6e646651d3
have both kern_open() and kern_openat(); change the callers to use kern_openat(). This removes one (sometimes two) levels of indirection and consolidates arguments checks. Reviewed by: mckusick Sponsored by: The FreeBSD Foundation MFC after: 1 week
318 lines
8.2 KiB
C
318 lines
8.2 KiB
C
/*-
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* Copyright (c) 1995 Scott Bartram
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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/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_spx_hack.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/capsicum.h>
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#include <sys/fcntl.h>
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#include <sys/file.h>
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#include <sys/filedesc.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/syscallsubr.h>
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#include <sys/sysproto.h>
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#include <sys/ttycom.h>
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#include <i386/ibcs2/ibcs2_fcntl.h>
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#include <i386/ibcs2/ibcs2_signal.h>
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#include <i386/ibcs2/ibcs2_proto.h>
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#include <i386/ibcs2/ibcs2_util.h>
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static void cvt_iflock2flock(struct ibcs2_flock *, struct flock *);
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static void cvt_flock2iflock(struct flock *, struct ibcs2_flock *);
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static int cvt_o_flags(int);
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static int oflags2ioflags(int);
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static int ioflags2oflags(int);
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static int
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cvt_o_flags(flags)
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int flags;
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{
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int r = 0;
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/* convert mode into NetBSD mode */
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if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
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if (flags & IBCS2_O_RDWR) r |= O_RDWR;
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if (flags & (IBCS2_O_NDELAY | IBCS2_O_NONBLOCK)) r |= O_NONBLOCK;
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if (flags & IBCS2_O_APPEND) r |= O_APPEND;
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if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
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if (flags & IBCS2_O_CREAT) r |= O_CREAT;
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if (flags & IBCS2_O_TRUNC) r |= O_TRUNC /* | O_CREAT ??? */;
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if (flags & IBCS2_O_EXCL) r |= O_EXCL;
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if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
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if (flags & IBCS2_O_PRIV) r |= O_EXLOCK;
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if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
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return r;
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}
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static void
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cvt_flock2iflock(flp, iflp)
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struct flock *flp;
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struct ibcs2_flock *iflp;
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{
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switch (flp->l_type) {
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case F_RDLCK:
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iflp->l_type = IBCS2_F_RDLCK;
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break;
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case F_WRLCK:
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iflp->l_type = IBCS2_F_WRLCK;
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break;
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case F_UNLCK:
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iflp->l_type = IBCS2_F_UNLCK;
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break;
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}
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iflp->l_whence = (short)flp->l_whence;
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iflp->l_start = (ibcs2_off_t)flp->l_start;
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iflp->l_len = (ibcs2_off_t)flp->l_len;
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iflp->l_sysid = flp->l_sysid;
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iflp->l_pid = (ibcs2_pid_t)flp->l_pid;
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}
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#ifdef DEBUG_IBCS2
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static void
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print_flock(struct flock *flp)
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{
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printf("flock: start=%x len=%x pid=%d type=%d whence=%d\n",
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(int)flp->l_start, (int)flp->l_len, (int)flp->l_pid,
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flp->l_type, flp->l_whence);
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}
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#endif
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static void
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cvt_iflock2flock(iflp, flp)
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struct ibcs2_flock *iflp;
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struct flock *flp;
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{
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flp->l_start = (off_t)iflp->l_start;
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flp->l_len = (off_t)iflp->l_len;
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flp->l_pid = (pid_t)iflp->l_pid;
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switch (iflp->l_type) {
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case IBCS2_F_RDLCK:
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flp->l_type = F_RDLCK;
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break;
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case IBCS2_F_WRLCK:
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flp->l_type = F_WRLCK;
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break;
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case IBCS2_F_UNLCK:
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flp->l_type = F_UNLCK;
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break;
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}
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flp->l_whence = iflp->l_whence;
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flp->l_sysid = iflp->l_sysid;
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}
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/* convert iBCS2 mode into NetBSD mode */
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static int
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ioflags2oflags(flags)
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int flags;
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{
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int r = 0;
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if (flags & IBCS2_O_RDONLY) r |= O_RDONLY;
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if (flags & IBCS2_O_WRONLY) r |= O_WRONLY;
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if (flags & IBCS2_O_RDWR) r |= O_RDWR;
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if (flags & IBCS2_O_NDELAY) r |= O_NONBLOCK;
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if (flags & IBCS2_O_APPEND) r |= O_APPEND;
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if (flags & IBCS2_O_SYNC) r |= O_FSYNC;
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if (flags & IBCS2_O_NONBLOCK) r |= O_NONBLOCK;
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if (flags & IBCS2_O_CREAT) r |= O_CREAT;
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if (flags & IBCS2_O_TRUNC) r |= O_TRUNC;
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if (flags & IBCS2_O_EXCL) r |= O_EXCL;
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if (flags & IBCS2_O_NOCTTY) r |= O_NOCTTY;
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return r;
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}
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/* convert NetBSD mode into iBCS2 mode */
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static int
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oflags2ioflags(flags)
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int flags;
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{
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int r = 0;
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if (flags & O_RDONLY) r |= IBCS2_O_RDONLY;
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if (flags & O_WRONLY) r |= IBCS2_O_WRONLY;
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if (flags & O_RDWR) r |= IBCS2_O_RDWR;
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if (flags & O_NDELAY) r |= IBCS2_O_NONBLOCK;
