diff options
Diffstat (limited to 'sys/kern/vfs_syscalls.c')
| -rw-r--r-- | sys/kern/vfs_syscalls.c | 212 |
1 files changed, 211 insertions, 1 deletions
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 896640a6198..7979efaf68b 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vfs_syscalls.c,v 1.64 2000/04/15 19:52:48 csapuntz Exp $ */ +/* $OpenBSD: vfs_syscalls.c,v 1.65 2000/04/20 06:32:00 deraadt Exp $ */ /* $NetBSD: vfs_syscalls.c,v 1.71 1996/04/23 10:29:02 mycroft Exp $ */ /* @@ -2797,3 +2797,213 @@ sys_ogetfsstat(p, v, retval) *retval = count; return (0); } + + +/* + * Positional read system call. + */ +int +sys_pread(p, v, retval) + struct proc *p; + void *v; + register_t *retval; +{ + struct sys_pread_args /* { + syscallarg(int) fd; + syscallarg(void *) buf; + syscallarg(size_t) nbyte; + syscallarg(off_t) offset; + } */ *uap = v; + struct filedesc *fdp = p->p_fd; + struct file *fp; + struct vnode *vp; + off_t offset; + int error, fd = SCARG(uap, fd); + + if ((u_int)fd >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[fd]) == NULL || +#if notyet + (fp->f_iflags & FIF_WANTCLOSE) != 0 || +#endif + (fp->f_flag & FREAD) == 0) + return (EBADF); + +#if notyet + FILE_USE(fp); +#endif + + vp = (struct vnode *)fp->f_data; + if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { + error = ESPIPE; + goto out; + } + + offset = SCARG(uap, offset); + + /* dofileread() will unuse the descriptor for us */ + return (dofileread(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), + &offset, retval)); + + out: +#if notyet + FILE_UNUSE(fp, p); +#endif + return (error); +} + +/* + * Positional scatter read system call. + */ +int +sys_preadv(p, v, retval) + struct proc *p; + void *v; + register_t *retval; +{ + struct sys_preadv_args /* { + syscallarg(int) fd; + syscallarg(const struct iovec *) iovp; + syscallarg(int) iovcnt; + syscallarg(off_t) offset; + } */ *uap = v; + struct filedesc *fdp = p->p_fd; + struct file *fp; + struct vnode *vp; + off_t offset; + int error, fd = SCARG(uap, fd); + + if ((u_int)fd >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[fd]) == NULL || +#if notyet + (fp->f_iflags & FIF_WANTCLOSE) != 0 || +#endif + (fp->f_flag & FREAD) == 0) + return (EBADF); + +#if notyet + FILE_USE(fp); +#endif + + vp = (struct vnode *)fp->f_data; + if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { + error = ESPIPE; + goto out; + } + + offset = SCARG(uap, offset); + + /* dofilereadv() will unuse the descriptor for us */ + return (dofilereadv(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), + &offset, retval)); + + out: +#if notyet + FILE_UNUSE(fp, p); +#endif + return (error); +} + +/* + * Positional write system call. + */ +int +sys_pwrite(p, v, retval) + struct proc *p; + void *v; + register_t *retval; +{ + struct sys_pwrite_args /* { + syscallarg(int) fd; + syscallarg(const void *) buf; + syscallarg(size_t) nbyte; + syscallarg(off_t) offset; + } */ *uap = v; + struct filedesc *fdp = p->p_fd; + struct file *fp; + struct vnode *vp; + off_t offset; + int error, fd = SCARG(uap, fd); + + if ((u_int)fd >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[fd]) == NULL || +#if notyet + (fp->f_iflags & FIF_WANTCLOSE) != 0 || +#endif + (fp->f_flag & FWRITE) == 0) + return (EBADF); + +#if notyet + FILE_USE(fp); +#endif + + vp = (struct vnode *)fp->f_data; + if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { + error = ESPIPE; + goto out; + } + + offset = SCARG(uap, offset); + + /* dofilewrite() will unuse the descriptor for us */ + return (dofilewrite(p, fd, fp, SCARG(uap, buf), SCARG(uap, nbyte), + &offset, retval)); + + out: +#if notyet + FILE_UNUSE(fp, p); +#endif + return (error); +} + + +/* + * Positional gather write system call. + */ +int +sys_pwritev(p, v, retval) + struct proc *p; + void *v; + register_t *retval; +{ + struct sys_pwritev_args /* { + syscallarg(int) fd; + syscallarg(const struct iovec *) iovp; + syscallarg(int) iovcnt; + syscallarg(off_t) offset; + } */ *uap = v; + struct filedesc *fdp = p->p_fd; + struct file *fp; + struct vnode *vp; + off_t offset; + int error, fd = SCARG(uap, fd); + + if ((u_int)fd >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[fd]) == NULL || +#if notyet + (fp->f_iflags & FIF_WANTCLOSE) != 0 || +#endif + (fp->f_flag & FWRITE) == 0) + return (EBADF); + +#if notyet + FILE_USE(fp); +#endif + vp = (struct vnode *)fp->f_data; + if (fp->f_type != DTYPE_VNODE || vp->v_type == VFIFO) { + error = ESPIPE; + goto out; + } + + offset = SCARG(uap, offset); + + /* dofilewritev() will unuse the descriptor for us */ + return (dofilewritev(p, fd, fp, SCARG(uap, iovp), SCARG(uap, iovcnt), + &offset, retval)); + + out: +#if notyet + FILE_UNUSE(fp, p); +#endif + return (error); +} + |