484 lines
11 KiB
C
484 lines
11 KiB
C
/* $NetBSD: svr4_fcntl.c,v 1.18 1997/07/21 23:02:35 christos Exp $ */
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/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/filedesc.h>
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#include <sys/ioctl.h>
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#include <sys/kernel.h>
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#include <sys/mount.h>
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#include <sys/malloc.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
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#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_syscallargs.h>
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#include <compat/svr4/svr4_util.h>
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#include <compat/svr4/svr4_fcntl.h>
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static u_long svr4_to_bsd_cmd __P((u_long));
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static int svr4_to_bsd_flags __P((int));
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static int bsd_to_svr4_flags __P((int));
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static void bsd_to_svr4_flock __P((struct flock *, struct svr4_flock *));
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static void svr4_to_bsd_flock __P((struct svr4_flock *, struct flock *));
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static u_long
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svr4_to_bsd_cmd(cmd)
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u_long cmd;
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{
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switch (cmd) {
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case SVR4_F_DUPFD:
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return F_DUPFD;
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case SVR4_F_GETFD:
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return F_GETFD;
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case SVR4_F_SETFD:
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return F_SETFD;
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case SVR4_F_GETFL:
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return F_GETFL;
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case SVR4_F_SETFL:
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return F_SETFL;
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case SVR4_F_GETLK:
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return F_GETLK;
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case SVR4_F_SETLK:
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return F_SETLK;
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case SVR4_F_SETLKW:
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return F_SETLKW;
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default:
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return -1;
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}
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}
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static int
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svr4_to_bsd_flags(l)
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int l;
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{
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int r = 0;
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r |= (l & SVR4_O_RDONLY) ? O_RDONLY : 0;
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r |= (l & SVR4_O_WRONLY) ? O_WRONLY : 0;
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r |= (l & SVR4_O_RDWR) ? O_RDWR : 0;
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r |= (l & SVR4_O_NDELAY) ? O_NONBLOCK : 0;
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r |= (l & SVR4_O_APPEND) ? O_APPEND : 0;
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r |= (l & SVR4_O_SYNC) ? O_FSYNC : 0;
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r |= (l & SVR4_O_NONBLOCK) ? O_NONBLOCK : 0;
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r |= (l & SVR4_O_PRIV) ? O_EXLOCK : 0;
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r |= (l & SVR4_O_CREAT) ? O_CREAT : 0;
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r |= (l & SVR4_O_TRUNC) ? O_TRUNC : 0;
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r |= (l & SVR4_O_EXCL) ? O_EXCL : 0;
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r |= (l & SVR4_O_NOCTTY) ? O_NOCTTY : 0;
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return r;
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}
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static int
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bsd_to_svr4_flags(l)
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int l;
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{
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int r = 0;
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r |= (l & O_RDONLY) ? SVR4_O_RDONLY : 0;
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r |= (l & O_WRONLY) ? SVR4_O_WRONLY : 0;
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r |= (l & O_RDWR) ? SVR4_O_RDWR : 0;
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r |= (l & O_NDELAY) ? SVR4_O_NONBLOCK : 0;
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r |= (l & O_APPEND) ? SVR4_O_APPEND : 0;
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r |= (l & O_FSYNC) ? SVR4_O_SYNC : 0;
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r |= (l & O_NONBLOCK) ? SVR4_O_NONBLOCK : 0;
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r |= (l & O_EXLOCK) ? SVR4_O_PRIV : 0;
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r |= (l & O_CREAT) ? SVR4_O_CREAT : 0;
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r |= (l & O_TRUNC) ? SVR4_O_TRUNC : 0;
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r |= (l & O_EXCL) ? SVR4_O_EXCL : 0;
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r |= (l & O_NOCTTY) ? SVR4_O_NOCTTY : 0;
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return r;
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}
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static void
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bsd_to_svr4_flock(iflp, oflp)
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struct flock *iflp;
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struct svr4_flock *oflp;
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{
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switch (iflp->l_type) {
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case F_RDLCK:
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oflp->l_type = SVR4_F_RDLCK;
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break;
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case F_WRLCK:
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oflp->l_type = SVR4_F_WRLCK;
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break;
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case F_UNLCK:
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oflp->l_type = SVR4_F_UNLCK;
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break;
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default:
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oflp->l_type = -1;
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break;
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}
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oflp->l_whence = (short) iflp->l_whence;
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oflp->l_start = (svr4_off_t) iflp->l_start;
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oflp->l_len = (svr4_off_t) iflp->l_len;
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oflp->l_sysid = 0;
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oflp->l_pid = (svr4_pid_t) iflp->l_pid;
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}
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static void
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svr4_to_bsd_flock(iflp, oflp)
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struct svr4_flock *iflp;
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struct flock *oflp;
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{
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switch (iflp->l_type) {
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case SVR4_F_RDLCK:
