F_RDLCK:
oflp->l_type = F_RDLCK;
break;
case SVR4_F_WRLCK:
oflp->l_type = F_WRLCK;
break;
case SVR4_F_UNLCK:
oflp->l_type = F_UNLCK;
break;
default:
oflp->l_type = -1;
break;
}
oflp->l_whence = iflp->l_whence;
oflp->l_start = (off_t) iflp->l_start;
oflp->l_len = (off_t) iflp->l_len;
oflp->l_pid = (pid_t) iflp->l_pid;
}
static int
fd_revoke(p, fd, retval)
struct proc *p;
int fd;
register_t *retval;
{
struct filedesc *fdp = p->p_fd;
struct file *fp;
struct vnode *vp;
struct vattr vattr;
int error;
if ((u_int)fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL)
return EBADF;
switch (fp->f_type) {
case DTYPE_VNODE:
vp = (struct vnode *) fp->f_data;
case DTYPE_SOCKET:
return EINVAL;
default:
panic("svr4_fcntl(F_REVOKE)");
/*NOTREACHED*/
}
if (vp->v_type != VCHR && vp->v_type != VBLK) {
error = EINVAL;
goto out;
}
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
goto out;
if (p->p_ucred->cr_uid != vattr.va_uid &&
(error = suser(p->p_ucred, &p->p_acflag)) != 0)
goto out;
if (vp->v_usecount > 1 || (vp->v_flag & VALIASED))
vgoneall(vp);
out:
vrele(vp);
return error;
}
static int
fd_truncate(p, fd, flp, retval)
struct proc *p;
int fd;
struct flock *flp;
register_t *retval;
{
struct filedesc *fdp = p->p_fd;
struct file *fp;
off_t start, length;
struct vnode *vp;
struct vattr vattr;
int error;
struct sys_ftruncate_args ft;
/*
* We only support truncating the file.
*/
if ((u_int)fd >= fdp->fd_nfiles || (fp = fdp->fd_ofiles[fd]) == NULL)
return EBADF;
vp = (struct vnode *)fp->f_data;
if (fp->f_type != DTYPE_VNODE
#ifdef FIFO
|| vp->v_type == VFIFO
#endif
)
return ESPIPE;
if ((error = VOP_GETATTR(vp, &vattr, p->p_ucred, p)) != 0)
return error;
length = vattr.va_size;
switch (flp->l_whence) {
case SEEK_CUR:
start = fp->f_offset + flp->l_start;
break;
case SEEK_END:
start = flp->l_start + length;
break;
case SEEK_SET:
start = flp->l_start;
break;
default:
return EINVAL;
}
if (start + flp->l_len < length) {
/* We don't support free'ing in the middle of the file */
return EINVAL;
}
SCARG(&ft, fd) = fd;
SCARG(&ft, length) = start;
return sys_ftruncate(p, &ft, retval);
}
int
svr4_sys_open(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_open_args *uap = v;
int error;
struct sys_open_args cup;
caddr_t sg = stackgap_init(p->p_emul);
SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&cup, path) = SCARG(uap, path);
SCARG(&cup, flags) = svr4_to_bsd_flags(SCARG(uap, flags));
SCARG(&cup, mode) = SCARG(uap, mode);
error = sys_open(p, &cup, retval);
if (error)
return error;
if (!(SCARG(&cup, flags) & O_NOCTTY) && SESS_LEADER(p) &&
!(p->p_flag & P_CONTROLT)) {
struct filedesc *fdp = p->p_fd;
struct file *fp = fdp->fd_ofiles[*retval];
/* ignore any error, just give it a try */
if (fp->f_type == DTYPE_VNODE)
(fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p);
}
return 0;
}
int
svr4_sys_open64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
return svr4_sys_open(p, v, retval);
}
int
svr4_sys_creat(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_creat_args *uap = v;
struct sys_open_args cup;
caddr_t sg = stackgap_init(p->p_emul);
SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&cup, path) = SCARG(uap, path);
SCARG(&cup, mode) = SCARG(uap, mode);
SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
return sys_open(p, &cup, retval);
}
int
svr4_sys_creat64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
return svr4_sys_creat(p, v, retval);
}
int
svr4_sys_llseek(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_llseek_args *uap = v;
struct sys_lseek_args ap;
SCARG(&ap, fd) = SCARG(uap, fd);
#if BYTE_ORDER == BIG_ENDIAN
SCARG(&ap, offset) = (((long long) SCARG(uap, offset1)) << 32) |
SCARG(uap, offset2);
#else
SCARG(&ap, offset) = (((long long) SCARG(uap, offset2)) << 32) |
SCARG(uap, offset1);
#endif
SCARG(&ap, whence) = SCARG(uap, whence);
return sys_lseek(p, &ap, retval);
}
int
svr4_sys_access(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_access_args *uap = v;
struct sys_access_args cup;
caddr_t sg = stackgap_init(p->p_emul);
SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
SCARG(&cup, path) = SCARG(uap, path);
SCARG(&cup, flags) = SCARG(uap, flags);
return sys_access(p, &cup, retval);
}
int
svr4_sys_pread(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_pread_args *uap = v;
struct sys_lseek_args lap;
struct sys_read_args rap;
register_t retval2;
off_t oldoff;
int error, error2;
/*
* Record the current file offset; it will be restored after
* completition of the actual read operation.
