/* $NetBSD: svr4_fcntl.c,v 1.41 2002/03/24 15:32:51 jdolecek Exp $ */ /*- * Copyright (c) 1994, 1997 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Christos Zoulas. * * 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 the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``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 FOUNDATION OR CONTRIBUTORS * 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 __KERNEL_RCSID(0, "$NetBSD: svr4_fcntl.c,v 1.41 2002/03/24 15:32:51 jdolecek Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include 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_NDELAY : 0; r |= (l & SVR4_O_APPEND) ? O_APPEND : 0; r |= (l & SVR4_O_SYNC) ? O_FSYNC : 0; r |= (l & SVR4_O_RSYNC) ? O_RSYNC : 0; r |= (l & SVR4_O_DSYNC) ? O_DSYNC : 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_NDELAY : 0; r |= (l & O_APPEND) ? SVR4_O_APPEND : 0; r |= (l & O_FSYNC) ? SVR4_O_SYNC : 0; r |= (l & O_RSYNC) ? SVR4_O_RSYNC : 0; r |= (l & O_DSYNC) ? SVR4_O_DSYNC : 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 ((fp = fd_getfile(fdp, fd)) == NULL) return EBADF; if (fp->f_type != DTYPE_VNODE) return EINVAL; vp = (struct vnode *) fp->f_data; 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)) VOP_REVOKE(vp, REVOKEALL); 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 ((fp = fd_getfile(fdp, fd)) == NULL) return EBADF; vp = (struct vnode *)fp->f_data; if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) 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) 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, 0); SCARG(&cup, flags) = svr4_to_bsd_flags(SCARG(uap, flags)); if (SCARG(&cup, flags) & O_CREAT) CHECK_ALT_CREAT(p, &sg, SCARG(uap, path)); else CHECK_ALT_EXIST(p, &sg, SCARG(uap, path)); SCARG(&cup, path) = SCARG(uap, path); 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; fp = fd_getfile(fdp, *retval); /* ignore any error, just give it a try */ if (fp != NULL && 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) struct proc *p; void *v; register_t *retval; { return svr4_sys_open(p, v, retval); } int svr4_sys_creat(p, v, retval) 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, 0); 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) struct proc *p; void *v; register_t *retval; { return svr4_sys_creat(p, v, retval); } int svr4_sys_llseek(p, v, retval) 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) 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, 0); 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) struct proc *p; void *v; register_t *retval; { struct svr4_sys_pread_args *uap = v; struct sys_pread_args pra; /* * Just translate the args structure and call the NetBSD * pread(2) system call (offset type is 64-bit in NetBSD). */ SCARG(&pra, fd) = SCARG(uap, fd); SCARG(&pra, buf) = SCARG(uap, buf); SCARG(&pra, nbyte) = SCARG(uap, nbyte); SCARG(&pra, offset) = SCARG(uap, off); return (sys_pread(p, &pra, retval)); } int svr4_sys_pread64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct svr4_sys_pread64_args *uap = v; struct sys_pread_args pra; /* * Just translate the args structure and call the NetBSD * pread(2) system call (offset type is 64-bit in NetBSD). */ SCARG(&pra, fd) = SCARG(uap, fd); SCARG(&pra, buf) = SCARG(uap, buf); SCARG(&pra, nbyte) = SCARG(uap, nbyte); SCARG(&pra, offset) = SCARG(uap, off); return (sys_pread(p, &pra, retval)); } int svr4_sys_pwrite(p, v, retval) struct proc *p; void *v; register_t *retval; { struct svr4_sys_pwrite_args *uap = v; struct sys_pwrite_args pwa; /* * Just translate the args structure and call the NetBSD * pwrite(2) system call (offset type is 64-bit in NetBSD). */ SCARG(&pwa, fd) = SCARG(uap, fd); SCARG(&pwa, buf) = SCARG(uap, buf); SCARG(&pwa, nbyte) = SCARG(uap, nbyte); SCARG(&pwa, offset) = SCARG(uap, off); return (sys_pwrite(p, &pwa, retval)); } int svr4_sys_pwrite64(p, v, retval) struct proc *p; void *v; register_t *retval; { struct svr4_sys_pwrite64_args *uap = v; struct sys_pwrite_args pwa; /* * Just translate the args structure and call the NetBSD * pwrite(2) system call (offset type is 64-bit in NetBSD). */ SCARG(&pwa, fd) = SCARG(uap, fd); SCARG(&pwa, buf) = SCARG(uap, buf); SCARG(&pwa, nbyte) = SCARG(uap, nbyte); SCARG(&pwa, offset) = SCARG(uap, off); return (sys_pwrite(p, &pwa, retval)); } int svr4_sys_fcntl(p, v, retval) 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. */ register_t flags; int cmd; 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, 0); flp = stackgap_alloc(p, &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); SCARG(&du, to) = (int)(u_long)SCARG(uap, arg); 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, 0); flp = stackgap_alloc(p, &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; } }