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oflp->l_type = F_RDLCK;
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break;
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case SVR4_F_WRLCK:
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oflp->l_type = F_WRLCK;
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break;
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case SVR4_F_UNLCK:
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oflp->l_type = F_UNLCK;
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break;
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default:
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oflp->l_type = -1;
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break;
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}
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oflp->l_whence = iflp->l_whence;
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oflp->l_start = (off_t) iflp->l_start;
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oflp->l_len = (off_t) iflp->l_len;
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oflp->l_pid = (pid_t) iflp->l_pid;
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}
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int
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svr4_sys_open(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_open_args *uap = v;
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int error;
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struct sys_open_args cup;
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caddr_t sg = stackgap_init(p->p_emul);
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SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
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SCARG(&cup, path) = SCARG(uap, path);
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SCARG(&cup, flags) = svr4_to_bsd_flags(SCARG(uap, flags));
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SCARG(&cup, mode) = SCARG(uap, mode);
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error = sys_open(p, &cup, retval);
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if (error)
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return error;
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if (!(SCARG(&cup, flags) & O_NOCTTY) && SESS_LEADER(p) &&
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!(p->p_flag & P_CONTROLT)) {
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struct filedesc *fdp = p->p_fd;
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struct file *fp = fdp->fd_ofiles[*retval];
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/* ignore any error, just give it a try */
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if (fp->f_type == DTYPE_VNODE)
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(fp->f_ops->fo_ioctl) (fp, TIOCSCTTY, (caddr_t) 0, p);
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}
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return 0;
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}
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int
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svr4_sys_open64(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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return svr4_sys_open(p, v, retval);
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}
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int
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svr4_sys_creat(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_creat_args *uap = v;
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struct sys_open_args cup;
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caddr_t sg = stackgap_init(p->p_emul);
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SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
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SCARG(&cup, path) = SCARG(uap, path);
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SCARG(&cup, mode) = SCARG(uap, mode);
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SCARG(&cup, flags) = O_WRONLY | O_CREAT | O_TRUNC;
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return sys_open(p, &cup, retval);
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}
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int
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svr4_sys_creat64(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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return svr4_sys_creat(p, v, retval);
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}
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int
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svr4_sys_llseek(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_llseek_args *uap = v;
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struct sys_lseek_args ap;
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SCARG(&ap, fd) = SCARG(uap, fd);
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#if BYTE_ORDER == BIG_ENDIAN
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SCARG(&ap, offset) = (((long long) SCARG(uap, offset1)) << 32) |
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SCARG(uap, offset2);
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#else
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SCARG(&ap, offset) = (((long long) SCARG(uap, offset2)) << 32) |
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SCARG(uap, offset1);
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#endif
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SCARG(&ap, whence) = SCARG(uap, whence);
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return sys_lseek(p, &ap, retval);
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}
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int
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svr4_sys_access(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_access_args *uap = v;
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struct sys_access_args cup;
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caddr_t sg = stackgap_init(p->p_emul);
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SVR4_CHECK_ALT_EXIST(p, &sg, SCARG(uap, path));
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SCARG(&cup, path) = SCARG(uap, path);
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SCARG(&cup, flags) = SCARG(uap, flags);
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return sys_access(p, &cup, retval);
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}
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int
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svr4_sys_pread(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_pread_args *uap = v;
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struct sys_lseek_args lap;
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struct sys_read_args rap;
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int error;
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SCARG(&lap, fd) = SCARG(uap, fd);
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SCARG(&lap, offset) = SCARG(uap, off);
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SCARG(&lap, whence) = SEEK_CUR;
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if ((error = sys_lseek(p, &lap, retval)) != 0)
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return error;
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SCARG(&rap, fd) = SCARG(uap, fd);
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SCARG(&rap, buf) = SCARG(uap, buf);
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SCARG(&rap, nbyte) = SCARG(uap, nbyte);
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return sys_read(p, &rap, retval);
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}
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int
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svr4_sys_pread64(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_pread64_args *uap = v;
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struct sys_lseek_args lap;
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struct sys_read_args rap;
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int error;
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SCARG(&lap, fd) = SCARG(uap, fd);
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SCARG(&lap, offset) = SCARG(uap, off);