*/
SCARG(&lap, fd) = SCARG(uap, fd);
SCARG(&lap, offset) = 0;
SCARG(&lap, whence) = SEEK_CUR;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
oldoff = *(off_t *)retval;
/* Seek to the requested file offset. */
SCARG(&lap, offset) = SCARG(uap, off);
SCARG(&lap, whence) = SEEK_SET;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
/* Perform the actual read operation. */
SCARG(&rap, fd) = SCARG(uap, fd);
SCARG(&rap, buf) = SCARG(uap, buf);
SCARG(&rap, nbyte) = SCARG(uap, nbyte);
error = sys_read(p, &rap, retval);
/* In any case, try to seek back to the old file offset. */
SCARG(&lap, offset) = oldoff;
error2 = sys_lseek(p, &lap, &retval2);
return (error == 0 ? error2 : error);
}
int
svr4_sys_pread64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_pread64_args *uap = v;
struct sys_lseek_args lap;
struct sys_read_args rap;
register_t retval2;
off_t oldoff;
int error, error2;
/*
* Record the current file offset; it will be restored after
* completition of the actual read operation.
*/
SCARG(&lap, fd) = SCARG(uap, fd);
SCARG(&lap, offset) = 0;
SCARG(&lap, whence) = SEEK_CUR;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
oldoff = *(off_t *)retval;
/* Seek to the requested file offset. */
SCARG(&lap, offset) = SCARG(uap, off);
SCARG(&lap, whence) = SEEK_SET;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
/* Perform the actual read operation. */
SCARG(&rap, fd) = SCARG(uap, fd);
SCARG(&rap, buf) = SCARG(uap, buf);
SCARG(&rap, nbyte) = SCARG(uap, nbyte);
error = sys_read(p, &rap, retval);
/* In any case, try to seek back to the old file offset. */
SCARG(&lap, offset) = oldoff;
error2 = sys_lseek(p, &lap, &retval2);
return (error == 0 ? error2 : error);
}
int
svr4_sys_pwrite(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_pwrite_args *uap = v;
struct sys_lseek_args lap;
struct sys_write_args rap;
register_t retval2;
off_t oldoff;
int error, error2;
/*
* Record the current file offset; it will be restored after
* completition of the actual write operation.
*/
SCARG(&lap, fd) = SCARG(uap, fd);
SCARG(&lap, offset) = 0;
SCARG(&lap, whence) = SEEK_CUR;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
oldoff = *(off_t *)retval;
/* Seek to the requested file offset. */
SCARG(&lap, offset) = SCARG(uap, off);
SCARG(&lap, whence) = SEEK_SET;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
/* Perform the actual write operation. */
SCARG(&rap, fd) = SCARG(uap, fd);
SCARG(&rap, buf) = SCARG(uap, buf);
SCARG(&rap, nbyte) = SCARG(uap, nbyte);
error = sys_write(p, &rap, retval);
/* In any case, try to seek back to the old file offset. */
SCARG(&lap, offset) = oldoff;
error2 = sys_lseek(p, &lap, &retval2);
return (error == 0 ? error2 : error);
}
int
svr4_sys_pwrite64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_pwrite64_args *uap = v;
struct sys_lseek_args lap;
struct sys_write_args rap;
register_t retval2;
off_t oldoff;
int error, error2;
/*
* Record the current file offset; it will be restored after
* completition of the actual write operation.
