diff options
Diffstat (limited to 'sys/kern/sys_generic.c')
| -rw-r--r-- | sys/kern/sys_generic.c | 133 |
1 files changed, 132 insertions, 1 deletions
diff --git a/sys/kern/sys_generic.c b/sys/kern/sys_generic.c index b607f71..e19fed8 100644 --- a/sys/kern/sys_generic.c +++ b/sys/kern/sys_generic.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)sys_generic.c 8.5 (Berkeley) 1/21/94 - * $Id: sys_generic.c,v 1.44 1999/01/27 21:49:57 dillon Exp $ + * $Id: sys_generic.c,v 1.45 1999/01/29 08:10:35 bde Exp $ */ #include "opt_ktrace.h" @@ -132,6 +132,70 @@ read(p, uap) } /* + * pread system call. + */ +#ifndef _SYS_SYSPROTO_H_ +struct pread_args { + int fd; + void *buf; + size_t nbyte; + off_t offset; +}; +#endif +/* ARGSUSED */ +int +pread(p, uap) + struct proc *p; + register struct pread_args *uap; +{ + register struct file *fp; + register struct filedesc *fdp = p->p_fd; + struct uio auio; + struct iovec aiov; + long cnt, error = 0; +#ifdef KTRACE + struct iovec ktriov; +#endif + + if (((u_int)uap->fd) >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[uap->fd]) == NULL || + (fp->f_flag & FREAD) == 0) + return (EBADF); + if (fp->f_type != DTYPE_VNODE) + return (ESPIPE); + aiov.iov_base = (caddr_t)uap->buf; + aiov.iov_len = uap->nbyte; + auio.uio_iov = &aiov; + auio.uio_iovcnt = 1; + auio.uio_offset = uap->offset; + if (uap->nbyte > INT_MAX) + return (EINVAL); + auio.uio_resid = uap->nbyte; + auio.uio_rw = UIO_READ; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_procp = p; +#ifdef KTRACE + /* + * if tracing, save a copy of iovec + */ + if (KTRPOINT(p, KTR_GENIO)) + ktriov = aiov; +#endif + cnt = uap->nbyte; + if ((error = (*fp->f_ops->fo_read)(fp, &auio, fp->f_cred))) + if (auio.uio_resid != cnt && (error == ERESTART || + error == EINTR || error == EWOULDBLOCK)) + error = 0; + cnt -= auio.uio_resid; +#ifdef KTRACE + if (KTRPOINT(p, KTR_GENIO) && error == 0) + ktrgenio(p->p_tracep, uap->fd, UIO_READ, &ktriov, cnt, error); +#endif + p->p_retval[0] = cnt; + return (error); +} + +/* * Scatter read system call. */ #ifndef _SYS_SYSPROTO_H_ @@ -285,6 +349,73 @@ write(p, uap) } /* + * pwrite system call + */ +#ifndef _SYS_SYSPROTO_H_ +struct pwrite_args { + int fd; + const void *buf; + size_t nbyte; + off_t offset; +}; +#endif +int +pwrite(p, uap) + struct proc *p; + register struct pwrite_args *uap; +{ + register struct file *fp; + register struct filedesc *fdp = p->p_fd; + struct uio auio; + struct iovec aiov; + long cnt, error = 0; +#ifdef KTRACE + struct iovec ktriov; +#endif + + if (((u_int)uap->fd) >= fdp->fd_nfiles || + (fp = fdp->fd_ofiles[uap->fd]) == NULL || + (fp->f_flag & FWRITE) == 0) + return (EBADF); + if (fp->f_type != DTYPE_VNODE) + return (ESPIPE); + aiov.iov_base = (caddr_t)uap->buf; + aiov.iov_len = uap->nbyte; + auio.uio_iov = &aiov; + auio.uio_iovcnt = 1; + auio.uio_offset = uap->offset; + if (uap->nbyte > INT_MAX) + return (EINVAL); + auio.uio_resid = uap->nbyte; + auio.uio_rw = UIO_WRITE; + auio.uio_segflg = UIO_USERSPACE; + auio.uio_procp = p; +#ifdef KTRACE + /* + * if tracing, save a copy of iovec + */ + if (KTRPOINT(p, KTR_GENIO)) + ktriov = aiov; +#endif + cnt = uap->nbyte; + if ((error = (*fp->f_ops->fo_write)(fp, &auio, fp->f_cred))) { + if (auio.uio_resid != cnt && (error == ERESTART || + error == EINTR || error == EWOULDBLOCK)) + error = 0; + if (error == EPIPE) + psignal(p, SIGPIPE); + } + cnt -= auio.uio_resid; +#ifdef KTRACE + if (KTRPOINT(p, KTR_GENIO) && error == 0) + ktrgenio(p->p_tracep, uap->fd, UIO_WRITE, + &ktriov, cnt, error); +#endif + p->p_retval[0] = cnt; + return (error); +} + +/* * Gather write system call */ #ifndef _SYS_SYSPROTO_H_ |