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if (flags & O_APPEND) r |= IBCS2_O_APPEND;
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if (flags & O_FSYNC) r |= IBCS2_O_SYNC;
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if (flags & O_NONBLOCK) r |= IBCS2_O_NONBLOCK;
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if (flags & O_CREAT) r |= IBCS2_O_CREAT;
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if (flags & O_TRUNC) r |= IBCS2_O_TRUNC;
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if (flags & O_EXCL) r |= IBCS2_O_EXCL;
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if (flags & O_NOCTTY) r |= IBCS2_O_NOCTTY;
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return r;
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}
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int
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ibcs2_open(td, uap)
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struct thread *td;
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struct ibcs2_open_args *uap;
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{
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struct proc *p;
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char *path;
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int flags, noctty, ret;
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p = td->td_proc;
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noctty = uap->flags & IBCS2_O_NOCTTY;
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flags = cvt_o_flags(uap->flags);
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if (uap->flags & O_CREAT)
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CHECKALTCREAT(td, uap->path, &path);
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else
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CHECKALTEXIST(td, uap->path, &path);
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ret = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE, flags, uap->mode);
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#ifdef SPX_HACK
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if (ret == ENXIO) {
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if (!strcmp(path, "/compat/ibcs2/dev/spx"))
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ret = spx_open(td);
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free(path, M_TEMP);
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} else
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#endif /* SPX_HACK */
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free(path, M_TEMP);
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PROC_LOCK(p);
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if (!ret && !noctty && SESS_LEADER(p) && !(p->p_flag & P_CONTROLT)) {
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cap_rights_t rights;
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struct file *fp;
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int error;
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error = fget(td, td->td_retval[0],
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cap_rights_init(&rights, CAP_IOCTL), &fp);
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PROC_UNLOCK(p);
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if (error)
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return (EBADF);
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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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fo_ioctl(fp, TIOCSCTTY, (caddr_t) 0, td->td_ucred,
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td);
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fdrop(fp, td);
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} else
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PROC_UNLOCK(p);
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return ret;
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}
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int
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ibcs2_creat(td, uap)
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struct thread *td;
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struct ibcs2_creat_args *uap;
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{
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char *path;
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int error;
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CHECKALTCREAT(td, uap->path, &path);
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error = kern_openat(td, AT_FDCWD, path, UIO_SYSSPACE,
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O_WRONLY | O_CREAT | O_TRUNC, uap->mode);
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free(path, M_TEMP);
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return (error);
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}
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int
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ibcs2_access(td, uap)
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struct thread *td;
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struct ibcs2_access_args *uap;
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{
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char *path;
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int error;
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CHECKALTEXIST(td, uap->path, &path);
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error = kern_accessat(td, AT_FDCWD, path, UIO_SYSSPACE, 0, uap->amode);
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free(path, M_TEMP);
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return (error);
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}
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int
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ibcs2_fcntl(td, uap)
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struct thread *td;
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struct ibcs2_fcntl_args *uap;
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{
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intptr_t arg;
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int error;
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struct flock fl;
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struct ibcs2_flock ifl;
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arg = (intptr_t)uap->arg;
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switch(uap->cmd) {
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case IBCS2_F_DUPFD:
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return (kern_fcntl(td, uap->fd, F_DUPFD, arg));
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case IBCS2_F_GETFD:
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return (kern_fcntl(td, uap->fd, F_GETFD, arg));
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case IBCS2_F_SETFD:
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return (kern_fcntl(td, uap->fd, F_SETFD, arg));
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case IBCS2_F_GETFL:
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error = kern_fcntl(td, uap->fd, F_GETFL, arg);
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if (error)
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return error;
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td->td_retval[0] = oflags2ioflags(td->td_retval[0]);
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return error;
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case IBCS2_F_SETFL:
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return (kern_fcntl(td, uap->fd, F_SETFL,
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ioflags2oflags(arg)));
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case IBCS2_F_GETLK:
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{
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error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, &fl);
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error = kern_fcntl(td, uap->fd, F_GETLK, (intptr_t)&fl);
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if (error)
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return error;
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cvt_flock2iflock(&fl, &ifl);
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return copyout((caddr_t)&ifl, (caddr_t)uap->arg,
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ibcs2_flock_len);
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}
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case IBCS2_F_SETLK:
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{
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error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, &fl);
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return (kern_fcntl(td, uap->fd, F_SETLK, (intptr_t)&fl));
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}
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case IBCS2_F_SETLKW:
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{
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error = copyin((caddr_t)uap->arg, (caddr_t)&ifl,
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ibcs2_flock_len);
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if (error)
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return error;
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cvt_iflock2flock(&ifl, &fl);
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return (kern_fcntl(td, uap->fd, F_SETLKW, (intptr_t)&fl));
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}
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}
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return ENOSYS;
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}
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