*/
SCARG(&lap, fd) = SCARG(uap, fd);
SCARG(&lap, offset) = 0;
SCARG(&lap, whence) = SEEK_CUR;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
oldoff = *(off_t *)retval;
/* Seek to the requested file offset. */
SCARG(&lap, offset) = SCARG(uap, off);
SCARG(&lap, whence) = SEEK_SET;
if ((error = sys_lseek(p, &lap, retval)) != 0)
return error;
/* Perform the actual write operation. */
SCARG(&rap, fd) = SCARG(uap, fd);
SCARG(&rap, buf) = SCARG(uap, buf);
SCARG(&rap, nbyte) = SCARG(uap, nbyte);
error = sys_write(p, &rap, retval);
/* In any case, try to seek back to the old file offset. */
SCARG(&lap, offset) = oldoff;
error2 = sys_lseek(p, &lap, &retval2);
return (error == 0 ? error2 : error);
}
int
svr4_sys_fcntl(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_fcntl_args *uap = v;
int error;
struct sys_fcntl_args fa;
SCARG(&fa, fd) = SCARG(uap, fd);
SCARG(&fa, cmd) = svr4_to_bsd_cmd(SCARG(uap, cmd));
switch (SCARG(&fa, cmd)) {
case F_DUPFD:
case F_GETFD:
case F_SETFD:
SCARG(&fa, arg) = SCARG(uap, arg);
return sys_fcntl(p, &fa, retval);
case F_GETFL:
SCARG(&fa, arg) = SCARG(uap, arg);
error = sys_fcntl(p, &fa, retval);
if (error)
return error;
*retval = bsd_to_svr4_flags(*retval);
return error;
case F_SETFL:
{
/*
* we must save the O_ASYNC flag, as that is
* handled by ioctl(_, I_SETSIG, _) emulation.
*/
int cmd, flags;
cmd = SCARG(&fa, cmd); /* save it for a while */
SCARG(&fa, cmd) = F_GETFL;
if ((error = sys_fcntl(p, &fa, &flags)) != 0)
return error;
flags &= O_ASYNC;
flags |= svr4_to_bsd_flags((u_long) SCARG(uap, arg));
SCARG(&fa, cmd) = cmd;
SCARG(&fa, arg) = (void *) flags;
return sys_fcntl(p, &fa, retval);
}
case F_GETLK:
case F_SETLK:
case F_SETLKW:
{
struct svr4_flock ifl;
struct flock *flp, fl;
caddr_t sg = stackgap_init(p->p_emul);
flp = stackgap_alloc(&sg, sizeof(struct flock));
SCARG(&fa, arg) = (void *) flp;
error = copyin(SCARG(uap, arg), &ifl, sizeof ifl);
if (error)
return error;
svr4_to_bsd_flock(&ifl, &fl);
error = copyout(&fl, flp, sizeof fl);
if (error)
return error;
error = sys_fcntl(p, &fa, retval);
if (error || SCARG(&fa, cmd) != F_GETLK)
return error;
error = copyin(flp, &fl, sizeof fl);
if (error)
return error;
bsd_to_svr4_flock(&fl, &ifl);
return copyout(&ifl, SCARG(uap, arg), sizeof ifl);
}
case -1:
switch (SCARG(uap, cmd)) {
case SVR4_F_DUP2FD:
{
struct sys_dup2_args du;
SCARG(&du, from) = SCARG(uap, fd);
error = copyin(SCARG(uap, arg),
&SCARG(&du, to), sizeof SCARG(&du, to));
if (error)
return error;
error = sys_dup2(p, &du, retval);
if (error)
return error;
*retval = SCARG(&du, to);
return 0;
}
case SVR4_F_FREESP:
{
struct svr4_flock ifl;
struct flock fl;
error = copyin(SCARG(uap, arg), &ifl,
sizeof ifl);
if (error)
return error;
svr4_to_bsd_flock(&ifl, &fl);
return fd_truncate(p, SCARG(uap, fd), &fl,
retval);
}
case SVR4_F_GETLK64:
case SVR4_F_SETLK64:
case SVR4_F_SETLKW64:
{
struct svr4_flock64 ifl;
struct flock *flp, fl;
caddr_t sg = stackgap_init(p->p_emul);
flp = stackgap_alloc(&sg, sizeof(struct flock));
SCARG(&fa, arg) = (void *) flp;
error = copyin(SCARG(uap, arg), &ifl,
sizeof ifl);
if (error)
return error;
svr4_to_bsd_flock64(&ifl, &fl);
error = copyout(&fl, flp, sizeof fl);
if (error)
return error;
error = sys_fcntl(p, &fa, retval);
if (error || SCARG(&fa, cmd) != F_GETLK)
return error;
error = copyin(flp, &fl, sizeof fl);
if (error)
return error;
bsd_to_svr4_flock64(&fl, &ifl);
return copyout(&ifl, SCARG(uap, arg),
sizeof ifl);
}
case SVR4_F_FREESP64:
{
struct svr4_flock64 ifl;
struct flock fl;
error = copyin(SCARG(uap, arg), &ifl,
sizeof ifl);
if (error)
return error;
svr4_to_bsd_flock64(&ifl, &fl);
return fd_truncate(p, SCARG(uap, fd), &fl,
retval);
}
case SVR4_F_REVOKE:
return fd_revoke(p, SCARG(uap, fd), retval);
default:
return ENOSYS;
}
default:
return ENOSYS;
}
}
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