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SCARG(&lap, whence) = SEEK_CUR;
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if ((error = sys_lseek(p, &lap, retval)) != 0)
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return error;
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SCARG(&rap, fd) = SCARG(uap, fd);
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SCARG(&rap, buf) = SCARG(uap, buf);
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SCARG(&rap, nbyte) = SCARG(uap, nbyte);
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return sys_read(p, &rap, retval);
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}
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int
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svr4_sys_pwrite(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_pwrite_args *uap = v;
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struct sys_lseek_args lap;
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struct sys_write_args wap;
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int error;
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SCARG(&lap, fd) = SCARG(uap, fd);
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SCARG(&lap, offset) = SCARG(uap, off);
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SCARG(&lap, whence) = SEEK_CUR;
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if ((error = sys_lseek(p, &lap, retval)) != 0)
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return error;
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SCARG(&wap, fd) = SCARG(uap, fd);
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SCARG(&wap, buf) = SCARG(uap, buf);
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SCARG(&wap, nbyte) = SCARG(uap, nbyte);
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return sys_write(p, &wap, retval);
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}
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int
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svr4_sys_pwrite64(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_pwrite_args *uap = v;
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struct sys_lseek_args lap;
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struct sys_write_args wap;
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int error;
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SCARG(&lap, fd) = SCARG(uap, fd);
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SCARG(&lap, offset) = SCARG(uap, off);
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SCARG(&lap, whence) = SEEK_CUR;
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if ((error = sys_lseek(p, &lap, retval)) != 0)
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return error;
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SCARG(&wap, fd) = SCARG(uap, fd);
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SCARG(&wap, buf) = SCARG(uap, buf);
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SCARG(&wap, nbyte) = SCARG(uap, nbyte);
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return sys_write(p, &wap, retval);
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}
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int
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svr4_sys_fcntl(p, v, retval)
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register struct proc *p;
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void *v;
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register_t *retval;
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{
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struct svr4_sys_fcntl_args *uap = v;
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int error;
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struct sys_fcntl_args fa;
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SCARG(&fa, fd) = SCARG(uap, fd);
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SCARG(&fa, cmd) = svr4_to_bsd_cmd(SCARG(uap, cmd));
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switch (SCARG(&fa, cmd)) {
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case F_DUPFD:
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case F_GETFD:
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case F_SETFD:
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SCARG(&fa, arg) = SCARG(uap, arg);
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return sys_fcntl(p, &fa, retval);
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case F_GETFL:
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SCARG(&fa, arg) = SCARG(uap, arg);
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error = sys_fcntl(p, &fa, retval);
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if (error)
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return error;
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*retval = bsd_to_svr4_flags(*retval);
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return error;
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case F_SETFL:
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{
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/*
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* we must save the O_ASYNC flag, as that is
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* handled by ioctl(_, I_SETSIG, _) emulation.
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*/
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int cmd, flags;
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cmd = SCARG(&fa, cmd); /* save it for a while */
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SCARG(&fa, cmd) = F_GETFL;
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if ((error = sys_fcntl(p, &fa, &flags)) != 0)
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return error;
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flags &= O_ASYNC;
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flags |= svr4_to_bsd_flags((u_long) SCARG(uap, arg));
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SCARG(&fa, cmd) = cmd;
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SCARG(&fa, arg) = (void *) flags;
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return sys_fcntl(p, &fa, retval);
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}
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case F_GETLK:
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case F_SETLK:
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case F_SETLKW:
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{
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struct svr4_flock ifl;
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struct flock *flp, fl;
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caddr_t sg = stackgap_init(p->p_emul);
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flp = stackgap_alloc(&sg, sizeof(struct flock));
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SCARG(&fa, arg) = (void *) flp;
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error = copyin(SCARG(uap, arg), &ifl, sizeof ifl);
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if (error)
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return error;
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svr4_to_bsd_flock(&ifl, &fl);
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error = copyout(&fl, flp, sizeof fl);
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if (error)
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return error;
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error = sys_fcntl(p, &fa, retval);
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if (error || SCARG(&fa, cmd) != F_GETLK)
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return error;
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error = copyin(flp, &fl, sizeof fl);
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if (error)
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return error;
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bsd_to_svr4_flock(&fl, &ifl);
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return copyout(&ifl, SCARG(uap, arg), sizeof ifl);
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}
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default:
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return ENOSYS;
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}
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}
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